CN110788570B - Welding process for ultrathin-wall internal thread TA2 titanium radiating pipe - Google Patents
Welding process for ultrathin-wall internal thread TA2 titanium radiating pipe Download PDFInfo
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- CN110788570B CN110788570B CN201911035940.3A CN201911035940A CN110788570B CN 110788570 B CN110788570 B CN 110788570B CN 201911035940 A CN201911035940 A CN 201911035940A CN 110788570 B CN110788570 B CN 110788570B
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- 238000003466 welding Methods 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 40
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000010936 titanium Substances 0.000 title claims abstract description 39
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 93
- 238000004049 embossing Methods 0.000 claims abstract description 48
- 238000003860 storage Methods 0.000 claims abstract description 30
- 238000010008 shearing Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000006698 induction Effects 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 208000032544 Cicatrix Diseases 0.000 claims abstract description 4
- 231100000241 scar Toxicity 0.000 claims abstract description 4
- 230000037387 scars Effects 0.000 claims abstract description 4
- 238000007790 scraping Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 48
- 238000001125 extrusion Methods 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 9
- 230000002950 deficient Effects 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000010924 continuous production Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 239000010953 base metal Substances 0.000 claims description 2
- 238000002788 crimping Methods 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000009721 upset forging Methods 0.000 claims description 2
- 238000000641 cold extrusion Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
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- 229910052749 magnesium Inorganic materials 0.000 description 1
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- 239000013535 sea water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/09—Heat pipes
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Abstract
The invention provides a welding process of an ultrathin-wall internal thread TA2 titanium radiating tube, belongs to the technical field of titanium internal thread tube manufacturing, and particularly relates to cold extrusion, cold roll forming and high-frequency welding technologies. The production process comprises the following steps: (1) uncoiling; (2) shearing and butt welding; (3) 1, speed matching; (4) a direction-changing material storage loop; (5) 2, speed matching; (6) embossing 1; (7) speed matching 3; (8) embossing 2; (9) 4, speed matching; (10) planning a hole pattern; (11) forming a V-shaped angle; (12) high-frequency induction welding; (13) cooling and scraping scars; (14) finishing the pipe shape; (15) correcting the welding line; (16) eddy current flaw detection; (17) shearing and blanking; (18) removing waste materials; (19) conveying finished products and curling. The process method can efficiently produce the ultrathin-wall internal thread TA2 titanium radiating pipe, the surface to be welded does not need to be cleaned before welding, and good weld joint structure and performance can be obtained.
Description
Technical Field
The invention relates to a welding process of an ultrathin-wall internal thread TA2 titanium radiating tube, belongs to the technical field of titanium internal thread tube manufacturing, and particularly relates to the technical field of cold extrusion, cold roll forming and high-frequency induction welding.
Background
The titanium resource in China is very rich and is a big country of titanium resource. However, the development speed of the titanium industry has been lagged behind the metal industry such as iron, aluminum, magnesium and the like for a long time due to the complex extraction process and the difficulty of extraction. At present, titanium and titanium alloy pipe fittings in China are mainly applied to the fields of industrial corrosion resistance and ships, such as nuclear power, seawater devices, ships, salt and alkali industries and the like.
At present, the main manufacturing methods of titanium and titanium alloy seamless pipes are drilling extrusion and cross rolling perforation, but the two methods have the defects of high process waste, complex process, multiple processing procedures, low efficiency, high cost and the like. And titanium alloy welded tube not only material utilization is high, and welded tube production efficiency obviously is higher than the seamless pipe simultaneously, along with people to the continuous understanding of titanium and titanium alloy welded tube spare and the continuous development of welding technique, the performance of welded tube constantly improves, and the quality level of some welded tube spares has reachd the level of seamless pipe moreover, consequently along with the popularization of titanium, the demand of welded tube spare can constantly increase.
Disclosure of Invention
In view of the problems of the background art, the invention aims to provide a welding process method for an ultra-thin wall internal thread TA2 titanium radiating pipe.
The purpose of the invention is realized by the following steps of the technical scheme: a process for welding ultrathin-wall internal-thread TA2 titanium radiating tubes, comprising the steps of:
(1) uncoiling: hoisting a steel strip coil on an expansion head of a double-station high-speed uncoiler at a feeding station to be tensioned, and rotating the steel strip coil to a working station; and hoisting a coil of strip material on the other expansion head rotated to the feeding station for standby. The strip coil at the working station is uncoiled at the speed of more than or equal to 300m/min by automatically additionally arranging a protective turntable and a power driving energy, and the allowance of the strip coil is monitored in real time by a strip material thickness measuring sensor so as to control the uncoiler and a diversion storage loop of a subsequent process to decelerate and then stop in a delayed manner;
(2) shearing and butt welding: forming a 45-degree shearing bevel opening between the tail end of the front coiled material and the first section of the rear coiled material, and then carrying out butt welding along a 45-degree notch under the protection of argon by an argon arc welding machine, wherein the 45-degree trimming is used for increasing the welding length and improving the welding strength;
(3) speed matching 1: the material storage speed of the turning material storage loop is taken as a reference, when the uncoiling speed of the uncoiler fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the uncoiling speed of the uncoiler is controlled to match the material storage speed through a position detection output signal of the position sensor;
(4) diversion storage loop: the parallel conveying of the strip is changed into vertical conveying through the diversion storage loop, the strip is stored in the loop at the speed of more than or equal to 300m/min for continuous production without stopping of the rear-end pipe making platform, and the production time of more than 6min can be used for shearing and butt welding of the strip; the vertical belt materials are changed into the belt materials which are transmitted in parallel and then are transmitted out when the belt materials are output by the diversion storage loop;
(5) speed matching 2: the conveying speed of the first embossing machine is taken as a reference, when the material storage speed fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the conveying speed of the first embossing machine is matched by controlling the speed of the material storage through a position measuring output signal of a position sensor;
(6) embossing 1: pressing the screw tooth profile of the upper surface of the belt material (or simultaneously pressing the upper and lower surface tooth profiles of the belt material) at a pressing speed of 100 and 200m/min at a station of an embosser; the pressed tooth form can press various complex W-shaped, VVV-shaped, cross-shaped, high-low tooth form and other threads according to the use requirements of the radiating pipe, and is used for increasing the heat exchange area of the welded pipe and improving the heat exchange efficiency; the embossing process is realized by matching three output rollers: the outer surface of the upper power output roller is composed of N threads with various spirals and various tooth profile angles, tooth crest angles, tooth heights and tooth numbers, the middle roller is an inert unpowered smooth roller which transmits the rotating torque of the upper roller and the lower roller by means of friction force, and the lower roller is a rotating power output smooth roller (or a roller with thread tooth profile as the upper roller); when the strip passes through the middle of the upper power roller and the inert smooth roller, the strip is rolled into the strip with the needed twill tooth shape, the height or the depth of the rolling tooth shape is finished by driving respective actuating mechanisms by servo motors on front and rear supporting seats of the upper roller, and a pressure sensor in the actuating mechanisms can display a real-time pressure value;
(7) speed matching 3: the conveying speed of the second embossing machine is taken as a reference, when the conveying speed of the first embossing machine fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the speed of the first embossing machine is controlled by a position measuring output signal of the position sensor to match the conveying speed of the second embossing machine;
(8) embossing 2: in order to press complex threads which cannot be finished by one embossing machine, for example, after a parallel tooth form in the direction parallel to the moving direction is pressed on a cross thread (high-low tooth threads and the like) I embossing machine; pressing a tooth form forming a certain angle with the tooth form pressed by the first embossing machine on a second embossing machine, wherein the superposed tooth form is the tooth form of the thread required by the product;
(9) speed matching 4: before the strip reaches the station of the hole-type forming platform of the die, the speed difference between the second embossing machine unit and the strip die forming platform during conveying is matched and adjusted to a certain range through a tension-free speed matching and adjusting device; the working principle of the device is that the belt material is driven into a storage box by using the self-carried transmission power or the transmission power of a previous station, falls to the bottom of the storage box by depending on the self gravity, and the position of the belt material is detected by one or more photoelectric or position sensors, so that the belt material transmission speed of the previous station is adjusted to match the transmission speed of the next station;
(10) and (3) hole pattern planning: enabling the strip to be in parallel alignment with the hole pattern of a first flat roller mold on a mold forming platform through a strip precise guide device, then carrying out power forming on the strip through five to eight groups of flat roller molds and forming on five to seven groups of unpowered vertical roller molds alternately arranged with the flat roller molds, and rounding the strip at a forming speed of 100 plus materials and 200m/min for well planning the hole pattern for welding;
(11) v-shaped angle forming: the strip with the well-planned hole pattern is adjusted in a guiding extrusion welding unit through a ceramic guide strip or a ceramic guide roller on a guide device to achieve a welding V-shaped angle of 4-10 degrees required by welding, and then a welding extrusion device is used for providing parallel welding edges and proper welding extrusion force and extrusion amount for the welding edges of the strip;
(12) high-frequency induction welding: the input of high-frequency current and voltage is realized by using a variable-frequency high-frequency induction welding power supply, so that the solid-state welding of a welding edge is realized under upset forging pressure, meanwhile, slag in the welding seam is extruded along the inner side and the outer side of the welding edge to ensure that the welding seam obtains a good welding seam structure, and a large amount of oxygen, nitrogen and the like enter a welding pool to form oxides and pollutants in the molten titanium, so that the welding seam generates various welding defects by diffusing welding metal into base metal; in order to prevent impurities such as oxygen and nitrogen in the air from being mixed, the welding surface and the inner and outer side surfaces are protected by inert gas in the welding process. A magnetic bar with a cooling device is also required to be arranged in the welding pipe and at the midpoint of the central connecting line of the two squeeze rollers to improve the welding condition and assist in smooth welding;
(13) cooling and scraping scars: rapidly cooling the welded high-temperature pipe, removing welding slag at the outer welding seam of the welded pipe by an outer scarification knife, and simultaneously removing the welding slag at the inner welding seam of the welded pipe by an inner scarification knife according to requirements;
(14) finishing the pipe type: the welded pipe is planned to reach the shape tolerance size required by the product through the hole patterns of 4-6 power flat roll frame dies and 3-5 unpowered vertical roll frame dies alternately arranged with the flat roll frame dies;
(15) correcting the weld joint: through a front pair of vertical roller frame molds and a rear pair of vertical roller frame molds which are arranged in a direction vertical to the movement direction of the welded pipe, the two pairs of vertical roller molds rotate for a certain angle on a plane vertical to the movement of the welded pipe according to requirements, so that the welding line is rectified to the uppermost part of the welded pipe, and the elimination of welding slag and the eddy current flaw detection treatment of the welding line are facilitated;
(16) eddy current flaw detection: and carrying out continuous and non-differential flaw detection on the welding seam of the welded pipe, marking the welding seam part with a problem, and simultaneously generating a problem signal instruction to control a subsequent defective product removing device to remove defective products.
(17) Shearing and blanking: after the pipe length data needing to be cut off is input, when the welded pipe passes through the pneumatic suspension length measuring device, the length measuring photoelectric encoder records the running length of the welded pipe, when the measured length reaches a given value, the photoelectric encoder outputs a signal to the cutting executing mechanism, the cutting executing mechanism acts to accelerate the running speed of the welded pipe, when the measured length reaches a synchronous speed, the welded pipe is cut off, and then the welded pipe is decelerated to return to the original point to wait for the instruction of the next action;
(18) waste material removal: waste material removal: the device is used for removing the defective welded pipe through a cylinder turning plate after receiving a command signal sent by the eddy current inspection system;
(19) conveying finished products and curling: the finished product conveying crimping machine unit is used for alternately collecting welded overlong welded pipes of about five kilometers and more by the two material frame mechanism units; the process comprises the following steps: presetting the length of a welded pipe to be collected of a curled material frame at a flying shear blanking station, if the current first material frame station works, the material frame conveys the material frame at an unloading station to a working station through a raceway, a lifting mechanism lifts the material frame to a material receiving position, a rotating mechanism drives the material frame to rotate so that the circumferential linear speed of the material receiving position of the material frame is equal to the clamping conveying speed of the welded pipe, and the welded pipe bends to be the curvature which is equivalent to the material receiving radius of the material frame through the first clamping conveying mechanism and a bending adjusting mechanism on a coiling machine and is conveyed to the material frame at the synchronous linear speed; when the welded pipe collected by the first material frame reaches the length set by the flying shear blanking, the flying shear blanking is cut off, and a fracture at the position to be cut off is about to reach the first clamping mechanism, the bending adjusting mechanism exits, the second connecting pipe sleeve extends to the side of the first clamping mechanism (the first material frame is collected completely at the moment, the rotating mechanism stops running, the lifting mechanism lowers the material frame onto the conveying roller path, the conveying roller path conveys the material frame to the unloading station for unloading), the welded pipe conveyed by the first clamping mechanism is connected to the second clamping mechanism, and the welded pipe is guided to the second synchronous linear speed material frame through the second clamping mechanism and the second bending adjusting mechanism and is continuously collected by the second material frame. When the welded pipe collected by the second material frame reaches the length set by the blanking of the flying shear, the blanking of the flying shear is cut off, and the fracture at the position to be cut off is about to reach the first clamping and conveying mechanism, the second connecting pipe sleeve is retracted, the first bending and adjusting mechanism extends out (at the moment, the second clamping and conveying mechanism conveys the tail pipe into the second material frame, the second clamping and conveying mechanism stops working, the second rotating mechanism stops working, the lifting mechanism drops the second material frame onto the conveying raceway, the conveying raceway conveys the material frame to the unloading station for unloading), the welded pipe is guided into the first material frame waiting at the working station again to be collected, and at the moment, the finished product conveying coiler unit finishes a cycle process.
On the basis of the above scheme and as a preferable scheme of the scheme: the wall thickness of the ultra-thin-wall internal thread TA2 titanium strip is 0.16-0.5 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the cut edge of the shear butt weld was 45 °.
On the basis of the above scheme and as a preferable scheme of the scheme: the material storage speed of the diversion material storage loop is more than or equal to 300 m/min.
On the basis of the above scheme and as a preferable scheme of the scheme: the embossing speed of the embossing machine is 100-200m/min, and the embossing machine can be used for pressing W-shaped, VVV-shaped, herringbone and other threads and is used for increasing the heat exchange area of the pipe and improving the heat exchange efficiency of the pipe.
On the basis of the above scheme and as a preferable scheme of the scheme: the combined use of the second embossing machine and the first embossing machine can press complex threads which cannot be finished by one embossing machine, such as cross threads and high-low tooth threads.
On the basis of the above scheme and as a preferable scheme of the scheme: the V-shaped angle of the manufactured high-frequency welding circular tube is 4-10 degrees.
On the basis of the above scheme and as a preferable scheme of the scheme: the induction welding speed of the high-frequency welding is 80-150m/min, the power of the welding machine is 100KW, the welding frequency is 300-500KHZ, and the relative extrusion amount is 0.1-0.5 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the internal thread is formed at the speed of 100 plus 200m/min, and the thread specification is-0.22 tooth height-26 degree helical angle.
On the basis of the above scheme and as a preferable scheme of the scheme: the internal thread pipe is molded into a pipe shape at the speed of 100-.
On the basis of the above scheme and as a preferable scheme of the scheme: the speed of collecting finished products by the crimper unit is 100-200m/min, and the collection length is 5000 m.
The invention has the beneficial effects that: at home and abroad, a machine set capable of producing ultrathin-wall internal thread TA2 titanium welded pipes does not exist at present, and compared with a titanium seamless pipe obtained by drilling extrusion and oblique roll perforation, the ultrathin-wall TA2 titanium welded pipe production process and the optimized parameters provided by the invention have the beneficial effects that: the process method is simple and effective, high in production efficiency, capable of realizing automatic production, low in production cost, high in continuous efficiency and strong in reliability. Compared with other welded tube process methods, the method has the advantages that: no need of welding seam filler, no welding spatter, narrow welding heat affected zone, beautiful welding formation and good welding mechanical property. Therefore, the titanium radiating pipe can be widely applied to the future production of TA2 titanium radiating pipes.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a finished view of the ultra-thin wall internal thread TA2 titanium heat pipe made by the present invention.
FIG. 3 is a metallographic photograph of a weld of an ultra thin wall internal thread TA2 titanium heat pipe made in accordance with the present invention.
Detailed Description
The invention is further described below in conjunction with the appended drawings and detailed description examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below are exemplary and are intended to be illustrative, but not limiting, of the present invention, and any modifications, equivalents, or improvements made within the spirit and principle of the present invention, which are not described in detail in the technical solutions below, are known in the art, and are intended to be included within the scope of the claims of the present invention.
The ultra-thin wall internal thread TA2 titanium radiating pipe is manufactured according to the following steps:
uncoiling: uncoiling a stainless steel strip coil at the speed of about 300m/min, wherein the thickness of the ultrathin-wall TA2 titanium strip is 0.5 mm;
shearing and butt welding: cutting the tail part of the front coiled strip material and the head part of the rear coiled strip material by 45 degrees, and welding the cut parts along 45 degrees by argon arc welding;
speed matching 1: the uncoiling speed of the uncoiler is adjusted by taking the material storage speed of the diversion material storage loop as a reference through a gravity adjusting roller;
diversion storage loop: the parallel conveying of the strip materials is changed into vertical conveying, the strip materials are stored in the loop at the speed of about 300m/min for continuous production without stopping of a rear-end pipe making platform, and meanwhile, the vertical strip material conveying is changed into parallel strip material conveying by the diversion storage loop;
speed matching 2: the conveying speed of the first embossing machine is taken as a reference, and the material storage speed is adjusted through a gravity adjusting roller;
embossing 1: the first embossing machine presses a parallel tooth form of the crossed internal thread in the moving direction by matching three output rollers, and the pressing speed is 150 m/min;
speed matching 3: the conveying speed of the second embossing machine is taken as a reference, and the speed of the first embossing machine is adjusted through a gravity adjusting roller;
embossing 2: the second embossing machine presses crossed internal threads forming a certain angle with the tooth form pressed by the first embossing machine through the matching of the three output rollers, the superposed tooth form is the tooth form of the threads required by the product, and the specification of the threads pressed by the first embossing machine and the second embossing machine is a helical angle of-0.22 tooth height to-26 degrees;
speed matching 4: matching and adjusting the speed difference between the second embossing machine unit and the belt material mold forming platform during conveying through a tension-free speed matching and adjusting device;
and (3) hole pattern planning: rounding the strip at a forming speed of 150m/min to form a circular hole pattern for welding, wherein the pipe type specification is 9.52 external diameter x 0.28 pipe bottom thickness;
adjusting before welding: guiding the extrusion welding unit to enable the welding V-shaped angle to be 7 degrees and the extrusion amount to be 0.2 mm;
high-frequency induction welding: the welding speed is 80m/min, the power of a welding machine is 56KW, and the welding frequency is 400 KHZ;
cooling and scraping scars: removing redundant welding slag at the welding seam, and removing the welding slag of the inner welding seam according to the requirement;
a tubular finishing platform: performing precise outer diameter shaping on the pipe subjected to welding and welding slag removal to meet the requirement of dimensional tolerance;
correcting the weld joint: rotating the two pairs of vertical roller dies by a certain angle on a plane vertical to the movement of the welded pipe so that the welding line is rectified to the uppermost part of the welded pipe; shearing and blanking: shearing and blanking are carried out through a flying shear shearing system according to the required pipe length;
an eddy current flaw detection system: carrying out continuous and non-differential flaw detection on the welding seam, marking the problematic part and generating a problem signal instruction to control a subsequent defective product removing device to remove defective products;
shearing and blanking: after collecting the welded five-kilometer ultra-long coiled pipe, cutting off the welded pipe at the synchronous speed of 150m/min of the operation of the welded pipe;
waste material removal: rejecting defective welded pipes after receiving command signals sent by an eddy current inspection system;
conveying a finished product: the screened ultra-thin wall TA2 titanium radiating pipe can be directly packaged for use.
The finished product of the ultrathin-wall internal thread TA2 titanium radiating pipe produced by the process method is shown in figure 2, the weld surface is attractive in appearance, and no macroscopic defect exists.
The metallographic photograph of the cross section of the welding seam of the ultrathin-wall internal thread TA2 titanium radiating pipe produced by the process method is shown in figure 3, the width of the fusion line is reasonable, and the ultrathin-wall internal thread TA2 titanium radiating pipe has no defects of misalignment, oxide inclusion and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A welding process for an ultrathin-wall internal thread TA2 titanium radiating tube is characterized by comprising the following steps of:
(1) uncoiling: hoisting a steel strip coil on an expansion head of a double-station high-speed uncoiler at a feeding station to be tensioned, and rotating the steel strip coil to a working station; hoisting a coil of strip material on the other expansion head rotated to the feeding station for later use; the strip coil at the working station is uncoiled at the speed of more than or equal to 300m/min by automatically additionally arranging a protective turntable and a power driving energy, and the allowance of the strip coil is monitored in real time by a strip material thickness measuring sensor so as to control the uncoiler and a diversion storage loop of a subsequent process to decelerate and then stop in a delayed manner;
(2) shearing and butt welding: forming a 45-degree shearing bevel opening between the tail end of the front coiled belt material and the first section of the rear coiled belt material, and then carrying out butt welding along the 45-degree notch under the protection of argon by an argon arc welding machine;
(3) speed matching 1: the material storage speed of the turning material storage loop is taken as a reference, when the uncoiling speed of the uncoiler fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the uncoiling speed of the uncoiler is controlled to match the material storage speed through a position detection output signal of the position sensor;
(4) diversion storage loop: the parallel conveying of the strip is changed into vertical conveying through the diversion storage loop, the strip is stored in the loop at the speed of more than or equal to 300m/min for continuous production without stopping of the rear-end pipe making platform, and the production time of more than 6min can be used for shearing and butt welding of the strip; the vertical belt materials are changed into the belt materials which are transmitted in parallel and then are transmitted out when the belt materials are output by the diversion storage loop;
(5) speed matching 2: the conveying speed of the first embossing machine is taken as a reference, when the material storage speed fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the conveying speed of the first embossing machine is matched by controlling the speed of the material storage through a position measuring output signal of a position sensor;
(6) embossing 1: pressing the tooth forms of the threads on the upper surface of the strip at the station of the embossing machine, or simultaneously pressing the tooth forms of the upper surface and the lower surface of the strip at the pressing speed of 100 and 200 m/min; the pressed tooth profile can press W-shaped and VVV-shaped threads according to the use requirements of the radiating pipe; the embossing process is realized by matching three output rollers: the outer surface of the upper roller is composed of N threads with various spirals and various tooth profile angles, tooth crest angles, tooth heights and tooth numbers, the middle roller is an inert unpowered smooth roller which transmits the rotating torque of the upper roller and the lower roller by means of friction force, and the lower roller is a rotating power output smooth roller and can also be a roller with a thread tooth profile like the upper roller; when the strip passes through the middle of the upper roller and the inert unpowered smooth roller, the strip is rolled into the strip with the needed twill tooth shape, the height or the depth of the rolling tooth shape is finished by driving respective actuating mechanisms by servo motors on front and rear supporting seats of the upper roller, and a pressure sensor in the actuating mechanisms can display a real-time pressure value;
(7) speed matching 3: the conveying speed of the second embossing machine is taken as a reference, when the conveying speed of the first embossing machine fluctuates, the vertical position of the gravity adjusting roller on the speed matching adjustment fluctuates, and the speed of the first embossing machine is controlled by a position measuring output signal of the position sensor to match the conveying speed of the second embossing machine;
(8) embossing 2: in order to press complex threads which cannot be finished by one embossing machine, such as cross threads and high-low tooth threads, a parallel tooth form parallel to the motion direction is pressed on the first embossing machine; pressing a tooth form forming a certain angle with the tooth form pressed by the first embossing machine on a second embossing machine, wherein the superposed tooth form is the tooth form of the thread required by the product;
(9) speed matching 4: before the strip reaches the station of the hole-type forming platform of the die, the speed difference between the second embossing machine unit and the hole-type forming platform of the strip die during conveying is matched and adjusted to a certain range through a tension-free speed matching and adjusting device; the working principle of the device is that the belt material is driven into a storage box by using the self-carried transmission power or the transmission power of a previous station, falls to the bottom of the storage box by depending on the self gravity, and the position of the belt material is detected by one or more photoelectric or position sensors, so that the belt material transmission speed of the previous station is adjusted to match the transmission speed of the next station;
(10) and (3) hole pattern planning: enabling the strip to be in parallel alignment with the hole pattern of a first flat roller mold on a mold hole pattern forming platform through a strip precise guide device, then carrying out power forming on the strip through five to eight groups of flat roller molds and forming on five to seven groups of unpowered vertical roller molds alternately arranged with the flat roller molds, and rounding the strip at a forming speed of 100 and 200m/min to make hole pattern planning for welding;
(11) v-shaped angle forming: the strip with the well-planned hole pattern is adjusted in a guiding extrusion welding unit through a ceramic guide strip or a ceramic guide roller on a guide device to achieve a welding V-shaped angle of 4-10 degrees required by welding, and then a welding extrusion device is used for providing parallel welding edges and proper welding extrusion force and extrusion amount for the welding edges of the strip;
(12) high-frequency induction welding: the input of high-frequency current and voltage is realized by using a variable-frequency high-frequency induction welding power supply, so that the solid-state welding of a welding edge is realized under upset forging pressure, meanwhile, slag in the welding seam is extruded along the inner side and the outer side of the welding edge to ensure that the welding seam obtains a good welding seam structure, and a large amount of oxygen and nitrogen enter a welding pool to form oxides and pollutants in the molten titanium, so that the welding seam generates various welding defects by diffusing welding metal into base metal; in order to prevent oxygen and nitrogen impurities in the air from being mixed, the welding surface and the inner and outer side surfaces are protected by inert gas in the welding process, and a magnetic rod with a cooling device is required to be arranged in the welding pipe and at the midpoint of the central connecting line of the two squeeze rolls so as to improve the smooth operation of auxiliary welding under the welding working condition;
(13) cooling and scraping scars: rapidly cooling the welded high-temperature pipe, removing welding slag at the outer welding seam of the welded pipe by an outer scarification knife, and simultaneously removing the welding slag at the inner welding seam of the welded pipe by an inner scarification knife according to requirements;
(14) finishing the pipe type: the welded pipe is planned to reach the shape tolerance size required by the product through the hole patterns of 4-6 power flat roll frame dies and 3-5 unpowered vertical roll frame dies alternately arranged with the flat roll frame dies;
(15) correcting the weld joint: through a front pair of vertical roller frame moulds and a rear pair of vertical roller frame moulds which are arranged in a direction vertical to the movement direction of the welded pipe, the two pairs of vertical roller frame moulds rotate for a certain angle on a plane vertical to the movement of the welded pipe according to requirements, so that a welding seam is rectified to the uppermost part of the welded pipe, and the elimination of welding slag and the eddy current flaw detection treatment of the welding seam are facilitated;
(16) eddy current flaw detection: carrying out continuous and non-differential flaw detection on the welding seam of the welded pipe, marking the welding seam part with a problem, and generating a problem signal instruction to control a subsequent defective product removing device to remove defective products;
(17) shearing and blanking: after the pipe length data needing to be cut off is input, when the welded pipe passes through the pneumatic suspension length measuring device, the length measuring photoelectric encoder records the running length of the welded pipe, when the measured length reaches a given value, the photoelectric encoder outputs a signal to the cutting executing mechanism, the cutting executing mechanism acts to accelerate the running speed of the welded pipe, when the measured length reaches a synchronous speed, the welded pipe is cut off, and then the welded pipe is decelerated to return to the original point to wait for the instruction of the next action;
(18) waste material removal: the device is used for removing the defective welded pipe through a cylinder turning plate after receiving a command signal sent by the eddy current inspection system;
(19) conveying finished products and curling: the finished product conveying crimping machine unit is used for alternately collecting welded ultra-long welded pipes of more than five kilometers by the two material frame mechanism units; the process comprises the following steps: presetting the length of a welded pipe to be collected of a curled material frame at a flying shear blanking station, if the current first material frame station works, conveying the material frame at an unloading station to a working station through a raceway, lifting the material frame to a material receiving position by a lifting mechanism, driving the material frame to rotate by a rotating mechanism to enable the circumferential linear speed of the material receiving position to be equal to the clamping conveying speed of the welded pipe, and bending the welded pipe into a curvature which is equivalent to the material receiving radius of the material frame to convey the welded pipe to the material frame at a synchronous linear speed through a first clamping conveying mechanism and a bending adjusting mechanism on a coiling machine; when a welded pipe collected by a first material frame reaches the length set by the blanking of the flying shear, the blanking of the flying shear is cut off, when a fracture at the position to be cut off is about to reach a first clamping and conveying mechanism, a bending adjusting mechanism exits, a second connecting pipe sleeve extends to the side of the first clamping and conveying mechanism, the first material frame is collected, the rotating mechanism stops running, a lifting mechanism lowers the material frame onto a conveying raceway, the material frame is conveyed to an unloading station by the conveying raceway and is unloaded, the welded pipe conveyed by the first clamping and conveying mechanism is connected to a second clamping and conveying mechanism, and the welded pipe is guided into a second material frame at a synchronous linear speed through the second clamping and conveying mechanism and the second bending adjusting mechanism and is continuously collected by the second material frame; when the welded pipe collected by the second material frame reaches the length set by the flying shear blanking, the flying shear blanking is cut off, when a fracture at the position to be cut off is about to reach the first clamping and conveying mechanism, the second connecting pipe sleeve is retracted, the first bending and adjusting mechanism extends out, the second clamping and conveying mechanism conveys the tail pipe to the second material frame, the second clamping and conveying mechanism stops working, the second rotating mechanism stops working, the lifting mechanism drops the second material frame onto the conveying roller path, the conveying roller path conveys the material frame to the unloading station for unloading, the welded pipe is guided to the first material frame waiting at the working station again to be collected, and the finished product conveying coiler unit finishes a cycle process.
2. The process of claim 1 wherein said ultra thin wall internal thread TA2 titanium heat pipe is welded by: the wall thickness of the ultra-thin-wall internal thread TA2 titanium strip is 0.16-0.5 mm.
3. The process of claim 1 wherein said ultra thin wall internal thread TA2 titanium heat pipe is welded by: the induction welding speed of the high-frequency welding is 80-150m/min, the power of the welding machine is 100KW, the welding frequency is 300-500KHZ, and the relative extrusion amount is 0.1-0.5 mm.
4. The process of claim 1 wherein said ultra thin wall internal thread TA2 titanium heat pipe is welded by: the internal thread is formed at a speed of 100 plus 200m/min, and the thread specification is 0.22 tooth height 26oA helix angle.
5. The process of claim 1 wherein said ultra thin wall internal thread TA2 titanium heat pipe is welded by: the internal thread pipe is molded into a pipe shape at the speed of 100-.
6. The process of claim 1 wherein said ultra thin wall internal thread TA2 titanium heat pipe is welded by: the speed of collecting finished products by the crimper unit is 100-200m/min, and the collection length is 5000 m.
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| CN114273457A (en) * | 2021-12-24 | 2022-04-05 | 武汉市博钛新材料科技有限公司 | Production method of superhard titanium alloy high-frequency induction welded pipe |
| CN115464333B (en) * | 2021-12-30 | 2024-03-22 | 武汉市博钛新材料科技有限公司 | TA18 titanium bicycle frame seamless welded pipe and production process |
| CN115055534A (en) * | 2022-07-04 | 2022-09-16 | 武汉市博钛新材料科技有限公司 | A production process of high frequency induction welding titanium alloy coiled tubing |
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| US10016857B2 (en) * | 2015-02-02 | 2018-07-10 | Asia Vital Components Co., Ltd. | Method of removing ineffective portion of flat heat pipe |
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| CN102873546A (en) * | 2011-07-14 | 2013-01-16 | 江西布兰森科技有限公司 | Device for one-step molding of flat tube with large caliber |
| CN104154796A (en) * | 2014-07-29 | 2014-11-19 | 袁新华 | Internal-thread heat exchange pipe and manufacturing process thereof |
| CN104625645A (en) * | 2015-01-13 | 2015-05-20 | 邴绍翠 | Machining method for thin-wall squared tube |
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