JPH0230338A - Method and apparatus for machining end part of pipe and spectacle punch used therefor - Google Patents

Abstract

PURPOSE:To save the manhour and to improve the productivity by enlarging the diameter of the end part of a pipe stock, forming the section by an oblong punch into an oblong shape and, further, by a spectacle punch into a spectacle shape. CONSTITUTION:In a 1st stage, a diameter enlarging punch is forced into the end part of the pipe stock to enlarge the diameter of the end part. In a 2nd stage, the oblong punch is forced into the diameter enlarged end part to form the section of the end part of the pipe stock into the nearly oblong shape. Further, in a 3rd stage, a spectacle punch having a plunging part fitted into a small circle of the end part and provided with a rolling roller to roll the central part of the outside of the oblong shape the inside is plunged in to form the end part of the pipe stock nearly into the shape of spectacles. By this method, operators are reduced, the manhour is decreased and the productivity can be improved.

Description

[Detailed Description of the Invention] [Object of the Invention] 1. The present invention provides a pipe end processing method and apparatus for forming the end portion of a pipe material into a cross-sectional spectacle shape in multiple stages around the same processing axis. and a glasses punch used therein.

Conventional rawhide board Conventionally, when processing a branch pipe for piping, the end of a cylindrical pipe material has a cross-section shaped like a bean paste as shown in FIG. 15.The end of the pipe material shown in FIG. The first special machine is used to enlarge the diameter, then the second special machine is used to make the cross section approximately elliptical, and the third special machine is used to press-form it using upper and lower molds. However, with this method, each dedicated machine is required, and a worker must be assigned to each dedicated machine to process it, and the pipe material must be transported and positioned between each dedicated machine. Not,
It is extremely troublesome and therefore requires a great deal of labor, and cannot be used to save labor.Furthermore, the molding process using the upper and lower molds requires precision in the mold itself, so it is very expensive. Although it had some disadvantages, I decided to solve it.
In the present invention, the pipe material is clamped and fixed in one place, and the pipe material is successively formed in multiple stages with respective forming punches sequentially positioned on the same axis as the machining axis of the end portion of the pipe material. By molding, there is no need for a dedicated machine for processing each process, and the process of transporting and positioning the pipe material between each dedicated machine can be eliminated, so they are placed in each dedicated machine. A pipe end processing method, device, and its use that can significantly reduce the number of workers and achieve labor savings, and also improve productivity by eliminating upper and lower molds that require precision. The aim is to provide a glasses punch that can

[Structure of the invention]

In view of the above, the present invention is a processing method for forming the end portion of a pipe material into a substantially glasses-shaped cross section using a die and a punch, the diameter expanding punch being inserted into the end portion of the pipe material. A first step of at least expanding the diameter of the end portion of the pipe material;
Next, a second step of making the end portion of the pipe material have a substantially elliptical cross section by inserting an oblong punch into the diameter-enlarged end portion; The end portion of the pipe material is shaped into a substantially eyeglass-shaped cross section by inserting a spectacle punch having a protruding portion that is inserted into the small circle of the end portion and having a pressing roller that rolls the center portion of the outer side of the oblong inward. A pipe end processing method in which the third step of forming the mold is carried out on the same processing axis, and a mold die including a fixed die and a movable die is arranged on one side of the processing axis of the base. A slide body is disposed in front of the mold die to allow the punch press shaft to freely move forward and backward in the direction of the processing axis, and a large number of slide bodies are mounted in parallel at predetermined intervals. A diameter punch, an elliptical punch, and a boxed punch having a protruding part and a pressing roller are respectively attached, and a fitting part is formed at the rear end, and the axis of the punch pressing shaft is adjusted to correspond to the processing process. In step 7, a positioning mechanism that can be positioned perpendicularly to the processing axis is connected to the slide body in order to align it with the processing axis, and - the punch cylinder, which can be freely moved toward and away from the punch pressing shaft of everyone, is pressed toward the mold die side. A pipe end processing device is placed on the other side of the processing axis of the base to achieve the desired results.
Further, a mounting part is formed in the front part of the base having the fitting part in a bulging shape from the base, and a cylindrical protrusion part is formed parallel to the front with a predetermined interval at the left and right positions of the center of the mounting part. The upper support body and the lower support body are made to extend forward in parallel with a predetermined interval above and below the center of the mounting part,
The present invention attempts to solve the above-mentioned drawbacks by providing a spectacle punch in which a pressing roller is pivotally supported at a front portion between the upper and lower supports at a predetermined interval in the vertical direction.

±− beans In the present invention, by having the above configuration,
The movable die is moved to the fixed die side, and the pipe material is clamped and fixed between the fixed die and the movable die.

Next, a positioning mechanism connected to the slide body is used to position the punch press shaft on which the diameter expanding punch is attached so that the axis of the punch press shaft coincides with the processing axis.

Then, the rear end of the punch press shaft and the punch cylinder are connected, and in this state, by pressing the punch cylinder toward the mold die side, the diameter expansion punch of the punch press shaft is applied to the end of the pipe material. This is the first step of expanding the diameter of the end portion of the pipe material.

Next, align the oval punch of the punch press shaft with the machining axis center.
．． In the second step, the end portion of the pipe material is formed into a substantially elliptical cross-section by positioning the end portion of the pipe material in the same way as the first step so that the end portion of the pipe material is inserted into the end portion of the pipe material using a punch cylinder. Next, the spectacle punch of the punch pressing shaft is positioned in the same way as in the first step so that it coincides with the machining axis, and then the protruding part of the spectacle punch is shaped into the approximately elliptical cross section. It is fitted into the inside of a small circle at the end of the pipe material formed into the pipe material to prevent deformation of the small circle shape, and at the same time, the center part of the outside of the long circle is rolled inward using a pressure roller to create a cross-sectional shape. It is molded into the shape of glasses.

An embodiment of the present invention will be described below based on the drawings. 1 is a main body of a vibrator end processing device, and the main body 1 includes a workpiece loading section 2, a workpiece holding section 3, a punch switching section 4, and a punch pressing section. 5.

First, the workpiece loading section 2 will be described. 6 is a workpiece guide member formed into a block shape with a guide groove 7 for receiving a stepped cylindrical pipe material W cut to a predetermined size. The guide member 6 is the table 9 of the base 8
The mounting section 7 is positioned and fixed at the upper front side part and at the processing axis x-X in the left-right direction of the base 8. On the other hand, the upper surface of the mounting plate 10 is placed on one side of the work guide member 6. Machining axis X-
The height is made to be approximately the same as that of X, and the front end portion is made to approximately coincide with the machining axis XX and is fixed horizontally.

Reference numeral 11 denotes a workpiece pushing device, and the workpiece pushing device 11 has a cylinder 12 arranged horizontally on the rear side of the R placement plate 10, that is, in a direction perpendicular to the machining axis XX, and Pushing member 1 that slides on the upper surface of the plate lO
3 is attached to the tip of the rod 14.

15 is a stopper, and the stopper 15 is attached to the mounting plate 1.
0, that is, at a position opposite to the tip of the pushing member 13 of the pushing device 11, it protrudes from the top surface of the mounting plate 10 and is swingable so as to be able to come into contact with and separate from the front end of the mounting plate 10. It is set up.

Reference numeral 16 denotes a chute having a V-shaped cross-section. It is connected to a predetermined position on one side of the placing plate 10.

18 is a sensor, and the sensor 18 is connected to the chute 16.
The state in which the tip of the pipe material W being discharged is contacted is detected, and the workpiece pushing device 'ij 11 is controlled.

Reference numeral 19 denotes a workpiece insertion device, and the workpiece insertion device 19 has a guide rod 2 attached to a holding member 20 fixed to the upper part of the workpiece guide member 6 so as to be parallel to the machining axis X-X.
1.21a are cantilever-supported and extended to one side of the base 8 and arranged horizontally, and the guide rods 2
The guide rod 22 is slidably supported by the holding member 20 between 1.21a, that is, coaxially above the machining axis XX, and is formed into a substantially T-shape with a protruding piece 23 that protrudes downward. The sliding body 24 is moved to the guide rod 21.21a.
At the same time, one end of the guide rod 22 is fixed to the sliding body 24, and the guide rod 2
The other end of the guide rod 22 is fixed to the tip of the rod 26 of the cylinder 25 which is arranged in parallel with the cough guide rod 22 above the cough guide rod 22, and the work guide member 6 is fixed to the end of the protruding piece 23 of the slider 24. The insertion rod 27 is fixedly configured so as to extend toward the guide groove 7 and to be coaxial with the machining axis XX.

Next, the work holding part 3 will be explained. Reference numeral 28 is a mold die, and the mold die 28 is fixed on the table 9 with the base 29 brought close to the other side of the work guide member 6. A fixed part 31 to which the fixed die 30 is mounted is provided at the front part, and a movable part 33 to which the movable die 32 is mounted is provided at the rear of the base 29 facing the fixed part 31 so as to be slidable toward the fixed part 31. It is configured.

34 is a driving device, and the driving bag? v34 is the movable part 33
Furthermore, a support 35.35a is erected at a predetermined distance at a rear position, and the head 37 of the cylinder 36 is pivotally supported by the support 35.35a, and a link mechanism 39 is attached to the tip of the rod 38 of the cylinder 36. It is configured to be connected to the movable part 33 via.

In addition, 40 is a fixed die 30 and a movable die 32,
This sensor detects the state in which the pipe material W is clamped and fixed.

Reference numeral 41 denotes a stopper, and the stopper 41 is located in front of the mold die 28 in the workpiece insertion direction and is configured to move forward and backward on the processing axis X-X at a position opposite to the tip of the insertion rod 27 of the workpiece insertion device 19. It is attached to the tip of the loft 43 of the cylinder 42 which is appropriately arranged.

Reference numeral 44 denotes a work release part, and the work release part 44 is appropriately arranged so as to release the pipe material W fixed to the fixed die 30 or the movable die 32 or the pipe product Z after processing. An abutting member 47 is attached to the tip of the rod 46 of the cylinder 45.

Next, the punch switching section 4 will be explained. 48 is a punch mounting section, and the machining axis X-
A guide rail 49 is disposed in a direction perpendicular to X, and a linear guide 50 is slidably mounted on the guide rail 49, and a punch mounting portion 51.51a is provided on the top of the linear guide 50 at the tip.・In addition to providing
A large number of punch press shafts 53, 53a with fitting portions 52, 52a, . A slide body 54 is attached to the slide body 54.

Reference numeral 55 denotes a positioning mechanism. The positioning mechanism 55 forms serrated grooves 57 at predetermined intervals on a long piece of the plate 56 formed into a substantially rectangular shape, and uses the rising portions of the grooves 57 as positioning surfaces. 58, 58a... and the inclined parts 60, 60 through the flat parts 59, 59...
A... is formed, and a positioning member 61 is formed that makes the flat portions 59, 59..., inclined portions 60, 60a... a sliding surface, and the positioning member 61 is attached to the slide body 54. A positioning pin 64 is attached to the lower part of one side so that the groove part 57 faces downward, and a positioning pin 64 having a locking surface 62 and a radiused sliding surface 63 formed at the tip is installed at a position facing downward from the groove part 57. It is fixedly attached to the lower part of the table 9 and attached to the tip of the roller 6 of the cylinder 65, so that it can freely rise upward from the upper surface of the table 9.

67 is a drive device, and this drive device 67 is the slide body 5
A cylinder 6 that connects the tip of a rod 68 to the rear end of 4.
9 on the table 9, and the cylinder 6
Sensor 70.70a for detecting the moving position of 9.
. . are arranged on the cylinder 69 at predetermined intervals.

In the figure, 71 is a clip ball, 72 is a spring that presses the clip ball 71, 73 is a recess that fits into the clip ball 71, and 74 is a punch pressing shaft 53, 53a...
A concave groove 75 is a stopper inserted into the concave groove 74 to restrict sliding.

Next, the punch pressing section 5 will be explained. 76 is a punch cylinder, and the punch cylinder 76 is positioned on the machining axis XX, and the punch pressing shafts 53, 53a, . . . are attached to the tip of the rod 77. Fitting part 52.52a
A connecting part 79 formed with a fitting part 78 that can be freely moved into and out of contact with the
is attached, and the connecting portion 79 is arranged so as to be pressed toward the mold die 28 side.

In addition, 80 is a stroke part of the punch cylinder 76 having eight circumferences.

Next, to explain the punch used for pipe end processing, 81 is a diameter expanding punch used in the first step, and the diameter expanding punch 81 is inserted into the inner diameter of the pipe material W to enlarge the diameter. A tapered surface 82 is formed at the tip, and a cylindrical protruding portion 83 having a predetermined diameter is formed continuously from the tapered surface 82, and a punch pressing shaft 53, 53a... is formed at the base. A fitting portion 84 that fits into the punch mounting portion 51 is formed.

Reference numeral 85 denotes an oval punch used in the second step, and the base of the oval punch 85 is formed in the same manner as the base of the diameter expanding punch 82, and a tapered surface 86 is formed at the front end of the base. At the same time, an elongated protruding portion 87 having a predetermined diameter is formed continuously from the tapered surface 86.

Reference numeral 88 designates an eyeglass punch used in the second step, and the base of the eyeglass punch 88 is formed in the same manner as the bases of the enlarged diameter punch 81 and the oval punch 85, and a mounting portion 89 is bulged from the base. A cylindrical protrusion part 91 formed at the front part of the base, and having a predetermined diameter and having a tapered surface 90 at the distal end, with a predetermined interval at the left and right positions of the center of the mounting part 89.
．． The upper support member 92.
92a and the lower support 93.93a extend forward in parallel, and an outer peripheral portion 95.95a of the pressure roller 94.94a is disposed in front between the upper support 92.92a and the lower support 93.93a. They are pivotally supported with a predetermined interval between them.

In this embodiment, in order to reduce the stress burden on the material W, the diameter expanding punch 81 has two types of outer diameters.

Next, to explain the operation of the pipe end processing device and the eyeglass punch according to the present invention, the pipe material W discharged from the discharge port 17 of the parts feeder is transferred and placed on the mounting plate 10 by the chute 16, and the tip of the pipe material W is A stopper 15 is provided at the tI edge of the mounting plate 10 so that the cylinder 12 of the workpiece pushing device 11, which is controlled by the sensor 18, is actuated to push the pipe material W through the pushing member 13. At this time, the stopper 15 swings in the pushing direction, thereby fixing the pipe material W between the stopper 15 and the front edge of the mounting plate 10.

Next, the work insertion device? By activating the cylinder 25 of +F19 and moving the sliding body 24 connected to the cylinder 25 toward the mold die 28, the sliding body 2
At the tip of the insertion rod 27 attached to the protruding piece 23 of No. 4, the pipe material W is inserted through the work guide member 6 until it comes into contact with the stopper 41 disposed in front of the mold die 28. At this time, mold die 2
The movable die 32 of No. 8 is in a detached state from the fixed die 30.

Then, the movable die 32 is moved toward the fixed die 30 side by the driving device w34, and the fixed die 30 and the movable die 32 are moved.
The pipe material W is clamped and fixed at the 7.

Next, move the slide body 5 so that the axis of the punch press shaft 53 on which the diameter expansion punch 81 is attached is aligned with the machining axis X-X.
Move the sliding surface of the positioning member 61, which is the positioning mechanism 55 linked to the upper part 1-7 of the cylinder, to the position opposite to the positioning pin 64, that is, to the position set by the sensor 70. 69 is activated and positioned, and in this state, the positioning pin 64 is moved upward, and then the cylinder 69 is moved as described above so that the locking surface 62 of the positioning pin 64 and the positioning surface 58 of the positioning member 61 are brought into contact with each other. It operates in the opposite direction to the operating direction to position it.

Then, the fitting part 52 at the rear end of the punch press shaft 53 and the connecting part 79 of the punch cylinder 76 are connected, and in this state, the punch cylinder 76 is connected to the mold die 2.
By pressing toward the 8 side, the diameter expanding punch 81 of the punch press shaft 53 is forced into the end portion of the pipe material W, thereby completing the first step of expanding the diameter of the end portion of the pipe material W. .

Next, for the second process, the oval punch 85 of the punch press shaft 53 is positioned in the same manner as the first process so as to match the machining axis X-X, and the oval punch 85 is
The end portion of the pipe material W is forced into the end portion of the pipe material W by the punch cylinder 76, thereby forming the end portion of the pipe material W into a substantially oval shape in cross section.

Next, for the third step, the eyeglass punch 88 of the punch press shaft 53 is positioned in the direction opposite to the first step so as to match the machining axis XX, and then the plunger 91 of the eyeglass punch 88 .91a is fitted into the inside of the small circle of the end portion of the pipe material W formed into a substantially oval cross section using the punch cylinder 76 to prevent deformation of the small circle shape, and the center portion of the outside of the oval is pressed by a roller. 94.94a
The material is then rolled inward to form a cross-section that is approximately eyeglass-shaped.

Next, when taking out the molded pipe product Z, the movable die 32 of the mold die 28 is separated from the fixed die 30, and in this state, the movable die 32 is removed from the fixed die 30.
Or the vibrator product Z fixed to the fixed die 30
By colliding with the abutting member 47 of the workpiece release part 44, the fixed state is released and the workpiece falls into the opening 96 provided directly below, and is stored in a predetermined position via the workpiece ejection shade 97. be.

〔Effect of the invention〕

In short, the present invention enables pipe material W to be formed using a die and a punch.
A processing method for forming the end portion of the pipe material W into a substantially glasses-shaped cross section, the first step being to insert a diameter expanding punch 81 into the end portion of the pipe material W to enlarge the diameter of the end portion of the pipe material W; Then, an oblong punch 85 is applied to the end portion whose diameter has been expanded.
a second step of making the end portion of the pipe material W have a substantially elliptical cross section by inserting the end portion 91., and further inserting the plunger portion 91. 91a
and a press roller 94.94a for rolling the central part of the outer side of the oval inward.
The third step of making the end portion of the pipe material W have a substantially spectacle-shaped cross section by inserting the pipe material W into the molding process is carried out at the same processing axis X-X, so that the fixed die 30 and the movable die 3
2, the end of the pipe material W is clamped and fixed in one place at the processing axis X-X, and the same processing axis X- as the end of the pipe material W is formed.
Diameter expanding punches 81, which are respective forming punches, are positioned at the processing axis X-X by the positioning mechanism 55 sequentially at X;
By performing the forming process in multiple stages using the oval punch 85 and the spectacle punch 88, it is no longer necessary to use dedicated machines that were conventionally installed for each process, and the work of transporting the pipe material W between the dedicated machines is simplified. Since the positioning and positioning work can be eliminated, the number of workers assigned to each dedicated machine can be significantly reduced, and everything from loading the pipe material W to the mold die 28 to the third process can be automated. This makes it possible to make the end portion of the pipe material W into a substantially glasses-shaped cross section unmanned, thereby contributing to labor savings.

Further, a mounting part 89 is formed in the front part of the base having the fitting part 84 in a bulging shape from the base, and a cylindrical protruding part 91. 91
The lower supports 92.9 extend forward in parallel and are spaced apart from each other at a predetermined distance above and below the center of the mounting portion 89.
2a and the lower support 93.93a extend forward in parallel, and a pressure roller 94.94a is placed in the front part between the upper support 92.92a and the lower support 93.93a at a predetermined interval in the vertical direction. Since the eyeglass punch 88 is formed by pivotally supporting the eyeglass punch 88, the eyeglass punch 88 of the punch pressing shaft 53 is positioned so as to match the machining axis XX, and then the protrusion portion 91.91a of the eyeglass punch 88 is formed. is fitted into the inside of a small circle at the end of the pipe material W, which is formed into a substantially elliptical cross-section, and the central part of the outside of the ellipse is rolled inward by pressure rollers 94 and 94a.
By simply pushing the end portion of the pipe material W, it is possible to prevent the plunge portion 91.91a from being deformed into a small circular shape, and it is also rolled and formed by the pressure roller 94.94a into a shape with a cross section that is approximately like a pair of glasses. It can be formed with a simple structure, and the conventional precision upper and lower press molds are no longer required, so the processing process for forming the end of the pipe material W into a roughly glasses-shaped cross section can be done with the Galoe axis X- The practical effects of this method, such as being able to construct a pipe end processing method and apparatus as described above which can be carried out in multiple stages using X, are enormous.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view of the pipe end processing device according to the present invention, FIG. 2 is a plan view of the same, and FIG. 4 is a sectional view taken along line BB in FIG. 2, FIG. 5 is a view taken along line C-C in FIG. 2, and FIG. 6 is a view taken along line DD in FIG. 2. Figure 7 is a side view of the eyeglass punch, Figure 8 is a front view of the same as above, Figure 9 is a plan view of the same as above, Figure 10 is a side view of the enlarged diameter punch, Figure 11 is a side view of the oval punch, and Figure 12 is a side view of the oval punch. Figures 1 through 15 are perspective views showing the processing steps for the pipe material. 81 Expanding diameter punch 84 Fitting part 88 Eyeglass punch 89 Mounting part 94.94a Pressure roller 93.93a Lower support 8S Oval punch 91.91a Intrusion part 92.92a Upper support Applicant Osgar Machine Co., Ltd. Section 4 Figure 6 Figure 5 Figure 1 O Figure 12 Figure 14? Figure 13

Claims (3)

[Claims] (1) A processing method in which the end portion of a pipe material is formed into a substantially glasses-shaped cross section using a die and a punch, and the diameter of the end portion of the pipe material is expanded by inserting a diameter expanding punch into the end portion of the pipe material. a first step of tightening the pipe material, a second step of inserting an oblong punch into the diameter-enlarged end portion to make the end portion of the pipe material have a substantially elliptical cross-section; The end of the pipe material is punched by inserting a box punch, which has a protruding part that is inserted into the small circle of the elliptical end part and is equipped with a pressure roller that rolls the center part of the outside of the ellipse inward. A pipe end processing method, characterized in that the third step of forming the section into a substantially spectacle-shaped section is performed on the same processing axis. (2) A mold die including a fixed die and a movable die is arranged on one side of the processing axis of the base, and the punch press shaft is moved forward and backward in the direction of the processing axis at a position in front of the mold die. A spectacle punch is provided with a plurality of slide bodies attached in parallel at predetermined intervals, and has an enlarged diameter punch, an oblong punch, and a protruding part at the tip of a punch pressing shaft, and is equipped with a pressure roller. At the same time, a fitting portion is formed at the rear end, and a positioning mechanism is provided that can freely position the punch pressing shaft in a direction orthogonal to the processing axis in order to align the axis of the punch pressing shaft with the processing axis in accordance with the processing process. A punch cylinder connected to the slide body and movable toward and away from each punch pressing shaft is arranged on the other side of the processing axis of the base so as to press it toward the die side of the mold. Pipe end processing equipment. (3) A mounting part is formed in the front part of the base having the fitting part in a bulging shape from the base, and a cylindrical protruding part is parallel to the front with a predetermined interval between the left and right positions of the center of the mounting part. The upper support body and the lower support body are made to extend forward in parallel with a predetermined interval above and below the center of the mounting part, and the front part between the upper support bodies and between the lower support bodies is A glasses punch characterized in that the pressure rollers are pivotally supported at a predetermined interval in the vertical direction.