CN112247227B - A die base assembly in a chip needle, a clamping body and a processing method thereof - Google Patents

Abstract

The invention discloses a sheet needle middle die assembly, a clamping body and a processing method thereof, comprising N layers of sheet needle middle moulds with the same structure stacked in sequence; Two outer surfaces; the circumference of the first outer surface is provided with at least two connection pins 11 , and the second outer surface is provided with connection holes 12 for inserting the connection pins 11 at positions corresponding to the connection pins 11 respectively. According to the needs of production, the needle center die assembly can be structurally split into N layers of the needle center mold that are stacked in sequence from top to bottom. The thickness of each layer of the needle center mold is equal to 1/N, when machining with a CNC milling machine, the required size and length of the milling cutter is 1/N of the thickness of the chip needle middle mold assembly; compared with the integrated chip needle middle mold assembly in the prior art, the layered It is less difficult to process and is suitable for CNC milling machine washing processing, so the processing time is short, which can meet the needs of mass production, and does not require mold opening, and the manufacturing cost is low.

Description

A kind of mold seat assembly, clamp body and processing method in the needle

technical field

The invention relates to the field of sheet needle middle mold processing, in particular to a sheet needle middle mold assembly, a clamp body and a processing method thereof.

Background technique

In the conventional technology, the processing technology of the middle mold assembly of the needle needle is completed by opening the mold. The structure size of the spacer in the middle mold assembly of the needle needle is small, which requires high precision of the mold, and the mold opening cycle is long, so the quantity cannot be achieved. production needs.

At present, in order to solve the problems caused by mold opening and production in the existing technologies on the market, CNC (numerical control milling machine) milling is used to improve production efficiency, but limited by the structural size of the spacer, the size requirements for milling tools are relatively high. High, for example, the thickness of the middle mold assembly of the conventional needle needle is 3MM, and the width of the spacer is 0.1MM, but there is no specification size of 0.1*3MM in the existing milling cutters on the market, which makes it difficult to realize CNC machining.

In view of this, it is necessary to improve the processing technology of the sheet needle middle mold assembly in the prior art to solve the problem that the CNC processing method is not difficult to implement.

Contents of the invention

The object of the present invention is to provide a middle mold assembly of a needle needle, a clamp body and a processing method thereof, so as to solve the above problems.

For reaching this purpose, the present invention adopts following technical scheme:

A needle middle die assembly, comprising sequentially stacked N layer middle dies with the same structure, where N is a positive integer greater than 1;

The needle middle mold includes a first outer surface and a second outer surface distributed along the stacking direction;

At least two connecting pins are provided on the periphery of the first outer surface, and connecting holes for inserting the connecting pins are respectively provided on the second outer surface at positions corresponding to the connecting pins.

Optionally, the connection pins of the middle dies of the needles are connected with the connection holes of the middle dies of the adjacent needles through an interference fit.

Optionally, the top surface of the connection pin is provided with a vent hole communicating with the connection hole, and the vent hole is used to discharge the excess air pressure in the connection hole.

Optionally, a processing groove is opened on the first outer surface, an avoidance groove communicating with the processing groove is opened on the second outer surface, and a plurality of grooves communicating with the processing groove are separated from the edge of the processing groove. Spacers of the grooves, spacers are formed between adjacent spacers, and the spacers and spacers form the spacer part of the middle mold of the needle needle.

Optionally, the needle middle mold assembly includes three layers of the needle middle mold stacked in sequence.

The present invention also provides a clamping body for the middle die assembly of the blade needle, which is used for processing the middle die assembly of the blade needle, including a body, and the top surface of the body is provided with a locating pins for parts;

The top of the body is respectively provided with a number of jacking holes on the opposite sides of the positioning pin, and a ejector rod is arranged in the jacking hole, and a push block is connected to the bottom end of the ejector rod, and the push block A rotating rod is provided on a side away from the ejector rod, and a pushing groove adapted to the pushing block is opened on the outer wall of one end of the rotating rod, and the pushing groove radially penetrates the rotating rod. rod grooves;

When the push block is accommodated in the push groove, the ejector rod does not protrude from the jacking hole, and the rotating rod is rotated, and the rotating rod continuously pushes the pusher during rotation. block, move the push block towards the opening of the jacking hole until the end of the ejector rod away from the push block sticks out of the jacking hole, and insert the needle into the module The piece is pushed away from the positioning pin.

Optionally, one end of the rotating rod protrudes from the body and is connected with a rotating handle.

The present invention also provides a processing method for the middle mold assembly of the needle needle, adopting the above-mentioned clamping body of the middle mold assembly of the needle needle, comprising:

Step 1: Take N blanks, and mill the N blanks with a CNC milling machine to obtain N blanks of the middle mold of the needle, the blank of the middle mold of the needle is the unprocessed spacer said sheet needle middle mold of the sheet portion and the vent hole;

Step 2, processing vent holes on the connecting pins of the primary blank of the middle mold of the needle by a numerical control milling machine, so as to obtain the secondary blank of the middle mold of the needle;

Step 3: Take a secondary blank of the middle mold of the needle, align the connecting hole of the secondary blank of the middle mold of the needle with the positioning pin of the clamp body, and position the secondary blank of the middle mold of the needle on said clamp body;

Step 4, the numerical control milling machine processes the processing groove of the secondary blank of the middle mold of the needle to form a spacer part of a predetermined shape, and obtains the third blank of the middle mold of the needle;

Step 5, deburring the septa of the tertiary blank of the needle middle mold to obtain the first piece of needle middle mold;

Step 6, take another secondary blank of the middle mold of the sheet needle, align the connecting hole of the secondary blank of the middle mold of the needle needle with the connecting pin of the first piece of the middle mold of the needle needle, and place the sheet The secondary blank of the needle mold is positioned on the first outer surface of the needle mold of the first piece;

Step 7, perform steps 4 and 5 to obtain the second piece of needle mold;

Steps 6 and 7 are repeated N-2 times to prepare the sequentially stacked N-layer needle dies.

Optionally, after the seventh step, it also includes:

Step 8: Rotate the rotating handle, the ejector rod is ejected from the jacking hole, and the middle mold of the needles of the N layers is pushed out of the positioning pin, and the outer mold of the needles of the N layers is carried out. The surface is deburred to form a needle mold assembly.

Optionally, the spacer part includes a plurality of spacers formed at predetermined positions; the plurality of spacers are arranged at intervals;

After the eighth step, it also includes:

Step 9: Carry out precision inspection on the needle middle mold assembly, and judge whether the positional deviation of the spacers of the needle middle mold assembly is within the range of -0.005 to +0.005mm;

If not, it is judged that the middle mold assembly of the sheet needle is a substandard product;

If so, it is judged that the middle mold assembly of the sheet needle is a qualified product.

Compared with the prior art, the present invention has the following beneficial effects: According to the production needs, the needle mold assembly can be structurally disassembled into N-layer needle molds stacked sequentially from top to bottom, each layer The thickness of the needle middle mold is 1/N of the thickness of the piece needle middle mold assembly. When using CNC milling machine to process, the required size and length of the milling cutter is 1/N of the thickness of the piece needle middle mold assembly; compared with the existing The one-piece needle middle mold assembly in the technology, the layered needle middle mold assembly is less difficult to process, suitable for milling on CNC milling machines, so the processing time is short, it meets the needs of mass production, and there is no need to open the mold , low manufacturing cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, Without technical substantive significance, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the technology disclosed in the present invention without affecting the effect and purpose of the present invention. within the scope of the content.

Fig. 1 is a structural schematic diagram of a mold assembly in a sheet needle;

Fig. 2 is a top view structural schematic diagram of the middle mold assembly of the sheet needle;

Fig. 3 is a schematic cross-sectional structure diagram of the middle mold assembly of the sheet needle;

Fig. 4 is the structural representation of folder body;

Fig. 5 is a partial sectional structural schematic diagram of the clip body;

Fig. 6 is a schematic diagram of the structure of the blade middle mold assembly installed on the clamp body.

Illustration: pin middle mold assembly 1, processing groove 13, escape groove 14, spacer part 15, spacer 151, connecting pin 11, connecting hole 12, vent hole 16, clamp body 2, body 21, positioning Pin 22, jacking rod 23, push block 24, rotating rod 25, pushing groove 26, rotating handle 27, jacking hole 28.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner" and "outer" are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a centered component at the same time.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Embodiment one:

Embodiment 1 of the present invention provides a needle middle mold assembly, which includes sequentially stacked N layers of needle middle molds with the same structure, where N is a positive integer greater than 1;

The needle middle mold includes a first outer surface and a second outer surface distributed along the stacking direction; combined with schematic diagram 1, wherein, the first surface is the top surface of the middle needle mold shown in the figure, and the second surface is the middle needle mold shown in the figure. the bottom surface of the die;

At least two connecting pins 11 are provided on the periphery of the first outer surface, and connecting holes 12 for inserting the connecting pins 11 are respectively provided on the second outer surface corresponding to the positions of the connecting pins 11 .

During work, according to production needs, the sheet needle middle mold assembly 1 can be structurally disassembled into N layers of sheet needle middle molds stacked sequentially from top to bottom, and the thickness of each layer of sheet needle middle molds is 1/N of the thickness of the component 1, when using a CNC milling machine, the size and length required by the milling cutter is 1/N of the thickness of the die component 1 in the sheet needle; compared with the integrated sheet needle in the prior art Die assembly 1, the layered needle-mold assembly 1 is less difficult to process and is suitable for milling on a CNC milling machine. Therefore, the processing time is short, meeting the needs of mass production, and there is no need to open the mold, and the manufacturing cost is low.

In this embodiment, the connection pin 11 of the middle die of a needle is connected with the connection hole 12 of the middle die of an adjacent needle by interference fit.

Further, the top surface of the connecting pin 11 is provided with an exhaust hole 16 communicating with the connecting hole 12, and the exhaust hole 16 is used to discharge the interference air pressure in the connecting hole 12, so as to prevent the mold from interfering with the needle when stacking. The air pressure deforms or bulges the connecting pin 11, which improves the stability of the structure.

Preferably, the needle core mold assembly 1 includes three layers of needle core molds stacked sequentially from top to bottom. The thickness of the conventional piece needle middle mold assembly 1 is 3MM, and the thickness of the single piece needle middle mold is 1MM. Therefore, it can be seen that during CNC machining, the maximum feed depth of the milling cutter is 1MM. As a preferred solution, the depth of the escape groove 14 The setting is 0.5MM, the difficulty of CNC machining is low, and the time consumption is short.

Embodiment two:

Embodiment 2 of the present invention provides a clamping body 2 of a needle middle mold assembly, which is applied to process the middle needle mold assembly 1 as in the first embodiment above, including a body 21, and the top surface of the body 21 is provided with a useful Locating pin 22 of mold assembly 1 in the positioning piece needle;

The top of the body 21 is respectively provided with a number of jacking holes 28 on the opposite sides of the positioning pin 22, and the ejector rod 23 is arranged in the jacking hole 28, and the bottom end of the ejector rod 23 is connected with a push block 24, and the push block 24 is far away from the top. One side of the output rod 23 is provided with a rotating rod 25, and the outer wall of one end of the rotating rod 25 is provided with a pushing groove 26 adapted to the push block 24, and the pushing groove 26 is a groove that runs through the rotating rod 25 radially;

When the push block 24 was accommodated in the push groove 26, the ejector rod 23 did not stretch out the jacking hole 28, and the rotating rod 25 was rotated, and the rotating rod 25 constantly pushed the push block 24 during the rotation, so that the push block 24 moved toward The orifice direction of the jacking hole 28 moves until the end of the ejector rod 23 away from the push block 24 stretches out of the jacking hole 28 , and the needle middle mold assembly 1 is pushed away from the positioning pin 22 .

One end of the rotating rod 25 protrudes from the body 21 , and a rotating handle 27 is provided at the extended end; when the rotating handle 27 is rotated, the jacking rod 23 moves linearly along the jacking hole 28 .

When milling the spacer part 15 of the pin middle mold assembly 1, the above-mentioned clamp body 2 is used to position and install the pin middle mold assembly 1, and each layer of the pin middle mold assembly 1 is sequentially The middle mold of the needle needle is milled to ensure the overall machining accuracy of the spacer part 15; when the middle mold assembly 1 of the needle needle needs to be removed, the rotating handle 27 is turned, and the jacking rod 23 moves linearly along the jacking hole 28, That is to say, the needle middle mold component 1 is separated from the clamp body 2, and the material taking is convenient and fast, and the practicability is good.

Embodiment three:

The present invention also provides a processing method for the middle mold assembly of the needle needle, adopting the clamping body 2 of the middle mold assembly of the needle needle as in the second embodiment, comprising:

Step 1: Take N blanks, and mill the N blanks with a CNC milling machine to obtain N blanks of the needle middle mold, which are the unprocessed spacer part 15 and the exhaust gas. The middle mold of the sheet needle with hole 16;

Step 2, process the exhaust hole 16 on the connecting pin 11 of the first blank of the middle mold of the sheet needle by a numerical control milling machine, so as to obtain the secondary blank of the middle mold of the sheet needle;

Step 3, take a piece of the secondary blank of the middle mold of the needle, align the connecting hole 12 of the secondary blank of the middle mold of the needle with the positioning pin 22 of the clamp body, and position the secondary blank of the middle mold of the needle on the clamp body 2;

Step 4, the CNC milling machine processes the processing groove 13 of the secondary blank of the middle mold of the needle to form a spacer part 15 of a predetermined shape, and obtains the third blank of the middle mold of the needle;

Step 5, deburring the septum portion 15 of the tertiary blank of the needle middle mold to obtain the first piece of needle middle mold;

Step 6, take another secondary blank of the needle middle mold, align the connecting hole 12 of the secondary blank of the middle mold of the needle needle with the connecting pin 11 of the first middle mold of the needle needle, and place the secondary blank of the middle mold of the needle needle positioning the first outer surface of the die in the first sheet;

Step 7, perform steps 4 and 5 to obtain the second piece of needle mold;

Steps 6 and 7 are repeated N-2 times to prepare sequentially stacked N-layer needle molds.

Further, after Step 7 of this embodiment, it also includes:

Step 8: Rotate the rotating handle 27, eject the ejector rod 23 from the jacking hole 28, eject the middle mold of the N-layer needle from the positioning pin 22, and deburr the outer surface of the middle mold of the N-layer needle to form a needle Middle mold component 1; the clamp body in this embodiment is convenient and quick to take out materials, and has good practicability; compared with individual processing and then assembly, it avoids the accumulation of errors during assembly and meets the accuracy requirements.

Further, the spacer part 15 includes a plurality of spacers formed at predetermined positions; a plurality of spacers are arranged at intervals;

After step eight also include:

Step 9: Carry out precision inspection on the needle middle mold assembly 1, and judge whether the positional deviation of the spacers of the needle middle mold assembly 1 is within the range of -0.005 to +0.005mm;

If not, it is judged that the needle middle mold assembly 1 is a substandard product;

If so, it is judged that the middle mold assembly 1 of the needle needle is a qualified product.

When processing the middle mold assembly 1 of the needle needle, the middle mold of the needle needle is subjected to layered milling. It is positioned and installed on the clamp body 2, and the spacer part 15, which is difficult to process, is processed separately to ensure the machining accuracy of the spacer part 15, and then the milling process of the spacer part 15 in the middle mold of N-1 pin needles is carried out in sequence ; The needle middle mold assembly 1 is finally formed, and the whole process is milled by a CNC milling machine. The processing time is short, which meets the needs of mass production, and does not require mold opening, and the manufacturing cost is low.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (5)

1. The fixture body of the sheet needle middle mold assembly is characterized in that the sheet needle middle mold assembly comprises N layers of sheet needle middle molds with the same structure which are sequentially stacked, wherein N is a positive integer greater than 1;

the middle mold of the sheet needle comprises a first outer surface and a second outer surface which are distributed along the stacking direction;

at least two connecting pins (11) are arranged on the periphery of the first outer surface, and connecting holes (12) for inserting the connecting pins (11) are respectively arranged on the second outer surface corresponding to the positions of the connecting pins (11);

the fixture body comprises a body (21), and a positioning pin (22) for positioning the middle die assembly (1) in the film needle is arranged on the top surface of the body (21);

the top of the body (21) is provided with a plurality of jacking holes (28) on two opposite sides of the positioning pin (22), each jacking hole (28) is internally provided with a jacking rod (23), the bottom end of each jacking rod (23) is connected with a pushing block (24), one side of each pushing block (24) far away from the corresponding jacking rod (23) is provided with a rotating rod (25), the outer side wall of one end of each rotating rod (25) is provided with a jacking groove (26) matched with the corresponding pushing block (24), and each jacking groove (26) is a groove radially penetrating through the corresponding rotating rod (25);

when the pushing block (24) is accommodated in the pushing groove (26), the pushing rod (23) does not extend out of the jacking hole (28), the rotating rod (25) is rotated, the rotating rod (25) continuously pushes the pushing block (24) in the rotating process, the pushing block (24) moves towards the orifice direction of the jacking hole (28), until one end, far away from the pushing block (24), of the pushing rod (23) extends out of the jacking hole (28), and the middle die assembly (1) of the sheet needle is pushed away from the positioning pin (22).

2. The fixture body of the middle die assembly in a film needle as claimed in claim 1, wherein one end of the rotating rod (25) extends out of the body (21) and is connected with a rotating handle (27).

3. A method for processing a mold assembly in a slice needle, which is characterized in that the clamp body of the mold assembly in a slice needle according to any one of claims 1 to 2 is adopted, a processing groove (13) is formed on the first outer surface, an avoiding groove (14) communicated with the processing groove (13) is formed on the second outer surface, a plurality of spacer gaps communicated with the processing groove (13) are formed at intervals on the groove edge of the processing groove (13), spacers (151) are formed between the adjacent spacer gaps, and the spacer (151) and the spacer gaps form a spacer part (15) of the mold in the slice needle; the method comprises the following steps:

taking N blank pieces, and milling the N blank pieces through a numerical control milling machine to obtain N piece of in-mold blank blanks in a piece needle, wherein the in-mold blank blanks in the piece needle are the in-mold blanks in the piece needle without processing the partition piece part (15) and the exhaust hole (16);

processing an exhaust hole (16) on a connecting pin (11) of the primary die blank in the die needle by a numerical control milling machine to obtain a secondary die blank in the die needle;

step three, taking a secondary blank in the middle die of the sheet needle, aligning a connecting hole (12) of the secondary blank in the middle die of the sheet needle with a positioning pin (22) of the clamp body, and positioning the secondary blank in the middle die of the sheet needle on the clamp body (2);

step four, processing a processing groove (13) of the secondary blank of the mold in the needle to form a spacer part (15) with a preset shape by a numerical control milling machine to obtain a tertiary blank of the mold in the needle;

fifthly, deburring is carried out on a spacer part (15) of the third blank of the middle die of the sheet needle to obtain a first middle die of the sheet needle;

taking another piece of the middle die secondary blank in the piece of the needle, aligning a connecting hole (12) of the middle die secondary blank in the piece of the needle with a connecting pin (11) of the middle die in the first piece of the needle, and positioning the middle die secondary blank in the piece of the needle on a first outer surface of the middle die in the first piece of the needle;

step seven, executing the step four and the step five to manufacture a middle mold of the second piece of the sheet needle;

and repeating the step six and the step seven for N-2 times to obtain the sequentially stacked N layers of the middle die of the needle chip.

4. The method for processing a mold assembly in a film needle as claimed in claim 3, wherein one end of the rotating rod (25) extends out of the body (21) and is connected with a rotating handle (27), and the seventh step is followed by further comprising:

step eight, rotating the rotating handle (27), ejecting the ejecting rod (23) from the ejecting hole (28), ejecting the positioning pin (22) out of the N layers of the film pins, and (3) carrying out outer surface deburring treatment on the N layers of middle dies of the film pins to form a middle die assembly (1) of the film pins.

5. The method of manufacturing a mold assembly in a needle according to claim 4, wherein the spacer portion (15) comprises a plurality of spacers formed at predetermined positions; a plurality of the spacers are arranged at intervals;

after the step eight, the method further comprises the following steps:

step nine, performing precision detection on the die assembly (1) in the film pin, and judging whether the position deviation of a spacer of the die assembly (1) in the film pin is within the range of-0.005 to +0.005 mm;

if not, judging that the die assembly (1) in the film needle is an unqualified product;

if yes, the middle die assembly (1) in the film pin is judged to be a qualified product.

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