CN112845875A

CN112845875A - Extrusion die

Info

Publication number: CN112845875A
Application number: CN202110028701.6A
Authority: CN
Inventors: 游太峰; 钱建芳
Original assignee: SUZHOU TONGXIN MACHINE FACTORY
Current assignee: SUZHOU TONGXIN MACHINE FACTORY
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-05-28

Abstract

The application relates to an extrusion die, its extrusion that is used for the work piece includes: the main die assembly comprises a main die sleeve which is hollow inside and provided with an opening at one end part and a core punching unit which is arranged in the main die sleeve in a floating mode and is abutted against the opening end of the main die sleeve, and the core punching unit is provided with a die cavity; the die assembly is arranged close to the opening end of the main die sleeve, an extrusion die cavity matched with the die cavity is arranged on the die assembly, and the aperture of the extrusion die cavity is smaller than that of the die cavity; the ejector pin assembly is arranged in the hollow cavity of the main die sleeve and is provided with a forming position and an ejecting position; the die assembly abuts against the core punching unit and pushes the core punching unit to move towards the side far away from the opening end, and the ejector pin assembly moves to the forming position in response to the movement of the core punching unit so that the workpiece is formed in a cavity formed by the surrounding of the cavity and the extrusion die cavity. In this way, extrusion die in this application passes through the main die subassembly and the components of a whole that can function independently sets up of die assembly, has the advantage that the machining precision is high, simple to operate.

Description

Extrusion die

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of dies, in particular to an extrusion die.

[ background of the invention ]

The scale of users consuming electronic products is continuously enlarged in the global range, and particularly, the popularization of various intelligent terminal products enables the downstream demand of the consumer electronic products to be continuously vigorous. At present, China becomes the manufacturing center of the world consumer electronics industry, in the prior art, most of brass electronic connecting needles are formed by extrusion, a workpiece is formed by extrusion in a cavity, the workpiece is completely separated from the cavity by ejector pins after the forming is finished, the contact area between the workpiece and the cavity is large, the surface of the formed workpiece is rough, the processing precision is low, the reject ratio is high, and the service life of an extrusion die can be influenced. Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

[ summary of the invention ]

The application aims to provide an extrusion die, which has the advantages of compact structure, high processing precision and convenience in installation.

The purpose of the application is realized by the following technical scheme: an extrusion die for extrusion molding of a workpiece, comprising: the main die assembly comprises a main die sleeve which is hollow inside and provided with an opening at one end part, and a core punching unit which is arranged in the main die sleeve in a floating mode and abutted against the opening end of the main die sleeve, wherein the core punching unit is provided with a die cavity for inserting a workpiece; the die assembly is arranged close to the opening end of the main die sleeve, an extrusion die cavity matched with the die cavity is arranged on the die assembly, and the aperture of the extrusion die cavity is smaller than that of the die cavity; the ejector pin assembly is arranged in a hollow cavity of the main die sleeve and can move along the axial direction of the main die sleeve, and the ejector pin assembly is partially inserted into the cavity; the ejector pin assembly is provided with a forming position and an ejecting position; when the main die assembly and the die assembly punch, the die assembly abuts against the core punching unit and pushes the core punching unit to move away from the open end side, and the ejector pin assembly moves to the forming position in response to the movement of the core punching unit so as to form the workpiece in a cavity formed by the surrounding of the die cavity and the extrusion die cavity; when the die assembly is separated from the main die assembly, the ejector pin assembly can move from the forming position to the ejection position, so that the formed workpiece is separated from the cavity.

Preferably, the die assembly comprises a die sleeve and a rod-contracting die arranged at one end of the die sleeve, the rod-contracting die is arranged close to the workpiece, and the rod-contracting die is provided with the extrusion die cavity.

Preferably, the extrusion die cavity comprises an arc area close to the die cavity and an extrusion area far away from the die cavity, and the extrusion area is in a contraction state compared with the arc area.

Preferably, the punch die sleeve is provided with a through cavity coaxial with the extrusion die cavity, the through cavity sequentially comprises an accommodating cavity, a contraction cavity and an expansion cavity from the direction close to the die cavity to the direction far away from the die cavity, wherein the accommodating cavity is used for accommodating the contraction rod punch die, the aperture of the contraction cavity is approximately the same as that of the joint of the extrusion area, and the aperture of the expansion cavity is larger than that of the contraction cavity.

Preferably, the core punching unit comprises a main die punching core abutting against an opening end of the main die sleeve and a tungsten steel accommodating sleeve arranged at one end, close to the workpiece, of the main die punching core, and the main die punching core and the tungsten steel accommodating sleeve jointly form the cavity.

Preferably, the outer wall of the main die punching core is provided with an annular clamping shoulder, and an annular flange clamped with the annular clamping shoulder is arranged in the hollow cavity of the main die sleeve.

Preferably, the thimble assembly is provided with a first thimble and a second thimble in sequence from being close to the workpiece direction to being far away from the workpiece direction, and the first thimble is clamped on the inner side edge of the tungsten steel accommodating sleeve.

Preferably, the main die assembly further comprises a threaded sleeve arranged at the other end of the main die sleeve, the threaded sleeve is provided with a first through hole along the axial direction of the threaded sleeve, and the first through hole is used for the second ejector pin to penetrate through.

Preferably, a pressure spring sleeved on the periphery of the second thimble is further arranged in the main die sleeve, and the pressure spring is arranged between the threaded sleeve and the main die punching core.

Preferably, the outer wall of the main mold sleeve is provided with a mounting groove.

Compared with the prior art, the method has the following beneficial effects:

the application provides an extrusion die, it encloses the shaping in establishing the cavity that forms at die cavity and extrusion die cavity through the work piece, extrusion's process has been accomplished, when die assembly breaks away from the master die subassembly, thimble assembly moves to ejecting position, so that the work piece after the shaping breaks away from the die cavity, make the process that the work piece breaks away from easier, reduce the contact of work piece and extrusion die cavity, can prolong extrusion die's life-span, the workpiece surface smoothness after the shaping has obtained the improvement, compact structure has, high machining precision, simple to operate's advantage.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of an extrusion die proposed in the present application;

FIG. 2 is a schematic cross-sectional view of an extrusion die set forth in the present application;

FIG. 3 is a state view of the main mold assembly with the ejector pin assembly in the molding position;

FIG. 4 is a state diagram of the main mold assembly with the ejector pin assembly in the ejection position;

FIG. 5 is an exploded schematic view of the main mold assembly of FIG. 2;

FIG. 6 is an exploded view of the needle assembly and compression spring of FIG. 2;

fig. 7 is an exploded view of the die assembly of fig. 2.

100-a workpiece; 200-a die assembly; 210-a die sleeve; 220-rod-retracting die; 230-a through cavity; 231-a housing cavity; 232-a contraction cavity; 233-an enlarged cavity; 240-extrusion die cavity; 241-arc area; 242-an extrusion zone; 300-main mold assembly; 310-a main die sleeve; 311-a groove; 320-an annular flange; 330-core punching unit; 340-a mold cavity; 350-punching the core by using a main die; 351-annular clip shoulder; 360-tungsten steel accommodating sleeve; 370-thread insert; 371 — a first via; 400-a thimble assembly; 410-a first thimble; 420-a second thimble; 500-pressure spring.

[ detailed description ] embodiments

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1 to 7, an extrusion die for extrusion molding of a workpiece 100 includes: the main die assembly 300 comprises a main die sleeve 310 which is hollow inside and has an open end, and a core punching unit 330 which is arranged in the main die sleeve 310 in a floating manner and abuts against the open end of the main die sleeve 310, wherein the core punching unit 330 is provided with a cavity 340 for inserting the workpiece 100; the die assembly 200 is arranged close to the opening end of the main die sleeve 310, an extrusion die cavity 240 matched with the die cavity 340 is arranged on the die assembly 200, and the aperture of the extrusion die cavity 240 is smaller than that of the die cavity 340; the ejector pin assembly 400 is arranged in the hollow cavity of the main die sleeve 310 and can move along the axial direction of the main die sleeve 310, and the ejector pin assembly 400 is partially inserted into the cavity 340; ejector pin assembly 400 has a molding position and an ejection position; when the main die assembly 300 and the die assembly 200 stamp, the die assembly 200 abuts against the core punching unit 330 and pushes the core punching unit 330 to move away from the open end side, and the ejector pin assembly 400 moves to the forming position in response to the movement of the core punching unit 330, so that the workpiece 100 is formed in a cavity formed by the surrounding of the die cavity 340 and the extrusion die cavity 240; when the die assembly 200 is separated from the main die assembly 300, the ejector pin assembly 400 can move from the molding position to the ejection position, so that the molded workpiece 100 is separated from the cavity 340.

In this way, it is formed in the cavity that cavity 340 and extrusion die cavity 240 enclose to establish through work piece 100, the process of extrusion has been accomplished, when die assembly 200 breaks away from main die assembly 300, thimble assembly 400 moves to ejecting position, so that work piece 100 after the shaping breaks away from cavity 340, make the process that work piece 100 breaks away from easier, reduce the contact of work piece and extrusion die cavity, can prolong the life-span of extrusion die, work piece 100 surface smoothness after the shaping has obtained the improvement, compact structure has, high machining precision, simple to operate's advantage.

Further, the die assembly 200 includes a die housing 210 and a draw die 220 disposed at an end of the die housing 210, the draw die 220 being disposed adjacent to the workpiece 100, wherein the draw die 220 defines a compression cavity 240.

Furthermore, the extrusion die cavity 240 comprises an arc area 241 close to the die cavity 340 and an extrusion area 242 far away from the die cavity 340, and the extrusion area 242 is in a contraction state compared with the arc area 241, so that the workpiece can enter the extrusion die cavity 240 more easily and can be extruded into a set shape.

Further, the cavities of extrusion region 242 are slightly constricted in a direction from being closer to main mold assembly 300 to being farther from main mold assembly 300, so that molded workpiece 100 can be smoothly separated from extrusion cavity 240.

Further, the die sleeve 210 is provided with a through cavity 230 coaxial with the extrusion die cavity 240, the through cavity 230 sequentially comprises an accommodating cavity 231, a contraction cavity 232 and an expansion cavity 233 from the direction close to the die cavity 340 to the direction far away from the die cavity 340, wherein the accommodating cavity 231 is used for accommodating the rod-contracting die 220, the aperture of the contraction cavity 232 is substantially the same as that of the connection part of the extrusion region 242, and the aperture of the expansion cavity 233 is larger than that of the contraction cavity 232.

Further, the core punching unit 330 includes a main mold punching core 350 abutting against the opening end of the main mold sleeve 310 and a tungsten steel accommodating sleeve 360 disposed at one end of the main mold punching core 350 close to the workpiece 100, the main mold punching core 350 and the tungsten steel accommodating sleeve 360 together form the cavity 340, and the tungsten steel has the advantages of high hardness and wear resistance, so that the cavity 340 has better wear resistance, and the service life of the extrusion mold can be prolonged.

Further, the outer wall of the main die stamping core 350 is provided with an annular clamping shoulder 351, and an annular flange 320 clamped with the annular clamping shoulder 351 is arranged in the hollow cavity of the main die sleeve 310; when the thimble assembly 400 is at the molding position, the thimble assembly 400 is engaged with the other end of the main mold sleeve 310, and when the thimble assembly 400 is at the ejecting position, the annular engaging shoulder 351 is engaged with the annular flange 320.

Further, the thimble assembly 400 is sequentially provided with a first thimble 410 and a second thimble 420 from the direction close to the workpiece 100 to the direction away from the workpiece 100, and the first thimble 410 is clamped at the inner side edge of the tungsten steel accommodating sleeve 360 for facilitating the processing.

Further, the main mold assembly 300 further includes a threaded sleeve 370 disposed at the other end of the main mold sleeve 310, the threaded sleeve 370 is provided with a first through hole 371 along the axial direction thereof, the first through hole 371 is used for the second thimble 420 to penetrate, and when the thimble assembly 400 is located at the forming position, the second thimble 420 is clamped at the inner side edge of the threaded sleeve 370.

Further, a pressure spring 500 sleeved on the outer periphery of the second thimble 420 is further disposed in the main mold sleeve 310, wherein the pressure spring 500 is disposed between the threaded sleeve 370 and the main mold punch core 350, and when the thimble assembly 400 is at the ejection position, the pressure spring 500 provides a pushing force to the main mold punch core 350, so that the annular shoulder 351 is clamped to the annular flange 320.

Further, the outer wall of the main mold sleeve 310 is provided with a mounting groove 311, which is convenient for mounting and positioning the extrusion mold.

The above is only one specific embodiment of the present application, and any other modifications based on the concept of the present application are considered as the protection scope of the present application.

Claims

1. An extrusion die for extrusion forming of a workpiece (100), comprising:

the main die assembly (300) comprises a main die sleeve (310) which is hollow inside and has an opening at one end, and a core punching unit (330) which is arranged in the main die sleeve (310) in a floating mode and abutted to the opening end of the main die sleeve (310), wherein the core punching unit (330) is provided with a cavity (340) for inserting a workpiece (100);

the die assembly (200) is arranged close to the opening end of the main die sleeve (310), an extrusion die cavity (240) matched with the die cavity (340) is arranged on the die assembly (200), and the aperture of the extrusion die cavity (240) is smaller than that of the die cavity (340);

the ejector pin assembly (400) is arranged in a hollow cavity of the main die sleeve (310) and can move along the axial direction of the main die sleeve (310), and part of the ejector pin assembly (400) is inserted into the cavity (340); the ejector pin assembly (400) is provided with a forming position and an ejecting position;

wherein, when the main die assembly (300) and the die assembly (200) are punching, the die assembly (200) abuts against the core punching unit (330) and pushes the core punching unit (330) to move away from the open end side, and the ejector pin assembly (400) moves to the forming position in response to the movement of the core punching unit (330) so as to form the workpiece (100) in a cavity formed by the cavity (340) and the extrusion die cavity (240);

wherein the ejector pin assembly (400) is movable from the molding position to the ejection position to disengage the molded workpiece (100) from the cavity (340) when the die assembly (200) is disengaged from the main die assembly (300).

2. The extrusion die of claim 1, wherein the die assembly (200) comprises a die housing (210) and a draw die (220) disposed at one end of the die housing (210), the draw die (220) being disposed proximate to the workpiece (100), wherein the draw die (220) defines the extrusion die cavity (240).

3. Extrusion die according to claim 2, wherein the extrusion die cavity (240) comprises a circular arc zone (241) close to the die cavity (340) and an extrusion zone (242) far from the die cavity (340), the extrusion zone (242) being in a contracted condition compared to the circular arc zone (241).

4. The extrusion die of claim 3, wherein the die sleeve (210) is provided with a through cavity (230) coaxial with the extrusion die cavity (240), the through cavity (230) sequentially comprises an accommodating cavity (231), a contraction cavity (232) and an expansion cavity (233) from the direction close to the die cavity (340) to the direction far away from the die cavity (340), wherein the accommodating cavity (231) is used for accommodating the rod-contracting die (220), the aperture of the contraction cavity (232) is substantially the same as that of the connection part of the extrusion region (242), and the aperture of the expansion cavity (233) is larger than that of the contraction cavity (232).

5. The extrusion die of claim 1, wherein the punch unit (330) comprises a main die punch (350) abutting against an open end of the main die sleeve (310) and a tungsten steel receiving sleeve (360) disposed inside the main die punch (350) near one end of the workpiece (100), the main die punch (350) and the tungsten steel receiving sleeve (360) together forming the die cavity (340).

6. The extrusion die as claimed in claim 5, wherein the outer wall of the main die core (350) is provided with an annular clamping shoulder (351) thereof, and the hollow cavity of the main die sleeve (310) is provided with an annular flange (320) clamped with the annular clamping shoulder (351).

7. The extrusion die of claim 5, wherein the thimble assembly (400) is provided with a first thimble (410) and a second thimble (420) in sequence from a direction close to the workpiece (100) to a direction away from the workpiece (100), and the first thimble (410) is clamped on an inner side edge of the tungsten steel accommodating sleeve (360).

8. The extrusion die of claim 7, wherein the main die assembly (300) further comprises a threaded sleeve (370) disposed at the other end of the main die sleeve (310), the threaded sleeve (370) defines a first through hole (371) along an axial direction thereof, and the first through hole (371) is used for the second ejector pin (420) to penetrate therethrough.

9. The extrusion die of claim 8, wherein a compression spring (500) is further disposed in the main die sleeve (310) and sleeved on the outer periphery of the second ejector pin (420), wherein the compression spring (500) is disposed between the threaded sleeve (370) and the main die punch (350).

10. The extrusion die of claim 5, wherein the outer wall of the main die sleeve (310) is provided with a mounting groove (311).