CN221246830U

CN221246830U - Cold heading die

Info

Publication number: CN221246830U
Application number: CN202322927888.0U
Authority: CN
Inventors: 王阳波; 王杰洪; 方俊生; 邹孝满
Original assignee: Fasler Xiamen Precision Mould Co ltd
Current assignee: Fasler Xiamen Precision Mould Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-07-02
Anticipated expiration: 2033-10-31

Abstract

The utility model discloses a cold heading die. The die comprises a die shell, wherein a die is movably arranged at one end of the die shell, an elastic reset piece for resetting the die is arranged between the die shell and the die, a die core is fixedly arranged at the axis of the die, a die cavity is formed in the die core, and a thimble and a punching needle are sequentially and movably penetrated in the die cavity from inside to outside; the outer side wall of the thimble is abutted with the inner side wall of the punching needle; the die and the mould shell are arranged from top to bottom, and the die further comprises a limiting block and a base, wherein the limiting block is fixedly arranged at the bottom of the elastic resetting piece, the bottom of the punch needle is arranged at the limiting block in an extending manner, and the limiting block is abutted with the base; the external driving device applies force to the internal mold and the workpiece to be processed, the internal mold moves towards the mold shell, the punching needle is used for protecting holes at the bottom of the workpiece to be processed from deforming, after the workpiece to be processed is extruded and molded by the mold cavity, the compression spring resets the punching die, the sliding block drives the ejector pin to eject the molded workpiece out of the mold cavity, and the structure of the punching needle and the ejector pin can avoid overlarge stress.

Description

Cold heading die

Technical Field

The utility model relates to the field of cold heading dies, in particular to a cold heading die.

Background

The cold heading process is one of the new processes of few and no cutting metal pressure processing. The cold heading process generally uses a cold heading machine, and designers can design and manufacture corresponding cold heading dies according to different types of fasteners which are produced as required. These dies typically come in pairs, including a die core for shaping the shape of the workpiece and a die sleeve for shaping the internal bore of the workpiece. The dies are mounted on a module which is used to withstand the pressure generated by the cold header.

The cold heading die is a key component in the cold heading process, the quality of the cold heading die directly influences the quality and production efficiency of cold heading products, the cold heading die is generally composed of a die shell, a stamping die, a thimble, a push tube and other components, when a workpiece with a structure similar to a punch riveting bolt is machined, in the prior art, the hole at the bottom of the workpiece is usually punched about half of the hole depth in the former die, and the hole depth and the extrusion flange face of the last die are finished by utilizing a punch pin, but the forging method can lead to uncontrollable height of the head of the workpiece and easy damage of the push tube, so that the push tube has short service life, the wall of the push tube is too thin and easy to deform when stressed. With this structure, not only the yield of the work is reduced, but also the push tube is required to be replaced frequently.

Disclosure of utility model

Aiming at the problems in the prior art, the utility model provides a cold heading die which can effectively solve the problems in the prior art.

The technical scheme of the utility model is as follows:

According to one aspect of the utility model, it comprises: the die comprises a die shell, wherein a die is movably arranged at one end of the die shell, an elastic reset piece for resetting the die is arranged between the die shell and the die, a die core is fixedly arranged at the axis of the die, a die cavity is formed in the die core, and a thimble and a punching needle are sequentially and movably penetrated from inside to outside in the die cavity; the outer side wall of the thimble is abutted with the inner side wall of the punching needle; the die and the die shell are arranged from top to bottom, the die further comprises a limiting block and a base, the limiting block is fixedly arranged at the bottom of the elastic resetting piece, the bottom of the punching needle is arranged at the limiting block in an extending mode, and the limiting block is in butt joint with the base.

Further, two bolt holes are symmetrically arranged on the shuttering along the axis; two sliding grooves are symmetrically formed in the bottom of the stamping die along the axis, and protrusions are arranged at the upper end and the lower end of each sliding groove; the shuttering is also provided with a plurality of bolts, the bolts are inserted into the bolt holes, one side of the bolts is abutted to the sliding groove, and the other side of the bolts extends to the shuttering.

Further, one end of the bolt is provided with a boss which is abutted against the outer side wall of the mould shell.

Further, the punching needle and the ejector pin are coaxially arranged, and the bottom of the ejector pin extends to the base; the base is internally provided with a cavity, the cavity is slidably provided with a sliding block, and the bottom of the thimble is fixedly connected with the sliding block.

Further, a boss is arranged in the middle of the inner side of the mould shell, the upper end of the boss is abutted with the die, and the lower end of the boss is abutted with the limiting block.

Further, the cross section of the punch needle is in a convex shape.

Further, a boss is arranged at the bottom of the thimble.

By adopting the technical scheme, compared with the prior art, the utility model has the beneficial effects that:

The mechanical clamp through external equipment is adopted to place the workpiece to be processed in the die cavity, the external driving equipment applies force to the internal mold and the workpiece to be processed, the internal mold moves towards the die shell, the compression spring is stressed and compressed, the punching pin is used for protecting the hole at the bottom of the workpiece to be processed from deforming, the external driving equipment leaves the punching die after the die cavity is used for extrusion molding the workpiece to be processed, the compression spring resets the punching die, the external jacking device drives the sliding block to slide, the sliding block drives the ejector pin to eject the molded workpiece out of the die cavity, and the structure can avoid overlarge stress on the punching pin and the ejector pin, so that the service life of the die is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic view of a first explosive structure according to the present utility model;

FIG. 3 is a schematic diagram of a second explosive structure according to the present utility model;

FIG. 4 is a schematic cross-sectional view of the present utility model in an uncompressed state;

FIG. 5 is a schematic cross-sectional view of the extruded state of the present utility model;

FIG. 6 is a schematic cross-sectional view of the present utility model;

FIG. 7 is a schematic view of an exploded view of the die and form of the present utility model;

FIG. 8 is a schematic cross-sectional view of a workpiece to be processed;

FIG. 9 is a schematic cross-sectional view of an extruded workpiece according to the present utility model;

in the figure: the die comprises a die shell-1, a die-2, a die core-3, a punch pin-4, a thimble-5, a compression spring-6, a limiting block-7, a base-8, a bolt-9, a sliding block-10, a mounting groove-11, a bolt hole-12, a cavity-13, a limiting groove-14, a sliding seat-21, a groove-22, a workpiece to be processed-A and a molded workpiece-B.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present utility model, but do not limit the scope of the present utility model. Likewise, the following examples are only some, but not all, of the examples of the present utility model, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present utility model.

As shown in fig. 1 to 7, the present solution provides a cold heading die.

Referring to fig. 1, the method includes: the shuttering 1, the outer side wall of the shuttering 1 is provided with a plurality of mounting grooves 11, the utility model is fixed on the external equipment through the mounting grooves 11; one end of the die shell 1 is movably provided with a die 2, the die 2 also comprises a die core 3, and the die 2 is fixedly connected with the die core 3; the mold core 3 is provided with a mold cavity, the inside of the mold cavity is sequentially and movably penetrated with a thimble 5 and a punching needle 4 from inside to outside, and the outer side wall of the thimble 5 is abutted with the inner side wall of the punching needle 4; the ejector pin 5 is used for pushing the molded workpiece B out of the mold core 3; as shown in fig. 4, the punch pin 4 and the ejector pin 5 are coaxially arranged, and the bottom of the ejector pin 5 extends to the base 8; a cavity 13 is formed in the base 8, a sliding block 10 is slidably arranged in the cavity 13, and the bottom of the thimble 5 is fixedly connected with the sliding block 10.

Referring to fig. 2 and 4, in the present embodiment, an elastic restoring member for restoring the die 2 is provided between the die case 1 and the die 2, and the elastic restoring member is a compression spring 6, and in other embodiments, the elastic restoring member may be another member capable of restoring the die 2, which is not limited herein.

In this embodiment, two pin holes 12 are symmetrically arranged along the axis of the formwork 1; two sliding grooves 22 are symmetrically arranged at the bottom of the die 2 along the axis, and protrusions are arranged at the upper end and the lower end of each sliding groove 22; the shuttering 1 is also provided with a plurality of bolts 9, the bolts 9 are inserted into the bolt holes 12, as shown in fig. 7, the bolts 9 are connected with the middle part of the bolt holes 12, and a limit groove 14 is formed, which can limit the bolts 9; and one side of the bolt 9 is abutted against the chute 22, the other side of the bolt 9 extends to the formwork 1, one end of the bolt 9 is provided with a boss, and the boss is abutted against the outer side wall of the formwork 1.

Referring to fig. 4, in the present embodiment, the cross section of the punch pin 4 is in a "convex" shape, which can improve the stability of the punch pin 4 and the stopper 7, and avoid the punch pin 4 from being stressed for a long time and being separated from the stopper 7.

Referring to fig. 4, in this embodiment, a boss is disposed at the bottom of the thimble 5, and the boss disposed at the bottom of the thimble can limit the thimble 5 when the thimble 5 moves outwards, so as to prevent the thimble 5 from being separated from the formwork 1 by an external driving device.

The die 2 and the die shell 1 are arranged from top to bottom, and further comprise a limiting block 7 and a base 8, wherein the base 8 is fixedly connected with the inner side wall of the die shell 1, the limiting block 7 is fixedly arranged at the bottom of the compression spring 6, the bottom of the punch pin 4 is arranged at the limiting block 7 in an extending manner, and the limiting block 7 is abutted with the base 8; a boss is arranged in the middle of the inner side of the die shell 1, the upper end of the boss is abutted with the die 2, and the lower end of the boss is abutted with the limiting block 7.

The utility model is applicable to workpieces requiring extrusion of the bottom of a bolt to form a hole, for example: and punching and riveting the bolts.

Working principle: placing a workpiece A to be processed in a cavity through a mechanical clamp of external equipment, applying force to an internal mold 2 and the workpiece A to be processed by external driving equipment, moving the internal mold 2 towards a mold shell 1, compressing a compression spring 6 under force, wherein a punching needle 4 is used for pressing the hole at the bottom of the workpiece A to be processed without deformation, after the workpiece A to be processed is extruded and molded by the cavity, leaving the die 2 by the external driving equipment, resetting the die 2 by the compression spring 6, driving a sliding block 10 to slide by an external jacking device, and driving a thimble 5 to jack a molded workpiece B out of the cavity by the sliding block 10;

If the internal parts of the utility model are aged and damaged, the stamping die 2 and the die shell 1 can be disassembled only by pulling out the bolt 9, and then the internal parts are maintained or replaced.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A cold heading die comprising: the die comprises a die shell (1), wherein a die (2) is movably arranged at one end of the die shell (1), and an elastic reset piece for resetting the die (2) is arranged between the die shell (1) and the die (2), and is characterized in that a die core (3) is fixedly arranged at the axis of the die (2), a die cavity is formed in the die core (3), and a thimble (5) and a punch needle (4) are sequentially and movably penetrated from inside to outside of the die cavity; the outer side wall of the thimble (5) is abutted with the inner side wall of the punch pin (4);

The die comprises a die body and is characterized in that the die body (2) and the die shell (1) are arranged from top to bottom, the die further comprises a limiting block (7) and a base (8), the limiting block (7) is fixedly arranged at the bottom of an elastic resetting piece, the bottom of the punch pin (4) is extended to be arranged at the limiting block (7), and the limiting block (7) is in butt joint with the base (8).

2. A cold heading die as claimed in claim 1, wherein said die shell (1) is provided with two pin holes (12) symmetrically along the axis; two sliding grooves (22) are symmetrically formed in the bottom of the stamping die (2) along the axis, and protrusions are arranged at the upper end and the lower end of each sliding groove (22); the shuttering (1) is also provided with a plurality of bolts (9), the bolts (9) are inserted into the bolt holes (12), one side of the bolts (9) is abutted to the sliding groove (22), and the other side of the bolts (9) extends to the shuttering (1).

3. A cold heading die as claimed in claim 2, characterised in that one end of the bolt (9) is provided with a boss which abuts against the outer side wall of the die shell (1).

4. A cold heading die as claimed in claim 1, characterized in that the punch pin (4) is arranged coaxially with the ejector pin (5) and the bottom of the ejector pin (5) extends to the base (8); the novel thimble structure is characterized in that a cavity (13) is formed in the base (8), a sliding block (10) is slidably arranged in the cavity (13), and the bottom of the thimble (5) is fixedly connected with the sliding block (10).

5. A cold heading die as in claim 1, wherein a boss is provided in the middle of the inner side of the die shell (1), the upper end of the boss is abutted against the die (2), and the lower end of the boss is abutted against the stopper (7).

6. A cold heading die as claimed in claim 1 or 4, characterised in that the cross section of the punch pin (4) is "convex".

7. A cold heading die as claimed in claim 1 or 4, characterized in that the bottom of the ejector pin (5) is provided with a boss.