CN213379078U - Die set for front cutting of excircle of head of short bolt - Google Patents

Abstract

The utility model discloses a short bolt head excircle front cut die group, its excircle that realizes short bolt is amputated at the front mould, accomplishes cold mound. A front cutting die set for the excircle of the head of a short bolt comprises a die stamping shell, wherein a first cushion block, a second cushion block and a die core sleeve are fixed inside the die stamping shell; a first spring is arranged in the second cushion block; a punching die core is fixed at the front end inside the die core sleeve and used for forward cutting, a rod sleeve is fixed at the rear end inside the die core sleeve, a movable punching rod is arranged in the rod sleeve, the tail of the punching rod is pressed on a first spring, and the head of the punching rod is used for pressing the head of the short bolt; the rear module comprises a rear module shell, the front end of the interior of the rear module shell is fixedly provided with a trimming die sleeve, a movable trimming rear die penetrates through the interior of the trimming die sleeve, and the front end of the interior of the trimming rear die is provided with a cavity matched with the short bolt; and a second spring is arranged between the trimming rear die and the trimming die sleeve, and a movable punching needle is arranged in the trimming rear die.

Description

Die set for front cutting of excircle of head of short bolt

Technical Field

The utility model belongs to the technical field of bolt processing, specifically speaking relates to a cut die set before short bolt head excircle.

Background

Aiming at an ultra-short bolt product with strict tolerance requirement on the head excircle (the product length is less than 2.5D, and D is the nominal diameter of a short bolt), the head excircle needs to be designed with an excircle cutting process in a cold heading process so as to meet the size requirement.

However, if the bolt is too short and the washer is very thin, the washer is deformed due to insufficient opening time of the clamp of the machine table and ejection of the ejection rod of the die, so that the excircle of the head cutting part is not easy to realize on the cold header and the process can be finished only by means of machining.

The similar short bolt of the automobile safety belt is just the structure, but the machining cost is high and the efficiency is low. Therefore, a new die structure is needed to realize the external circle trimming of the short bolt product.

Disclosure of Invention

The utility model aims at providing a short bolt head excircle front cut die group, its excircle that realizes short bolt is amputated at the front mould, accomplishes cold mound.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

a front cutting die set for the excircle of the head of a short bolt comprises a front die set and a rear die set which is oppositely matched with the front die set, wherein the short bolt is arranged between the front die set and the rear die set; the front module comprises a punching mould shell, the punching mould shell is hollow, and a first cushion block, a second cushion block and a mould core sleeve are fixed inside the punching mould shell; a first spring is arranged in the second cushion block; a punching die core is fixed at the front end inside the die core sleeve and used for forward cutting, a rod sleeve is fixed at the rear end inside the die core sleeve, a movable punching rod is arranged in the rod sleeve, the tail of the punching rod is pressed on a first spring, and the head of the punching rod is used for pressing the head of the short bolt; the rear module comprises a rear module shell, the rear module shell is hollow, a trimming die sleeve is fixed at the front end of the interior of the rear module shell, a movable trimming rear die penetrates through the interior of the trimming die sleeve, and a cavity matched with the short bolt is formed in the front end of the interior of the trimming rear die; a second spring is arranged between the trimming rear die and the trimming die sleeve, and a movable punching needle is arranged in the trimming rear die; a third cushion block is arranged in the rear die shell and is pressed against the trimming rear die, a third spring is arranged in the third cushion block, the tail part of the punching needle is pressed against the third spring, and the head part of the punching needle is used for pressing against the tail part of the short bolt; the third cushion block and the third spring are simultaneously jacked by one side face of the jacking rod, and the fourth spring is jacked by the other side face of the jacking rod.

On the basis of the above scheme and as a preferable scheme of the scheme: the punching die shell, the die core sleeve and the rod sleeve are fixedly connected with each other through a stepped table top; a gap exists between the end face of the rod sleeve and the end face of the die core, and a gap also exists between the punch rod and the die core and is used for the head of the short bolt to extend into.

On the basis of the above scheme and as a preferable scheme of the scheme: still include the extension cushion, the inside cavity of extension cushion, the extension cushion is in the same place with the concatenation of back die shell, and fourth spring and ejector pin are established in the extension cushion.

On the basis of the above scheme and as a preferable scheme of the scheme: the rear mould shell, the rear mould sleeve and the trimming mould sleeve are fixedly connected with each other through a stepped table-board; the fourth cushion block is pressed between the trimming die sleeve and the lengthened cushion block.

On the basis of the above scheme and as a preferable scheme of the scheme: the second spring is wrapped by the trimming rear die, the fourth cushion block and the trimming rear die, and the third cushion block can move in the fourth cushion block.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model discloses a cut mould group before short bolt head excircle compares with prior art, through designing dedicated front module and back module, realizes that short bolt head excircle amputates at the front module, accomplishes the cold-heading, saves the machining process, effectively solves the technological problem of this type of product.

The front module comprises a die core sleeve and a die core, and the rear module comprises an edge cutting die sleeve and is matched with the edge cutting die sleeve to realize the excircle edge cutting.

Drawings

Fig. 1 is a schematic view of the front module structure of the present invention.

Fig. 2 is a schematic diagram of the rear module structure of the present invention.

Fig. 3 is a schematic diagram of the overall initial state structure of the present invention.

Fig. 4 is a schematic diagram of the overall operation state structure of the present invention.

Fig. 5 is the overall finished edge cutting structure of the present invention.

Reference numerals: a front module (01); 0100 of a die shell; a first cushion block 0101; a second head block 0102; a first spring 0103; 0104, a mold core sleeve; 0105, a die core; 0106, rod sleeve; 0107, punching a rod; a rear module 02; a rear mold shell 0201; the trimming die sleeve 0202; trimming rear dies 0203; a chamber 02030; a second spring 0204; punch pin 0205; a third cushion block 0206; a third spring 0207; a mandril 0208; a fourth spring 0209; a long pad 0210; a rear mold sleeve 0211; a fourth cushion block 0212; a short bolt 03;

Detailed Description

The present invention will be further described with reference to the following detailed description;

the embodiment provides a front cutting die set for an excircle of a head of a short bolt 03, which comprises a front die set 01 and a rear die set 02 which is oppositely matched with the front die set 01, wherein the short bolt 03 is arranged between the front die set 01 and the rear die set 02; the outer circle of the head of the short bolt 03 is trimmed on the front module 01, and the tolerance requirement of the outer circle of the required head is met;

the front module group 01 comprises a die shell 0100, the interior of the die shell 0100 is hollow, a first cushion block 0101, a second cushion block 0102 and a die core sleeve 0104 are fixed in the die shell 0100, and the first cushion block 0101, the second cushion block 0102 and the die core sleeve 0104 are spliced and fixed in the die shell 0100 and do not move; a first spring 0103 is arranged in the second cushion block 0102, and the first spring 0103 can extend and retract in the second cushion block 0102; a punching die core 0105 is fixed at the front end inside the die core sleeve 0104, the punching die core 0105 is used for forward cutting, a rod sleeve 0106 is fixed at the rear end inside the die core sleeve 0104, the punching die core 0105 is clamped and fixed by the rod sleeve 0106 and the die core sleeve 0104, a movable punching rod 0107 is arranged in the rod sleeve 0106, the tail of the punching rod 0107 is pressed against a first spring 0103, the punching rod 0107 moves back and forth in the rod sleeve 0106, the head of the punching rod 0107 is used for pressing against the head of the short bolt 03, and the punching rod 0107 clamps the short bolt 03 to ensure that the short bolt 03 cannot fall off;

the rear module 02 comprises a rear module shell 0201, the rear module shell 0201 is hollow, a trimming die sleeve 0202 is fixed at the front end in the rear module shell 0201, the trimming die sleeve 0202 is fixed in the rear module shell 0201 and does not move, a movable trimming rear die 0203 penetrates through the inside of the trimming die sleeve 0202, the trimming rear die 0203 can move back and forth in the trimming die sleeve 0202, the trimming rear die 0203 moves ahead to protrude the trimming die sleeve 0202 to avoid the front module 01 from being damaged by die collision, a cavity 02030 matched with a short bolt 03 is formed at the front end in the trimming rear die 0203, and the short bolt 03 can be inserted into the cavity to finish the external circular trimming;

a second spring 0204 is arranged between the edge cutting rear die 0203 and the edge cutting die sleeve 0202, the pushed edge cutting rear die 0203 is reset into the edge cutting die sleeve 0202 through the second spring 0204, a movable punching needle 0205 is arranged inside the edge cutting rear die 0203, the punching needle 0205 moves back and forth in the edge cutting rear die 0203, the short bolt 03 is guaranteed not to fall off, the stripping function is also realized after the front cutting of the excircle is finished, and the short bolt 03 is extruded;

a third cushion block 0206 is arranged in the rear die shell 0201, the third cushion block 0206 is pressed on the edge cutting rear die 0203, and the third cushion block 0206 pushes the edge cutting rear die 0203 to move forwards; a third spring 0207 is arranged in the third cushion block 0206, the tail part of the punching needle 0205 is pressed on the third spring 0207, the punching needle 0205 moves back and forth to drive the third spring 0207 to stretch, and the head part of the punching needle 0205 is used for jacking the tail part of the short bolt 03, so that the short bolt 03 cannot fall off and the material stripping effect can be achieved; the trimming die further comprises an ejector rod 0208, one side face of the ejector rod 0208 simultaneously pushes a third cushion block 0206 and a third spring 0207, the other side face of the ejector rod 0208 pushes a fourth spring 0209, the ejector rod 0208 pushes the third cushion block 0206 through the fourth spring 0209 in a pushing mode, and the third cushion block 0206 pushes a trimming rear die 0203;

in the specific implementation process, the punching rod 0107 of the front module 01 is ejected by the aid of the first spring 0103 to prop against the end face of the head of the short bolt 03, the third spring 0207 of the rear module 02 ejects the punching needle 0205 out of the opening of the trimming rear module 0203 to be flush, the end face of the punching needle 0205 props against the end face of the tail of the short bolt 03, the clamp for clamping the product can be opened at the moment, and the product cannot fall off.

The front module 01 moves towards the rear module 02, the third spring 0207 is compressed, the punching needle 0205 retreats until the lower supporting surface of the head of the short bolt 03 is in contact with the end face of the trimming rear die 0203, the ejector rod 0208 is ejected out at the moment, force is transmitted to the trimming rear die 0203 from the third cushion block 0206, and the trimming rear die 0203 ejects the product into the cavity of the front module 01 to finish the excircle trimming.

The front module 01 retreats backwards, the short bolt 03 is pulled out of the rear module 02, the first spring 0103 stretches, and the punch rod 0107 pushes out a product of the short bolt 03; or the short bolt 03 is left on the rear module 02, and the punching pin 0205 ejects the product out to complete material stripping;

furthermore, the two adjacent parts of the die shell 0100, the die core sleeve 0104 and the rod sleeve 0106 are fixedly connected through a stepped table top, and are conveniently spliced together and fixed; a gap exists between the end face of the rod sleeve 0106 and the end face of the die core 0105, and a gap also exists between the punch rod 0107 and the die core 0105 for the head of the short bolt 03 to extend into; as mentioned above, the two position gaps are provided, a space is reserved for the front cutting of the outer circle of the head of the short bolt 03, and the tolerance requirement is met through the design requirement;

further, the rear die shell structure further comprises a lengthened cushion block 0210, the lengthened cushion block 0210 is hollow inside, the lengthened cushion block 0210 is spliced with the rear die shell 0201, and a fourth spring 0209 and an ejector rod 0208 are arranged in the lengthened cushion block 0210. As described above, the lengthened cushion block 0210 plays a role in lengthening the rear die shell 0201, and installation of components in the rear die shell 0201 can be facilitated;

further, the die comprises a rear die sleeve 0211, and two adjacent parts of the rear die shell 0201, the rear die sleeve 0211 and the trimming die sleeve 0202 are fixedly connected through a stepped table top; and the fourth cushion block 0212 is also included, and the fourth cushion block 0212 is pressed between the side cutting die sleeve 0202 and the lengthened cushion block 0210. As mentioned above, the rear die shell 0201, the rear die sleeve 0211 and the trimming die sleeve 0202 are combined together, and only one single die is replaced, so that the rear die shell 0201, the rear die sleeve 0211 and the trimming die sleeve 0202 are convenient to disassemble, maintain and replace at the later stage;

further, the rear trimming die 0203, the fourth cushion block 0212 and the rear trimming die 0203 wrap the second spring 0204, and the third cushion block 0206 can move in the fourth cushion block 0212. As shown above, the second spring 0204 is better limited, so that the trimming rear die 0203 can move back and forth conveniently;

in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, or the orientation or position relationship that one skilled in the art conventionally understands, and are only for convenience of describing the present invention and simplifying the description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (5)

1. The utility model provides a die set is cut before short bolt head excircle which characterized in that: the short bolt is arranged between the front module and the rear module;

the front module comprises a punching mould shell, the punching mould shell is hollow, and a first cushion block, a second cushion block and a mould core sleeve are fixed inside the punching mould shell; a first spring is arranged in the second cushion block; a punching die core is fixed at the front end inside the die core sleeve and used for forward cutting, a rod sleeve is fixed at the rear end inside the die core sleeve, a movable punching rod is arranged in the rod sleeve, the tail of the punching rod is pressed on a first spring, and the head of the punching rod is used for pressing the head of the short bolt;

the rear module comprises a rear module shell, the rear module shell is hollow, a trimming die sleeve is fixed at the front end of the interior of the rear module shell, a movable trimming rear die penetrates through the interior of the trimming die sleeve, and a cavity matched with the short bolt is formed in the front end of the interior of the trimming rear die; a second spring is arranged between the trimming rear die and the trimming die sleeve, and a movable punching needle is arranged in the trimming rear die; a third cushion block is arranged in the rear die shell and is pressed against the trimming rear die, a third spring is arranged in the third cushion block, the tail part of the punching needle is pressed against the third spring, and the head part of the punching needle is used for pressing against the tail part of the short bolt; the third cushion block and the third spring are simultaneously jacked by one side face of the jacking rod, and the fourth spring is jacked by the other side face of the jacking rod.

2. The stud head excircle forward-cutting die set according to claim 1, characterized in that: the punching die shell, the die core sleeve and the rod sleeve are fixedly connected with each other through a stepped table top; a gap exists between the end face of the rod sleeve and the end face of the die core, and a gap also exists between the punch rod and the die core and is used for the head of the short bolt to extend into.

3. The stud head excircle forward-cutting die set according to claim 1, characterized in that: still include the extension cushion, the inside cavity of extension cushion, the extension cushion is in the same place with the concatenation of back die shell, and fourth spring and ejector pin are established in the extension cushion.

4. The stud head excircle front-cutting die set according to claim 3, characterized in that: the rear mould shell, the rear mould sleeve and the trimming mould sleeve are fixedly connected with each other through a stepped table-board; the fourth cushion block is pressed between the trimming die sleeve and the lengthened cushion block.

5. The stud head excircle front-cutting die set according to claim 4, characterized in that: the second spring is wrapped by the trimming rear die, the fourth cushion block and the trimming rear die, and the third cushion block can move in the fourth cushion block.

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