CN204953793U - Prevent step mould for cold heading machine of ejector pin damage - Google Patents
Prevent step mould for cold heading machine of ejector pin damage Download PDFInfo
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- CN204953793U CN204953793U CN201520662690.7U CN201520662690U CN204953793U CN 204953793 U CN204953793 U CN 204953793U CN 201520662690 U CN201520662690 U CN 201520662690U CN 204953793 U CN204953793 U CN 204953793U
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- step mould
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Abstract
The utility model provides a prevent step mould for cold heading machine of ejector pin damage, including ejector pin, step mould and ejector rod base, the step mould includes the same external mold in axis and carbide centre form, is equipped with right angle step nib in the centre form, and the internal diameter that the nib is close to ejector rod base's part is less than the internal diameter of keeping away from the ejector rod base part, and the nib that is close to ejector rod base in the centre form extends to the terminal surface that the external mold is close to ejector rod base one end, and the big nib in aperture is the same with the mould aperture that has now, ejector pin one end is the head of cylinder, cylinder and the step nib big some clearance fit in footpath, all the other parts of ejector pin are elongate rod, elongate rod and the step nib little some clearance fit in footpath, elongate rod passes the nib and the ejector rod base interference fit of step mould, is equipped with the cushion with step mould nib clearance fit between the cylinder head of ejector pin and the step of step mould. The utility model discloses the no longer easy crooked or fracture of ejector pin finally makes the rammer system process of the thin pole high rigidity product of overlength to go on smoothly.
Description
Technical field
The utility model belongs to cold-heading apparatus field, particularly relates to a kind of cold headers step mould preventing push rod from damaging.
Background technology
Cold headers are a kind of cutting highly efficient in productivity, few or the common equipment without cutting, and the mould structure of its inside is the key ensureing upsetting quality.Wherein the effect of push rod ejects the product at die internal shaping.In Cold Heading Process, for the cold-heading product of slender rod type, especially existing elongate rod has again the cold-heading product of high rigidity, the draw ratio being exposed at step mould outer side due to step mould push rod is very large, the strength of shaped head is very large, push rod can be subject to the very large moment of deflection that product transmission comes, and is easy to cause push rod generation plastic bending or brittle fracture, causes upsetting system to carry out.
Utility model content
The problem that the technical program will solve is to provide a kind of cold headers step mould preventing push rod from damaging avoided push rod to bend or rupture.
For solving the problem, the technical solution adopted in the utility model:
A kind of cold headers step mould preventing push rod from damaging, comprise push rod, step mould and tip-lever support, described step mould comprises internal mold and external mold, described internal mold is located in described external mold, described external mold is identical with the axis of described internal mold, the material of described internal mold is carbide alloy, step nib is provided with in described internal mold, described step is right angle step, described step nib is less than the internal diameter away from tip-lever support part near the internal diameter of the part of described tip-lever support, nib near described tip-lever support in described internal mold extends to the end face of described external mold near described tip-lever support one end, the large nib in aperture is identical with existing mould aperture, described push rod one end is cylindrical head, and the portion gap that described cylinder is large with step nib footpath coordinates, the remainder of described push rod is elongate rod, and the portion gap that described elongate rod is little with step nib footpath coordinates, described elongate rod passes the nib of described step mould and described tip-lever support interference fit, is provided with cushion block, described cushion block and described step mould nib matched in clearance between the cylinder head of described push rod and the step of described step mould.
Described step mould is integral type structure.
Described step mould is the split-type structural separated at the step surface place of described step nib.
Described internal mold is the split-type structural separated at the step surface place of described step nib.
Described cushion block has multi-thickness specification.
Described cushion block and described push rod are integral type structure.
The advantage that the utility model has and good effect are:
(1) owing to adopting step nib structure and push rod and cushion block, in upsetting process, push rod is not subject to or is subject to very little axial compressive force, and push rod is bending or fracture no longer easily, finally makes the upsetting process of ultra-long slender rod high rigidity product to carry out smoothly; Meanwhile, by changing pad thickness or quantity, use one piece of step mould just upsetting can make the product of different length.
(2) step mould is integral type structure, avoids being occurred overlap by cold-heading product at step place and hindering push rod to eject by cold-heading product, and structural stability is good simultaneously;
(3) step mould is the split-type structural separated at the step surface place of step nib, reduces the difficulty of Mould Machining;
(4) internal mold is the split-type structural separated at the step surface place of step nib, reduces Mould Machining difficulty, and structural stability is better simultaneously;
(5) cushion block and push rod are integral type structure, reduce component count, convenient for assembly.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of a kind of cold headers step mould preventing push rod from damaging of the present utility model;
Fig. 2 uses a kind of cold headers step mould preventing push rod from damaging of the present utility model each parts present position schematic diagram when product shaping;
Fig. 3 is the another kind of schematic diagram of a kind of cold headers step mould preventing push rod from damaging of the present utility model;
Fig. 4 uses a kind of cold headers step mould preventing push rod from damaging of the present utility model each parts present position schematic diagram when product shaping;
Fig. 5, Fig. 6 are the structural representations of the different embodiment of step mould.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Embodiment 1
As shown in Figure 1, a kind of cold headers step mould structure preventing push rod from damaging of the present utility model comprises four parts: push rod 1, cushion block 2, step mould 3, tip-lever support 4.Wherein, the nib of step mould has made former and later two parts, the pore size of the anterior 3-1 of nib is equal with common counterdie pore size, and the pore size of nib rear portion 3-2 is less than the pore size of the anterior 3-1 of nib, is made into right angle step 3-3 between the anterior 3-1 and nib rear portion 3-2 of nib.Former and later two parts made by push rod 1, and the anterior 1-1 of push rod is cylindrical head, the anterior 3-1 matched in clearance of nib of its body diameter and step mould; Push rod rear portion 1-2 is elongated straight-bar, the diameter of straight-bar and the nib rear portion 3-2 matched in clearance of step mould.The shape of cushion block 2 center hole that to be through on the cylinder axial, center hole coordinates with push rod rear portion 1-2, cushion block external diameter and the anterior 3-1 matched in clearance of step mould nib.The shape of tip-lever support 4 is with the center hole that to be equally through on the cylinder axial of cushion block 2, and the size unlike each tip-lever support 4 can be different, the center hole of tip-lever support 4 and push rod rear portion 1-2 interference fit.
The using method of above-mentioned a kind of cold headers step mould structure preventing push rod from damaging is: according to the length of upsetting product, select the cushion block 2 of respective numbers and respective thickness, and be enclosed within the 1-2 of push rod rear portion, push rod rear portion 1-2 is filled in from the anterior 3-1 of the nib of step mould and exposes in step mould back, push rod rear portion 1-2 to be filled in further in tip-lever support 4 and to make the end face of push rod rear portion 1-2 and the end face of tip-lever support 4, then aforementioned step mould structure being arranged on upsetting product on cold headers; When formed product head, the material jacking mechanism of push rod back must be made to step back enough positions, as shown in Figure 2, allow between the material jacking mechanism 5 of back and push rod and there is gap, in such cases, be delivered to the axial force on push rod 1 by product, be all delivered on the right angle step 3-3 of step mould by cushion block 2, thus make elongated push rod rear portion 1-2 can not be subject to excessive axial force and bending or disrumpent feelings.This step mould can be made can be used for upsetting different length product by regulating the quantity of cushion block 2 and thickness.
Embodiment 2
As shown in Figure 3, the push rod in embodiment 1 and cushion block merge by a kind of cold headers step mould structure preventing push rod from damaging of the present utility model, comprise three parts altogether: push rod 1, step mould 3, tip-lever support 4.Wherein, the nib of step mould has made former and later two parts, the pore size of the anterior 3-1 of nib and common step nib footpath equal and opposite in direction, the pore size of nib rear portion 3-2 is less than the pore size of the anterior 3-1 of nib, is made into right angle step 3-3 between the anterior 3-1 and nib rear portion 3-2 of nib.Former and later two parts made by push rod 1, and the anterior 1-1 of push rod is cylindrical head, the anterior 3-1 matched in clearance of nib of its body diameter and step mould; Push rod rear portion 1-2 is elongated straight-bar, the diameter of straight-bar and the nib rear portion 3-2 matched in clearance of step mould.The shape of tip-lever support 4 center hole, center hole and push rod rear portion 1-2 interference fit that to be through on the cylinder axial.
The using method of above-mentioned a kind of cold headers step mould structure preventing push rod from damaging is: according to the length of upsetting product, the axial length of anterior for push rod 1-1 is made the length (length of the length=nib front portion (large nib) of product length+push rod front portion) of needs, push rod rear portion 1-2 is filled in from the anterior 3-1 of the nib of step mould and exposes in step mould back, push rod rear portion 1-2 to be filled in further in tip-lever support 4 and to make the end face of push rod rear portion 1-2 and the end face of tip-lever support 4, then aforementioned step mould structure is arranged on upsetting product on cold headers, when formed product head, the material jacking mechanism of push rod back must be made to step back enough positions, as shown in Figure 4, allow between the material jacking mechanism 5 of back and push rod and there is gap, in such cases, be delivered to the axial force on push rod 1 by product, be all delivered on the right angle step 3-3 of step mould by the anterior 1-1 of push rod, thus make elongated push rod rear portion 1-2 can not be subject to excessive axial force and bending or disrumpent feelings.By adopting the axial dimension that the anterior 1-1 of push rod is different, this step mould can be made can be used for upsetting different length product.
Except above-mentioned two situations, step mould can also make the structure shown in Fig. 5, Fig. 6.
Above embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model scope change and improve, and all should still belong within this patent covering scope.
Claims (6)
1. the cold headers step mould preventing push rod from damaging, it is characterized in that: comprise push rod, step mould and tip-lever support, described step mould comprises internal mold and external mold, described internal mold is located in described external mold, described external mold is identical with the axis of described internal mold, the material of described internal mold is carbide alloy, step nib is provided with in described internal mold, described step is right angle step, described step nib is less than the internal diameter away from tip-lever support part near the internal diameter of the part of described tip-lever support, nib near described tip-lever support in described internal mold extends to the end face of described external mold near described tip-lever support one end, the large nib in aperture is identical with existing mould aperture, described push rod one end is cylindrical head, and the portion gap that described cylinder is large with step nib footpath coordinates, the remainder of described push rod is elongate rod, and the portion gap that described elongate rod is little with step nib footpath coordinates, described elongate rod passes the nib of described step mould and described tip-lever support interference fit, is provided with cushion block, described cushion block and described step mould nib matched in clearance between the cylinder head of described push rod and the step of described step mould.
2. the cold headers step mould preventing push rod from damaging according to claim 1, is characterized in that: described step mould is integral type structure.
3. the cold headers step mould preventing push rod from damaging according to claim 1, is characterized in that: described step mould is the split-type structural separated at the step surface place of described step nib.
4. the cold headers step mould preventing push rod from damaging according to claim 1, is characterized in that: described internal mold is the split-type structural separated at the step surface place of described step nib.
5. the cold headers step mould preventing push rod from damaging according to claim 1, is characterized in that: described cushion block has multi-thickness specification.
6. the cold headers step mould preventing push rod from damaging according to claim 1, is characterized in that: described cushion block and described push rod are integral type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520662690.7U CN204953793U (en) | 2015-08-28 | 2015-08-28 | Prevent step mould for cold heading machine of ejector pin damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520662690.7U CN204953793U (en) | 2015-08-28 | 2015-08-28 | Prevent step mould for cold heading machine of ejector pin damage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204953793U true CN204953793U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520662690.7U Active CN204953793U (en) | 2015-08-28 | 2015-08-28 | Prevent step mould for cold heading machine of ejector pin damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204953793U (en) |
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2015
- 2015-08-28 CN CN201520662690.7U patent/CN204953793U/en active Active
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