CN208390676U - A kind of tube-drawing mold - Google Patents
A kind of tube-drawing mold Download PDFInfo
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- CN208390676U CN208390676U CN201820695534.4U CN201820695534U CN208390676U CN 208390676 U CN208390676 U CN 208390676U CN 201820695534 U CN201820695534 U CN 201820695534U CN 208390676 U CN208390676 U CN 208390676U
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- die sleeve
- bearing
- tube
- interior
- interior die
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Abstract
The utility model discloses a kind of tube-drawing molds, belong to drawing technique field, solves the technical issues of eccentric blank is easily broken when using drawing mould in the prior art, tube-drawing mold in the utility model, including drawing die sleeve and interior die sleeve, the interior die sleeve is installed on the inside of the drawing die sleeve, the tube-drawing mold further includes bearing, the bearing is mounted between the interior die sleeve and the drawing die sleeve, so that the interior die sleeve can rotate under the effect of circumferential stress difference.
Description
[technical field]
The utility model relates to drawing technique field more particularly to a kind of tube-drawing molds.
[background technique]
Tube-drawing technique refers to pipe semi-finished product blank material, is drawn into certain size and cross sectional shape by drawing mould
Product, the design that currently used draw-off gear mostly uses greatly die sleeve and mold to be fixedly mounted, it is ensured that drawing mould is in drawing
It cannot rotate in the process, however the drawing mould for using such structure to design is during the drawing process, i.e., semi-products pass through mold
When, since pipe is there are wall thickness eccentric phenomena, and the position of mold is kept fixed constant, therefore pipe can only drag between mold
Dynamic operation easily leads to pipe fracture to increase the frictional force that pipe is subject to.In addition, can also be deposited by the finished product after mold
In the non-uniform phenomenon of stress distribution, it is not achieved Product Precision requirement, unstable quality, rejection rate is higher.
[utility model content]
A kind of drawing mould is provided the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art,
Tubing be can be effectively reduced because eccentric there is a phenomenon where being broken, improve the quality of product after drawing.
In order to solve the above technical problems, the utility model adopts the following technical solution:
A kind of tube-drawing mold, including drawing die sleeve and interior die sleeve, the interior die sleeve are installed in the drawing die sleeve
Side, the tube-drawing mold further includes bearing, and the bearing is mounted between the interior die sleeve and the drawing die sleeve, so that
The interior die sleeve can rotate under the effect of circumferential stress difference.
Further, the peripheral side of the interior die sleeve is equipped with the fixed plate to be formed that extends radially outwardly, the drawing die sleeve
One end be equipped with end cap flange, be additionally provided with positioning step on the inner sidewall of the drawing die sleeve, the bearing includes first bearing
And second bearing, the first bearing are installed between the positioning step and the side of the fixed plate, the second bearing
It is installed between the other side of the fixed plate and the end cap flange.
Further, the first bearing and the second bearing are self-aligning thrust roller bearing.
Further, the interior die sleeve and the drawing die cover clearance fit.
Further, the tube-drawing mold further includes stretching-machine motherboard, and the stretching-machine motherboard is set with the drawing
On die sleeve, the medial surface of the stretching-machine motherboard is the conical surface with the drawing die sleeve lateral surface cone match, the conical surface
Radius is gradually reduced along the feeding direction of tubing.
Further, the axis of the axis of the drawing die sleeve, the axis of interior die sleeve and the bearing is overlapped.
The utility model has the beneficial effects that
Tube-drawing mold in the utility model in use, if supplied materials pipe wall unevenness is even, in pipe
During being stretched, because pipe wall thickness difference generate circumferential stress difference can drive in die sleeve around drawing die sleeve central axis
Line rotation, becomes rolling friction from sliding friction between interior die sleeve and pipe, to reduce the axis that pipe is subject to during the drawing process
To frictional force, it is more uniformly stressed pipe itself, pipe is effectively reduced and is broken because of eccentric, to reduce drawing
Production cost, while rolling friction can also promote the material at wall thickness to flow to the thin place of wall to mention so that the wall thickness of finished product is more uniform
The quality of product after high drawing.
The peripheral side of interior die sleeve is equipped with the fixed plate to be formed that extends radially outwardly, and one end of drawing die sleeve is equipped with end cap method
Orchid is additionally provided with positioning step on the inner sidewall of drawing die sleeve, and bearing includes first bearing and second bearing, and first bearing is installed in
Between positioning step and the side of fixed plate, second bearing is installed between the other side of fixed plate and end cap flange.Such one
Come, the positioning of the installation to first bearing and second bearing be able to achieve by the cooperation of end cap flange and drawing die sleeve, assembling and
Dismantle it is relatively simple, convenient for first bearing and second bearing later period maintenance replace.
First bearing and second bearing are self-aligning thrust roller bearing.It is designed in this way, can allow for interior die sleeve according to pipe
The wall thickness difference of base generates radial shake and realizes automatic aligning, with compensating coaxial degree error.
Interior die sleeve and drawing die cover clearance fit.It is designed in this way, can be avoided to generate between interior die sleeve and drawing die sleeve and rub
Wipe resistance, it is ensured that interior die sleeve can rotate under the action of circumferential stress difference, equal so as to the wall thickness that improves finished product
Even property.
Tube-drawing mold further includes stretching-machine motherboard, and stretching-machine motherboard suit drawing die is put on, stretching-machine motherboard it is interior
Side is the conical surface with drawing die sleeve lateral surface cone match, and the radius of the conical surface is gradually reduced along the feeding direction of tubing.Such as
This design, it can be ensured that be arranged concentrically between drawing die sleeve and stretching trolley, while being also avoided that in drawing process, stretching-machine is female
Plate and drawing die sleeve are detached from, and last assembling in this way can also be convenient for the quick-replaceable of later period drawing mould.
The axis of the axis of drawing die sleeve, the axis of interior die sleeve and bearing is overlapped.It is designed in this way, can guarantee the wall of finished product
It is thick uniform, improve the quality of finished product.
These features and advantages of the utility model will the detailed exposure in following specific embodiment, attached drawing.
[Detailed description of the invention]
The utility model is described further with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of tube-drawing mold in the preferred embodiment in the utility model.
[specific embodiment]
The utility model discloses drawing mould, including drawing die sleeve and interior die sleeve, the interior die sleeve is installed on the drawing
Draft set inside, the tube-drawing mold further includes bearing, and the bearing is mounted on the interior die sleeve and the drawing die sleeve
Between, so that the interior die sleeve can rotate under the effect of circumferential stress difference.Drawing mould in use, if supplied materials pipe
Wall unevenness is even, then during pipe is stretched, because pipe wall thickness difference generate circumferential stress difference can drive in die sleeve
Central axis around drawing die sleeve rotates, and becomes rolling friction from sliding friction between interior die sleeve and pipe, to reduce pipe
The axial friction being subject to during the drawing process, is more uniformly stressed pipe itself, and pipe is effectively reduced and sends out because of eccentric
Raw fracture, so that drawing production cost is reduced, while rolling friction can also promote the material at wall thickness to flow to the thin place of wall, so that
The wall thickness of finished product is more uniform, improves the quality of product after drawing.
The technical solution of the utility model embodiment is explained below with reference to the attached drawing of the utility model embodiment and
Illustrate, but following embodiments are only the preferred embodiment of the utility model, and not all.Based on the implementation in embodiment
It is practical newly to belong to this for example, those skilled in the art's obtained other embodiments without making creative work
The protection scope of type.
As shown in Figure 1, the tube-drawing mold in the present embodiment, including stretching-machine motherboard 1, drawing die sleeve 2, interior die sleeve 3
And bearing, stretching-machine motherboard 1 are sleeved on drawing die sleeve 2, interior die sleeve 3 is mounted on 2 inside of drawing die sleeve, and bearing is mounted on internal model
Between set 3 and drawing die sleeve 2, so that interior die sleeve 3 can generate rotation under the effect of circumferential stress difference.
Specifically, the bearing in the present embodiment includes first bearing 4 and second bearing 5, the inner ring of first bearing 4 being capable of phase
It relatively rotates to the outer ring of first bearing 4, the inner ring of second bearing 5 can occur opposite with respect to the outer ring of second bearing 5
Rotation, the peripheral side of interior die sleeve are equipped with the fixed plate 31 to be formed that extends radially outwardly, and the feed end of drawing die sleeve is equipped with end cap method
Orchid 6, end cap flange 6 is fixed by screws on drawing die sleeve 2, and positioning step 21 is additionally provided on the inner sidewall of drawing die sleeve, the
One bearing 4 is installed between positioning step 21 and fixed plate 31, i.e. the outer ring of first bearing 4 is fitted on positioning step 21, the
The inner ring of one bearing 4 is fitted in the side of fixed plate 31, and second bearing 5 is installed between fixed plate 31 and end cap flange 6, that is, holds
Lid flange 6 is fitted on the outer ring of second bearing 5, and the inner ring of second bearing 5 is fitted in the other side of fixed plate 31.Such one
Come, the opposite drawing die sleeve 2 of interior die sleeve 3 just can be made to relatively rotate, while passing through the cooperation of end cap flange 6 and drawing die sleeve 2
It is able to achieve the installation positioning axially and radially to first bearing 4 and second bearing 5, assembly and disassembly are relatively simple, are convenient for
The maintenance in 5 later period of first bearing 4 and second bearing is replaced.
When tube-drawing mold in the present embodiment processes tubing, it is additionally provided with stretching core bar in interior die sleeve, pipe is from stretching
Discharge is squeezed between core bar and interior Membrane cover 3 forms finished product.If supplied materials pipe wall unevenness is even, in the process that pipe is stretched
In, because pipe wall thickness difference generate circumferential stress difference can drive in die sleeve 3 around drawing die sleeve 2 central axis rotate, it is interior
Rolling friction is become from sliding friction between die sleeve 3 and pipe, to reduce the axial friction that pipe is subject to during the drawing process,
It is more uniformly stressed pipe itself, pipe is effectively reduced and is broken because of eccentric, so that drawing production cost is reduced,
Rolling friction simultaneously can also promote the material at wall thickness to flow to the thin place of wall to improve drawing so that the wall thickness of finished product is more uniform
The quality of product afterwards；Finally, due to which interior die sleeve 3 can generate rotation under the action of circumferential stress difference, therefore avoid circumferential direction
It is damaged caused by the internal die sleeve 3 of stress difference, improves the service life of drawing mould.
First bearing 4 and second bearing 5 in the present embodiment are self-aligning thrust roller bearing.It is designed in this way, Neng Gouyun
Perhaps interior die sleeve 3 generates radial shake according to the wall thickness difference of pipe and realizes that automatic aligning is further mentioned with compensating coaxial degree error
The high evenness of wall thickness of finished product.
It is understood that deep groove ball bearing or self-aligning ball bearing also can be used in those skilled in the art, as long as being able to achieve
The bearing for enabling interior die sleeve to rotate relative to drawing die sleeve is each fallen in the protection scope of the utility model, and this will not be detailed here.
In order to be further ensured that the uniform wall thickness of finished product, the quality of finished product is improved.Drawing die sleeve in the present embodiment
Axis, the axis of interior die sleeve, the axis of first bearing 4 and second bearing 5 axis be overlapped.
In addition, in order to avoid generating frictional resistance between drawing die sleeve 2 when the rotation of interior die sleeve 3, it is interior in the present embodiment
Die sleeve 3 and 2 clearance fit of drawing die sleeve.In this way, just can ensure that interior die sleeve 3 can rotate under the action of circumferential stress difference
Get up, so as to improve the evenness of wall thickness of finished product.
Finally, in order to ensure being arranged concentrically between drawing die sleeve 2 and stretching trolley, the stretching-machine motherboard in the present embodiment
Medial surface is the conical surface 11 with drawing die sleeve lateral surface cone match, the radius of the conical surface 11 along tubing feeding direction (this reality
Apply the direction that the feeding direction in example is right-to-left) it is gradually reduced.In this way, also be avoided that in drawing process, stretching-machine
Motherboard 1 and drawing die sleeve 2 are detached from, while assembling in this way, can also be convenient for the quick-replaceable of later period drawing mould.Drawing die sleeve 2
Peripheral side is additionally provided with limited step, when the right end of limited step and stretching-machine motherboard 1 offsets, the left side of drawing die sleeve 2 and drawing
The left side for stretching machine motherboard 1 is concordant.
It is understood that stretching-machine motherboard structure can be not provided in order to simplify the structure of tube-drawing mold, directly will
Drawing die sleeve is fixed on stretching-machine.
It should be noted that the tube-drawing mold in the utility model can also be used in the drawing molding of bar,
The basic effect of the present embodiment can be reached, this will not be detailed here.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, being familiar with the those skilled in the art should be understood that the utility model includes but is not limited to attached drawing and specific embodiment party above
Content described in formula.The modification of any function and structure principle without departing from the utility model is intended to be included in claims
Range in.
Claims (6)
1. a kind of tube-drawing mold, including drawing die sleeve and interior die sleeve, the interior die sleeve is installed on the inside of the drawing die sleeve,
It is characterized in that, the tube-drawing mold further includes bearing, the bearing is mounted on the interior die sleeve and the drawing die sleeve
Between, so that the interior die sleeve can rotate under the effect of circumferential stress difference.
2. tube-drawing mold according to claim 1, which is characterized in that the peripheral side of the interior die sleeve be equipped with it is radial to
The fixed plate extended to form outside, one end of the drawing die sleeve are equipped with end cap flange, also set on the inner sidewall of the drawing die sleeve
There is positioning step, the bearing includes first bearing and second bearing, and the first bearing is installed in the positioning step and institute
It states between the side of fixed plate, the second bearing is installed between the other side of the fixed plate and the end cap flange.
3. tube-drawing mold according to claim 2, which is characterized in that the first bearing and the second bearing are equal
For self-aligning thrust roller bearing.
4. tube-drawing mold according to claim 3, which is characterized in that the interior die sleeve and the drawing die cover gap
Cooperation.
5. tube-drawing mold according to claim 1, which is characterized in that the tube-drawing mold further includes stretching-machine
Motherboard, the stretching-machine motherboard are set with the drawing die and put on, and the medial surface of the stretching-machine motherboard is and the drawing die sleeve
The radius of the conical surface of lateral surface cone match, the conical surface is gradually reduced along the feeding direction of tubing.
6. tube-drawing mold according to claim 1, which is characterized in that the axis of the drawing die sleeve, interior die sleeve
The axis of axis and the bearing is overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695534.4U CN208390676U (en) | 2018-05-10 | 2018-05-10 | A kind of tube-drawing mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695534.4U CN208390676U (en) | 2018-05-10 | 2018-05-10 | A kind of tube-drawing mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208390676U true CN208390676U (en) | 2019-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820695534.4U Active CN208390676U (en) | 2018-05-10 | 2018-05-10 | A kind of tube-drawing mold |
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| Country | Link |
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| CN (1) | CN208390676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555045A (en) * | 2018-05-10 | 2018-09-21 | 浙江海亮股份有限公司 | A kind of tube-drawing mold |
-
2018
- 2018-05-10 CN CN201820695534.4U patent/CN208390676U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555045A (en) * | 2018-05-10 | 2018-09-21 | 浙江海亮股份有限公司 | A kind of tube-drawing mold |
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