CN209334466U - It is a kind of for squeezing the mold insert structure of spline - Google Patents
It is a kind of for squeezing the mold insert structure of spline Download PDFInfo
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- CN209334466U CN209334466U CN201821609195.XU CN201821609195U CN209334466U CN 209334466 U CN209334466 U CN 209334466U CN 201821609195 U CN201821609195 U CN 201821609195U CN 209334466 U CN209334466 U CN 209334466U
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- mold core
- tightening sleeve
- spline
- mold
- wall
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Abstract
The utility model proposes a kind of for squeezing the mold insert structure of spline comprising: pre-tightening sleeve is formed through the accommodating chamber of the pre-tightening sleeve in the pre-tightening sleeve；Mold core, the mold core interference are press-fitted in the accommodating chamber of the pre-tightening sleeve, and the tooth form extrusion chamber of the mold core is formed through in the mold core, is formed with the tooth-shape structure to match with the structure of spline to be formed on the inner wall of the tooth form extrusion chamber.The utility model proposes for squeezing the mold insert structure of spline, have the support of pre-tightening sleeve on the outside of mold core, therefore in extrusion process, mold core, which will not generate, extends out deformation, to guarantee the external splines Forming Quality of male splined shaft.
Description
Technical field
The utility model relates to precision metals to forge field, in particular to a kind of for squeezing the mold insert structure of spline.
Background technique
Male splined shaft includes axis body and forms external splines of the son on the outside of axis body, and the external splines is actually a circle tooth
Shape structure.
In the prior art, the external splines is generally squeezed out in the outside of axis body using external splines crowded teeth mold, it is outer to realize
The molding of splined shaft.Since the extruding force during crowded spline is very big, the general not shape directly in the die cavity of interior mold
At the tooth-shape structure that the structure in external splines matches, but it is prefabricated using special material according to the structure of external splines to be formed
Hard mold core, and special coating treatment is carried out further to promote its hardness to mold core, be formed in the mold core at
The tooth form extrusion chamber that the structure of the external splines of shape matches.
When needing to carry out external splines extrusion forming, prefabricated corresponding mold core is installed to the mould of external splines crowded teeth mold
It is intracavitary to obtain the tooth form extrusion chamber to match with the structure of external splines to be formed.Finally completed through the tooth form extrusion chamber
The extrusion molding of external splines.As it can be seen that main stressed member is replaceable mold core in extrusion process.
The small volume of mold core, and its wall thickness is relatively thin.Therefore in extrusion process, mold core is easy to expand outwardly deformation, from
And the structure of the external splines squeezed out and dimensional accuracy is caused to be difficult to reach pre-provisioning request.
Drawbacks described above existing for mold core in view of crowded spline in the prior art, it is necessary to develop a kind of novel crowded spline
Mold insert structure, to guarantee the external splines Forming Quality of male splined shaft.
Utility model content
To achieve the above object, the utility model provides a kind of for squeezing the mold insert structure of spline, particular technique side
Case is as follows:
It is a kind of for squeezing the mold insert structure of spline comprising:
Pre-tightening sleeve is formed through the accommodating chamber of the pre-tightening sleeve in the pre-tightening sleeve；
Mold core, the mold core interference are press-fitted in the accommodating chamber of the pre-tightening sleeve, are formed through in the mold core described
The tooth form extrusion chamber of mold core is formed with the tooth form to match with the structure of spline to be formed on the inner wall of the tooth form extrusion chamber
Structure.
In certain embodiments, the lower end inner wall of the accommodating chamber is recessed inwardly to be formed with first step portion, institute
The lower end outer wall for stating mold core is outwardly protruded to form the second step portion to match with the first step portion；Outside the mold core
Wall and the inner wall of the accommodating chamber fit closely, the second step portion of the mold core lower end and the institute of the accommodating chamber lower end
First step portion is stated closely to be engaged.
In some specific implementations, the wall thickness of the pre-tightening sleeve is 3 to 5 times of the wall thickness of the mold core.
The utility model proposes for squeezing the mold insert structure of spline comprising pre-tightening sleeve and interference are press-fitted in pre-tightening sleeve
Mold core, be formed with tooth form extrusion chamber in the mold core.Since there is the support of pre-tightening sleeve in its outside, in extrusion process, mould
Core, which will not generate, extends out deformation, to guarantee the external splines Forming Quality of male splined shaft.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, will be needed below to described in embodiment description
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.Wherein:
Fig. 1 is provided by the utility model for squeezing the structural schematic diagram of the mold insert structure of spline；
Fig. 2 is the structural schematic diagram of the pre-tightening sleeve in Fig. 1；
Fig. 3 is the structural schematic diagram of the mold core in Fig. 1；
The internal structure chart of mold core in Fig. 4 Fig. 3.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
As shown in Figures 1 to 4, provided by the utility model for squeeze the mold insert structure of spline to include pre-tightening sleeve 1 and mold core
2.Wherein: the accommodating chamber 11 of the pre-tightening sleeve 1 is formed through in the pre-tightening sleeve 1.2 interference of mold core is press-fitted to described pre-
In fixed 1 accommodating chamber 11, the tooth form extrusion chamber 21 of the mold core 2, the tooth form extrusion chamber are formed through in the mold core 2
Inner wall on be formed with the tooth-shape structure 23 to match with the structure of spline to be formed.
In order to further enhance the bonding strength between the pre-tightening sleeve 1 and the mold core 2, in some embodiments, institute
The lower end inner wall for stating accommodating chamber 11 is recessed inwardly to be formed with first step portion 12, and the lower end outer wall of the mold core 2 outwardly protrudes
To form the second step portion 22 to match with the first step portion 12.The outer wall of the mold core 2 and the accommodating chamber 11
Inner wall fits closely, the first step in the second step portion 22 of 2 lower end of mold core and 11 lower end of accommodating chamber
Portion 1 is closely engaged.
When needing to carry out external splines extrusion forming, the utility model is installed to the die cavity of external splines crowded teeth mold,
Then the axis body of spline to be squeezed is inserted into the accommodating chamber 11, is pressed down against axis body, axis body moves down until its end
It is contradicted with the mold core 2.Continue to be pressed down against, the end material of axis body flows downward and is squeezed into the tooth form of the mold core 2
In extrusion chamber 21, to realize the extrusion forming of external splines.
Due to having the pre- compact schemes of pre-tightening sleeve 1 on the outside of mold core 2, therefore in extrusion process, mold core 2 will not be generated and be extended out
Deformation, to guarantee the external splines Forming Quality of male splined shaft.
Certainly, in order to guarantee the support strength of pre-tightening sleeve 1, generally the wall thickness of pre-tightening sleeve 1 is arranged thicker.Such as some
In embodiment, the wall thickness of the pre-tightening sleeve 1 is 5 times of 3 value of the thickness of the mold core 2.
In certain embodiments, the assembling process of the mold insert structure of the utility model is as follows: first by undressed tooth
The mold core of shape structure is press-fitted in pre-tightening sleeve, is press-fitted and is press-fitted for interference, press-fitting amount is about 0.1mm.After press-fitting, mold core and pre-tightening sleeve
An integrated member is formed, processes tooth-shape structure on the inner wall of mold core then to form the mold core knot with tooth form extrusion chamber
Structure.Certainly, in order to further increase the hardness of pre-tightening sleeve, the bulk life time of mold insert structure is promoted, it can also be in the table of pre-tightening sleeve
Face prepares coating.
The description with certain particularity detailed enough has been carried out to the utility model above.It is common in fields
It is to be understood by the skilled artisans that the description in embodiment is only exemplary, without departing from the utility model true spirit and
All changes are made under the premise of range all should belong to the protection scope of the utility model.The utility model is claimed
Range is to be defined by described claims, rather than limited by the foregoing description in embodiment.
Claims (3)
1. a kind of for squeezing the mold insert structure of spline, characterized in that it comprises:
Pre-tightening sleeve is formed through the accommodating chamber of the pre-tightening sleeve in the pre-tightening sleeve；
Mold core, the mold core interference are press-fitted in the accommodating chamber of the pre-tightening sleeve, and the mold core is formed through in the mold core
Tooth form extrusion chamber, be formed with the tooth form knot to match with the structure of spline to be formed on the inner wall of the tooth form extrusion chamber
Structure.
2. mold insert structure as described in claim 1, it is characterised in that:
The lower end inner wall of the accommodating chamber is recessed inwardly to be formed with first step portion, and the lower end outer wall of the mold core outwardly protrudes
To form the second step portion to match with the first step portion；
The outer wall of the mold core and the inner wall of the accommodating chamber fit closely, the second step portion of the mold core lower end and institute
The first step portion for stating accommodating chamber lower end is closely engaged.
3. mold insert structure as described in claim 1, which is characterized in that the wall thickness of the pre-tightening sleeve is the wall thickness of the mold core
3 to 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821609195.XU CN209334466U (en) | 2018-09-30 | 2018-09-30 | It is a kind of for squeezing the mold insert structure of spline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821609195.XU CN209334466U (en) | 2018-09-30 | 2018-09-30 | It is a kind of for squeezing the mold insert structure of spline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209334466U true CN209334466U (en) | 2019-09-03 |
Family
ID=67746103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821609195.XU Active CN209334466U (en) | 2018-09-30 | 2018-09-30 | It is a kind of for squeezing the mold insert structure of spline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209334466U (en) |
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2018
- 2018-09-30 CN CN201821609195.XU patent/CN209334466U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200624 Address after: No.19, Shenfeng North Road, Dafeng District, Yancheng City, Jiangsu Province Patentee after: JIANGSU LIKEN TECHNOLOGY Co.,Ltd. Address before: 224100 road 3, Yancheng City economic and Technological Development Zone, Dafeng District, Jiangsu Patentee before: YANCHENG YUQI MACHINERY MANUFACTURING Co.,Ltd. |