CN208275957U - A kind of cold extrusion shaft member hard alloy combined die - Google Patents
A kind of cold extrusion shaft member hard alloy combined die Download PDFInfo
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- CN208275957U CN208275957U CN201820561821.6U CN201820561821U CN208275957U CN 208275957 U CN208275957 U CN 208275957U CN 201820561821 U CN201820561821 U CN 201820561821U CN 208275957 U CN208275957 U CN 208275957U
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- combined die
- shaft member
- cold extrusion
- hard alloy
- mold core
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Abstract
The utility model relates to cold extrusion die technical fields, disclose a kind of cold extrusion shaft member hard alloy combined die, including fission and the multistage combined die structure that sets gradually, every section of combined die structure includes mold core, the prestressing force inner ring being coated on the outside of the mold core and the prestressing force outer ring being coated on the outside of the prestressing force inner ring, die cavity is set inside the mold core, and the die cavity of combined die structure described in multistage is connected.The utility model proposes cold extrusion shaft member hard alloy combined die include fission and the multistage combined die structure set gradually, prestressing force inner ring and prestressing force outer ring is arranged in every section of combined die structure on the outside of mold core, it can satisfy requirement of the large deformation cold extrusion shaft member to combined die intensity and high resistance against wear performance, combined die is able to bear biggish load, and realization is more than the extruding of 30% axis class cold-extruded part to reduction of area.
Description
Technical field
The utility model relates to cold extrusion die technical fields more particularly to a kind of cold extrusion shaft member to be combined with hard alloy
Cavity plate.
Background technique
Cold extrusion is exactly that metal blank is placed in cold extrusion die cavity, at room temperature, passes through punch-pin fixed on press machine
Apply pressure to blank, metal blank is made to generate plastic deformation and the processing method of obtained part.Since cold-extrusion technology has
The big feature of extruding force requires the structure setting of Combined Dies for Cold Extrusion high.
By taking input shaft, output shaft precision cold-extruded part combined die in automobile gearbox as an example, it is usually applicable only to break
The case where reduction of area lapse rate is less than 30%, in the case where reduction of area is more than 30%, sharply due to combined die stress load
Increase, combined die is easy to generate abrasion and cracking phenomena.
Utility model content
The purpose of this utility model is that proposing a kind of cold extrusion shaft member hard alloy combined die, solve existing cold
Extrusion and combination die when end face economy is more than 30%, combined die be easy to produce abrasion and cracking the problem of.
For this purpose, the utility model uses following technical scheme:
A kind of cold extrusion shaft member hard alloy combined die, including fission and the multistage combined die knot that sets gradually
Structure, every section of combined die structure include mold core, the prestressing force inner ring being coated on the outside of the mold core and are coated on described pre- answer
Die cavity is arranged in prestressing force outer ring on the outside of power inner ring, the mold core inside, and the die cavity of combined die structure described in multistage is connected.
The cold extrusion shaft member hard alloy combined die includes fission and the multistage combined die structure set gradually, often
Prestressing force inner ring and prestressing force outer ring is arranged in section combined die structure on the outside of mold core, can satisfy large deformation cold-extruded last item
Requirement of the part to combined die intensity and high resistance against wear performance, combined die are able to bear biggish load, realize and contract to section
Lapse rate is more than the extruding of 30% axis class cold-extruded part.
It is seperated and set gradually more as a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die
Section combined die structure is the first combined die structure, the second combined die structure and third combined die structure.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the third combined die knot
The modular angle that enters of structure is 30 ° -90 °.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the length of the combined die
Greater than the length of the part to be laminated, the both ends of the part to be laminated are recessed in the combined die.So that entire shaft member
The phenomenon that being put into combined die, can be avoided part bar portion free compression to be laminated generation.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the mold core pre- is answered with described
Press-fitting angle between power inner ring and between the prestressing force inner ring and the prestressing force outer ring is 1 °, and pressing amount is in 0.2%-
0.6%.Above-mentioned setting forms interference fit so that mold core and prestressing force inner ring between prestressing force inner ring and prestressing force outer ring.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the two neighboring combination is recessed
The end face of the mold core of at least one combined die structure of mode structure is equipped with the groove extended along the combined die radial direction.
The gas that the setting of groove can be discharged in the die cavity of mold core, avoids feeling suffocated.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the first combined die knot
The internal diameter of the one end of the mold core of structure far from the second combined die structure is greater than the internal diameter of the other end.The structure both facilitates shaft member
It places in die cavity, is also beneficial to the disassembly of shaft member.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the third combined die knot
Work belt is arranged in structure, and the work belt is provided with gap after work belt far from the side of the second combined die structure.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the height H of the work belt
For 3mm-5mm, gap diameter is 0.15mm-0.20mm bigger than the diameter of the work belt after the work belt.The setting of work belt subtracts
Lack the impact force to combined die, further extends the service life of combined die.
As a kind of preferred embodiment of above-mentioned cold extrusion shaft member hard alloy combined die, the mold core is closed using hard
Gold is made.
The utility model has the beneficial effects that
The utility model proposes cold extrusion shaft member hard alloy combined die, including fission and the multistage that sets gradually
Prestressing force inner ring and prestressing force outer ring is arranged in combined die structure, every section of combined die structure on the outside of mold core, can satisfy big
Requirement of the deformation extent cold extrusion shaft member to combined die intensity and high resistance against wear performance, combined die are able to bear biggish load
Lotus, realization are more than the extruding of 30% axis class cold-extruded part to reduction of area.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cold extrusion shaft member hard alloy combined die provided by the utility model；
Fig. 2 is the cross-sectional view of the first combined die structure provided by the utility model；
Fig. 3 is the top view of the first combined die structure provided by the utility model；
Fig. 4 is the cross-sectional view of third combined die structure provided by the utility model.
In figure:
1, the first combined die structure；11, the first mold core；111, the first die cavity；12, the first prestressing force inner ring；13, first
Prestressing force outer ring；14, the first groove；
2, the second combined die structure；21, the second mold core；22, the second prestressing force inner ring；23, the second prestressing force outer ring；
3, third combined die structure；31, third mold core；311, third die cavity；32, third prestressing force inner ring；33, third
Prestressing force outer ring；34, work belt；35, gap after work belt；
4, part to be laminated.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Present embodiment provides a kind of cold extrusion shaft member hard alloy combined die, as shown in Figure 1, cold extrusion shaft member is used
Hard alloy combined die includes fission and the multistage combined die structure set gradually, and every section of combined die structure includes mould
Core, the prestressing force inner ring being coated on the outside of mold core and the prestressing force outer ring being coated on the outside of prestressing force inner ring, the setting of mold core inside
The die cavity of die cavity, multistage combined die structure is connected.Cold extrusion shaft member hard alloy combined die include it is seperated and according to
The multistage combined die structure of secondary setting, every section of combined die structure are arranged outside prestressing force inner ring and prestressing force on the outside of mold core
Circle, can satisfy requirement of the large deformation cold extrusion shaft member to combined die intensity and high resistance against wear performance, combined die energy
Biggish load is enough born, realization is more than the extruding of 30% axis class cold-extruded part to reduction of area.Two neighboring combination is recessed
The end face of the mold core of at least one combined die structure of mode structure is equipped with the groove extended along combined die radial direction, can
The gas in the die cavity of mold core is discharged, avoids feeling suffocated.
In the present embodiment, mold core uses hard alloy, and hardness is greater than HRA85, and prestressing force inner ring uses hot die steel, firmly
Degree uses hot die steel in HRC50-52, prestressing force outer ring, and hardness is in HRC45-48.The cold extrusion shaft member of the utility model is used
Hard alloy combined die can be applied to input shaft in automobile gearbox, output shaft precision cold extrusion combined die.
As shown in Figure 1, the length of cold extrusion shaft member hard alloy combined die is greater than the length of part 4 to be laminated, wait press
The both ends of component 4 are recessed in combined die, and entire part 4 to be laminated is put into combined die, can be avoided 4 bar of part to be laminated
The phenomenon that portion's free compression, occurs.
Between the mold core and prestressing force inner ring of every section of combined die structure and between prestressing force inner ring and prestressing force outer ring
Press-fitting angle be 1 °, pressing amount is in 0.2%-0.6%.Above-mentioned setting so that mold core and prestressing force inner ring, prestressing force inner ring with
Interference fit is formed between prestressing force outer ring.
Further, as shown in Figure 1, combined die is seperated and the multistage combined die that sets gradually is the first combined die
Structure 1, the second combined die structure 2 and third combined die structure 3.First combined die structure 1, the second combined die structure
2 are connected with the die cavity of the mold core of third combined die structure 3, and part 4 to be laminated is worn in die cavity.
First combined die structure 1 includes the first mold core 11, the first prestressing force inner ring for being coated on 11 outside of the first mold core
12 and it is coated on the first prestressing force outer ring 13 in the outside of the first prestressing force inner ring 12.As shown in Fig. 2, the first mold core 11 is along axial direction
The first die cavity 111 is arranged in direction, and the one end of the first mold core 11 far from the second combined die structure 2 is arrival end, and the other end is
Mouth end, the internal diameter of the first die cavity 111 of arrival end are greater than the internal diameter of the other end, and part 4 to be laminated had both been facilitated to be pressed into the first die cavity 111
It is interior, it is also beneficial to the disassembly of part 4 to be laminated.Preferably, first die cavity of the internal diameter of the first die cavity 111 of arrival end than outlet end
111 big 0.10mm of internal diameter Φ D or so.The internal diameter of first die cavity 111 is gradually reduced from arrival end to outlet end.
The ratio Φ A/ of the internal diameter Φ D of the outer diameter Φ A and the first mold core 11 of first mold core 11 of the first combined die structure 1
Φ D is between 1.6-2.2.First mold core, 11 inner surface does polishing treatment, and roughness reaches Ra0.04, outer diameter and end face ruler
Line position tolerance is within 0.02mm between very little.As shown in figure 3, the first groove 14 is arranged in the end face of the first mold core 11, can be discharged
Gas in first die cavity 111 of the first mold core 11, avoids feeling suffocated.Further, the end face of the first mold core 11 is circumferentially uniformly distributed more
A first groove 14, in the present embodiment, the end face of the first mold core 11 is circumferentially evenly distributed with three the first grooves 14, and exhaust is better achieved
Effect.Groove can also be set in the end face of the mold core of the second combined die structure 2 and third combined die structure 3.
Second combined die structure 2 includes the second mold core 21, the second prestressing force inner ring for being coated on 21 outside of the second mold core
22 and it is coated on the second prestressing force outer ring 23 in the outside of the second prestressing force inner ring 22, the second mold core 21 is in axial direction arranged the
Two die cavitys, the diameter of the second die cavity are Φ D.
As shown in Figure 1 and Figure 4, third combined die structure 3 includes third mold core 31, is coated on 31 outside of third mold core
Third prestressing force inner ring 32 and the third prestressing force outer ring 33 for being coated on 32 outside of third prestressing force inner ring, 31 edge of third mold core
Third die cavity 311 is in axial direction set.The modular angle that enters of third combined die structure 3 is 30 ° -90 °, can reduce forming process
In resistance of deformation.Preferably, in the present embodiment, entering modular angle is 60 °, and the deformation that can utmostly mitigate in forming process is anti-
Power.
Work belt 34 is arranged in third combined die structure 3, and work belt 34 is arranged far from the side of the second combined die structure 2
There is gap 35 after work belt.The height H of work belt 34 is 3mm-5mm, diameter of phi of the 35 diameter of phi C of gap than work belt 34 after work belt
The big 0.15mm-0.20mm of B.The setting of work belt 34 reduces the impact force to combined die, further extends combined die
Service life.31 inner surface of third mold core does polishing treatment, and roughness reaches Ra0.04, outer diameter and each size in end face it
Between geometric tolerance within 0.02mm.
Note that above are only the preferred embodiment of the utility model.It will be appreciated by those skilled in the art that the utility model is not
It is limited to specific embodiment described here, is able to carry out various apparent variations, readjustment for a person skilled in the art
With substitution without departing from the protection scope of the utility model.Therefore, although being carried out by above embodiments to the utility model
It is described in further detail, but the utility model is not limited only to above embodiments, is not departing from the utility model design
In the case of, it can also include more other equivalent embodiments, and the scope of the utility model is determined by scope of the appended claims
It is fixed.
Claims (10)
1. a kind of cold extrusion shaft member hard alloy combined die, which is characterized in that including fission and the multistage group that sets gradually
Cavity die structure is closed, every section of combined die structure includes mold core, the prestressing force inner ring being coated on the outside of the mold core and is coated on
Die cavity, the mould of combined die structure described in multistage is arranged in prestressing force outer ring on the outside of the prestressing force inner ring, the mold core inside
Chamber is connected.
2. cold extrusion shaft member hard alloy combined die according to claim 1, which is characterized in that seperated and successively set
The multistage combined die structure set is the first combined die structure (1), the second combined die structure (2) and third combined die knot
Structure (3).
3. cold extrusion shaft member hard alloy combined die according to claim 2, which is characterized in that the third combination
The modular angle that enters of cavity die structure (3) is 30 ° -90 °.
4. cold extrusion shaft member hard alloy combined die according to claim 1, which is characterized in that the length of combined die
Degree is greater than the length of part to be laminated (4), and the both ends of the part (4) to be laminated are recessed in the combined die.
5. cold extrusion shaft member hard alloy combined die according to claim 1, which is characterized in that the mold core and institute
Stating the press-fitting angle between prestressing force inner ring and between the prestressing force inner ring and the prestressing force outer ring is 1 °, and pressing amount exists
0.2%-0.6%.
6. cold extrusion shaft member hard alloy combined die according to claim 1, which is characterized in that two neighboring described
The end face of the mold core of at least one combined die structure of combined die structure is equipped with to be extended along the combined die radial direction
Groove.
7. cold extrusion shaft member hard alloy combined die according to claim 2, which is characterized in that first combination
The internal diameter of the one end of the mold core of cavity die structure (1) far from the second combined die structure (2) is greater than the internal diameter of the other end.
8. cold extrusion shaft member hard alloy combined die according to claim 2, which is characterized in that the third combination
Work belt (34) are arranged in cavity die structure (3), and the work belt (34) is arranged far from the side of the second combined die structure (2)
There is gap (35) after work belt.
9. cold extrusion shaft member hard alloy combined die according to claim 8, which is characterized in that the work belt
(34) height H is 3mm-5mm, and gap (35) diameter is 0.15mm- bigger than the diameter of the work belt (34) after the work belt
0.20mm。
10. cold extrusion shaft member hard alloy combined die according to claim 1, which is characterized in that the mold core is adopted
It is made of hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820561821.6U CN208275957U (en) | 2018-04-19 | 2018-04-19 | A kind of cold extrusion shaft member hard alloy combined die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820561821.6U CN208275957U (en) | 2018-04-19 | 2018-04-19 | A kind of cold extrusion shaft member hard alloy combined die |
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| CN208275957U true CN208275957U (en) | 2018-12-25 |
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| CN201820561821.6U Active CN208275957U (en) | 2018-04-19 | 2018-04-19 | A kind of cold extrusion shaft member hard alloy combined die |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967637A (en) * | 2019-04-10 | 2019-07-05 | 江铃集团山东华岳车辆部件有限公司 | A kind of central siphon molding machine |
| CN112916780A (en) * | 2020-12-29 | 2021-06-08 | 铭昊汽车金属零部件(广州)有限公司 | Automobile parts cold-heading forming die |
| CN113399486A (en) * | 2021-06-17 | 2021-09-17 | 西北工业大学 | Multi-section cold extrusion strengthening device and use method thereof |
-
2018
- 2018-04-19 CN CN201820561821.6U patent/CN208275957U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967637A (en) * | 2019-04-10 | 2019-07-05 | 江铃集团山东华岳车辆部件有限公司 | A kind of central siphon molding machine |
| CN112916780A (en) * | 2020-12-29 | 2021-06-08 | 铭昊汽车金属零部件(广州)有限公司 | Automobile parts cold-heading forming die |
| CN113399486A (en) * | 2021-06-17 | 2021-09-17 | 西北工业大学 | Multi-section cold extrusion strengthening device and use method thereof |
| CN113399486B (en) * | 2021-06-17 | 2022-04-22 | 西北工业大学 | Multi-section cold extrusion strengthening device and use method thereof |
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