CN210387405U - Tool die for hot forging and cold forging composite distribution plastic forming - Google Patents
Tool die for hot forging and cold forging composite distribution plastic forming Download PDFInfo
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- CN210387405U CN210387405U CN201920936588.XU CN201920936588U CN210387405U CN 210387405 U CN210387405 U CN 210387405U CN 201920936588 U CN201920936588 U CN 201920936588U CN 210387405 U CN210387405 U CN 210387405U
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Abstract
The utility model discloses a tooling die for hot forging and cold forging composite distribution plastic forming, which belongs to the field of tooling dies and comprises a hot upsetting die, a hot upsetting forming die, a hot upsetting punching die and a cold forging die for forging gear blanks; the hot upsetting and upsetting die comprises an upsetting upper die and an upsetting lower die; the hot-heading forming die comprises a hot-forging upper die, a hot-forging lower die sleeve, a hot-forging lower die insert, a hot-forging lower die core and a base plate; the hot heading and punching die comprises a punching punch, a stripper plate and a punching female die; the cold forging die comprises a cold forging punch, a cold forging end cover and a cold forging base; a first channel is formed in a gap between the hot forging lower die sleeve and the hot forging lower die insert, and a second channel is formed in a gap between the hot forging lower die insert and the base plate; the hot forging lower die insert is provided with a first vent hole, and the second channel is communicated with the first channel through the first vent hole, so that the striking force required by cold forging is reduced, and the working procedure can be completed by using small equipment; the formed dimension has high precision and good surface roughness, and meets the technical requirements.
Description
Technical Field
The utility model relates to a tooling die field especially relates to a tooling die that is used for hot forging cold forging composite distribution plasticity to take shape.
Background
The cold forging is a forming process with the recrystallization temperature of the materials below and is characterized in that: the size precision is high, and surface roughness is good, and working condition is good, and production efficiency is high, and hot forging is to the shaping processing above the material recrystallization temperature, and the characteristics are: the deformation resistance of metal is reduced, the cast structure of a steel ingot is changed, and the plasticity of steel is improved, which is particularly important for some high alloy steels which are brittle at low temperature and difficult to forge and press; a hot forging-cold forging composite plastic forming technology is a new precise metal forming process combining hot forging and cold forging, which fully utilizes the respective advantages of hot forging and cold forging, namely good metal plasticity and low flow stress in a hot state, so that the main deformation process is completed by hot forging; the precision of the cold forging is high, so the important size of the part is finally formed by the cold forging process.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a tooling die for hot forging and cold forging composite distribution plastic forming, which fully utilizes the advantages of good metal plasticity and low flow stress in the respective hot states of hot forging and cold forging, and completes the main thermal deformation process of a gear blank in the hot forging process; the oil groove of the gear blank is formed by hot forging and cold forging step by step, compared with the direct cold forging of forming the oil groove, the striking force required by cold forging is reduced, and the working procedure can be completed through small equipment; the cold forging forming has high dimensional accuracy and good surface roughness, and meets the technical requirements.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a tooling die for hot forging and cold forging composite distribution plastic forming, which comprises a hot upsetting die, a hot upsetting forming die, a hot upsetting punching die and a cold forging die for forging gear blanks;
the hot upsetting and upsetting die comprises an upsetting upper die and an upsetting lower die positioned below the upsetting upper die; the upper middle part of the upsetting upper die is fixedly connected with a power output end of the hot header through a bolt;
the hot-forging forming die comprises a hot-forging upper die, a hot-forging lower die sleeve positioned below the hot-forging upper die, a hot-forging lower die insert embedded in an inner cavity of the hot-forging lower die sleeve, a hot-forging lower die core fixedly arranged in an inner cavity of the hot-forging lower die insert, and a base plate for connecting the hot-forging lower die core;
the hot heading and punching die comprises a punching punch, a stripper plate and a punching female die;
the cold forging die comprises a cold forging punch, a cold forging end cover and a cold forging base, wherein the cold forging end cover is arranged in an inverted mode, and the cross section of the cold forging end cover is U-shaped; the cold forging end cover is reversely buckled on the cold forging base;
the middle part of the bottom of the hot forging lower die core is provided with a convex part, and the middle part of the upper end of the backing plate is provided with a groove matched with the convex part;
a first channel is formed in a gap between the inner wall of the hot forging lower die sleeve and the outer side wall of the bottom wall of the hot forging lower die insert, and a second channel is formed in a gap between the inner side wall of the bottom of the hot forging lower die insert and the outer wall of the upper end of the base plate; the side wall of the bottom wall of the hot forging lower die insert is provided with a plurality of first vent holes, the second channel is communicated with the first channel through the first vent holes, and the side wall of the base plate is provided with a second vent hole which is used for communicating the first channel with the external atmosphere;
and the gear blank is sequentially subjected to hot upsetting and upsetting die, hot upsetting and forming die, hot upsetting and punching die and cold forging die and is formed.
Optionally, the height of the axial center line of the second vent hole relative to the bottom end face of the backing plate is greater than the height of the axial center line of the first vent hole relative to the bottom end face of the backing plate.
Optionally, an internal threaded hole is formed in the hot forging lower die sleeve, a connecting hole coaxial with the internal threaded hole is formed in the backing plate, and the hot forging lower die sleeve is connected with the backing plate through a bolt.
Optionally, an annular positioning portion for positioning the hot forging lower die insert is arranged on the outer wall of the hot forging lower die sleeve.
Optionally, the diameter of the second vent hole is larger than the diameter of the first vent hole.
The utility model has the advantages that:
the utility model provides a tooling die for hot forging and cold forging composite distribution plastic forming, which fully utilizes the advantages of good metal plasticity and low flow stress in the respective hot states of hot forging and cold forging, and completes the main thermal deformation process of a gear blank in the hot forging process; the oil groove of the gear blank is formed by hot forging and cold forging step by step, compared with the direct cold forging of forming the oil groove, the striking force required by cold forging is reduced, and the working procedure can be completed through small equipment; the cold forging forming has high dimensional accuracy and good surface roughness, and meets the technical requirements.
Drawings
FIG. 1 illustrates a hot forging upsetting die according to an embodiment of the present invention;
fig. 2 is a hot forging forming die according to an embodiment of the present invention;
fig. 3 is a hot forging and punching die according to an embodiment of the present invention;
fig. 4 is a cold forging die provided by the embodiment of the present invention.
In the figure:
1. upsetting the upper die; 2. upsetting the lower die; 3. hot forging the upper die; 4. hot forging the lower die sleeve; 5. hot forging the lower die insert; 6. hot forging the lower mold core; 7. a base plate; 8. punching a hole; 9. a stripper plate; 10. punching a female die; 11. Cold forging the punch; 12. cold forging the end cover; 13. and (5) cold forging the base.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 4, a tooling die for hot forging and cold forging composite distribution plastic forming comprises a hot upsetting die, a hot upsetting forming die, a hot upsetting punching die and a cold forging die for forging a gear blank; the hot upsetting and upsetting die comprises an upsetting upper die 1 and an upsetting lower die 2 positioned below the upsetting upper die 1; the middle part above the upsetting upper die 1 is fixedly connected with a power output end of a hot header through a bolt; the hot-heading forming die comprises a hot-forging upper die 3, a hot-forging lower die sleeve 4 positioned below the hot-forging upper die 3, a hot-forging lower die insert 5 embedded in the inner cavity of the hot-forging lower die sleeve 4, a hot-forging lower die core 6 fixedly arranged in the inner cavity of the hot-forging lower die insert 5 and a base plate 7 connected with the hot-forging lower die core 6; the hot heading and punching die comprises a punching punch 8, a stripper plate 9 and a punching female die 10; the cold forging die comprises a cold forging punch 11, a cold forging end cover 12 and a cold forging base 13, wherein the cold forging end cover 12 is arranged in an inverted mode and has a U-shaped cross section; the cold forging end cover 12 is reversely buckled on the cold forging base 13; the middle part of the bottom of the hot forging lower die core 6 is provided with a convex part, and the middle part of the upper end of the backing plate 7 is provided with a groove matched with the convex part; a first channel is formed in a gap between the inner wall of the hot forging lower die sleeve 4 and the outer side wall of the bottom wall of the hot forging lower die insert 5, and a second channel is formed in a gap between the inner side wall of the bottom of the hot forging lower die insert 5 and the outer wall of the upper end of the backing plate 7; a plurality of first vent holes are formed in the side wall of the bottom wall of the hot forging lower die insert 5, the second channel is communicated with the first channel through the first vent holes, and a second vent hole for communicating the first channel with the external atmosphere is formed in the side wall of the base plate 7; and the gear blank is sequentially subjected to hot upsetting and upsetting die, hot upsetting and forming die, hot upsetting and punching die and cold forging die and is formed.
Further, the height of the axial center line of the second vent hole relative to the bottom end face of the base plate 7 is larger than the height of the axial center line of the first vent hole relative to the bottom end face of the base plate 7, so that air in the die cavity can be better discharged.
Further, the hot forging lower die sleeve 4 is provided with an internal threaded hole, the backing plate 7 is provided with a connecting hole which is coaxial with the internal threaded hole, the hot forging lower die sleeve 4 is connected with the backing plate 7 through a bolt, the installation and the disassembly are convenient, the bottom end face of the backing plate 7 is flush with the bottom end face of the hot forging lower die sleeve 4, and the stability of the hot forging lower die sleeve 4 is ensured.
Furthermore, the outer wall of the hot forging lower die sleeve 4 is provided with an annular positioning part for positioning the hot forging lower die insert 5, so that the positioning and installation of the hot forging lower die insert 5 are better realized.
Further, the diameter of the second vent hole is larger than that of the first vent hole, so that backflow of air is prevented when the air is discharged outwards.
The specific working steps are as follows:
in the hot forging step: the heated bar stock is placed on an upsetting lower die 2, a hot forging machine works, the bar stock is upset to the maximum excircle size required by the process, and meanwhile, the oxide skin is removed; transferring the blank and putting the upset blank into a hot forging cavity consisting of a hot forging lower die sleeve 4, a hot forging lower die insert 5 and a hot forging lower die core 6, wherein the equipment works, and the blank forms a forge piece in the hot forging cavity; then the forging is put into the punching female die 10, the equipment works to finish the removal of the connecting skin of the forging, so that the hot forging process of the forging is finished, because the hitting speed of the forging equipment is too high, the air in the die cavity cannot escape in time, and great pressure is generated at the corner of the bottom of the die cavity, so that the forging is not filled fully, and the service life of the die is seriously influenced, an exhaust passage is arranged in the hot forging die cavity, more specifically, a first passage is formed by a gap between the inner wall of the hot forging lower die sleeve 4 and the outer wall of the bottom wall of the hot forging lower die insert 5, and a second passage is formed by a gap between the inner wall of the bottom of the hot forging lower die insert 5 and the outer wall of the upper end of the backing; a plurality of first vent holes are formed in the side wall of the bottom wall of the hot forging lower die insert 5, the second channel is communicated with the first channel through the first vent holes, and a second vent hole for communicating the first channel with the external atmosphere is formed in the side wall of the base plate 7; the air in the die cavity is discharged through the first channel and the second channel which are communicated with each other, so that the machining and forming quality of the forge piece is ensured, and the service life of the die is prolonged. And then the surface of the forge piece is strengthened through the heat treatment and shot blasting procedures, particularly, the forge piece surface is bombarded by the shot particles and the residual compressive stress is implanted, the fatigue strength of the forge piece is improved, and the mechanical strength, the wear resistance, the fatigue resistance, the corrosion resistance and the like of the forge piece can also be improved. And after the forging is subjected to heat treatment and shot blasting, performing cold forging on the forging. Specifically, the cold forging step: placing the forging on a cold forging base 13; placing the surface of the forged piece on the cold forging end cover 12; the equipment works to drive the cold forging punch 11, and the cold forging punch 11 continues to move downwards after being contacted with the cold forging end cover 12 until the oil groove of the gear is finally machined and formed, so that the product quality is reliable and stable.
In conclusion, the oil groove of the gear is formed by hot forging and cold forging step by step, compared with the method of directly cold forging the oil groove, the striking force required by cold forging is reduced, and the process can be completed by using small equipment; the formed dimension has high precision and good surface roughness, and meets the technical requirements.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (5)
1. The utility model provides a frock mould that is used for hot forging cold forging composite distribution plastic forming which characterized in that:
the forging die comprises a hot upsetting and upsetting die, a hot upsetting and forming die, a hot upsetting and punching die and a cold forging die which are used for forging a gear blank;
the hot upsetting and upsetting die comprises an upsetting upper die (1) and an upsetting lower die (2) positioned below the upsetting upper die (1); the middle part above the upsetting upper die (1) is fixedly connected with a power output end of a hot header through a bolt;
the hot-forging forming die comprises a hot-forging upper die (3), a hot-forging lower die sleeve (4) positioned below the hot-forging upper die (3), a hot-forging lower die insert (5) embedded in the inner cavity of the hot-forging lower die sleeve (4), a hot-forging lower die core (6) fixedly arranged in the inner cavity of the hot-forging lower die insert (5), and a base plate (7) used for connecting the hot-forging lower die core (6);
the hot heading and punching die comprises a punching punch (8), a stripper plate (9) and a punching female die (10);
the cold forging die comprises a cold forging punch (11), a cold forging end cover (12) which is arranged in an inverted mode and has a U-shaped cross section, and a cold forging base (13); the cold forging end cover (12) is reversely buckled on the cold forging base (13);
the middle part of the bottom of the hot forging lower mold core (6) is provided with a convex part, and the middle part of the upper end of the backing plate (7) is provided with a groove matched with the convex part;
a first channel is formed by a gap between the inner wall of the hot forging lower die sleeve (4) and the outer side wall of the bottom wall of the hot forging lower die insert (5), and a second channel is formed by a gap between the inner side wall of the bottom of the hot forging lower die insert (5) and the outer wall of the upper end of the backing plate (7); the side wall of the bottom wall of the hot forging lower die insert (5) is provided with a plurality of first vent holes, the second channel is communicated with the first channel through the first vent holes, and the side wall of the base plate (7) is provided with second vent holes for communicating the first channel with the external atmosphere;
and the gear blank is sequentially subjected to hot upsetting and upsetting die, hot upsetting and forming die, hot upsetting and punching die and cold forging die and is formed.
2. The tooling die for hot forging and cold forging composite distribution plastic forming according to claim 1, characterized in that:
the height of the axial center line of the second vent hole relative to the bottom end face of the backing plate (7) is larger than the height of the axial center line of the first vent hole relative to the bottom end face of the backing plate (7).
3. The tooling die for hot forging and cold forging composite distribution plastic forming according to claim 2, characterized in that:
the hot forging die sleeve is characterized in that an inner threaded hole is formed in the hot forging die sleeve (4), a connecting hole which is coaxial with the inner threaded hole is formed in the backing plate (7), and the hot forging die sleeve (4) is connected with the backing plate (7) through a bolt.
4. The tooling die for hot forging and cold forging composite distribution plastic forming according to claim 1, characterized in that:
and an annular positioning part for positioning the hot forging lower die insert (5) is arranged on the outer wall of the hot forging lower die sleeve (4).
5. The tooling die for hot forging and cold forging composite distribution plastic forming according to claim 2, characterized in that:
the diameter of the second vent hole is larger than that of the first vent hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936588.XU CN210387405U (en) | 2019-06-19 | 2019-06-19 | Tool die for hot forging and cold forging composite distribution plastic forming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936588.XU CN210387405U (en) | 2019-06-19 | 2019-06-19 | Tool die for hot forging and cold forging composite distribution plastic forming |
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| CN210387405U true CN210387405U (en) | 2020-04-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604642A (en) * | 2020-04-28 | 2020-09-01 | 宝武集团马钢轨交材料科技有限公司 | Preparation method of elastic wheel core |
| CN113634707A (en) * | 2021-06-29 | 2021-11-12 | 中国航空工业标准件制造有限责任公司 | Preparation method of 302-material self-locking nut by hot heading forming |
| CN116174627A (en) * | 2023-03-03 | 2023-05-30 | 哈尔滨工业大学 | Method for preparing disc cake-shaped forging stock with U-shaped notch by semi-closed die forging |
-
2019
- 2019-06-19 CN CN201920936588.XU patent/CN210387405U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604642A (en) * | 2020-04-28 | 2020-09-01 | 宝武集团马钢轨交材料科技有限公司 | Preparation method of elastic wheel core |
| CN111604642B (en) * | 2020-04-28 | 2021-09-24 | 宝武集团马钢轨交材料科技有限公司 | Preparation method of elastic wheel core |
| CN113634707A (en) * | 2021-06-29 | 2021-11-12 | 中国航空工业标准件制造有限责任公司 | Preparation method of 302-material self-locking nut by hot heading forming |
| CN116174627A (en) * | 2023-03-03 | 2023-05-30 | 哈尔滨工业大学 | Method for preparing disc cake-shaped forging stock with U-shaped notch by semi-closed die forging |
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