CN1022222C - Machining method and apparatus of dies for precise fooge of bevel gears - Google Patents
Machining method and apparatus of dies for precise fooge of bevel gears Download PDFInfo
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- CN1022222C CN1022222C CN 90101603 CN90101603A CN1022222C CN 1022222 C CN1022222 C CN 1022222C CN 90101603 CN90101603 CN 90101603 CN 90101603 A CN90101603 A CN 90101603A CN 1022222 C CN1022222 C CN 1022222C
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- bevel gears
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Abstract
The present invention belongs to the die machining field. According to the superplasticity of a die under certain conditions, superplastic extrusion molding is carried out by using a technologic convex die which is especially machined and designed, and chemical heat treatment for the infiltration of needed elements is carried out under a superplastic state. The production period is short and the cost is 50% less than that of electric discharge machining technology. A gear precisely forged by using the die of the present invention can reach grade eight precision and has the smoothness which is higher than 3.2 Ra.
Description
The present invention is a kind of precision die process technology, is mainly used in the processing and manufacturing of bevel gear precision forging die.
The bevel gear precision forging die is the key link that bevel gear realizes not having less machining.Its working portion dimensional tolerance measurement of precision forging die is micron order, and precision and fineness require high, the gear teeth face of forging generally no longer carry out machining, thereby difficulty of processing is big." electric spark " process technology is generally adopted in the processing and manufacturing of existing domestic and international bevel gear precision forging die.This method uses a high-precision electrode once can only process a low precision die cavity, need repeatedly repeat processing, and consumption of electrode is big, the process-cycle is long, and the electrical guiding rule complexity, and shaping rule is subjected to multiple factor affecting again, is difficult for grasping and promoting difficulty.Therefore, up to the present, domestic most of bevel gears still rely on traditional cutting working method production.Machine cutting processing method operation is many, the cycle is long, production efficiency is low, and the metallic fiber streamline is cut off in machining, can cause the dual problem that quality is not high relatively and quantity is difficult to up of bevel gear.
The objective of the invention is in order to solve above-mentioned deficiency, provide a kind of novel application super bevel gear precision forging die manufacture method of moulding process technology.
Realization of the present invention according to mould steel under certain organization condition and deformation condition, have these characteristics of tissue hyper-plastic; for the microscopic structure that makes die blank satisfies super requirement of moulding extruding; at first it is given processing; can adopt Rapid Heating Cyclic to quench or other method; select the surface of graphite mould or glass mould lubricant, coating die blank then for use; play the effect of under specified temp, lubricating and protect mould, the frictional resistance when reducing superplastic deformation.Blank after the coating is put into to surpass and is moulded extrusion forming device, utilizes combined heave die that blank is carried out an extrusion modling under certain temperature and speed.Superplastic formation process of the present invention and super to mould warm area be mould AC
1More than 20 °-60 ℃, super deformation velocity of moulding is the 0.05-30mm/ branch.
The inventive method is the super extrusion modling of moulding, its technology punch is the bevel gear of the special processing design of the present invention, its dimensional accuracy is the key link of producing high-quality precision forging gear, because in the bevel gear forming process, gear is made by mould, and mould is made by the technology punch again, and influence is complicated, conclusion is got up, and its influence has; The influence of expanding with heat and contract with cold that causes by variations in temperature, the heating power influence of organizing variable effect and causing that causes by tissue inter-variable by thermodynamic activity in the work.So the present invention when design technology punch structure size, considers above-mentioned three kinds of influences, calculate according to the following equation:
That is: L=L[1 ± (A+B+C)]
L is a technology punch size, the gear part size of l for processing,
A is a temperature coefficient, and B is a phase change coefficient, and C is a thermodynamic coefficient.
It is short that the present invention has the umbrella tooth mould processing cycle, and operation is simple, cost is low, the life-span is high, fineness is good, an advantage such as small investment.One pair of mould of spark machined needs 16～24 hours, expends 2～3 high-precision electrodes, and the present invention processes a mold and only needs 1～4 hour, and a high accuracy process nut mould can be processed 100～1000 pairs of moulds.Cost only accounts for 1/5 of spark machined.
Describe embodiment in detail below in conjunction with accompanying drawing
Fig. 1 is the bevel gear precision forging die
With processing BJ-130 light-duty vehicle planetary gear precision forging die is example.Mold materials is hot die steel 3Cr
2W
3VA, the flow process of processing method is: the blank blanking one surpass plastics processing-be coated be heated to temperature required in the protection lubricant-heating furnace of packing into and insulation-carry out superplastic formation according to certain strain rate.Super plastics processing after the blank blanking is at Ac
1More than 30～50 ℃ of circulating quenchings 3 times.The technology punch adopts the nickel-base alloy manufacturing, and its physical dimension design is according to L=I(1 ± △) formula calculates:
L is a technology punch size, and l is the product size, and shaped device places on the press bench, and die is put into heating furnace.The dies for precise fooge of bevel gears blank (9) that coats lubricant is placed in the heating furnace, is heated to 790～810 ℃ and be incubated 30～60 minutes.The starting pressure machine, the speed isothermal extrusion blank that the technology punch is divided with 0.05～3mm/.Until molding the bevel gear precision forging die.Be incubated about 1 hour super moulding under the temperature.With push rod mould is ejected at last.
Adopt processed mould of the present invention, its precision can reach the 6-7 level, and fineness is
6～
7.The gear that goes out with this mould finish forge can reach 8 class precisions, and fineness is more than 5.
Claims (1)
1, a kind of method of machining bevel gears finish forge mould, after die blank surpassed plastics processing, surface coated lubricant, in extrusion molding apparatus, surpass and mould the isothermal extrusion modling, it is characterized in that: lubricant adopts graphite mould or glass mould, super moulding in the isothermal extrusion process, super to mould warm area Ti be mould Ac
1More than 20～60 ℃, super deformation velocity of moulding is the 0.05-3mm/ branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101603 CN1022222C (en) | 1990-03-26 | 1990-03-26 | Machining method and apparatus of dies for precise fooge of bevel gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101603 CN1022222C (en) | 1990-03-26 | 1990-03-26 | Machining method and apparatus of dies for precise fooge of bevel gears |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055132A CN1055132A (en) | 1991-10-09 |
| CN1022222C true CN1022222C (en) | 1993-09-29 |
Family
ID=4877144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101603 Expired - Fee Related CN1022222C (en) | 1990-03-26 | 1990-03-26 | Machining method and apparatus of dies for precise fooge of bevel gears |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022222C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418696C (en) * | 2005-02-16 | 2008-09-17 | 江苏森威集团有限责任公司 | Shunting forging process for automobile reverse gear |
| CN101229614B (en) * | 2008-02-26 | 2010-06-16 | 江苏飞船股份有限公司 | Method of manufacturing straight-tooth bevel gear finish forge mould |
| CN101767119A (en) * | 2008-12-31 | 2010-07-07 | 江苏汤臣汽车零部件有限公司 | Method and equipment for processing worm of auto automatic adjusting arm |
| JP5640814B2 (en) * | 2011-02-24 | 2014-12-17 | アイシン・エィ・ダブリュ株式会社 | Tooth profile part manufacturing method and tooth profile part manufacturing apparatus |
| CN102896167A (en) * | 2012-08-30 | 2013-01-30 | 镇江中虎弹簧有限公司 | Worm bevel gear cold forging manufacturing process |
| CN105268802A (en) * | 2014-07-19 | 2016-01-27 | 杨林 | Board superplastic forming machine |
| CN104226710A (en) * | 2014-09-25 | 2014-12-24 | 昆山伯建精密模具有限公司 | Hot extrusion forming die |
| CN105689612A (en) * | 2016-03-12 | 2016-06-22 | 洛阳华冠齿轮股份有限公司 | Near-net forming forging method for novel straight-tooth bevel gear tooth-profile die |
| CN106391983B (en) * | 2016-11-02 | 2018-12-11 | 贵州航飞精密制造有限公司 | It is a kind of precisely to fast implement the molding processing method of tooth and mold |
| CN106624680A (en) * | 2017-01-21 | 2017-05-10 | 杭州科技职业技术学院 | Machining method for forging die of automobile bearing |
| CN116532508B (en) * | 2023-03-17 | 2024-05-17 | 山东普瑞而机械制造有限公司 | Gear or gear ring high-temperature extrusion finish machining manufacturing method |
-
1990
- 1990-03-26 CN CN 90101603 patent/CN1022222C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055132A (en) | 1991-10-09 |
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