CN103028689B - A kind of mould and die forging method thereof improving the coredforging mould life-span - Google Patents
A kind of mould and die forging method thereof improving the coredforging mould life-span Download PDFInfo
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- CN103028689B CN103028689B CN201210494153.7A CN201210494153A CN103028689B CN 103028689 B CN103028689 B CN 103028689B CN 201210494153 A CN201210494153 A CN 201210494153A CN 103028689 B CN103028689 B CN 103028689B
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Abstract
The invention discloses a kind of mould and the die forging method thereof that improve the coredforging mould life-span, described mould comprises upper die and lower die and side direction punch, it is characterized in that, described side direction punch comprises the small punch being positioned at front end and the die holder matrix being positioned at rear end, described small punch front end be used for feature contacts and extruded go out parts locally shape, described die holder matrix rear end is for being fixed on die holder or power-equipment, and described small punch rear end and contact position, die holder matrix front end are that plane is docked or adopts the concavo-convex butt coupling that can prevent from rotating.Described die forging method adopts above-mentioned mould, and changes to guarantee that its temperature is lower than 200 DEG C to small punch when die forging.The present invention can improve the life-span of multi-ram forging punch and reduce the wearing and tearing of mould, and convenient mounting and clamping, part quality are improved significantly, and production cost greatly reduces, and production efficiency improves greatly, achieves the production in enormous quantities of part multi-ram forging technique.
Description
Technical field
The present invention relates to the coredforging mould field in metal plastic forming, especially relate to a kind of mould and the die forging method thereof that improve the coredforging mould life-span.
Background technology
Multi-ram forging be a kind of utilization can divide mould forge under the effect of one stroke of press complex-shaped, without burr, without the squeezing of draft angle or little draft angle forging, forge the composite technology combined.Common coredforging mould, its structure generally comprises patrix, and counterdie and side direction punch, form part die cavity after three's matched moulds.
Because multi-ram forging part forming carries out in the near closed hollow ring with multiple die joint, therefore multi-ram forging is that a kind of Product Precision is high, and the die forging new technology that stock utilization is high and production efficiency is high, in recent years, more and more becomes the focus of research.The raw grade of such as Ji Dong has carried out sunykatuib analysis and experimental study (Central China University of Science and Technology's journal (natural science and technology version), 2009,37(6) to joint body multi-ram forging technique respectively).The multi-ram forging to joint body such as cycle is extruded has carried out technical study (Master's thesis, Northcentral University 2008).The technique that Xue Kemin etc. dock body multi-ram forging extrusion molding carried out numerical simulation study (
arms Material scientific and engineering, 2009,32(3)).Zhou Zhiming etc. are studied (patent No. ZL201010566154.9) the multi-ram forging technique of 40Cr steel body seat class part and mould.
Although the research of above multi-ram forging and technique achieve many achievements, but due to the multi-ram forging extruded time long, heat parts temperature is high, often can reach 1100 ° of about C, part and punch long for time of contact, generally can reach about 20S, and it is large to bear pressure, punch is elevated to rapidly 600-800 ° of C in work tens later temperature, and the mechanical properties such as the intensity of punch and hardness sharply decline.Because side direction punch is generally used for the local shape molding part, therefore side direction punch is generally comparatively elongated planform.Like this, under the effect of extruding force, be easy to wearing and tearing or distortion, form large fillet and fold, part overlap is excessive, forms fold, of poor quality; In the side direction punch life-span extremely low (general tens), production cost is high, and efficiency is low, can not form mass production capabilities.Therefore design one and can make good, wear-resistant, repair and replacement mould and the production operation method easily of side direction punch heat radiation, to reduce side direction plug temperature, reduce distortion, to improve the mold use life-span, to reduce production cost, to reach mass production capabilities, become the technical problem that those skilled in the art are badly in need of solving.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: how to provide a kind of mould and the die forging method that improve the coredforging mould life-span, to improve the life-span of the accurate hot-extrusion mold of multi-ram forging, reduce production cost, enhance productivity, realize the batch application of accurate hot extrusion technique.
In order to solve the problems of the technologies described above, in the present invention, have employed following technical scheme:
A kind of mould improving the coredforging mould life-span, comprise upper die and lower die and side direction punch, it is characterized in that, described side direction punch comprises the small punch being positioned at front end and the die holder matrix being positioned at rear end, described small punch front end be used for feature contacts and extruded go out parts locally shape, described die holder matrix rear end is for being fixed on die holder or power-equipment, and described small punch rear end and contact position, die holder matrix front end are that plane is docked or adopts the concavo-convex butt coupling that can prevent from rotating.
In this programme, when small punch rear end and contact position, die holder matrix front end be plane dock structure time, it can be made to manufacture very convenient.When both adopt the version of concavo-convex butt coupling, can prevent small punch from use rotating, guarantee that its die forging precision is higher.This programme structure is simple, and it is convenient to implement, and the small punch arranged separately is hold flimsy position most in side direction punch, therefore can change separately or keep in repair after damaging, and reduces costs, also can operationally lower the temperature separately to small punch, life-extending.
As optimization, described small punch length is 20-50cm, and this size can guarantee that small punch self possesses enough intensity, hardness and holds heat energy power when working.
The invention also discloses a kind of die forging method improving the coredforging mould life-span, its feature is, have employed above-mentioned mould and carry out die forging, small punch is taken out after a die forging working cycles during die forging, by small punch cooling or after being replaced by previously prepared good other same shape small punches for subsequent use, install again and carry out next die forging working cycles, guarantee that small punch temperature that die forging uses is lower than 200 DEG C.Wherein, a die forging working cycles refers to that processing obtains the course of work of a part.
In this method; after a working cycles, small punch can take out easily and install; can cool fast or change after taking-up; reinstall rear temperature to reduce; small punch temperature is lower than 200 DEG C; self can not Yin Gaowen and wearing and tearing, also play the heat trnasfer between isolation workpiece and punch pedestal and effect simultaneously, effectively can reduce the wearing and tearing of punch.Wherein, manufacture multiple small punch and recycle, fluency and the agility of whole technique can be ensured especially.Small punch has isolated the heat trnasfer between workpiece and solid punch, and solid punch can the temperature remains within the normal range, can not wear and tear and be out of shape in work.
In sum, adopt the mould in raising coredforging mould life-span of the present invention, the cost of manufacture that can reduce the temperature in punch work, ensure punch hardness, reduce the wearing and tearing of punch, improve the life-span of punch, reduce punch, improves product percent of pass, enhances productivity, reduces production cost.Use through actual production, small punch temperature Absorbable organic halogens is at 200 ° of about C, hardness does not reduce, originally the punch life-span is 150-200, and present small punch just can reach 1000, and part overlap is reduced to 5mm by about 20mm, fillet will be R2 by R5, completely eliminate part end face to fold, greatly reduce production cost, achieve the accurate hot extrusion batch production of multi-ram forging of special steel part.
Accompanying drawing explanation
Fig. 1 is the structural representation of mould of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
During concrete enforcement, see Fig. 1, a kind of mould improving the coredforging mould life-span, comprise patrix 1, counterdie 2 and side direction punch, wherein, described side direction punch comprises the small punch 3 being positioned at front end and the die holder matrix 4 being positioned at rear end, described small punch 3 front end be used for contacting with part 5 and extruded go out parts locally shape, described die holder matrix 4 rear end is used for being fixed on die holder or power-equipment 6, and described small punch 3 rear end and contact position, die holder matrix 4 front end are that plane is docked or adopts the concavo-convex butt coupling that can prevent from rotating.Described small punch 3 length is 20-50cm.
When this mould is specifically implemented, small punch adopts H13 to be raw material, heat treatment hardness 45-50HRC, part requirements manufacture is pressed with feature contacts one end small punch size, be plane with die holder substrate contact one end or prevent from small punch from rotating being made into anti-rotation step, and guarantee the extruding force of bearing needed for forming parts.The each cross dimensions of small punch is consistent, and convenient Linear cut or the bar of adopting directly is processed, and can move forward and backward smoothly in die and take out.Die holder matrix 4 adopts 5CrMnMo to be raw material, and heat treatment hardness 45-50HRC adopts plane be connected or be of coupled connections with small punch link, and facilitates small punch to take out and uniform force, and the other end takes step to be connected with die holder or power-equipment.Namely side direction punch is made as two sections, and small punch ensures part shape and can take out smoothly, and die holder matrix ensures to transmit extruding force.
Die forging method of the present invention in use, namely the mould of said structure is adopted to carry out die forging, small punch is taken out after a die forging working cycles during die forging, by small punch cooling or after being replaced by previously prepared good other same shape small punches for subsequent use, install again and carry out next die forging working cycles, guarantee that small punch temperature that die forging uses is lower than 200 DEG C.
When die forging, workpiece (950-1180 ° of C) under the state of heat is easy to transfer heat to small punch, and small punch temperature raises, but is taken out in the lump by small punch when taking out part, reuse after immersion cooling is carried out to small punch, ensure that small punch temperature is at 200 ° of C and following.Certainly can make multiple small punch to recycle.Like this, small punch has isolated the heat trnasfer between workpiece and solid punch, and the temperature remains within the normal range for punch physical efficiency, can not wear and tear and be out of shape in work.
Specifically, the present invention has following advantage: 1) small punch has isolated the heat trnasfer of part and die holder matrix, and die holder substrate temperature is lower, does not reach annealing temperature, well can ensure hardness, bear extruding force; 2) small punch having extruded rear smooth taking-up, can be lowered the temperature in time, ensures that small punch temperature is lower than annealing temperature, ensures that the hardness of small punch does not reduce, improve the wearability of small punch, improves the punch life-span and ensures that part quality is stablized.3) small punch participates in forming parts, can use better raw material, but size is little, takes Linear cut and common machine to add making; Body of punch only participates in power transmission, uses general material.Such punch material consumption is few, and cost of manufacture is low.
Use a kind of mould and method improving the coredforging mould life-span of the present invention, small punch can remain the temperature of 200 ° of about C aborning, hardness does not decline, wear extent reduces, and the life-span can reach more than 1000, and the body of punch substantially indeformable life-span significantly increases, part corrugationless, overlap are very thin and highly only have 3mm, the consumption of mould significantly reduces, and class's output reaches 600, achieves the accurate hot extrusion batch production of multi-ram forging of steel components.
Claims (2)
1. one kind is improved the die forging method in coredforging mould life-span, it is characterized in that, have employed a kind of mould and carry out die forging, described mould comprises upper die and lower die and side direction punch, described side direction punch comprises the small punch being positioned at front end and the die holder matrix being positioned at rear end, described small punch front end be used for feature contacts and extruded go out parts locally shape, described die holder matrix rear end is for being fixed on die holder or power-equipment, and described small punch rear end and contact position, die holder matrix front end are that plane is docked or adopts the concavo-convex butt coupling that can prevent from rotating; Small punch adopts H13 to be raw material, heat treatment hardness 45-50HRC, part requirements manufacture is pressed with feature contacts one end small punch size, the each cross dimensions of small punch is consistent, adopt linear cutter, and can move forward and backward smoothly in die and take out, die holder matrix adopts 5CrMnMo to be raw material, heat treatment hardness 45-50HRC;
Take out small punch after a die forging working cycles during die forging, by small punch cooling or after being replaced by previously prepared good other same shape small punches for subsequent use, then install and carry out next die forging working cycles, guarantee that small punch temperature that die forging uses is lower than 200 DEG C.
2. the die forging method improving the coredforging mould life-span as claimed in claim 1, it is characterized in that, described small punch length is 20-50cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494153.7A CN103028689B (en) | 2012-11-28 | 2012-11-28 | A kind of mould and die forging method thereof improving the coredforging mould life-span |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494153.7A CN103028689B (en) | 2012-11-28 | 2012-11-28 | A kind of mould and die forging method thereof improving the coredforging mould life-span |
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| Publication Number | Publication Date |
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| CN103028689A CN103028689A (en) | 2013-04-10 |
| CN103028689B true CN103028689B (en) | 2015-12-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103949571B (en) * | 2014-03-31 | 2016-03-30 | 太仓市高泰机械有限公司 | A kind of rotary multiple spot machining gears forging die device |
| CN113333654B (en) * | 2021-07-20 | 2023-01-24 | 中车戚墅堰机车车辆工艺研究所有限公司 | Die forging device and die forging method for rod piece with branches |
Citations (6)
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| CN2619740Y (en) * | 2003-02-10 | 2004-06-09 | 杨俊彬 | Three-shaft bidirectional double-action shaping double-acting forging module |
| CN101053888A (en) * | 2007-02-16 | 2007-10-17 | 李之海 | Multidirection press die |
| CN201316782Y (en) * | 2008-07-15 | 2009-09-30 | 中国航空工业标准件制造有限责任公司 | Hot heading separate-part combined-type hard alloy die |
| CN102029348A (en) * | 2010-11-30 | 2011-04-27 | 重庆理工大学 | Multi-way die forging process method and mould for 40Cr steel case type parts |
| CN102049456A (en) * | 2010-11-30 | 2011-05-11 | 重庆理工大学 | Multi-ram die forging process method and die for 40Cr-steel frame type parts |
| CN202137314U (en) * | 2011-06-23 | 2012-02-08 | 盐城博越管件有限公司 | Beveling type automatic die separating and combining frame |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003266137A (en) * | 2002-03-12 | 2003-09-24 | Toto Ltd | Forging device, and forging method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2619740Y (en) * | 2003-02-10 | 2004-06-09 | 杨俊彬 | Three-shaft bidirectional double-action shaping double-acting forging module |
| CN101053888A (en) * | 2007-02-16 | 2007-10-17 | 李之海 | Multidirection press die |
| CN201316782Y (en) * | 2008-07-15 | 2009-09-30 | 中国航空工业标准件制造有限责任公司 | Hot heading separate-part combined-type hard alloy die |
| CN102029348A (en) * | 2010-11-30 | 2011-04-27 | 重庆理工大学 | Multi-way die forging process method and mould for 40Cr steel case type parts |
| CN102049456A (en) * | 2010-11-30 | 2011-05-11 | 重庆理工大学 | Multi-ram die forging process method and die for 40Cr-steel frame type parts |
| CN202137314U (en) * | 2011-06-23 | 2012-02-08 | 盐城博越管件有限公司 | Beveling type automatic die separating and combining frame |
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