CN104439027B - Transmission shaft fork axle new technique for forging - Google Patents

Transmission shaft fork axle new technique for forging Download PDF

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Publication number
CN104439027B
CN104439027B CN201410615127.4A CN201410615127A CN104439027B CN 104439027 B CN104439027 B CN 104439027B CN 201410615127 A CN201410615127 A CN 201410615127A CN 104439027 B CN104439027 B CN 104439027B
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CN
China
Prior art keywords
forging
head
blank
hole
eventually
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CN201410615127.4A
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Chinese (zh)
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CN104439027A (en
Inventor
孟会涛
刘其勇
胡卫华
郭艳珺
张恒
丁圣杰
安伟浩
陈喜乐
赵世启
宋航
Original Assignee
许昌中兴锻造有限公司
许昌远东传动轴股份有限公司
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Priority to CN201410615127.4A priority Critical patent/CN104439027B/en
Publication of CN104439027A publication Critical patent/CN104439027A/en
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Publication of CN104439027B publication Critical patent/CN104439027B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor

Abstract

Transmission shaft fork axle new technique for forging, comprises the following steps: (1), blanking; (2), local Frequency Induction Heating; (3), base: in the middle of the blanking mold be put on pressure machine by the blank after heating, the hot junction that adds of blank is forged and pressed by manipulation pressure machine, takes out after head forging forming, and head is flattened in track and field run-track shaped by manipulation pressure machine; (4), forging eventually: forge and press in the middle of finish-forging die blank being placed on whole forging force machine, become whole forging after forging and stamping; (5), trimming: the middle gross weight of whole forging or overlap part are cut away and becomes forging products. The present invention avoids the stress between blank bar portion and mould to concentrate, save Preform Die Master Cost, Mould Machining expense, to shorten die production cycle, machining process redundancy little, also improves production efficiency, reduces the labour intensity of workman, reduces production cost.

Description

Transmission shaft fork axle new technique for forging

Technical field

The invention belongs to vehicle transmission forging shaft production technical field, it is specifically related to a kind of transmission shaft fork axle new technique for forging.

Background technology

At present, the joint fork forging shaft process redundancy that conventional forging process is produced is big, energy consumption height, production efficiency are low, and the conventional forging process of joint fork axle is: blanking �� entirety Frequency Induction Heating �� base �� pre-forging �� whole forging �� trimming. Die forging gradient >=2 �� of blank after overall heating when forging, cause process redundancy during machining big, and the energy consumption height of overall heating, the forging technology design traditional due to joint fork axle has pre-forging, the increase of pre-forging process, not only add moulding stock expense, Mould Machining expense, also add the die production cycle, in die production one, only just significantly improve production cost, the increase of this work step reduces labor productivity in addition, increase man hour of labour, also virtually add work production cost. Not only add production cost in conventional forging process and also reduce production efficiency.

In a word, the defect of conventional forging process is:

1, production efficiency is low;

2, overall heating in medium frequency energy consumption height;

3, forging process surplus is big;

4, the die cost height of average every forging.

Summary of the invention

The present invention is in order to solve weak point of the prior art, it is provided that the transmission shaft fork axle new technique for forging that a kind of production efficiency height, energy consumption are little, metalworking surplus is little, production cost is low.

For solving the problems of the technologies described above, the present invention adopts following technical scheme: transmission shaft fork axle new technique for forging, comprises the following steps,

(1), blanking: adopt full-automatic numerical control sawing machine or numerical control guillotine cutter to be the blank of specified dimension by round steel blanking;

(2), local Frequency Induction Heating: 1/3rd of each charge length are carried out Frequency Induction Heating, and heating and temperature control is between 1100 �㡫1150 DEG C, and measurement and control of temperature adopts infrared thermometer;

(3), base: in the middle of the blanking mold be put on pressure machine by the blank after heating, the hot junction that adds of blank is forged and pressed by manipulation pressure machine, takes out after head forging forming, and head is flattened in track and field run-track shaped by manipulation pressure machine;

(4), forging eventually: forge and press in the middle of finish-forging die blank being placed on whole forging force machine, become whole forging after forging and stamping;

(5), trimming: forging flash part at end is cut away and becomes forging products;

Described blanking mold comprises base patrix and base counterdie, base counterdie internal vertical is provided with the first through hole for placing blank, first through hole comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of the conical section of the first through hole, the bus of the conical section of the first through hole and the angle of medullary ray are 0.5 ��, the lower end of the conical section of the first through hole is equal with the internal diameter of cylindrical section, the base push rod with this cylindrical section running fit it is provided with in the cylindrical section of the first through hole, the joint of base counterdie upper surface and the first through hole upper end is provided with the first up big and down small tapering transition hole, base patrix lower surface is provided with the round groove corresponding up and down with the first tapering transition hole, circle groove and the first tapering transition hole are encircled into blank head forging and stamping chamber, upper groove has been offered in base patrix lower surface side, base counterdie upper surface side is provided with the low groove being positioned at immediately below upper groove, upper groove and low groove are encircled into the forging and stamping space for flattening blank head, when base patrix contacts up and down with base counterdie, the height in forging and stamping space is less than the diameter of round groove,

Described finish-forging die comprises forging patrix eventually and forges counterdie with whole, forging counterdie internal vertical is provided with the 2nd through hole for placing blank eventually, 2nd through hole comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of conical section of the 2nd through hole, the bus of the conical section of the 2nd through hole and the angle of medullary ray are 0.5 ��, the lower end of conical section of the 2nd through hole is equal with the internal diameter of cylindrical section, it is provided with in the cylindrical section of the 2nd through hole and forges push rod the end with this cylindrical section running fit, the joint of forging counterdie upper surface and the 2nd through hole upper end is provided with the 2nd up big and down small taper transitional pore eventually, the annulus groove that forging patrix lower surface is provided with pressure head and is positioned at around pressure head eventually, pressure head and annulus groove and the 2nd taper transitional pore up and down the corresponding head that is encircled into forge chamber eventually, between forging patrix and whole forging counterdie, correspondence is provided with overlap gap and the material overflow cavity of annular eventually, material overflow cavity is connected in forging chamber with head eventually by overlap gap, the corner of forging counterdie upper surface is provided with the locating notch of rectangle eventually, and forging patrix lower surface outer edge is provided with the positioning boss that can coordinate up and down with locating notch eventually.

Described step (3) is specially: cylinder blank is put in the first through hole, blank upper end is heating part, the lower end of blank and base push rod upper-end contact, manipulation pressure machine, base patrix is moved down, circle groove bottom downward pressed compact material upper end, head is forged and pressed chamber and is full of the head forming collar plate shape by blank deformation, base push rod is moved up by the hydraulic pressure or the mechanical type liftout attachment that then manipulate pressure machine, blank is ejected by base push rod, then the bar portion of blank is clamped with clamp, bar portion keeps level, head is placed on lower groove floor surfaces, manipulation pressure machine, base patrix is moved down, upper groove lower surface forging and stamping head, so just head is flattened in track and field run-track shaped.

Described step (4) is specially: be inserted in the 2nd through hole by the bar portion of blank, the length direction that the length direction of blank head and head forge chamber eventually is consistent, the whole forging force machine of manipulation, forging patrix eventually is moved down, pressure head forges and presses blank head center downwards, by material unnecessary for head to around expanding, until head is full of in forging chamber eventually, and unnecessary material enters in material overflow cavity by overlap gap, stop forging and stamping operation, forging push rod eventually is moved up by the hydraulic pressure of the whole forging force machine of manipulation or mechanical type liftout attachment, forging at end is ejected by forging push rod eventually, forging operation completes eventually.

Adopt technique scheme, due to the bar portion head of joint fork forging shaft, so traditional overall Frequency Induction Heating being made into local Frequency Induction Heating, forging position (distortion position) is not needed not heat, select and during former material blanking, make former material diameter close to forging bar portion diameter, cylindrical only needs to stay 1 ~ 1.5mm process redundancy, due to the bar end surface marginal existence point angle of local heating forging, at this moment mold cavity bottom surface is needed also must to be made into point angle, mould has the problem that there is stress during sharp angle and concentrate, stress concentrates mould easy to crack, so point angle should be avoided when designing mould, first through hole and the 2nd through hole are all designed to structure penetrating up and down by the present invention, and the base push rod equal with forging lower surface external diameter is set at the cylindrical section of the first through hole, cylindrical section at the 2nd through hole is arranged forges push rod the end equal with forging lower surface external diameter, due to bar subordinate's end face not temperature distortion, even if bar subordinate's end face edge has sharp angle, also the problem that stress is concentrated can not be produced.

The present invention is in forging process: remove existing pre-forger step, blanker walks and needs improvement to meet eventually to forge once shaped, blanker's step makes first heading into, then mode head flattened, so not only save Preform Die Master Cost, Mould Machining expense, shorten the die production cycle, also improve production efficiency, reduce the labour intensity of workman, reduce production cost.

Entirety Frequency Induction Heating is made into local Frequency Induction Heating by the present invention compared with traditional technology, reduces energy consumption, in addition die forging gradient��0.5 �� when forging of blank after local heating, and machining process redundancy is little.

Accompanying drawing explanation

Fig. 1 is the structural representation of blanking mold in the present invention;

Fig. 2 is the structural representation of finish-forging die in the present invention;

Fig. 3 is the vertical view of forging counterdie eventually in Fig. 2.

Embodiment

The transmission shaft fork axle new technique for forging of the present invention, comprises the following steps:

(1), blanking: adopt full-automatic numerical control sawing machine or numerical control guillotine cutter to be the blank of specified dimension by round steel blanking;

(2), local Frequency Induction Heating: 1/3rd of each charge length are carried out Frequency Induction Heating, and heating and temperature control is between 1100 �㡫1150 DEG C, and measurement and control of temperature adopts infrared thermometer;

(3), base: in the middle of the blanking mold be put on pressure machine by the blank after heating, the hot junction that adds of blank is forged and pressed by manipulation pressure machine, takes out after head forging forming, and head is flattened in track and field run-track shaped by manipulation pressure machine;

(4), forging eventually: forge and press in the middle of finish-forging die blank being placed on whole forging force machine, become whole forging after forging and stamping;

(5), trimming: the middle gross weight of whole forging or overlap part are cut away and becomes forging products;

As shown in Figure 1, blanking mold comprises base patrix 1 and base counterdie 2, base counterdie 2 internal vertical is provided with the first through hole 3 for placing blank, first through hole 3 comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of conical section of the first through hole 3, the bus of the conical section of the first through hole 3 and the included angle A of medullary ray are 0.5 ��, the lower end of conical section of the first through hole 3 is equal with the internal diameter of cylindrical section, the base push rod 4 with this cylindrical section running fit it is provided with in the cylindrical section of the first through hole 3, the joint of base counterdie 2 upper surface and the first through hole 3 upper end is provided with the first up big and down small tapering transition hole 5, base patrix 1 lower surface is provided with the round groove 6 corresponding with the first tapering transition hole about 5, circle groove 6 and the first tapering transition hole 5 are encircled into blank head forging and stamping chamber, upper groove 7 has been offered in base patrix 1 lower surface side, base counterdie 2 upper surface side is provided with the low groove 8 being positioned at immediately below upper groove 7, upper groove 7 and low groove 8 are encircled into the forging and stamping space for flattening blank head, when base patrix 1 contacts with base counterdie about 2, the height in forging and stamping space is less than the diameter of round groove 6.

As shown in Figures 2 and 3, finish-forging die comprises forging patrix 11 and eventually forging counterdie 12 eventually, forging counterdie 12 internal vertical is provided with the 2nd through hole 13 for placing blank eventually, 2nd through hole 13 comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of conical section of the 2nd through hole 13, the bus of the conical section of the 2nd through hole 13 and the included angle B of medullary ray are 0.5 ��, the lower end of conical section of the 2nd through hole 13 is equal with the internal diameter of cylindrical section, it is provided with in the cylindrical section of the 2nd through hole 13 and forges push rod 14 end with this cylindrical section running fit, the joint of forging counterdie 12 upper surface and the 2nd through hole 13 upper end is provided with the 2nd up big and down small taper transitional pore 15 eventually, the annulus groove 17 that forging patrix 11 lower surface is provided with pressure head 16 and is positioned at around pressure head 16 eventually, pressure head 16 and annulus groove 17 be encircled into head corresponding to the 2nd taper transitional pore about 15 forge chamber eventually, between forging patrix 11 and whole forging counterdie 12, correspondence is provided with overlap gap and the material overflow cavity 18 of annular eventually, material overflow cavity 18 is connected in forging chamber with head eventually by overlap gap 19, the corner of forging counterdie 12 upper surface is provided with the locating notch 20 of rectangle eventually, and forging patrix 11 lower surface outer edge is provided with the positioning boss 21 that can coordinate with locating notch about 20 eventually.

The step (3) of the present invention is specially: cylinder blank is put in the first through hole 3, blank upper end is heating part, the lower end of blank and base push rod 4 upper-end contact, manipulation pressure machine, base patrix 1 is moved down, circle downward pressed compact material upper end, groove 6 bottom surface, head is forged and pressed chamber and is full of the head forming collar plate shape by blank deformation, base push rod 4 is moved up by the hydraulic pressure or the mechanical type liftout attachment that then manipulate pressure machine, blank is ejected by base push rod 4, then the bar portion of blank is clamped with clamp, bar portion keeps level, head is placed on low groove 8 bottom surface, manipulation pressure machine, base patrix 1 is moved down, upper groove 7 lower surface forging and stamping head, so just head is flattened in track and field run-track shaped.

The step (4) of the present invention is specially: be inserted in the 2nd through hole 13 by the bar portion of blank, the length direction that the length direction of blank head and head forge chamber eventually is consistent, the whole forging force machine of manipulation, forging patrix 11 eventually is moved down, pressure head 16 forges and presses blank head center downwards, by material unnecessary for head to around expanding, until head is full of in forging chamber eventually, and unnecessary material enters in material overflow cavity 18 by overlap gap 19, stop forging and stamping operation, forging push rod 14 eventually is moved up by the hydraulic pressure of the whole forging force machine of manipulation or mechanical type liftout attachment, forging at end is ejected by forging push rod 14 eventually, forging operation completes eventually.

Due to the bar portion head of joint fork forging shaft, so traditional overall Frequency Induction Heating being made into local Frequency Induction Heating, forging position (distortion position) is not needed not heat, select and during former material blanking, make former material diameter close to forging bar portion diameter, cylindrical only needs to stay 1 ~ 1.5mm process redundancy, due to the bar end surface marginal existence point angle of local heating forging, at this moment mold cavity bottom surface is needed also must to be made into point angle, mould has the problem that there is stress during sharp angle and concentrate, stress concentrates mould easy to crack, so point angle should be avoided when designing mould, first through hole 3 and the 2nd through hole 13 are all designed to structure penetrating up and down by the present invention, and the base push rod 4 equal with forging lower surface external diameter is set at the cylindrical section of the first through hole 3, cylindrical section at the 2nd through hole 13 is arranged forges push rod 14 end equal with forging lower surface external diameter, due to bar subordinate's end face not temperature distortion, even if bar subordinate's end face edge has sharp angle, also the problem that stress is concentrated can not be produced.

The present invention is in forging process: remove existing pre-forger step, blanker walks and needs improvement to meet eventually to forge once shaped, blanker's step makes first heading into, then mode head flattened, so not only save Preform Die Master Cost, Mould Machining expense, shorten the die production cycle, also improve production efficiency, reduce the labour intensity of workman, reduce production cost.

Entirety Frequency Induction Heating is made into local Frequency Induction Heating by the present invention compared with traditional technology, reduces energy consumption, in addition die forging gradient��0.5 �� when forging of blank after local heating, and machining process redundancy is little.

The technical scheme of above embodiment only unrestricted the present invention in order to explanation, although with reference to above-described embodiment to invention has been detailed explanation, it will be understood by those within the art that: still the present invention can be modified or equivalent replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the right of the present invention.

Claims (3)

1. transmission shaft fork axle new technique for forging, it is characterised in that: comprise the following steps,
(1), blanking: adopt full-automatic numerical control sawing machine or numerical control guillotine cutter to be the blank of specified dimension by round steel blanking;
(2), local Frequency Induction Heating: 1/3rd of each charge length are carried out Frequency Induction Heating, and heating and temperature control is between 1100 �㡫1150 DEG C, and measurement and control of temperature adopts infrared thermometer;
(3), base: in the middle of the blanking mold be put on pressure machine by the blank after heating, the hot junction that adds of blank is forged and pressed by manipulation pressure machine, takes out after head forging forming, and head is flattened in track and field run-track shaped by manipulation pressure machine;
(4), forging eventually: forge and press in the middle of finish-forging die blank being placed on whole forging force machine, become whole forging after forging and stamping;
(5), trimming: the overlap part of whole forging is cut away and becomes forging products;
Described blanking mold comprises base patrix and base counterdie, base counterdie internal vertical is provided with the first through hole for placing blank, first through hole comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of the conical section of the first through hole, the bus of the conical section of the first through hole and the angle of medullary ray are 0.5 ��, the lower end of the conical section of the first through hole is equal with the internal diameter of cylindrical section, the base push rod with this cylindrical section running fit it is provided with in the cylindrical section of the first through hole, the joint of base counterdie upper surface and the first through hole upper end is provided with the first up big and down small tapering transition hole, base patrix lower surface is provided with the round groove corresponding up and down with the first tapering transition hole, circle groove and the first tapering transition hole are encircled into blank head forging and stamping chamber, upper groove has been offered in base patrix lower surface side, base counterdie upper surface side is provided with the low groove being positioned at immediately below upper groove, upper groove and low groove are encircled into the forging and stamping space for flattening blank head, when base patrix contacts up and down with base counterdie, the height in forging and stamping space is less than the diameter of round groove,
Described finish-forging die comprises forging patrix eventually and forges counterdie with whole, forging counterdie internal vertical is provided with the 2nd through hole for placing blank eventually, 2nd through hole comprises the conical section on top and the cylindrical section of bottom, the big up and small down structure of conical section of the 2nd through hole, the bus of the conical section of the 2nd through hole and the angle of medullary ray are 0.5 ��, the lower end of conical section of the 2nd through hole is equal with the internal diameter of cylindrical section, it is provided with in the cylindrical section of the 2nd through hole and forges push rod the end with this cylindrical section running fit, the joint of forging counterdie upper surface and the 2nd through hole upper end is provided with the 2nd up big and down small taper transitional pore eventually, the annulus groove that forging patrix lower surface is provided with pressure head and is positioned at around pressure head eventually, pressure head and annulus groove and the 2nd taper transitional pore up and down the corresponding head that is encircled into forge chamber eventually, between forging patrix and whole forging counterdie, correspondence is provided with overlap gap and the material overflow cavity of annular eventually, material overflow cavity is connected in forging chamber with head eventually by overlap gap, the corner of forging counterdie upper surface is provided with the locating notch of rectangle eventually, and forging patrix lower surface outer edge is provided with the positioning boss that can coordinate up and down with locating notch eventually.
2. transmission shaft fork axle new technique for forging according to claim 1, it is characterized in that: described step (3) is specially: cylinder blank is put in the first through hole, blank upper end is heating part, the lower end of blank and base push rod upper-end contact, manipulation pressure machine, base patrix is moved down, circle groove bottom downward pressed compact material upper end, head is forged and pressed chamber and is full of the head forming collar plate shape by blank deformation, base push rod is moved up by the hydraulic pressure or the mechanical type liftout attachment that then manipulate pressure machine, blank is ejected by base push rod, then the bar portion of blank is clamped with clamp, bar portion keeps level, head is placed on lower groove floor surfaces, manipulation pressure machine, base patrix is moved down, upper groove lower surface forging and stamping head, so just head is flattened in track and field run-track shaped.
3. transmission shaft fork axle new technique for forging according to claim 1 and 2, it is characterized in that: described step (4) is specially: the bar portion of blank is inserted in the 2nd through hole, the length direction that the length direction of blank head and head forge chamber eventually is consistent, the whole forging force machine of manipulation, forging patrix eventually is moved down, pressure head forges and presses blank head center downwards, by material unnecessary for head to around expanding, until head is full of in forging chamber eventually, and unnecessary material enters in material overflow cavity by overlap gap, stop forging and stamping operation, forging push rod eventually is moved up by the hydraulic pressure of the whole forging force machine of manipulation or mechanical type liftout attachment, forging at end is ejected by forging push rod eventually, forging operation completes eventually.
CN201410615127.4A 2014-11-05 2014-11-05 Transmission shaft fork axle new technique for forging CN104439027B (en)

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Application Number Priority Date Filing Date Title
CN201410615127.4A CN104439027B (en) 2014-11-05 2014-11-05 Transmission shaft fork axle new technique for forging

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CN104889225B (en) * 2015-05-18 2017-03-08 东莞市联洲知识产权运营管理有限公司 A kind of trimming clicker press machine
CN105290291B (en) * 2015-11-03 2017-09-19 江苏龙城精锻有限公司 The enclosed blocking shaping dies and its technique of a kind of special-shaped oil injector body blank
CN105583351B (en) * 2015-12-19 2018-06-15 许昌中兴锻造有限公司 The medium-sized flat forging process of slip shaft yoke
CN105855799A (en) * 2016-04-21 2016-08-17 昌利锻造有限公司 Machining method of axial joint fork
CN108115366A (en) * 2017-12-29 2018-06-05 陈萍 A kind of metal floor drain processing technology
CN110814248A (en) * 2019-10-10 2020-02-21 中国第一汽车股份有限公司 Flash-free hot die forging forming process for front shell forging of automobile differential

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