CN104525816A - Forging device and process for flange yoke of transmission shaft - Google Patents

Forging device and process for flange yoke of transmission shaft Download PDF

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Publication number
CN104525816A
CN104525816A CN201410734907.0A CN201410734907A CN104525816A CN 104525816 A CN104525816 A CN 104525816A CN 201410734907 A CN201410734907 A CN 201410734907A CN 104525816 A CN104525816 A CN 104525816A
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CN
China
Prior art keywords
forging
core rod
seam
counterdie
die
Prior art date
Application number
CN201410734907.0A
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Chinese (zh)
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CN104525816B (en
Inventor
戚利明
Original Assignee
万向钱潮传动轴有限公司
万向集团公司
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Application filed by 万向钱潮传动轴有限公司, 万向集团公司 filed Critical 万向钱潮传动轴有限公司
Priority to CN201410734907.0A priority Critical patent/CN104525816B/en
Publication of CN104525816A publication Critical patent/CN104525816A/en
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Publication of CN104525816B publication Critical patent/CN104525816B/en

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Classifications

    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025Closed die forging

Abstract

The invention relates to forging device and process for a flange yoke of a transmission shaft. The device comprises an upper die and a lower die; a die core is embedded into the center of a die base; a die core hanger lever at the lower end of the die core is aligned to the bottom surface of the die base, and while a die core spigot at the upper end of the die core extends out from the die base; a forging cavity is formed in the center of the lower die; a filling cavity in the center of the lower die communicates with the forging cavity; a lower die spigot is formed in the center of the lower die above the forging cavity; the die core spigot is guided into the lower die spigot when forging processing. The processing method comprises the steps of 1) blanking and heating a blank of the flange yoke; 2) filling the heated material into the forging cavity through the filling cavity, and upsetting; 3) introducing the die core spigot of the upper die into the lower die spigot, and then finally forging and molding. The forging device and process have the beneficial effects that the material consumption is reduced, the dimension precision of the forging is improved, and the rejection rate is decreased.

Description

A kind of forging processing unit (plant) of transmission shaft flange fork and processing technology

Technical field

The invention belongs to technical field of forging, particularly relate to forging processing unit (plant) and the processing technology of a kind of transmission shaft flange fork.

Background technology

Have parts to be flanged yoke in the vehicle driving shaft assembly that our company produces, large end face is disc-shape, process program---shaping of-the finish-forging----trimming that is jumping-up adopted after the heating of this part blank.

The design (as Fig. 1) of common shaping mould: in center (separating with the double dot dash line) parting of disk, stay the flash thickness of 2.5 ~ 3.5mm; In forging process, forging is full of die cavity, overlap 6 is formed after simultaneously unnecessary metal flows out, overlap 6 (as Fig. 2) is being excised with trimming punch press, (forging+overlap) material after forging is put into trim die 4, by trimming punch 5 upper and lower motion in trim die 4, form forging 3 and overlap 6, finally retain useful part forging 3.

The defect of existing process program is:

1, the utilization rate of material is low, about about 75%;

2, because forging is high vibratory equipment, mismatch amount is unstable, and mismatch amount is generally at about 0.8mm;

3, need trimming, trimming increases, and trimming can bring the quality problems such as trimming distortion.

Summary of the invention

The object of the invention is to overcome the deficiency that prior art exists, and a kind of utilization rate, the forging processing unit (plant) pitched without the need to the transmission shaft flange of trimming and the processing technology that improve material are provided.

The object of the invention is to have come by following technical solution.The forging processing unit (plant) of this transmission shaft flange fork, comprise upper die and lower die, described patrix adopts block insert type structure, is made up of core rod, mold base, positioning key; Described core rod is embedded in mold base intracardiac, and the core rod suspension gear of this core rod lower end is concordant with the bottom surface of mold base, and is located fixing by positioning key, and the core rod seam of core rod upper end stretches out in mold base; Intracardiacly in described counterdie offer forging die cavity, intracardiacly in counterdie be provided with filling cavity and communicate with this forging die cavity, intracardiacly in the counterdie above this forging die cavity offer counterdie seam; Described core rod seam adds in forging and is directed in man-hour in counterdie seam.

As preferably, the lead-in portion of described core rod seam is mismatch amount with the size phase difference between counterdie seam, and this mismatch amount is less than 0.3mm.

As preferably, the described core rod seam importing length be directed in counterdie seam is 10 ~ 15mm.

As preferably, described core rod hangs the diameter 30mm larger than core rod seam diameter of gear.

A processing technology for the forging processing unit (plant) utilizing transmission shaft flange described above to pitch, comprises the steps:

1), to flanged yoke blank carry out blanking and heat, the weight of this blanking is forge weight+expect hot burn out rate;

2), be poured in forging die cavity to the material after heating by filling cavity, now the core rod seam of patrix is directed in counterdie seam, and the end contact of core rod seam is in the surface of forging blank also jumping-up;

3), the core rod seam of patrix derives in counterdie seam, and finish-forging is shaped.

Beneficial effect of the present invention is:

1, improve the utilization rate (weight of former forging processing blanking is the hot burn out rate of the weight+material of the weight+overlap of forging) of disc-like flanged yoke material, after adopting the present invention, the weight of blanking is the weight+hot burn out rate of forging, saved the weight of overlap, after general this invention of employing, the utilization rate of material is more than 98%;

The flanged yoke mismatch amount of 2, common disc-like band pit is at about 0.8mm, simultaneously because forging process equipment is high vibratory equipment, cause mismatch amount unstable, after adopting the present invention, the core rod of patrix directly imports in counterdie seam, and the size of the lead-in portion of the core rod of patrix differs 0.3mm with the size in counterdie die cavity simultaneously; Make this mismatch amount control within 0.3mm, improve the stability of mismatch amount simultaneously;

3, (cost of former technique comprises heating cost, jumping-up, finish-forging cost, trimming cost to decrease the forging processing cost of disc-like flanged yoke; After adopting the present invention, cost comprises heating cost, jumping-up, finish-forging cost; The quality problems of the trimming distortion brought when decreasing one trimming cost and trimming).

Accompanying drawing explanation

Fig. 1 is the structural representation of existing upper and lower matched moulds.

Fig. 2 is the structural representation of existing trimming device.

Fig. 3 is the structural representation of upper and lower matched moulds of the present invention.

Fig. 4 is the structural representation of patrix of the present invention.

Fig. 5 is the structural representation of counterdie of the present invention.

Label in accompanying drawing is respectively: 1, patrix; 2, counterdie; 3, forging; 4, trim die; 5, trimming punch; 6, overlap; 7, mismatch amount; 11, core rod; 12, mold base; 13, positioning key; 21, forging die cavity; 22, filling cavity; 23, counterdie seam; 111, core rod hangs gear; 112, core rod seam.

Detailed description of the invention

Do detailed introduction below in conjunction with accompanying drawing to the present invention: as shown in accompanying drawing 3 to 5, the present invention includes patrix 1 and counterdie 2, described patrix 1 adopts block insert type structure, is made up of core rod 11, mold base 12, positioning key 13; Described core rod 11 is embedded in mold base 12 intracardiac, the core rod suspension gear 111 of this core rod 11 lower end is concordant with the bottom surface of mold base 12, and located by positioning key 13 and fixedly prevent patrix from dropping, the core rod seam 112 of core rod 11 upper end stretches out in mold base 12; Intracardiacly in described counterdie 2 offer forging die cavity 21, intracardiacly in counterdie 2 be provided with filling cavity 22 and communicate with this forging die cavity 21, intracardiacly in the counterdie 2 above this forging die cavity 21 offer counterdie seam 23; Described core rod seam 112 adds in forging and is directed in man-hour in counterdie seam 23, and the core rod seam 112 of this patrix presses the counterdie seam 23 dimensional fits processing of counterdie.

The lead-in portion of described core rod seam 112 is mismatch amount 7 with the size phase difference between counterdie seam 23, and this mismatch amount 7 is less than 0.3mm; This mismatch amount 7 can not more than 0.3mm, and when more than 0.3mm, overlap can be extruded from the matched moulds of upper and lower mould.

The described core rod seam 112 importing length be directed in counterdie seam 23 is 10 ~ 15mm, and its angle importing angle is 90 °.

Described core rod hangs the diameter 30mm larger than core rod seam 112 diameter of gear 111.

A processing technology for the forging processing unit (plant) of transmission shaft flange fork, comprises the steps:

1), to flanged yoke blank carry out blanking and heat, the weight of this blanking is forge weight+expect hot burn out rate;

2), be poured in forging die cavity 21 to the material after heating by filling cavity 22, now the core rod seam 112 of patrix 1 is directed in counterdie seam 23, and the end contact of core rod seam 112 is in the surface of forging blank also jumping-up;

3), the core rod seam 112 of patrix 1 derives in counterdie seam 23, and finish-forging is shaped.

Power transmission shaft disc flange of the present invention is pitched closed forging processing technology and is decreased material consumption (utilization rate of material is more than 98%, except hot-working burn out rate), improve the dimensional accuracy (mismatch amount controls within 0.3mm) of forging, reduce percent defective (non-trimming, therefore without the need to trimming operation, thus avoid trimming distortion).

Be understandable that, for a person skilled in the art, technical scheme of the present invention and inventive concept be equal to and replace or change the protection domain that all should belong to the claim appended by the present invention.

Claims (5)

1. the forging processing unit (plant) of a transmission shaft flange fork, comprise patrix (1) and counterdie (2), it is characterized in that: described patrix (1) adopts block insert type structure, is made up of core rod (11), mold base (12) and positioning key (13); Described core rod (11) is embedded in mold base (12) intracardiac, core rod suspension gear (111) of this core rod (11) lower end is concordant with the bottom surface of mold base (12), and located fixing by positioning key (13), the core rod seam (112) of core rod (11) upper end stretches out in mold base (12); Intracardiacly in described counterdie (2) offer forging die cavity (21), intracardiacly in counterdie (2) be provided with filling cavity (22) and communicate with this forging die cavity (21), intracardiacly in the counterdie (2) of this forging die cavity (21) top offering counterdie seam (23); Described core rod seam (112) adds in forging and is directed in man-hour in counterdie seam (23).
2. the forging processing unit (plant) of transmission shaft flange fork according to claim 1, it is characterized in that: the lead-in portion of described core rod seam (112) is mismatch amount (7) with the size phase difference between counterdie seam (23), and this mismatch amount (7) is less than 0.3mm.
3. the forging processing unit (plant) of transmission shaft flange fork according to claim 1, is characterized in that: described core rod seam (112) the importing length be directed in counterdie seam (23) is 10 ~ 15mm.
4. the forging processing unit (plant) of transmission shaft flange fork according to claim 1, is characterized in that: described core rod hangs the diameter 30mm larger than core rod seam (112) diameter of gear (111).
5. adopt a processing technology for the forging processing unit (plant) of transmission shaft flange as claimed in claim 1 fork, it is characterized in that: comprise the steps:
1), to flanged yoke blank carry out blanking and heat, the weight of this blanking is forge weight+expect hot burn out rate;
2), be poured in forging die cavity (21) to the material after heating by filling cavity (22), now the core rod seam (112) of patrix (1) is directed in counterdie seam (23), and the end contact of core rod seam (112) is in the surface of forging blank also jumping-up;
3), the core rod seam (112) of patrix (1) derives in counterdie seam (23), and finish-forging is shaped.
CN201410734907.0A 2014-12-05 2014-12-05 A kind of forging processing unit (plant) of transmission shaft flange fork and processing technique CN104525816B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410734907.0A CN104525816B (en) 2014-12-05 2014-12-05 A kind of forging processing unit (plant) of transmission shaft flange fork and processing technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410734907.0A CN104525816B (en) 2014-12-05 2014-12-05 A kind of forging processing unit (plant) of transmission shaft flange fork and processing technique

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CN104525816A true CN104525816A (en) 2015-04-22
CN104525816B CN104525816B (en) 2017-03-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105171365A (en) * 2015-09-29 2015-12-23 陕西法士特齿轮有限责任公司 Deep cavity thin-wall flange piece composite forging molding method
CN105522086A (en) * 2015-05-21 2016-04-27 安阳联达数控精密锻造股份有限公司 Compound extruding-forging forming method of automobile transmission shaft slip yoke
CN105710268A (en) * 2016-04-01 2016-06-29 中信戴卡股份有限公司 Die for forging production of aluminum alloy control arms
CN106607533A (en) * 2015-10-27 2017-05-03 陕西宏远航空锻造有限责任公司 Forging method for Y-shaped blanks made of plastic materials
CN107138673A (en) * 2017-06-29 2017-09-08 太仓久信精密模具股份有限公司 A kind of cold-extruded pressurized overflow forming technology of oil pump cover plate
CN108406246A (en) * 2018-05-29 2018-08-17 河南九环汽车零部件有限公司 A kind of production technology of truck drive shaft flange york

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030196468A1 (en) * 2002-04-19 2003-10-23 Ngk Spark Plug Co., Ltd. Method of making a flanged tubular metallic part
CN1465455A (en) * 2002-07-02 2004-01-07 杭州万向传动轴有限公司 Technology for producing preformed blank of flange and fork group products, and special die
CN102039361A (en) * 2009-10-16 2011-05-04 上海交大中京锻压有限公司 Composite extrusion forge forming method for automobile flange fork
CN102240763A (en) * 2011-04-16 2011-11-16 湖北三环锻造有限公司 Medium-heavy automobile flange die forging process and punching and calibrating composite die thereof
CN202239432U (en) * 2011-08-30 2012-05-30 山东远大模具材料有限公司 Stress embedded type flange disc forging mold
CN202779455U (en) * 2012-09-12 2013-03-13 襄阳金锤锻造有限公司 Flange structure molding die

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030196468A1 (en) * 2002-04-19 2003-10-23 Ngk Spark Plug Co., Ltd. Method of making a flanged tubular metallic part
CN1465455A (en) * 2002-07-02 2004-01-07 杭州万向传动轴有限公司 Technology for producing preformed blank of flange and fork group products, and special die
CN102039361A (en) * 2009-10-16 2011-05-04 上海交大中京锻压有限公司 Composite extrusion forge forming method for automobile flange fork
CN102240763A (en) * 2011-04-16 2011-11-16 湖北三环锻造有限公司 Medium-heavy automobile flange die forging process and punching and calibrating composite die thereof
CN202239432U (en) * 2011-08-30 2012-05-30 山东远大模具材料有限公司 Stress embedded type flange disc forging mold
CN202779455U (en) * 2012-09-12 2013-03-13 襄阳金锤锻造有限公司 Flange structure molding die

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105522086A (en) * 2015-05-21 2016-04-27 安阳联达数控精密锻造股份有限公司 Compound extruding-forging forming method of automobile transmission shaft slip yoke
CN105171365A (en) * 2015-09-29 2015-12-23 陕西法士特齿轮有限责任公司 Deep cavity thin-wall flange piece composite forging molding method
CN106607533A (en) * 2015-10-27 2017-05-03 陕西宏远航空锻造有限责任公司 Forging method for Y-shaped blanks made of plastic materials
CN105710268A (en) * 2016-04-01 2016-06-29 中信戴卡股份有限公司 Die for forging production of aluminum alloy control arms
CN107138673A (en) * 2017-06-29 2017-09-08 太仓久信精密模具股份有限公司 A kind of cold-extruded pressurized overflow forming technology of oil pump cover plate
CN107138673B (en) * 2017-06-29 2020-04-28 太仓久信精密模具股份有限公司 Cold extrusion overflow forming process of oil pump cover plate
CN108406246A (en) * 2018-05-29 2018-08-17 河南九环汽车零部件有限公司 A kind of production technology of truck drive shaft flange york

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