CN102601146A - Cold extrusion die for spur gear - Google Patents

Cold extrusion die for spur gear Download PDF

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Publication number
CN102601146A
CN102601146A CN2012100591591A CN201210059159A CN102601146A CN 102601146 A CN102601146 A CN 102601146A CN 2012100591591 A CN2012100591591 A CN 2012100591591A CN 201210059159 A CN201210059159 A CN 201210059159A CN 102601146 A CN102601146 A CN 102601146A
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CN
China
Prior art keywords
die
cavity
push
cushion block
seaming chuck
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Pending
Application number
CN2012100591591A
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Chinese (zh)
Inventor
张才军
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SICHUAN MIANYANG ZHONGYE GEAR CO Ltd
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SICHUAN MIANYANG ZHONGYE GEAR CO Ltd
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Priority to CN2012100591591A priority Critical patent/CN102601146A/en
Publication of CN102601146A publication Critical patent/CN102601146A/en
Pending legal-status Critical Current

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Abstract

A cold extrusion die for a spur gear comprises a die set consisting of a lower die holder (21), an upper die holder (22) and a guide post (25). The cold extrusion die is characterized in that an annular die cavity (2) is fixed to the lower side of the upper die holder (22), a bottom mat, an upper pressure head fixing sleeve (6), an upper pressure head (7) and an upper pressure head locking ring (8) are sequentially mounted in the annular die cavity (2) from top to bottom, a lower die cavity (13) is fixed onto the lower die holder (21), a cushion block, a female die ring (16), a lower pressure head fixing sleeve (15), a lower pressure head (11), a toothed die (14), a lower female die (9), a guide sleeve (10) and a lower washer (12) are sequentially mounted in the lower die cavity (13) from bottom to top, the lower washer (12) is fixed onto the lower die cavity (13), the upper pressure head (7) and the lower pressure head (11) are positioned on the same axis, a shaft hole is arranged at the bottom of the lower die holder (21), crescent holes are arranged on the cushion block and the lower pressure head fixing sleeve (15), and an ejector rod (19) penetrates through the shaft hole and the crescent holes and extends into a die cavity of the toothed die (14).

Description

The spur gear wheel cold extrusion die
One, technical field:
The invention belongs to a kind of device of big modulus spur gear wheel processing technique field, be specifically related to the spur gear wheel cold extrusion die of once-forming.
Two, background technology:
Spur gear wheel has purposes widely; Can be used for the powerful electric tool or the transmission mechanism of other assemblies mechanically; Spur gear wheel is mainly used in planetary gear, the sun gear of heavy-duty car back axle; The direction that drives the steering gear middle rack moves, and is requisite driving member in the heavy-duty car transmission.
The existing processing method of spur gear wheel is mainly machine cut processing, according to traditional explained hereafter, and boring, rough turn endoporus, finish turning; Draw tooth or gear shaping to profile of tooth again, wherein with regard to tooth Profile Machining, on average each profile of tooth need be taken 15-20 minute; The processing of endoporus also will be carried out processing such as reaming except boring, thus the cycle of processing a product about 40 minutes, and consumable quantity is big; Waste is serious, and employed cutter very easily damages, and processing is unstable; And complicated, working strength of workers is high, because cut can produce major defects such as " the profile of tooth calibration are inhomogeneous "; Cut can cause metallic fiber to be cut off simultaneously, so that the spur gear wheel intensity that processes reduces the shortening in service life.
Find through after the retrieval to prior art; The someone adopts the method for extrusion forging to produce spur gear wheel in recent years; B.A.Behrens; E.Doege etc. adopt complete closed molds hot extrusion forging and molding, see B.A.Behrens, E.Doegeet; Precisinion forging processes for high duty automotive components (precision forging technology in the high-strength automotive part production), Journal.of Materials Processing Technology Vol.185 (2007): 139146; S.Y.Jung introduces in the moulds such as M.C.Kang blank is squeezed into spur gear.Said method all adopts closed molds to forge, and forging force is big, and die life is low.
There is the people also to attempt adopting the cold-stamped mode to realize that Gear Processing for example proposes to realize through the mode of extruding in Chinese patent CN200510017621.1 before this; Promptly adopt the forward extrusion forming technology, do not shape when still relating to hole and tooth.And the mould structure aspect exists certain unreasonable, and die life and product precision be difficult for guaranteeing, therefore causes practical significance too not big in actual production.
Three, summary of the invention:
The present invention is directed to the deficiency that exists in the prior art, a kind of spur gear wheel cold extrusion die of once-forming is provided.
Operation principle of the present invention is: utilize the principle of metal material plastic deformation, described blank and die assembly are installed in the mould bases in a certain order, under the condition that guarantees its axiality and perpendicularity; Blank is put in the fairlead, under the situation that keeps fixing at upper bolster, rising hydraulic press hydraulic jack; Drive die shoe and slowly move up, perhaps under die shoe keeps fixing situation, decline hydraulic press hydraulic jack; Drive upper bolster and slowly move down, seaming chuck contacts with blank slowly, and applies bigger power; Blank is pushed in the tooth mould, and after this seaming chuck continues to apply bigger power to blank, makes blank generation plastic deformation; Thereby accomplish the action of pressing hole and pressure tooth with the mode of once-forming, return die shoe or upper bolster then, formed tooth is ejected mould bases through push rod; Just accomplish once compacting action, obtain the spur gear wheel semi-finished product.
The present invention specifically realizes through following technical scheme:
A kind of spur gear wheel cold extrusion die comprises the mould bases that is made up of die shoe, upper bolster, lead, wherein:
Upper bolster is fixed on the lead, has the hole of matching with lead on the die shoe, and lead passes this Kong Houyu die shoe movingly;
Perhaps die shoe is fixed on the lead, has the hole of matching with lead on the upper bolster, and lead passes this Kong Houyu upper bolster movingly;
It is characterized in that:
Through bolt annular die cavity is arranged below the upper bolster; Heelpiece is housed in the annular die cavity from top to bottom successively, the seaming chuck fixed cover, interference fit has seaming chuck in the seaming chuck fixed cover; The seaming chuck binding ring is housed below the seaming chuck fixed cover, and the seaming chuck binding ring is fixed on the annular die cavity through screw;
Through bolt lower mode cavity is arranged above the die shoe, cushion block, die circle are housed in the lower mode cavity from bottom to top successively; Be loaded on the push-down head fixed cover in the die circle, the push-down head of interference fit in the push-down head fixed cover, the centre has the tooth mould of die cavity; Lower cavity die; Interference fit has fairlead in the lower cavity die, and lower gasket is housed above the lower cavity die, and lower gasket is through being bolted on the lower mode cavity;
Seaming chuck and push-down head are positioned on the same axis;
Push-down head top is arranged in the die cavity of tooth mould;
Die shoe bottom has axis hole, has the crescent moon hole on cushion block, the push-down head fixed cover, has a crescent push rod to pass the axis hole of die shoe bottom, stretches in the die cavity of tooth mould after passing the crescent moon hole again.
Preferably: heelpiece comprises heelpiece, goes up middle pad, middle pad retainer ring, and fills up in the retainer ring during cushion cover is contained in going up.
Preferably: cushion block comprises cushion block on die lower cushion block and the die, and cushion block is loaded in the die circle on the die.
Preferably: the lower mode cavity retainer ring is housed, lower mode cavity retainer ring and lower mode cavity interference fit between cushion block and die shoe.
Preferably: the tooth mould is made up of the hard-metal insert mould of cover and internal layer in the tooth mould of outer field tooth mould overcoat, centre.
Preferably: go up heelpiece and annular die cavity interference fit, middle pad retainer ring and last middle pad interference fit.
Usually: go up heelpiece and be placed in the upper bolster; Be mainly interference fit; Last heelpiece and annular die cavity carry out interference fit, and middle pad retainer ring and last middle pad carry out interference fit, and seaming chuck and seaming chuck fixed cover are in engagement process; Not only to guarantee the necessary magnitude of interference, to guarantee simultaneously seaming chuck perpendicularity and with the dead in line of whole secondary mould; Lower cavity die and fairlead are interference fit, note regulating the magnitude of interference, simultaneously; In the process that cooperates, reserve certain compacting surplus, suppress cooperation through the pressure of hydraulic press, the tooth mould is made up of cover and hard-metal insert mould three parts in tooth mould overcoat, the tooth mould; The tooth mould is placed in below the lower cavity die, and push-down head and push-down head fixed cover are reserved after the compacting amount and the cooperation of die circle through interference fit; The push-down head fixed cover is placed on the die on the cushion block, feeds push rod, and the die lower cushion block plays supporting role; Under cushion block on the die, be the lower mode cavity retainer ring successively, lower mode cavity retainer ring and lower mode cavity carry out interference fit; Push-down head fixed cover wherein, cushion block all has the crescent moon through hole on the die, to make things convenient for the upper and lower displacement of push rod; Seaming chuck and seaming chuck fixed cover carry out interference fit; The hardness of seaming chuck and toughness have high requirement; Polishing more need be carried out in the top; Seaming chuck generally adopts Cr12MoV steel system and modified body such as LD (7Cr7Mo2V2Si), DC53 etc. or high-speed steel, in engagement process, reserves the compacting amount, accomplishes cooperation through the pressure of hydraulic press.Seaming chuck and seaming chuck fixed cover play the location in pressing process, and play a part applied thrust, and blank is contacted with tooth mould, push-down head, and this fit and structure have increased lifting surface area greatly, make mould durable in use; Push-down head and push-down head fixed cover are most crucial in the spur gear wheel cold extrusion die; Also be the high part of requirement, the hardness and the toughness reguirements of push-down head are high, owing to born most power; Therefore, the profile of push-down head, tapering all have strict requirement in design process.In installation process, to guarantee its axiality and perpendicularity especially; Push-down head and push-down head fixed cover play a part to press the hole in pressing process; Through the thrust that seaming chuck applies, push-down head is given the blank reaction force, causes blank generation plastic deformation and the endoporus that makes; The design of this profile and tapering helps bearing bigger power more, and increased the service life of mould; The tooth mould is most important parts in the spur gear wheel cold extrusion die, equally also is the highest part of requirement, and the tooth mould mainly is made up of cover, hard-metal insert mould in tooth mould overcoat, the tooth mould; In pressing process, play a part capable tooth, general 45 steel that adopt of tooth mould overcoat, cover adopts 60Si2Mn in the tooth mould; Since the employing once-forming, so the precision of hard-metal insert mould and wearability requirement are quite high, the hard-metal insert mould partly adds must adopt the silk of being careful man-hour; Guarantee its machining accuracy, adopt this structure Design and installation to be convenient to practice thrift cost, the control material; The teeth directional of formed tooth, profile of tooth all can reach the standard code of country, need not reprocessing; Lower cavity die and fairlead belong to interference fit, in process, need to reserve the pressing height, and fairlead requires to have higher hardness; The general Cr12MoV that adopts; Lower cavity die and fairlead play a part positioning and guiding, adopt the mould of this structure not only to improve in extrusion process and can bear bigger power, and in pressing process for a long time, can not occur being out of shape or stress is excessive ftractures because of the blank plastic deformation; Control cost simultaneously, practiced thrift material; The crescent moon hole is generally a plurality of holes that are distributed on the same circumference, and correspondingly, push rod also constitutes (be equivalent to an end of cylindrical wall is cut off polylith vertically, the other end links to each other again) by same quantity crescent moon sheet.
The present invention applies to the cold extrusion forging method production of big modulus spur gear wheel; Not only can improve the deficiency that exists in existing machinery cutting process and the gear shaping method, and suppress the endoporus and the profile of tooth of gear, prolong the service life of mould especially with the mode of once-forming; Be convenient to production operation; Be beneficial to the saving cost, improved production efficiency simultaneously, stock utilization and product precision.But prior art is not seen the technology of pressing tooth and one step of pressure hole to accomplish, and prior art is to accomplish in two steps.
The present invention has adopted cold-extrusion shaping to substitute cut, and metal streamline is complete, has improved the intensity and the comprehensive mechanical performance of gear, has improved the bearing capacity and the service life of gear.With respect to prior art, adopt mould of the present invention to carry out the spur gear wheel part processing, the profile of tooth endoporus after the extruding is shaped only needs about 20 seconds; And settle at one go, practiced thrift the production time, this is an ELEMENTARY INTRODUCTION TO NON metal forming technology simultaneously; Stock utilization can be up to 90%; Labor strength is low, only needs people's simple button operation just can accomplish, and is more convenient.
Four, description of drawings
Fig. 1 is the overall structure sketch map of the embodiment of the invention;
Fig. 2 is the structure chart of tooth mould.
Fig. 3 is the half-finished part drawing of spur gear wheel after this Mould Machining of employing;
Among the figure: 1, go up heelpiece; 2, annular die cavity; 3, go up middle pad; 4, screw; 5, middle pad retainer ring; 6, seaming chuck fixed cover; 7, seaming chuck; 8, seaming chuck binding ring; 9, lower cavity die; 10, fairlead; 11, push-down head; 12, lower gasket; 13, lower mode cavity; 14, tooth mould; 15, push-down head fixed cover; 16, die circle; 17, cushion block on the die; 18, die lower cushion block; 19, push rod; 20, push rod cushion block; 21, die shoe; 22, upper bolster; 23, lower mode cavity retainer ring; 24, guide pin bushing; 25, lead; 26, tooth mould overcoat; 27, overlap in the tooth mould; 28, hard-metal insert mould.
Five, the specific embodiment:
Below in conjunction with accompanying drawing embodiments of the invention are carried out detailed explanation, present embodiment is a prerequisite with technical scheme of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, a kind of spur gear wheel cold extrusion die comprises the mould bases that is made up of die shoe 21, upper bolster 22, lead 25, wherein:
Upper bolster 22 is fixed on the lead 25 through guide pin bushing 24, has the hole of matching with lead 25 on the die shoe 21, and lead 25 passes this Kong Houyu die shoe 21 movingly;
Through bolt annular die cavity 2 is arranged below the upper bolster 22; Heelpiece is housed in the annular die cavity 2 from top to bottom successively; Seaming chuck fixed cover 6; Interference fit has seaming chuck 7 in the seaming chuck fixed cover 6, seaming chuck binding ring 8 is housed below the seaming chuck fixed cover 6, and seaming chuck binding ring 8 is fixed on the annular die cavity 2 through screw 4;
Through bolt lower mode cavity 13 is arranged above the die shoe 21, cushion block, die circle 16 are housed in the lower mode cavity 13 from bottom to top successively; Be loaded on the push-down head fixed cover 15 in the die circle 16, the push-down head 11 of interference fit in push-down head fixed cover 15, the centre has the tooth mould 14 of die cavity; Lower cavity die 9; Interference fit has fairlead 10 in the lower cavity die 9, and lower gasket 12 is housed above the lower cavity die 9, and lower gasket 12 is through being bolted on the lower mode cavity 13;
Seaming chuck 7 is positioned on the same axis with push-down head 11;
Push-down head 11 tops are arranged in the die cavity of tooth mould 14;
Die shoe 21 bottoms have axis hole, have the crescent moon hole on cushion block, the push-down head fixed cover 15, have a crescent push rod 19 to pass the axis hole of die shoe 21 bottoms, stretch in the die cavity of tooth mould 14 after passing the crescent moon hole again.
Heelpiece comprises heelpiece 1, go up in pad 3, middle pad retainer ring 5, and during pad 3 is sleeved in going up in the pad retainer ring 5.
Cushion block comprises cushion block 17 on die lower cushion block 18 and the die, and cushion block 17 is loaded in the die circle 16 on the die.
Between cushion block and die shoe 21, lower mode cavity retainer ring 23 is housed, lower mode cavity retainer ring 23 and lower mode cavity 13 interference fit.
Tooth mould 14 is made up of the hard-metal insert mould 28 of cover 23 and internal layer in outer field tooth mould overcoat 26, the middle tooth mould.
Last heelpiece 1 and annular die cavity 2 interference fit, middle pad retainer ring 5 and last middle pad 3 interference fit.
Wherein:
Annular die cavity 2 passes through bolt in upper bolster 22; Lay heelpiece 1 successively and fill up 3 with middle pad retainer ring 5 and in going up; Through screw 4 seaming chuck binding ring 8 is connected with annular die cavity 2 fixing, seaming chuck fixed cover 6 and seaming chuck 7 middle pad retainer ring 5 with in fill up below 3.Fairlead 10 is placed in the lower cavity die 9; Tooth mould 14 is below lower cavity die 9; The tooth mould is laid push-down head fixed cover 15 14 times; Cushion block 17 and die circle 16 on the die have push-down head 11 and push-down head fixed cover 15 above cushion block on the die 17, die lower cushion block 18, push rod cushion block 20 and push rod 19 are placed in die circle 16 belows.
Last heelpiece 1 is placed in the upper bolster 22, is interference fit, and last heelpiece 1 carries out interference fit with annular die cavity 2; Guarantee that the magnitude of interference is not less than 0.2mm, middle pad retainer ring 5 carries out interference fit with last middle pad 3, and the magnitude of interference is not less than 0.2mm; Seaming chuck 7 and seaming chuck fixed cover 6 are in engagement process; Not only to guarantee to be not less than the magnitude of interference of 0.2mm, simultaneously, guarantee seaming chuck 7 perpendicularity and with the dead in line of whole secondary mould.
Lower cavity die 9 is an interference fit with fairlead 10, notes regulating the magnitude of interference, simultaneously; In the process that cooperates, reserve the compacting surplus of 10-12mm, suppress cooperation through the pressure of hydraulic press, tooth mould 14 is made up of cover 27 and hard-metal insert mould 28 3 parts in tooth mould overcoat 26, the tooth mould; Tooth mould 14 is placed in below the lower cavity die 9, and push-down head 11 passes through interference fit with push-down head fixed cover 15, reserves after the compacting amount and 16 cooperations of die circle; Push-down head fixed cover 15 is placed on the die on the cushion block 17; Feed push rod 19, die lower cushion block 18 plays supporting role, under cushion block on the die 17; Be lower mode cavity retainer ring 23 successively, lower mode cavity retainer ring 23 carries out interference fit with lower mode cavity 13.Wherein the push-down head fixed cover 15, all have two crescent moon through holes on the die on the cushion block 17, to make things convenient for the upper and lower displacement of push rod 19.
Seaming chuck 7 carries out interference fit with seaming chuck fixed cover 6; Use level is not less than 0.2mm; The hardness of seaming chuck 7 and toughness have high requirement, and polishing more need be carried out in the top, seaming chuck 7 general LD (7Cr7Mo2V2Si) steel that adopt; In engagement process, reserve compacting amount 10-12mm, accomplish cooperation through the pressure of hydraulic press.Seaming chuck 7 plays the location with seaming chuck fixed cover 6 in pressing process, and plays a part applied thrust, and blank is contacted with tooth mould 14, push-down head 11, and this fit and structure have increased lifting surface area greatly, make mould durable in use.
Push-down head 11 is most crucial in the spur gear wheel cold extrusion die with push-down head fixed cover 15; Also be the high part of requirement, the hardness and the toughness reguirements of push-down head 11 are high, owing to born most power; Therefore, the profile of push-down head 11, tapering all have strict requirement in design process.In installation process, to guarantee its axiality and perpendicularity≤0.015mm especially.Push-down head 11 plays a part to press the hole with push-down head fixed cover 15 in pressing process; The thrust that applies through seaming chuck 7; Push-down head 11 is given the blank reaction force; The endoporus that causes blank generation plastic deformation and make, the design of this profile and tapering helps bearing bigger power more, and increased the service life of mould.
Tooth mould 14 is most important positions in the spur gear wheel cold extrusion die, equally also is the highest part of requirement, tooth mould 14 mainly by overlap 27 in tooth mould overcoat 26, the tooth mould, hard-metal insert mould 28 forms; In pressing process, play a part capable tooth, tooth mould overcoat 26 general No. 45 steel, the cover 27 employing 60Si2Mn in the tooth mould of adopting; Because the employing once-forming; So it is quite high that the precision of hard-metal insert mould 28 and wearability require, hard-metal insert mould 28 adds must adopt the silk of being careful man-hour, guarantees that its machining accuracy is not more than 0.005mm; Adopt this structure Design and installation to be convenient to practice thrift cost; The control material, the teeth directional of formed tooth, profile of tooth all can reach the standard code of country, need not reprocessing.
Lower cavity die 9 belongs to interference fit with fairlead 10, in process, needs to reserve pressing height 10-12mm, and fairlead 10 requires that higher hardness is arranged, and generally adopts Cr12MoV.Lower cavity die 9 plays a part positioning and guiding with fairlead 10; Adopt the mould of this structure not only to improve in extrusion process and can bear bigger power, and in pressing process for a long time, can not occur being out of shape or stress is excessive ftractures because of the blank plastic deformation.Control cost simultaneously, practiced thrift material.
Present embodiment can be installed in the following manner:
At first annular die cavity 2 is connected on the upper bolster 22 through bolt, pays attention to the adjusting of dynamics, will go up heelpiece 1 successively and be installed on annular die cavity 2 inside; Pad 3 is installed in the annular die cavity 2 with middle pad retainer ring 5 in will going up then, realizes interference fit, installs pressure head fixed cover 6 and seaming chuck 7 successively; And seaming chuck fixed cover 6 carries out interference fit with seaming chuck 7, and (interference fit is used for being fastenedly connected of hole, between centers; Not allowing has relative motion between the two), to reach higher perpendicularity and axiality, through fixing of seaming chuck binding ring 8; And adjust dynamics, guarantee the precision of installing.
Through bolt lower mode cavity 13 is fixed on the die shoe 21 subsequently; Place lower mode cavity retainer ring 23 successively, lower mode cavity retainer ring 23 is interference fit with lower mode cavity 13, prevents among the course of work, to break away from thereby the degree of depth that requires die cavity retainer ring 23 to exceed die shoe 21 about 10-15mm has enough magnitudes of interference that die shoe is held tightly with assurance; Lay cushion block 17 on die circle 16 and the die simultaneously; Push-down head fixed cover 15 and push-down head 11 are positioned on the die above the cushion block 17, and press down headgear 15 bottom surfaces and will finish grind processing, so that push-down head 11 keeps certain perpendicularity and axiality; Again push rod 19 is touched push rod cushion block 20 through the crescent moon hole; Put lower tooth mold 14 and lower cavity die 9 and fairlead 10, counterdie is fixed, guarantee to install precisely through lower gasket 12 and bolt.
Wherein, die shoe 21, upper bolster 22, guide pin bushing 24, guide pillar 25 all belong to the structure on the universal die set.
Operation principle is: utilize the principle of metal material plastic deformation, described blank and die assembly are installed in the mould bases, under the condition that guarantees its axiality and perpendicularity; Blank is put in the fairlead, under the situation that keeps fixing at upper bolster, rising hydraulic press hydraulic jack; Drive die shoe and slowly move up, seaming chuck contacts with blank slowly, and applies bigger power; Blank is pushed in the tooth mould, and after this seaming chuck continues to apply bigger power to blank, makes blank generation plastic deformation; Thereby accomplish the action of pressing hole and pressure tooth with the mode of once-forming, return die shoe then, formed tooth is ejected mould bases through push rod; Just accomplish once compacting action, obtain the spur gear wheel semi-finished product.

Claims (6)

1. a spur gear wheel cold extrusion die comprises the mould bases that is made up of die shoe (21), upper bolster (22), lead (25), wherein:
Upper bolster (22) is fixed on the lead (25), has the hole of matching with lead (25) on the die shoe (21), and lead (25) passes this Kong Houyu die shoe (21) movingly;
Perhaps die shoe (21) is fixed on the lead (25), has the hole of matching with lead (25) on the upper bolster (22), and lead (25) passes this Kong Houyu upper bolster (22) movingly;
It is characterized in that:
Through bolt annular die cavity (2) is arranged below the upper bolster (22); Heelpiece is housed in the annular die cavity (2) from top to bottom successively; Seaming chuck fixed cover (6); Interference fit has seaming chuck (7) in the seaming chuck fixed cover (6), seaming chuck binding ring (8) is housed below the seaming chuck fixed cover (6), and seaming chuck binding ring (8) is fixed on the annular die cavity (2) through screw (4);
Through bolt lower mode cavity (13) is arranged above the die shoe (21), cushion block, die circle (16) are housed in the lower mode cavity (13) from bottom to top successively; Be loaded on the push-down head fixed cover (15) in the die circle (16), the push-down head (11) of interference fit in push-down head fixed cover (15), the centre has the tooth mould (14) of die cavity; Lower cavity die (9); Interference fit has fairlead (10) in the lower cavity die (9), and lower gasket (12) is housed above the lower cavity die (9), and lower gasket (12) is through being bolted on the lower mode cavity (13);
Seaming chuck (7) is positioned on the same axis with push-down head (11);
Push-down head (11) top is arranged in the die cavity of tooth mould (14);
Die shoe (21) bottom has axis hole, and cushion block, push-down head fixed cover have the crescent moon hole on (15), has a crescent push rod (19) to pass the axis hole of die shoe (21) bottom, stretches in the die cavity of tooth mould (14) after passing the crescent moon hole again.
2. spur gear wheel cold extrusion die according to claim 1 is characterized in that: heelpiece comprises heelpiece (1), goes up middle pad (3), middle pad retainer ring (5), and pad (3) is sleeved in the middle pad retainer ring (5) in going up.
3. spur gear wheel cold extrusion die according to claim 1 is characterized in that: cushion block comprises cushion block (17) on die lower cushion block (18) and the die, and cushion block (17) is loaded in the die circle (16) on the die.
4. spur gear wheel cold extrusion die according to claim 1 is characterized in that: between cushion block and die shoe (21), lower mode cavity retainer ring (23) is housed, lower mode cavity retainer ring (23) and lower mode cavity (13) interference fit.
5. spur gear wheel cold extrusion die according to claim 1 is characterized in that: tooth mould (14) is made up of the hard-metal insert mould (28) of cover (23) and internal layer in the tooth mould of outer field tooth mould overcoat (26), centre.
6. spur gear wheel cold extrusion die according to claim 2 is characterized in that: go up heelpiece (1) and annular die cavity (2) interference fit, middle pad retainer ring (5) and last middle pad (3) interference fit.
CN2012100591591A 2012-03-07 2012-03-07 Cold extrusion die for spur gear Pending CN102601146A (en)

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CN102794327A (en) * 2012-08-23 2012-11-28 湖南天雁机械有限责任公司 Mold for extrusion forming of engine valve rotating mechanism base
CN104492951A (en) * 2014-12-03 2015-04-08 柳州通为机械有限公司 Reinforcement drawing die device

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《热加工工艺》 20070915 伍太宾、王屹 "微型轿车换挡齿轮轴的冷挤压成形技术研究" 49-51页 2、6 第36卷, 第17期 *
《锻压装备与制造技术》 20040630 张水忠、徐新成 "齿环内孔的冷挤压成形" 44-45页 1-6 , 第3期 *
伍太宾、王屹: ""微型轿车换挡齿轮轴的冷挤压成形技术研究"", 《热加工工艺》 *
张水忠、徐新成: ""齿环内孔的冷挤压成形"", 《锻压装备与制造技术》 *
王强等: ""圆柱直齿轮挤压组合凹模的优化设计"", 《合肥工业大学学报》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102773300A (en) * 2012-08-22 2012-11-14 太仓久信精密模具有限公司 Rigid alloy cold extrusion die with irregular cavity
CN102794327A (en) * 2012-08-23 2012-11-28 湖南天雁机械有限责任公司 Mold for extrusion forming of engine valve rotating mechanism base
CN102794327B (en) * 2012-08-23 2016-06-29 湖南天雁机械有限责任公司 Engine valve rotating mechanism base extrusion forming mold
CN104492951A (en) * 2014-12-03 2015-04-08 柳州通为机械有限公司 Reinforcement drawing die device

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Application publication date: 20120725