CN104368618A

CN104368618A - Cold extrusion die suitable for extrusion molding of hexagonal bolt in track end coupling

Info

Publication number: CN104368618A
Application number: CN201410505032.7A
Authority: CN
Inventors: 李宏伟; 路香兰; 叶明�; 肖黎明; 毕泗元; 李继风; 庞金录; 蔡晓青; 张卫华; 陈东红; 郭波; 陈利华; 王亮; 韩顺才
Original assignee: Beijing North Vehicle Group Corp
Current assignee: Beijing North Vehicle Group Corp
Priority date: 2014-09-26
Filing date: 2014-09-26
Publication date: 2015-02-25

Abstract

The invention discloses a cold extrusion die suitable for extrusion molding of a hexagonal bolt in a track end coupling. The die includes an upper die group and a lower die group, wherein the upper die group includes an upper die plate, a male die arranged on the upper die plate, a male die jacket jacketed outside the male die, and a fixing plate for fixing the male die jacket on the upper die plate; and the lower die group comprises a lower die plate, a female die arranged on the lower die plate, an external fastening ring jacketed outside the female die, a press plate for fixing the external fastening ring on the lower die plate, a cushion block arranged between female die and the lower die plate, a push block arranged in the cavity of the cushion block, and a push rod traversing through the lower die plate. The die adopts a general die frame, so only the male die, the female die and other key parts are exchanged to be used universally, thereby the making cost of the die is reduced, and the utilization rate of the die is improved; and the female die and the external fastening ring form a multilayer pre-stress combined structure, so transverse and vertical cracks generated in the extrusion process of the female die are effectively prevented.

Description

Be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded

Technical field

The present invention relates to a kind of mould, be specifically related to a kind ofly be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded, belong to field of mechanical technique.

Background technology

At present, based on the manufacture method mainly machining of six square bolts in high strength alloy steel crawler belt connector.Machining is by blanking → face work → centering → turning → cut-out → boring → face work → car profile → cutting thread → draw hexagonal hole → repair the manufacture that the operations such as burr realize six square bolts in crawler belt connector.There is manufacturing cycle length in the method, manufacture efficiency is low, manufacturing cost is high, waste of raw materials is serious, the high deficiency of hand labor intensity, and be difficult to the batch micro operations realizing interior six square bolts.

In order to realize the batch micro operations of interior six square bolts, in crawler belt connector, six square bolt extrusion forming process arise at the historic moment.

Summary of the invention

The object of the present invention is to provide a kind of low cost of manufacture, utilization rate high, durable, be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded.

In order to realize above-mentioned target, the present invention adopts following technical scheme:

Be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded, comprise: upper module and lower module, is characterized in that,

Aforementioned upper module comprises: cope match-plate pattern, is arranged on the punch on aforementioned cope match-plate pattern, is enclosed within the punch overcoat of aforementioned punch outside, and aforementioned punch overcoat is fixed on the fixed head on aforementioned cope match-plate pattern; Aforementioned fixed head is fixedly mounted by screw and cope match-plate pattern, and aforementioned punch is hexagonal cylindricality and punch overcoat is stretched out in lower end;

Aforementioned lower module comprises: lower bolster, be arranged on the die on aforementioned lower bolster, be enclosed within the outer tight loop of aforementioned die outside, aforementioned outer tight loop is fixed on the pressing plate on lower bolster, pad is between aforementioned die and lower bolster and have the cushion block of cavity, be arranged on the pushing block in the cavity of aforementioned cushion block, and through aforementioned lower bolster for ejecting the push rod of aforementioned pushing block; Aforementioned platens is fixedly mounted by screw and lower bolster, and aforementioned die has the die cavity adapted with the profile of interior six square bolts.

Aforesaid cold extrusion die, is characterized in that, adopts the tapering of 2 °-3 ° to cold pressing and join between aforementioned die and outer tight loop, and being press-fitted the magnitude of interference is 0.25mm-0.30mm.

Aforesaid cold extrusion die, is characterized in that, aforementioned die adopts high speed steel W 6M05Cr4V2 to make.

Aforesaid cold extrusion die, is characterized in that, aforementioned punch adopts high speed steel W 6M05Cr4V2 to make.

Aforesaid cold extrusion die, is characterized in that, aforementioned cope match-plate pattern is provided with guide pin bushing, and aforementioned lower bolster is provided with guide pillar, and upper module and lower module realize leading by aforementioned guide pillars and bushes.

Usefulness of the present invention is:

1, mould have employed universal die set, only need exchange the vital parts such as punch, die, cushion block, pushing block, push rod and just can do mutually general, both reduce die manufacturing cost, turn improved the utilization rate of mould;

2, die and outer tight loop form multilayer prestressing combination formula structure, can effectively prevent die from extrusion process, producing horizontal and vertical crackle;

3, die and punch adopt high speed steel W 6M05Cr4V2 to make, this material carbide particle is tiny, distribution uniform, when its heat treatment hardness reaches about 60HRC, not only has high strength, high rigidity and high-wearing feature, also there is good toughness, cold extrusion shaped needs can be met.

Accompanying drawing explanation

Fig. 1 is the structural representation of cold extrusion die of the present invention.

The implication of Reference numeral in figure:

1-cope match-plate pattern, 2-guide pin bushing, 3-guide pillar, 4-screw, 5-punch overcoat cushion block, 6-punch, 7-fixed head, 8-lower bolster, 9-screw, 10-blank, 11-cushion block, 12-pushing block, 13-push rod, 14-die, the outer tight loop of 15-, 16-pressing plate.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.

Of the present inventionly be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded, comprise: upper module and lower module.Introduce the structure of upper module and lower module below respectively.

With reference to Fig. 1, upper module comprises: cope match-plate pattern 1, punch 6, punch overcoat 5 and fixed head 7, wherein, punch overcoat 5 is enclosed within the outside of punch 6, punch overcoat 5 is stretched out in the lower end of punch 6, punch overcoat 5 is fixed on cope match-plate pattern 1 by fixed head 7, and fixed head 7 is fixedly mounted by screw 4 and cope match-plate pattern 1; Punch 6 is hexagonal cylindricality, hexagonal structure in blank 10 is formed after the punching press of punch 6.

With reference to Fig. 1, lower module comprises: lower bolster 8, die 14, outer tight loop 15, pressing plate 16, cushion block 11, pushing block 12 and push rod 13, wherein, die 14 and outer tight loop 15 are all arranged on lower bolster 8, and outer tight loop 15 is enclosed within the outside of die 14, the two forms multilayer prestressing combination formula structure, and die 14 has the die cavity adapted with the profile of interior six square bolts; Pressing plate 16 is used for outer tight loop 15 to be fixed on lower bolster 8, and pressing plate 16 is fixedly mounted by screw 9 and lower bolster 8; Cushion block 11 pads between die 14 and lower bolster 8, and cushion block 11 has cavity, and pushing block 12 is arranged in the cavity of cushion block 11, push rod 13 is positioned at the below of pushing block 12, push rod 13 passes lower bolster 8 and connects with the sliding accessory of lower bolster 8, and workpiece for ejecting pushing block 12, thus is ejected die 14 by push rod 13.

Mould of the present invention have employed universal die set, only need exchange the vital parts such as punch 6, die 14, cushion block 11, pushing block 12, push rod 13 and just can do mutually general, both reduce die manufacturing cost, turn improved the utilization rate of mould.

In the present invention, adopt tapering to cold pressing and join between die 14 and outer tight loop 15, form multilayer prestressing combination formula structure, this kind of structure can effectively prevent die from extrusion process, producing horizontal and vertical crackle.

As the preferred scheme of one, adopt the tapering of 2 °-3 ° to cold pressing and join between die 14 and outer tight loop 15, being press-fitted the magnitude of interference is 0.25mm-0.30mm.

As the preferred scheme of one, die 14 and punch 6 adopt high speed steel W 6M05Cr4V2 to make.This material carbide particle is tiny, distribution uniform, when its heat treatment hardness reaches about 60HRC, not only has high strength, high rigidity and high-wearing feature, also has good toughness, can meet cold extrusion shaped needs.

In the present invention, in order to ensure mould accuracy of alignment, upper module and lower module realize leading by guide pillar guide pin bushing.Concrete, cope match-plate pattern 1 arranges guide pin bushing 2, lower bolster 8 arranges guide pillar 3, guide pin bushing 2 is enclosed within the outside of guide pillar 3, and sliding accessory connects therebetween, and guide pillar 3 and guide pin bushing 2 cooperatively interact and achieve the precise alignment of module and lower module.

It should be noted that, above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.

Claims

1. be applicable to the cold extrusion die that in crawler belt connector, six square bolts are extruded, comprise: upper module and lower module, is characterized in that,

Described upper module comprises: cope match-plate pattern (1), be arranged on the punch (6) on described cope match-plate pattern (1), be enclosed within the punch overcoat (5) that described punch (6) is outside, and described punch overcoat (5) be fixed on the fixed head (7) on described cope match-plate pattern (1); Described fixed head (7) is fixedly mounted by screw (4) and cope match-plate pattern (1), and described punch (6) is in hexagonal cylindricality and punch overcoat (5) is stretched out in lower end;

Described lower module comprises: lower bolster (8), be arranged on the die (14) on described lower bolster (8), be enclosed within the outer tight loop (15) that described die (14) is outside, described outer tight loop (15) is fixed on the pressing plate (16) on lower bolster (8), pad is between described die (14) and lower bolster (8) and have the cushion block (11) of cavity, be arranged on the pushing block (12) in the cavity of described cushion block (11), and through described lower bolster (8) for ejecting the push rod (13) of described pushing block (12), described pressing plate (16) is fixedly mounted by screw (9) and lower bolster (8), and described die (14) has the die cavity adapted with the profile of interior six square bolts.

2. cold extrusion die according to claim 1, is characterized in that, adopts the tapering of 2 °-3 ° to cold pressing and join between described die (14) and outer tight loop (15), and being press-fitted the magnitude of interference is 0.25mm-0.30mm.

3. cold extrusion die according to claim 2, is characterized in that, described die (14) adopts high speed steel W 6M05Cr4V2 to make.

4. cold extrusion die according to claim 3, is characterized in that, described punch (6) adopts high speed steel W 6M05Cr4V2 to make.

5. cold extrusion die according to claim 1, it is characterized in that, described cope match-plate pattern (1) is provided with guide pin bushing (2), described lower bolster (8) is provided with guide pillar (3), upper module and lower module realize leading by described guide pillar (3) and guide pin bushing (2).