CN201855910U

CN201855910U - Full car knuckle semi-closed extrusion die

Info

Publication number: CN201855910U
Application number: CN2010205672021U
Authority: CN
Inventors: 李路
Original assignee: Southwest University
Current assignee: Southwest University
Priority date: 2010-10-19
Filing date: 2010-10-19
Publication date: 2011-06-08
Anticipated expiration: 2020-10-19

Abstract

The utility model provides a full car knuckle semi-closed extrusion die, which is suitable for an extrusion-die forging composite manufacturing process of a full car knuckle. The full car knuckle semi-closed extrusion die comprises an upper die and a lower die; the upper die and the lower die are jointly encircled to form a die cavity; the step plane of a flange plate of the lower die and the outer side of a bridge part below the step plane are provided with resistance walls; the lower die is provided with the bridge part being higher than the step plane of the flange plate near one side of the step plane of the flange plate; and the bridge part outwards extends to the side wall of the lower die. After being assembled, the upper die and the lower die do not form a fully-closed cavity; on one hand, the structure can ensure areas which need to be filled by more materials still have enough lateral resistance like a fork-shaped butt end, a rod and the like, and simultaneously can also ensure the pressure in the cavity not too high. Integrated loads like force, heat and the like in the cavity can be dissipated outside along the bridge part in manner of flash outflow after exceeding certain limits, thereby ensuring that the extrusion die cannot become poor under the load condition and the service life of the extrusion die can be effectively prolonged.

Description

The semiclosed extrusion die of loaded vehicle knuckle

Technical field

The utility model relates to a kind of forging mold of mechanical part, relates in particular to a kind of mould of making the heavy-duty car knuckle.

Background technology

Knuckle is the part on the automobile front axle assembly, also be crucial security personnel's parts on the automobile, be safety member, it is the supported cart body weight both, transmit steering moment again and bear front-wheel skidding moment, therefore its mechanical performance and shape and structure are required very strictness, the product design complexity, manufacture difficulty is big.In traditional forging production technique, change vertically acutely in order to solve the forging cross section, the difficulty that the distribution of material otherness is big adopts dead man usually, splits and expect that rear vertical type (the blank axis is vertical with die joint) machine is forged or the process route of horizontal (blank is axially parallel with die joint) hammering carries out production.But above technology has forging precision and stock utilization is low, the product streamline turbulence, labor strength height, the problem that production efficiency is low.In recent years, the no-draft forging composite manufacturing technology of heavy-duty car knuckle has obtained promotion and application widely, and therefore, this technology efficiently solves the problems that traditional handicraft exists.But in this technology,,, cause sealing generation HTHP in the die cavity, the life-span of seriously having reduced extrusion die because the extrusion die that adopts forms the die cavity of complete closed after the upper and lower mould matched moulds especially in the extrusion modling stage.The die life weak point has become one of this advanced technologies scale application and has hindered greatly.Mostly prolong die life as far as possible by purchasing better mould steel and being aided with surface reinforcing method in the industry, this has increased production cost and mould manufacturing cycle greatly.

At above-mentioned deficiency, a kind of new structure of extrusion of necessary proposition prolongs the mould service life as much as possible when guaranteeing enough good filling capacity, to give full play to the use potentiality of common die steel, reduce cost.

Summary of the invention

The purpose of this utility model provides the semiclosed extrusion die of a kind of loaded vehicle knuckle, can guarantee to obtain significantly improving of die life when product is filled forming effect.

The purpose of this utility model is achieved through the following technical solutions: the semiclosed extrusion die of a kind of loaded vehicle knuckle, comprise upper die and lower die, upper die and lower die surround die cavity jointly, the ring flange cascaded surface of described counterdie and following bridge portion arranged outside thereof have the resistance wall, be provided with the bridge portion that is higher than the ring flange cascaded surface near ring flange cascaded surface one side on the counterdie, bridge portion extends out to the counterdie sidewall.

Further, described bridge portion height t is: 4 mm≤t≤6 mm, and the width b of wall propons portion is: 10 mm≤b≤15 mm; The gradient a of resistance wall is: 0＜a≤pattern draft; During matched moulds resistance within the walls the gap n of side be: 2 mm≤n≤4 mm; Resistance wall height h is: 40 mm≤h≤50 mm;

Further, the die joint of a relative side with the ring flange cascaded surface is provided with guiding projection 6 on the described counterdie, and correspondence is provided with gathering sill on the patrix 1;

Further, the height 40 mm≤h of guiding projection ₁≤ 60 mm; The gradient a of faying face between guiding projection and the gathering sill ₁For: 1 °≤a ₁≤ 3 °; The working clearance n of faying face between guiding projection and the gathering sill ₁For: 0.3 mm≤n ₁≤ 0.5 mm;

Further, the bar portion die cavity of described counterdie extends to form through-hole structure downwards;

Further, described patrix drift is a semielliptical shape.

The beneficial effects of the utility model: the semiclosed extrusion die of loaded vehicle knuckle of the present utility model, compare existing extrusion die, upper and lower mould does not constitute near closed hollow ring completely behind the matched moulds, but the resistance wall is arranged at counterdie flange cascaded surface and following bridge portion arranged outside thereof, be provided with the bridge portion that is higher than the ring flange cascaded surface near ring flange cascaded surface one side on the counterdie, bridge portion extends out to the counterdie sidewall and constitutes local open semi-closed structure.This structure can guarantee that on the one hand still there are enough lateral resistances in the zone that the more material of needs such as fork-shaped major part and bar portion is filled, can guarantee that also the die cavity pressure inside is unlikely to excessive simultaneously.After integrated loads such as the power in the die cavity, heat surpass certain limit, can outwards dissipate with the form of overlap outflow along bridge portion, thereby the loading condition that has guaranteed extrusion die is unlikely to become badly, has effectively prolonged the service life of mould.Simultaneously guiding projection is set, can prevents the mould destructive failure in the mould huge offsetting power that active balance step portion mould causes when accurately guiding prevents to offset at flange cascaded surface offside.In addition, the patrix drift is set to semielliptical shape can effectively reduces extrusion load when guaranteeing local strength.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples:

Fig. 1 is the stereogram of the utility model counterdie;

Fig. 2 is the vertical view of the utility model counterdie;

Fig. 3 be behind the matched moulds among Fig. 2 A-A scheme to stagewise cutaway view (rotation);

Fig. 4 be among Fig. 2 B-B to cutaway view;

Fig. 5 is an A portion enlarged drawing among Fig. 3.

The specific embodiment

Fig. 1 is the stereogram of the utility model counterdie; Fig. 2 is the vertical view of the utility model counterdie; Fig. 3 is that A-A schemes to stagewise cutaway view (rotation) among Fig. 2; Fig. 4 be among Fig. 2 B-B to cutaway view; Fig. 5 is an A portion enlarged drawing among Fig. 3.As shown in the figure, the semiclosed extrusion die of loaded vehicle knuckle of the present utility model, comprise patrix 1 and counterdie 2, patrix 1 and counterdie 2 surround die cavity 3 jointly, the ring flange cascaded surface of described counterdie 2 and following bridge portion arranged outside thereof have resistance wall 4, be provided with the bridge portion 5 that is higher than the ring flange cascaded surface near ring flange cascaded surface one side on the counterdie 2, bridge portion 5 extends out to the counterdie sidewall.Owing to the resistance wall is not set more than the ring flange cascaded surface, constitutes local open semi-closed structure and extended type bridge portion is set and extends to mould side wall.Enter concave die cavity fully with drift in traditional Closed Extrusion mould, constituting enclosure space has remarkable difference.This set can impel the filling of big fork-shaped head and bar portion in the strong Resistance Level of mould local structure, can guarantee that again the die cavity pressure inside is unlikely to excessive.After integrated loads such as the power in the die cavity, heat surpass certain limit, can outside extrusion system, dissipate with the form of overlap outflow, thereby the loading condition that has guaranteed extrusion die is unlikely to become badly, has effectively prolonged the service life of mould.

In the present embodiment, described bridge portion 5 height t are: 4 mm≤t≤6 mm, and the width b of wall propons portion is: 10 mm≤b≤15 mm; The gradient a of resistance wall 4 is: 0＜a≤pattern draft; The gap n of resistance wall 4 medial surfaces is during matched moulds: 2 mm≤n≤4 mm; Resistance wall 4 height h are: 40 mm≤h≤50 mm.To make MAN series loaded vehicle knuckle is example, concrete value is: bridge portion 5 height t are got 5 mm, the width b of wall propons portion gets 10 mm, resistance wall 4 gradient a get 5 °, the gap n of resistance wall 4 medial surfaces gets 2.5 mm during matched moulds, and resistance wall height h can obtain filling capacity and the balance of die life preferably when getting 45 mm.

In the present embodiment, the die joint of a relative side with the ring flange cascaded surface is provided with guiding projection 6 on the described counterdie, and correspondence is provided with gathering sill on the patrix 1.The setting of this guiding mechanism its role is to: but on the one hand during the balance extruding because the huge sidesway power that product step portion mould causes prevents that mould from the problem of premature failure such as fracture taking place, and effectively improves die life under excessive lateral forces; Can play the effect of accurate guiding on the other hand, overcome the problem that no guider on the general forging equipment causes final knuckle forging mismatch.

In the present embodiment, the height 40 mm≤h of guiding projection 6 ₁≤ 60 mm; The gradient a of faying face between guiding projection and the gathering sill ₁For: 1 °≤a ₁≤ 3 °; The working clearance n of faying face between guiding projection and the gathering sill ₁For: 0.3 mm≤n ₁≤ 0.5 mm.But concrete value is: the height of guiding projection 6 is 45 mm, wide 95 mm, and length is the counterdie width, the gradient a of faying face between guiding projection and the gathering sill ₁Be 3 °, the working clearance n of faying face between guiding projection and the gathering sill ₁Be 0.3 mm.Concrete size also can suitably be determined in above-mentioned scope after to the cascaded surface strength check in conjunction with product ring flange cascaded surface height when practical application.

In the present embodiment, the bar portion die cavity 7 of described counterdie 2 extends to form through-hole structure downwards.The advantage of this through-hole structure is: the first, be convenient to be pressed in the extrusion process gas discharge of die cavity, avoided conventional extrusion dies partial closure to form the high pressure district, cause material to fill the problem of difficulty to bar portion die cavity depths.The second, the discharge of the oxide skin of being convenient to form in the extrusion process, the lubricated and impurity particle that cooling fluid forms has been avoided above impurity to be pressed into the forging body and has been formed folding and hinder or fall into closed rod portion cavity bottom and be unfavorable for the problem of clearing up.

In the present embodiment, described patrix drift 8 is a semielliptical shape.Patrix drift 10 is under the prerequisite that guarantees manufacturability and intensity, and property at parts of edges and corners is with orthodrome and big chamfered transition, and the reduction effect of shaping load was remarkable when the drift of this shape was shaped to similar knuckle backward and forward extrusion.Adopt the semiclosed extrusion die of loaded vehicle knuckle described in the utility model can when guaranteeing knuckle product filling effect, obtain effective lifting in extrusion die life-span.According to statistics, it is about 45% that extrusion die on average increases the longevity, and beneficial effect is very remarkable.

Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. semiclosed extrusion die of loaded vehicle knuckle, comprise patrix (1) and counterdie (2), patrix (1) and counterdie (2) surround die cavity (3) jointly, it is characterized in that: the ring flange cascaded surface of described counterdie (2) and following bridge portion arranged outside thereof have resistance wall (4), counterdie (2) is gone up near ring flange cascaded surface one side and is provided with the bridge portion (5) that is higher than the ring flange cascaded surface, and bridge portion (5) extends out to the counterdie sidewall.

2. the semiclosed extrusion die of loaded vehicle knuckle according to claim 1 is characterized in that: described bridge portion (5) height t is: 4 mm≤t≤6 mm, and the width b of wall propons portion is: 10 mm≤b≤15 mm; The gradient a of resistance wall (4) is: 0＜a≤pattern draft; The gap n of resistance wall (4) medial surface is during matched moulds: 2 mm≤n≤4 mm; Resistance wall (4) height h is: 40 mm≤h≤50 mm.

3. the semiclosed extrusion die of loaded vehicle knuckle according to claim 2 is characterized in that: the die joint of a relative side with the ring flange cascaded surface is provided with guiding projection (6) on the described counterdie, and patrix (1) is gone up correspondence and is provided with gathering sill.

4. the semiclosed extrusion die of loaded vehicle knuckle according to claim 3 is characterized in that: the height 40 mm≤h of guiding projection (6) ₁≤ 60 mm; The gradient a of faying face between guiding projection and the gathering sill ₁For: 1 °≤a ₁≤ 3 °; The working clearance n of faying face between guiding projection and the gathering sill ₁For: 0.3 mm≤n ₁≤ 0.5 mm.

5. the semiclosed extrusion die of loaded vehicle knuckle according to claim 4 is characterized in that: the bar portion die cavity (7) of described counterdie (2) extends to form through-hole structure downwards.

6. the semiclosed extrusion die of loaded vehicle knuckle according to claim 5 is characterized in that: described patrix drift (8) is a semielliptical shape.