CN201211548Y

CN201211548Y - Forging mould of motor vehicle rear-wheel spindle

Info

Publication number: CN201211548Y
Application number: CNU2008200397321U
Authority: CN
Inventors: 朱德嵩; 于丰; 张家全; 张进
Original assignee: NANJING AUTOMOBILE FORGING CO Ltd
Current assignee: NANJING AUTOMOBILE FORGING CO Ltd; Nanjing Automobile Group Corp
Priority date: 2008-06-25
Filing date: 2008-06-25
Publication date: 2009-03-25
Anticipated expiration: 2018-06-25

Abstract

The utility model relates to an improved hot forging die, in particular to a forging die for a rear axle of a motor vehicle. The forging die consists of an upper die and a lower die, wherein a male die area is arranged on the upper die at a flange of a forging piece; and a female die area in fit with the male die area on the upper die is arranged on the lower die corresponding to the male die area on the upper die; and the upper die is provided with a vent at a thin rib of the forging piece. The improved hot forging die has the advantages that the die has lower requirement on the precision of a blank; the forging part is fully filled, with few longitudinal burrs produced; the equipment is not easy to be overloaded; the stress peak of the inner surface of a die cavity is effectively reduced; the die is not easy to wear and crack so as to prolong the service life; the utilization rate of materials is improved over 15 percent than the prior forging mode.

Description

Rear wheels of motor-vehicles axle forging mold

Technical field

The utility model relates to a kind of improvement of hot forging mould, especially a kind of rear wheels of motor-vehicles axle forging mold.

Background technology

The forging and molding process can be divided into open die forging, impressing forging and closed die forging according to the closed state of mold cavity.Blank unnecessary in the open die forging, impressing forging process is extruded by bridge portion gap, forms overlap, and the resistance of bridge portion generation simultaneously makes blank be full of die cavity.Blank does not have blank to extrude die cavity at the die cavity internal shaping of complete closed during closed die forging, belongs to non-trimming and forges.Closed die forging has the forging of thin muscle, branch, acute angle than the easier formation of open die forging, impressing forging generally speaking, and can save raw material, and as the hind axle of motor vehicle, but that its shortcoming is dimensional requirement height, a die cavity stressing conditions to blank is relatively poor, and mould lost efficacy fast.The hind axle of motor vehicle adopts open die forging, impressing forging more, but in actual forging process, because its forging and molding is difficult, the situation that forging is not fully filled is more, and stock utilization is no more than 73%; The rear wheels of motor-vehicles axle that also has adopts closed die forging, and this mode improves the requirement of cutting stock precision, the corresponding increase of cost, and the very fast appearance wearing and tearing of mould, crack performance in the actual production, forging easily produces vertical burr.All there is shortcoming in these two kinds of die forging modes, therefore press for a kind of rear wheels of motor-vehicles axle forging mold that can save raw material, long service life.

The utility model content

The purpose of this utility model is to provide a kind of improved rear wheels of motor-vehicles axle forging mold for the above-mentioned shortcoming that solves prior art.

The purpose of this utility model is achieved through the following technical solutions:

Rear wheels of motor-vehicles axle forging mold is made up of upper die and lower die, and the flange place that is positioned at forging at described patrix is provided with the punch zone; On described counterdie, be provided with the die region that matches with patrix punch zone corresponding to patrix punch location; The thin rib place that is positioned at forging at described patrix has passage.

The purpose of this utility model can also realize by following technical measures:

Aforesaid rear wheels of motor-vehicles axle forging mold, the fit clearance between the male and female face between wherein said punch zone and the die region is 0.1～0.8mm.

Aforesaid rear wheels of motor-vehicles axle forging mold, the outside that described therein patrix is positioned at forging branch is provided with the last die face of level, the die face place is provided with the lower die face of level on described counterdie correspondence, and last die face and lower die face constitute a bridge portion structure, and the gap of bridge portion structure is 1～4mm.

The beneficial effects of the utility model are not high to the required precision of blank, and forging can be full of mold cavity fully, seldom produces vertical burr, equipment is difficult for overload, reduced the peak stress of die cavity inner surface effectively, die wear, be full of cracks speed are slowed down, and have improved the life-span.The comparable existing forging mode of the utilization rate of material improves more than 15%.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 (a) is certain model hind axle forging front view, and Fig. 1 (b) is its left view, and Fig. 1 (c) is that the A-A of Fig. 1 (a) is to cutaway view.

Fig. 2 is the utility model structural representation.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 be among Fig. 3 A-A to B-B to cutaway view.

The specific embodiment

Embodiment one

Present embodiment is an arbor wheel forging mold behind a kind of motor vehicle, structure such as Fig. 1, Fig. 2 and shown in Figure 3, form by patrix 1 and counterdie 2, flange 6 places that are positioned at forging on the patrix 1 are provided with the punch zone, promptly from the C point of mold cavity in the zone that D point, E point are ordered to F, exceeding the die cavity of going up die face 4 on the patrix 1 partly becomes the punch zone, and corresponding punch location becomes die region on the counterdie 2, and patrix 1 is provided with passage 3 at the thin rib place of forging.Punch zone and die region are mated condition when mould is closed, the fit clearance 8 between its male and female face is shown in the B-B section of Fig. 4, between 0.1～0.8mm.The outside that is positioned at forging branch 7 on the patrix 1 is provided with the last die face 4 of level, and corresponding upward die face 4 places are provided with the lower die face 5 of level on the counterdie 2.Is bridge portion structure through the G point to the zone that F is ordered from the C point of mold cavity, and this structure is made of last die face 4 and lower die face 5, and bridge portion gap 9 is shown between 1～4mm as the A-A section of Fig. 4.

In the forging and molding process, blank is inserted in the die cavity of counterdie 2, patrix 1 is with the slide block down of forcing press, blank begins compressive deformation, when blank touches the die region sidewall of counterdie 2, the punch zone of patrix 1 cooperates with die region, provides reasonable resistance to stop the blank outflow, impels blank to flow to positions such as the dark chamber of mould, branch.The continuation of patrix 1 is descending, forces the shank of blank to hind axle, flank and the place's filling of far-end G point, and this moment, the flank die cavity had passage 3 to be in communication with the outside, and air is discharged when blank filling die cavity smoothly, had reduced the blank flow resistance.In the final stage that is shaped, flank, the shank of forging are full of, and the mold cavity internal pressure sharply raises, and bridge portion gap begins to discharge unnecessary blank, form overlap.When patrix 1 and counterdie 2 complete closures, the mold cavity internal pressure rises to the highest, because the fit clearance 8 in punch-die zone is far smaller than the bridge portion gap 9 of mold cavity open area, forging does not have vertical burr to produce, because have overlap to form, the maximum pressure in the die cavity is littler than closed die forging technology completely.

The utility model can also use on hotdie forging press, friction press.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the protection domain of the utility model requirement.

Claims

1. rear wheels of motor-vehicles axle forging mold is made up of upper die and lower die, it is characterized in that: the flange place that is positioned at forging at described patrix is provided with the punch zone; On described counterdie, be provided with the die region that matches with patrix punch zone corresponding to patrix punch location; The thin rib place that is positioned at forging at described patrix has passage.

2. according to the described rear wheels of motor-vehicles axle of claim 1 forging mold, it is characterized in that: the fit clearance between the male and female face between described punch zone and the die region is 0.1～0.8mm.

3. according to the described rear wheels of motor-vehicles axle of claim 1 forging mold, it is characterized in that: the outside that described patrix is positioned at forging branch be provided with level on die face, the die face place is provided with the lower die face of level on described counterdie correspondence, last die face and lower die face constitute a bridge portion structure, and the gap of bridge portion structure is 1～4mm.