CN1616161A

CN1616161A - Method for producing non-cast integrally formed antomobile driving axle shell

Info

Publication number: CN1616161A
Application number: CN 200310110535
Authority: CN
Inventors: 周双喜
Original assignee: XINKAI INDUSTRY Co Ltd HENGYANG
Current assignee: XINKAI INDUSTRY Co Ltd HENGYANG
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2005-05-18

Abstract

The production process of non-cast integrally formed automobile driving axle shell includes pressing one pipe blank in hydraulic press into pipe blank with large middle part and small end parts; pressing into rectangular pipe and cutting long technological through hole in the middle part along the axial central line; heating and extruding the technological hole into circular hole in the required size; and finally finishing. The present invention performs local machining of the steel pipe material only, and realizes the manufacture of no-seam driving axle shell. The manufactured driving axle shell has high technological performance and light weight, and the present invention has the features of high material utilization, low power consumption and high machining efficiency.

Description

The manufacture method of not cast integrally formed automobile transaxle housing

Technical field

The present invention relates to the manufacture method of the manufacture method of automobile transaxle housing, particularly not cast integrally formed automobile transaxle housing.

Background technology

Driving axle housing is one of major part of automobile, and it is the main component parts of transmission system, is again the main component parts of running device, and driving axle housing is mainly main with being support and protection main reduction gear, diff and semiaxis etc. in transmission system; In running device, the main effect of driving axle housing is that the relative axial position of driving wheels is fixed, with driven bridge one over-expense support vehicle frame and on each assembly quality.Simultaneously, when running car, bear road surface reaction and moment that right wheel transmits, and pass to vehicle frame through the suspension body, therefore, driving axle housing should have enough intensity and rigidity, the total cost of driving axle housing accounts for 1/6～1/5 of drive axle assembly, therefore the appropriate design of axle housing and economic the manufacturing to guaranteeing drive axle performance and cost-cutting, have the crucial meaning.

At present, the forming method of vehicle driving axle housing mainly contains casting and punching press-welding fabrication.Casting bridge shell is to cast the intermediate hollow frame with ductile castiron, the steel axle tube that install in order to hub bearing to be installed at two ends constitutes whole drive axle axle housing body, though this axle housing body has can be made into complex-shaped and desirable, variable wall thicknessization, the advantage that rigidity, intensity are all bigger, but it is big to exist weight, it is big to take material, power consumption, equipment investment, shortcomings such as the more and complexity of the high wayward and follow-up machining amount of foundry technique difficulty, casting bridge shell belongs to first generation axle housing product; Punching press-welding fabrication is to utilize two block plates to strike out the relative welding of upper and lower two halves axle housing body main part to make needed axle housing.At present in auto trade in the highest flight, applied widely, punching press-welding fabrication axle housing belongs to second generation axle housing product.But the axle housing body main part that this manufacturing process obtained is difficult to accurately coincide, and need finishing before the welding, and weld seam is long, the welding job amount is big, to welding requirements for quality height, otherwise is difficult to guarantee the housing quality, influence its technical performance, and this manufacture method stock utilization is low.

For shortening weld seam, simplify technology, authorization number discloses a kind of " expanding and contracting forming technology of integrated type bridge casing of automobile " for the CN1019280B Chinese patent, this technological process be with the axial plane of symmetry of axle housing serve as the combination benchmark, choose that the suitable length solid drawn pipe one end draw, the other end are inserted excision technology stub bar behind the glue mold piece pressurization dilatating and deformable, flattened, behind the rabbet, shaping, normalizing treatment, make with second half relative welding of half-bridge housing of making again with same process.Though this manufacture method improves to some extent than said method, still there is weld seam in the axle housing of producing, and not only welding can influence the axle housing dimensional accuracy, and the welding quality requirement is high, and manufacturing process is still complicated, the cost height.In addition, realize expand tube, must cause the tube wall attenuation that dilates crushed element, also influence the technical performance of axle housing, and repeatedly pipe is repaired in cutting, stock utilization is reduced with extruding glue mold piece.

Summary of the invention

The manufacture method that the purpose of this invention is to provide a kind of not cast integrally formed automobile transaxle housing, with the driving axle housing body technique dependable performance that this method is produced, operation is few, the stock utilization height.

The objective of the invention is to have following steps to realize:

1, blanking: select the solid drawn pipe of certain diameter, thickness for use, cut the pipe blanking by axle housing length and technological parameter and form needed pipe;

2, undergauge: on hydraulic compressor, pipe is pressed into broad in the middle, the pipe of the little shape in two;

3, perfect square and open auxiliary hole: on hydraulic compressor, whole pipe broad in the middle, the little shape in two is pressed into rectangular tubular, then the microscler technology through hole of the relative cutting of its longitudinal center line of a pair of opposite planar upper edge in the middle of rectangular tubular.

4, bulging: heat with the circular hole of the squeezed bulging of microscler technology through hole to required size;

5, shaping: the pipe behind the squeezed bulging is carried out shaping, make its two ends become the pipe shape, form arc transition between the middle a pair of opposite planar by rectangular tubular;

6, be shaped: the blank after the shaping is proofreaied and correct shaping, the pipe at two ends carry out shrinkage cavity be processed into needed stepped, the back that is shaped product.

The manufacture method of not cast integrally formed automobile transaxle housing of the present invention, just the partial operation of steel pipe material is shaped, realized the manufacturing of no weld seam driving axle housing body, method is simple, the axle housing tube wall does not have a large amount of attenuation phenomenons, forming process can not cause harmful effect to product material, has improved the technical performance of this drive axle housing, and axle housing is in light weight.The present invention have the stock utilization height, energy-conservation, economize material, characteristics that work efficiency is high.

Description of drawings

Fig. 1 is the outside drawing of the pipe after the blanking of the present invention;

Fig. 2 is the outside drawing of the pipe behind the undergauge of the present invention;

Fig. 3 be perfect square of the present invention and open auxiliary hole after the outside drawing of rectangular tubular;

Fig. 4 is the outside drawing behind the bulging of the present invention;

Fig. 5 is an outside drawing after the shaping of the present invention;

Fig. 6 is the outside drawing of product after the present invention is shaped.

The specific embodiment

Fabrication procedure of the present invention is as follows:

Select the solid drawn pipe of certain diameter, thickness for use, cut the pipe blanking by axle housing length and technological parameter and form needed pipe 1 as shown in Figure 1, on hydraulic compressor, be pressed into pipe 1 broad in the middle then, the pipe as shown in Figure 22 of the little shape in two, on hydraulic compressor, whole pipe 2 broad in the middle, the little shape in two is pressed into rectangular tubular 3 as shown in Figure 3 again, the microscler technology through hole 33,34 of a pair of opposite planar 31, the 32 upper edge relative cuttings of its longitudinal center line in the middle of rectangular tubular 3; Again rectangular tubular 3 is heated as shown in Figure 4 the circular hole 41,42 of microscler technology through hole 33,34 squeezed bulgings to required size; Pipe as shown in Figure 44 behind the squeezed bulging is shaped to as shown in Figure 5 blank 5, makes its two ends become the pipe shape, form arc transition between the middle a pair of opposite planar by rectangular tubular; At last the blank after the shaping 5 is proofreaied and correct shaping, the pipe at two ends carry out shrinkage cavity be processed into needed stepped, the back that is shaped product 6.

Claims

1, the manufacture method of not cast integrally formed automobile transaxle housing, its feature may further comprise the steps:

(1), blanking: select the solid drawn pipe of certain diameter, thickness for use, cut the pipe blanking by axle housing length and technological parameter and form needed pipe;

(2), undergauge: on hydraulic compressor, pipe is pressed into broad in the middle, the pipe of the little shape in two;

(3), perfect square and open auxiliary hole: on hydraulic compressor, whole pipe broad in the middle, the little shape in two is pressed into rectangular tubular, then the microscler technology through hole of the relative cutting of its longitudinal center line of a pair of opposite planar upper edge in the middle of rectangular tubular;

(4), bulging: heat with the circular hole of the squeezed bulging of microscler technology through hole to required size;

(5), shaping: the pipe behind the squeezed bulging is carried out shaping, make its two ends become the pipe shape, form arc transition between the middle a pair of opposite planar by rectangular tubular;

(6), be shaped: the blank after the shaping is proofreaied and correct shaping, the pipe at two ends carry out shrinkage cavity be processed into needed stepped, the back that is shaped product.