CN1228362A - Vehicle rear axle shell hydraulic expanding-forming process - Google Patents

Abstract

The vehicle rear axle shell hydraulic expanding process includes the following steps: using hydraulic reducing equipment and hydraulic expanding equipment to cut the vehicle rear axle shell body obtained by means of reducing and expanding treatment according to the requirements of workpiece size, welding flange on the cut flat surface, and uniformly drilling holes on the flange for connecting with axle shell cover,and then welding the end coupling disks on both ends of the axle shell body respectively. By adopting the vehicle rear axle shell body formed by means of reducing and expanding processes to cut and weld flange it can make the shell body wall possess uniform thickness and smooth surface so as to ensure the requirements for vehicle assembly.

Description

The process of vehicle rear axle shell hydraulic expanding-forming

The present invention relates to a kind of process of vehicle rear axle shell hydraulic expanding-forming, belong to mechanical field.

At present, the various light-duty vehicles of domestic automobile manufacturing firm all adopt sheet-metal press working, splicing welding fabrication rear axle housing, though can satisfy the automobile assembling requirement, but exist part quality poor, expend that the energy is many, utilization rate of raw materials is low, production efficiency is not high, labor strength is big, work piece production cost height, electric welding contaminated environment, in short, process falls behind outmoded, compares with international most advanced level to have a long way to go.

The present invention is directed to the problems referred to above, provide a kind of overcome above many shortcomings, need not punching press, welding, the process of the vehicle rear axle shell hydraulic expanding-forming of global formation.

Technical scheme of the present invention is finished as follows:

At first, need adopt two covering devices for finishing the technical program: undergauge device and bulging device, wherein the undergauge device is by advancing oil cylinder, ejecting oil cylinder and constitute, it is characterized in that: two undergauge tires about the two ends of undergauge fairlead are put into advance oil cylinder, eject oil cylinder and act on the undergauge tire respectively and carry out on the undergauge blank pipe; Bulging device is by left and right sides sealed cylinder, about advance oil cylinder, and pressure charging system constitutes, it is characterized in that: put into symmetrical piece sliding die in the fairlead, control loop in the middle of being provided with in the middle of the mould, the mould two ends are sealing ring, about advance oil cylinder, act on the sealed at both ends ring of mould, pressurised oil that pressure charging system provides enters in the bulging blank pipe along axis right side arrow direction.

Secondly, following process is adopted in this invention:

1, diameter reducing process process:

1. shell blanking;

2. the shell material is put into the undergauge fairlead;

3. two undergauge tires about the shell material two ends in the undergauge fairlead are put into;

4. start the propelling oil cylinder, be advanced to the technological requirement size and return original position;

5. start and eject oil cylinder, the intact blank pipe of undergauge is ejected, undergauge finishes for the first time;

6. change the undergauge tire, repeat the above-mentioned undergauge second time that carries out, the rear axle housing body of general requirements is not more than undergauge 3 times.

2, bulging process process:

1. the blank pipe of undergauge is put into sliding mould;

2. start left and right sides sealed cylinder, make the blank pipe be in the excellent sealing state, sealing force is (15-25) * 10 ⁴N;

3. start pressure charging system, press figure axis right side arrow direction and inject hydraulic oil to bulging blank pipe, when pressure was raised to initial bulging and presses, initial bulging pressure was (1.9-4.9) * 10 ⁷Pa advances oil cylinder about startup, axial compressive force in accordance with regulations (80-260) * 10 ⁴N and speed 0.1-12mm/ act on the sealing ring second, push the mould that horizontally slips, and the mould that horizontally slips moves to the centre along fairlead under pressure;

4. (gap is not more than 1.5 wall thickness) bulging end for the first time before the mould that ought horizontally slip contacts with middle control loop;

5. change new sliding die and middle control loop and repeat said process;

6. do not have middle control loop and repeat above-mentioned technology, float for preventing that mould is subjected to expand, adopting clamping force is (300-800) * 10 ⁴N, final pressure reach (0.9-16) * 10 ⁷Pa, all bulging finishes, and obtains qualified rear axle housing body.

3, the automobile axle housing that will finish through undergauge, bulging is by workpiece size requirement cutting, and on cutting planes welding flange, evenly boring on ring flange again, in order to connecting with the axle housing lid, the end tie-plate is welded in axle housing body two ends composition rear axle housing assembly.

The present invention makes rear axle housing body no longer adopt welding fabrication owing to adopt the hydraulic expanding-forming new technology to replace conventional panels punching press, splicing welding shaping method, and the housing wall thickness is even, smooth, guarantees the automobile assembling requirement, save time, laborsaving, economize material, efficient height and cost is low.

Embodiment:

Fig. 1 is a undergauge installation drawing of the present invention

Fig. 2 is bulging device figure of the present invention

Fig. 3 is that the A-A of Fig. 2 is to cutaway view

Fig. 4 is product overall structure figure of the present invention

Fig. 6 is a product partial sectional view of the present invention

With reference to accompanying drawing 1.2, at first, need adopt two covering devices for finishing the technical program: undergauge device and bulging device, wherein the undergauge device is by advancing oil cylinder [1], ejecting oil cylinder [6] formation, it is characterized in that: two undergauge tires [2], [5] about the two ends of undergauge fairlead [4] are put into advance oil cylinder [1], eject oil cylinder [6] and act on the undergauge tire respectively and carry out on the undergauge blank pipe [3]; Bulging device is by left and right sides sealed cylinder [7], [7], about advance oil cylinder [8], [8], and pressure charging system constitutes, it is characterized in that: put into symmetrical piece sliding die [11] in the fairlead [10], control loop [12] in the middle of being provided with in the middle of the mould, the mould two ends are sealing ring [9], [9], about advance oil cylinder [8], [8], act on the sealed at both ends ring of mould [9], [9], pressurised oil that pressure charging system provides enters in the bulging blank pipe [13] along axis right side arrow [14] direction.

Secondly, following process is adopted in this invention:

With reference to accompanying drawing 1,

1, diameter reducing process process:

1. shell blanking;

2. shell material [3] is put into undergauge fairlead [4];

3. two undergauge tires [2], [5] about the shell material two ends in the undergauge fairlead are put into;

4. start propelling oil cylinder [1], be advanced to the technological requirement size and return original position;

5. start and eject oil cylinder [6], the intact blank pipe of undergauge is ejected, undergauge finishes for the first time;

6. change the undergauge tire, repeat the above-mentioned undergauge second time that carries out, the rear axle housing body of general requirements is not more than undergauge 3 times.

With reference to accompanying drawing 2,3,

2, bulging process process:

1. the blank pipe of undergauge is put into sliding mould;

2. start left and right sides sealed cylinder [7], [7], make the blank pipe be in the excellent sealing state, sealing force is 20 * 10 ⁴N;

3. start pressure charging system, press figure axis right side arrow [14] direction and inject hydraulic oil to bulging blank pipe [13], when pressure was raised to initial bulging and presses, initial bulging pressure was 3 * 10 ⁷Pa advances oil cylinder [8], [8] about startup, axial compressive force 150 * 10 in accordance with regulations ⁴N and speed 0.6mm/ act on sealing ring [9], [9] second, push the mould [11] that horizontally slips, and the mould that horizontally slips [11] moves to the centre along fairlead [10] under pressure;

4. (gap equals wall thickness) bulging end for the first time before the mould [11] that ought horizontally slip contacts with middle control loop [12];

5. change new sliding die and middle control loop and repeat said process;

6. do not have middle control loop and repeat above-mentioned technology, float for preventing that mould is subjected to expand, adopting clamping force is 500 * 10 ⁴N, final pressure reaches 10 * 10 ⁷Pa, all bulging finishes, and obtains qualified rear axle housing body.

With reference to accompanying drawing 4,5,

3, will cut by the workpiece size requirement through the automobile axle housing [15] that undergauge, bulging are finished, and on cutting planes welding flange [16], evenly boring [17] on ring flange again, in order to connecting with the axle housing lid, end tie-plate [18] is welded in axle housing body two ends and forms rear axle housing assembly.

Claims (3)

1, a kind of new process of vehicle rear axle shell hydraulic expanding-forming, at first, need adopt two covering devices for finishing the technical program: undergauge device and bulging device, wherein the undergauge device is by advancing oil cylinder [1], ejecting oil cylinder [6] formation, it is characterized in that: two undergauge tires [2], [5] about the two ends of undergauge fairlead [4] are put into, advance oil cylinder [1], eject oil cylinder [6] and act on the undergauge tire respectively and carry out on the undergauge blank pipe [3]; Bulging device is by left and right sides sealed cylinder [7], [7], about advance oil cylinder [8], [8], and pressure charging system constitutes, it is characterized in that: put into symmetrical piece sliding die [11] in the fairlead [10], control loop [12] in the middle of being provided with in the middle of the mould, the mould two ends are sealing ring [9], [9], about advance oil cylinder [8], [8], act on the sealed at both ends ring of mould [9], [9], pressurised oil that pressure charging system provides enters in the bulging blank pipe [13] along axis right side arrow [14] direction.

2, a kind of new process of vehicle rear axle shell hydraulic expanding-forming is characterized in that: following technology is adopted in this invention:

1, diameter reducing process process:

1. shell blanking;

2. shell material [3] is put into undergauge fairlead [4];

3. two undergauge tires [2], [5] about the shell material two ends in the undergauge fairlead are put into;

4. start propelling oil cylinder [1], be advanced to the technological requirement size and return original position;

5. start and eject oil cylinder [6], the intact blank pipe of undergauge is ejected, undergauge finishes for the first time;

6. change the undergauge tire, repeat the above-mentioned undergauge second time that carries out, the rear axle housing body of general requirements is not more than undergauge 3 times.

2, bulging process process:

1. the blank pipe of undergauge is put into sliding mould;

2. start left and right sides sealed cylinder [7], [7], make the blank pipe be in the excellent sealing state, sealing force is (15-25) * 10 ⁴N;

3. start pressure charging system, press figure axis right side arrow [14] direction and inject hydraulic oil to bulging blank pipe [13], when pressure was raised to initial bulging and presses, initial bulging pressure was (1.9-4.9) * 10 ⁷Pa advances oil cylinder [8], [8] about startup, axial compressive force in accordance with regulations (80-250) * 10 ⁴N and speed 0.1-12mm/ act on sealing ring [9], [9] second, push the mould [11] that horizontally slips, and the mould that horizontally slips [11] moves to the centre along fairlead [10] under pressure;

4. (gap is not more than 1.5 wall thickness) bulging end for the first time before the mould [11] that ought horizontally slip contacts with middle control loop [12];

5. change new sliding die and middle control loop and repeat said process;

6. do not have middle control loop and repeat above-mentioned technology, float for preventing that mould is subjected to expand, adopting clamping force is (300-800) * 10 ⁴N, final pressure reach (0.9-15) * 10 ⁷Pa, all bulging finishes, and obtains qualified rear axle housing body.

3, will cut by the workpiece size requirement through the automobile axle housing [15] that undergauge, bulging are finished, and on cutting planes welding flange [16], evenly boring [17] on ring flange again, in order to connecting with the axle housing lid, end tie-plate [18] is welded in axle housing body two ends and forms rear axle housing assembly.

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