CN1709606A - Three-boss flexible expanding die of vibration damper liquid-storage cylinder and expanding process - Google Patents

Abstract

The invention discloses a three protruding platform bulge mould for processing the liquid tube of shock-reducer. The bulge mould includes a bulge die and a upper press die. The shape of bulge model cavity is matching with the shape of the three-projection-platform on the liquid storage tube. The characteristic is that there is bugle soft die in the bulge shape cavity and the bugle soft die is under the upper pressing die and it is made up of flexible material. The process of bulging shape is: put preparative workpiece straight into bulge die cavity, and put the soft die into the workpiece and then tighten the bulge die; The upper press soft die extrudes the workpiece to make workpiece full of bugle die and the workpoece is deformed along shape of bulge die. The invention has the characteristic of reasonable design, reduced production cost, advanced eligibility of product, simple process of machining, short machining cycle.

Description

Three boss flexible expanding die and bulging process of shock absorber surge drum

Technical field

The present invention relates to the processing technology of a kind of mould and this mould of use, especially a kind of three boss flexible expanding die and bulging process that are used to process the shock absorber surge drum, it is used to process three boss that expand on the shock absorber surge drum.

Background technology

In the technological process of production of whole surge drum, the technology difficulty maximum of bloated three boss, this technology all adopts rigid mould as shown in Figure 1 to process abroad, belong to the die processing technology, the skin of this rigid mould is an expanding die 1 ', the firm mould 5 of resilient bulging of middle device, the outer wall of the firm mould 5 of the die cavity of expanding die 1 ' and bulging forms according to workpiece 3 ' the required boss dimensioned; When top die 2 ' stressed moving downward, its tapering part struts the firm mould 5 of bulging, and extruding workpiece 3 ' is along the shape bending forming of expanding die 1 ' die cavity.Because this mould has many corner angle on the firm mould 5 of bulging, material is easy to spread in the process of extrusion stretching and splits, the scrappage height of product, secondly this technology is higher to the requirement of tubing, need temper, presentation quality after the workpiece processing is difficult for meeting the demands, and all very high to the machining accuracy of equipment and mold, and this has increased processing cost greatly.

Summary of the invention

Technical problem to be solved by this invention provides a kind of reasonable in design, can reduce production costs, improve three boss flexible expanding dies of the shock absorber surge drum of product percent of pass.

Another technical problem to be solved by this invention provides a kind of technology of using above-mentioned flexible expanding die processing shock absorber surge drum three boss, this work simplification manufacturing procedure, shortened the process-cycle, improved product percent of pass.

The present invention addresses the above problem the technical scheme that is adopted: three boss flexible expanding dies of this shock absorber surge drum, comprise expanding die and the top die that is positioned at the expanding die die cavity, three boss shapes are complementary on the shape of expanding die die cavity and the shock absorber surge drum, it is characterized in that: in the expanding die die cavity, also be provided with the bulging soft mode, the bulging soft mode is positioned at the top die below, and the bulging soft mode is made by elastomeric material.

Expanding die of the present invention is a steel part.

Bulging soft mode of the present invention is a polyurethane material.

The present invention addresses the above problem another technical scheme that is adopted: use the shock absorber surge drum three boss soft mode bulging process of above-mentioned flexible expanding die to carry out according to the following steps,

(1) workpiece that will need to process is vertically put into the expanding die die cavity, again the bulging soft mode is put into workpiece, locks expanding die then;

(2) top die is exerted pressure to the bulging soft mode, bulging soft mode dilatancy, and the extruding workpiece makes workpiece be full of whole expanding die die cavity and along the cavity shape brake forming;

(3) unclamp expanding die, take out workpiece.

Flexible expanding die of the present invention compared with prior art has following beneficial effect: 1, the workpiece raw material do not need to carry out temper, have simplified operation, have shortened the process-cycle, have reduced raw material because of the distortion that tempering produces yet, and have reduced production cost; 2, can strictly control press pressure parameter, mold-locked parameter and regulation detection method, because the bulging soft mode is a soft mode, so the cavity pressure unanimity, the modification amount is identical, reduced the required precision to equipment, die then needs high precision apparatus, and this has further reduced production cost; 3, owing to be soft mode, can not produce wedge angle excessively and stress is concentrated and caused workpiece to break as die, product percent of pass can reach more than 99.9%; 4, expanding die adopts steel part, and according to the size spark machined of three boss, precision is very high, and heat-treats, and can guarantee batch process.

Bulging process of the present invention compared with prior art, have following beneficial effect: 1, this technology is by exerting pressure to the bulging soft mode, make its dilatancy, the extruding workpiece makes workpiece be full of whole expanding die die cavity, reaches the purpose of bulging, because the bulging soft mode has very strong resilience, tear resistance and very high percentage elongation, so three boss face of processing back workpiece become the streamlined of grace and forming surface is full, along the circumferential direction do not have mistake circle phenomenon, and overall appearance is consistent; 2, through the long-term production practice, this technology has played obvious effects, the constant product quality of being produced, every dimensional tolerance index, boss intensity experiment, airtight experiment all meet the product technology requirement, comparing with traditional die processing technology has very big breakthrough, reaches the international leading level.

Description of drawings

Fig. 1 is the structural representation of mould in the prior art.

Fig. 2 is the structural representation of the flexible expanding die of the embodiment of the invention.

Fig. 3 is the structural representation of workpiece after the processing of the embodiment of the invention.

Fig. 4 is the A-A cutaway view of Fig. 3.

Fig. 5 is the B place amplification profile of Fig. 3.

The specific embodiment

Referring to Fig. 2, this flexible expanding die is made up of expanding die 1, top die 2, bulging soft mode 4, and bulging soft mode 4 and top die 2 are positioned at the die cavity of expanding die 1, and top die is positioned at bulging soft mode 4 tops.Expanding die 1 adopts steel part, and its cavity shape and the size boss size spark machined required according to workpiece 3, and through Overheating Treatment, with the assurance high accuracy.Bulging soft mode 4 adopts polyurethane material, has very strong resilience, tear resistance and very high percentage elongation, to guarantee that processed workpiece 3 profiles are full, it is graceful streamlined to become, is consistent on the whole.

Processed workpiece 3 has three boss 7 as Fig. 4, shown in Figure 5 on it, the shape and size of expanding die 1 die cavity are promptly processed according to the size of these three boss 7.

The equipment that uses the bulging process of this flexible expanding die to use is hydraulic press, and its concrete steps are as follows:

(1) workpiece 3 that will need to process is vertically put into the die cavity of expanding die 1, and the workpiece 3 of this moment is a tubulose, again bulging soft mode 4 is put into workpiece 3, rap the end face of workpiece 3 with copper rod, workpiece 3 is contacted fully with the bottom, screw the patrix locking nut then, locking expanding die 1;

(2) start hydraulic press, 2 pairs of bulging soft modes 4 of top die are exerted pressure, bulging soft mode 4 dilatancies, extruding workpiece 3, make workpiece 3 be full of the die cavity of whole expanding die 1 and along the cavity shape brake forming, form three boss 7, the workpiece 3 after the moulding is as Fig. 4, shown in Figure 5;

(4) unclamp the patrix locking nut, expanding die unclamps, and takes out workpiece.

Workpiece after the taking-up need wipe out greasy dirt, is put on the special-purpose detecting tool for detecting height to detect.

Claims (4)

1, a kind of three boss flexible expanding dies of shock absorber surge drum, comprise expanding die and the top die that is positioned at the expanding die die cavity, three boss shapes are complementary on the shape of expanding die die cavity and the shock absorber surge drum, it is characterized in that: in the expanding die die cavity, also be provided with the bulging soft mode, the bulging soft mode is positioned at the top die below, and the bulging soft mode is made by elastomeric material.

2, three boss flexible expanding dies of shock absorber surge drum according to claim 1, it is characterized in that: described expanding die is a steel part.

3, three boss flexible expanding dies of shock absorber surge drum according to claim 1, it is characterized in that: described bulging soft mode is a polyurethane material.

4, a kind of shock absorber surge drum three boss soft mode bulging process that use the described flexible expanding die of claim 1 is characterized in that: carry out according to the following steps,

(1) workpiece that will need to process is vertically put into the expanding die die cavity, again the bulging soft mode is put into workpiece, locks expanding die then;

(2) top die is exerted pressure to the bulging soft mode, bulging soft mode dilatancy, and the extruding workpiece makes workpiece be full of whole expanding die die cavity and along the cavity shape brake forming;

(3) unclamp expanding die, take out workpiece.

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