Method for machining and manufacturing oil tank supporting frame

A technology of processing and manufacturing brackets, which is applied in the field of processing and manufacturing fuel tank brackets, can solve problems such as brittle fractures and component section weakening, and achieve the effects of reducing stress concentration, reducing workload, and uniform force

Inactive Publication Date: 2015-01-21
CHENGDU XINGBODA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional fuel tank bracket usually uses a bending die to process the steel. First of all, the bracket is not suitable for bending and then punching because of the large depth of the edge. Therefore, the steel is punched first, and then the steel is bent. But The above problems are prone to occur in the traditional bending process, that is, after the bending of the bracket is welded to the fuel tank, the fuel tank is prone to form stress concentration points at the bending of the bracket during work, and there may be welding defects , micro-cracks are gradually generated at stress concentration points and welding defects, forming fatigue sources. As the mileage increases, the cracks gradually expand, and the cross-section of the component is gradually weakened, so that it cannot bear the applied load and suddenly brittle fracture occurs

Method used

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  • Method for machining and manufacturing oil tank supporting frame
  • Method for machining and manufacturing oil tank supporting frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 and figure 2 As shown, a method for manufacturing a fuel tank bracket in the present invention, the upper mold base 5 is separated from the lower mold base 7 driven by the driving equipment, the steel plate raw material is placed on the forming block 2, and the upper mold base 5 is driven to move downward , the punch 4 is in contact with the forming block 2, the steel plate is stressed and the part in contact with the punch 4 continues to move down, and when the punch 4 moves to the bottom of the groove, it stops moving, and the upper surface of the forming block 2 is two connected inclined surfaces , under the downward pressure of the punch 4, the steel plate can be pressed into the required bending angle of the fuel tank bracket; a discharge cavity 9 is provided in the lower die base 7, when the punch 4 presses the steel plate to the bottom of the forming groove 11 , the discharge rod 3 is forced to move down, and at the same time, the baffle plate ...

Embodiment 2

[0023] Such as figure 1 and figure 2 As shown, this embodiment is based on Embodiment 1, the groove wall of the forming groove 11 is arc-shaped, and the groove width of the forming groove 11 gradually decreases along the vertical direction. The two walls of the forming groove 11 are protruding circular arcs, so that the groove width of the forming groove 11 decreases gradually along the vertical direction, and the smooth circular arc surface can reduce the friction force of the steel plate moving down in the groove and reduce the pressure of the punch 4 times. The resistance to shifting can reduce the workload of the driving equipment during the bending process of the steel plate, and indirectly reduce the production cost.

Embodiment 3

[0025] Such as figure 2 As shown, this embodiment is based on Embodiment 1, the punch 4 is a trapezoidal block matching the forming groove 11, and leveling plates 12 are installed on both sides of the trapezoidal block. The punch 4 matches the profile of the forming groove 11, and the steel plate can be bent into the required shape. The flat plate 12 installed on both sides of the trapezoidal block can make the steel plate form a supporting surface, and the supporting surface increases the bracket and The contact area of ​​the fuel tank ensures the stability of the fuel tank during use.

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Abstract

The invention discloses a method for machining and manufacturing an oil tank supporting frame. According to the method for machining and manufacturing the oil tank supporting frame, two mutually connected inclined surfaces enable a steel plate to be stressed overall, the steel plate is evenly stressed during machining, local stress concentration appearing on a bent portion of a formed supporting frame blank is reduced, the situation that a fatigue source is formed by fine cracks generated on the welded portion of the bent portion of the supporting frame in the user process after the supporting frame is welded to an oil tank is avoided, and the service life of the supporting frame is prolonged.

Description

technical field [0001] The invention relates to a bending structure, in particular to a method for processing and manufacturing an oil tank bracket. Background technique [0002] The vehicles with damaged fuel tank brackets are mainly tractors, and the running roads are generally above the secondary road conditions. When the vehicles travel about 7000km, there are batches of hidden dangers of cracks or fractures. During the operation of the fuel tank bracket, it mainly bears the mass load of the fuel tank, and at the same time, it will be affected by the dynamic load coefficient, that is, the impact of the road surface, which makes the stress environment of the fuel tank bracket worse. The failure of the fuel tank bracket was preliminarily judged to be fatigue fracture. Since the bracket was welded by two pieces of "several" steel, there was no external reinforcement plate at the welding position, which was relatively weak, and it was subjected to impact loads during work, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D5/06B21D45/04B21D37/10
CPCB21D5/06B21D37/10B21D45/04B21D53/88
Inventor 吴光武
Owner CHENGDU XINGBODA PRECISION MACHINERY
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