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Exhaust pipe bending method

An exhaust pipe, straight pipe technology, applied in the field of pipe bending devices, can solve the problems of metal fatigue, corrosion, environmental pollution, etc., and achieve the effect of prolonging the service life, ensuring stable movement, and ensuring force balance

Inactive Publication Date: 2014-12-03
CHENGDU XINGBODA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of the exhaust pipe, simple pipe bending equipment is usually used for bending the exhaust pipe, and the pipe fittings are bent manually. Although this method is simple and easy, it not only increases the work intensity of the staff , There will be obvious wrinkles on the exhaust pipe after the bend, that is, the pipe fittings are partially bulged due to uneven force, and the local bulges of the pipe fittings are prone to metal fatigue. Corrosion, so that the tail gas emission of the loader is not up to standard, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as Figure 1 to Figure 4 As shown, a method for bending an exhaust pipe of the present invention, the straight pipe piece 17 of the exhaust pipe is placed on the annular groove on the column 2, the hydraulic cylinder 3 is started, and the output end of the hydraulic cylinder 3 pushes the stopper 5 to slide The groove 7 moves toward the column 2. When the stopper 5 contacts the column 2 and clamps the straight pipe 17, the two walls of the semicircular groove 6 and the roller 10 on the bottom of the groove contact the straight pipe 17, and the hydraulic cylinder 3 continues to slide. Move in the groove 7, with the arc top of the side of the annular groove facing the stopper 5 as the support point, the two ends of the semicircular groove 6 respectively apply a force to the straight pipe piece 17, so that the straight pipe piece 17 begins to bend and deform, and the annular groove Cooperate with the semicircular groove 6, so that the straight pipe 17 gradually deforms...

Embodiment 2

[0026] Such as figure 1 and image 3As shown, the present embodiment is based on Embodiment 1, and the damping structure includes a roller 10 support and a support cylinder 11, the support cylinder 11 is fixed in the semicircular groove 6, and the roller 10 is arranged on the roller 10 support through the rotating shaft 16. The bottom of the roller 10 bracket is provided with a support rod 13, the support rod 13 is installed in the support tube 11, the support rod 13 is provided with a limit block 14, and a torsion spring is installed between the limit block 14 and the bottom of the support tube 11 15. When the straight pipe piece 17 of the exhaust pipe is in contact with the two ends of the semicircular groove 6, under the propulsion of the hydraulic cylinder 3, the groove wall of the semicircular groove 6 and the roller 10 on the bottom of the groove begin to apply pressure to the straight pipe piece 17, and at the same time After the deformation of the pipe fitting 17, a ...

Embodiment 3

[0028] Such as image 3 As shown, in this embodiment, on the basis of Embodiment 1, the angle formed by the inner walls of the two ends of the semicircular groove 6 and the axis line of the roller 10 on the bottom of the groove is 60°. The distribution of the three rollers 10 on the semicircular groove 6 directly affects the stress of the straight pipe 17 of the exhaust pipe. The angle formed by the axis lines between the rollers 10 is 60°, so that the straight pipe 17 is placed in the semicircular groove 6. There are three evenly distributed stress points inside, and when the stopper 5 is pushed forward, the force balance of the straight pipe piece 17 is ensured, and indentation on the straight pipe piece 17 is avoided.

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Abstract

The invention discloses an exhaust pipe bending method. An arc top on the side, directly facing a stop dog, of an annular groove is used as a supporting point, applied force is exerted on a straight pipe fitting from two ends of a semicircular groove respectively to enable the straight pipe fitting to bend and deform; the annular groove is matched with the semicircular groove to enable the straight pipe fitting to gradually deform in a bent enclosed space; all parts of the straight pipe fitting receive force uniformly in the bent enclosed space, so that the bending part of the straight pipe fitting is prevented from local eminence, and the service life of the exhaust pipe is prolonged.

Description

technical field [0001] The invention relates to a pipe bending device, in particular to a bending method for an exhaust pipe. Background technique [0002] The loader is mainly used for shoveling, loading, unloading, transporting bulk materials such as soil and stone, and can also perform light shoveling operations on rocks and hard soil. If you change to a different working device, it can also complete the work of bulldozing, lifting, loading and unloading other materials. In highway construction, it is mainly used for filling and excavation of roadbed engineering, aggregate and loading of asphalt and cement concrete yards. Because it has the advantages of fast operating speed, good maneuverability and light operation, it has become the main machine in earth and stone construction. [0003] When the loader is working, due to its heavy workload, compared with the angle direction of the exhaust pipe of cars and light family cars, it is generally backward and parallel to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D7/02
Inventor 吴光武
Owner CHENGDU XINGBODA PRECISION MACHINERY
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