Method and equipment for producing directional vertical taper pipe in motorcycle through cold extrusion

A technology of cold extrusion and motorcycle, applied in the direction of metal extrusion dies, metal extrusion mandrels, other household appliances, etc., can solve the problems of waste materials, irregular inner holes, uneven wall thickness, etc., and reach the range of material selection Wide, smooth inside and outside rules, a wide range of options for the effect

Active Publication Date: 2005-03-30
艾德义
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 3. Single selection of materials: Still taking the production of the above-mentioned tapered riser as an example, the diameter of the selected steel pipe should not be too large, because it is too wasteful of material, nor too small, because the production and processing cannot meet the technical requirements of the product, generally only Steel pipes with a diameter of 35.5 mm and a thickness of 5.5 mm can be selected, so its material selection is single
[0006] 4. The riser is rough: due to the heating and forging of the steel pipe, the tapered riser produces an oxide shell from the inside to the outside, and is bent and deformed, with low coaxiality and uneven wall thickness
The resulting oxide shell is unfavorable to cutting, and the turning tool wears a lot
Although the outer surface has been processed with a lathe, the smoothness is still difficult to meet the product requirements, and the inner hole is irregular, there are many oxide shells, and the wall thickness is uneven.
[0007] 5. Heavy workload: the outer surface of the tapered

Method used

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  • Method and equipment for producing directional vertical taper pipe in motorcycle through cold extrusion
  • Method and equipment for producing directional vertical taper pipe in motorcycle through cold extrusion
  • Method and equipment for producing directional vertical taper pipe in motorcycle through cold extrusion

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0039] Such as figure 2 Shown, the steps of the present invention are as follows:

[0040] (1) Neck reaming: Under the cold extrusion of hydraulic equipment, the liquid pressure range is 10MPa ~ 35Mpa, the upper end of the inner diameter is small, the lower end is large, and the middle part is conical, the lower end is cylindrical, and the upper end is double. Cylindrical shrinkage dies with different diameters are placed on the steel pipe from the upper end of the steel pipe 19 coated with a release agent of equal diameter. The lower end is inserted into the steel pipe 19, so that the steel pipe 19 is preliminarily shaped into a conical standpipe 16 with a narrowed upper part and an enlarged lower part with a uniform and smooth outline based on the middle part, and then the hydraulic equipment is used for demoulding; figure 2 - In (b), segment AB is cyli...

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Abstract

A cold extrusion technology for machining the vertical conic stearing tube of motorcycle includes reducing hoop, hole enlargnig and plumply shaping to obtain the target product with conic internal hole, cylindrical upper segment, and stepped cylindrical lower segment. The extrusion apparatus for reducing hoop and enlarging hole is composed of lower and upper demoulding buffer cylinders and shaping cylinder. The extrusion apparatus for plumply shaping consists of demoulding cylinder and extruding cylinder.

Description

(1) Technical field [0001] The invention relates to a production method and a device for a tapered riser, in particular to a method and a device for producing a motorcycle direction tapered riser by cold extrusion. (2) Technical background [0002] Such as figure 1 As shown, the tapered standpipe in the direction of motorcycle is a diameter from large to small, and the appearance shape is successively from the largest diameter straight section (AB section), the conical section (BC section), the smaller diameter straight section (CD section), A steel pipe with a smooth transition of four parts including the straight line segment with the smallest diameter (DE segment). The existing motorcycle direction tapered riser is made of straight steel pipes. The traditional processing method is: firstly heat the steel pipe to raise the temperature, then forge the steel pipe into a cone shape, and then process it after cooling , that is, use a lathe to rough the entire outer surface o...

Claims

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Application Information

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IPC IPC(8): B21C23/03B21C23/08B21C23/21B21C25/08B21K21/08
Inventor 艾德义
Owner 艾德义
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