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Forming method of straight-wall cylindrical piece with uniform wall thickness

A cylindrical part and straight wall technology, applied in the field of forming straight wall cylindrical parts, can solve the problems of low cost, short processing cycle and long cycle, and achieve the effects of low cost, uniform wall thickness and short forming cycle

Inactive Publication Date: 2020-01-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional cylindrical parts are formed by deep drawing of sheet metal. According to the size of the cylinder and referring to the relevant manuals, the number of drawing times and the transition shape in the middle are calculated, and then the mold for each deep drawing is designed, and the processed cylindrical parts The wall thickness is uneven, the processing cost is high, the cycle is long, and it cannot adapt to the diversified and personalized development direction of today's market
The incremental forming process adopts the idea of ​​layered manufacturing in rapid manufacturing technology, discretizes the parts to be formed into a series of two-dimensional planes for layer-by-layer forming, and drives the forming equipment through the pre-programmed NC program to layer the sheet material point by point Forming, the processing cycle is short and the cost is low, but it is still a difficult problem to obtain parts with uniform wall thickness through multi-pass forming

Method used

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  • Forming method of straight-wall cylindrical piece with uniform wall thickness
  • Forming method of straight-wall cylindrical piece with uniform wall thickness
  • Forming method of straight-wall cylindrical piece with uniform wall thickness

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Embodiment Construction

[0038] The schematic diagram of the geometric parameters of the target straight wall cylindrical part is as follows figure 1 As shown, D=78mm, H=39mm, r=12mm, t=0.3mm, according to the principle of constant volume, t 0 =t / [D 2 / (D 2 -2(4-π)Dr)+4(3-π)r 2 +4DH]=0.84mm, choose 1060 aluminum with a thickness of 0.84mm as the original sheet, the forming limit angle is 67°, and the axial feed is 0.4mm.

[0039] The first pass adopts a three-stage forming path, and the radius is R=D / 2=39mm, and the depth is H from top to bottom. 1 =0.515D+0.0001667(D-58)(D-78)-5.291e-7(D-118)(D-58)(D-78)+0.83=41mm three-step cone barrel: the first straight line The forming angle is θ 1 =64°, the distance between the starting point of the straight line and the central axis is R=39mm, the distance between the end of the first segment of the straight line and the central axis is L 2=0.365D+0.0002083(D-58)(D-78)-1.918e-6(D-118)(D-58)(D-78)-0.37=29.4mm; the forming angle of the second straight line ...

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Abstract

The invention discloses a forming method of a straight-wall cylindrical piece with uniform wall thickness. The method comprises the following steps that (1) the size of the target cylindrical piece isdetermined; (2) the original plate thickness t0 is determined according to the size of the target cylindrical piece; (3) a three-section forming path is utilized in a first pass to machine a three-step conical bucket piece with the radius of R and the depth of H1; (4) a second-section forming path is utilized in a second pass to machine a two-step conical bucket piece with the radius of R and thedepth of H1; (5) a second-section forming path is utilized in a third pass to machine an arc-bottom conical bucket piece with the radius of R and the depth of H3; (6) a workpiece with the radius of R, the depth of H and the arc radius of r is machined in a fourth pass; and (7) when the height-to-diameter ratio H / D of the target piece is 0.5, the workpiece obtained in the step (6) is the target piece, and when the height-to-diameter ratio H / D of the target piece is smaller than 0.5, redundant height is removed to obtain the target piece. According to the method, the straight-wall cylindrical piece with the uniform wall thickness can be formed, the forming method is simple, the cost is low, and the forming period is short.

Description

technical field [0001] The invention relates to a method for forming a straight-walled cylindrical part, and more particularly, to a method for forming a straight-walled cylindrical part with a relatively uniform wall thickness. Background technique [0002] The relatively uniform wall thickness of sheet metal parts is one of the most important difficulties in sheet metal forming. The processing technology selection and performance requirements of each part are based on the requirement of uniform wall thickness in most cases. Traditional cylindrical parts are formed by deep drawing of sheet metal. According to the size of the cylinder and referring to the relevant manuals, the number of drawing times and the transition shape in the middle are calculated, and then the mold for each deep drawing is designed, and the processed cylindrical parts The wall thickness is uneven, the processing cost is high, the cycle is long, and it cannot adapt to the diversified and personalized d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D31/00B21D51/10
CPCB21D31/005B21D51/10
Inventor 张沈杨高锦张李广明
Owner SOUTHEAST UNIV
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