A Method of Improving the Surface Quality of NC Incrementally Formed Parts

A technology of surface quality and progressive forming, which is applied in the field of CNC progressive forming processing and manufacturing, can solve problems such as friction marks, wavy dents, and direct contact, and avoid friction marks and wavy dents, which is conducive to popularization and application Effect

Active Publication Date: 2019-01-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Purpose: The invention of this process aims to solve the problems of friction marks and wavy dents on the surface of the parts caused by the direct contact between the forming tool and the forming sheet. Improving the surface quality of the part due to the direct contact of the formed sheet

Method used

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  • A Method of Improving the Surface Quality of NC Incrementally Formed Parts
  • A Method of Improving the Surface Quality of NC Incrementally Formed Parts
  • A Method of Improving the Surface Quality of NC Incrementally Formed Parts

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Embodiment 1

[0035] It is planned to use 1.5mm aluminum alloy AA2024 as the forming sheet material of the forming part, adopt the double-point progressive forming method to form the part, use the aluminum alloy as the rigid cushion, and the plastic as the flexible cushion. A model of a formed part such as image 3 Shown, wherein the formed part length a = 300mm, width b = 300mm, height c = 60mm. The manufacturing goal is to form the part. Combine below figure 2 , 3 and 4 illustrate the specific implementation steps of the present invention:

[0036] Step 1. Select the forming method and process parameters: select the two-point CNC incremental forming method according to the actual processing conditions; since the wooden mold 6 is used in the double-point incremental forming process, the friction caused by the wooden mold to the surface of the formed sheet can be ignored, so only need A rigid cushion 3 and a flexible cushion 2 are placed between the forming tool 4 and the formed sheet 1...

Embodiment 2

[0041] It is planned to use 1mm titanium alloy TC01 as the forming sheet material of the forming part, and adopt the single point progressive forming method to form the part, use the steel plate as the rigid cushion, and the grease as the flexible cushion. A model of a formed part such as image 3 Shown, wherein the formed part length a = 300mm, width b = 300mm, height c = 60mm. The manufacturing goal is to form the part. Combine below figure 2 , 3, 4 and 5 illustrate the specific implementation steps of the present invention:

[0042] Step 1. Select the forming method and process parameters: select the single-point CNC progressive forming method according to the actual processing conditions; select the process parameters as the step depth of 0.1mm according to the selected forming method and the size, material properties and thickness of the formed sheet, and the forming The tool is a hemisphere with a diameter of 20mm, and the forming tool material is cemented carbide YG...

Embodiment 3

[0047] It is planned to use 0.5mm stainless steel AISI304 as the forming sheet material of the forming parts, adopt the motion progressive forming method to form the parts, use plastic as the rigid cushion, and rubber as the flexible cushion. A model of a formed part such as image 3 Shown, wherein the formed part length a = 300mm, width b = 300mm, height c = 60mm. The manufacturing goal is to form the part. Combine below figure 2 , 3, 4 and 6 illustrate the specific implementation steps of the present invention:

[0048] Step 1. Select the forming method and process parameters: select the motion CNC incremental forming method according to the actual processing conditions; since two forming tools are used to act on the two surfaces of the part in the motion incremental forming process, it is necessary to place rigid plates on both sides of the formed sheet. Cushion and flexible cushion; according to the selected forming method and the size, material properties and thicknes...

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Abstract

The invention discloses a method for improving the surface quality of a numerical control incrementally-formed part. The method comprises the steps that firstly, a forming method and process parameters are selected; secondly, materials of cushion layers are selected, specifically, the materials and the thicknesses of the cushion layers are selected according to the minimum forming angle and the surface quality requirement of the part needing to be formed; thirdly, the cushion layers and a forming plate material are placed, specifically, the placement positions of the rigid cushion layer and the flexible cushion layer are determined according to the forming method, and the rigid cushion layer material and the flexible cushion layer material are placed on the surface of the forming plate material; fourthly, the part is formed, specifically, the part is formed through numerical control incremental forming equipment according to the process parameters determined in the first step, after forming, the rigid cushion layer and the flexible cushion layer are separated from the part formed by the forming plate material, and thus machining is finished. The surface quality problem caused by local direct contact of a forming tool and the forming plate material is solved; and under the condition of the appropriate process parameters, the surface quality problems such as abrasion marks and corrugated dents on the surface of the part are avoided, and thus application and popularization of the numerical control incremental forming process are facilitated.

Description

【Technical field】 [0001] The invention relates to a method for improving the surface quality of a numerically controlled progressively formed part, which can effectively solve the surface quality problem of the formed part, and belongs to the field of numerically controlled progressively formed processing and manufacturing. 【technical background】 [0002] Metal sheets are widely used in aviation, aerospace, automobile, shipbuilding and other manufacturing industries. The traditional sheet metal stamping forming method is suitable for mass production and processing, but for small batches, multi-variety and sample trial production processing, a new technology has emerged in recent years. CNC incremental forming method for sheet metal. NC incremental forming causes local deformation of the sheet metal through the local contact between the forming tool and the sheet metal. With the continuous movement of the forming tool, the local deformation accumulates continuously to form th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D31/00
Inventor 李小强韩凯李东升
Owner BEIHANG UNIV
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