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Continuous stamping thinning drawing forming process

A technology of stretch forming and process, which is applied in the field of continuous stamping, thinning and stretch forming, can solve the problems of not being able to meet the requirements of the production process, and can not guarantee to reach the IT11 level (0.1mm, material tensile performance decline, etc.

Active Publication Date: 2013-05-22
JIAXING YOUJIA METAL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the stretching adopts the gapless stretching process, the diameter accuracy of the inner hole of the stretching can be improved to reach IT11 level (0.1 mm), but the diameter accuracy of the outer circle of the cylinder cannot be guaranteed to reach IT11 level (0.1 mm) at the same time, but the production efficiency is required to reach 40 times / minute (traditional technology is generally single punch 10 times / minute), which puts extremely high requirements on the mold material and drawing oil. As a result, the tensile properties of the material are significantly reduced, which cannot meet the requirements of the production process.

Method used

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  • Continuous stamping thinning drawing forming process
  • Continuous stamping thinning drawing forming process
  • Continuous stamping thinning drawing forming process

Examples

Experimental program
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Embodiment 1

[0025] Embodiment 1: as Figure 3-Figure 4 As shown, the process steps of this embodiment are as follows:

[0026] 1.1. Cut the material according to the diameter Ds of the shape of the flange material to form a material with a flange; in this example, the cutting line is basically Figure 5 The parentheses shown form the flange portion of the tablet;

[0027] 1.2. Extension 1-3 is stretching with gaps, where:

[0028] 1.2.1. Extension 1, the extension coefficient is 0.57, namely: D1=0.57Ds, D1 is the outer diameter of the cylinder pulled out during the extension process, and Ds is the diameter of the flanged material (in this example, Ds is 27mm) , the radius R1 of the concave die mouth is 3.3 times the thickness t of the material to be processed (in this example, the thickness t is 0.5mm), the gap between the concave and convex dies is 1.05 times the thickness t of the material to be processed, and the drawing height should be such that The raised material volume is sligh...

Embodiment 2

[0035] Embodiment 2: as Figure 3-Figure 4 As shown, the process steps of this embodiment are as follows:

[0036] 1.1. Cut the material according to the diameter Ds of the shape of the flange material to form a material with a flange. In this example, the cutting line is basically Figure 5 parentheses shown;

[0037] 1.2. Extension 1-3 is stretching with gaps, where:

[0038]1.2.1. Extension 1, the extension coefficient is 0.62, that is: D1=0.62Ds, D1 is the outer diameter of the cylinder pulled out during the extension process, and Ds is the diameter of the flanged sheet (in this example, Ds is 27mm) , the radius R1 of the concave die mouth is 3.3 times the thickness t of the material to be processed (in this example, the thickness t is 2mm), the gap between the concave and convex dies is 1.05 times the thickness t of the material to be processed, and the stretching height should be such that the The high material volume is slightly more than the required material volume...

Embodiment 3

[0045] Embodiment 3: as Figure 3-Figure 4 As shown, the process steps of this embodiment are as follows:

[0046] 1.1. Cut the material according to the diameter Ds of the shape of the flange material to form a material with a flange. In this example, the cutting line is basically Figure 5 parentheses shown;

[0047] 1.2. Extension 1-3 is stretching with gaps, where:

[0048] 1.2.1. Extension 1, the extension coefficient is 0.59, that is: D1 = 0.59Ds, D1 is the outer diameter of the cylinder pulled out during the extension process, and Ds is the diameter of the flanged material (in this example, Ds is 27mm) , the radius R1 of the concave die mouth is 3.3 times the thickness t of the material to be processed (in this example, the thickness t is 1.2mm), the gap between the concave and convex dies is 1.05 times the thickness t of the material to be processed, and the stretching height should be such that The volume of the raised material is slightly more than the volume of t...

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Abstract

The invention relates to a continuous stamping thinning drawing forming process. The invention provides a continuous stamping thinning drawing forming process for fully utilizing the advantages and disadvantages of clearance drawing, thinning drawing and flanging thinning drawing to enable the diameter precisions of an inner hole and an external circle to be at an IT11-level. The technical schemeadopted by the invention is as follows: the thickness t of a to-be-processed material is 0.5-2mm and the continuous stamping thinning drawing forming process is characterized by comprising the following steps: cutting a tablet with flanges according to a diameter Ds of a flanged tablet; performing drawing 1-3, namely performing the clearance drawing; performing drawing 4, namely performing the thinning drawing; performing drawing 5, namely performing R drawing; using a conventional process to punch; and performing drawing 6, namely performing the flanging thinning drawing. The continuous stamping thinning drawing forming process is mainly suitable for manufacturing carbon steel products, especially suitable for a steel piece with flanges.

Description

technical field [0001] The invention relates to a continuous stamping, thinning and stretching forming process, which is mainly suitable for manufacturing carbon steel products, especially for steel parts with flanges. Background technique [0002] figure 1 , figure 2 It is a product part structure diagram produced by a very typical continuous stamping, thinning and stretching forming process for special-shaped flange steel parts. This product is characterized by special structure, many processes, and high precision requirements. The traditional stretching process is divided into gap stretching and gapless stretching. At present, due to the limitation of mold materials and stretching oil products in the metal products industry, the general stretching process adopts the gap stretching process, but the performance index that this process can achieve is: the aspect ratio of the large flange stretching is less than 1, The diameter accuracy of the stretched inner hole is belo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/26
Inventor 曾燕华蔡森钢王斌
Owner JIAXING YOUJIA METAL PRODS