Hot extrusion and near net forming method of asymmetric aluminum alloy flange plate with convex lug
A near-net shape and extrusion forming technology, which is applied in the direction of metal extrusion dies, metal processing equipment, transportation and packaging, etc., can solve the problems of low material utilization, poor mechanical properties of parts, long processing cycle, etc., and achieve shortened forming The effect of reducing the cycle time, reducing the amount of processing, and improving the utilization rate
Active Publication Date: 2018-09-14
BEIJING HANGXING MACHINERY MFG CO LTD
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Problems solved by technology
[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a near-net forming method for hot extrusion of an asymmetric aluminum alloy flange with lugs, which can overcome the poor mechanical properties of the parts processed by the prior art, Shortcomings such as long processing cycle and low material utilization rate can effectively ensure the precision near-net shape of asymmetric aluminum alloy flanges with lugs
Method used
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specific Embodiment approach
[0035] The specific embodiment is carried out according to the following process steps:
[0036] Step 1. Determine the basic extrusion parts: according to the parts diagram of the asymmetrical aluminum alloy flange with lugs that needs to be formed, convert it into a basic extrusion part. Leave a machining allowance of 5 mm on the surface, and consider the difficulty of demoulding. The extruded part is drawn, and the draft angle is 2°;
[0037] Step 2, calculation of the size of the hot extrusion billet: according to the principle of constant plastic deformation volume, the size of the cylindrical billet required for hot extrusion forming (ie is 200mm, h is 140mm), and processed out;
[0038] Step 3, designing a hot extrusion die: According to the flange extrusion obtained in Step 1, design and manufacture a hot extrusion die for an asymmetrical aluminum alloy flange with lugs. Extrusion dies include upper and lower dies, such as figure 2 , image 3 , Figure 4 As shown...
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Abstract
The invention provides a hot extrusion and near net forming method of an asymmetric aluminum alloy flange plate with a convex lug, which is applicable to aluminum alloy disc-shaped members with relatively high mechanical properties and complicated shapes and belongs to the field of precision plastic formation. The method provided by the invention comprises the following steps: (1) transforming into a basic extrusion part according to a flange plate part drawing; (2) determining the size of an extrusion blank; (3) designing and processing a hot extrusion die of the asymmetric aluminum alloy flange plate with the convex lug; (4) carrying out free forging on the blank; (5) carrying out reaming; (6) removing punching recess; (7) carrying out hot extrusion; (8) carrying out fine processing. Themethod provided by the invention is simple and feasible; the formed flange plate has high size precision and excellent mechanical properties; near net forming of parts can be realized; a non-matchingsurface does not need to be mechanically processed again, so that the subsequent processing amount is effectively reduced, the forming period is shortened and the efficiency is improved.
Description
technical field [0001] The invention relates to a precision plastic forming method, in particular to a near-net forming method for hot extrusion of an asymmetrical aluminum alloy flange with lugs, which is suitable for aluminum alloy disc-shaped components with high mechanical properties and complex shapes, and belongs to field of precision plastic forming. Background technique [0002] With the increasingly acute environmental and energy issues, environmental protection and energy conservation have gradually received more and more attention and attention. Therefore, products in the 21st century are gradually developing in the direction of integration, light weight, high precision, and low energy consumption. Due to its excellent performance, aluminum alloys are widely used in aerospace, rail transit, weaponry and other fields. In the field of aerospace, the requirements for light weight, high strength and low energy consumption of products are getting higher and higher. A...
Claims
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IPC IPC(8): B21C25/02B21K1/32B21J5/08B21J5/10
CPCB21C25/02B21J5/08B21J5/10B21K1/32
Inventor 薛杰张素敏李保永刘奇郭晓琳李艳丽
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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