Extruding-expanding molding method for rim provided with flange

A flange flange and rim technology, which is applied in the field of rim forming and extrusion molding of rims with flange flanges, can solve the problems of large investment in forming mold tooling and equipment, low material utilization rate, and low forming efficiency. Achieve the effects of shortening machining hours, improving material utilization, and improving forming efficiency

Active Publication Date: 2017-05-17
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The forming methods of the hollow half-shaft rotary structural parts with flanges involved in the above patent documents and articles generally have many forming processes, low forming efficiency, many heating times, and high energy consumption; the complete set of forming mold tooling and equipment investment is large, Large forging margin at the flange part, low material utilization rate, long machining cycle and other deficiencies, resulting in high manufacturing cost

Method used

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  • Extruding-expanding molding method for rim provided with flange
  • Extruding-expanding molding method for rim provided with flange
  • Extruding-expanding molding method for rim provided with flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Cutting

[0031] 7075 aluminum alloy extruded rods with a diameter of 195mm, the length of which is 327mm behind the two circular end faces of the billet placed by the car.

[0032] (2) Heating

[0033] The aluminum alloy billet is heated to 370°C ± 5°C, and held for 2 hours after reaching temperature; the extrusion die is heated to 350°C ± 5°C, and held for 5 hours after reaching temperature. Such as figure 2 As shown, the extrusion die includes a die 3, a flange punch 1 and a shaft tube punch 4, the die 3 is axially hollow to form a cavity 31 and one end forms a flare 32 adapted to the flange of the rim; The flange punch 1 corresponds to the setting of the die 3. The flange punch 1 includes a first convex head 11 for forming the hollow cavity of the rim and a forming portion 12 that cooperates with the flare 32 to form the flange of the rim. The convex head 11 protrudes from the middle part of the molding part 12, and the other end of the half-axis tube punch ...

Embodiment 2

[0040] (1) Cutting

[0041] AZ80 magnesium alloy extruded bar with a diameter of 195mm, after the two circular end faces of the billet placed by Cheping, the length is 329mm.

[0042] (2) Heating

[0043] The heating temperature of the magnesium alloy billet is 335°C±5°C, and it is kept for 2 hours after reaching the temperature; the extrusion die is heated to 300°C±5°C, and it is kept for 5 hours after reaching the temperature. Refer to Example 1 for the structure of the extrusion die.

[0044] (3) Two-way extrusion and expansion forming

[0045] The billet 2 after the heating process is assembled in the die 3; the flange punch 1 and the half-axis tube punch 4 are extruded in the same direction synchronously, the bidirectional feed extrusion speed is 1.5mm / s, and the bidirectional synchronous displacement difference cooperative control is set. Set 0.2mm. After contacting the blank, the flange punch 1 stops running after the extrusion metal deformation feed rate is 75mm, a...

Embodiment 3

[0050] (1) Cutting

[0051] AZ91 magnesium alloy extruded bar with a diameter of 195mm, after the two round end faces of the billet placed by Cheping, the length is 330mm.

[0052] (2) Heating

[0053] The heating temperature of the magnesium alloy billet is 300°C±5°C, and it is kept for 4 hours after reaching the temperature; the mold is heated to 300°C±5°C, and it is kept for 5 hours after reaching the temperature.

[0054] (3) Two-way extrusion and expansion forming

[0055] The billet 2 after the heating process is assembled in the die 3; the flange punch 1 and the half-axis tube punch 4 are extruded in the same direction and synchronously, the bidirectional feed extrusion speed is 1mm / s, and the bidirectional synchronous displacement difference is set by cooperative control 0.2mm. After contacting the blank, the flange punch 1 stops running after the extrusion metal deformation feed rate is 80mm, and the half-axis tube punch 4 continues to run (speed 1.5mm / s) to the fo...

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Abstract

An extruding-expanding molding method for a rim provided with a flange is characterized by comprising the following steps: (1) blanking; (2) heating: rods subjected to blanking and an extrusion mold are heated to an extrusion start temperature respectively; and (3) two-way extruding-expanding molding. Compared with the prior art, the extruding-expanding molding method has the advantages that fewer procedures are included, the whole set of molding tool and equipment investment is small, and the method is suitable for industrial batch production; the molding cycle is shortened, and the molding efficiency is increased; and the manufacture cost is reduced.

Description

technical field [0001] The invention relates to a forming method of a wheel rim, in particular to an extrusion forming method of a wheel rim with a flange flange, which belongs to the technical field of metal processing. Background technique [0002] The rim is the part of the wheel where the tire is fixed, and it is the transfer structure of the vehicle's power output and braking load. During its service, it is subjected to complex alternating stress fields such as bending, compression, torsion, and tension. Higher requirements. [0003] Such as figure 1 Shown is a rim 10 with a flange flange, which belongs to a hollow half-shaft rotary structure with a flange, including a flange portion 10a and a flange portion 10b extending outward from the middle of the flange portion 10a. At present, the traditional manufacturing method of this kind of structural parts is mainly multi-pass forging (composite extrusion or extrusion + cross rolling) billet + machining forming with large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/03B21C25/02B21C29/00B21C29/04
CPCB21C23/03B21C25/02B21C29/003B21C29/04
Inventor 陈刚张继军刘宽心李晓静郑阳升史秀梅倪杨郑顺奇
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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