A Simple Die Forging Method for Double Flange Large Valve Body
A double flange and tire die forging technology, which is applied in the direction of metal processing equipment, can solve the problems of long machining, low production cost, and large size.
Active Publication Date: 2020-10-20
JIANGSU LONGSHENG DRILLING MACHINERY MFG
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Problems solved by technology
The traditional valve body is formed by casting. Although casting is easy to form and has low production cost, most of the cast parts have defects such as looseness and pores inside.
The actual working conditions are sometimes high temperature and high pressure, and the defects of castings can easily cause liquid leakage, which cannot meet the high safety and high reliability requirements of the industry.
[0003] Due to the above-mentioned shortcomings, the existing valves are formed by forging, which can effectively improve the defects of the above-mentioned valves and meet the requirements of the current industry. When forging 5" (5" here refers to a diameter of 5 inches in the industry) For the above-mentioned large double flange and large valve body, due to the large size and high cost of die forging, steel billets are often used for upsetting and drawing modification, free forging to form long squares, then vertical punching, and finally machining into valve bodies. The forging method has the problems of high cost of raw materials, long machining time and low efficiency
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Embodiment 1
[0034] Such as Figure 1-5 As shown, a simple tire die forging method for a double-flange large valve body, the specific forging steps of a double-flange large valve body are as follows:
[0035] 1) Cutting: Carry out sawing and cutting on the sawing equipment, that is, use a high-speed band saw blade to saw the raw billet into a cylindrical billet with a diameter of 600mm and a length of 1008mm that meets the blanking standard, and remove the burr defects on the billet surface;
[0036] 2) Heating: Put the steel billet into the heating furnace for heating by the manipulator, and finally keep it at a high temperature of 1230°C for 5 hours, and then take it out by the manipulator;
[0037] 3) Upsetting and changing forging: put the hot billet between the upper and lower flat anvils of the forging hammer by the manipulator, and use the hammer anvil to upset, elongate and re-upset the steel billet, and finally grow to 1065mm in length, 470mm in width and 470mm in height 570mm re...
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The invention discloses a simple loose tooling forging method of a double-flange large valve body. The high-quality double-flange large valve body can be forged through forging processes such as blanking, heating, upsetting and drawing forging pretreatment, trimming, detection, secondary heating and flange forming, the consumption of raw materials is lower than the consumption of raw materials ofa conventional forging method, and thus the manufacturing cost of the raw materials is reduced; and a valve body loose tooling forging close to a formed part can be forged, forging and forming by using a die forging technology subsequently are facilitated, the mechanical processing time is reduced, the forging process is simple and convenient, improvement of forging efficiency is facilitated, an UT qualification rate of the finally formed double-flange large valve body is high, the forming effect is good, and the forging quality of the double-flange large valve body is improved.
Description
technical field [0001] The invention relates to the technical field of forging a large valve body with double flanges, in particular to a simple die forging method for a large valve body with double flanges. Background technique [0002] Valves are the basic parts of industry and are widely used in industry. The traditional molding of the valve body is casting. Although casting is easy to shape and the production cost is low, most of the cast parts have defects such as looseness and pores inside. The actual working conditions are sometimes high temperature and high pressure, and the defects of castings can easily cause liquid leakage, which cannot meet the high safety and high reliability in the industry. [0003] Due to the above-mentioned shortcomings, the existing valves are formed by forging, which can effectively improve the defects of the above-mentioned valves and meet the requirements of the current industry. When forging 5" (5" here refers to a diameter of 5 inches...
Claims
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IPC IPC(8): B21J5/00
Inventor 朱叔朋宋克伟李文齐杨文飞陆荣华
Owner JIANGSU LONGSHENG DRILLING MACHINERY MFG