Forging method of in-wheel motor housing and techniques thereof
A technology for in-wheel motors and housings is applied in the field of in-wheel motor housing casting, which can solve the problems of high cost of steel rings and inability to guarantee the quality of steel rings, and achieve the effects of low cost, strong magnetic flux balance and cost reduction.
Inactive Publication Date: 2008-07-23
王晓瑛
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Problems solved by technology
[0003] The purpose of the present invention is to provide a casting method and technology for the hub motor shell, which effectively solves the problem of the high cost of steel rings cut from seamless steel pipe segments and the inability to guarantee the steel rings welded with flat steel bars. quality problem
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[0008] Below in conjunction with embodiment the present invention is further described in detail:
[0009] 1. Molten steel refining: Pour the steel material of the identified material into the intermediate frequency furnace, add additional materials, heat and melt at high temperature to form molten steel.
[0010] 2. Steps of centrifugal casting: 1. First heat the mold cylinder made of 9 chromium and 2 molybdenum in a baking furnace. 2. When the mold cylinder is heated to 260±10°C, spray paint, and the thickness of the spray coating is 0.2--0.8mm. 3. When the mold barrel cools down to 100--110°C, cast it through a horizontal centrifuge. The temperature of the molten steel during casting is 1540--1620°C; the mold barrel starts at 350 rpm--the middle 500 rpm- -The last 400 rpm, such a speed process can solve the shortcoming of the billet being porous. 4. Under the action of centrifugal force, the steel billet is formed, and it is demoulded after 20 minutes; the inner diameter ...
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Abstract
The invention discloses a casting method of a hub motor shell and a process thereof, comprising refining molten steel, casting a steel container with a concentric casting technique, cutting the steel container into steel rings by sections, and finishing the steel rings into the hub motor shell. The invention overcomes the defects that the process is complex and the cost is high when the hub motor shell is finished by a seamless steel pipe originally and the magnetic flux is poor, the crater is easy to crack, the usage is unsafe, etc. when the hub motor shell is finished by the steel ring which is welded by flat steel bars at present. The method and the process are simple and practical, the production efficiency is high, the quality is reliable, the cost is lower, and the invention is suitable for the casting requirement of various hub motor shell products.
Description
Technical field: [0001] The invention relates to a component of a motor, in particular to a method for casting a shell of a hub motor and a process thereof. technical background: [0002] The most primitive wheel hub motor housing is made of seamless steel pipe segments cut into steel rings. Due to the high difficulty of making seamless steel pipes, various equipment and complicated processes, the cost of seamless steel pipes is particularly high. In order to reduce costs, the company replaces the steel rings welded with flat steel bars. Therefore, the hub motor shells on the market are generally finished with steel rings welded with flat steel bars. However, steel rings welded with flat steel bars are produced The ring process is also very complicated. It must be identified by the material of the steel. After high-temperature melting, it is cast into a billet. The billet is then hot-rolled into a flat steel bar. The two ends of the two ends are connected by electric weldin...
Claims
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IPC IPC(8): B22D13/12H02K7/14
Inventor 林汝友
Owner 王晓瑛