Forging forming method for valve cover blank of two-piece type flange connecting ball valve
A connecting ball and two-piece technology, applied in the direction of valve devices, metal processing equipment, etc., can solve the problems of easy bending of the workpiece, poor stability of the workpiece, and unreasonable design, so as to improve the forging coaxiality and high coaxiality , the effect of convenient operation
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[0032] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:
[0033] Such as figure 2 Shown, a kind of two-piece flange connection ball valve bonnet blank forging forming method comprises the following steps:
[0034] The first step: blanking, heating to forging temperature;
[0035] In the first step, it is best to use a band saw to cut the bar to ensure that the saw seam is straight; use an induction heater to heat it to 1150 ° C ~ 1250 ° C with natural gas as fuel.
[0036] Step 2: Form one end flange and shallow hole in the pre-forging die.
[0037] Such as image 3 As shown, the blocker is mainly composed of the lower blocker die 9, the centering sleeve 10 and the first punch 11.
[0038] The lower pre-forging die 9 has a vertically through "T" cavity, and the centering sleeve 10 and the first punch 11 are arranged coaxially with the lower pre-forging die 9 . The bottom of the centering sleeve 10 has a fi...
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