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[CN 201611103485.2] A frame structure capable of being pre-tightened at all times for a large combined hydraulic press
[CN 201611103485.2] Title of a Frame Structure that Can Be Pretightened from Time to Time for a Large Combined Hydraulic Press: Application Number of a Frame Structure that Can Be Pretightened from Time to Time for a Large Combined Hydraulic Press: CN 201611103485.2 Applicant: Dalian Design and Research Institute Co., Ltd. of Yizhong Group; China First Heavy Machinery Co., Ltd. Application Date: 2016-12-5 Patent Type: Invention Application This invention discloses a frame structure that can be pretightened from time to time for a large combined hydraulic press, including: tension bolts, frame, stress test device, automatic pre-tightening device, upper nut and lower nut; The frame is a rectangular frame structure consisting of a top load-bearing structure, an intermediate support structure and a bottom load-bearing structure, and has a rectangular operating cavity with opposite sides penetrating inside, the top bearing structure, the middle supporting structure and the bottom bearing structure are all penetrated by the tension bolt, and then assembled with the tension screw by the upper nut and the lower nut; the upper nut is equipped with an automatic pre-tightening device for driving the upper nut to rotate; the middle surface of each tension bolt is provided with a stress testing device, and the communication line of the stress testing device is connected with the automatic pre-tightening device.
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