Secondary heating and precise pre-tightening method for the clamping structure of the c-shaped plate of the heavy-duty press

Abstract

The invention discloses a heavy press C-shaped plate clamping structure and a double heating precision pre-tightening method based on the heavy press C-shaped plate clamping structure. The heavy press C-shaped plate clamping structure comprises an upper cross key and a transverse key body. The upper cross key and the transverse key body are vertically and crosswise combined to form a wedge body. The C-shaped plate clamping structure of the heavy press also comprises four C-shaped plates, two clamping beams and large pull rods, wherein the C-shaped plate A and the C-shaped plate B are parallel with each other; the C-shaped plate C and the C-shaped plate D are parallel with each other; the transverse key body located at the left side of the upper cross key is arranged between the C-shaped plate A and the C-shaped plate B; the transverse key body located at the right side of the upper cross key is arranged between the C-shaped plate C and the C-shaped plate D; one of the two clamping beams is located at one side of the C-shaped plate A, which is far away from the upper cross key; the other clamping beam is located at one side of the C-shaped plate C which is far away from the upper cross key; the large pull rods penetrate through the two clamping beams; and both ends of each large pull rod are also respectively sheathed with pull rod nuts. Precision pre-tightening treatment can be performed on the large pull rods by adopting the double heating pre-tightening technology.

Description

technical field [0001] The invention relates to a heavy-duty press C-shaped plate clamping structure of a heavy-duty press, in particular to a heavy-duty press C-shaped plate clamping structure and a secondary heating precision pre-tightening method thereof. Background technique [0002] The C-shaped plate of the large die forging press is an important part of the forging press. The installation of the C-shaped plate is the key point of the entire rack installation. Since the C-shaped plate is a thin-walled, slender rod with heavy weight at both ends, the deformation of the C-shaped plate is controlled during the process of turning from the side to the stand (refer to The elastic deformation of the C-shaped plate and the direction of deformation) and the control of the impact and shaking of the C-shaped plate during the process of turning over the center of gravity are the difficulties in the installation of the C-shaped plate. [0003] The 800MN large-scale die forging pre...

AI Technical Summary

Problems solved by technology

The pre-tightening method of electric heating cannot quickly and intuitively reflect the size of the pre-tightening force. Although many calculations have been made in advance, there are many influencing factors in the process of implementing the pre-tightening, and it is not easy to eliminate, so the pre-tightening requirements are often not met.

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