Internal expansion type tensioning fixture for end cover sealing plate

Abstract

The invention discloses an internal expansion type tensioning fixture for an end cover sealing plate. The internal expansion type tensioning fixture comprises a machine base, wherein a pull rod is arranged at the center of the machine base; a sliding seat is connected to the upper end of the pull rod and arranged in a sliding groove in the upper end of the machine base; a fixing seat is fixedly arranged at the top end of the machine base; the fixing seat comprises a disc-shaped base plate and a fixing pillar at the center of the upper end of the base plate; positioning pillars matched with counter bores in the bottom surface of the end cover sealing plate are arranged on the upper end edge of the fixing pillar; a sliding inclined groove is formed in each of the positioning pillars; a sliding ring is connected onto the fixing pillar in a sleeving manner; clamping rods matched with the positioning pillars are arranged on the sliding ring; a clamping inclined block matched with the sliding inclined grooves is arranged on each of the clamping inclined blocks; the sliding ring is connected with the sliding seat through long bolts; a pin bush is arranged on each of the long bolts; a dustproof ring is arranged on the base plate; the sliding ring is positioned in the dustproof ring; limiting pillars are uniformly arranged on the base plate. According to the internal expansion type tensioning fixture for the end cover sealing plate, the end cover sealing plate can be clamped stably and reliably, the machining precision is improved, the disassembly and assembly is quick and convenient, and the machining efficiency of the end cover sealing plate is improved.

Description

technical field [0001] The invention belongs to the technical field of fixture design, in particular to an internal expansion type end cover sealing plate tensioning fixture. Background technique [0002] The structure of the engine end cover sealing plate is as follows: Figure 1-3 As shown, it is in the shape of a thin-walled dome with a relatively complex surface shape. Mounting holes 101 with uneven distribution are provided on the end cover sealing plate 10 , and bottom counterbores 102 are provided on the bottom of the mounting holes 101 . After the die-casting of the engine end cover sealing plate, its peripheral edge needs to be finished and trimmed, but ordinary fixtures can only clamp the peripheral edge of the end cover sealing plate, so when the machine tool trims the edge of the end cover sealing plate, the part needs to be After being removed from the fixture for many times, readjust the position and then install it for processing. It cannot be formed in one kn...

AI Technical Summary

Problems solved by technology

After the die-casting of the engine end cover sealing plate, its peripheral edge needs to be finished and trimmed, but ordinary fixtures can only clamp the peripheral edge of the end cover sealing plate, so when the machine tool trims the edge of the end cover sealing plate, the part needs to be After being removed from the fixture for many times, readjust the position and then install it for processing. It cannot be formed in one knife, resulting in too long processing time. Due to the thin wall thickness of the end cover sealing plate, the stability is not strong when clamped by ordinary fixtures, which is easy to cause The sealing plate is deformed, and it is easy to damage its peripheral edge, and repeated loading and unloading will cause slight changes in the positioning of the sealing plate of the end cover, resulting in a processing offset during the processing of the peripheral edge, reducing the machining accuracy, affecting the forming quality of the sealing plate of the end cover, and damaging Sealing performance and pressure performance of sealing plate of end cover

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