Core rod centering device for perforating machine

Abstract

The invention provides a core rod centering device for a perforating machine, and belongs to the technical field of steel pipe processing machinery. The core rod centering device for the perforating machine comprises a base plate, a rack driving mechanism, a gear driving strip, upper and lower gear shafts, a core rod active clamping and releasing mechanism and core rod upper and lower synchronous clamping mechanisms, wherein a pair of wall plates are fixed on the base plate, rack driving device installing fixing surfaces and cover plate fixing surfaces are respectively formed at the upper parts of the wall plates, the rack driving mechanism is fixed with the rack driving device installing fixing surfaces, the upward side of the gear driving strip forms upper gear engaging teeth, the downward side of the gear driving strip forms lower gear engaging teeth, the upper gear shaft is supported between the pair of wall plates, an upper gear is fixed on the upper gear shaft, the lower gear shaft is supported between the pair of wall plates, a lower gear is fixed on the lower gear shaft, the core rod active clamping and releasing mechanism is connected onto the gear driving strip, and the core rod upper and lower synchronous clamping mechanisms are respectively supported between the pair of wall plates. The operation intensity of workers is reduced, and the clamping and releasing effects are ideal. The core rod centering device has good adaptability to the core rod specification change, and the perforating quality of the core rod on steel round rod blanks is ensured.

Description

Technical field [0001] The invention belongs to the technical field of steel pipe processing machinery, and specifically relates to a core rod centering device for a piercing machine. Background technique [0002] The function of the piercing machine is to pierce the center of the solid steel round bar in the longitudinal direction with the help of a mandrel (the industry is customary to call the mandrel as a pierced rod), and obtain a hollow capillary after piercing. Need specifications such as steel pipe with required wall thickness. The technical information about the piercing machine can be found in the published Chinese patent documents, such as CN2899987Y (Seamless steel pipe tapered piercing machine), CN101652196B (piercing machine), and so on. [0003] As the industry knows, the core rod (the aforementioned piercing rod) needs to be centered during the process of piercing the solid steel round bar blank by the piercing machine to prevent the mandrel from swinging and affec...

AI Technical Summary

Problems solved by technology

But this patent application scheme has the following shortcoming: First, because it needs to realize by the cooperation of a pair of back-up rollers and a pinching roller to the clamping and release of mandrel, and the lifting of a pair of back-up rollers needs to be passed by the on-line operator The manual operation of the hand wheel is realized (see paragraphs 0008 to 0010 of the manual), so the operator, that is, the worker, has a high operating intensity; secondly, due to the manual operation, it is difficult to clamp the mandrel to meet the process requirements, because manual The operation effect not only changes with the individual differences and experience of the workers, but also is affected by the workers' sense of responsibility and emotional changes; thirdly, when the specifications of the steel round bar that needs to be pierced, such as the diameter, change, then the need Replace the mandrel of the corresponding specification, so there is a situation of poor adaptability to the change of the mandrel specification; Fourth, due to the clamping state of the mandrel, between a pair of back-up rollers and a pinch roller corresponding to the upper part of a pair of back-up rollers It is inevitable that there will be even a slight undesired slack, which will lead to insufficient clamping of the mandrel and eventually affect the quality of the piercing of the steel round bar.

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