Novel rolling wheel for pipe bending machine

Abstract

The invention relates to a novel rolling wheel for a pipe bending machine. The rolling wheel is arranged on a rolling wheel seat; guide slots are circumferentially formed in a shaft neck of the rolling wheel; a straight-line guide slot is formed outside each guide slot; and a semi-circle line, on the shaft neck of the rolling wheel, of each straight-line guide slot is a starting point, and a sinking step is arranged outside each straight-line guide slot, so that at the time, the rolling wheel forms the stepped rolling wheel with one surface being a circular arc surface and the other surface being provided with the sinking steps. The novel rolling wheel for the pipe bending machine has the further improvement that a process slot perpendicular to the semi-circle line is vertically formed inthe circular arc surface of the rolling wheel and divides the rolling wheel into structural bodies with the guide slots in two sides. According to the novel rolling wheel for the pipe bending machineprovided by the invention, the rolling wheel forms the stepped rolling wheel with one surface being the circular arc surface and the other surface being provided with the sinking steps, so that the problem that a straight line section is too short to bend is solved, and the product quality is ensured; and particularly, the accuracy class of a bush and the external diameter accuracy class of a high-pressure oil pipe are the same, and the coaxiality of the bush behind a pier head and the high-pressure oil pipe is within 0.03, so that the claim for compensation is reduced, and the competitivenessof enterprises is improved.

Description

technical field [0001] The invention relates to a bending pipe of a high-pressure oil pipe, in particular to a new roller of a pipe bending machine. Background technique [0002] The high-pressure oil pipe is a product with a very short first straight section (the first section contains a bushing), which cannot be guaranteed by the current fixtures. In order to ensure the size of the product, all the bushes are pinched. The main reason is that the accuracy of the bushing and the precision of the high-pressure oil pipe The outer diameter accuracy grade is the same, and the coaxiality between the rear bushing of the pier head and the high-pressure oil pipe is within 0.03. [0003] In order to ensure production, the first section can only be lengthened during the processing, but the reprocessed products do not meet the requirements of the drawings, and the processed products often cause interference and after-sales. Contents of the invention [0004] In order to ensure that ...

AI Technical Summary

Problems solved by technology

[0002] The high-pressure oil pipe is a product with a very short first straight section (the first section contains a bushing), which cannot be guaranteed by the current fixtures. In order to ensure the size of the product, all the bushes are pinched. The main reason is that the accuracy of the bushing and the precision of the high-pressure oil pipe The outer diameter accuracy grade is the same, and the coaxiality between the rear bushing of the pier head and the high-pressure oil pipe is within 0.03

[0003] In order to ensure production, the first section can only be lengthened during the processing, but the reprocessed products do not meet the requirements of the drawings, and the processed products often cause interference and after-sales

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