Positioning device and induction hardening equipment for straight round pipe fitting

Abstract

A positioning device for a straight round pipe fitting comprises a positioning device main body provided with a first positioning mechanism, a second positioning mechanism and a third positioning mechanism, wherein respective positioning parts of the first positioning mechanism, the second positioning mechanism and the third positioning mechanism are distributed in the circumferential direction of the same arrangement circumference and can be in contact with the inner peripheral surface or the outer peripheral surface of a straight round pipe fitting (7) in the radial direction of the arrangement circumference; and all the positioning parts can slide and / or roll when the straight round pipe fitting and the positioning device for the straight round pipe fitting move relative to each other. Besides, the invention also provides induction hardening equipment for the straight round pipe fitting, which is equipped with the positioning device for the straight round pipe fitting. The positioning device for the straight round pipe fitting, provided by the invention, can optimally enable the circumferential gap between the wall of the straight round pipe fitting and a hardening inductor to be uniformly the same as much as possible, so that the induced magnetic field intensity in the pipe wall can be uniformly distributed in the circumferential direction, a relatively uniform hardening layer can be effectively formed and the hardening quality is remarkably improved.

Description

technical field [0001] The invention relates to an auxiliary device for processing straight round pipe fittings, in particular to a positioning device for straight round pipe fittings. In addition, the present invention also relates to induction hardening equipment for straight round pipe fittings installed with the positioning device for straight round pipe fittings. Background technique [0002] Straight round pipe fittings are widely used in various fields. According to application needs, straight round pipe fittings are required to have good wear resistance and certain toughness in many cases, such as concrete conveying pipes for conveying concrete, conveying pipes for conveying dust, etc. , so these straight round pipes need a certain heat treatment. [0003] For example, due to the popularity of mechanized construction such as urban construction and roads and bridges, towed concrete pumps and concrete pump trucks used for concrete transportation have become important ...

AI Technical Summary

Problems solved by technology

Based on the above phenomenon, the induction current in the pipe wall is unevenly distributed, resulting in uneven wall thickness of the pipe being heated and resulting in uneven quenching layer, which seriously affects the processing quality of straight round pipe fittings.

This kind of defect existing in the induction hardening process of straight round pipe fittings has been unable to be effectively solved for a long time, and it has constituted a difficult technical problem in this field

This technical problem cannot be solved simply by adding, for example, a third support mechanism to form a three-point support. Specifically, since the quenching inductor 6 is in a fixed position during the induction hardening process, and the straight round pipe 7 is relative to the quenching inductor 6. Axial movement and circumferential rotation. First, due to the two-point support form, the straight round pipe 7 will form concave deformations of different degrees due to its own weight. When this concave deformation part passes through the quenching inductor 6, it will cause straight round The distance between the inner wall of the pipe fitting 7 and the quenching sensor 6 is not uniform; secondly, there will be a certain degree of shape and position tolerance (such as straightness) in the straight round pipe fitting 7 during the processing and forming process (such as hot gadolinium), and this shape and position tolerance despite Smaller, but it cannot be ignored for the induction hardening process. Although the straight round pipe is still circular in each section, due to its shape and position tolerance, when each part of the straight round pipe 7 passes through the quenching inductor 6, it must be It will cause uneven spacing between the inner wall of the straight round pipe fitting 7 and the quenching inductor 6. This form and position tolerance such as straightness caused by the processing technology cannot be solved simply by adding a support mechanism; thirdly, the straight round pipe fitting 7 During the heating process of induction hardening, microscopic deformation will also occur to a certain extent, such as thermal expansion, etc., which will obviously also affect the uniformity of the circumferential interval between the inner wall of the straight round pipe 7 and the quenching inductor 6

These factors directly lead to the serious unevenness of the quenched layer formed on the inner wall of the straight round pipe fitting 7, and the mismatch of wear resistance and toughness, seriously impairing the processing quality of the straight round pipe fitting 7, making the straight round pipe fitting 7 easy to be scrapped during use, increasing the cost

[0010] In addition, some related figure 1 The induction hardening equipment for straight round pipe fittings shown is similar to the induction hardening equipment or the corresponding straight round pipe fitting support mechanism. Cylindrical pipe fittings and their production methods and special equipment, but these existing technologies cannot solve the above-mentioned technical defects at all due to different technical issues of concern

Images