阅读说明：本技术 一种金属弯管回弹测量用支撑机构 (Supporting mechanism for metal bent pipe springback measurement ) 是由 蒋兰芳 范家成 顾国斌 巩安武 刘奇 于 2019-10-17 设计创作，主要内容包括：本发明提供了一种金属弯管回弹测量用支撑机构,包括L型底座、夹板、支架导轨和托盘；其中所述的托盘上安装有支架导轨,所述的支架导轨上安装有L型底座；所述的L型底座上安装有夹板,且所述的L型底座与夹板连接处内置有扭簧。本发明操作简单灵活,通用性强。(The invention provides a supporting mechanism for measuring resilience of a metal bent pipe, which comprises an L-shaped base, a clamping plate, a bracket guide rail and a tray, wherein the L-shaped base is provided with a plurality of clamping plates; the tray is provided with a bracket guide rail, and the bracket guide rail is provided with an L-shaped base; l type base on install splint, just L type base and splint junction built-in have the torsional spring. The invention has simple and flexible operation and strong universality.)

1. A supporting mechanism for metal bent pipe springback measurement is characterized by comprising an L-shaped base (1), a clamping plate (2), a bracket guide rail (3) and a tray (4); wherein the tray (4) is provided with a bracket guide rail (3), and the bracket guide rail (3) is provided with an L-shaped base (1); l type base (1) on install splint (2), just L type base (1) and splint (2) junction built-in have torsional spring (21).

2. The support mechanism for measuring the springback of the metal bent pipe according to claim 1, wherein the inner end of the support guide rail (3) is provided with a mounting through hole (31), and the outer end of the support guide rail (3) is provided with a rectangular groove (32) for mounting the L-shaped base (1);

more than 1 mounting column (41) is mounted on the upper surface of the tray (4), and the upper end of each mounting column (41) is provided with a thread; the center of the lower surface of the tray (4) is provided with a threaded hole (42) for connecting with a lifting mechanism; a reference line (43) for adjusting levelness is arranged on the periphery of the tray (4); the mounting column (41) penetrates through the mounting through hole (31) of the support guide rail (3), and then the thread on the mounting column is screwed with the internal thread of the locking nut (5);

the upper surface of the L-shaped base (1) is provided with an installation platform (11) and an installation hole (12) of the clamping plate (2), the middle of the bottom of the L-shaped base (1) is provided with a base installation column (13), and the outer end of the base installation column (13) is processed with threads; the clamping plate (2) is hinged with a mounting hole (12) on a mounting platform (11) of the L-shaped base (1) through a pin; the base mounting column (13) penetrates through the rectangular groove (32) of the support guide rail (3), and then the thread on the base mounting column is connected with the internal thread of the locking nut (5) in a screwing mode.

Technical Field

The invention relates to a supporting mechanism for measuring resilience of a metal bent pipe.

Background

The metal pipe fitting is bent and formed by determining a reasonable fulcrum and a stress point and applying a certain bending moment or bending force. In the pipe bending forming process, the outer side of the bending deformation area is subjected to tangential tensile stress, and the pipe wall is thinned and even cracked; the inner side is stressed by tangential pressure, the pipe wall is thickened, and even unstability and wrinkling are caused; the resultant force of the two generates a radially inward compressive stress, which causes the cross section to flatten and distort, even collapse. After unloading, the spring back phenomenon is generated due to the residual stress in the bent pipe and the recovery of elastic deformation. Therefore, the problems of tension cracking, wrinkling, cross section distortion, resilience and the like are easily caused in the pipe bending forming process, and the method is a complex forming process with multiple forming defects.

When the metal bent pipe is applied to different fields, the forming performance indexes of the metal bent pipe, such as wall thickness reduction rate, wall thickness thickening rate, fold degree, ovality, resilience precision and the like, have corresponding standards or requirements. After each metal pipe fitting is bent and formed, the relevant forming performance indexes of the metal pipe fitting are measured. The springback precision of the bent pipe can be measured by means of special equipment such as a 3D global coordinate measuring instrument, but the cost is high, and a special clamp needs to be designed. Manual positioning measurement can also be adopted, but the precision is not high and the efficiency is low.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the support mechanism for measuring the springback of the metal bent pipe, which is simple to operate, high in modularization degree and high in operation efficiency.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a supporting mechanism for measuring resilience of a metal bent pipe comprises an L-shaped base, a clamping plate, a bracket guide rail and a tray; the tray is provided with a bracket guide rail, and the bracket guide rail is provided with an L-shaped base; l type base on install splint, just L type base and splint junction built-in have the torsional spring.

The inner end of the bracket guide rail is provided with a mounting through hole, and the outer end of the bracket guide rail (3) is provided with a rectangular groove for mounting the L-shaped base;

more than 1 mounting column is mounted on the upper surface of the tray, and the upper end of each mounting column is provided with a thread; the center of the lower surface of the tray is provided with a threaded hole for connecting with a lifting mechanism; a datum line for adjusting levelness is arranged on the periphery of the tray; the mounting column penetrates through the mounting through hole of the support guide rail, and then the thread on the mounting column is screwed with the internal thread of the locking nut;

the upper surface of the L-shaped base is provided with a mounting platform and a mounting hole of the clamping plate, the middle of the bottom of the L-shaped base is provided with a base mounting column, and the outer end of the base mounting column is processed with threads; the clamping plate is hinged with the mounting hole on the mounting platform of the L-shaped base through a pin; and the base mounting column penetrates through the rectangular groove of the support guide rail, and then the thread on the base mounting column is screwed with the internal thread of the locking nut.

The invention has the following beneficial effects:

(1) the installation angle of the bracket guide rail and the tray can be adjusted at will, so that the device can be suitable for measuring the resilience precision of the bent pipe with any bending angle; because the outer end is processed with the rectangular channel, the mounting position of the L-shaped base on the support guide rail is adjustable, and the device is suitable for measuring the resilience precision of bent pipes with different bending radiuses.

(2) The torsional spring provides the clamp force, makes splint press from both sides tight measuring return bend, prevents that the return bend from sliding, improves measurement accuracy.

(3) The tray adopts frame type fretwork design, alleviates the dead weight, can improve the stability of mechanism, improves the support accuracy of mechanism.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged cross-sectional view of the tray of the present invention;

fig. 3 is an enlarged sectional view of the L-shaped base in the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent, and the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The supporting mechanism for measuring the resilience accuracy of the metal bent pipe in the embodiment is shown in fig. 1-3, and comprises an L-shaped base 1, a clamping plate 2, a bracket guide rail 3 and a tray 4; wherein the tray 4 is provided with a bracket guide rail 3, and the bracket guide rail 3 is provided with an L-shaped base 1; l type base 1 on install splint 2, just L type base 1 and splint 2 junction built-in have torsional spring 21, provide the clamp force.

The inner end of the support guide rail 3 is provided with a mounting through hole 31, and the outer end of the support guide rail 3 is provided with a rectangular groove 32 for mounting the L-shaped base 1;

3 mounting columns 41 are mounted on the upper surface of the tray 4, and threads are machined at the upper ends of the mounting columns 41; the center of the lower surface of the tray 4 is provided with a threaded hole 42 for connecting with a lifting mechanism; a reference line 43 for adjusting levelness is arranged on the periphery of the tray 4; the mounting column 41 passes through the mounting through hole 31 of the bracket guide rail 3, and then the thread on the mounting column is screwed with the internal thread of the locking nut 5;

the upper surface of the L-shaped base 1 is provided with an installation platform 11 and an installation hole 12 of the clamping plate 2, the middle of the bottom of the L-shaped base 1 is provided with a base installation column 13, and the outer end of the base installation column 13 is provided with threads; the clamping plate 2 is hinged with a mounting hole 12 on a mounting platform 11 of the L-shaped base 1 through a pin; the base mounting column 13 passes through the rectangular groove 32 of the bracket guide rail 3, and the thread on the base mounting column is screwed with the internal thread of the locking nut 5.

During installation and debugging, firstly, 3 support guide rails 3 are uniformly arranged on the tray 4, and then the positions of the support guide rails 3 on the tray 4 are adjusted according to the bending angle of the metal bent pipe 6 to be supported and positioned, and pre-tightened; secondly, the L-shaped base 1 is arranged on the support guide rail 3, the clamping plates 2 are arranged on the L-shaped bases 1 on the two sides, and the position of the L-shaped base 1 on the support guide rail 3 is preliminarily adjusted and pre-tightened according to the bending radius of the metal bent pipe 6 to be supported and positioned; then placing the metal bent pipe 6 to be measured on the L-shaped base 1, adjusting the installation angle of the support guide rail 3 and the installation position of the L-shaped base 1, so that the bent section of the metal bent pipe 6 to be measured is placed on the middle L-shaped base 1, and the two straight line sections are respectively positioned on the L-shaped bases 1 of the other two clamping plates 2, so that the metal bent pipe 6 is clamped by the clamping plates 2; after the adjustment is finished, the threads on the base mounting column 13 of the L-shaped base 1 are screwed with the locking nut 5. Namely the installation and debugging of the complete supporting mechanism.

In the embodiment, the installation angle of the bracket guide rail and the tray can be adjusted at will, so that the device can be suitable for the rebound measurement of the bent pipe with any bending angle; because the outer end is processed with the rectangular channel, the mounting position of the L-shaped base on the support guide rail is adjustable, thereby being suitable for the rebound measurement of bent pipes with different bending radiuses. Secondly the torsional spring provides the clamp force, makes splint press from both sides tight the measuring return bend, prevents that the return bend from sliding, can improve measurement accuracy. The third tray adopts frame type fretwork design, alleviates the dead weight, can improve the stability of mechanism, improves the support accuracy of mechanism.