阅读说明：本技术 一种金属管件弯曲回弹测量装置 (Metal pipe bending resilience measuring device ) 是由 蒋兰芳 林姚辰 黄新敏 张树有 李恒 范家成 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种金属管件弯曲回弹测量装置,包括安装在工作台上的定位模块和处理中心、与所述的定位模块相对安装的测量机构；所述的定位模块包括升降机构和安装在升降机构上的支撑机构；所述的处理中心与测量机构信号相连；本发明模块化设计,操作简单灵活,测量精度高,通用性强。(The invention discloses a metal pipe bending resilience measuring device, which comprises a positioning module, a processing center and a measuring mechanism, wherein the positioning module and the processing center are arranged on a workbench, and the measuring mechanism is arranged opposite to the positioning module; the positioning module comprises a lifting mechanism and a supporting mechanism arranged on the lifting mechanism; the processing center is connected with the measuring mechanism through signals; the invention has the advantages of modular design, simple and flexible operation, high measurement precision and strong universality.)

1. The metal pipe bending resilience measuring device is characterized by comprising a positioning module and a processing center (4) which are arranged on a workbench (302), and a measuring mechanism (1) which is arranged opposite to the positioning module; the positioning module comprises a lifting mechanism (3) and a supporting mechanism (2) arranged on the lifting mechanism (3); the processing center (4) is in signal connection with the measuring mechanism (1);

the measuring mechanism (1) comprises a cross beam (11), a guide rail (12), a sliding block (13), an infrared distance meter (14), an air cylinder body (15), an upper cylinder body cover (16), a lower cylinder body cover (17) and an air cylinder piston (18); wherein both ends of the beam (11) are respectively connected with the upper cover (16) of the cylinder body; the bottom of the cylinder body upper cover (16) is provided with a cylinder body (15), and the bottom of the cylinder body (15) is provided with a cylinder body lower cover (17); the cylinder piston (18) penetrates through the bottom of the cylinder body lower cover (17) and then is installed in the cylinder body (15) of the cylinder; the bottom of the cylinder piston (18) is fixedly connected with the operating platform; crossbeam (11) bottom install guide rail (12), the bottom movable mounting of guide rail (12) have slider (13), slider (13) on install infrared distancer (14).

The supporting mechanism (2) comprises an L-shaped base (21), a clamping plate (22), a bracket guide rail (23) and a tray (24); wherein the tray (24) is provided with a bracket guide rail (23), and the bracket guide rail (23) is provided with an L-shaped base (21); a clamping plate (22) is arranged on the L-shaped base (21), and a torsion spring (211) is arranged in the joint of the L-shaped base (21) and the clamping plate (22);

the lifting mechanism (3) comprises a workbench (302) and a lead screw (31), and the workbench (302) is arranged on the workbench; the workbench (302) is provided with a shell (38), 2 bearings (34), 1 worm wheel (32) and 1 worm (33) are arranged in the shell (38), and the worm wheel (32) is arranged between the 2 bearings (34); the worm wheel (32) is in threaded connection with the worm (33); an upper cover (39) is arranged on the shell (38), and a screw nut (35) is arranged below the workbench (302); the lead screw (31) sequentially penetrates through the upper cover (39), a bearing (34) and a worm wheel (32) in the shell (38), the workbench (302) and the lead screw nut (35) from top to bottom; the screw protective sleeve (303) is sleeved on the screw (31); the worm wheel (32) is in threaded connection with the lead screw (31); the worm (33) is fixedly connected with the handle (36) through an inner hexagonal nut; the handle (36) is provided with a locking device (37), and the locking device (37) is arranged on the outer side wall surface of the shell (38).

2. The metal pipe bending springback measuring device of claim 1, wherein a first dovetail groove (111) for mounting a guide rail (12) is formed at the bottom of a cross beam (11) in the measuring mechanism (1), a second dovetail groove (131) is formed in the middle of the upper surface of a sliding block (13), and dovetails (121) are respectively formed at the upper end and the lower end of the guide rail (12); the second dovetail groove (131) of the sliding block (13) is matched and connected with the lower dovetail (121) of the guide rail (12); the upper end dovetail (121) of the guide rail (12) is matched and connected with the first dovetail groove (111) of the cross beam (11);

one side of the upper part of the cylinder body upper cover (16) is provided with a threaded hole (161), two ends of the cross beam (11) are provided with threads (112), and the threads (112) on the cross beam (11) are in threaded connection with the threaded hole (161) on the cylinder body upper cover (16);

an upper cover mounting platform (162) is mounted at the bottom of the cylinder body upper cover (16), and more than 1 upper cover screw mounting hole (163) is uniformly distributed on the upper cover mounting platform (162); a lower cover mounting platform (172) is mounted at the upper part of the cylinder body lower cover (17), and more than 1 lower cover screw mounting hole (173) is uniformly distributed on the lower cover mounting platform (172); the upper end of the cylinder body (15) is arranged in an upper cover mounting platform (162) of the cylinder body upper cover (16) and is screwed and connected with an upper cover screw mounting hole (163) through a screw, and the lower end of the cylinder body (15) is arranged in a lower cover mounting platform (172) of the cylinder body lower cover (17) and is screwed and connected with a lower cover screw mounting hole (173) through a screw;

a cylinder piston mounting hole (171) is formed in the middle of the bottom of the cylinder body lower cover (17); the upper end of the cylinder piston (18) penetrates through the cylinder piston mounting hole (171) and then is mounted in the cylinder body (15), and the bottom of the cylinder piston (18) is fixedly connected with the operating platform;

a cylindrical infrared distance meter mounting table (132) is mounted in the middle of the lower bottom surface of the sliding block (13), and 2 infrared distance meter threaded mounting holes (133) are formed in the mounting table (132); the infrared distance meter (14) is fixedly connected with an infrared distance meter threaded mounting hole (133) of a cylindrical infrared distance meter mounting table (132) on the sliding block (13) through a screw;

the guide rail (12) is formed by splicing and combining more than 1 guide rail section with equal size;

the guide rail (12) is of a hollow structure;

two air vent holes (151) are formed in the cylinder body (15).

3. The metal pipe bending springback measuring device of claim 1, wherein the inner end of the support guide rail (23) in the support mechanism (2) is provided with a fourth through hole (231), and the outer end is provided with a rectangular groove (232) for mounting the L-shaped base (21);

more than 1 mounting column (241) is mounted on the upper surface of the tray (24), and the upper end of each mounting column (241) is provided with a thread; the center of the lower surface of the tray (24) is provided with a threaded hole (242) for connecting with a thread on a screw rod (31) on the lifting mechanism (3); a datum line (243) for adjusting levelness is arranged on the periphery of the tray (24); the mounting column (241) penetrates through the fourth through hole (231) of the support guide rail (23), and then the thread on the mounting column is screwed with the internal thread of the locking nut (25);

the upper surface of the L-shaped base (21) is provided with a mounting platform (211) of a clamping plate (22) and a fourth mounting hole (212), the middle of the bottom of the L-shaped base (21) is provided with a base mounting column (213), and the outer end of the base mounting column (213) is processed with threads; the clamping plate (22) is hinged with a fourth mounting hole (212) on a mounting platform (211) of the L-shaped base (21) through a pin; the base mounting column (213) penetrates through the rectangular groove (232) of the support guide rail (23), and then the thread on the base mounting column is screwed with the internal thread of the locking nut (25).

4. The metal pipe bending resilience measuring device according to claim 1, wherein more than 1 groove (371) is formed in the end face of the locking device (37) in the lifting mechanism (3), a fixture block (301) is installed in each groove (371), and more than 1 first installation hole (372) fixedly connected with the outer shell (38) is formed in the periphery of the locking device (37); a first through hole (373) for the handle (36) to pass through is formed in the middle of the locking device (37);

the shell (38) comprises a mounting platform (384), a mounting cavity (381) for mounting the bearing (34) and the worm wheel (32) is mounted on the mounting platform (384), and a second through hole (382) for mounting the screw rod (31) is formed in the middle of the mounting cavity (381) of the shell (38); a second mounting hole (383) for mounting the worm (33) is formed in the side edge of the mounting cavity (381), a third through hole (385) fixedly connected with the workbench (302) is formed in the mounting platform (384), and the mounting platform (384) is fixedly connected with the workbench (302) through the third through hole (385) through a screw;

more than 1 third mounting hole (391) is formed in the periphery of the upper cover (39), and the upper cover (39) is fixedly connected with the shell (38) through a screw by utilizing the third through hole (391);

the upper end of the lead screw (31) is provided with a thread (311) matched with the supporting mechanism.

5. A device for measuring the bending springback of a metal pipe as in claim 1, wherein said processing center (4) is connected with infrared distance measuring instruments (14) by wireless signals.

Technical Field

The invention relates to a device for measuring bending precision of a metal bent pipe, in particular to a mechanism for measuring bending resilience of a metal pipe fitting.

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 shape forming springback precision can be measured by 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 metal pipe bending resilience measuring device which is simple to operate, high in modularization degree and high in operating efficiency.

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

a metal pipe bending resilience measuring device comprises a positioning module, a processing center and a measuring mechanism, wherein the positioning module and the processing center are arranged on a workbench, and the measuring mechanism is arranged opposite to the positioning module; the positioning module comprises a lifting mechanism and a supporting mechanism arranged on the lifting mechanism; the processing center is connected with the measuring mechanism through signals;

the measuring mechanism comprises a beam, a guide rail, a sliding block, an infrared distance meter, an air cylinder body, an upper cylinder body cover, a lower cylinder body cover and an air cylinder piston; wherein two ends of the cross beam are respectively connected with the upper cover of the cylinder body; the bottom of the cylinder body upper cover is provided with a cylinder body, and the bottom of the cylinder body is provided with a cylinder body lower cover; the cylinder piston penetrates through the bottom of the lower cover of the cylinder body and is installed in the cylinder body of the cylinder; the bottom of the cylinder piston is fixedly connected with the operating platform; the bottom of the cross beam is provided with a guide rail, the bottom of the guide rail is movably provided with a sliding block, and the sliding block is provided with an infrared distance meter.

The supporting mechanism 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; the L-shaped base is provided with a clamping plate, and a torsional spring is arranged in the joint of the L-shaped base and the clamping plate;

the lifting mechanism comprises a workbench and a lead screw, the workbench is arranged on the operating platform, a shell is arranged on the workbench, 2 bearings, 1 worm wheel and 1 worm are arranged in the shell, and the worm wheel is arranged between the 2 bearings; the worm wheel is in threaded connection with the worm; the shell is provided with an upper cover, and a screw nut is arranged below the workbench; the lead screw sequentially penetrates through the upper cover, a bearing and a worm wheel in the shell, the workbench and the lead screw nut from top to bottom; and the lead screw is sleeved with a lead screw protective sleeve; the worm wheel is in threaded connection with the lead screw; the worm is fixedly connected with the handle through an inner hexagon nut; the handle is provided with a locking device, and the locking device is arranged on the outer side wall surface of the shell.

The bottom of a cross beam in the measuring mechanism is provided with a first dovetail groove for mounting a guide rail, the middle of the upper surface of the sliding block is provided with a second dovetail groove, and the upper end and the lower end of the guide rail are respectively provided with a dovetail; the second dovetail groove of the sliding block is connected with the dovetail at the lower end of the guide rail in a matched manner; the dovetail at the upper end of the guide rail is matched and connected with the first dovetail groove of the cross beam.

One side of the upper part of the cylinder body upper cover is provided with a threaded hole, threads are processed at two ends of the cross beam, and the threads on the cross beam are screwed with the threaded hole on the cylinder body upper cover to be connected.

The bottom of the upper cover of the cylinder body is provided with an upper cover mounting platform, and more than 1 upper cover screw mounting hole is uniformly distributed on the upper cover mounting platform; the upper part of the lower cover of the cylinder body is provided with a lower cover mounting platform, and more than 1 lower cover screw mounting hole is uniformly distributed on the lower cover mounting platform; the upper end of the cylinder body is installed in an upper cover installation platform of the upper cover of the cylinder body and is screwed and connected with an upper cover screw installation hole through a screw, and the lower end of the cylinder body is installed in a lower cover installation platform of the lower cover of the cylinder body and is screwed and connected with a lower cover screw installation hole through a screw.

The middle of the bottom of the lower cover of the cylinder body is provided with a cylinder piston mounting hole; the upper end of the cylinder piston penetrates through the cylinder piston mounting hole and then is mounted in the cylinder body, and the bottom of the cylinder piston is fixedly connected with the operating platform.

A cylindrical infrared distance meter mounting table is mounted in the middle of the lower bottom surface of the sliding block, and 2 infrared distance meter threaded mounting holes are formed in the mounting table; the infrared distance measuring instrument is fixedly connected with an infrared distance measuring instrument threaded mounting hole of the cylindrical infrared distance measuring instrument mounting table on the sliding block through a screw.

The guide rail is formed by splicing and combining more than 1 guide rail section with equal size.

The guide rail is of a hollow structure.

Two air holes are arranged on the cylinder body of the cylinder.

A fourth through hole is formed in the inner end of a support guide rail in the supporting mechanism, and a rectangular groove for mounting the L-shaped base is formed in the outer end of the support guide rail;

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 thread on a screw rod on the lifting mechanism; a datum line for adjusting levelness is arranged on the periphery of the tray; the mounting column penetrates through the fourth 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 of a clamping plate and a fourth mounting hole, 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 provided with a thread; the clamping plate is hinged with a fourth 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.

More than 1 groove is formed in the end face of a locking device in the lifting mechanism, a clamping block is installed in each groove, and more than 1 first installation hole for being fixedly connected with a shell is formed in the periphery of the locking device; the middle of the locking device is provided with a first through hole for the handle to pass through.

The shell comprises an installation platform, an installation cavity for installing a bearing and a worm wheel is installed on the installation platform, and a second through hole for installing a lead screw is formed in the middle in the installation cavity of the shell; the side of the installation cavity is provided with a second installation hole for installing the worm, the installation platform is provided with a third through hole fixedly connected with the workbench, and the installation platform is fixedly connected with the workbench through a screw by utilizing the third through hole.

The periphery of the upper cover is provided with more than 1 third mounting hole, and the upper cover is fixedly connected with the shell through screws by utilizing the third through holes.

The upper end of the screw rod is provided with a thread matched with the supporting mechanism.

The processing center is connected with the infrared distance meter through wireless signals, the processing center is a computer processing system, measured data are received and displayed in a wireless mode, the difference between the measured data and actually required data is calculated through the computer processing system, and the rebound precision is calculated.

The invention has the following beneficial effects:

(1) the guide rail is the combination formula, can measure required motion stroke according to infrared distance meter, increases or reduces the number of guide rail, and the length also can be changed length as required to the length of crossbeam, makes the resilience precision measurement that is fit for different bend radii and bending angle, and easy operation is nimble, and the commonality is strong.

(2) 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.

(3) The guide rail is designed into a hollow structure, and the tray adopts a frame-shaped hollow design, so that the dead weight is reduced, and the stability of the mechanism can be improved; meanwhile, the deformation of the guide rail and the tray can be reduced by light weight, and the measurement precision of the device is improved.

(4) The handle is shaken to drive the worm to transmit to the worm wheel and then to the screw rod, after the height of the screw rod is adjusted to meet the requirement, the clamping block is clamped into one groove of the locking device, and therefore the screw rod is kept at a fixed height, and the measuring accuracy is improved. The handle is fixedly connected with the worm, the worm and the worm wheel are in threaded transmission, and the worm wheel and the lead screw are in threaded transmission, so that the structure is stable. The upper and lower both sides of worm wheel all are provided with the bearing, can improve mechanism operating stability, reduce wearing and tearing simultaneously.

(5) The up-and-down movement of the cylinder body can be realized by controlling the two air vent holes of the cylinder body, so that the up-and-down position of the rebound precision measuring mechanism can be adjusted. The sliding block slides at the bottom of the guide rail to drive the infrared distance measuring instrument to move on the guide rail, so that the horizontal position of the measuring mechanism can be adjusted.

(6) 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. The upper cover is installed above the shell and fixedly connected through the screws so as to prevent dust and other impurities from entering the installation cavity of the worm wheel, and the service life of the mechanism can be prolonged.

Drawings

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

FIG. 2 is an enlarged schematic view of the measuring mechanism of FIG. 1

FIG. 3 is an enlarged schematic view of the support mechanism of FIG. 1

FIG. 4 is an enlarged schematic view of the elevating mechanism of FIG. 1

FIG. 5 is an enlarged view of a portion of the worm gear, lead screw, and worm of FIG. 4;

FIG. 6 is an enlarged schematic view of the cross-beam of FIG. 2;

FIG. 7 is an enlarged schematic view of the guide rail of FIG. 2;

FIG. 8 is an enlarged cross-sectional view of the slider of FIG. 2;

FIG. 9 is an enlarged cross-sectional view of the upper cover of the cylinder in FIG. 2;

FIG. 10 is an enlarged cross-sectional view of the lower cylinder head of FIG. 2;

FIG. 11 is an enlarged cross-sectional view of the tray of FIG. 3;

FIG. 12 is an enlarged cross-sectional view of the L-shaped base of FIG. 3;

FIG. 13 is a schematic view of the locking device of FIG. 4;

FIG. 14 is a schematic view of the structure of the housing of FIG. 4;

fig. 15 is a schematic view of the structure of the lead screw of fig. 4.

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 device for measuring the bending resilience of the metal pipe fitting comprises a positioning module and a processing center 4 which are arranged on a workbench 302, and a measuring mechanism 1 which is arranged opposite to the positioning module, as shown in fig. 1-15; the positioning module comprises a lifting mechanism 3 and a supporting mechanism 2 arranged on the lifting mechanism 3; the processing center 4 is connected with the measuring mechanism through signals;

the measuring mechanism 1 comprises a beam 11, a guide rail 12, a slide block 13, an infrared distance meter 14, a cylinder body 15, a cylinder body upper cover 16, a cylinder body lower cover 17 and a cylinder piston 18; wherein both ends of the beam 11 are respectively connected with the cylinder body upper cover 16; the bottom of the cylinder body upper cover 16 is provided with a cylinder body 15, and the bottom of the cylinder body 15 is provided with a cylinder body lower cover 17; the cylinder piston 18 penetrates through the bottom of the cylinder body lower cover 17 and is installed in the cylinder body 15 of the cylinder; the bottom of the cylinder piston 18 is fixedly connected with the operating platform; the bottom of the beam 11 is provided with a guide rail 12, the bottom of the guide rail 12 is movably provided with a sliding block 13, and the sliding block 13 is provided with an infrared distance meter 14.

The supporting mechanism 2 comprises an L-shaped base 21, a clamping plate 22, a bracket guide rail 23 and a tray 24; wherein the tray 24 is provided with a bracket guide rail 23, and the bracket guide rail 23 is provided with an L-shaped base 21; a clamping plate 22 is arranged on the L-shaped base 21, and a torsion spring 211 is arranged in the joint of the L-shaped base 21 and the clamping plate 22 to provide clamping force;

the lifting mechanism 3 comprises a workbench 302 and a lead screw 31, the workbench 302 is arranged on the workbench, a shell 38 is arranged on the workbench 302, 2 bearings 34, 1 worm wheel 32 and 1 worm 33 are arranged in the shell 38, and the worm wheel 32 is arranged between the 2 bearings 34; the worm wheel 32 is in threaded connection with the worm 33; an upper cover 39 is arranged on the shell 38, and a screw nut 35 is arranged below the workbench 302; the lead screw 31 sequentially passes through the upper cover 39, the bearing 34 and the worm gear 32 in the shell 38, the workbench 302 and the lead screw nut 35 from top to bottom; the lead screw 31 is sleeved with a lead screw protective sleeve 303; the worm wheel 32 is in threaded connection with the lead screw 31; the worm 33 is fixedly connected with the handle 36 through an inner hexagon nut; the handle 36 is provided with a locking device 37, and the locking device 37 is arranged on the outer side wall surface of the shell 38.

The bottom of a cross beam 11 in the measuring mechanism 1 is provided with a first dovetail groove 111 for mounting a guide rail 12, the middle of the upper surface of a sliding block 13 is provided with a second dovetail groove 131, and the upper end and the lower end of the guide rail 12 are respectively provided with a dovetail 121; the second dovetail groove 131 of the sliding block 13 is matched and connected with the lower dovetail 121 of the guide rail 12; the upper end dovetail 121 of the guide rail 12 is connected with the first dovetail groove 111 of the cross beam 11 in a matching manner.

A threaded hole 161 is formed in one side of the upper portion of the cylinder body upper cover 16, threads 112 are formed in two ends of the cross beam 11, and the threads 112 on the cross beam 11 are in threaded connection with the threaded hole 161 on the cylinder body upper cover 16.

An upper cover mounting platform 162 is mounted at the bottom of the cylinder body upper cover 16, and 2 upper cover screw mounting holes 163 are uniformly distributed on the upper cover mounting platform 162; a lower cover mounting platform 172 is mounted on the upper part of the cylinder body lower cover 17, and 4 lower cover screw mounting holes 173 are uniformly distributed on the lower cover mounting platform 172; the upper end of the cylinder body 15 is installed in the upper cover installation platform 162 of the cylinder body upper cover 16 and screwed with the upper cover screw installation hole 163 through a screw, and the lower end of the cylinder body 15 is installed in the lower cover installation platform 172 of the cylinder body lower cover 17 and screwed with the lower cover screw installation hole 173 through a screw.

A cylinder piston mounting hole 171 is formed in the middle of the bottom of the cylinder body lower cover 17; the upper end of the cylinder piston 18 passes through the cylinder piston mounting hole 171 and then is mounted in the cylinder body 15, and the bottom of the cylinder piston 18 is fixedly connected with the operating platform.

A cylindrical infrared distance meter mounting table 132 is mounted in the middle of the lower bottom surface of the sliding block 13, and 2 infrared distance meter threaded mounting holes 133 are formed in the mounting table 132; the infrared distance measuring instrument 14 is fixedly connected with the infrared distance measuring instrument threaded mounting hole 133 of the cylindrical infrared distance measuring instrument mounting table 132 on the sliding block 13 through a screw.

The guide rail 12 is formed by splicing and combining more than 1 guide rail section with equal size.

The guide rail 12 is a hollow structure.

The cylinder block 15 is provided with two ventilation holes 151.

A fourth through hole 231 is formed at the inner end of the support guide rail 23 in the support mechanism 2, and a rectangular groove 232 for mounting the L-shaped base 21 is formed at the outer end;

3 mounting columns 241 are mounted on the upper surface of the tray 24, and the upper ends of the mounting columns 241 are provided with threads; the center of the lower surface of the tray 24 is provided with a threaded hole 242 for connecting with the thread on the screw rod 31 on the lifting mechanism 3; a reference line 243 for adjusting levelness is arranged on the periphery of the tray 24; the mounting post 241 is screwed with the internal thread of the locking nut 25 after passing through the fourth through hole 231 of the bracket guide rail 23;

the upper surface of the L-shaped base 21 is provided with an installation platform 211 and a fourth installation hole 212 of the clamping plate 22, the middle of the bottom of the L-shaped base 21 is provided with a base installation column 213, and the outer end of the base installation column 213 is processed with threads; the clamping plate 22 is hinged with a fourth mounting hole 212 on the mounting platform 211 of the L-shaped base 21 through a pin; the base mounting column 213 is screwed with the internal thread of the lock nut 25 after passing through the rectangular groove 232 of the bracket rail 23.

3 grooves 371 are formed in the end face of the locking device 37 in the lifting mechanism 3, a fixture block 301 is installed in each groove 371, the fixture block 301 is clamped in one groove 271 of the locking device 37, and the position of the handle 36 is fixed, so that the screw rod 31 is kept at a fixed height; 4 first mounting holes 372 fixedly connected with the shell 38 are formed in the periphery of the locking device 37; the middle of the locking device 37 is provided with a first through hole 373 through which the handle 36 passes.

The shell 38 comprises a mounting platform 384, a mounting cavity 381 for mounting the bearing 34 and the worm gear 32 is mounted on the mounting platform 384, and a second through hole 382 for mounting the screw rod 31 is formed in the middle of the mounting cavity 381 of the shell 38; the side of the installation cavity 381 is provided with a second installation hole 383 for installing the worm 33, the installation platform 384 is provided with a third through hole 385 fixedly connected with the workbench 302, and the installation platform 384 is fixedly connected with the workbench 302 through a screw by the third through hole 385.

The periphery of the upper cover 39 is provided with 4 third mounting holes 391, and the upper cover 39 is fixedly connected with the shell 38 through the third mounting holes 391 by screws.

The upper end of the screw rod 31 is provided with a thread 311 matched with the supporting mechanism.

The processing center 4 is connected with the infrared distance meter 14 through wireless signals, the processing center 4 is a computer processing system, measured data are received wirelessly and displayed, the difference between the measured data and actually required data is calculated through the computer processing system, and the rebound precision is calculated.

When the installation and debugging are carried out, the debugging supporting mechanism 2 is firstly installed. Firstly, uniformly arranging 3 support guide rails 23 on the tray 24, then adjusting the positions of the support guide rails 23 on the tray 24 according to the bending angle of the metal bent pipe 5 to be supported and positioned, and pre-tightening; secondly, installing the L-shaped base 21 on the support guide rail 23, installing the clamping plates 22 on the L-shaped bases 21 at two sides, and preliminarily adjusting the position of the L-shaped base 21 on the support guide rail 23 according to the bending radius of the metal bent pipe 5 to be supported and positioned, and pre-tightening; then placing the metal bent pipe 5 to be measured on the L-shaped base 21, adjusting the installation angle of the support guide rail 23 and the installation position of the L-shaped base 21, so that the bent section of the metal bent pipe 5 to be measured is placed on the middle L-shaped base 21, and the two straight line sections are respectively positioned on the L-shaped bases 21 of the other two clamping plates 22, so that the clamping plates 22 clamp the metal bent pipe 5; after the adjustment is completed, the screw thread on the base mounting column 213 of the L-shaped base 21 is screwed with the lock nut 25.

The lifting mechanism 3 is then commissioned. The support mechanism 2 is engaged with the screw 311 of the screw 31 of the elevating mechanism 3 through a screw hole 242 in the center of the lower surface of the tray 24. The handle 36 is shaken, the handle 36 is connected with the worm 33, the worm 33 is in threaded transmission with the worm wheel 32, the worm wheel 32 is in threaded transmission with the lead screw 31, and therefore the height of the supporting mechanism 2 connected with the lead screw and the direction of the bending center angle of the elbow are adjusted; when the supporting mechanism 2 reaches a certain height and the bending central angle position of the bent pipe 5 to be measured is opposite to the measuring mechanism 1, the fixture block 301 is clamped into one groove 371 of the locking device 37, so that the supporting mechanism 2 is kept at a certain height, and the measuring accuracy is improved.

The measuring device 1 is readjusted. Firstly, respectively adjusting the heights of the cylinder bodies 15 on the two sides, and simultaneously sliding the sliding block 13 to enable the infrared distance measuring instrument 14 to be aligned to the reference line 243 of the tray 24, so that the cross beam 11 and the guide rail 12 are in a horizontal state; then, the cylinder bodies 15 of the air cylinders on the two sides are adjusted simultaneously, so that the height of the infrared distance measuring instrument 14 is consistent with the height of the central line of the metal bent pipe 5 to be measured. The length of the guide rail 12 is then adjusted so that the length of the guide rail 12 satisfies the movement stroke of the infrared distance meter 14.

And starting measurement after debugging is finished. The slider 13 slides from one side of the bent metal pipe 5 to be measured to the other side, and the infrared distance meter 14 scans the distance on the central line of the inner side of the bent metal pipe 5 to measure the bending radius and the bending angle of the bent metal pipe 5, and transmits the data to the processing center 4, and the data is compared with the bending radius and the bending angle of the bent metal pipe 5 actually required, so that the bending radius rebound value and the bending angle rebound value of the bent metal pipe 5, namely the bending rebound precision, can be obtained.

The utility model provides a crooked resilient measurement device of metal pipe fitting, wherein the guide rail is the combination formula, can measure required motion stroke according to infrared distance meter, increases or reduces the number of guide rail, and the length also can be changed as required to the length of crossbeam, makes the resilience precision measurement that is fit for different bend radius and bend angle, and easy operation is nimble, and the commonality is strong. The installation angle of the second 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. The third guide rail is designed into a hollow structure, and the tray is in a frame type hollow design, so that the dead weight is reduced, and the stability of the mechanism can be improved; meanwhile, the deformation of the guide rail and the tray can be reduced by light weight, and the measurement precision of the device is improved. And fourthly, the handle is shaken to drive the worm to transmit to the worm wheel and then to the screw rod, after the height of the screw rod is adjusted to meet the requirement, the fixture block is clamped into one groove of the locking device, and therefore the screw rod is kept at a fixed height to improve the measurement precision. The handle is fixedly connected with the worm, the worm and the worm wheel are in threaded transmission, and the worm wheel and the lead screw are in threaded transmission, so that the structure is stable. The upper and lower both sides of worm wheel all are provided with the bearing, can improve mechanism operating stability, reduce wearing and tearing simultaneously. Fifthly, the up-and-down movement of the cylinder body can be realized by controlling the two air vent holes of the cylinder body, so that the up-and-down position of the rebound precision measuring mechanism can be adjusted. The sliding block slides at the bottom of the guide rail to drive the infrared distance measuring instrument to move on the guide rail, so that the horizontal position of the measuring mechanism can be adjusted. The sixth 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. The upper cover is installed above the shell and fixedly connected through the screws so as to prevent dust and other impurities from entering the installation cavity of the worm wheel, and the service life of the mechanism can be prolonged.