A metal pipe cross-section distortion measuring mechanism

Abstract

The invention discloses a metal bend pipe cross-section distortion measuring mechanism, comprising a bottom plate, on which a measuring mechanism consisting of a metal bend pipe cross-section short axis measuring mechanism and a metal bend pipe surface long axis measuring mechanism is installed. The invention has the advantages of simple operation, stable structure, high positioning accuracy and strong versatility.

Description

Technical Field

[0001] The invention relates to a metal bent pipe cross-section distortion measuring mechanism. Background Art

[0002] Metal pipes are bent and formed by determining reasonable fulcrums and stress points and applying a certain bending moment or bending force. During the bending process of pipes, the outer side of the bending deformation zone is subjected to tangential tensile stress, the pipe wall is thinned, or even cracked; the inner side is subjected to tangential compressive stress, the pipe wall is thickened, or even unstable and wrinkled; the combined force of the two produces radial inward compressive stress, which flattens and deforms the cross section, or even collapses. After unloading, the residual stress inside the bent pipe and the recovery of elastic deformation cause rebound. It can be seen that problems such as cracking, wrinkling, cross-sectional distortion and rebound are prone to occur during the bending process of pipes. It is a complex forming process with multiple forming defects.

[0003] When metal pipe bending is used in different fields, there are corresponding standards or requirements for its forming performance indicators, such as wall thickness thinning rate, wall thickness thickening rate, wrinkle degree, ovality and rebound accuracy. After each metal pipe is bent and formed, the relevant forming performance indicators must be measured. Among them, the cross-sectional distortion of the bent pipe can be measured by special equipment such as 3D global coordinate measuring instrument, but the cost is high and special fixtures need to be designed. Manual positioning measurement can also be used, but the accuracy is not high and the efficiency is low. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a metal bent pipe cross-section distortion measuring mechanism which has simple operation, high modularization degree and high operating efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A metal bend pipe cross-section distortion measuring mechanism comprises a bottom plate, on which a measuring mechanism consisting of a metal bend pipe cross-section minor axis measuring mechanism and a metal bend pipe surface major axis measuring mechanism is installed.

[0007] The metal elbow section short axis measuring mechanism comprises a moving slider installed on the bottom plate, a second motor is installed on the moving slider, and the output shaft of the second motor is connected to the gear; a rack is installed on the bottom plate, and the rack is meshed and connected to the gear; a push rod is installed at the middle position of the front end of the moving slider, a first infrared probe is installed on the push rod, and a reference rod is installed on the bottom plate at a position opposite to the first infrared probe;

[0008] The metal bent pipe surface long axis measuring mechanism includes a third motor installed at the bottom of the base plate, and the third motor is connected to a screw through a coupling; the screw is threadedly connected through an internal threaded bearing installed on the height measuring plate; a second infrared probe is installed at the bottom of the height measuring plate; the compass rod on the base plate passes through the height measuring plate and is located on the upper surface of the height measuring plate.

[0009] The movable slider of the metal bent pipe cross-section short axis measuring mechanism comprises a rectangular slider body, a boss is integrally formed and installed in the middle position of the rectangular slider body, slider columns are integrally formed and installed at both ends of the bottom of the rectangular slider body, a push rod installation through hole and a locking screw installation hole are provided on the boss; a slide rail installation hole is provided on the slider column; a motor installation hole is provided on the upper surface of the rectangular slider body; a second motor is installed on the rectangular slider body through the motor installation hole and screws;

[0010] The bottom of the top rod is provided with an infrared probe mounting hole and a positioning locking hole; a first infrared probe is installed in the infrared probe mounting hole;

[0011] The marking rod is made of a first cylinder at the upper end, a second cylinder in the middle and a semi-cylinder at the lower end. The lower end of the semi-cylinder is provided with a plane used as a ranging target surface for an infrared probe. The second semi-cylinder above the plane is provided with a thread, and a key is installed on the top of the second semi-cylinder.

[0012] The height measuring plate on the long axis measuring mechanism of the metal curved pipe surface is provided with an internal thread bearing mounting hole, a marking rod mounting through hole, and a top rod moving sliding groove of the short axis measuring mechanism.

[0013] A motor mounting platform is installed on the lower bottom surface at the middle position of the base plate, and a motor mounting step hole and a coupling mounting hole are provided on the base plate and the motor mounting platform, and the coupling mounting hole is located in the middle of the motor mounting step hole; a top rod moving track is provided at the bottom surface position on one side of the two sides of the motor mounting platform on the base plate along the length direction of the base plate, and a slider moving groove is provided on both sides of the top rod moving track along the length direction of the base plate, and a rack mounting platform is provided on the outer side of the slider moving groove along the length direction of the base plate; a reference rod mounting key groove is also provided on the base plate near the middle position, and the reference rod mounting key groove and the top rod moving track are provided in a straight line in the length direction of the base plate; a slide rail mounting frame is provided at the bottom of the base plate, and the slide rail mounting frame is installed at the end point positions in the length direction of the sliding block slide groove and the end point positions in the length direction of the sliding block sliding groove; a slide rail mounting through hole is provided on the slide rail mounting frame; a slide rail is installed in the slide rail mounting through hole.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The movement of the slider drives the infrared probe at the bottom of the push rod to focus on the reference rod to measure the short axis length of the curved pipe section. The structure is stable and the operation is simple.

[0016] (2) The moving slide block is driven by a dual motor and then by a gear rack, and the structure is stable and reliable. The height of the push rod and the guide rod can be changed and adjusted according to the outer diameter of the metal elbow to be measured. The operation is simple and the versatility is strong.

[0017] (3) The motor drives the screw to rotate, and the screw is connected to the height measuring plate through an internal threaded bearing, thereby driving the change in the height of the infrared probe on the height measuring plate, thereby realizing the height adjustment of the infrared probe and the measurement of the long axis of the cross section, with a stable structure and simple operation.

[0018] (4) The reference rod constrains the rotational freedom of the height measuring plate, leaving only its sliding freedom, thereby achieving height adjustment of the height measuring plate, and the structure is stable and reliable. The length of the height measuring plate can be changed and adjusted according to the outer diameter of the metal elbow to be measured, which is simple to operate and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 yes Figure 1 The enlarged structural diagram of the short axis measuring mechanism after the elbow is removed;

[0021] Figure 3 yes Figure 1 An enlarged schematic diagram of the bottom surface of the bottom plate of the short axis measuring mechanism after the elbow is removed;

[0022] Figure 4 yes Figure 1 The enlarged structural diagram of the long axis measuring mechanism after the elbow is removed;

[0023] Figure 5 yes Figure 1 An enlarged schematic diagram of the bottom surface of the bottom plate of the long axis measuring mechanism after the elbow is removed;

[0024] Figure 6 yes Figure 2 An enlarged schematic diagram of the moving slider in FIG.

[0025] Figure 7 yes Figure 2 An enlarged schematic diagram of the middle push rod;

[0026] Figure 8 yes Figure 2 An enlarged schematic diagram of the center mark direction rod;

[0027] Fig. 9 yes Figure 4 Schematic diagram of the structure of the middle height plate;

[0028] Fig.10 yes Figure 1 Schematic diagram of the base plate structure. DETAILED DESCRIPTION

[0029] A metal bent pipe cross-section distortion measuring mechanism according to this embodiment, such as Figure 1-10 As shown, it includes a base plate 5, on which a measuring mechanism consisting of a metal bend pipe cross-section short axis measuring mechanism 1 and a metal bend pipe surface long axis measuring mechanism 2 is installed.

[0030] The metal elbow section short axis measuring mechanism 1 comprises a moving slider 11 mounted on the bottom plate 5, a second motor 18 is mounted on the moving slider 11, and the output shaft of the second motor 18 is connected to the gear 15; a rack 16 is mounted on the bottom plate 5, and the rack 16 is meshed and connected to the gear 15; a push rod 12 is mounted at the middle position of the front end of the moving slider 11, a first infrared probe 13 is mounted on the push rod 12, and a guide rod 14 is mounted on the bottom plate 5 at a position opposite to the first infrared probe 13;

[0031] The metal bend pipe surface long axis measuring mechanism 2 includes a third motor 26 installed at the bottom of the base plate 5, and the third motor 26 is connected to the screw 23 through a coupling 25; the screw 23 is threadedly connected through an internal threaded bearing 24 installed on the height measuring plate 21; a second infrared probe 22 is installed at the bottom of the height measuring plate 21; the compass rod 14 on the base plate 5 passes through the height measuring plate 21 and is located on the upper surface of the height measuring plate 21.

[0032] The movable slider 11 of the metal bent pipe cross-section short axis measuring mechanism 1 comprises a rectangular slider body 116, a boss 117 is integrally formed and installed in the middle position of the rectangular slider body 116, slider columns 113 are integrally formed and installed at both ends of the bottom of the rectangular slider body 116, and a push rod mounting through hole 111 and a locking screw mounting hole 112 are provided on the boss 117; a slide rail mounting hole 114 is provided on the slider column 113; a motor mounting hole 115 is provided on the upper surface of the rectangular slider body 116; a second motor 18 is installed on the rectangular slider body 116 through the motor mounting hole 115 and screws;

[0033] The bottom of the push rod 12 is provided with an infrared probe mounting hole 121 and a positioning locking hole 122; the first infrared probe 13 is installed in the infrared probe mounting hole 121;

[0034] The marking rod 14 is made of an integral body of a first cylinder 141 at the upper end, a second cylinder 142 in the middle and a semi-cylinder 143 at the lower end. A plane 144 serving as a ranging target surface for an infrared probe is provided at the lower end of the semi-cylinder 143. A thread 145 is provided on the second semi-cylinder 142 above the plane 144. A key 146 is installed on the top of the second semi-cylinder 142.

[0035] The height measuring plate 21 on the metal pipe bending surface long axis measuring mechanism 2 is provided with an internal thread bearing mounting hole 211 , a guide rod mounting through hole 212 , and a push rod moving slide groove 213 of the short axis measuring mechanism 1 .

[0036] A motor mounting platform 59 is installed on the lower bottom surface at the middle position of the bottom plate 5, and a motor mounting stepped hole 591 and a coupling mounting hole 592 are provided through the bottom plate 5 and the motor mounting platform 59, and the coupling mounting hole 592 is located in the middle of the motor mounting stepped hole 591; a push rod moving track 55 is provided on the bottom surface of one side of the two sides of the motor mounting platform 59 on the bottom plate (5) along the length direction of the bottom plate 5, and a slider moving groove 56 is provided on both sides of the push rod moving track 55 along the length direction of the bottom plate 5, and the slider moving groove 56 is provided on both sides of the push rod moving track 55. A rack mounting platform 57 is provided on the outer side of the groove 56 along the length direction of the base plate 5; a guide rod mounting key slot 58 is also provided near the middle position on the base plate 5, and the guide rod mounting key slot 58 and the top rod moving track 55 are provided in a straight line in the length direction of the base plate 5; a slide rail mounting frame 54 is provided at the bottom of the base plate 5, and the slide rail mounting frame 54 is installed at a position close to the two end points of the slider moving groove 56 in the length direction; a slide rail mounting through hole 541 is provided on the slide rail mounting frame 54; a slide rail 17 is installed in the slide rail mounting through hole 541.

[0037] During installation and debugging, first install the short axis measuring mechanism 1. First, place the moving slider 11 on the bottom plate 5, and make the slider columns 113 at both ends of the moving slider 11 in the slider moving groove 56; after the slide rail 17 passes through the slide rail installation through hole 541 of a slide rail mounting frame 54 at the bottom of the bottom plate 5, the slide rail installation hole 114 on the slider column 113, and the slide rail installation through hole 543 of another slide rail mounting frame 54 that is in line with the slide rail installation through hole 541 that has been passed through in the length direction of the bottom plate 5, the two ends are fixed with nuts. Then, the two racks 16 are pre-installed on the rack installation platform 57 on the bottom plate 5, and after the two gears 15 are connected to the two second motors 18 respectively, the two second motors 18 are respectively installed at the two ends of the upper plane of the rectangular slider body 116 of the moving slider 11, and then the positions of the gears 15 and the racks 16 are adjusted so that the two are meshed and connected, and then the position of the racks 16 is fixed. Then install the push rod 12 in the push rod installation through hole 111 of the moving slider 11, and install the infrared probe 13 in the infrared probe installation hole 121 of the push rod 12. Install the direction rod 14 in the direction rod installation keyway 58 of the bottom plate 5, so that the key 146 of the second cylinder 142 on the direction rod 14 corresponds to the direction rod installation keyway 58 on the bottom plate 5, and the plane 144 of the direction rod 14 extends out from the bottom plate 5. Then adjust the height of the push rod 12 and the direction rod 14, so that the infrared probe 13 is aligned with the plane 144 of the direction rod 14 as the infrared probe distance measurement target surface, and finally screw the nut into the thread 145 on the second cylinder 142 of the direction rod 14 to fix it, and install the locking screw into the locking screw installation hole 112 of the moving slider 11 and the positioning locking hole 122 of the push rod 12 for positioning.

[0038] Then, install the long axis measuring mechanism 2. First, connect the third motor 26, the coupling 25 and the screw 23 in sequence, then install the third motor 26 on the motor mounting platform 59 of the bottom plate 5, and screw it into the motor mounting stepped hole 591 to fix it. Then install the second infrared probe 22 on the height measuring plate 21, install the internal thread bearing 24 into the internal thread bearing mounting hole 211, install the screw 23 and the marking rod 14 on the height measuring plate 21, and make the top rod 12 located in the moving slide groove 213 of the short axis measuring mechanism 1 of the height measuring plate 21.

[0039] During measurement, the curved pipe 4 is first passed through the position between the height measuring plate 21 and the bottom plate 5 and then placed horizontally on the bottom plate 5, so that the inner side of the curved pipe 4 faces the positioning machine 3, and the outer side of the curved pipe faces the short axis measuring mechanism 1. First, the second motor 18 rotates, driving the gear 15 to rotate. The gear 15 transmits on the rack 16, driving the moving slider 11 to move on the slide rail 17, thereby driving the infrared probe 13 on the top rod 12 to move. When the moving slider 11 moves to touch the curved pipe 4, the second motor 18 stops rotating. Then, the third motor 26 rotates, driving the screw 23 to rotate through the coupling 25. Under the constraint of the marking rod 14, the height measuring plate 21 only retains the upward and downward freedom of movement, thereby driving the second infrared probe 22 on the height measuring plate 21 to move up and down. When the height measuring plate 21 moves to contact the elbow 4, the third motor 26 stops rotating, and the second infrared probe 22 measures the distance to the bottom plate 28, the length of the major axis of the cross section of the metal elbow can be measured; the first infrared probe 13 can measure the distance between the infrared probe 13 and the plane 141 on the marking rod 14, which is used as the infrared probe distance measurement target surface, and then subtract the radius of the first cylinder 141 and the distance from the infrared probe 13 to the front end surface of the boss 117 of the moving slider 11, and the length of the minor axis of the cross section of the metal elbow 4 can be measured. Finally, according to the measured lengths of the major axis and minor axis of the cross section of the elbow 4, and the known original outer diameter of the pipe fitting, the cross section ellipticity of the elbow 4 can be obtained.

[0040] In a metal bend section distortion measurement mechanism of the present embodiment, (1) the movement of the moving slider drives the infrared probe at the bottom of the push rod to focus on the reference rod, and the short axis length of the bend section is measured, with a stable structure and simple operation. (2) The moving slider is driven by a dual motor and then driven by a gear rack, with a stable and reliable structure. The height of the push rod and the reference rod can be changed and adjusted according to the outer diameter of the metal bend to be measured, with simple operation and strong versatility. (3) The motor drives the screw to rotate, and the screw is connected to the height measuring plate through an internal threaded bearing, thereby driving the change in the height of the infrared probe on the height measuring plate, realizing the height adjustment of the infrared probe and the measurement of the long axis of the section, with a stable structure and simple operation. (4) The reference rod constrains the rotational freedom of the height measuring plate, and only retains its sliding freedom, thereby realizing the height adjustment of the height measuring plate, with a stable and reliable structure. The length of the height measuring plate can be changed and adjusted according to the outer diameter of the metal bend to be measured, with simple operation and strong versatility.

Claims

1. A metal bent pipe cross-sectional distortion measuring mechanism, characterized in that: It comprises a bottom plate (5), on which a measuring mechanism consisting of a metal bend pipe cross-section short axis measuring mechanism (1) and a metal bend pipe surface long axis measuring mechanism (2) is installed; The metal bent pipe cross-section short axis measuring mechanism (1) comprises a moving slider (11) mounted on the base plate (5), a second motor (18) mounted on the moving slider (11), and an output shaft of the second motor (18) is connected to a gear (15); a rack (16) is mounted on the base plate (5), and the rack (16) is meshedly connected to the gear (15); a push rod (12) is mounted at the middle position of the front end of the moving slider (11), a first infrared probe (13) is mounted on the push rod (12), and a guide rod (14) is mounted on the base plate (5) at a position opposite to the first infrared probe (13); The metal bend pipe surface long axis measuring mechanism (2) comprises a third motor (26) installed at the bottom of the base plate (5), the third motor (26) being connected to the screw rod (23) via a coupling (25); the screw rod (23) being screwed and connected via an internal threaded bearing (24) installed on the height measuring plate (21); a second infrared probe (22) being installed at the bottom of the height measuring plate (21); the direction bar (14) on the base plate (5) passing through the height measuring plate (21) and being located on the upper surface of the height measuring plate (21); The movable slider (11) of the metal bent pipe cross-section minor axis measuring mechanism (1) comprises a rectangular slider body (116), a boss (117) is integrally formed and installed in the middle position of the rectangular slider body (116), slider columns (113) are integrally formed and installed at both ends of the bottom of the rectangular slider body (116), a push rod installation through hole (111) and a locking screw installation hole (112) are provided on the boss (117); a slide rail installation hole (114) is provided on the slider column (113); a motor installation hole (115) is provided on the upper surface of the rectangular slider body (116); a second motor (18) is installed on the rectangular slider body (116) through the motor installation hole (115) and screws; The bottom of the push rod (12) is provided with an infrared probe mounting hole (121) and a positioning locking hole (122); a first infrared probe (13) is mounted in the infrared probe mounting hole (121); The marking rod (14) is made of a first cylinder (141) at the upper end, a second cylinder (142) in the middle and a semi-cylinder (143) at the lower end. A plane (144) serving as a distance measuring target surface of an infrared probe is provided at the lower end of the semi-cylinder (143). A thread (145) is provided on the second semi-cylinder (142) above the plane (144). A key (146) is installed on the top of the second semi-cylinder (142). The height measuring plate (21) on the metal pipe bending surface long axis measuring mechanism (2) is provided with an internal thread bearing mounting hole (211), a guide rod mounting through hole (212), and a push rod moving slide groove (213) of the short axis measuring mechanism (1).

2. A metal bent pipe cross-sectional distortion measuring mechanism as claimed in claim 1, characterized in that: A motor mounting platform (59) is installed on the lower bottom surface at the middle position of the base plate (5), and a motor mounting stepped hole (591) and a coupling mounting hole (592) are provided through the base plate (5) and the motor mounting platform (59), and the coupling mounting hole (592) is located in the middle of the motor mounting stepped hole (591); a push rod moving track (55) is provided on the bottom surface of one of the two sides of the motor mounting platform (59) on the base plate (5) along the length direction of the base plate (5), and slider moving grooves (56) are respectively provided on both sides of the push rod moving track (55) along the length direction of the base plate (5), and the slider moving grooves (56) are provided. A rack mounting platform (57) is provided on the outer side of the bottom plate (56) along the length direction of the bottom plate (5); a guide rod mounting key slot (58) is also provided on the bottom plate (5) near the middle position, and the guide rod mounting key slot (58) and the top rod moving track (55) are provided in a straight line in the length direction of the bottom plate (5); a slide rail mounting frame (54) is provided at the bottom of the bottom plate (5), and the slide rail mounting frame (54) is installed at a position close to the two end points of the slider moving groove (56) in the length direction; a slide rail mounting through hole (541) is provided on the slide rail mounting frame (54); and a slide rail (17) is installed in the slide rail mounting through hole (541).

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