A device for measuring cross-sectional distortion of metal bent pipe

Abstract

The invention discloses a device for measuring the cross-section distortion of a metal bend pipe, comprising a bottom plate, on which a positioning mechanism, a metal bend pipe cross-section short axis measuring mechanism and a metal bend pipe surface long axis measuring mechanism are installed; and a mounting plane is provided on the bottom plate. The invention has the characteristics of simple operation, high modularization degree and high operation efficiency.

Description

Technical Field

[0001] The invention relates to a device for measuring cross-section distortion of a metal bent pipe. 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 device for measuring the cross-section distortion of a metal bent pipe, which has the advantages of 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 device for measuring cross-section distortion of a metal bend pipe comprises a bottom plate, on which a positioning mechanism, a metal bend pipe cross-section short axis measuring mechanism and a metal bend pipe surface long axis measuring mechanism are installed; and a mounting plane is provided on the bottom plate.

[0007] The positioning mechanism includes an adjusting slider installed on the mounting plane of the base plate; a lower cover plate is installed on the adjusting slider; a pair of positioning support rods are installed between the adjusting slider and the lower cover plate; an upper cover plate is installed on the lower cover plate; a pair of positioning support rods are also installed between the lower cover plate and the upper cover plate; a positioning push rod is installed between one positioning support rod between the adjusting slider and the lower cover plate and one positioning support rod between the lower cover plate and the upper cover plate, and a positioning push rod is also installed between another positioning support rod between the adjusting slider and the lower cover plate and another positioning support rod between the lower cover plate and the upper cover plate; a first motor is installed on the base plate, and the first motor is connected to a screw rod; the screw is threadedly connected to the internal threaded hole on the connecting rod; the connecting rod is connected to two pairs of positioning support rods.

[0008] The metal bent pipe section short axis measuring mechanism includes a moving slider installed on the base 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 base plate, and the rack is meshed with the gear; a push rod is installed in the middle position of the front end of the moving slider, a first infrared probe is installed on the push rod, and a guide rod is installed on the base plate at a position relative to the infrared probe.

[0009] 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.

[0010] Two guide rings are installed between the adjusting slider and the lower cover in the positioning mechanism; two guide rings are also installed between the lower cover and the upper cover; a positioning support rod slide groove is provided in the middle of the guide ring, and mounting columns are installed at both ends of the guide ring, and the mounting columns on the guide ring are respectively connected to the guide ring mounting blind holes on the adjusting slider, the upper cover, and the lower cover through screws;

[0011] A pair of positioning support rods located between the adjusting slider and the lower cover plate respectively pass through the positioning support rod sliding groove on a guide ring between the adjusting slider and the lower cover plate, and then are stacked and installed on the connecting rod; a pair of positioning support rods located between the lower cover plate and the upper cover plate also respectively pass through the positioning support rod sliding groove on a guide ring between the lower cover plate and the upper cover plate, and then are stacked and installed on the connecting rod;

[0012] One end of the positioning support rod is a third cylinder, and the other end is an L-shaped mounting platform, and the third cylinder is connected to the L-shaped mounting platform through a mounting platform, and the third cylinder is installed at the center of the mounting platform; an eccentrically installed connecting rod mounting through hole is opened on the L-shaped mounting platform, and the positioning support rod is mounted on the connecting rod through the connecting rod mounting through hole.

[0013] A rectangular hole and a first connecting rod movable groove are provided in the middle of the adjusting slider, and the rectangular hole is connected to the first connecting rod movable groove; a lower cover plate mounting blind hole and a guide ring mounting blind hole are provided around the first connecting rod movable groove; sliding blocks are integrally installed at both ends of the bottom of the adjusting slider close to the first connecting rod movable groove, and a slide rail mounting through hole is provided on the sliding block; a motor mounting platform is installed on the other side of the adjusting slider, and a first motor mounting hole is provided on the motor mounting platform; a first motor is fixedly installed on the motor mounting platform through the first motor mounting hole and screws.

[0014] The bottom of the lower cover plate is integrally formed with a lower cover plate mounting foot, and a lower cover plate stepped through hole corresponding to the position of the lower cover plate mounting blind hole on the adjusting slider is provided in the lower cover plate mounting foot; a second connecting rod movable groove having the same position and cross-sectional shape as the first connecting rod movable groove on the adjusting slider is provided on the middle side of the lower cover plate; a guide ring mounting blind hole is provided on the upper surface of the lower cover plate, and a guide ring mounting blind hole corresponding to the position of the guide ring mounting blind hole on the adjusting slider is also provided on the lower surface of the lower cover plate.

[0015] The bottom of the upper cover plate is integrally formed with an upper cover plate mounting foot, and an upper cover plate stepped through hole corresponding to the position of the lower cover plate stepped through hole on the lower cover plate is provided in the upper cover plate mounting foot; a third connecting rod movable groove having the same position and cross-sectional shape as the first connecting rod movable groove on the adjusting slider is also provided at the middle bottom of one side of the lower cover plate; a guide ring mounting blind hole corresponding to the position of the guide ring mounting blind hole provided on the upper surface of the lower cover plate is also provided on the lower surface of the lower cover plate.

[0016] The connecting rod is a cylindrical connecting rod, and an internal threaded hole for installing a screw rod is provided in the middle of the connecting rod. The internal threaded hole on the connecting rod is threadedly connected with the screw rod.

[0017] The upper 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 second motor installation hole is provided on the upper surface of the rectangular slider body; and a second motor is installed on the rectangular slider body through the second motor installation hole and screws;

[0018] An infrared probe installation hole and a positioning locking hole are provided at the bottom of the top rod; a first infrared probe is installed in the infrared probe installation hole.

[0019] 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.

[0020] 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 push rod moving sliding groove on the short axis measuring mechanism.

[0021] A motor mounting platform is installed on the lower bottom surface in the middle position of the base plate, and a motor mounting step hole and a coupling mounting hole are provided through the base plate and the motor mounting platform, and the coupling mounting hole is located in the middle of the motor mounting step hole; two mounting planes for adjusting sliders are provided on the upper bottom surface of one of the two sides of the motor mounting platform on the base plate along the length direction of the base plate; a connecting rod sliding groove is provided in the middle of the two mounting planes, and sliding block sliding grooves are provided on both sides of the connecting rod sliding groove; a top rod moving track is provided on the upper bottom surface of one of the other sides of the motor mounting platform on the base plate along the length direction of the base plate, Slider moving grooves are respectively provided on both sides of the push 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 guide rod mounting key groove is also provided on the base plate near the middle position, and the guide rod mounting key groove and the push 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 respectively installed at the positions of the two end points in the length direction of the sliding block slide groove and the two end points in the length direction of the slider moving groove; a slide rail mounting through hole is provided on the slide rail mounting frame; and a slide rail is installed in the slide rail mounting through hole.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The design of the connecting rod mounting through hole for the eccentrically mounted positioning support rod of the L-shaped mounting platform of the present invention allows a pair of positioning support rods to be relatively stacked and installed, thereby effectively avoiding mutual interference between the two positioning support rods at the same horizontal position when they are stretched and positioned, thereby achieving positioning support for curved pipes with any bending angle.

[0024] (2) Secondly, the cylinder is fixed to the center of the mounting platform of the L-shaped mounting platform; thus, the horizontality of the cylinder of a pair of positioning support rods is ensured, and the positioning accuracy is improved. The guide ring is used to constrain the movement path of the positioning support rod, and cooperates with the connecting rod to ensure that the positioning rods at both ends are always located on both sides of the symmetrical bending center angle, further ensuring the positioning accuracy and measurement accuracy.

[0025] (3) 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 bent pipe section is measured. The structure is stable and the operation is simple. The moving slider is driven by a dual motor and then driven by a gear rack. The structure is stable and reliable. The height of the push rod and the reference rod can be changed and adjusted according to the outer diameter of the metal bent pipe to be measured. The operation is simple and the versatility is strong.

[0026] (4) 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 cross section. The structure is stable and the operation is simple. The guide 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. 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. The operation is simple and the versatility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the positioning mechanism;

[0029] Figure 3 yes Figure 1 The enlarged structural diagram after removing the elbow and the upper cover plate;

[0030] Figure 4 yes Figure 1 The enlarged structural diagram of the short axis measuring mechanism after the elbow is removed;

[0031] Figure 5 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;

[0032] Figure 6 yes Figure 1The enlarged structural diagram of the long axis measuring mechanism after the elbow is removed;

[0033] Figure 7 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;

[0034] Figure 8 yes Figure 2 An enlarged schematic diagram of the positioning support rod in FIG.

[0035] Fig. 9 yes Figure 2 An enlarged schematic diagram of the adjustment slider in FIG.

[0036] Fig.10 yes Figure 2 An enlarged schematic diagram of the middle and lower cover plate in FIG.

[0037] Fig.11 yes Figure 2 An enlarged bottom view of the lower cover plate in FIG.

[0038] Fig.12 yes Figure 2 An enlarged schematic diagram of the upper cover plate in FIG.

[0039] Fig.13 yes Figure 2 An enlarged schematic diagram of the guide ring in FIG.

[0040] Fig.14 yes Figure 2 An enlarged schematic diagram of the connecting rod in FIG.

[0041] Fig.15 yes Figure 4 An enlarged schematic diagram of the moving slider in FIG.

[0042] Fig.16 yes Figure 4 An enlarged schematic diagram of the middle push rod;

[0043] Fig.17 yes Figure 4 An enlarged schematic diagram of the center mark direction rod;

[0044] Fig.18 yes Figure 6 Schematic diagram of the structure of the middle height plate;

[0045] Fig.19 yes Figure 1 Schematic diagram of the base plate structure. DETAILED DESCRIPTION

[0046] A device for measuring cross-sectional distortion of a metal bent pipe according to this embodiment is as follows: Figure 1-19As shown, it includes a base plate 5, on which a positioning mechanism 3, a metal bend pipe cross-section short axis measuring mechanism 1 and a metal bend pipe surface long axis measuring mechanism 2 are installed; and a mounting plane 51 is opened on the base plate 5.

[0047] The positioning mechanism 3 includes an adjusting slider 36 mounted on the mounting plane 51 of the bottom plate 5; a lower cover plate 35 is mounted on the adjusting slider 36; a pair of positioning support rods 31 are mounted between the adjusting slider 36 and the lower cover plate 35; an upper cover plate 34 is mounted on the lower cover plate 35; a pair of positioning support rods 31 are also mounted between the lower cover plate 35 and the upper cover plate 34; wherein a positioning support rod 31 between the adjusting slider 36 and the lower cover plate 35, the lower cover plate 35 and the upper cover plate 34 A positioning push rod 32 is installed between one of the positioning support rods 31, and a positioning push rod 32 is also installed between another positioning support rod 31 between the adjusting slider 36 and the lower cover plate 35, and another positioning support rod 31 between the lower cover plate 35 and the upper cover plate 34; a first motor 39 is installed on the base plate 5, and the first motor 39 is connected to the screw rod 38; the screw rod 38 is threadedly connected to the internal threaded hole 371 on the connecting rod 37; the connecting rod 37 is connected to the two pairs of positioning support rods 31.

[0048] The metal bent pipe section short axis measuring mechanism 1 includes a moving slider 11 installed on the base plate 5, a second motor 18 is installed on the moving slider 11, and the output shaft of the second motor 18 is connected to the gear 15; a rack 16 is installed on the base plate 5, and the rack 16 is meshed and connected with the gear 15; a push rod 12 is installed at the middle position of the front end of the moving slider 11, a first infrared probe 13 is installed on the push rod 12, and a marking rod 14 is installed on the base plate 5 at a position relative to the first infrared probe 13.

[0049] 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.

[0050] Two guide rings 33 are installed between the adjusting slider 36 and the lower cover plate 35 in the positioning mechanism 3; two guide rings 33 are also installed between the lower cover plate 35 and the upper cover plate 34; a positioning support rod slide groove 331 is opened in the middle of the guide ring 33, and mounting columns 332 are respectively installed at both ends of the guide ring 33. The mounting columns 332 on the guide ring 33 are respectively connected to the guide ring mounting blind holes 364 on the adjusting slider 36, the upper cover plate 34, and the lower cover plate 35 through screws;

[0051] A pair of positioning support rods 31 located between the adjusting slider 36 and the lower cover plate 35 respectively pass through a positioning support rod slide groove 331 on a guide ring 33 between the adjusting slider 36 and the lower cover plate 35 and are then stacked and installed on the connecting rod 37; a pair of positioning support rods 31 located between the lower cover plate 35 and the upper cover plate 34 also respectively pass through a positioning support rod slide groove 331 on a guide ring 33 between the lower cover plate 35 and the upper cover plate 34 and are then stacked and installed on the connecting rod 37;

[0052] One end of the positioning support rod 31 is a third cylinder 311, and the other end is an L-shaped mounting platform 313, and the third cylinder 311 and the L-shaped mounting platform 313 are connected through a mounting platform 312, and the third cylinder 311 is installed at the center position of the mounting platform 312; an eccentrically installed connecting rod mounting through hole 314 is opened on the L-shaped mounting platform 313, and the positioning support rod 31 is mounted on the connecting rod 37 through the connecting rod mounting through hole 314.

[0053] A rectangular hole 361 and a first connecting rod movable groove 362 are provided in the middle of the adjusting slider 36, and the rectangular hole 361 is connected to the first connecting rod movable groove 362; a lower cover plate mounting blind hole 363 and a guide ring mounting blind hole 364 are provided around the first connecting rod movable groove 362; sliding blocks 365 are integrally formed and installed at both ends of the bottom of the adjusting slider 36 close to the first connecting rod movable groove 362, and a slide rail mounting through hole 366 is provided on the sliding block 365; a motor mounting platform 367 is installed on the other side of the adjusting slider 36, and a first motor mounting hole 368 is provided on the motor mounting platform 367; a first motor 39 is fixedly installed on the motor mounting platform 367 through the first motor mounting hole 368 and screws.

[0054] The bottom of the lower cover plate 35 is integrally formed with a lower cover plate mounting foot 351, and a lower cover plate stepped through hole 352 corresponding to the position of the lower cover plate mounting blind hole 363 on the adjusting slider 36 is provided in the lower cover plate mounting foot 351; a second connecting rod movable groove 354 having the same position and cross-sectional shape as the first connecting rod movable groove 362 on the adjusting slider 36 is provided on the middle side of the lower cover plate 35; a guide ring mounting blind hole 364 is provided on the upper surface of the lower cover plate 35, and a guide ring mounting blind hole 364 corresponding to the position of the guide ring mounting blind hole 364 on the adjusting slider 36 is also provided on the lower surface of the lower cover plate 35.

[0055] The bottom of the upper cover plate 34 is integrally formed with an upper cover plate mounting foot 341, and an upper cover plate stepped through hole 342 corresponding to the position of the lower cover plate stepped through hole 352 on the lower cover plate 35 is opened in the upper cover plate mounting foot 341; a third connecting rod movable groove 343 having the same position and cross-sectional shape as the first connecting rod movable groove 362 on the adjusting slider 36 is also opened at the middle bottom of one side of the lower cover plate 34; a guide ring mounting blind hole 364 corresponding to the position of the guide ring mounting blind hole 364 opened on the upper surface of the lower cover plate 35 is also opened on the lower surface of the lower cover plate 34.

[0056] The connecting rod 37 is a cylindrical connecting rod, and an internal threaded hole 371 for installing the screw rod 38 is opened in the middle position of the connecting rod 37. The internal threaded hole 371 on the connecting rod 37 is threadedly connected with the screw rod 38.

[0057] The upper 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 second motor mounting hole 115 is provided on the upper surface of the rectangular slider body 116; and a second motor 18 is installed on the rectangular slider body 116 through the second motor mounting hole 115 and screws;

[0058] 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;

[0059] 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.

[0060] 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 on the short axis measuring mechanism.

[0061] A motor mounting platform 59 is installed on the lower bottom surface of the middle position of the bottom plate 5. 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. The coupling mounting hole 592 is located in the middle of the motor mounting stepped hole 591. On one side of the motor mounting platform 59 on the bottom surface, two mounting planes 51 for adjusting sliders 36 are provided along the length direction of the bottom plate 5; a connecting rod sliding groove 52 is provided in the middle of the two mounting planes 51, and sliding block sliding grooves 53 are provided on both sides of the connecting rod sliding groove 52; on the other side of the motor mounting platform 59 on the bottom surface, a push rod moving track 55 is provided along the length direction of the bottom plate 5, and slider moving grooves 56 are provided on both sides of the push rod moving track 55 along the length direction of the bottom plate 5, and a rack mounting platform 57 is provided on the outer side of the slider moving groove 56 along the length direction of the bottom plate 5; a marking rod mounting key groove 58 is also provided near the middle position on the bottom plate 5, and the marking rod mounting key groove 58 and the push rod moving track 55 are provided in a straight line in the length direction of the bottom plate 5; the bottom plate 5 A slide rail mounting frame 54 is provided at the bottom, and the slide rail mounting frame 54 is respectively installed at the two end points in the length direction of the sliding block slide groove 53 and the two end points in the length direction of the slider moving groove 56; 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.

[0062] 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 installation 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 541 of another slide rail installation 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.

[0063] 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.

[0064] Then install the positioning mechanism 3. First, install the adjusting slider 36 on the installation plane 51 of the bottom plate 5, so that the sliding block 365 on the adjusting slider 36 is installed in the sliding block slot 53 of the bottom plate 5, and then pass a pair of positioning support rods 31 through the positioning support rod slots 331 on the guide ring 33, and relatively stack and install them on the bottom plate 5, and then install the lower cover plate 35, so that the mounting columns 332 at both ends of the guide ring 33 are respectively installed in the guide ring mounting blind holes 364 of the adjusting slider 36 and the lower cover plate, and then screw in the lower cover plate stepped through holes 352 in the lower cover plate mounting feet 351 of the lower cover plate 35 and fix them with the lower cover plate mounting blind holes 363 on the adjusting slider 36. After that, the connecting rod 37 is installed into the connecting rod installation through hole 314 at the tail end of the L-shaped installation platform 313 of the pair of positioning support rods 31 between the adjusting slider 36 and the lower cover plate 35; the first motor 39 is installed on the motor installation platform 367 of the adjusting slider 36, and a screw is screwed into the first motor installation hole 368 to fasten it to the first motor 39. One end of the screw rod 38 is connected to the first motor 39, and the other end is threadedly connected to the internal threaded hole 371 of the connecting rod 37. Next, another pair of positioning support rods 31 are passed through the positioning support rod slide slots 331 of the guide ring 33, and are relatively stacked and installed on the lower cover plate 35, and the other end of the connecting rod 37 is installed in the connecting rod installation through hole 314 at the tail end of the L-shaped installation platform 313 of the positioning support rod 31; then the upper cover plate 34 is installed, and the installation columns 332 at both ends of the guide ring 33 are installed in the guide ring installation blind holes 36 of the upper cover plate 34 and the guide ring installation blind holes 364 of the lower cover plate 35 respectively, and then screws are screwed into the upper cover plate stepped through holes 342 in the installation feet 341 of the upper cover plate 34 and fixed in the lower cover plate stepped through holes 352 opened on the upper surface of the lower cover plate 35. Then the positioning push rod 32 is installed on the front end of the positioning support rod 31.

[0065] 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, and the gear 15 is driven on the rack 16 to drive the moving slider 11 to move on the slide rail 17, thereby driving the first infrared probe 13 on the push rod 12 to move. When the moving slider 11 moves to touch the curved pipe 4, the second motor 18 stops rotating. Then, the first motor 39 rotates, driving the screw rod 38 to rotate; the screw rod 38 and the connecting rod 37 are driven by thread transmission, driving the connecting rod 37 to move toward the inner side of the curved pipe 4, thereby pushing the positioning support rod 31 to move toward the inner side of the curved pipe 4. Until the positioning push rod 32 supports the inner side of the curved pipe 4, and the outer side of the curved pipe 4 has been supported and immovable by the short axis measuring mechanism 1, the first motor 39 stops rotating, and the positioning of the curved pipe 4 is completed. After that, the third motor 26 rotates, driving the screw 23 to rotate through the coupling 25. The height measuring plate 21, under the constraint of the reference rod 14, only retains the freedom of movement up and down, 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 5, and 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 first infrared probe 13 and the plane 141 on the reference rod 14 as the infrared probe distance measurement target surface, and then subtract the radius of the first cylinder 141 and the distance from the first 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.

[0066] If the positioning mechanism is far from the bend pipe 4, the position of the adjusting slider 36 is first moved as a whole, and after being adjusted to a suitable position, the positioning operation is performed.

[0067] In a metal bend springback measuring device of this embodiment, (1) the positioning support rod of the present invention is designed with an eccentrically mounted connecting rod mounting through hole on the L-shaped mounting platform, and a pair of positioning support rods are relatively stacked and installed, which effectively avoids the mutual interference of the two positioning support rods at the same horizontal position when they are stretched and positioned, thereby realizing the positioning support of the bend with any bending angle. (2) Secondly, the cylinder is fixedly connected to the center position of the mounting platform of the L-shaped mounting platform; thereby ensuring the horizontality of the cylinder of the pair of positioning support rods and improving the positioning accuracy. The guide ring is used to constrain the movement path of the positioning support rod, and cooperates with the connecting rod to make the positioning push rods at both ends always located on both sides of the symmetrical bending center angle, further ensuring the positioning accuracy and measurement accuracy. (3) 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. The moving slider is driven by a dual motor and then driven by a gear rack, and the structure is stable and reliable. 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. (4) 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 cross section. The structure is stable and the operation is simple. The guide 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. 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. The operation is simple and the versatility is strong.

Claims

1. A device for measuring cross-sectional distortion of a metal bent pipe, characterized in that: The invention comprises a bottom plate (5), on which a positioning mechanism (3), a metal bend pipe cross-section minor axis measuring mechanism (1) and a metal bend pipe surface major axis measuring mechanism (2) are installed; the bottom plate (5) is provided with a mounting plane (51); the positioning mechanism (3) comprises an adjusting slider (36) installed on the mounting plane (51) of the bottom plate (5); a lower cover plate (35) is installed on the adjusting slider (36); a pair of positioning support rods (31) are installed between the adjusting slider (36) and the lower cover plate (35); an upper cover plate (34) is installed on the lower cover plate (35); the lower cover plate (35) and the upper cover plate (34) are connected to each other. A pair of positioning support rods (31) are also installed between the adjusting slider (36) and the lower cover plate (35); a positioning push rod (32) is installed between a positioning support rod (31) between the lower cover plate (35) and the upper cover plate (34); another positioning support rod (31) between the adjusting slider (36) and the lower cover plate (35) and another positioning support rod (31) between the lower cover plate (35) and the upper cover plate (34) are also installed between the positioning push rod (32); a first motor (39) is installed on the bottom plate (5), and the first motor (39) is connected to the first screw rod (38); The first screw rod (38) is threadedly connected to the internal threaded hole (371) on the connecting rod (37); the connecting rod (37) is connected to two pairs of positioning support rods (31); the metal bent pipe cross-section short axis measuring mechanism (1) comprises a moving slider (11) installed on the base plate (5), a second motor (18) is installed on the moving slider (11), and the output shaft of the second motor (18) is connected to the gear (15); a rack (16) is installed on the base plate (5), and the rack (16) is meshed and connected to the gear (15); a push rod (12) is installed at the middle position of the front end of the moving slider (11), and a a first infrared probe (13), a reference rod (14) being installed on the bottom plate (5) at a position opposite to the first infrared probe (13); the metal bend pipe surface long axis measuring mechanism (2) comprising a third motor (26) installed at the bottom of the bottom plate (5), the third motor (26) being connected to the second screw rod (23) via a coupling (25); the second 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 reference rod (14) on the bottom plate (5) passing through the height measuring plate (21) and being located on the upper surface of the height measuring plate (21); Two guide rings (33) are installed between the adjusting slider (36) and the lower cover (35) in the positioning mechanism (3); two guide rings (33) are also installed between the lower cover (35) and the upper cover (34); a positioning support rod sliding groove (331) is provided in the middle of the guide ring (33), and mounting columns (332) are respectively installed at both ends of the guide ring (33); the mounting columns (332) on the guide ring (33) are respectively connected to the adjusting slider (36), the upper cover (34), and the guide ring mounting blind holes (364) on the lower cover (35) by screws; a pair of positioning support rods (31) located between the adjusting slider (36) and the lower cover (35) are respectively inserted through the adjusting slider (36) and the upper cover (34) and the lower cover (35). The positioning support rod slide groove (331) on a guide ring (33) between the lower cover plate (36) and the lower cover plate (35) is then stacked and installed on the connecting rod (37); a pair of positioning support rods (31) located between the lower cover plate (35) and the upper cover plate (34) also pass through the positioning support rod slide groove (331) on a guide ring (33) between the lower cover plate (35) and the upper cover plate (34) respectively, and then stacked and installed on the connecting rod (37); one end of the positioning support rod (31) is a third cylinder (311), and the other end is an L-shaped mounting platform (313), and the third cylinder (311) and the L-shaped mounting platform (313) are connected through a mounting platform (312), and the third cylinder (3 11) is installed at the center position of the mounting platform (312); an eccentrically installed connecting rod mounting through hole (314) is opened on the L-shaped mounting platform (313), and the positioning support rod (31) is sleeved on the connecting rod (37) through the connecting rod mounting through hole (314); a rectangular hole (361) and a first connecting rod movable groove (362) are opened in the middle of the adjusting slider (36), and the rectangular hole (361) and the first connecting rod movable groove (362) are connected; a lower cover plate mounting blind hole (363) and a guide ring mounting blind hole (364) are opened around the first connecting rod movable groove (362); the bottom of the adjusting slider (36) close to the first connecting rod movable groove (362) A sliding block (365) is integrally formed and installed at both ends, and a first slide rail installation through hole (366) is provided on the sliding block (365); a motor mounting platform (367) is installed on the other side of the adjusting slider (36), and a first motor mounting hole (368) is provided on the motor mounting platform (367); a first motor (39) is fixedly installed on the motor mounting platform (367) through the first motor mounting hole (368) and screws; a lower cover mounting foot (351) is integrally formed and installed at the bottom of the lower cover (35), and a lower cover stepped through hole (352) corresponding to the position of the lower cover mounting blind hole (363) on the adjusting slider (36) is provided in the lower cover mounting foot (351);A second connecting rod movable groove (354) having the same position and cross-sectional shape as the first connecting rod movable groove (362) on the adjusting slider (36) is provided on one middle side of the lower cover plate (35); a guide ring mounting blind hole (364) is provided on the upper surface of the lower cover plate (35); and a guide ring mounting blind hole (364) corresponding to the position of the guide ring mounting blind hole (364) on the adjusting slider (36) is also provided on the lower surface of the lower cover plate (35); The bottom of the upper cover plate (34) is integrally formed with an upper cover plate mounting foot (341), and an upper cover plate stepped through hole (342) corresponding to the position of the lower cover plate stepped through hole (352) on the lower cover plate (35) is provided in the upper cover plate mounting foot (341); a third connecting rod movable groove (343) having the same position and cross-sectional shape as the first connecting rod movable groove (362) on the adjusting slider (36) is also provided at the middle bottom of one side of the lower cover plate (35). The lower surface of the lower cover plate (35) is also provided with a guide ring mounting blind hole (364) corresponding to the guide ring mounting blind hole (364) provided on the upper surface of the lower cover plate (35); the connecting rod (37) is a cylindrical connecting rod, and an internal threaded hole (371) for mounting a first screw rod (38) is provided in the middle of the connecting rod (37); the internal threaded hole (371) on the connecting rod (37) is threadedly connected to the first screw rod (38); 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 second motor installation hole (115) is provided on the upper surface of the rectangular slider body (116), and the rectangular slider body (116) is connected to the second motor installation hole (115). The second motor (18) is installed with a screw; the bottom of the push rod (12) is provided with an infrared probe installation hole (121) and a positioning locking hole (122); the first infrared probe (13) is installed in the infrared probe installation hole (121); the marking rod (14) is integrally manufactured by 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 the infrared probe is provided at the lower end of the semi-cylinder (143), a thread (145) is provided on the second cylinder (142) above the plane (144), and a key (146) is installed on the top of the second cylinder (142).

2. A device for measuring cross-sectional distortion of a metal bent pipe according to claim 1, characterized in that: 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).

3. A device for measuring cross-sectional distortion of a metal bent pipe according to 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 mounting plane (51) for two adjusting sliders (36) is provided on the upper 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); a connecting rod sliding groove (52) is provided in the middle of the two mounting planes (51), and sliding block sliding grooves (53) are provided on both sides of the connecting rod sliding groove (52); a top rod moving track (55) is provided on the upper bottom surface of the other side 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 the Slider moving grooves (56) are respectively provided on both sides of the top rod moving track (55) along the length direction of the bottom plate (5), and a rack mounting platform (57) is provided on the outer side of the slider moving groove (56) along the length direction of the bottom plate (5); a guide rod mounting key groove (58) is also provided on the bottom plate (5) near the middle position, and the guide rod mounting key groove (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 respectively installed at the two end points in the length direction of the sliding block slide groove (53) and the two end points in the length direction of the slider moving groove (56); a second slide rail mounting through hole (541) is provided on the slide rail mounting frame (54); a slide rail (17) is installed in the second slide rail mounting through hole (541).

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