A positioning mechanism for measuring cross-sectional distortion of metal bent pipes

Abstract

The present invention discloses a positioning mechanism for measuring cross-sectional distortion of a metal bent pipe, comprising a bottom plate, a mounting plane on which an adjusting slider is mounted; a lower cover plate is mounted on the adjusting slider; a pair of positioning support rods are mounted between the adjusting slider and the lower cover plate; an upper cover plate is mounted on the lower cover plate; a pair of positioning support rods are also mounted between the lower cover plate and the upper cover plate; a positioning push rod is also mounted 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 motor is mounted on the bottom plate, the motor is connected to a screw rod; the screw rod is threadedly connected to an internal threaded hole on a connecting rod; the connecting rod is connected to two pairs of positioning support rods. The present invention has the advantages of simple operation, stable structure, high positioning accuracy and strong versatility.

Description

Technical Field

[0001] The invention relates to a positioning mechanism 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 positioning mechanism for measuring cross-sectional 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 positioning mechanism for measuring cross-sectional distortion of a metal bent pipe comprises a base plate, the base plate is provided with a mounting plane, an adjusting slider is installed on the mounting plane; 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 motor is installed on the base plate, the motor is connected to a screw rod; the screw rod is threadedly connected to the internal threaded hole on the connecting rod; the connecting rod is connected to two pairs of positioning support rods.

[0007] Two guide rings are installed between the adjusting slider and the lower cover plate; two guide rings are also installed between the lower cover plate and the upper cover plate; 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 plate, and the lower cover plate through screws;

[0008] A pair of positioning support rods located between the adjusting slider and the lower cover plate respectively pass through the positioning support rod sliding grooves 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 grooves on a guide ring between the lower cover plate and the upper cover plate, and then are stacked and installed on the connecting rod;

[0009] One end of the positioning support rod is a cylinder, and the other end is an L-shaped mounting platform, and the cylinder and the L-shaped mounting platform are connected through a mounting platform, and the 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.

[0010] 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 respectively 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 motor mounting hole is provided on the motor mounting platform; a motor is fixedly installed on the motor mounting platform through the motor mounting hole and screws.

[0011] 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.

[0012] 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 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 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.

[0013] 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.

[0014] A mounting plane for adjusting the slider is arranged in the middle of the base plate; a connecting rod sliding groove is arranged in the middle of the mounting plane, and sliding grooves for the sliding block on the adjusting slider are arranged on both sides of the connecting rod sliding groove; a slide rail mounting frame is arranged at the bottom of the base plate, and a mounting through hole for the slide rail is arranged on the mounting frame.

[0015] The beneficial effects of the present invention are as follows:

[0016] In a positioning mechanism for measuring the rebound of a metal bent pipe in the present embodiment, the positioning support rod is firstly designed with an eccentrically installed connecting rod mounting hole on the L-shaped mounting platform, and a pair of positioning support rods are installed relatively stacked, which effectively avoids mutual interference between the two positioning support rods at the same horizontal position when they are stretched and positioned, thereby realizing the positioning support for bent pipes with any bending angles.

[0017] 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 a pair of positioning support rods and improving the positioning accuracy.

[0018] There is also a guide ring for constraining the movement path of the positioning support rod, and cooperating with the connecting rod, so that the positioning push rods at both ends are always located on both sides of the symmetrical bending center angle, ensuring the positioning accuracy and measurement accuracy.

[0019] The invention has the advantages of simple operation, stable structure, high positioning accuracy and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention after the elbow and the upper cover are hidden;

[0022] Figure 3 is an enlarged schematic diagram of the positioning support rod in the present invention;

[0023] Figure 4is an enlarged schematic diagram of the adjustment slider in the present invention;

[0024] Figure 5 is an enlarged schematic diagram of the lower cover plate in the present invention;

[0025] Figure 6 is an enlarged bottom view of the lower cover plate in the present invention;

[0026] Figure 7 is an enlarged schematic diagram of the upper cover plate in the present invention;

[0027] Figure 8 is an enlarged schematic diagram of the guide ring in the present invention;

[0028] Fig. 9 is an enlarged schematic diagram of the connecting rod in the present invention;

[0029] Fig.10 It is an enlarged schematic diagram of the bottom plate of the present invention. DETAILED DESCRIPTION

[0030] A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe according to this embodiment, such as Figure 1-10 As shown, it includes a bottom plate 19, the bottom plate 19 is provided with a mounting plane 191, the mounting plane 191 is provided with an adjusting slider 36; the adjusting slider 36 is provided with a lower cover plate 35; a pair of positioning support rods 31 are provided between the adjusting slider 36 and the lower cover plate 35; an upper cover plate 34 is provided on the lower cover plate 35; a pair of positioning support rods 31 are also provided 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 A positioning push rod 32 is installed between a positioning support rod 31 between the plate 35 and the upper cover plate 34, 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 motor 39 is installed on the base plate 19, and the motor 39 is connected to a 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 two pairs of positioning support rods 31.

[0031] Two guide rings 33 are installed between the adjusting slider 36 and the lower cover plate 35; 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;

[0032] 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 then are 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 then are stacked and installed on the connecting rod 37;

[0033] One end of the positioning support rod 31 is a cylinder 311, and the other end is an L-shaped mounting platform 313, and the cylinder 311 and the L-shaped mounting platform 313 are connected through a mounting platform 312, and the 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.

[0034] 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 respectively 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 motor mounting hole 368 is provided on the motor mounting platform 367; a motor 39 is fixedly installed on the motor mounting platform 367 through the motor mounting hole 368 and screws.

[0035] 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.

[0036] 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 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 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.

[0037] 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.

[0038] A mounting plane 191 for adjusting the slider 36 is provided in the middle of the base plate 19; a connecting rod sliding groove 192 is provided in the middle of the mounting plane 191, and sliding grooves 193 for the sliding block 364 on the adjusting slider 36 are provided on both sides of the connecting rod sliding groove 192; a mounting frame 194 for the slide rail 17 is provided at the bottom of the base plate 19, and a mounting through hole 195 for the slide rail 17 is provided on the mounting frame 194.

[0039] During installation and debugging, first install the adjusting slider 36 on the mounting plane 191 of the base plate 19, so that the sliding block 365 on the adjusting slider 36 is installed in the slide groove 193 of the base plate 19, and then a pair of positioning support rods 31 are passed through the positioning support rod slide groove 331 on the guide ring 33 and installed on the base plate 19 relatively stacked, and then the lower cover plate 35 is installed, 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 screws are screwed into the lower cover plate stepped through holes 352 in the lower cover plate mounting feet 351 of the lower cover plate 35 to fix it to 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 motor 39 is installed on the motor installation platform 367 of the adjusting slider 36, and a screw is screwed into the motor installation hole 368 to fasten the motor 39. One end of the screw rod 38 is connected to the 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 at the front end of the positioning support rod 31, thereby completing the installation of the positioning mechanism.

[0040] When in use, the curved pipe 4 is first placed on the bottom plate 19, and the outer side of the curved pipe 4 is limited by the short axis measuring mechanism. The motor 39 rotates, driving the screw rod 38 to rotate; the screw rod 38 and the connecting rod 37 drive the connecting rod 37 to move toward the inner side of the curved pipe 4 through threaded transmission, 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, the motor 39 stops rotating, and the positioning of the curved pipe 4 is completed. If the positioning mechanism is far from the position of the curved pipe 4, first move the position of the adjustment slider 36 as a whole, adjust it to a suitable position, and then perform the above positioning operation.

[0041] In a positioning mechanism for measuring the rebound of a metal bent pipe of the present embodiment, firstly, the design of the eccentrically installed connecting rod mounting through hole 314 of the positioning support rod 31 on the L-shaped mounting platform 313, and the relatively stacked installation of a pair of positioning support rods 31 effectively avoids the mutual interference of the two positioning support rods 31 at the same horizontal position when they are stretched and positioned, thereby realizing the positioning support of the bent pipe with any bending angle. Secondly, the cylinder 311 is fixedly connected to the center position of the mounting platform 312 of the L-shaped mounting platform 313; thereby ensuring the horizontality of the cylinder 311 of a pair of positioning support rods 31 and improving the positioning accuracy. There is also a guide ring 33 for constraining the movement path of the positioning support rod 31, and cooperating with the connecting rod 37, so that the positioning push rods 32 at both ends are always located on both sides of the symmetrical bending center angle, ensuring the positioning accuracy and measurement accuracy. The present invention is simple to operate, stable in structure, high in positioning accuracy, and strong in versatility.

Claims

1. A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe, characterized in that: The invention comprises a bottom plate (19), wherein a mounting plane (191) is provided on the bottom plate (19), and an adjusting slider (36) is installed on the mounting plane (191); 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); a pair of positioning support rods (31) are also installed between the lower cover plate (35) and the upper cover plate (34); wherein the adjusting slider (36) 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), and a positioning push rod (32) is 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 motor (39) is installed on the bottom plate (19), and the motor (39) is connected to a screw rod (38); the screw rod (38) is threadedly connected to an internal threaded hole (371) on a connecting rod (37); the connecting rod (37) is connected to two pairs of positioning support rods (31); The adjusting slider (36) is provided with a rectangular hole (361) and a first connecting rod movable groove (362) in the middle, and the rectangular hole (361) and the first connecting rod movable groove (362) are connected; the first connecting rod movable groove (362) is provided with a lower cover plate mounting blind hole (363) and a guide ring mounting blind hole (364) around it; sliding blocks (365) are respectively installed at both ends of the bottom of the adjusting slider (36) close to the first connecting rod movable groove (362), and the sliding blocks (365) are provided with a slide rail mounting through hole (366); a motor mounting platform (367) is installed on the other side of the adjusting slider (36), and a motor mounting hole (368) is provided on the motor mounting platform (367); The motor (39) is fixedly installed through a hole (368) and screws; 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); 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 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 also provided at the middle bottom of one side 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) provided on the upper surface of the lower cover plate (35) is also provided on the lower surface.

2. A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe as claimed in claim 1, characterized in that: Two guide rings (33) are installed between the adjusting slider (36) and the lower cover plate (35); 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 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 guide ring mounting blind holes (364) on the adjusting slider (36), the upper cover plate (34), and the lower cover plate (35) through screws; A pair of positioning support rods (31) located between the adjusting slider (36) and the lower cover plate (35) respectively pass through the positioning support rod sliding 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 the positioning support rod sliding 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).

3. A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe as claimed in claim 2, characterized in that: One end of the positioning support rod (31) is a cylinder (311), and the other end is an L-shaped mounting platform (313), and the cylinder (311) and the L-shaped mounting platform (313) are connected via a mounting platform (312), and the cylinder (311) is mounted at the center of the mounting platform (312); an eccentrically mounted connecting rod mounting through hole (314) is provided on the L-shaped mounting platform (313), and the positioning support rod (31) is mounted on the connecting rod (37) via the connecting rod mounting through hole (314).

4. A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe as claimed in claim 1, characterized in that: The connecting rod (37) is a cylindrical connecting rod, and an internal threaded hole (371) for installing a screw rod (38) is opened in the middle of the connecting rod (37). The internal threaded hole (371) on the connecting rod (37) is threadedly connected to the screw rod (38).

5. A positioning mechanism for measuring cross-sectional distortion of a metal bent pipe as claimed in claim 1, characterized in that: A mounting plane (191) for adjusting the slider (36) is provided in the middle of the base plate (19); a connecting rod sliding groove (192) is provided in the middle of the mounting plane (191), and sliding grooves (193) for the sliding block on the adjusting slider (36) are provided on both sides of the connecting rod sliding groove (192); a mounting frame (194) for the slide rail (17) is provided at the bottom of the base plate (19), and a mounting through hole (195) for the slide rail (17) is provided on the mounting frame (194).

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