Metal Ring Band Saw Weld Bending Detection Machine

Abstract

The present invention discloses a metal ring band saw weld bending detection machine, comprising a frame, a pair of rotating arms symmetrically arranged on the frame and rotating towards or in opposite directions around their respective rotating arm axes; a pair of clamping blocks are arranged on one of the rotating arms, a first driving device is arranged on the frame, and drives the pair of rotating arms to rotate towards each other; a pair of pressing blocks are symmetrically arranged on the frame and move towards or in opposite directions along a straight line; a second driving device is arranged on the frame, and drives the pair of pressing blocks to squeeze the saw blades from the outer sides of the saw blades on both sides of the weld; a pressure sensor is arranged on the extrusion surface of one of the pressing blocks; the beneficial effects are: 1. reducing labor intensity; 2. through the device, the stability, convenience and practicality of the weld test are improved, and the quality of the weld can be effectively detected; 3. having an effective protection function, which can prevent the splashing of debris caused by the collapse of the saw band, and improve the personal safety of workers; 4. the pressure at the time of breaking and the displacement of the deformation at the time of breaking can be read.

Description

Technical Field

[0001] The invention relates to the technical field of band saw detection, in particular to a metal ring-shaped band saw weld bending detection machine for automatically detecting the strength of the ring-shaped band saw weld. Background Art

[0002] Existing band saw blades are processed into discs, cut after processing, and then the two ends are welded to form a circular saw band. The weld formed after welding generally needs to be bent to check the quality of the weld. Workers generally bend the weld manually on site for inspection. Sometimes when the worker's force is too strong, the weld is directly broken. Sometimes when the worker's force is too weak, the weld does not deform at all. However, this method of manual bending cannot reflect the quality of the weld. The quality of a broken weld may not be substandard, and the quality of an unbroken weld may not be up to standard. Moreover, this manual bending cannot indicate the pressure at the time of breaking, nor the displacement of the deformation at the time of breaking.

[0003] Therefore, the defects of traditional manual detection are:

[0004] 1. The strength of workers is different, the test is non-standard and unstable, and cannot reflect the true quality of the weld.

[0005] 2. For larger saw belts, a lot of effort is required during the bending process, and the workers are very strong.

[0006] 3. The breaking process produces cracked welding slag, and the saw belt is relatively sharp, causing personal injury to workers;

[0007] 4. The pressure at fracture and the displacement of deformation cannot be obtained. Summary of the invention

[0008] The purpose of the present invention is to solve the above-mentioned technical problems and to provide a new detection tool which can provide good stability, convenience, practicality and labor saving, which can effectively detect the quality of welds and can read the pressure, deformation displacement and metal ring band saw weld bending detection machine.

[0009] In order to achieve the above object, the present invention adopts the following technical scheme: a metal ring band saw weld bending detection machine, comprising:

[0010] A frame, the frame being used to support components;

[0011] A pair of rotating arms, the pair of rotating arms are symmetrically arranged on the frame and rotate in opposite directions or towards each other around their respective rotating arm axes;

[0012] Two pairs of clamping blocks, one pair of the clamping blocks is arranged on one of the rotating arms, and the other pair of the clamping blocks is arranged on the other rotating arm, for clamping the annular band saw on both sides of the weld;

[0013] A first driving device, the first driving device driving the pair of rotating arms to rotate is arranged on the frame, so that the weld joint moves downward and the saw blades on both sides of the weld joint rotate around the weld joint toward each other until the angle formed by the saw blades on both sides with the weld joint as the intersection line is an acute angle;

[0014] A pair of pressing blocks, the pair of pressing blocks are symmetrically arranged on the frame and move towards or in opposite directions along a straight line;

[0015] A second driving device, the second driving device is arranged on the frame, driving a pair of the pressing blocks to squeeze the saw blade from the outside of both sides of the weld of the annular band saw;

[0016] A pressure sensor, the pressure sensor being arranged on at least one of the pressing blocks on the pressing surface, and being used to detect the pressing force;

[0017] A displacement sensor is arranged on a frame below one of the pressing blocks, and a displacement detection plate is arranged on the corresponding pressing block.

[0018] In order to simplify the structure and facilitate installation, a further preferred technical solution is that the rotating arm includes a toothed disc at least partially provided with meshing teeth, and the toothed disc is connected to an arm plate extending radially outward.

[0019] In order to arrange the rotating arm vertically, facilitate manual operation of clamping the saw blade, and observe the bending action of the saw blade, a further preferred technical solution is that a rotating arm bracket is provided on the frame, and a pair of the rotating arms are symmetrically arranged on one side surface of the rotating arm bracket.

[0020] In order to facilitate manual operation of clamping the saw blade and cooperate with the pressure block to observe the bending action of the saw blade, a further preferred technical solution is that each pair of the clamping blocks is installed on the side of the arm plate of the pivot arm close to the pivot arm bracket, and extends from one side of the pivot arm bracket to the other side of the pivot arm bracket.

[0021] In order to simplify the structure and facilitate installation, a further preferred technical solution is that each pair of clamping blocks includes an L-shaped fixed block and a rectangular telescopic block, and a pair of clamping surfaces of the telescopic block and the fixed block are matching wedge-shaped surfaces.

[0022] In order to facilitate manual operation and realize automated operation, a further preferred technical solution is that a clamping cylinder is provided on the other side of the arm plate of the rotating arm corresponding to each pair of the clamping blocks, and the piston rod of the clamping cylinder passes through the arm plate and the fixed block and is fixedly connected to the telescopic block.

[0023] In order to facilitate manual operation and realize automated operation, a further preferred technical solution is that the first driving device includes a first cylinder, a first guide rail, a first slider, and a first rack; the first cylinder is vertically installed in the middle position on one side of a pair of the rotating arms of the frame, and a vertically arranged first guide rail is provided on the side of the first cylinder close to the rotating arm, a vertically arranged first slider is provided on the first guide rail, and a vertically arranged first rack is provided on the first slider, and the first rack has external teeth on both sides that respectively mesh with the toothed discs on the pair of the rotating arms, and the piston rod of the first cylinder is fixedly connected to the first rack.

[0024] In order to realize the relative movement of the pressure block and facilitate the observation of the bending action of the saw blade, a further preferred technical solution is that a pair of columns are provided on the other side of the swing arm bracket, each of the columns is provided with a screw rod and a first guide rod placed parallel to the screw rod, each of the first guide rods is provided with a nut slider that cooperates with the screw rod thread, and each of the pressure blocks is fixedly connected to a corresponding nut slider; a first driving shaft is also provided between the pair of columns, and first driving gears are respectively provided at both ends of the first driving shaft, and a second driving gear is correspondingly provided at one end of each of the screw rods, and the first driving gear is meshed with the second driving gear on the corresponding side for transmission.

[0025] In order to facilitate manual operation and realize automated operation, a further preferred technical solution is that the second driving device includes a hydraulic cylinder, a second guide rail, a second slider, a second rack, a second gear, a pair of transmission sprockets and a transmission chain; the second guide rail is vertically installed on the frame, the second guide rail is provided with a vertically arranged second slider, the second slider is provided with a vertically arranged second rack, the upper end of the second guide rail is provided with a hydraulic cylinder fixed to the frame, the piston rod of the hydraulic cylinder is fixedly connected to the second rack, the second rack passes through the frame and meshes with the second gear, the second gear is provided at one end of the second driving shaft, the other end of the second driving shaft is provided with a second sprocket, the corresponding end of the first driving shaft is provided with a first sprocket, and the first sprocket and the second sprocket are connected by a transmission chain.

[0026] In order to read the displacement deformation and realize displacement adjustment for different products, a further preferred technical solution is that the displacement detection plate is arranged on one of the nut sliders, a third guide rail is provided on the frame corresponding to the displacement detection plate, a third slider is provided on the third guide rail, the displacement sensor is arranged on the third slider and cooperates with the displacement detection plate, and a second scale is provided on the frame corresponding to the displacement sensor; a first scale is also provided on the nut slider, and a scale indication frame is provided on the other nut slider corresponding to the first scale.

[0027] Compared with the prior art, the beneficial effects of the present invention are: 1. No manual bending is required, thus reducing the labor intensity;

[0028] 2. This device improves the stability, convenience and practicality of weld tests and can effectively detect weld quality;

[0029] 3. It has an effective protective function. During the weld test, it can prevent the debris generated by the saw belt from splashing, thus improving the personal safety of workers;

[0030] 4. The pressure at the time of breaking and the displacement of the deformation at the time of breaking can be read. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is one of the axonometric drawings of the present invention;

[0032] Figure 2 This is the second axonometric drawing of the present invention;

[0033] Figure 3 This is the third axonometric drawing of the present invention;

[0034] Figure 4 This is the fourth axonometric drawing of the present invention;

[0035] Figure 5 It is a cross-sectional view of the clamping block of the present invention.

[0036] In the figure: 1. Frame; 1a. Workbench; 2. Second guide rail; 3. Hydraulic cylinder; 4. Hydraulic cylinder bracket; 5. Protective cover; 6. Clamping block; 6a. Telescopic block; 6b. Fixed block; 7. Clamping cylinder; 8. Swivel arm; 8a. Arm plate; 8b. Toothed disc; 9. Swivel arm bracket; 10. Alignment block; 11. First rack; 12. First slider; 13. Guide rod; 14. Connecting frame; 15. First cylinder; 16. First guide rail; 17. Guide wheel; 17a. Guide wheel shaft; 18. Press block; 19. Nut slider; 20. Column; 21. Bracket; 22. Displacement detection plate; 23. Third guide rail; 24. Third slider; 25. Displacement sensor; 26. First scale; 27. The second scale; 28. The second guide rod; 29. ​​The cylinder bracket; 30. The scale indicator frame; 31. The first drive shaft; 32. The first guide rod; 33. The connecting plate; 34. The screw rod; 35a. The second sprocket; 35b. The first sprocket; 36. The fixing plate; 37. The second rack; 38. The second gear; 39. The second drive shaft; 40a. The first drive gear; 40b. The second drive gear; 41. The guide block; 42. The cylinder displacement sensor; 43. The detection rod; 44. The swing arm shaft; 45. The pressure sensor. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0038] like Figure 1 As shown, a metal ring band saw weld bending detection machine comprises a frame 1, wherein the frame 1 is a frame structure for supporting parts, an upper end of the frame 1 is a workbench 1a for installing parts, and a protective plate is arranged around the frame 1 to form a closed box;

[0039] A pair of rotating arms 8 are provided on the workbench 1a of the frame 1, and the pair of rotating arms 8 are symmetrically arranged on the frame 1 and rotate in opposite directions around their respective rotating arm axes;

[0040] like Figure 3 As shown, specifically, a pair of pivot arm brackets 9 are symmetrically arranged on the workbench 1a, and there is a certain distance between the adjacent sides of the two pivot arm brackets 9, and the distant side of each pivot arm bracket 9 is fixed to the workbench 1a through a bracket 21, and a notch is provided on the upper end of the pivot arm bracket 9 close to the bracket 21; the lower end of the pivot arm bracket 9 is at a distance from the workbench 1a, and a pivot arm shaft 44 whose axis is perpendicular to the side is fixedly connected to the same side of each pivot arm bracket 9. In order to simplify the structure and facilitate installation, the pivot arm 8 includes a toothed disc 8b, and the toothed disc 8b has an arm plate 8a extending outward in the radial direction. The toothed disc 8b of the pivot arm 8 is mounted on the pivot arm shaft 44 through a bearing, so that the pivot arm 8 is installed parallel to the pivot arm bracket 9, and the arm plate 8a is located at the notch of the pivot arm bracket 9;

[0041] A pair of clamping blocks 6 are provided at the upper end of the arm plate 8a of each rotating arm 8, one pair of the clamping blocks 6 is provided on one rotating arm 8, and another pair of the clamping blocks 6 is provided on another rotating arm 8, for clamping the annular band saw on both sides of the weld;

[0042] like Figure 5As shown, specifically, each pair of clamping blocks 6 includes an L-shaped fixed block 6b and a rectangular telescopic block 6a, the telescopic block 6a is placed in the L-shaped notch of the fixed block 6b to form two matching surfaces, one of the matching surfaces of the telescopic block 6a and the fixed block 6b is a clamping surface, the clamping surface is a wedge-shaped surface, and the other matching surface is a connecting surface, the connecting surface is a plane, each pair of the clamping blocks 6 is installed on the side of the arm plate 8a of the rotating arm 8 close to the rotating arm bracket 9, and extends from one side of the rotating arm bracket 9 to the other side of the rotating arm bracket 9, and makes the clamping surface horizontally face the other side of the rotating arm bracket 9; that is, the fixed plate 6b is fixed on the arm plate 8a, the telescopic block 6a has a through hole extending to the connecting surface, and the corresponding connecting surface of the fixed block 6b has a threaded hole, and a locking screw passes through the connecting surface and is threadedly connected to the fixed block 6b to form manual locking;

[0043] Furthermore, in order to facilitate manual operation and realize automated operation, a clamping cylinder 7 is provided on the other side of the arm plate 8a of the rotating arm 8 corresponding to each pair of the clamping blocks 6, and the clamping cylinder 7 is fixed on the arm plate 8a. Through holes are provided on the arm plate 8a and the fixed block 6b, and the piston rod of the clamping cylinder 7 passes through the arm plate 8a and the fixed block 6b and is fixedly connected to the telescopic block 6a.

[0044] Furthermore, in order to realize bending automatically, a first driving device is provided on the workbench 1a, and the first driving device is arranged on the frame 1, driving a pair of the rotating arms 8 to rotate toward each other, so that the saw blades on both sides of the weld rotate toward each other around the weld, until the angle formed by the saw blades on both sides with the weld as the intersection line is an acute angle. In order to realize the rotation of the rotating arms 8 toward each other, the first driving device can adopt a worm motor driving structure. Specifically, the worm is provided with two sections of meshing teeth with opposite tooth directions, which are respectively meshed with the toothed discs of the rotating arms 8. The worm is driven by the driving motor to rotate, and the rotating arms 8 are driven to rotate toward each other or in the opposite direction.

[0045] The first driving device can also adopt a rack cylinder structure. Specifically, the first driving device includes a first cylinder 15, a first guide rail 16, a first slider 12, and a first rack 11; the first cylinder 15 is vertically installed in the middle position of one side of the frame 1 where a pair of rotating arms 8 are located, and the first cylinder 15 is fixed by a cylinder bracket 29 fixed on the workbench 1a. A vertically arranged first guide rail 16 is provided on the side of the first cylinder 15 close to the rotating arm 8, and the first guide rail 16 is fixed on the cylinder bracket 29 on the side of the first cylinder 15. A vertically arranged first slider 12 is provided on the first guide rail 16, and the first slider 12 is moved along The first guide rail 16 moves vertically up and down, the length of the first slider 12 is greater than that of the first guide rail 16, a vertically arranged first rack 11 is provided on the first slider 12, the first rack 11 is fixed on the first slider 12, and moves vertically up and down synchronously, the first rack 11 has external teeth on both sides respectively meshing with a pair of toothed discs 8b of the rotating arm 8, the piston rod of the first cylinder 15 passes through the workbench 1a, the lower end of the first rack 11 is fixedly connected to a second guide rod 28, the lower end of the second guide rod 28 passes through the workbench 1a and is fixedly connected to the piston rod of the first cylinder 15, and a through hole is provided on the corresponding workbench 1a;

[0046] Further, a guide rod 13 is provided at the upper end of the first slider 12, and the guide rod 13 is fixedly connected to the first slider 12 through a connecting frame 14. A guide block 41 is fixed on the base of the first cylinder 15. The lower end of the guide rod 13 passes through the guide block 41 and is fixedly connected to a cylinder displacement sensor 42. The lower end of the guide block 41 is also fixedly connected to a detection rod 43 that cooperates with the displacement sensor 42 to detect the displacement of the first rack 11.

[0047] Further, an alignment block 10 is fixedly connected to the middle of the upper end of the first rack 11. The alignment block 10 is a rectangular block, which is mounted on the first rack 11 through a rectangular plate. The alignment block 10 is located above the rotating arm bracket 9 and is aligned with the middle position of a pair of rotating arm brackets 9;

[0048] like Figure 2As shown, further, a pair of pressure blocks 18 are symmetrically arranged on the frame 1 and move toward or in opposite directions along a straight line; when the first driving device stops moving, the pair of pressure blocks 18 are located on the outer sides of the saw blades on both sides of the weld, and the pair of pressure blocks 18 can be directly installed at the front ends of a pair of hydraulic cylinder piston rods and driven simultaneously by a hydraulic motor to move toward or in opposite directions, or a screw slider mechanism is adopted. Specifically, a column 20 is respectively provided on the other side of a pair of swing arm brackets 9, close to one end of the bracket 21, each of the columns 20 is provided with a screw rod 34 parallel to the swing arm bracket 9 and placed horizontally, and a first guide rod 32 placed parallel to the screw rod 34, a screw rod mounting hole is provided at the upper end of the column 20, the screw rod 34 is rotatably mounted on the column 20 through a bearing, and the first guide rod 32 is fixedly mounted on the middle part of the column 20 below the screw rod 34, and each of the first guide rods 32 is provided with a nut slider 19 and the screw rod 34 Threaded connection, the nut slider 19 is an inverted U-shaped block, the lower end of the U-shaped block has a through hole that is slidably matched with the first guide rod 32, the upper end of the U-shaped block has a through threaded hole that is threadedly matched with the screw rod 34, the pressing block 18 is fixedly connected to the corresponding nut slider 19 through a connecting plate 33; a first driving shaft 31 is also provided between a pair of the columns 20, and the two ends of the first driving shaft 31 are rotatably connected to the lower part of the column 20 through bearings, and the two ends of the first driving shaft 31 are respectively provided with a first driving gear 40a, and the corresponding end of each screw rod 34 is provided with a second driving gear 40b, and the first driving gear 40a is meshed with the second driving gear 40b on the corresponding side for transmission, so that the two ends of the first driving shaft 31 are respectively rotatably connected to the screw rod 34 at the corresponding end through a pair of meshing driving gears, and a protective cover 5 is provided outside the driving gear, and the protective cover 5 is fixed on the workbench 1a;

[0049] Furthermore, a guide wheel 17 is provided on the rotating arm bracket above each pressing block 18, and the guide wheel 17 is rotatably mounted on a guide wheel shaft 17a, and the guide wheel shaft 17a is vertically fixedly mounted on the rotating arm bracket 9;

[0050] Furthermore, a second driving device is arranged on the frame, and when the first driving device stops, a pair of the pressing blocks 18 are driven to squeeze the saw blades from the outer sides of the saw blades on both sides of the weld, and the second driving device can be directly connected to the first driving shaft 31 by a hydraulic motor or an electric motor;

[0051] The second driving device can also adopt a gear rack structure to be rotatably connected with the first driving shaft 31; specifically, the gear rack structure includes a hydraulic cylinder 3, a second guide rail 2, a second slider, a second rack 37, a second gear 38, a pair of transmission sprockets and a transmission chain; the second guide rail 2 is vertically installed on the frame 1, a vertically arranged second slider is provided on the second guide rail 2, the second slider slides with the second guide rail 2, a vertically arranged second rack 37 is provided on the second slider, the second rack 37 is fixedly connected to the second guide rail 2, a hydraulic cylinder 3 fixed to the frame 1 is provided at the upper end of the second guide rail 2, the hydraulic cylinder 3 is fixed to the workbench 1a through a hydraulic cylinder bracket 4 on one side of the second guide rail 2, the piston rod of the hydraulic cylinder 3 is fixedly connected to the second rack 37, the second rack 37 passes through the frame 1 and meshes with the second gear 38, the second gear 37 is arranged at one end of the second driving shaft 39, and the second driving shaft A second sprocket 35a is provided at the other end of 39, and a first sprocket 35b is provided at one end of the corresponding first driving shaft 31, and the first sprocket 35b is connected to the second sprocket 35a through a transmission chain; specifically, the second rack 37 passes through the workbench 1a at the upper end of the frame 1 to the lower end of the workbench 1a and meshes with the second gear 38, and a fixed plate 36 is provided at the lower end surface of the corresponding workbench 1a, and a second driving shaft 39 is provided on the fixed plate 36, and the second driving shaft 39 is rotatably connected to the fixed plate 36 through a bearing, and the second gear 37 is fixed to one end of the second driving shaft 39, and a second sprocket 35a is provided at the other end of the second driving shaft 39, and a first sprocket 35b is provided at one end of the corresponding first driving shaft 31, and the first sprocket 35b is connected to the second sprocket 35a through a transmission chain; that is, the second driving shaft 39 is connected to the first driving shaft 31 through a pair of transmission sprockets and a transmission chain;

[0052] like Figure 4 As shown, further, the pressing block 18 is a rectangular pressing block with a rounded corner at the upper end, one of the pressing blocks 18 is provided with a mounting hole penetrating to the extrusion surface of the pressing block 18, and a pressure sensor 45 is arranged in the mounting hole for detecting pressure;

[0053] Furthermore, in order to read the displacement deformation and realize displacement adjustment for different products, a first scale 26 and a displacement detection plate 22 are provided on one of the nut sliders 19, and a scale indicator frame 30 is provided on the other nut slider 19 corresponding to the first scale 26; a third guide rail 23 is provided on the frame 1 corresponding to the displacement detection plate 22, a third slider 24 is provided on the third guide rail 23, and a displacement sensor 25 is provided on the third slider 24 to cooperate with the displacement detection plate 22;

[0054] Specifically, an L-shaped support plate is provided at the lower end of the connecting plate 33 of the nut slider 19 and the pressing block 18 near the pressing block 18, and a first scale 26 is fixed at the lower end of the L-shaped support plate. Another connecting plate 33 of the nut slider 19 and the pressing block 18 is provided with a scale indicator frame 30 corresponding to the first scale 26. The first scale 26 passes through the scale indicator frame 30 and moves synchronously with the pressing block 18 to indicate the displacement. The lower end of the connecting plate 33 of the nut slider 19 and the pressing block 18 near the L-shaped support plate is also provided with a displacement A detection plate 22, a third guide rail 23 is provided on the workbench 1a corresponding to the displacement detection plate 22, the third guide rail 23 is parallel to the movement direction of the pressing block 18 and is fixedly arranged on the workbench 1a, a third slide block 24 with sliding fit is provided on the third guide rail 23, a fixedly connected displacement sensor 25 is provided on the third slide block 24, and a second scale 27 is provided on the frame 1 corresponding to the displacement sensor 25, and the displacement of the pressing block 18 and the stroke of the hydraulic cylinder 3 can be changed by adjusting the position of the displacement sensor 25 by the second scale 27;

[0055] The working principle of the present invention is to place both ends of the weld of the circular band saw on the clamping block 6, and align the weld with the alignment block 10, then start the clamping cylinder 7 through the control cabinet, the clamping cylinder 7 works, the clamping block 6 clamps the circular band saw, and then start the first cylinder 15, the first cylinder 15 drives the first rack 11 to move downward along the first guide rail 16 through the second guide rod 28, the first rack 11 drives the rotating arm 8 to rotate towards each other, the two sides of the weld of the circular band saw rotate towards each other, and the weld of the circular band saw moves between the pair of pressing blocks 18 below under the action of a pair of guide wheels 17, and at the same time, the guide rod 13 at the upper end of the first slider 12 drives the cylinder displacement sensor at the lower end 42 moves down synchronously. When the cylinder displacement sensor 42 reaches the set position of the detection rod 43, the first cylinder 15 stops working and the hydraulic cylinder 3 starts working. The hydraulic cylinder 3 drives the pressure block 18 to move toward each other along the first guide rod 32 through the second driving device to squeeze the saw blades on both sides of the weld of the annular band saw. At the same time, the displacement detection plate 22 on the pressure block 18 moves synchronously. Through the displacement amount preset by the displacement sensor 25, when the displacement detection plate 22 reaches the preset position of the displacement sensor 25, the hydraulic cylinder 3 stops driving, and the pressure sensor 45 feeds back the pressure signal to the controller and displays the value. At this time, it can also be directly observed whether the annular band saw is broken at the weld.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Metal ring band saw weld bending detection machine, characterized in that: include: A frame, wherein the frame is used for supporting parts; A pair of rotating arms rotating around respective rotating arm axes are symmetrically arranged on the frame; A pair of pressing blocks, the pair of pressing blocks are symmetrically arranged on the frame and move towards or in opposite directions along a straight line; The frame is provided with a rotating arm bracket, and a pair of the rotating arms are symmetrically arranged on one side surface of the rotating arm bracket; a pair of columns are provided on the other side surface of the rotating arm bracket, each of the columns is provided with a screw rod and a first guide rod placed parallel to the screw rod, each of the first guide rods is provided with a nut slider that cooperates with the screw rod thread, and each pressure block is fixedly connected to a corresponding nut slider; a first driving shaft is also provided between the pair of columns, and first driving gears are respectively provided at both ends of the first driving shaft, and a second driving gear is correspondingly provided at one end of each of the screw rods, and the first driving gear is meshed with the second driving gear on the corresponding side for transmission; Two pairs of clamping blocks, one pair of the clamping blocks is arranged on one of the rotating arms, and the other pair of the clamping blocks is arranged on the other rotating arm, for clamping two sides of the weld of the annular band saw; A first driving device, the first driving device driving the pair of rotating arms to rotate is arranged on the frame; the first driving device includes a first cylinder, a first guide rail, a first slider, and a first rack; the first cylinder is vertically installed at the middle position on one side of the pair of rotating arms of the frame, a vertically arranged first guide rail is provided on the side of the first cylinder close to the rotating arm, a vertically arranged first slider is provided on the first guide rail, a vertically arranged first rack is provided on the first slider, both sides of the first rack have external teeth respectively meshing with the toothed discs on the pair of rotating arms, and the piston rod of the first cylinder is fixedly connected to the first rack; A second driving device, the second driving device is arranged on the frame, driving a pair of the pressing blocks to extrude the saw blades from the outside on both sides of the weld of the annular band saw; the second driving device includes a hydraulic cylinder, a second guide rail, a second slider, a second rack, a second gear, a pair of transmission sprockets and a transmission chain; the second guide rail is vertically installed on the frame, a vertically arranged second slider is provided on the second guide rail, a vertically arranged second rack is provided on the second slider, a hydraulic cylinder fixed to the frame is provided at the upper end of the second guide rail, a piston rod of the hydraulic cylinder is fixedly connected to the second rack, the second rack passes through the frame and meshes with the second gear, the second gear is provided at one end of the second driving shaft, a second sprocket is provided at the other end of the second driving shaft, a first sprocket is provided at one end of the corresponding first driving shaft, and the first sprocket is connected to the second sprocket through a transmission chain; A pressure sensor, the pressure sensor being arranged on at least one of the pressing blocks on the pressing surface, and being used to detect the pressing force; A displacement sensor, wherein the displacement sensor is arranged on a frame below one of the pressure blocks, and a displacement detection plate is arranged on the corresponding pressure block; the displacement detection plate is arranged on one of the nut sliders, and a third guide rail is arranged on the frame corresponding to the displacement detection plate, and a third slider is arranged on the third guide rail; the displacement sensor is arranged on the third slider and cooperates with the displacement detection plate, and a second scale is also arranged on the frame corresponding to the displacement sensor; a first scale is also arranged on the nut slider, and a scale indication frame is arranged on the other nut slider corresponding to the first scale.

2. The metal ring band saw weld bending detection machine as claimed in claim 1, characterized in that: The rotating arm comprises a toothed disc at least partially provided with meshing teeth, and an arm plate extending radially outward is connected to the toothed disc.

3. The metal ring band saw weld bending detection machine as claimed in claim 2, characterized in that: Each pair of the clamping blocks is installed on the side of the arm plate of the rotating arm close to the rotating arm bracket, and extends from one side of the rotating arm bracket to the other side of the rotating arm bracket.

4. The metal ring band saw weld bending detection machine as claimed in claim 3, characterized in that: Each pair of clamping blocks comprises an L-shaped fixed block and a rectangular telescopic block, and a pair of clamping surfaces of the telescopic block and the fixed block are matched wedge-shaped surfaces.

5. The metal ring band saw weld bending detection machine as claimed in claim 4, characterized in that: A clamping cylinder is provided on the other side of the arm plate of the rotating arm corresponding to each pair of the clamping blocks, and the piston rod of the clamping cylinder passes through the arm plate and the fixed block and is fixedly connected to the telescopic block.

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