Forging bending deformation inspection device

Abstract

The invention provides a forging bending deformation inspection device, which belongs to the field of forging detection and comprises two positioning units. The positioning unit comprises a fixing ring and three end limiting assemblies. The end portion limiting assembly comprises a flexible detection plate, the inner side of which is provided with an array strain gauge; the frame plate is fixedly arranged on the outer ring surface of the fixing ring; the rotary driving part is rotationally arranged on the frame plate; the limiting plate and the spline shaft are in sliding fit; the limiting plate is fixedly erected on the back of the flexible detection plate; a movable plate and two adjusting connecting rods; two ends of each adjusting connecting rod are respectively hinged with the same ends of the movable plate and the flexible detection plate; the threaded rod comprises a screw and a ball screw which are fixedly connected, and the ball screw end of the threaded rod sequentially penetrates through the rotary driving part, the frame plate, the fixed ring and the movable plate and is fixedly connected with the spline shaft; and the spline shaft is connected with the flexible detection plate through a pressure storage spring. According to the device, the two ends of the cylindrical forge piece can be coaxially clamped before bending detection, and the bending state of the ends can be accurately recognized.

Description

Technical Field

[0001] The invention relates to the technical field of bending detection equipment, and in particular to a forging bending deformation detection device. Background Art

[0002] Cylindrical forgings are a common forging part that has the function of bearing rotational forces and are usually made of carbon steel, alloy steel, stainless steel and other materials. Its manufacturing process involves precise forging technology and subsequent machining operations, so the production cost is relatively high. Cylindrical forgings are divided into two types: cylindrical and conical. Depending on specific needs, the process may include steps such as blanking, punching, and reaming to ensure that the forgings have sufficient forging ratios and are fully forged. However, due to various factors such as uneven heating temperature on the cross section of the billet, or the non-coincidence of the rotation center of the clamp and the striking center of the hammer, or the large difference in adjacent step diameters of forged forgings with concave stops, or improper placement methods after forging, the cylindrical forgings may bend. Therefore, the cylindrical forgings after forging need to be bent. Correction.

[0003] Bending correction is a very important link in the manufacturing process of cylindrical forgings. The purpose is to control and correct the rebound and deformation of the forgings during the bending deformation process by applying pressure or heat. Before bending correction, the cylindrical forgings need to be subjected to bending detection, and pressure correction is performed after obtaining the bending deformation points. In the prior art, the two ends of the cylindrical forgings are usually fixed, and the overall convex state of the rod body is scanned to determine whether a bending state has occurred. However, in the prior art, the ends of the cylindrical forgings are usually fixed by clamping. In order to accurately obtain the points of the bending apex, the two ends need to be on the same axis to avoid position differences at the two ends. In the prior art, the coaxiality of the two ends of the cylindrical forgings is poor when clamped. In addition, due to its special manufacturing process, the cylindrical forgings are prone to bending at both ends. The prior art performs bending deformation detection based on the end limit, which is easily affected by the end bending when the ends are clamped. When different clamping points are generated, the judgment of the bending deformation of the cylindrical forgings will be affected. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a forging bending deformation inspection device, which can accurately coaxially clamp the two ends of a cylindrical forging before bending detection and can accurately identify the bending state of the end of the cylindrical forging.

[0005] The present invention provides the following technical solutions.

[0006] A forging bending deformation inspection device, comprising: Two positioning units connected by a connecting piece; the positioning unit comprises a fixing ring and three end stop assemblies; The end stop assembly comprises: A flexible detection plate, on the inner side of which is provided an array strain gauge; the array strain gauges on the inner side of the flexible detection plates of the three end limit assemblies are all in contact with the ends of the cylindrical forgings; A frame plate, fixedly arranged on the outer ring surface of the fixing ring; A rotating driving member is rotatably arranged on the frame plate; a pair of rotating driving members corresponding to each other in the two positioning units are synchronized by a synchronization component; A limit plate and a spline shaft; the limit plate is fixedly mounted on the back of the flexible detection plate, and the spline shaft and the limit plate spline are slidably matched; A movable plate and two adjusting connecting rods; both ends of each adjusting connecting rod are respectively hinged to the same end of the movable plate and the flexible detection plate; The threaded rod includes a screw rod and a ball screw that are fixedly connected. The ball screw end of the threaded rod passes through the rotating drive member, the frame plate, the fixed ring and the movable plate in sequence, and is fixedly connected to the spline shaft; the end of the spline shaft is connected to the back of the flexible detection plate through a pressure storage spring; the screw end and the ball screw end of the threaded rod are respectively threadedly matched with the rotating drive member and the movable plate, and the threaded rod is slidably matched with the frame plate and the fixed ring.

[0007] Preferably, it also includes a moving component and a detection unit; the moving component is arranged between the two fixed rings; the detection unit is mounted on the moving component, and is driven to move by the moving component to detect the distance between the surface of the cylindrical forging and the detection unit.

[0008] Preferably, the rotary drive member includes a driven gear and a motor drive assembly; both ends of the bottom of the frame plate are fixedly connected to the outer ring surface of the fixed ring through a first frame rod; the driven gear is rotatably arranged on the frame plate; the motor drive assembly includes: A first motor, fixedly arranged at the bottom of the frame plate, with an output shaft passing through the frame plate; A driving gear, the bottom of which is fixedly connected to the output shaft of the first motor; the driving gear is meshed with the driven gear.

[0009] Preferably, the synchronization component comprises: Two synchronous pulleys are respectively fixedly connected to the tops of the two driving gears of a pair of the rotating driving members corresponding to each other in the two positioning units; The synchronous belt is respectively connected with the two synchronous belt wheels to realize transmission.

[0010] Preferably, two groups of symmetrically arranged auxiliary limiters are further included; the auxiliary limiters include: Three positioning arc-shaped pieces; two adjacent ends of the positioning arc-shaped pieces are connected by adjusting springs respectively; Three connecting rods; two ends of each connecting rod are spherically matched with a side surface of a flexible detection plate and a side surface of a positioning arc-shaped piece through a joint ball.

[0011] Preferably, the connecting member comprises a plurality of polished rods; both ends of the plurality of polished rods are respectively fixedly connected to opposite end faces of the two fixing rings; and the detection unit comprises: a gear ring; a plurality of the polished rods passing through the gear ring and slidingly cooperating with the gear ring; A plurality of circumferential moving parts; each of the circumferential moving parts comprises a second motor, a moving platform and a moving gear; a notch is provided on one side of the moving platform, and the bottom of the notch abuts against the outer ring surface of the gear ring; the moving gear is arranged in the notch and is rotatably connected to the top and bottom of the moving platform through a rotating shaft; the moving gear meshes with the gear ring; the second motor is fixedly arranged on one end surface of the moving platform, and its output shaft is drivingly connected to the rotating shaft; A plurality of laser rangefinders are respectively mounted on the other end surface of the moving platform, with the test heads facing the center of the gear ring.

[0012] Preferably, the moving component comprises: A third motor is fixedly arranged on one end surface of one of the fixing rings; A lead screw passes through the gear ring and is threadedly matched with the gear ring; two ends of the lead screw are respectively rotatably connected to one end surface of another fixed ring and are drivingly connected to the output shaft of the third motor.

[0013] Preferably, a reset nut is fixedly provided on the upper end of each spline shaft; and the end of the reset nut is fixedly connected to the ball screw end of the threaded rod.

[0014] Preferably, the limiting plate is fixedly connected to the back of the flexible detection plate via a plurality of second rack rods.

[0015] Preferably, the end of the screw rod end of the threaded rod is fixedly connected with an end plate.

[0016] Beneficial effects of the present invention: The present invention proposes a forging bending deformation inspection device, which has two symmetrically arranged positioning units to perform end fixing operations, and adopts a transmission structure of a threaded rod and a nut to drive a flexible detection plate to perform three-point positioning and clamping on the end of a cylindrical forging. The feed amounts of the three positioning and clamping points at both ends are the same, ensuring that each positioning and clamping point is parallel to the main axis of the cylindrical forging or the detection device. During continuous feeding, the force on the three flexible detection plates changes from point contact to line contact, or even curved surface contact clamping, gradually straightening the cylindrical forging, so that the two ends of the cylindrical forging are maintained on the same axis, ensuring the subsequent bending deformation points, that is, the accurate acquisition of multiple maximum deformation points. The end bending detection is realized based on coaxial clamping at both ends. Therefore, the device continues to drive and move after clamping. After the threaded rod is disengaged from the spline, it can rotate freely, and then the transmission mode of the slider screw is adopted to drive the movable plate to move upward. The connecting rod structure is used to gather the flexible detection plate to the surface of the cylindrical forging to form a multi-plate surface wrapping. According to the same wrapping action and amplitude at both ends of the flexible detection plate, the corresponding strain gauge force measurement on the flexible detection plate is used to judge whether the end has bending deformation, thereby realizing the judgment of the bending deformation at the position of the clamped end, and providing a data basis for subsequent correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is an overall assembly structure diagram of a forging bending deformation inspection device according to an embodiment of the present invention; Figure 2 It is a partial structural diagram of the overall assembly structural diagram of the forging bending deformation inspection device according to an embodiment of the present invention; Figure 3 1 is a partial structural diagram A of a forging bending deformation inspection device according to an embodiment of the present invention; Figure 4 1 is a partial B structural diagram of a forging bending deformation inspection device according to an embodiment of the present invention; Figure 5 1 is a partial C structural diagram of a forging bending deformation inspection device according to an embodiment of the present invention; Figure 6 It is a side view of a forging bending deformation inspection device according to an embodiment of the present invention.

[0018] Among them, 1. threaded rod; 2. fixed ring; 3. adjusting connecting rod; 4. flexible detection plate; 5. laser rangefinder; 6. moving platform; 7. gear ring; 8. light rod; 9. lead screw; 10. frame plate; 11. first frame rod; 12. moving plate; 13. reset nut; 14. spline shaft; 15. limit plate; 16. pressure storage spring; 17. array strain gauge; 18. adjusting spring; 19. positioning arc plate; 20. connecting rod; 21. joint ball; 22. second frame rod; 23. first motor; 24. synchronous belt; 25. driving gear; 26. synchronous pulley; 27. end plate; 28. driven gear; 29. ​​second motor; 30. moving gear. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0021] Example Bending correction is a very important step in the manufacturing process of cylindrical forgings. The purpose is to control and correct the rebound and deformation of the forgings during the bending deformation process by applying pressure or heat. Before bending correction, the cylindrical forgings need to be tested for bending, and pressure correction is performed after the bending deformation points are obtained. In the prior art, the two ends of the cylindrical forgings are usually fixed, and the overall convex state of the rod body is scanned to determine whether a bending state has occurred. However, in the prior art, the ends of the cylindrical forgings are usually fixed by clamping. In order to accurately obtain the points of the bending apex, the two ends need to be on the same axis to avoid position differences at the two ends. The coaxiality of the two ends of the cylindrical forgings in the prior art is poor. In addition, due to their special manufacturing process, cylindrical forgings are prone to bending at both ends. The prior art performs bending deformation detection based on the end limit, so it is difficult to determine the bending of the ends, and is easily affected by the bending of the ends when the ends are clamped. When different clamping points are generated, it will affect the judgment of the bending deformation of the cylindrical forgings. To this end, this embodiment proposes a forging bending deformation inspection device, and the specific structure is as follows: Figure 1 As shown, it comprises two positioning units connected by a connecting piece, the positioning unit comprises a fixing ring 2 and three end stop assemblies. The connecting piece comprises a plurality of light rods 8; the two ends of the plurality of light rods 8 are respectively fixedly connected to the opposite end faces of the two fixing rings 2.

[0022] This embodiment provides a detailed structural diagram, Figure 2 This is a schematic diagram of the detailed structure diagram. Figure 3 , Figure 4 and Figure 5 It is divided into local A structure diagram, local B structure diagram and local C structure diagram. Figure 6 It is a side view.

[0023] The end limit assembly includes a flexible detection plate 4, a frame plate 10, a rotary drive member, a limit plate 15, a spline shaft 14, a moving plate 12, a threaded rod 1 and two adjusting connecting rods 3. Figure 3 and Figure 5As shown. An array strain gauge 17 is arranged inside the flexible detection plate 4; the inner array strain gauges 17 of the three flexible detection plates 4 are in contact with the ends of the cylindrical forgings to determine the bending condition of the ends; the frame plate 10 is fixedly arranged on the outer ring surface of the fixing ring 2; the rotary drive member is rotatably arranged on the frame plate 10; a pair of rotary drive members corresponding to each other in the two positioning units are synchronized through a synchronization component; the limit plate 15 is fixedly arranged on the back of the flexible detection plate 4 and is fixedly connected through a plurality of second frame rods 22. The spline shaft 14 is spline-slidingly matched with the limit plate 15; the two ends of each adjusting connecting rod 3 are respectively hinged with the same end of the moving plate 12 and the flexible detection plate 4; the threaded rod 1 includes a fixedly connected screw and a ball screw, and the ball screw end of the threaded rod 1 passes through the rotating drive member, the frame plate 10, the fixed ring 2 and the moving plate 12 in sequence, and is fixedly connected with the spline shaft 14; the end of the spline shaft 14 is connected to the back of the flexible detection plate 4 through the pressure storage spring 16; the screw end and the ball screw end of the threaded rod 1 are respectively threadedly matched with the rotating drive member and the moving plate 12, and the threaded rod 1 is slidingly matched with the frame plate 10 and the fixed ring 2. The end of the screw end of the threaded rod 1 is fixedly connected with an end plate 27 to prevent it from falling off.

[0024] The overall transmission principle of the above structure is as follows: The two ends of the cylindrical forging are placed between the three flexible detection plates 4 of the two positioning units, waiting for clamping and limiting. Drive the rotary drive member to rotate, and under the threaded matching relationship between the threaded rod 1, and based on the spline limit of the spline shaft 14 at the end of the threaded rod 1, and the rotation limit between the flexible detection plate 4 and the cylindrical forging, drive the threaded rod 1 to move up and down. At this time, the three flexible detection plates 4 perform three-point positioning and clamping on the end of the cylindrical forging, and the two positioning units simultaneously apply pressure to the two ends of the cylindrical forging. The feed amount of the three positioning and clamping points at both ends is the same, ensuring that each positioning and clamping point is parallel to the main axis of the cylindrical forging or the detection device. During the continuous feeding, the force on the three flexible detection plates 4 changes from point contact to line contact, or even curved surface contact clamping, and gradually straightens the cylindrical forging.

[0025] The coaxial clamping of the two ends of the cylindrical forging is a prerequisite for the bending detection of the cylindrical forging. After the cylindrical forging is clamped on the curved surface, the threaded rod 1 continues to feed. At this time, since the flexible detection plate 4 no longer moves, the pressure storage spring 16 begins to compress, and the spline shaft 14 gradually breaks away from the restriction of the limit plate 15. When the spline shaft 14 is disengaged, the threaded rod 1 is no longer restricted by the flexible detection plate 4 and can rotate freely. Since the threaded rod 1 includes a fixedly connected screw and a ball screw, the friction force of the thread engagement is not the same. Driven by the rotating threaded rod 1, the movable plate 12 first overcomes the friction force and moves upward, and wraps the flexible detection plate 4 to the cylindrical forging through two hinged adjustment links 3. The pressure value is detected by the array strain gauge 17 to determine whether there is deformation at the end of the cylindrical forging.

[0026] The rotating drive member adopts a gear screw transmission structure, such as Figure 5 As shown, specifically, the rotary drive member includes a driven gear 28 and a motor drive assembly drive; both ends of the bottom of the frame plate 10 are fixedly connected to the outer ring surface of the fixed ring 2 through the first frame rod 11; the driven gear 28 is rotatably set on the frame plate 10; the motor drive assembly includes a first motor 23 and a driving gear 25. The first motor 23 is fixedly set at the bottom of the frame plate 10, and its output shaft passes through the frame plate 10; the bottom of the driving gear 25 is fixedly connected to the output shaft of the first motor 23; the driving gear 25 is meshed with the driven gear 28.

[0027] In order to increase the synchronization of the clamping of the two ends and to improve the clamping of the two ends on the axis parallel to the main shaft, the synchronous assembly includes a synchronous belt 24 and two synchronous pulleys 26. The two synchronous pulleys 26 are respectively fixedly connected to the tops of the two driving gears 25 of a pair of rotating driving members corresponding to each other in the two positioning units; the synchronous belt 24 is respectively connected with the two synchronous pulleys 26 to realize transmission.

[0028] In order to stabilize the position when clamping and to facilitate the pre-installation of the cylindrical forging without holding, two sets of symmetrically arranged auxiliary limiters are also included, such as Figure 3 As shown, the auxiliary limiter includes three positioning arc pieces 19 and three connecting rods 20. The adjacent ends of two positioning arc pieces 19 are connected by adjusting springs 18 respectively; the two ends of each connecting rod 20 are spherically matched with one side of a flexible detection plate 4 and one side of a positioning arc piece 19 through a joint ball 21 respectively. Multiple positioning arc pieces 19 form an annular structure. When in use, the columnar forging is passed through the two annular structures respectively for pre-installation.

[0029] Furthermore, it also includes a moving assembly and a detection unit for detecting the integrity of the cylindrical forging rod. Figure 4 The moving assembly is arranged between two fixed rings 2; the detection unit is mounted on the moving assembly and driven to move by the moving assembly to detect the distance between the surface of the cylindrical forging and the detection unit.

[0030] Specifically, Figure 4As shown, the detection unit includes a gear ring 7, a plurality of circumferential moving parts and a plurality of laser rangefinders 5. A plurality of light rods 8 pass through the gear ring 7 and slide with the gear ring 7; each circumferential moving part includes a second motor 29, a moving platform 6 and a moving gear 30; a notch is provided on one side of the moving platform 6, and the bottom of the notch abuts against the outer ring surface of the gear ring 7; the moving gear 30 is arranged in the notch and is rotatably connected to the top and bottom of the moving platform 6 through a rotating shaft; the moving gear 30 meshes with the gear ring 7; the second motor 29 is fixedly arranged on one end face of the moving platform 6, and its output shaft is transmission-connected with the rotating shaft; a plurality of laser rangefinders 5 are respectively mounted on the other end face of the moving platform 6, and the test head faces the center of the gear ring 7. The moving assembly includes a third motor and a lead screw 9. The third motor is fixedly arranged on one end face of a fixed ring 2; the lead screw 9 passes through the gear ring 7 and is threadedly matched with the gear ring 7; the two ends of the lead screw 9 are respectively rotationally connected to one end face of another fixed ring 2, and are transmission-connected to the output shaft of the third motor. In this embodiment, a gear ring transmission structure is used to realize the circumferential movement of the laser rangefinder 5, and a lead screw transmission structure is used to drive the movement in the axial direction.

[0031] In order to facilitate the resetting of the spline shaft 14 and realize the subsequent batch inspection of cylindrical forgings, a resetting nut 13 is fixedly provided on the upper end of each spline shaft 14; the end of the resetting nut 13 is fixedly connected to the ball screw end of the threaded rod 1.

[0032] The device has two symmetrically arranged positioning units to perform end fixing operations, and adopts a transmission structure of a threaded rod nut to drive a flexible detection plate 4 to perform three-point positioning and clamping on the end of the cylindrical forging. The feed amounts of the three positioning and clamping points at both ends are the same, ensuring that each positioning and clamping point is parallel to the main axis of the cylindrical forging or the detection device. During continuous feeding, the force on the three flexible detection plates 4 changes from point contact to line contact, or even curved surface contact clamping, gradually straightening the cylindrical forging, so that the two ends of the cylindrical forging are maintained on the same axis, ensuring the subsequent bending deformation points, that is, the accurate acquisition of multiple maximum deformation points. The device continues to drive and move after clamping. After the threaded rod 1 is disengaged from the spline fit, it can rotate freely, and then the transmission mode of the slider screw is adopted to drive the movable plate 12 to move upward, and the connecting rod structure is adopted to gather the flexible detection plate 4 to the surface of the cylindrical forging to form a multi-plate surface wrapping. According to the same wrapping action and amplitude at both ends of the flexible detection plate 4, the force measurement of the corresponding array strain gauge 17 on the flexible detection plate 4 is used to judge whether the end has bending deformation, thereby realizing the judgment of the bending deformation at the position of the clamped end, and providing a data basis for subsequent correction.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forging bending deformation inspection device, characterized in that: It comprises two positioning units connected by a connecting piece; the positioning unit comprises a fixing ring (2) and three end stop assemblies; The end stop assembly comprises: A flexible detection plate (4) having an array strain gauge (17) disposed inside thereof; A frame plate (10) fixedly arranged on the outer ring surface of the fixing ring (2); A rotating drive member is rotatably arranged on the frame plate (10); a pair of rotating drive members corresponding to each other in the two positioning units are synchronized via a synchronization component; A limit plate (15) and a spline shaft (14); the limit plate (15) is fixedly mounted on the back of the flexible detection plate (4), and the spline shaft (14) and the limit plate (15) are spline-slidably matched; A movable plate (12) and two adjusting connecting rods (3); two ends of each adjusting connecting rod (3) are respectively hinged to the same end of the movable plate (12) and the flexible detection plate (4); A threaded rod (1) comprises a screw rod and a ball screw rod which are fixedly connected, wherein the ball screw rod end of the threaded rod (1) passes through the rotary drive member, the frame plate (10), the fixed ring (2) and the movable plate (12) in sequence and is fixedly connected to the spline shaft (14); the end of the spline shaft (14) is connected to the back of the flexible detection plate (4) via a pressure storage spring (16); the screw rod end and the ball screw rod end of the threaded rod (1) are respectively threadedly matched with the rotary drive member and the movable plate (12), and the threaded rod (1) is slidably matched with the frame plate (10) and the fixed ring (2).

2. The forging bending deformation inspection device according to claim 1, characterized in that: It also includes a moving component and a detection unit; the moving component is arranged between the two fixing rings (2); the detection unit is mounted on the moving component and driven to move by the moving component to detect the distance between the surface of the cylindrical forging and the detection unit.

3. The forging bending deformation inspection device according to claim 1, characterized in that: The rotary drive member comprises a driven gear (28) and a motor drive assembly; both ends of the bottom of the frame plate (10) are fixedly connected to the outer ring surface of the fixed ring (2) through a first frame rod (11); the driven gear (28) is rotatably arranged on the frame plate (10); the motor drive assembly comprises: A first motor (23) is fixedly arranged at the bottom of the frame plate (10), and an output shaft thereof passes through the frame plate (10); A driving gear (25) has a bottom portion fixedly connected to the output shaft of the first motor (23); the driving gear (25) is meshed with the driven gear (28).

4. The forging bending deformation inspection device according to claim 3, characterized in that: The synchronization component includes: Two synchronous pulleys (26) are respectively fixedly connected to the tops of two driving gears (25) of a pair of rotating driving members corresponding to each other in the two positioning units; The synchronous belt (24) is respectively connected to the two synchronous belt wheels (26) to realize transmission.

5. The forging bending deformation inspection device according to claim 1, characterized in that: It also includes two groups of symmetrically arranged auxiliary limiters; the auxiliary limiters include: Three positioning arc-shaped pieces (19); adjacent ends of two of the positioning arc-shaped pieces (19) are connected via adjustment springs (18); Three connecting rods (20); two ends of each connecting rod (20) are spherically matched with a side surface of a flexible detection plate (4) and a side surface of a positioning arc-shaped sheet (19) through a joint ball (21).

6. The forging bending deformation inspection device according to claim 2, characterized in that: The connecting member comprises a plurality of polished rods (8); both ends of the plurality of polished rods (8) are respectively fixedly connected to opposite end surfaces of two fixing rings (2); and the detection unit comprises: a gear ring (7); a plurality of polished rods (8) passing through the gear ring (7) and slidingly engaging with the gear ring (7); A plurality of circumferential moving parts; each of the circumferential moving parts comprises a second motor (29), a moving platform (6) and a moving gear (30); a notch is provided on one side of the moving platform (6), the bottom of the notch abuts against the outer ring surface of the gear ring (7); the moving gear (30) is arranged in the notch and is rotatably connected to the top and bottom of the moving platform (6) via a rotating shaft; the moving gear (30) is meshed with the gear ring (7); the second motor (29) is fixedly arranged on one end surface of the moving platform (6), and its output shaft is drivingly connected to the rotating shaft; A plurality of laser rangefinders (5) are respectively mounted on the other end surface of the movable platform (6), with the test heads facing the center of the gear ring (7).

7. The forging bending deformation inspection device according to claim 6, characterized in that: The mobile assembly comprises: A third motor, fixedly arranged on an end surface of one of the fixing rings (2); A lead screw (9) passes through the gear ring (7) and is threadedly engaged with the gear ring (7); two ends of the lead screw (9) are respectively rotatably connected to one end surface of another of the fixing rings (2) and are drivingly connected to the output shaft of the third motor.

8. The forging bending deformation inspection device according to claim 1, characterized in that: A reset nut (13) is fixedly provided on the upper end of each spline shaft (14); the end of the reset nut (13) is fixedly connected to the ball screw end of the threaded rod (1).

9. The forging bending deformation inspection device according to claim 1, characterized in that: The limiting plate (15) is fixedly connected to the back of the flexible detection plate (4) via a plurality of second rack rods (22).

10. The forging bending deformation inspection device according to claim 1, characterized in that: An end plate (27) is fixedly connected to the end of the screw rod end of the threaded rod (1).

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