Workpiece strength detection apparatus

Abstract

The application belongs to the field of workpiece detection, and particularly relates to a workpiece strength detection device, which comprises a workbench, a rack and a hydraulic cylinder, the rack is arranged on the top of the workbench, a support is arranged on the top of the rack, the hydraulic cylinder is hinged on the side of the support, a fixing seat is hinged on the output end of the hydraulic cylinder, an axle rod is arranged in the middle of the fixing seat, and an inserting rod is fixedly connected to the end of the axle rod, the inserting rod can be inserted into the tubular workpiece to be detected, in use, the tubular workpiece is installed and fixed by the fixing clamp, and then the inserting rod is inserted into the tubular workpiece, the outer surface of the inserting rod is attached to the inner wall of the tubular workpiece, which plays a supporting role and increases the contact area, so that the concave deformation and cracking of the tubular workpiece caused by the external extrusion load can be reduced, and the thin-walled tubular workpiece can be conveniently detected, and the detection range is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of workpiece detection, and particularly relates to a workpiece strength detection device. BACKGROUND

[0002] The tubular tool is a kind of workpiece, which is welded by two metal pipes, and the strength of welding directly affects the strength of the whole workpiece.

[0003] In the prior art, in order to verify the welding quality and strength of the tubular workpiece, the worker uses a workpiece strength detection device to detect the workpiece, which mainly comprises a workbench, a rack, a hydraulic cylinder, a clamp and a ejector rod, the workbench is used to fix the rack and the clamp, the clamp is used to fix the tubular workpiece to be detected, the hydraulic cylinder is installed on the rack, and the ejector rod is located at the end of the hydraulic cylinder, wherein the hydraulic cylinder is used to push the ejector rod to apply pressure load to the welding area of the tubular workpiece, and the worker can judge whether the welding part of the workpiece can bear the load required by the process without deformation and cracking.

[0004] However, when the wall thickness of the detected tubular workpiece is thin, the side wall of the tubular workpiece has poor pressure bearing capacity, and the contact area between the ejector rod pushed by the hydraulic cylinder and the tubular workpiece is small, which can cause the extruded side wall of the tubular workpiece to first bear insufficient pressure, so that the contact area between the side wall of the tubular workpiece and the ejector rod is deformed and cracked, thereby affecting the detection of the welding strength of the tubular workpiece. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art, the present application provides a workpiece strength detection device.

[0006] The technical scheme adopted by the present application to solve the technical problems is that the workpiece strength detection device comprises a workbench, a rack and a hydraulic cylinder, the rack is arranged on the top of the workbench, a support is installed on the top of the rack, the hydraulic cylinder is hinged to the side of the support, a fixing seat is hinged to the output end of the hydraulic cylinder, an axle is arranged in the middle of the fixing seat, and a plug rod is fixedly connected to the end of the axle; the plug rod can be inserted into the tubular workpiece to be detected; a fixing clamp for fixing the tubular workpiece is installed at the corresponding position of the top of the workbench and the plug rod, in use, the outer surface of the plug rod is attached to the inner wall of the tubular workpiece, which plays a supporting role and increases the contact area, so as to reduce the situation that the outer part of the tubular workpiece is deformed and cracked due to external extrusion and load application, thereby facilitating the detection of the thin-walled tubular workpiece.

[0007] Preferably, the support and the fixed seat are both annular structures, the support is rotatably connected with the rack, the fixed seat is rotatably connected with the shaft, the rack is fixedly connected with a motor, the output end of the motor is fixedly connected with a gear, the support is fixedly connected with a gear ring, the gear and the gear ring are meshed with each other; the motor can drive the hydraulic cylinder to rotate 360 degrees through the gear and the gear ring, and the thrust angle of the hydraulic cylinder can be adjusted, so that the welding strength of each part of the welding area can be detected, and the detection range is improved.

[0008] Preferably, the top side of the workbench is fixedly connected with a ball seat, the ball rod is rotatably connected with the ball seat, the axis of the ball rod coincides with the axis of the shaft, the ball rod is fixedly connected with a guide seat, the guide seat is slidably connected with guide rods on both sides, the guide rods can slide transversely on the guide seat, and the guide rods are fixedly connected with the guide rods away from the guide seat; the top of the workbench is fixedly connected with an oil cylinder, the output end of the oil cylinder is fixedly connected with the rack, and the rack is slidably connected to the top of the workbench through a sliding rail; the oil cylinder can drive the rack to move on the workbench, so that the inserting rod can be automatically inserted into the tubular workpiece to be detected; the shaft and the ball rod are integrated, the shaft can exert load more stably, and the detection accuracy is improved.

[0009] Preferably, the inserting rod and the shaft are rotatably connected with a transmission shaft, the end of the transmission shaft is fixedly connected with a lead screw, the inserting rod is provided with a cavity, a plurality of through grooves are formed in the side surface of the cavity, and the lead screw is connected with a moving seat through a screw nut pair; rotating the lead screw can make the moving seat slide in the cavity; the moving seat is slidably connected with the through grooves, a plurality of connecting rods are hinged to the moving seat, a plurality of jacks are hinged to the end of the inserting rod away from the shaft, and the connecting rods and the jacks are hinged at the middle portions; the movement of the moving seat can make the jacks rotate counterclockwise through the connecting rods; the above arrangement can improve the application range and facilitate the fixation of various tubular workpieces.

[0010] Preferably, the jacks are hinged with a backing plate, torsional springs are installed at the hinged portions of the backing plate and the jacks; a sliding groove is formed in the backing plate, a spring seat is slidably connected in the sliding groove, a first spring is fixedly connected between the spring seat and the sliding groove, and a plurality of balls are rotatably connected in the spring seat; the above arrangement can facilitate the adjustment and pulling of the tubular workpiece.

[0011] Preferably, the fixing clamp comprises a vertical seat, a first clamping seat and two second clamping seats, the vertical seat is fixedly connected to the top side of the workbench, and a plurality of sliding grooves are formed in the vertical seat; the first clamping seat is slidably connected with the sliding grooves, and the two second clamping seats are located on the side of the first clamping seat and fixed with the vertical seat through bolts; the above arrangement can facilitate the adjustment of the position of the tubular workpiece.

[0012] Preferably, one end of the inserting rod away from the shaft is provided with a cleaning seat, an accommodation cavity is formed in the cleaning seat, a winding wheel is rotatably connected in the accommodation cavity, a rotating shaft is fixedly connected between the winding wheel and the lead screw, an elastic strip is fixedly connected on the surface of the winding wheel, a guide groove is formed in the side surface of the accommodation cavity, the elastic strip is slidably connected with the guide groove, and the end portion of the elastic strip extends out of the guide groove; one end of the elastic strip away from the winding wheel is fixedly connected with an elastic cotton ring; in normal state, the elastic strip is wound on the winding wheel, during detection, the winding wheel rotates to unwind the wound elastic strip, and the elastic strip extends out under the guidance of the guide groove, so that the end portion of the elastic strip and the elastic cotton ring abut against and adhere to the inner wall of the tubular workpiece to be detected, thereby the inner wall of the tubular workpiece can be cleaned, and the situation that the tubular workpiece is bulged or cracked due to the residual metal debris is reduced.

[0013] Preferably, a guide pipe is fixedly connected at the position corresponding to the surface of the cleaning seat and the guide groove, one end of the guide pipe away from the cleaning seat is bent to the side away from the shaft, and an elastic metal woven mesh is fixedly connected between the elastic cotton ring and the cleaning seat, so that when the workpiece with large brittleness is deformed and broken, the metal woven mesh can play an intercepting role, thereby reducing the impact and jamming of the metal fragments into the connecting rod and the ejector rod, and playing a protection role.

[0014] Preferably, the cleaning seat is sleeved on the end portion of the inserting rod and slidably connected with the inserting rod, a second spring is fixedly connected between the cleaning seat and the inserting rod, and a rod body is fixedly connected at one end of the cleaning seat away from the inserting rod; the rotating shaft comprises an inner shaft and an outer shaft which is telescopically and slidably sleeved on the outer portion of the inner shaft, the end portion of the outer shaft is fixedly connected with the lead screw, and the end portion of the inner shaft is fixedly connected with the winding wheel, so that the position of the cleaning seat can be limited, thereby reducing the situation that the cleaning seat excessively approaches the welding area of the tubular workpiece, and reducing the situation that the elastic strip is squeezed and jammed when the welding area is deformed.

[0015] Preferably, two pulleys are rotatably connected at the end of the guide groove close to the winding wheel, and the elastic strip passes through the two pulleys, so that the elastic strip can be guided.

[0016] The present application has the advantages that:

[0017] 1. The present application is provided with a rack, a support, a fixing seat, a shaft, a hydraulic cylinder and an inserting rod, in use, the tubular workpiece is installed and fixed by the fixing clamp, then the inserting rod is inserted into the inner portion of the tubular workpiece, the outer surface of the inserting rod is adhered to the inner wall of the tubular workpiece, which plays a supporting role and increases the contact area, so that the situation that the outer portion of the tubular workpiece is deformed and cracked due to the external extrusion and load is reduced, thereby the thin-walled tubular workpiece can be conveniently detected, and the detection range is improved.

[0018] 2. The utility model discloses a cleaning seat, elastic strip, elastic cotton ring, pivot and winding wheel are set up, when detecting, the rotation of the lead screw will drive the winding wheel rotation through the pivot, and the winding of the elastic strip is unwound to the rotation of the winding wheel, and the elastic strip is stretched under the guidance of the guide groove, and the end of the elastic strip and the elastic cotton ring are pressed and adhere to the inner wall of the tubular workpiece to be detected, after positioning, the insertion rod continues to move and inserts, and then the elastic cotton ring is pushed to wipe the metal scraps on the inner wall of the tubular workpiece, and the situation that the lateral wall of the tubular workpiece is convex and cracked easily caused by the extrusion of the gasket on the metal scraps is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is the structural schematic diagram of the present application;

[0021] Figure 2 It is the structural schematic diagram of the present application;

[0022] Figure 3 It is the structural schematic diagram of the present application;

[0023] Figure 4 It is the structural schematic diagram of the present application;

[0024] Figure 5 It is the structural schematic diagram of the present application;

[0025] Figure 6 It is the structural schematic diagram of the present application;

[0026] Figure 7 It is the structural schematic diagram of the present application.

[0027] In the figure: 11, workbench; 12, frame; 13, support; 14, hydraulic cylinder; 15, fixed seat; 16, shaft; 17, plug rod; 21, motor; 22, gear ring; 23, gear; 31, ball seat; 32, ball rod; 33, guide seat; 34, guide rod; 35, oil cylinder; 41, transmission shaft; 42, screw rod; 43, moving seat; 44, connecting rod; 45, ejector rod; 51, vertical seat; 52, first clamping seat; 53, second clamping seat; 54, sliding groove; 61, backing plate; 62, ball; 63, sliding groove; 64, spring seat; 71, cleaning seat; 72, winding wheel; 73, elastic strip; 74, elastic cotton ring; 75, guide groove; 81, guide pipe; 82, elastic metal woven mesh; 91, inner shaft; 92, outer shaft; 93, rod body; 10, pulley. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] The specific embodiments are given below.

[0030] Please refer to Figures 1-2 As shown in the figure, a workpiece strength detection device includes a workbench 11, a frame 12 and a hydraulic cylinder 14, the frame 12 is arranged on the top of the workbench 11; the top of the frame 12 is provided with a support 13, the hydraulic cylinder 14 is hinged on the side of the support 13, the output end of the hydraulic cylinder 14 is hinged with a fixed seat 15, the middle part of the fixed seat 15 is provided with a shaft 16, the end of the shaft 16 is fixedly connected with a plug rod 17; the plug rod 17 can be inserted into the inside of a tubular workpiece to be detected; the top of the workbench 11 is provided with a fixed clamp for fixing the tubular workpiece at the position corresponding to the plug rod 17;

[0031] In use, the tubular workpiece is fixed by the fixing clamp, and then the insertion rod 17 is inserted into the inside of the tubular workpiece, the outer surface of the insertion rod 17 is attached to the inner wall of the tubular workpiece, which plays a supporting role and increases the contact area, then the fixed seat 15 is pulled by the hydraulic cylinder 14, and the end of the shaft rod 16 is lifted, so as to apply load to the tubular workpiece, so as to detect the strength of the welded part of the tubular workpiece, so as to reduce the situation that the external part of the tubular workpiece is deformed and cracked by external extrusion load, and then the thin-walled tubular workpiece can be conveniently detected, and the detection range is improved, wherein the structure of the shaft rod 16 and the insertion rod 17 can play the role of amplifying force by the lever action, which can facilitate the workpiece strength detection under large load, and the hydraulic cylinder 14 is provided with a pressure sensor to output the thrust of the hydraulic cylinder 14.

[0032] Further, as shown in Figures 1-2 The support 13 and the fixed seat 15 are both annular structures, the support 13 is rotatably connected with the rack 12, the fixed seat 15 and the shaft rod 16 are rotatably connected, the rack 12 is fixedly connected with the motor 21, the output end of the motor 21 is fixedly connected with the gear 23, the support 13 is fixedly connected with the tooth ring 22, and the gear 23 and the tooth ring 22 are meshed with each other; the motor 21 can make the hydraulic cylinder 14 rotate by 360 degrees through the transmission of the gear 23 and the tooth ring 22, and adjust the thrust angle of the hydraulic cylinder 14; in use, the motor 21 is a servo motor 21, which can drive the gear 23 to rotate, and then drive the tooth ring 22 and the support 13 to rotate on the rack 12, so as to adjust the angle of the hydraulic cylinder 14, so as to adjust the angle of the hydraulic cylinder 14, so as to satisfy the load from different angles, so as to detect the welding strength of each part of the welding area, and improve the detection range.

[0033] Further, as shown in Figures 1-2As shown, the top side of the workbench 11 is fixed with a ball seat 31, the ball seat 31 is buckled with a ball rod 32 connected in rolling, the axis of the ball rod 32 coincides with the axis of the shaft rod 16, the ball rod 32 is fixed with a guide seat 33, the two sides of the guide seat 33 are slidingly connected with guide rods 34, the guide rods 34 can slide on the guide seat 33, the end of the guide rod 34 away from the guide seat 33 is fixed with the guide rod 34; The top of the workbench 11 is fixed with an oil cylinder 35, the output end of the oil cylinder 35 is fixed with the rack 12, the rack 12 is slidingly connected on the top of the workbench 11, the oil cylinder 35 can push the rack 12 to move on the workbench 11, so that the plug rod 17 automatically inserts into the tubular workpiece to be detected; In use, the end of the ball rod 32 can rotate in the ball seat 31 at multiple angles to meet the detection angle requirement, wherein the ball rod 32 is connected through the guide seat 33 and the guide rod 34, so that the shaft rod 16 and the ball rod 32 are integrated, which can make the shaft rod 16 apply load more stably, facilitate to improve the detection accuracy, the guide rod 34 can slide on the guide seat 33, so that the plug rod 17 is inserted into the tubular workpiece, the oil cylinder 35 is used to facilitate the movement of the rack 12, so that the plug rod 17 can be inserted into the tubular workpiece.

[0034] Further, as shown in Figures 4-5 The end of the ball rod 32 can rotate in the ball seat 31 at multiple angles to meet the detection angle requirement, wherein the ball rod 32 is connected through the guide seat 33 and the guide rod 34, so that the shaft rod 16 and the ball rod 32 are integrated, which can make the shaft rod 16 apply load more stably, facilitate to improve the detection accuracy, the guide rod 34 can slide on the guide seat 33, so that the plug rod 17 is inserted into the tubular workpiece, the oil cylinder 35 is used to facilitate the movement of the rack 12, so that the plug rod 17 can be inserted into the tubular workpiece.

[0035] In this embodiment, the staff can rotate the transmission shaft 41 to drive the screw rod 42 to rotate, and then drive the moving seat 43 to move. The moving seat 43 is slidingly connected with the through slot, and the moving seat 43 is hinged with a plurality of connecting rods 44. The end of the plug rod 17 away from the shaft rod 16 is hinged with a plurality of jacks 45, and the middle part of the connecting rod 44 and the jack 45 is hinged. The movement of the moving seat 43 can make the plurality of jacks 45 rotate counterclockwise through the plurality of connecting rods 44.

[0036] Further, as shown in Figures 4-5 The top rod 45 is hingedly connected with a backing plate 61, and a torsion spring is installed at the hinge connection between the top rod 45 and the backing plate 61. A sliding groove 63 is formed in the backing plate 61, and a spring seat 64 is slidably connected in the sliding groove 63. A first spring is fixed between the spring seat 64 and the sliding groove 63. A ball 62 is rotatably connected on the spring seat 64. In use, the backing plate 61 is used to improve the contact between the end of the top rod 45 and the inner wall of the tubular workpiece, which increases the contact area and reduces the pressure between the top rod 45 and the tubular workpiece. During installation, the insertion rod 17 needs to be located at the center of gravity of the tubular workpiece, but it is difficult to move the tubular workpiece to cooperate with the fixed clamp for fixation by relying on the support and positioning of the top rod 45. Therefore, the ball 62 is installed outside the backing plate 61, which can facilitate the movement of the tubular workpiece. When detecting, the backing plate 61 is in contact with the inner wall of the tubular workpiece, and the ball 62 is pressed into the sliding groove 63, reducing the damage and cracking of the tubular workpiece caused by the protrusion of the ball 62 on the backing plate 61.

[0037] Further, as shown in Figure 3 The fixed clamp includes a stand 51, a first clamping seat 52, and two second clamping seats 53. The stand 51 is fixed to the top side of the workbench 11, and a plurality of sliding grooves 54 are formed in the stand 51. The first clamping seat 52 is slidably connected with the sliding grooves 54, and the two second clamping seats 53 are located on the side of the first clamping seat 52 and are fixed to the stand 51 by bolts.

[0038] During installation, the tubular workpiece is placed inside the first clamping seat 52 and the second clamping seat 53. At this time, the bolts are not tightened, and the tubular workpiece can move up and down within the first clamping seat 52 and the second clamping seat 53. At the same time, the first clamping seat 52 can slide along the sliding grooves 54. The end of the insertion rod 17 is inserted into the tubular workpiece. Then the backing plate 61 is extended, and the ball 62 on the backing plate 61 supports and positions the tubular workpiece. The bolts are tightened to fix the first clamping seat 52, the second clamping seat 53, and the stand 51. Then the insertion rod 17 continues to move to be fully inserted. The above arrangement can facilitate the adjustment of the position of the tubular workpiece to use the positioning between the tubular workpiece and the shaft rod 16.

[0039] Further, as shown in Figure 4 , 6As shown in Figure 7, the end of the insertion rod 17 away from the shaft 16 is provided with a cleaning seat 71. The cleaning seat 71 has a storage cavity inside, and a winding wheel 72 is rotatably connected inside the storage cavity. A rotating shaft is fixed between the winding wheel 72 and the lead screw 42. An elastic strip 73 is fixedly attached to the surface of the winding wheel 72. A guide groove 75 is provided on the side of the storage cavity. The elastic strip 73 is slidably connected to the guide groove 75, and its end extends out of the guide groove 75. An elastic cotton ring 74 is fixedly attached to the end of the elastic strip 73 away from the winding wheel 72. Under normal conditions, the elastic strip 73 is wound around the winding wheel 72. During testing, the winding wheel 72 rotates to unwind the wound elastic strip 73, and the elastic strip 73 extends out under the guidance of the guide groove 75, so that the end of the elastic strip 73 and the elastic cotton ring 74 abut against and fit against the inner wall of the tubular workpiece to be tested.

[0040] During welding, the tubular workpiece is made by welding two metal tubes. The ends of the metal tubes need to be milled into bevels. During processing, metal shavings will adhere to the inner wall. The pressure of the metal shavings on the pad 61 can easily cause the side wall of the tubular workpiece to bulge and crack, and damage the pad 61.

[0041] Under normal conditions, the elastic strip 73 is wound around the winding wheel 72. During testing, the rotation of the lead screw 42 drives the winding wheel 72 to rotate via the shaft. The rotation of the winding wheel 72 unwinds the wound elastic strip 73, and the elastic strip 73 extends out under the guidance of the guide groove 75, so that the end of the elastic strip 73 and the elastic cotton ring 74 abut against and fit against the inner wall of the tubular workpiece to be tested. After positioning, the insertion rod 17 continues to move and insert, and then the pushed elastic cotton ring 74 wipes away the metal debris on the inner wall of the tubular workpiece, thereby reducing the situation where the pad 61 squeezes the metal debris, which can easily cause the side wall of the tubular workpiece to bulge and crack.

[0042] Furthermore, such as Figures 6-7 As shown, a guide tube 81 is fixedly connected to the surface of the cleaning seat 71 and the corresponding position of the guide groove 75. The end of the guide tube 81 away from the cleaning seat 71 is bent away from the shaft 16. An elastic metal woven mesh 82 is fixedly connected between the elastic cotton ring 74 and the cleaning seat 71. In use, the workpiece with high brittleness may break due to deformation, resulting in metal fragments flying. The metal woven mesh can intercept the fragments, thereby reducing the impact of metal fragments and their getting stuck in the connecting rod 44 and the top rod 45, thus providing protection. Furthermore, the bending of the end of the guide tube 81 can guide the elastic strip 73 to bend away from the shaft 16. When the elastic strip 73 is impacted, it is less likely to bend and flip towards the shaft 16, causing metal fragments to pass through.

[0043] Furthermore, such as Figure 4 , 6As shown in Figure 7, the cleaning seat 71 is sleeved on the end of the insertion rod 17 and slidably connected to it. A second spring is fixed between the cleaning seat 71 and the insertion rod 17. A rod body 93 is fixedly connected to the end of the cleaning seat 71 away from the insertion rod 17. The rotating shaft consists of an inner shaft 91 and a retractable and slidable outer shaft 92 sleeved outside the inner shaft 91. The end of the outer shaft 92 is fixedly connected to a lead screw 42, and the end of the inner shaft 91 is fixedly connected to a reel 72. During use, the continuous insertion of the insertion rod 17 causes the rod body 93 to abut against the inner wall of the tubular workpiece, which is used to limit the position of the cleaning seat 71, thereby reducing the cleaning seat 71 from getting too close to the welding area of ​​the tubular workpiece. This reduces the situation where the elastic strip 73 is squeezed and stuck when the welding area is deformed, which would prevent it from being reset. This makes it convenient for workers to use.

[0044] Furthermore, such as Figure 7 As shown, the guide groove 75 is rotatably connected to two pulleys 10 at one end near the winding wheel 72, and the elastic strip 73 passes between the two pulleys 10. In use, the pulleys 10 serve to guide the elastic strip 73 and reduce wear between the elastic strip 73 and the end of the guide groove 75. When the elastic strip 73 is fully wound onto the winding wheel 72, it can squeeze, limit and fix the elastic strip 73 from the outside.

[0045] The working principle is that in use, the tubular workpiece is installed and fixed by the fixing clamp, then the inserting rod 17 is inserted into the tubular workpiece, the outer surface of the inserting rod 17 is attached to the inner wall of the tubular workpiece, which plays a supporting role and increases the contact area, then the fixed seat 15 is pulled by the hydraulic cylinder 14, and the end of the shaft rod 16 is lifted, so as to apply load to the tubular workpiece, so as to detect the strength of the welded part of the tubular workpiece, so as to reduce the situation that the external part of the tubular workpiece is deformed and cracked by external extrusion load, and to facilitate the detection of the thin-walled tubular workpiece and improve the detection range. The structure of the shaft rod 16 and the inserting rod 17 can play the role of amplifying force by the lever action, which can facilitate the detection of the strength of the workpiece under large load. The hydraulic cylinder 14 is provided with a pressure sensor, which can output the thrust of the hydraulic cylinder 14. The motor 21 is a servo motor 21, which can drive the gear 23 to rotate, and then drive the gear ring 22 and the support 13 to rotate on the rack 12, so as to adjust the angle of the hydraulic cylinder 14, so as to satisfy the load applied from different angles, so as to detect the welding strength of each part of the welding area and improve the detection range. The end of the ball rod 32 can be rotated at multiple angles in the ball seat 31, so as to meet the detection angle requirement. The ball rod 32 is connected by the guide seat 33 and the guide rod 34, so that the shaft rod 16 and the ball rod 32 are integrated, which can make the shaft rod 16 apply load more stably and improve the detection accuracy. The guide rod 34 can slide on the guide seat 33, so as to insert the inserting rod 17 into the tubular workpiece. The oil cylinder 35 is used to facilitate the movement of the rack 12, and then the inserting rod 17 can be inserted into the tubular workpiece;

[0046] In use, the staff can rotate the transmission shaft 41 to drive the screw rod 42 to rotate, and then drive the moving seat 43 to move. The moving seat 43 is in sliding fit with the through slot, improving the stability of movement. In the process of moving the moving seat 43, the top rod 45 is pushed to rotate by the connecting rod 44, so that the top rod 45 is attached to the inner wall of the tubular workpiece, so as to support the inner wall of the tubular workpiece. When the inner diameter of the tubular workpiece is greater than the inserting rod 17, the top rod 45 supports and applies thrust to the inner wall of the tubular workpiece, so as to improve the application range and facilitate the application of different tubular workpieces. The number of top rods 45 can be increased while ensuring the strength of the inserting rod 17. The more the number, the stronger the support effect on the inner wall of the tubular workpiece. The base plate 61 is used to increase the contact between the end of the top rod 45 and the inner wall of the tubular workpiece, which plays a role in increasing the contact area and reducing the pressure between the top rod 45 and the tubular workpiece;

[0047] In the process of installation, the plug rod 17 needs to be located at the center of gravity of the tubular workpiece, but it is difficult to move the tubular workpiece to cooperate with the fixing clamp for positioning by the support rod 45, so the ball 62 is installed outside the base plate 61, which can conveniently pull the tubular workpiece to move, and when detected, the base plate 61 is attached to the inner wall of the tubular workpiece, and the ball 62 is pressed into the chute 63, reducing the damage and cracking of the tubular workpiece caused by the protrusion of the ball 62 on the base plate 61. When installing, the tubular workpiece is placed in the first clamping seat 52 and the second clamping seat 53, at this time the bolt is not tightened, the tubular workpiece can move up and down in the first clamping seat 52 and the second clamping seat 53, and the first clamping seat 52 can slide along the sliding groove 54. The end of the plug rod 17 is inserted into the tubular workpiece, then the base plate 61 is stretched, the ball 62 on the base plate 61 supports and positions the tubular workpiece, the bolt is tightened to fix the first clamping seat 52, the second clamping seat 53 and the stand 51, and then the plug rod 17 continues to move to be fully inserted. The above settings can conveniently adjust the position of the tubular workpiece to adapt to the positioning between the tubular workpiece and the shaft 16;

[0048] When welding, the tubular workpiece is welded by two metal pipes, and the end of the metal pipe needs to be milled to form a groove. During processing, the inner wall will adhere to metal debris, and the base plate 61 is easy to cause the outer convexity and cracking of the side wall of the tubular workpiece, and damage the base plate 61;

[0049] In normal state, the elastic strip 73 is wound on the winding wheel 72, and during detection, the rotation of the lead screw 42 drives the winding wheel 72 to rotate, the winding wheel 72 releases the wound elastic strip 73, and the elastic strip 73 extends out under the guidance of the guide groove 75, so that the end of the elastic strip 73 abuts against and adheres to the inner wall of the tubular workpiece to be detected, after positioning, the insertion rod 17 continues to move and insert, and then the elastic cotton ring 74 is pushed to wipe the metal debris on the inner wall of the tubular workpiece, thereby reducing the situation that the gasket 61 extrudes the metal debris to cause the outer convexity and cracking of the side wall of the tubular workpiece, and the deformation of the workpiece with greater brittleness may cause the workpiece to crumble, resulting in the splashing of metal debris, wherein the metal weaving can play a blocking role, thereby reducing the impact and jamming of metal debris into the connecting rod 44 and the ejector rod 45, and playing a protection role, and the end of the guide pipe 81 can guide the elastic strip 73 to bend away from the shaft rod 16, so that when the elastic strip 73 is impacted, it is not easy to bend and turn towards the shaft rod 16, causing the metal debris to pass through, the continuous insertion of the insertion rod 17 causes the rod body 93 to abut against the inner wall of the tubular workpiece, which is used to limit the position of the cleaning seat 71, thereby reducing the excessive approach of the cleaning seat 71 to the welding area of the tubular workpiece, thereby reducing the situation that the elastic strip 73 is extruded and jammed when the welding area deforms, causing the elastic strip 73 to fail to reset, so that the staff can use it conveniently, the pulley 10 is used to guide the elastic strip 73, and can reduce the wear between the elastic strip 73 and the end of the guide groove 75, and when the elastic strip 73 is completely wound on the winding wheel 72, it can be extruded, limited and fixed from the outside.

[0050] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A workpiece strength detection apparatus comprising a worktable (11), a frame (12) and a hydraulic cylinder (14), the frame (12) is arranged on the top of the worktable (11); characterized in that: The top of the rack (12) is provided with a support (13), the hydraulic cylinder (14) is hinged on the side of the support (13), the output end of the hydraulic cylinder (14) is hinged with a fixed seat (15), the middle part of the fixed seat (15) is provided with a shaft rod (16), the end of the shaft rod (16) is fixedly connected with a plug rod (17); the plug rod (17) can be inserted into the inside of the tubular workpiece to be detected; The top of the workbench (11) is provided with a fixed clamp for fixing the tubular workpiece at the corresponding position of the plug rod (17); The inside of the plug rod (17) and the shaft rod (16) is rotatably connected with a transmission shaft (41), the end of the transmission shaft (41) is fixedly connected with a screw rod (42), the inside of the plug rod (17) is provided with a cavity, a plurality of through grooves are formed in the side of the cavity, the screw rod (42) is connected with a moving seat (43) through a screw nut pair; rotating the screw rod (42) can make the moving seat (43) slide in the cavity; the moving seat (43) is slidably connected with the through grooves, a plurality of connecting rods (44) are hinged on the moving seat (43), a plurality of jacks (45) are hinged on the end of the plug rod (17) away from the shaft rod (16), the middle part of the connecting rod (44) and the jack (45) is hinged; the movement of the moving seat (43) can make the plurality of jacks (45) rotate counterclockwise through the plurality of connecting rods (44); The support (13) and the fixed seat (15) are both provided in an annular structure, the support (13) is rotatably connected with the rack (12), the fixed seat (15) is rotatably connected with the shaft rod (16), the rack (12) is fixedly connected with a motor (21), the output end of the motor (21) is fixedly connected with a gear (23), the support (13) is fixedly connected with a gear ring (22), the gear (23) and the gear ring (22) are meshed with each other; the motor (21) can make the hydraulic cylinder (14) rotate by 360 degrees through the transmission of the gear (23) and the gear ring (22), and adjust the thrust angle of the hydraulic cylinder (14); The top side of the workbench (11) is fixedly connected with a ball seat (31), the ball seat (31) is rotatably connected with a ball rod (32) by clamping, the axis of the ball rod (32) coincides with the axis of the shaft rod (16), the ball rod (32) is fixedly connected with a guide seat (33), the two sides of the guide seat (33) are slidably connected with guide rods (34), the guide rods (34) can slide laterally on the guide seat (33), the end of the guide rod (34) away from the guide seat (33) is fixedly connected with a guide rod (34); The top of the workbench (11) is fixedly connected with an oil cylinder (35), the output end of the oil cylinder (35) is fixedly connected with the rack (12), the rack (12) is slidably connected on the top of the workbench (11) through a sliding rail, the oil cylinder (35) can push the rack (12) to move on the workbench (11), so that the plug rod (17) is automatically inserted into the inside of the tubular workpiece to be detected.

2. The workpiece strength detection apparatus of claim 1, wherein: The top rod (45) is hinged with a backing plate (61), the backing plate (61) is provided with a torsional spring at the hinged position with the top rod (45); The sliding groove (63) is internally connected with a spring seat (64), and a first spring is fixed between the spring seat (64) and the sliding groove (63); the spring seat (64) is connected with the rolling ball (62) in a rolling mode.

3. The workpiece strength detection apparatus of claim 2, wherein: The fixing clamp comprises a vertical seat (51), a first clamping seat (52) and two second clamping seats (53), the vertical seat (51) is fixed on the top side of the workbench (11), and a plurality of sliding grooves (54) are formed in the vertical seat (51); the first clamping seat (52) is connected with the sliding groove (54) in a sliding mode, and the two second clamping seats (53) are located on the side of the first clamping seat (52) and are fixed with the vertical seat (51) through bolts.

4. The workpiece strength detection apparatus of claim 3, wherein: The end of the inserting rod (17) away from the shaft rod (16) is provided with a cleaning seat (71), the cleaning seat (71) is internally provided with a receiving cavity, the receiving cavity is internally connected with a winding wheel (72) in a rotating mode, a rotating shaft is fixed between the winding wheel (72) and the screw rod (42), the surface of the winding wheel (72) is fixed with an elastic strip (73), the side of the receiving cavity is provided with a guide groove (75), the elastic strip (73) is connected with the guide groove (75) in a sliding mode, and the end part of the elastic strip (73) extends out of the guide groove (75); the end of the elastic strip (73) away from the winding wheel (72) is fixed with an elastic cotton ring (74). In a normal state, the elastic strip (73) is wound on the winding wheel (72), in detection, the winding wheel (72) is rotated to unwind the wound elastic strip (73), and the elastic strip (73) is extended out under the guidance of the guide groove (75), so that the end part of the elastic strip (73) and the elastic cotton ring (74) abut against and adhere to the inner wall of the tubular workpiece to be detected.

5. The workpiece strength detection apparatus of claim 4, wherein: The surface of the cleaning seat (71) and the corresponding position of the guide groove (75) are fixed with a guide pipe (81), the end of the guide pipe (81) away from the cleaning seat (71) is bent to the side away from the shaft rod (16), and the elastic cotton ring (74) and the cleaning seat (71) are fixed with an elastic metal woven mesh (82).

6. The workpiece strength detection apparatus of claim 5, wherein: The cleaning seat (71) is sleeved on the end of the inserting rod (17) and connected with the inserting rod (17) in a sliding mode, a second spring is fixed between the cleaning seat (71) and the inserting rod (17), and the end of the cleaning seat (71) away from the inserting rod (17) is fixed with a rod body (93). The rotating shaft comprises an inner shaft (91) and an outer shaft (92) which is sleeved on the outer part of the inner shaft (91) and can slide in an extendible mode, and the end of the outer shaft (92) is fixed with the screw rod (42), and the end of the inner shaft (91) is fixed with the winding wheel (72).

7. The workpiece strength detection apparatus of claim 5, wherein: The end of the guide groove (75) close to the winding wheel (72) is rotatably connected with two pulleys (10), and the elastic strip (73) passes through the two pulleys (10).

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