Friction welding quality detection device

Abstract

The invention discloses a friction welding quality detection device which comprises a mounting platform and further comprises a supporting and positioning mechanism, a pressing and positioning mechanism, a driving mechanism, a length detection mechanism and a jerk value detection mechanism which are arranged on the mounting platform. The supporting and positioning mechanism comprises a supporting assembly and a head end positioning assembly, the supporting assembly is used for supporting the circumferential surface of a to-be-detected workpiece, a clamping space is formed between the pressing and positioning mechanism and the supporting assembly, and the pressing and positioning mechanism is used for pressing the to-be-detected workpiece on the supporting assembly; the head end positioning assembly is used for positioning a to-be-detected workpiece, and the length detection mechanism is used for detecting the position of the tail end face of the to-be-detected workpiece; the driving mechanism is used for driving the to-be-detected workpiece to rotate, and the jerk value detection mechanism is used for detecting the jerk value of the circumferential surface of the to-be-detected workpiece. The efficiency of detecting the jerk value and the compression value of the workpiece to be detected can be improved, operation is easy and convenient, and accuracy is high.

Description

Technical Field

[0001] The invention relates to quality detection equipment, in particular to a friction welding quality detection device. Background Art

[0002] Friction welding is a welding method that uses the heat generated by the friction between the contact surfaces of the workpieces as a heat source to cause the workpieces to undergo plastic deformation under pressure. The connection between two rods can be made by friction welding. Taking valve manufacturing as an example, the valve stem 71 and the valve disc 72 can be welded together by friction welding. After welding, the valve (i.e., the workpiece to be tested 7) has three parts: the valve stem 71, the valve disc 72, and the welding part 73. The existing technology has been able to realize batch processing of valves through an automated system. Once the quality of the automated processing is defective due to some reasons, it is likely to cause subsequent large batches of workpieces to be scrapped. Therefore, after the friction welding of the valves is completed, it is necessary to conduct a random inspection of the welding quality. The main means of detection is to measure the runout and compression of the valves. However, the current detection means are still at the stage of full manual detection and judgment. The operation of full manual detection of the runout and compression of the valves is relatively cumbersome, the detection efficiency is low, and the accuracy is difficult to guarantee. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a friction welding quality detection device, which can improve the efficiency of detecting the runout and compression of a workpiece to be tested, is easy to operate and has high accuracy.

[0004] A friction welding quality detection device in the present invention comprises a mounting platform, and also comprises a supporting positioning mechanism, a clamping positioning mechanism, a driving mechanism, a length detection mechanism and a run-out detection mechanism arranged on the mounting platform; the supporting positioning mechanism comprises a supporting assembly and a head end positioning assembly, the supporting assembly is used to provide support for the circumferential surface of the workpiece to be measured, a clamping space is formed between the clamping positioning mechanism and the supporting assembly, and the clamping positioning mechanism is used to clamp the workpiece to be measured on the supporting assembly; the head end positioning assembly and the length detection mechanism are respectively arranged on two different sides of the workpiece to be measured in the axial direction, the head end positioning assembly is used to provide positioning for the head end face of the workpiece to be measured, and the length detection mechanism is used to detect the position of the tail end face of the workpiece to be measured; the driving mechanism is used to drive the workpiece to be measured to rotate around its own axis, and the run-out detection mechanism is used to detect the run-out of the circumferential surface of the workpiece to be measured.

[0005] Further, the support assembly includes a first support member and a second support member which are arranged at intervals along the axial direction of the workpiece to be measured; the first support member includes a first support base and two rotating support shafts, the middle parts of the two rotating support shafts are rotatably matched with the first support base, the head ends of the two rotating support shafts both extend forward from the first support base and are both provided with a transmission structure, the transmission structure is transmission-connected to the driving mechanism, the tail ends of the two rotating support shafts both extend backward from the first support base and are both provided with support wheels, and the two support wheels are used to contact the circumferential surface of the workpiece to be measured; the second support member includes a second support base and a V-shaped support groove arranged on the second support base.

[0006] Furthermore, the head end positioning assembly includes an axial positioning adjustment seat, an adjustable positioning rod and a first locking piece. The axial positioning adjustment seat is provided with a plurality of guide holes extending through the front-to-back direction. The plurality of guide holes are spaced apart in the up-and-down direction. The adjustable positioning rod is inserted into one of the guide holes, and the front and rear ends of the adjustable positioning rod both extend out of the guide hole. The adjustable positioning rod is used to contact the head end face of the workpiece to be measured, and the first locking piece is used to lock or unlock the position of the adjustable positioning rod.

[0007] Furthermore, a first guide rail is provided on the mounting platform, and the second supporting member also includes a second locking member and a first sliding block provided at the bottom of the second supporting base, the first sliding block slidingly cooperates with the first guide rail, and the second locking member is used to lock or unlock the position of the second supporting member.

[0008] Furthermore, the clamping and positioning mechanism includes a cylinder mounting bracket, a cylinder adjustment base, a decompression cylinder, an adjustable mounting bracket, a third locking piece, an elastic pressing locking block and a pressing pulley, the cylinder adjustment base is arranged on the mounting platform, the decompression cylinder is connected to the cylinder mounting bracket, the cylinder mounting bracket is connected to the cylinder adjustment base in a positionally adjustable manner, the adjustable mounting bracket is provided with a first adjusting groove with a length along the up and down directions, the third locking piece passes through the first adjusting groove and is threadedly connected to the first support base; the middle part of the elastic pressing locking block is rotatably connected to the top of the adjustable mounting bracket, and the end of the elastic pressing locking block close to the workpiece to be measured The pressing end is the pressing end, the end of the elastic pressing and locking block away from the workpiece to be measured is the lever force end, the pressing pulley is rotatably installed on the pressing end, the pressing pulley is located above the two supporting wheels, and the lever force end is suspended and located below the decompression cylinder; when the decompression cylinder is not in contact with the lever force end, a torsion spring is provided inside the elastic pressing and locking block to make the pressing end have a downward movement tendency, so that the pressing pulley can apply pressure to the circumferential surface of the workpiece to be measured; when the output shaft of the decompression cylinder is extended and applies pressure to the lever force end, it can drive the pressing end to move upward so that it drives the pressing pulley away from the workpiece to be measured.

[0009] Furthermore, the length detection mechanism includes a length detection base, a mounting sleeve, a fourth locking piece, a length detection sensor and a second slider, the length detection base is provided with a second adjustment groove, the fourth locking piece passes through the second adjustment groove and is threadedly connected to the mounting sleeve, the length detection sensor is connected to the mounting sleeve, and the second slider is provided at the bottom of the length detection base and slidingly cooperates with the first guide rail.

[0010] Furthermore, the driving mechanism includes a driving mounting base, a driving element, a coupling, a controller mounting base and a speed controller, the driving mounting base and the controller mounting base are both connected to the mounting platform, the driving element is connected to the driving mounting base, the driving element is connected to the transmission structure through a coupling, the speed controller is connected to the controller mounting base, and the speed controller is provided with a speed adjustment button and a switch button.

[0011] Furthermore, the runout detection mechanism includes a detection instrument, an instrument mounting block, a rotating connecting plate, an instrument rotating base, an instrument movable base, a linear drive cylinder, a second guide rail, a third slider and a mechanism base. The detection instrument is connected to the rotating connecting plate via the instrument mounting block. The rotating connecting plate is connected to the instrument rotating base in an angle-adjustable manner. The instrument rotating base, the instrument movable base and the third slider are connected in sequence. The third slider is slidably matched with the second guide rail. The second guide rail is installed on the mechanism base. The linear drive cylinder can drive the instrument movable base to move so that the detection instrument approaches or moves away from the workpiece to be measured.

[0012] Furthermore, a base body, a rotating shaft clamping piece, a clamping bolt and a rotating shaft body are provided on the rotating base of the instrument. The rotating shaft body is fixedly connected to the rotating connecting plate, and a mounting shaft hole is formed between the base body and the rotating shaft clamping piece. By tightening or loosening the clamping bolt, the distance between the rotating shaft clamping piece and the base body can be changed to change the size of the mounting shaft hole; when the clamping bolt is loosened, the rotating shaft body and the mounting shaft hole are rotatably matched to adjust the angle of the rotating connecting plate; when the clamping bolt is tightened, the rotating shaft body and the mounting shaft hole are interference matched to prevent the rotating shaft body and the rotating connecting plate from rotating.

[0013] Furthermore, a third guide rail is provided on the mounting platform, and the runout detection mechanism also includes a fifth locking piece and a fourth slider arranged at the bottom of the mechanism base, the fourth slider slidingly cooperates with the third guide rail, and the fifth locking piece is used to lock or unlock the position of the runout detection mechanism.

[0014] The beneficial effects of the present invention are: (1) The present invention presses the workpiece to be measured onto the support assembly by means of a clamping and positioning mechanism, positions the front end face of the workpiece to be measured by means of a front end positioning assembly, and detects the position of the rear end face of the workpiece to be measured by means of a length detection mechanism, thereby realizing detection of whether the total length of the workpiece to be measured is qualified; the workpiece to be measured is driven to rotate around its own axis by means of a driving mechanism, thereby being able to detect the runout of the circumferential surface of the workpiece to be measured by means of a runout detection mechanism.

[0015] (2) The friction welding quality detection device of the present invention can be used both manually and automatically. When used for manual detection, workers can load, read and unload the workpiece to be tested, which is easy to operate and has high detection efficiency. When used for automatic detection, the friction welding quality detection device is connected to the automatic control system in the upper computer for communication. The length detection mechanism and the runout detection mechanism can use sensors or instruments with data communication functions. The automatic control system can obtain the data detected by the length detection mechanism and the runout detection mechanism. The automatic control system can control the working state of the decompression cylinder of the clamping and positioning mechanism, control the switch and speed of the driving element of the driving mechanism, and control the working state of the linear driving cylinder of the runout detection mechanism.

[0016] (3) The friction welding quality detection device of the present invention has strong versatility and is suitable for workpieces of different lengths, different diameters, and different detection positions. It is easy to operate and has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a partially enlarged structural schematic diagram of the present invention (with a workpiece to be tested installed); Figure 3 This is one of the structural schematic diagrams of the first supporting member, the head end positioning assembly, the pressing and positioning mechanism, and the driving mechanism of the present invention; Figure 4 This is the second structural schematic diagram of the first supporting member, the head end positioning assembly, the pressing and positioning mechanism and the driving mechanism of the present invention; Figure 5 is a schematic structural diagram of a second supporting member of the present invention; Figure 6 It is a structural schematic diagram of the length detection mechanism of the present invention; Figure 7 It is a structural schematic diagram of the runout detection mechanism of the present invention; Figure 8 It is a schematic diagram of the exploded structure of the runout detection mechanism of the present invention (the fifth locking member is not shown).

[0018] The following are marked in the accompanying drawings: 1-installation platform, 11-first guide rail, 12-third guide rail; 2-support positioning mechanism, 21-first support member, 211-first support base, 212-rotating support shaft, 213-transmission structure, 214-support wheel, 22-second support member, 221-second support base, 222-V-shaped support groove, 223-second locking member, 224-first slider, 23-head end positioning assembly, 231-axial positioning adjustment seat, 232-adjustable positioning rod, 233-first locking member, 234-guide hole; 3-pressing and positioning mechanism, 31-cylinder mounting bracket, 32-cylinder adjustment base, 33-decompression cylinder, 34-adjustable mounting bracket, 35-third locking member, 36-elastic pressing locking block, 37-pressing pulley, 38-first adjusting slot; 4-driving mechanism, 41-driving mounting base, 42-driving element, 43-coupling, 44-controller mounting base, 45-speed controller, 46-speed regulating button, 47-switch button; 5-length detection mechanism, 51-length detection base, 52-installation sleeve, 53-fourth locking member, 54-length detection sensor, 55-second slider, 56-second adjustment slot; 6-runout detection mechanism, 61-detection instrument, 62-instrument mounting block, 63-rotating connecting plate, 64-instrument rotating base, 641-base body, 642-rotating shaft clamping member, 643-clamping bolt, 644-rotating shaft body, 65-instrument moving base, 66-linear driving cylinder, 67-second guide rail, 68-third slider, 69-mechanism base, 610-fifth locking member, 611-fourth slider; 7- workpiece to be measured, 71- valve stem, 72- valve disc, 73- welding part. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-Figure 8As shown, a friction welding quality detection device in this embodiment includes a mounting platform 1, and also includes a support positioning mechanism 2, a clamping positioning mechanism 3, a driving mechanism 4, a length detection mechanism 5 and a runout detection mechanism 6 arranged on the mounting platform 1; the support positioning mechanism 2 includes a support assembly and a head end positioning assembly 23, the support assembly is used to provide support for the circumferential surface of the workpiece 7 to be measured, a clamping space is formed between the clamping positioning mechanism 3 and the support assembly, and the clamping positioning mechanism 3 is used to press the workpiece 7 to be measured on the support assembly; the head end positioning assembly 23 and the length detection mechanism 5 are respectively arranged on two different sides of the workpiece 7 to be measured in the axial direction, the head end positioning assembly 23 is used to provide positioning for the head end face of the workpiece 7 to be measured, and the length detection mechanism 5 is used to detect the position of the tail end face of the workpiece 7 to be measured; the driving mechanism 4 is used to drive the workpiece 7 to be measured to rotate around its own axis, and the runout detection mechanism 6 is used to detect the runout of the circumferential surface of the workpiece 7 to be measured.

[0021] The workpiece 7 to be tested is taken as a valve after welding for description. The valve after welding has three parts: a valve stem 71 , a valve disc 72 and a welding part 73 .

[0022] During the inspection, the valve stem 71 is pressed against the support assembly by the clamping and positioning mechanism 3, the head end positioning assembly 23 positions the head end face of the valve stem 71, and the position of the tail end face of the valve disc 72 is detected by the length detection mechanism 5, thereby realizing the detection of whether the total length of the workpiece 7 to be tested is qualified; the valve stem 71 is driven by the driving mechanism 4 to rotate around its own axis, and the valve disc 72 and the welding part 73 also rotate synchronously with the valve stem 71, so that the runout of the circumferential surface of the valve stem 71 or the valve disc 72 of the workpiece 7 to be tested close to the welding part 73 can be detected by the runout detection mechanism 6.

[0023] The friction welding quality detection device can be used both manually and automatically. When used for manual detection, workers can load, read and unload the workpiece 7 to be tested, which is easy to operate and has high detection efficiency. When used for automatic detection, the friction welding quality detection device is connected to the automatic control system in the host computer for communication, and the length detection mechanism 5 and the runout detection mechanism 6 can use sensors or instruments with data communication functions. The automatic control system can obtain the data detected by the length detection mechanism 5 and the runout detection mechanism 6. The automatic control system can control the working state of the decompression cylinder 33 of the clamping and positioning mechanism 3, the switch and speed of the driving element 42 of the driving mechanism 4, and the working state of the linear driving cylinder 66 of the runout detection mechanism 6.

[0024] The detected data is directly sent to the automatic control system in the host computer, and the automatic control system automatically determines whether the detected length data and runout data are qualified, further improving the detection efficiency.

[0025] In this embodiment, the support assembly includes a first support member 21 and a second support member 22 which are arranged at intervals along the axial direction of the workpiece 7 to be measured; the first support member 21 includes a first support base 211 and two rotating support shafts 212, the middle parts of the two rotating support shafts 212 are rotatably matched with the first support base 211, the head ends of the two rotating support shafts 212 both extend forward from the first support base 211 and are both provided with a transmission structure 213, the transmission structure 213 is transmission-connected to the driving mechanism 4, the tail ends of the two rotating support shafts 212 both extend backward from the first support base 211 and are both provided with support wheels 214, and the two support wheels 214 are used to contact the circumferential surface of the workpiece 7 to be measured; the second support member 22 includes a second support base 221 and a V-shaped support groove 222 arranged on the second support base 221.

[0026] The transmission structure 213 can be a belt transmission structure, a chain transmission structure or a gear transmission structure. The driving mechanism 4 drives the two rotating support shafts 212 to rotate through the coupling 43 and the transmission structure 213, thereby driving the two support wheels 214 to rotate. Since the two support wheels 214 are in contact with the circumferential surface of the workpiece 7 to be measured, and the clamping and positioning mechanism 3 presses the valve stem 71 on the support assembly, the two support wheels 214 can drive the valve stem 71 to rotate, thereby driving the workpiece 7 to be measured to rotate as a whole.

[0027] The first supporting member 21 and the second supporting member 22 are arranged at intervals, and can respectively support different positions of the workpiece 7 to be measured.

[0028] In this embodiment, the head end positioning assembly 23 includes an axial positioning adjustment seat 231, an adjustable positioning rod 232 and a first locking member 233. The axial positioning adjustment seat 231 is provided with a plurality of guide holes 234 that pass through in the front-to-back direction. The plurality of guide holes 234 are spaced apart in the up-and-down direction. The adjustable positioning rod 232 is inserted into one of the guide holes 234, and the front and rear ends of the adjustable positioning rod 232 both extend out of the guide hole 234. The adjustable positioning rod 232 is used to contact the head end face of the workpiece 7 to be measured, and the first locking member 233 is used to lock or unlock the position of the adjustable positioning rod 232.

[0029] Three guide holes 234 may be arranged at intervals in the vertical direction. According to the center position of the head end face of the workpiece 7 to be measured, the adjustable positioning rod 232 is installed into one of the guide holes 234, and the end face of the adjustable positioning rod 232 is made to abut against the center position of the head end face of the workpiece 7 to be measured. The axes of the three guide holes 234 are on the same plane. The first locking member 233 may be a bolt. Loosening the first locking member 233 can make the end of the first locking member 233 withdraw from each guide hole 234 and move away from the adjustable positioning rod 232, so that the adjustable positioning rod 232 can slide freely. Changing the extension amount of the end of the adjustable positioning rod 232 can provide positioning contact surfaces at different positions for the head end face of the workpiece 7 to be measured. Tightening the first locking member 233 can make the ends of the first locking member 233 extend into each guide hole 234 in sequence from top to bottom and finally press on the adjustable positioning rod 232, thereby fixing the adjustable positioning rod 232 and ensuring the positioning reliability of the adjustable positioning rod 232.

[0030] In this embodiment, a first guide rail 11 is provided on the mounting platform 1, and the second supporting member 22 also includes a second locking member 223 and a first slider 224 provided at the bottom of the second supporting base 221, the first slider 224 is slidably matched with the first guide rail 11, and the second locking member 223 is used to lock or unlock the position of the second supporting member 22.

[0031] The second locking member 223 , the first slider 224 and the first guide rail 11 cooperate to change the position of the second support member 22 , that is, to change the distance between the second support member 22 and the first support member 21 , so as to adapt to workpieces 7 of different lengths.

[0032] In this embodiment, the clamping and positioning mechanism 3 includes a cylinder mounting bracket 31, a cylinder adjustment base 32, a decompression cylinder 33, an adjustable mounting bracket 34, a third locking piece 35, an elastic pressing locking block 36 and a pressing pulley 37. The cylinder adjustment base 32 is arranged on the mounting platform 1, and the decompression cylinder 33 is connected to the cylinder mounting bracket 31. The cylinder mounting bracket 31 is connected to the cylinder adjustment base 32 in a positionally adjustable manner. The adjustable mounting bracket 34 is provided with a first adjusting groove 38 with a length along the up and down directions. The third locking piece 35 passes through the first adjusting groove 38 and is threadedly connected to the first support base 211; the middle part of the elastic pressing locking block 36 is rotatably connected to the top of the adjustable mounting bracket 34, and the elastic pressing locking block 36 is pressed against the The end close to the workpiece 7 to be measured is the pressing end, the end of the elastic pressing and locking block 36 away from the workpiece 7 to be measured is the lever force end, the pressing pulley 37 is rotatably installed on the pressing end, the pressing pulley 37 is located above the two supporting wheels 214, and the lever force end is suspended and located below the decompression cylinder 33; when the decompression cylinder 33 is not in contact with the lever force end, a torsion spring is provided inside the elastic pressing and locking block 36 to make the pressing end have a downward movement tendency, so that the pressing pulley 37 can apply pressure to the circumferential surface of the workpiece 7 to be measured; when the output shaft of the decompression cylinder 33 is extended and pressure is applied to the lever force end, it can drive the pressing end to move upward so that it drives the pressing pulley 37 away from the workpiece 7 to be measured.

[0033] A plurality of strip grooves are provided on the cylinder mounting bracket 31. The cylinder mounting bracket 31 is bolted through the strip grooves and can be adjusted relative to the cylinder adjustment base 32. By changing the position of the cylinder mounting bracket 31, the position of the decompression cylinder 33 relative to the force-applying end of the lever can be changed, so that the decompression cylinder 33 can provide different pressing torques, thereby avoiding excessive pressure on the mechanical structure and shortening its life due to excessive pressure in the decompression cylinder 33, or failure to press due to too little pressure.

[0034] The adjustable mounting bracket 34 can be adjusted in the upper and lower mounting positions through the first adjusting slot 38 and the third locking member 35 , so as to adapt to the workpieces 7 to be measured of different diameters.

[0035] When the output shaft of the decompression cylinder 33 is extended and pressure is applied to the lever force end, the pressing end can be driven to move upward so that it drives the pressing pulley 37 away from the workpiece 7 to be measured, thereby facilitating the loading and unloading of the workpiece 7 to be measured.

[0036] A torsion spring is provided inside the elastic pressing locking block 36 so that the pressing end has a downward movement tendency. The pressing pulley 37 can apply pressure to the circumferential surface of the workpiece 7 to be measured, ensuring that the circumferential surface of the workpiece 7 to be measured is in contact with the two supporting wheels 214, ensuring that the two supporting wheels 214 can drive the workpiece 7 to be measured to rotate by friction when rotating, and the pressing pulley 37 can rotate on its own without affecting the rotation of the workpiece 7 to be measured. The two supporting wheels 214 and the pressing pulley 37 fix the workpiece 7 to be measured from three different positions respectively to prevent the axis of the workpiece 7 to be measured from tilting during the detection process.

[0037] In this embodiment, the length detection mechanism 5 includes a length detection base 51, a mounting sleeve 52, a fourth locking piece 53, a length detection sensor 54 and a second slider 55. The length detection base 51 is provided with a second adjustment groove 56. The fourth locking piece 53 passes through the second adjustment groove 56 and is threadedly connected to the mounting sleeve 52. The length detection sensor 54 is connected to the mounting sleeve 52. The second slider 55 is arranged at the bottom of the length detection base 51 and slides with the first guide rail 11.

[0038] The length detecting mechanism 5 can adapt to workpieces 7 of different diameters through the cooperation of the second adjusting groove 56, the fourth locking member 53 and the mounting sleeve 52. The length detecting mechanism 5 can adapt to workpieces 7 of different lengths through the cooperation of the second slider 55 and the first guide rail 11.

[0039] The measuring position of the length detection sensor 54 is at the non-rotating axis of the tail end face of the valve disc 72 of the workpiece 7 to be measured. During the rotation of the workpiece 7 to be measured, data at different positions of the tail end face of the workpiece 7 to be measured can be collected. The length detection sensor 54 can be a displacement sensor or a distance sensor. The automatic control system in the host computer can obtain the detection data of the length detection sensor 54. Before the detection, a standard workpiece that meets the requirements is placed on the friction welding quality detection device for calibration. During the rotation of the standard workpiece, multiple data are collected and the average is calculated as the standard length reference value. When the workpiece 7 to be measured is subsequently measured, multiple length measurement values ​​are collected during the rotation of the workpiece 7 to be measured, and the maximum and minimum values ​​of the multiple length measurement values ​​are respectively subtracted from the standard length reference value. When the absolute value of the difference exceeds the set range, it means that the length is unqualified and the compression amount of the friction welding does not meet the standard. Through the above scheme, the automatic measurement and data processing of the compression amount of the workpiece 7 to be measured of different sizes and types are realized.

[0040] In this embodiment, the driving mechanism 4 includes a driving mounting base 41, a driving element 42, a coupling 43, a controller mounting base 44 and a speed controller 45. The driving mounting base 41 and the controller mounting base 44 are both connected to the mounting platform 1. The driving element 42 is connected to the driving mounting base 41. The driving element 42 is connected to the transmission structure 213 through the coupling 43. The speed controller 45 is connected to the controller mounting base 44. The speed controller 45 is provided with a speed control button 46 and a switch button 47. The driving element 42 can be a motor. The speed controller 45 also communicates with the automatic control system in the upper computer, that is, in addition to being manually controlled by the speed control button 46 and the switch button 47, the speed controller 45 can also communicate directly with the automatic control system and directly control the switch of the driving element 42 through the automatic control system.

[0041] In this embodiment, the runout detection mechanism 6 includes a detection instrument 61, an instrument mounting block 62, a rotating connecting plate 63, an instrument rotating base 64, an instrument movable base 65, a linear drive cylinder 66, a second guide rail 67, a third slider 68 and a mechanism base 69. The detection instrument 61 is connected to the rotating connecting plate 63 through the instrument mounting block 62. The rotating connecting plate 63 is connected to the instrument rotating base 64 in an angle-adjustable manner. The instrument rotating base 64, the instrument movable base 65 and the third slider 68 are connected in sequence. The third slider 68 is slidably matched with the second guide rail 67. The second guide rail 67 is installed on the mechanism base 69. The linear drive cylinder 66 can drive the instrument movable base 65 to move so that the detection instrument 61 is close to or away from the workpiece 7 to be measured.

[0042] In this embodiment, the instrument rotating base 64 is provided with a base body 641, a rotating shaft clamping piece 642, a clamping bolt 643 and a rotating shaft body 644. The rotating shaft body 644 is fixedly connected to the rotating connecting plate 63. A mounting shaft hole is formed between the base body 641 and the rotating shaft clamping piece 642. By tightening or loosening the clamping bolt 643, the distance between the rotating shaft clamping piece 642 and the base body 641 can be changed to change the size of the mounting shaft hole; when the clamping bolt 643 is loosened, the rotating shaft body 644 is rotatably matched with the mounting shaft hole to adjust the angle of the rotating connecting plate 63; when the clamping bolt 643 is tightened, the rotating shaft body 644 is interference matched with the mounting shaft hole to prevent the rotating shaft body 644 and the rotating connecting plate 63 from rotating.

[0043] The detection instrument 61 can be a micrometer with data communication function. By changing the angle of the rotating connecting plate 63 and the instrument rotating base 64, the direction of the detection end of the micrometer can be adjusted to adapt to the workpieces 7 of different diameters to be measured, ensuring that the detection end of the micrometer is parallel to the radial direction of the workpiece 7 to ensure the accuracy of the measurement data.

[0044] The detection instrument 61 and the linear drive cylinder 66 are both in communication with the automatic control system in the upper computer. The automatic control system can control the working state of the linear drive cylinder 66, so that the linear drive cylinder 66 can drive the detection instrument 61, the instrument mounting block 62, the rotating connecting plate 63, the instrument rotating base 64 and the instrument moving base 65 to move to the position of the whole, which includes the detection position close to the workpiece 7 to be measured and the initial loading and unloading position away from the workpiece 7 to be measured. The detection instrument 61 is close to the workpiece 7 to be measured until the detection instrument 61 moves to the detection position, so that the runout can be detected; the detection instrument 61 is moved away from the workpiece 7 to be measured until the detection instrument 61 moves to the initial loading and unloading position, so that the loading and unloading of the workpiece 7 to be measured can be facilitated.

[0045] The automatic control system can obtain the detection data of the detection instrument 61, collect the micrometer measurement values ​​multiple times during the rotation of the workpiece 7 to be measured, and use the difference between the maximum and minimum values ​​of the micrometer measurement values ​​as the runout of the workpiece 7 to be measured. The detected runout is compared with the preset standard runout to determine whether the runout of the workpiece 7 to be measured is qualified. The preset standard runout is the maximum value of the runout allowed by manual input in advance. For example, if the preset standard runout is 0.25, then the detected runout is judged to be unqualified if it exceeds 0.25. Through the above scheme, the automatic measurement and data processing of the runout of workpieces 7 to be measured of different sizes and varieties are realized.

[0046] In this embodiment, the installation platform 1 is provided with a third guide rail 12, and the runout detection mechanism 6 further includes a fifth locking member 610 and a fourth slider 611 provided at the bottom of the mechanism base 69, the fourth slider 611 is slidably matched with the third guide rail 12, and the fifth locking member 610 is used to lock or unlock the position of the runout detection mechanism 6. The position of the runout detection mechanism 6 is adjustable to accommodate workpieces 7 of different lengths and different positions to be detected. If it is necessary to detect the runout at different positions of the same workpiece 7 to be detected, multiple runout detection mechanisms 6 can be arranged at intervals on the third guide rail 12.

[0047] The following is an explanation of the use of the friction welding quality detection device for automatic detection, with the workpiece 7 to be tested being a valve after welding. The valve after welding has three parts: a valve stem 71, a valve disc 72, and a welding part 73. The friction welding quality detection device is connected to the automatic control system in the upper computer for communication. The length detection mechanism 5 and the runout detection mechanism 6 can use sensors or instruments with data communication functions. The automatic control system can obtain the data detected by the length detection mechanism 5 and the runout detection mechanism 6. The automatic control system can control the working state of the decompression cylinder 33 of the clamping and positioning mechanism 3, the switch and speed of the driving element 42 of the driving mechanism 4, and the working state of the linear drive cylinder 66 of the runout detection mechanism 6. During automatic detection, a mechanical arm capable of automatic loading and unloading that cooperates with the friction welding quality detection device is also required to be used in conjunction with the automatic control system in the upper computer. The mechanical arm is connected to the automatic control system in the upper computer for communication.

[0048] The method of use comprises the following steps: S1. Preparation for testing: adjust the friction welding quality testing device to match the workpiece to be tested, and debug and calibrate the automatic control system and robotic arm. Specifically, the following steps are included: S101. Preliminarily place the standard workpiece on the friction welding quality detection device.

[0049] S102. According to the length of the standard workpiece and the position of the runout to be detected, adjust the positions of the second support member 22, the length detection mechanism 5 and the runout detection mechanism 6 to ensure that the second support member 22 can provide support for the middle part of the valve disc 72, ensure that there is a certain distance between the length detection mechanism 5 and the rear end face of the valve disc 72, and ensure that the runout detection mechanism 6 corresponds to the position of the runout to be detected. The position of the runout to be detected can be a certain position on the valve stem 71 or the valve disc 72 close to the welding part 73.

[0050] S103. According to the center position of the head end face of the standard workpiece, install the adjustable positioning rod 232 into one of the guide holes 234, and try to make the end face of the adjustable positioning rod 232 rest against the center position of the head end face of the standard workpiece. At this time, the first locking piece 233 is not tightened, and the adjustable positioning rod 232 can be moved to change the extension amount of the end of the adjustable positioning rod 232. After adjusting to the appropriate position, tightening the first locking piece 233 can make the end of the first locking piece 233 extend into each guide hole 234 from top to bottom in turn and finally press on the adjustable positioning rod 232, thereby fixing the adjustable positioning rod 232.

[0051] S104. According to the diameter of the standard workpiece, adjust the position of the adjustable mounting bracket 34 so that the pressing pulley 37 can apply pressure to the circumferential surface of the standard workpiece to ensure that the circumferential surface of the standard workpiece is in contact with the two support wheels 214, and that the two support wheels 214 can drive the standard workpiece to rotate by friction when rotating; adjust the position of the cylinder mounting bracket 31 so that the decompression cylinder 33 can provide a suitable pressing torque to avoid excessive pressure on the mechanical structure and shortening its life due to excessive pressure of the decompression cylinder 33, or failure to press due to too little pressure; adjust the angle of the rotating connecting plate 63 and the instrument rotating base 64, thereby adjusting the direction of the detection end of the detection instrument 61 to ensure that the detection end of the detection instrument 61 is parallel to the radial direction of the standard workpiece.

[0052] S105. According to the axial position and area size of the tail end face of the valve disc 72 of the standard workpiece, the position of the length detection sensor 54 is adjusted by cooperating with the second adjustment groove 56, the fourth locking piece 53 and the mounting sleeve 52, so that the measuring position of the length detection sensor 54 is at the non-rotating axis of the tail end face of the valve disc 72 of the standard workpiece, thereby ensuring that the subsequent standard workpiece and the workpiece to be measured 7 can collect data at different positions of their tail end faces during the rotation process.

[0053] S105. A control instruction is sent to the speed controller 45 through the automatic control system to start the driving element 42 to work. The driving element 42 drives the two rotating support shafts 212 of the first support member 21 to rotate through the coupling 43 and the transmission structure 213, thereby driving the two support wheels 214 to rotate. Since the two support wheels 214 are in contact with the circumferential surface of the standard workpiece, and the pressing pulley 37 of the clamping and positioning mechanism 3 presses the valve stem 71 onto the support assembly, the two support wheels 214 can drive the valve stem 71 to rotate, thereby driving the standard workpiece to rotate as a whole.

[0054] S106, acquiring detection data of the displacement sensor through the automatic control system, collecting multiple data during the rotation of the standard workpiece and calculating the average value as a reference value of the standard length.

[0055] S2. Send a control instruction to the speed controller 45 through the automatic control system to stop the driving element 42 from working; control the output shaft of the decompression cylinder 33 to extend and apply pressure to the lever force end through the automatic control system, thereby driving the pressing end to move upward so that it drives the pressing pulley 37 away from the standard workpiece, remove the standard workpiece and place the standard workpiece in the silo.

[0056] S3, the robot arm motion path planning, based on which the robot arm motion program parameters are set and debugged.

[0057] The automatic control system has a built-in motion program for the robotic arm, including a series of actions including the robotic arm moving from an initial position to a silo to grab a workpiece to be tested, placing the workpiece to be tested on a friction welding quality testing device, waiting for test results, moving the workpiece to be tested to a qualified product storage location or a failed product storage location after the test is completed based on the test results, putting down the workpiece, and finally returning to the initial position.

[0058] The debugging and running process is as follows: control instructions are sent to the robotic arm through the automatic control system, the robotic arm grabs the standard workpiece in the silo and executes the above-mentioned motion program. During the process, manual monitoring is performed throughout the process to determine whether the movement is accurate. If it is accurate, the debugging and running is successfully completed. If it is inaccurate, the parameters of the motion program are modified and the debugging and running is performed again until the debugging and running is successfully completed.

[0059] S3. A control command is sent to the robot arm through the automatic control system. The robot arm moves from the initial position to the silo, grabs the workpiece 7 to be tested in the silo and installs it on the friction welding quality detection device. The head end face of the workpiece 7 to be tested abuts against the end face of the adjustable positioning rod 232. The output shaft of the decompression cylinder 33 is shortened through the automatic control system, and the pressure applied to the lever force end is stopped. The torsion spring of the elastic pressing locking block 36 causes the pressing end to move downward, and the pressing pulley 37 of the elastic pressing locking block 36 applies pressure to the circumferential surface of the workpiece 7 to be tested.

[0060] S4. A control instruction is sent to the speed controller 45 through the automatic control system to start the driving element 42 to work. The driving element 42 drives the two rotating support shafts 212 of the first supporting member 21 to rotate through the coupling 43 and the transmission structure 213, thereby driving the two supporting wheels 214 to rotate. Since the two supporting wheels 214 are in contact with the circumferential surface of the workpiece 7 to be measured, and the pressing pulley 37 of the clamping and positioning mechanism 3 presses the valve stem 71 onto the supporting assembly, the two supporting wheels 214 can drive the valve stem 71 to rotate, thereby driving the workpiece 7 to be measured to rotate as a whole.

[0061] S5, the detection data of the displacement sensor is obtained through the automatic control system, and multiple length measurement values ​​are collected during the rotation of the workpiece 7 to be measured. The maximum and minimum values ​​of the multiple length measurement values ​​are respectively subtracted from the standard length reference value obtained in S106 through the automatic control system. If the absolute value of the difference exceeds the set range, it means that the length is unqualified, and the automatic control system determines that the compression amount of the friction welding is not up to standard, and then step S7 is performed. If the absolute value of the difference does not exceed the set range, it means that the length is qualified, and the automatic control system determines that the compression amount of the friction welding is up to standard, and then step S6 is performed.

[0062] S6, the automatic control system controls the working state of the linear drive cylinder 66, so that the linear drive cylinder 66 can drive the detection instrument 61 to approach the workpiece 7 to be measured, and the detection instrument 61 moves from the initial loading and unloading position to the detection position. The automatic control system can obtain the detection data of the detection instrument 61, and collect the micrometer measurement values ​​multiple times during the rotation of the workpiece 7 to be measured. After the collection is completed, the automatic control system controls the working state of the linear drive cylinder 66, so that the linear drive cylinder 66 can drive the detection instrument 61 away from the workpiece 7 to be measured, and the detection instrument 61 moves from the detection position to the initial loading and unloading position. At the same time, the automatic control system uses the maximum and minimum values ​​of the obtained micrometer measurement values ​​as the runout of the workpiece 7 to be measured, and compares the detected runout with the preset standard runout (the preset standard runout is the maximum runout value allowed by manual pre-input, for example, if the preset standard runout is 0.25, then the detected runout exceeds 0.25 and is judged to be unqualified), and judges whether the runout of the workpiece 7 to be measured is qualified. If the runout of the workpiece 7 to be measured is unqualified, step S7 is performed at this time. If the runout of the workpiece 7 is qualified, step S8 is performed.

[0063] S7. Send a control instruction to the speed controller 45 through the automatic control system to stop the driving element 42 from working; control the output shaft of the decompression cylinder 33 to extend and apply pressure to the lever force end through the automatic control system, thereby driving the pressing end to move upward so that it drives the pressing pulley 37 away from the workpiece to be tested 7. The automatic control system controls the robotic arm to move the workpiece to be tested to the storage position for defective products, puts down the workpiece, and the robotic arm returns to the initial position.

[0064] S8. Send a control instruction to the speed controller 45 through the automatic control system to stop the driving element 42 from working; control the output shaft of the decompression cylinder 33 to extend and apply pressure to the lever force end through the automatic control system, thereby driving the pressing end to move upward so that it drives the pressing pulley 37 away from the workpiece to be tested 7. The automatic control system controls the robotic arm to move the workpiece to be tested to the qualified product storage position, puts down the workpiece, and the robotic arm returns to the initial position.

[0065] S9, repeat steps S3-S8 to inspect another workpiece 7 to be inspected in the silo to achieve batch inspection.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A friction welding quality detection device, comprising a mounting platform (1), characterized in that: It also includes a supporting positioning mechanism (2), a pressing positioning mechanism (3), a driving mechanism (4), a length detection mechanism (5) and a runout detection mechanism (6) which are arranged on the installation platform (1); The support positioning mechanism (2) comprises a support component and a head end positioning component (23), the support component is used to provide support for the circumferential surface of the workpiece (7) to be measured, a clamping space is formed between the pressing positioning mechanism (3) and the support component, and the pressing positioning mechanism (3) is used to press the workpiece (7) to be measured onto the support component; The head end positioning component (23) and the length detection mechanism (5) are respectively arranged on two different sides of the workpiece (7) to be measured in the axial direction, the head end positioning component (23) is used to provide positioning for the head end face of the workpiece (7) to be measured, and the length detection mechanism (5) is used to detect the position of the tail end face of the workpiece (7) to be measured; The driving mechanism (4) is used to drive the workpiece to be measured (7) to rotate around its own axis, and the runout detection mechanism (6) is used to detect the runout of the circumferential surface of the workpiece to be measured (7).

2. The friction welding quality detection device according to claim 1, characterized in that: The support assembly comprises a first support member (21) and a second support member (22) which are arranged at intervals along the axial direction of the workpiece (7) to be measured; the first support member (21) comprises a first support base (211) and two rotating support shafts (212); the middle parts of the two rotating support shafts (212) are rotatably matched with the first support base (211); the head ends of the two rotating support shafts (212) both extend forward from the first support base (211) and are both provided with a transmission structure (213); the transmission structure (213) is transmission-connected to the driving mechanism (4); the tail ends of the two rotating support shafts (212) both extend backward from the first support base (211) and are both provided with a support wheel (214); the two support wheels (214) are used to contact the circumferential surface of the workpiece (7) to be measured; the second support member (22) comprises a second support base (221) and a V-shaped support groove (222) provided on the second support base (221).

3. The friction welding quality detection device according to claim 2 is characterized in that: The head end positioning assembly (23) comprises an axial positioning adjustment seat (231), an adjustable positioning rod (232) and a first locking member (233); the axial positioning adjustment seat (231) is provided with a plurality of guide holes (234) extending through in the front-to-back direction; the plurality of guide holes (234) are arranged at intervals in the up-down direction; the adjustable positioning rod (232) is inserted into one of the guide holes (234); and the front and rear ends of the adjustable positioning rod (232) both extend out of the guide hole (234); the adjustable positioning rod (232) is used to contact the head end face of the workpiece (7) to be measured; and the first locking member (233) is used to lock or unlock the position of the adjustable positioning rod (232).

4. The friction welding quality detection device according to claim 2, characterized in that: The mounting platform (1) is provided with a first guide rail (11), and the second supporting member (22) further comprises a second locking member (223) and a first sliding block (224) provided at the bottom of the second supporting base (221), the first sliding block (224) being slidably matched with the first guide rail (11), and the second locking member (223) being used to lock or unlock the position of the second supporting member (22).

5. The friction welding quality detection device according to claim 4, characterized in that: The pressing and positioning mechanism (3) comprises a cylinder mounting bracket (31), a cylinder adjustment base (32), a decompression cylinder (33), an adjustable mounting bracket (34), a third locking member (35), an elastic pressing and locking block (36) and a pressing pulley (37); the cylinder adjustment base (32) is arranged on the mounting platform (1); the decompression cylinder (33) is connected to the cylinder mounting bracket (31); the cylinder mounting bracket (31) is connected to the cylinder adjustment base (32) in a positionally adjustable manner; the adjustable mounting bracket (34) is provided with a first adjusting groove (38) having a length in the up-down direction; the third locking member (35) passes through the first adjusting groove (38) and is threadedly connected to the first support base (211); the elastic pressing and locking block (31) is connected to the cylinder adjustment base (32) in a positionally adjustable manner; 6) is rotatably connected to the top of the adjustable mounting bracket (34), the end of the elastic pressing and locking block (36) close to the workpiece to be measured (7) is the pressing end, the end of the elastic pressing and locking block (36) away from the workpiece to be measured (7) is the lever force end, the pressing pulley (37) is rotatably mounted on the pressing end, the pressing pulley (37) is located above the two support wheels (214), and the lever force end is suspended and located below the decompression cylinder (33); when the decompression cylinder (33) is not in contact with the lever force end, a torsion spring is provided inside the elastic pressing and locking block (36) so that the pressing end has a downward movement tendency, so that the pressing pulley (37) can apply pressure to the circumferential surface of the workpiece to be measured (7); When the output shaft of the decompression cylinder (33) is extended and applies pressure to the lever force-applying end, the pressing end can be driven to move upward so that it drives the pressing pulley (37) away from the workpiece (7) to be measured.

6. The friction welding quality detection device according to claim 5, characterized in that: The length detection mechanism (5) comprises a length detection base (51), a mounting sleeve (52), a fourth locking member (53), a length detection sensor (54) and a second slider (55); the length detection base (51) is provided with a second adjustment slot (56); the fourth locking member (53) passes through the second adjustment slot (56) and is threadedly connected to the mounting sleeve (52); the length detection sensor (54) is connected to the mounting sleeve (52); and the second slider (55) is provided at the bottom of the length detection base (51) and is slidably matched with the first guide rail (11).

7. The friction welding quality detection device according to any one of claims 2 to 5, characterized in that: The driving mechanism (4) comprises a driving mounting base (41), a driving element (42), a coupling (43), a controller mounting base (44) and a speed controller (45); the driving mounting base (41) and the controller mounting base (44) are both connected to the mounting platform (1); the driving element (42) is connected to the driving mounting base (41); the driving element (42) is connected to the transmission structure (213) via the coupling (43); the speed controller (45) is connected to the controller mounting base (44); and a speed regulating button (46) and a switch button (47) are provided on the speed controller (45).

8. The friction welding quality detection device according to claim 1, characterized in that: The runout detection mechanism (6) comprises a detection instrument (61), an instrument mounting block (62), a rotating connecting plate (63), an instrument rotating base (64), an instrument movable base (65), a linear drive cylinder (66), a second guide rail (67), a third slide block (68) and a mechanism base (69); the detection instrument (61) is connected to the rotating connecting plate (63) via the instrument mounting block (62); the rotating connecting plate (63) is connected to the instrument rotating base (64) in an angle-adjustable manner; the instrument rotating base (64), the instrument movable base (65) and the third slide block (68) are connected in sequence; the third slide block (68) is slidably matched with the second guide rail (67); the second guide rail (67) is mounted on the mechanism base (69); and the linear drive cylinder (66) can drive the instrument movable base (65) to move so that the detection instrument (61) approaches or moves away from the workpiece (7) to be measured.

9. The friction welding quality detection device according to claim 8, characterized in that: The instrument rotating base (64) is provided with a base body (641), a rotating shaft clamping piece (642), a clamping bolt (643) and a rotating shaft body (644); the rotating shaft body (644) is fixedly connected to the rotating connecting plate (63); a mounting shaft hole is formed between the base body (641) and the rotating shaft clamping piece (642); by tightening or loosening the clamping bolt (643), the distance between the rotating shaft clamping piece (642) and the base body (641) can be changed to change the size of the mounting shaft hole; when the clamping bolt (643) is loosened, the rotating shaft body (644) and the mounting shaft hole are rotatably matched to adjust the angle of the rotating connecting plate (63); when the clamping bolt (643) is tightened, the rotating shaft body (644) and the mounting shaft hole are interference matched to prevent the rotating shaft body (644) and the rotating connecting plate (63) from rotating.

10. The friction welding quality detection device according to claim 8, characterized in that: A third guide rail (12) is arranged on the mounting platform (1), and the runout detection mechanism (6) further comprises a fifth locking member (610) and a fourth sliding block (611) arranged at the bottom of the mechanism base (69), the fourth sliding block (611) slidably cooperates with the third guide rail (12), and the fifth locking member (610) is used to lock or unlock the position of the runout detection mechanism (6).

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