Detection device and method for detecting straightness and roundness of powder metallurgy rod piece

Abstract

The invention discloses a detection device and method for detecting the straightness and roundness of a powder metallurgy rod piece, and relates to the technical field of detection of the straightness and roundness of the powder metallurgy rod piece. A driving assembly used for driving a powder metallurgy rod piece to rotate, a supporting assembly used for supporting the powder metallurgy rod piece and a detection unit used for detecting the roundness of a round head of the powder metallurgy rod piece and the straightness of a long round rod are sequentially arranged on the table top of the workbench from left to right. The detection unit comprises a stepping motor fixedly arranged on the table top of the workbench and a rotary table fixedly arranged on an output shaft of the stepping motor, a microswitch is fixedly arranged at the bottom of each fixing rod, and an elastic piece of each microswitch is arranged downwards; a displacement sensor is fixedly arranged on the top surface of the floating plate, the movable rod is sleeved with a spring, and the upper end and the lower end of the spring are fixedly arranged on the floating plate and the long connecting plate respectively. The device has the beneficial effects that the working intensity of workers is greatly reduced, and the powder metallurgy rod piece detection efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of detecting the straightness and roundness of a powder metallurgy rod, in particular to a detection device and method for detecting the straightness and roundness of a powder metallurgy rod. Background Art

[0002] The structure of a powder metallurgy rod is as follows Figure 1~Figure 2 As shown, the powder metallurgy rod comprises a round head 1 and an elongated round rod 2, the elongated round rod 2 is coaxially arranged with the round head 1, and a step surface is formed between the elongated round rod 2 and the round head 1. The processing technology of the powder metallurgy rod is: a certain amount of metal powder is filled into the mold cavity of the forming mold, and then pressed into a blank by a pressing machine, and finally the blank is sintered by a sintering furnace. After sintering, the blank can be obtained. Figure 1~Figure 2 The powder metallurgy rod shown.

[0003] After a batch of powder metallurgy rods are produced in the workshop, the process requires that each powder metallurgy rod be tested, that is, the roundness of the round head 1 is tested, and the straightness of the long round rod 2 is tested (due to the influence of the manufacturing process, the round head 1 of some powder metallurgy rods is non-circular, and the long round rod 2 of some powder metallurgy rods is non-straight, so the roundness and straightness of the powder metallurgy rods need to be tested).

[0004] In the workshop, the method for testing the roundness and straightness of each powder metallurgy rod is: S1. The worker takes out a powder metallurgy rod to be tested and places the long round rod 2 of the powder metallurgy rod in the V-shaped groove of the V-shaped seat 3. Figure 3 As shown; S2. The worker holds a circular runout meter 4 in his right hand and supports the detection rod 5 of the circular runout meter 4 on the top surface of the circular head 1 of the powder metallurgy rod. Figure 4 As shown, and the reading on the round runout meter 4 is cleared to zero; then the worker rotates the long round rod 2 of the powder metallurgy rod with his left hand, and the long round rod 2 drives the round head 1 to rotate around its own axis, and the rotation direction is as follows Figure 4 As shown by the hollow arrow, during the rotation process, the worker observes whether the reading on the circular runout meter 4 changes. If the reading on the circular runout meter 4 changes significantly, it means that the shape of the round head 1 is non-circular, and the powder metallurgy rod is judged to be a defective product. If the reading on the circular runout meter 4 does not change, it means that the shape of the round head 1 is round, and the powder metallurgy rod is judged to be a semi-qualified product; S3, the worker supports the detection rod 5 of the circular runout meter 4 on the top surface of the long round rod 2 of the semi-qualified product, such as Figure 5As shown, and the reading on the circular runout meter 4 is cleared to zero; the worker holds the circular runout meter 4 still, and then pushes the V-shaped seat 3 by hand, and the V-shaped seat 3 drives the semi-qualified product to move synchronously toward the detection rod 5 of the stationary circular runout meter 4, and the movement direction is as shown in Figure 5 As shown by the hollow arrow, observe whether the reading on the circular runout meter 4 changes. If the reading on the circular runout meter 4 changes significantly, it means that the long round rod 2 is not straight, and the semi-qualified product is judged to be a defective product. If the reading on the roundness table 4 does not change, it means that the long round rod 2 is straight, and then the semi-qualified product is judged to be a qualified product, thereby finally completing the roundness and straightness detection of a powder metallurgy rod; S4. The worker repeats the operations of steps S1 to S3 to detect the roundness and straightness of all powder metallurgy rods in the workshop.

[0005] However, although the method used in the workshop can detect the roundness and straightness of each powder metallurgy rod, in actual operation, it still reflects the following technical defects: I. In step S2, one hand is required to hold the circular runout meter 4 still, and the other hand is required to rotate the long round rod 2 of the powder metallurgy rod to rotate the round head 1, so as to complete the roundness detection of the round head 1 of the powder metallurgy rod; and the entire detection operation requires manual operation, which not only increases the work intensity of the workers, but also reduces the detection efficiency of the powder metallurgy rod.

[0006] II. In step S3, the worker needs to hold the circular runout meter 4 with one hand and push the V-shaped seat 3 with the other hand to complete the straightness detection of the long round rod 2 of the powder metallurgy rod; and the entire detection operation requires manual operation, which not only increases the work intensity of the workers, but also reduces the detection efficiency of the powder metallurgy rod.

[0007] III. In steps S1 to S3, workers can only inspect the roundness and straightness of one powder metallurgy rod at a time, while the number of powder metallurgy rods to be inspected in the workshop is as many as 80 to 90. If workers manually inspect one by one, it will take a long time to complete the inspection of 80 to 90 powder metallurgy rods, thereby reducing the inspection efficiency of powder metallurgy rods.

[0008] Therefore, there is an urgent need for a detection device and method that can greatly reduce the workload of workers and greatly improve the efficiency of powder metallurgy rod detection. Summary of the invention

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a detection device and method for detecting the straightness and roundness of powder metallurgy rods, which greatly reduces the work intensity of workers and greatly improves the detection efficiency of powder metallurgy rods.

[0010] The object of the present invention is achieved by the following technical solutions: A detection device for detecting the straightness and roundness of a powder metallurgy rod, comprising a workbench, on the workbench, from left to right, are arranged a driving assembly for driving the powder metallurgy rod to rotate, a supporting assembly for supporting the powder metallurgy rod, and a detection unit for detecting the roundness of a round head of the powder metallurgy rod and the straightness of a long round rod; The support assembly comprises a vertical plate fixedly mounted on the workbench surface, a plurality of support seats arranged at intervals are fixedly mounted on the front end surface of the vertical plate and along its height direction, and a U-shaped groove is formed on the top surface of each support seat; The detection unit includes a stepper motor fixedly mounted on the workbench surface, a turntable fixedly mounted on the output shaft of the stepper motor, a first cylinder fixedly mounted on the left end portion of the turntable, a first side plate fixedly mounted on the action end of the piston rod of the first cylinder, a plurality of short connecting plates fixedly mounted on the left end surface of the first side plate and along its height direction, the plurality of short connecting plates are respectively opposite to the left and right sides of each support seat, a vertically arranged fixing rod is fixedly mounted on each short connecting plate, a micro switch is fixedly mounted at the bottom of each fixing rod, and the spring piece of the micro switch is arranged downward; a connecting frame is fixedly mounted on the right end surface of the upper end portion of the first side plate, a side push cylinder is fixedly mounted on the right end surface of the connecting frame, the piston rod of the side push cylinder passes through the connecting frame, and a movable plate is fixedly mounted on the extending end, a plurality of push rods are fixedly mounted on the movable plate, respectively opposite to the left and right sides of the support seat; A driving motor and a guide seat are fixed on the right end portion of the turntable, a driving gear is connected to the output shaft of the driving motor, a guide rod is slidably installed in the guide seat, a rack is fixed on the left end portion of the guide rod, the rack is meshed with the driving gear, a second cylinder is fixed on the top surface of the rack, a second side plate is fixed on the active end of the second cylinder piston rod, a plurality of long connecting plates are fixed on the right end surface of the second side plate and along its height direction, the long connecting plates are respectively opposite to each supporting seat on the left and right, a movable rod is slidably penetrated in the right end portion of each long connecting plate, a floating plate is fixed on the top of the movable rod, a displacement sensor is fixed on the top surface of the floating plate, a spring is sleeved on the movable rod, and the upper and lower ends of the spring are respectively fixed on the floating plate and the long connecting plate.

[0011] A plurality of supporting legs supported on the ground are fixedly arranged on the bottom surface of the workbench.

[0012] The width of the U-shaped groove of the support seat is equal to the diameter of the long round rod of the powder metallurgy rod.

[0013] The vertical spacing between every two adjacent support seats is equal.

[0014] The vertical spacing between every two adjacent short connecting plates is equal, and the vertical spacing between every two adjacent long connecting plates is equal.

[0015] The driving assembly includes a feed cylinder fixed on the workbench and a push plate fixed on the action end of the piston rod of the feed cylinder. A plurality of rotating cylinders are fixed on the left end surface of the push plate and spaced along its height direction. The plurality of rotating cylinders are respectively opposite to each supporting seat on the left and right. The rotating axis of the rotating cylinder passes through the push plate, and a clamping cylinder is fixed on the extending end, and the clamping head of the clamping cylinder is set to the right.

[0016] The detection device also includes a controller, which is electrically connected to the first cylinder, the second cylinder, the feed cylinder, the clamping cylinder, the drive motor, the micro switch and the displacement sensor via a signal line.

[0017] A method for detecting the straightness and roundness of a powder metallurgy rod, comprising the following steps: S1. The specific steps for installing four powder metallurgy rods are as follows: S11. The worker takes out four powder metallurgy rods to be tested, and respectively places the long round rods of the powder metallurgy rods into the U-shaped grooves of the four support seats of the support assembly, thereby pre-installing the powder metallurgy rods; S12. The worker controls the piston rod of the side push cylinder of the detection unit to extend to the left, and the piston rod drives the movable plate to move to the left. The movable plate drives the four push rods thereon to move to the left. The push rods push the round head of the powder metallurgy rod to the left. When the piston rod of the side push cylinder is fully extended, the round head of the powder metallurgy rod just abuts against the right end surface of the support seat. S13, the piston rod of the feed cylinder of the control driving assembly extends to the right, the piston rod drives the push plate to move to the right, and the push plate drives the various rotating cylinders and the clamping cylinders thereon to move to the right synchronously. When the piston rod of the feed cylinder is fully extended, the chucks of the four clamping cylinders are respectively sleeved on the outside of the left ends of the long round rods of the four powder metallurgy rods; S14, controlling the clamping cylinder to start, the clamping cylinder drives the chuck to close, and the chuck clamps and fixes the left end of the long round rod of the powder metallurgy rod; S15, control the piston rod of the side thrust cylinder to retract to the right, the piston rod drives the movable plate to move to the right, the movable plate drives the four push rods thereon to move to the right, the push rods are separated from the round heads of the powder metallurgy rods, thereby finally realizing the installation of the four powder metallurgy rods. At this time, the round heads of the four powder metallurgy rods are respectively located directly below the four micro switches; S2. Detect the roundness of the round heads of four powder metallurgy rods. The specific operation steps are as follows: S21, the piston rod of the first cylinder of the control detection unit is retracted downward, the piston rod drives the first side plate to move downward, the first side plate drives the short connecting plates thereon to move downward, the short connecting plates drive the fixing rod and the micro switch to move downward synchronously, when the piston rod of the first cylinder is fully retracted, the springs of the four micro switches are respectively pressed onto the outer cylindrical surfaces of the circular heads of the four powder metallurgy rods, at this time, the micro switch sends an electrical signal to the controller, after the controller receives the electrical signal from the micro switch, the worker clears the electrical signal on the controller; S22, the rotary cylinder of the control driving assembly is started, the rotary cylinder drives the rotary shaft to rotate, the rotary shaft drives the clamping cylinder to rotate, the clamping cylinder drives the chuck to rotate, the chuck drives the long round rod of the powder metallurgy rod to rotate, and the long round rod drives the round head to rotate relative to the stationary micro switch; During the rotation process, if a micro switch sends an electrical signal to the controller again, it means that the shape of the round head of the powder metallurgy rod corresponding to the micro switch is non-circular, and the powder metallurgy rod is judged to be a defective product. At this time, the worker controls the rotating cylinder and the clamping cylinder corresponding to the defective product to be closed, and the chuck no longer clamps the defective product. Then the worker takes the defective product away from the support seat; During the rotation process, if the micro switch does not send an electrical signal to the controller, it means that the round head of the powder metallurgy rod corresponding to the micro switch is round in shape, and the powder metallurgy rod is judged to be a semi-qualified product; S3. Check the straightness of the semi-qualified long round rods. The specific operation steps are as follows: S31, control the piston rod of the first cylinder to extend upward, the piston rod drives the first side plate to move upward, the first side plate drives the short connecting plate to move upward, the short connecting plate drives the fixing rod and the micro switch to move upward, and the micro switch is separated from the round head of the semi-qualified product; S32, the stepper motor of the control detection unit is started, the stepper motor drives the turntable to rotate, the turntable drives the first cylinder, the drive motor and the second cylinder to rotate synchronously, the second cylinder drives the second side plate to rotate synchronously, the second side plate drives the long connecting plate to rotate, the long connecting plate drives the movable rod and the displacement sensor to rotate synchronously, when the second cylinder rotates 180°, the controller controls the stepper motor to turn off, at this time, the displacement sensor enters the detection station of the long round rod of the semi-qualified product; S33, control the piston rod of the second cylinder to retract downward, the piston rod drives the second side plate to move downward, the second side plate drives the long connecting plate thereon to move downward, the long connecting plate drives the movable rod and the displacement sensor to move downward synchronously, when the piston rod of the second cylinder is fully retracted, the bottom end of the movable rod just contacts the top surface of the right end of the long round rod of the semi-qualified product; S34, control the drive motor to start, the drive motor drives the drive gear to rotate, the drive gear drives the rack to move linearly to the left, the rack drives the second cylinder and the second side plate to move to the left, the second side plate drives the movable rod and the displacement sensor to move linearly to the left synchronously, when the displacement sensor is moving linearly to the left, if the displacement sensor sends an electrical signal to the controller, it means that the long round rod of the semi-qualified product being detected is not straight, the worker determines that the semi-qualified product corresponding to the displacement sensor is a defective product, the worker controls the rotating cylinder and the clamping cylinder corresponding to the defective product to close, the chuck no longer clamps the defective product, and the worker takes the defective product away from the support seat; If the displacement sensor still does not send an electrical signal to the controller when it moves to the left end of the long round rod of the semi-qualified product, it means that the long round rod of the semi-qualified product being tested is straight. The worker determines that the semi-qualified products being tested are all qualified products. The worker takes the qualified products away from the support seat, thus finally realizing the roundness and straightness testing of the four powder metallurgy rods; S4. The worker repeats the operations of steps S1 to S3 to detect the roundness and straightness of all powder metallurgy rods in the workshop.

[0018] The present invention has the following advantages: greatly reducing the work intensity of workers and greatly improving the detection efficiency of powder metallurgy rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the axonometric view of the powder metallurgy rod; Figure 2 for Figure 1 The main cross-sectional diagram of Figure 3 A schematic diagram of placing a long round rod of a powder metallurgy rod in a V-shaped groove of a V-shaped seat; Figure 4 A schematic diagram of supporting the detection rod of the circular runout meter on the circular head top surface of the powder metallurgy rod; Figure 5 A schematic diagram of supporting the detection rod of the circular runout meter on the top surface of the long round rod of a semi-qualified product; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 for Figure 6 The main cross-sectional diagram of Figure 8 Axonometric drawing of the support assembly; Fig. 9 for Figure 8 A partial cross-sectional view of Fig.10 It is a structural schematic diagram of the detection unit; Fig.11It is a schematic diagram of the connection between the rack and the guide rod; Fig.12 for Fig.11 The main view; Fig.13 An axonometric view of the drive assembly; Fig.14 for Fig.13 The main cross-sectional diagram of Fig.15 Schematic diagram for pre-installing powder metallurgy rods; Fig.16 It is a schematic diagram of the round head of the powder metallurgy rod abutting against the right end surface of the support seat; Fig.17 It is a schematic diagram of the chucks of four clamping cylinders being respectively sleeved on the left ends of the long round rods of four powder metallurgy rods; Fig.18 A schematic diagram of a chuck clamping and fixing the left end of a long round rod of a powder metallurgy rod; Fig.19 A schematic diagram of the separation of the push rod and the round head of the powder metallurgy rod; Fig. 20 It is a schematic diagram of the springs of four micro switches being pressed onto the outer cylindrical surfaces of the circular heads of four powder metallurgy rods respectively; Fig.21 for Fig. 20 A partial enlarged view of part A; Fig. 22 This is a schematic diagram of a worker taking a defective product off a support seat; Fig.23 A schematic diagram of a displacement sensor entering a detection station of a semi-qualified long round rod; Fig.24 A schematic diagram showing that the bottom end of the movable rod just touches the top surface of the right end of the long round rod of the semi-qualified product; Fig.25 for Fig.24 A partial enlarged view of part B; Fig.26 A schematic diagram of the displacement sensor moving to the left end of the long round rod of the semi-qualified product; In the figure: 1- round head, 2- long round rod, 3- V-shaped seat, 4- round runout meter, 5- detection rod; 6-working table, 7-driving assembly, 8-support assembly, 9-detection unit, 10-vertical plate, 11-support seat, 12-U-shaped groove; 13-stepping motor, 14-turntable, 15-first cylinder, 16-first side plate, 17-short connecting plate, 18-micro switch, 19-spring, 20-side push cylinder, 21-movable plate, 22-push rod, 23-driving motor, 24-guide seat, 25-driving gear, 26-guide rod, 27-rack, 28-second cylinder, 29-second side plate, 30-long connecting plate, 31-movable rod, 32-displacement sensor, 33-spring; 34-feed cylinder, 35-push plate, 36-rotation cylinder, 37-clamping cylinder, 38-chuck. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following: like Figure 6~Figure 14 As shown, a detection device for detecting the straightness and roundness of a powder metallurgy rod comprises a workbench 6, on the surface of which are arranged, from left to right, a driving assembly 7 for driving the powder metallurgy rod to rotate, a supporting assembly 8 for supporting the powder metallurgy rod, and a detection unit 9 for detecting the roundness of a round head 1 and the straightness of a long round rod 2 of the powder metallurgy rod; a plurality of support legs supported on the ground are fixedly arranged on the bottom surface of the workbench 6.

[0021] The support assembly 8 includes a vertical plate 10 fixedly mounted on the surface of the workbench 6, and a plurality of support seats 11 are fixedly mounted on the front end surface of the vertical plate 10 and along its height direction, and a U-shaped groove 12 is formed on the top surface of each support seat 11; the width of the U-shaped groove 12 of the support seat 11 is equal to the diameter of the long round rod 2 of the powder metallurgy rod; the vertical spacing between each two adjacent support seats 11 is equal.

[0022] The detection unit 9 includes a stepper motor 13 fixed on the workbench 6, a turntable 14 fixed on the output shaft of the stepper motor 13, a first cylinder 15 fixed on the left end of the turntable 14, a first side plate 16 fixed on the action end of the piston rod of the first cylinder 15, and a plurality of short connecting plates 17 fixed on the left end surface of the first side plate 16 and along its height direction, and the vertical spacing between each two adjacent short connecting plates 17 is equal, and the plurality of short connecting plates 17 are respectively connected to the left and right sides of each support seat 11. Oppositely, each short connecting plate 17 is fixed with a vertically arranged fixing rod, and a micro switch 18 is fixed at the bottom of each fixing rod, and the spring piece 19 of the micro switch 18 is arranged downward; a connecting frame is fixed on the right end surface of the upper end portion of the first side plate 16, and a side thrust cylinder 20 is fixed on the right end surface of the connecting frame, and the piston rod of the side thrust cylinder 20 passes through the connecting frame, and a movable plate 21 is fixed on the extending end, and a plurality of push rods 22 are fixed on the movable plate 21, which are respectively opposite to the left and right sides of the support seat 11.

[0023] A driving motor 23 and a guide seat 24 are fixedly provided on the right end portion of the turntable 14, a driving gear 25 is connected to the output shaft of the driving motor 23, a guide rod 26 is slidably installed in the guide seat 24, a rack 27 is fixedly provided on the left end portion of the guide rod 26, the rack 27 is meshed with the driving gear 25, a second cylinder 28 is fixedly provided on the top surface of the rack 27, a second side plate 29 is fixedly provided on the active end of the piston rod of the second cylinder 28, a plurality of long connecting plates 30 are fixedly provided on the right end surface of the second side plate 29 and along its height direction, the vertical spacing between each two adjacent long connecting plates 30 is equal, the long connecting plates 30 are respectively opposite to each supporting seat 11 on the left and right, a movable rod 31 is slidably penetrated in the right end portion of each long connecting plate 30, a floating plate is fixedly provided on the top of the movable rod 31, a displacement sensor 32 is fixedly provided on the top surface of the floating plate, a spring 33 is sleeved on the movable rod 31, and the upper and lower ends of the spring 33 are respectively fixed on the floating plate and the long connecting plate 30.

[0024] The driving assembly 7 includes a feed cylinder 34 fixedly mounted on the workbench 6, and a push plate 35 fixedly mounted on the action end of the piston rod of the feed cylinder 34. A plurality of rotating cylinders 36 are fixedly mounted on the left end surface of the push plate 35 and spaced apart along its height direction. The plurality of rotating cylinders 36 are respectively opposed to the left and right sides of each supporting seat 11. The rotating axis of the rotating cylinder 36 passes through the push plate 35, and a clamping cylinder 37 is fixedly mounted on the extending end, and the chuck 38 of the clamping cylinder 37 is arranged to face right.

[0025] The detection device also includes a controller, which is electrically connected to the first cylinder 15, the second cylinder 28, the feed cylinder 34, the clamping cylinder 37, the drive motor 23, the micro switch 18 and the displacement sensor 32 via a signal line. The worker can control the extension or retraction of the piston rods of the first cylinder 15, the second cylinder 28 and the feed cylinder 34 through the controller, and can also control the start or shut down of the clamping cylinder 37 and the drive motor 23. When the clamping cylinder 37 is closed, the chuck 38 is closed, and when the clamping cylinder 37 is started, the chuck 38 is opened, thereby facilitating the worker's operation.

[0026] A method for detecting the straightness and roundness of a powder metallurgy rod, comprising the following steps: S1, for four Figure 1~Figure 2 The specific steps for installing the powder metallurgy rod shown are as follows: S11. The worker takes out four powder metallurgy rods to be tested, and respectively places the long round rods 2 of the powder metallurgy rods into the U-shaped grooves 12 of the four support seats 11 of the support assembly 8, thereby realizing the pre-installation of the powder metallurgy rods. Fig.15 As shown; S12, the worker controls the piston rod of the side push cylinder 20 of the detection unit 9 to extend to the left, the piston rod drives the movable plate 21 to move to the left, the movable plate 21 drives the four push rods 22 thereon to move to the left, the push rods 22 push the round head 1 of the powder metallurgy rod to the left, when the piston rod of the side push cylinder 20 is fully extended, the round head 1 of the powder metallurgy rod just abuts against the right end surface of the support seat 11, as shown in FIG. Fig.16 As shown; S13, the piston rod of the feed cylinder 34 of the control drive assembly 7 extends to the right, the piston rod drives the push plate 35 to move to the right, and the push plate 35 drives the various rotating cylinders 36 and the clamping cylinders 37 thereon to move to the right synchronously. When the piston rod of the feed cylinder 34 is fully extended, the chucks 38 of the four clamping cylinders 37 are respectively sleeved on the outside of the left ends of the long round rods 2 of the four powder metallurgy rods, such as Fig.17 As shown; S14, control the clamping cylinder 37 to start, the clamping cylinder 37 drives the clamp 38 to close, and the clamp 38 clamps and fixes the left end of the long round rod 2 of the powder metallurgy rod. Fig.18 As shown; S15, control the piston rod of the side thrust cylinder 20 to retract to the right, the piston rod drives the movable plate 21 to move to the right, the movable plate 21 drives the four push rods 22 thereon to move to the right, and the push rods 22 are separated from the round head 1 of the powder metallurgy rod. Fig.19 As shown, the installation of the four powder metallurgy rods is finally realized. At this time, the round heads 1 of the four powder metallurgy rods are respectively located directly below the four micro switches 18; S2. Detect the roundness of the round heads 1 of the four powder metallurgy rods. The specific operation steps are as follows: S21, the piston rod of the first cylinder 15 of the control detection unit 9 is retracted downward, the piston rod drives the first side plate 16 to move downward, the first side plate 16 drives the short connecting plates 17 thereon to move downward, the short connecting plates 17 drive the fixing rod and the micro switch 18 to move downward synchronously, when the piston rod of the first cylinder 15 is fully retracted, the springs 19 of the four micro switches 18 are respectively pressed onto the outer cylindrical surfaces of the circular heads 1 of the four powder metallurgy rods, as shown in FIG. Figure 20~Figure 21 As shown, at this time, the micro switch 18 sends an electrical signal to the controller. After the controller receives the electrical signal from the micro switch 18, the worker clears the electrical signal on the controller; S22, the rotary cylinder 36 of the control driving assembly 7 is started, the rotary cylinder 36 drives the rotary shaft to rotate, the rotary shaft drives the clamping cylinder 37 to rotate, the clamping cylinder 37 drives the chuck 38 to rotate, the chuck 38 drives the long round rod 2 of the powder metallurgy rod to rotate, and the long round rod 2 drives the round head 1 to rotate relative to the stationary micro switch 18; During the rotation process, if the micro switch 18 sends an electrical signal to the controller again (because the non-circular round head 1 presses the spring 19 of the micro switch 18, the micro switch 18 sends an electrical signal to the controller), it means that the shape of the round head 1 of the powder metallurgy rod corresponding to the micro switch 18 is non-circular, and then the powder metallurgy rod is judged to be a defective product. At this time, the worker controls the rotating cylinder 36 and the clamping cylinder 37 corresponding to the defective product to be closed, and the clamp 38 no longer clamps the defective product, and then the worker takes the defective product away from the support seat 11. Fig. 22 As shown; During the rotation process, if the micro switch 18 does not send an electrical signal to the controller, it means that the shape of the round head 1 of the powder metallurgy rod corresponding to the micro switch 18 is round, and then the powder metallurgy rod is determined to be a semi-qualified product; It can be seen from step S2 that the worker only needs to check the roundness of the round head 1 of the powder metallurgy rod by the linkage cooperation of the first cylinder 15 and micro switch 18 of the detection unit 9 and the rotating cylinder 36 and clamping cylinder 37 of the driving assembly 7. Therefore, compared with the detection device Figure 4 The detection method shown does not require the worker to hold the circular runout meter 4 still with one hand while rotating the long round rod 2 of the powder metallurgy rod with the other hand to rotate the round head 1. This not only greatly reduces the work intensity of the workers, but also realizes the roundness detection of the round head 1 of the powder metallurgy rod in a short time, thereby greatly improving the detection efficiency of the powder metallurgy rod.

[0027] S3, the straightness of the semi-qualified long round rod 2 is tested, and the specific operation steps are as follows: S31, control the piston rod of the first cylinder 15 to extend upward, the piston rod drives the first side plate 16 to move upward, the first side plate 16 drives the short connecting plate 17 to move upward, the short connecting plate 17 drives the fixing rod and the micro switch 18 to move upward, and the micro switch 18 is separated from the semi-qualified round head 1; S32, the stepper motor 13 of the control detection unit 9 is started, the stepper motor 13 drives the turntable 14 to rotate, the turntable 14 drives the first cylinder 15, the drive motor 23 and the second cylinder 28 to rotate synchronously, the second cylinder 28 drives the second side plate 29 to rotate synchronously, the second side plate 29 drives the long connecting plate 30 to rotate, the long connecting plate 30 drives the movable rod 31 and the displacement sensor 32 to rotate synchronously, when the second cylinder 28 rotates 180°, the controller controls the stepper motor 13 to turn off, at this time, the displacement sensor 32 enters the detection station of the semi-qualified long round rod 2, such as Fig.23 As shown; S33, control the piston rod of the second cylinder 28 to retract downward, the piston rod drives the second side plate 29 to move downward, the second side plate 29 drives the long connecting plate 30 thereon to move downward, the long connecting plate 30 drives the movable rod 31 and the displacement sensor 32 to move downward synchronously, when the piston rod of the second cylinder 28 is fully retracted, the bottom end of the movable rod 31 just contacts the top surface of the right end of the long round rod 2 of the semi-qualified product, as shown in FIG. Figure 24-25 As shown; S34, control the drive motor 23 to start, the drive motor 23 drives the drive gear 25 to rotate, the drive gear 25 drives the rack 27 to make a linear motion to the left, the rack 27 drives the second cylinder 28 and the second side plate 29 to move to the left, the second side plate 29 drives the movable rod 31 and the displacement sensor 32 to make a linear motion to the left synchronously, when the displacement sensor 32 is in the process of linear motion to the left, if the displacement sensor 32 sends an electrical signal to the controller (because the non-straight long round rod 2 drives the movable rod 31 to move upward, the movable rod 31 drives the displacement sensor 32 to move upward, and the displacement sensor 32 sends an electrical signal to the controller), it means that the long round rod 2 of the semi-qualified product being detected is non-straight, the worker determines that the semi-qualified product corresponding to the displacement sensor 32 is a defective product, the worker controls the rotating cylinder 36 and the clamping cylinder 37 corresponding to the defective product to be closed, the chuck 38 no longer clamps the defective product, and the worker takes the defective product away from the support seat 11; If the displacement sensor 32 moves to the left end of the semi-qualified long round rod 2, Fig.26 As shown, the displacement sensor 32 still does not send an electrical signal to the controller, which means that the long round rod 2 of the semi-qualified product being tested is straight. The worker determines that the semi-qualified products being tested are all qualified products. The worker takes the qualified products away from the support seat 11, thereby finally realizing the roundness and straightness detection of the four powder metallurgy rods; Among them, it can be seen from step S3 that the worker only needs to check the straightness of the long round rod 2 of the powder metallurgy rod by the linkage cooperation of the second cylinder 28 and displacement sensor 32 of the detection unit 9 and the rotating cylinder 36 and clamping cylinder 37 of the driving assembly 7. Therefore, compared with the detection device Figure 5 The detection method shown does not require the worker to hold the circular runout table 4 still with one hand and push the V-shaped seat 3 with the other hand to detect the straightness of the long round rod 2 of the powder metallurgy rod. This not only greatly reduces the work intensity of the workers, but also realizes the straightness detection of the long round rod 2 of the powder metallurgy rod in a short time, thereby greatly improving the detection efficiency of the powder metallurgy rod.

[0028] S4. The worker repeats the operations of steps S1 to S3 to detect the roundness and straightness of all powder metallurgy rods in the workshop.

[0029] Among them, it can be seen from steps S1 to S4 that the detection device can detect the roundness and straightness of four powder metallurgy rods at one time through the linkage cooperation of the support component 8, the drive component 7 and the detection unit 9. Figure 3~Figure 5 The detection method shown does not require workers to detect powder metallurgy rods one by one, and can complete the detection of all powder metallurgy rods in the workshop in a short time, further greatly improving the detection efficiency of powder metallurgy rods.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection device for detecting the straightness and roundness of a powder metallurgy rod, characterized in that: It comprises a workbench (6), on the workbench (6) a driving assembly (7) for driving a powder metallurgy rod to rotate, a supporting assembly (8) for supporting the powder metallurgy rod, and a detection unit (9) for detecting the roundness of a round head (1) of the powder metallurgy rod and the straightness of a long round rod (2) are arranged in sequence from left to right. The support assembly (8) comprises a vertical plate (10) fixedly mounted on the surface of the workbench (6), a plurality of support seats (11) fixedly mounted at intervals on the front end surface of the vertical plate (10) and along its height direction, and a U-shaped groove (12) is formed on the top surface of each support seat (11); The detection unit (9) comprises a stepper motor (13) fixedly mounted on the surface of a workbench (6), a turntable (14) fixedly mounted on the output shaft of the stepper motor (13), a first cylinder (15) fixedly mounted on the left end of the turntable (14), a first side plate (16) fixedly mounted on the action end of the piston rod of the first cylinder (15), a plurality of short connecting plates (17) fixedly mounted on the left end surface of the first side plate (16) and along the height direction thereof, the plurality of short connecting plates (17) respectively being opposed to the left and right sides of each support seat (11), and each short connecting plate (17) being disposed on the left end surface of the first side plate (16). The plates (17) are each fixedly provided with a vertically arranged fixing rod, and a micro switch (18) is fixedly provided at the bottom of each fixing rod, and a spring piece (19) of the micro switch (18) is arranged downward; a connecting frame is fixedly provided on the right end surface of the upper end portion of the first side plate (16), and a side thrust cylinder (20) is fixedly provided on the right end surface of the connecting frame, and a piston rod of the side thrust cylinder (20) passes through the connecting frame, and a movable plate (21) is fixedly provided on the extended end, and a plurality of push rods (22) are fixedly provided on the movable plate (21) and are respectively opposite to the left and right sides of the support seat (11); A drive motor (23) and a guide seat (24) are fixedly provided on the right end of the turntable (14); a drive gear (25) is connected to the output shaft of the drive motor (23); a guide rod (26) is slidably mounted in the guide seat (24); a rack (27) is fixedly provided on the left end of the guide rod (26); the rack (27) is meshed with the drive gear (25); a second cylinder (28) is fixedly provided on the top surface of the rack (27); a second side plate (29) is fixedly provided on the action end of the piston rod of the second cylinder (28); A plurality of long connecting plates (30) are fixedly provided on the right end surfaces of the two side plates (29) and along the height direction thereof. The long connecting plates (30) are respectively opposed to the respective support seats (11) on the left and right. A movable rod (31) is slidably penetrated in the right end portion of each long connecting plate (30). A floating plate is fixedly provided on the top of the movable rod (31). A displacement sensor (32) is fixedly provided on the top surface of the floating plate. A spring (33) is sleeved on the movable rod (31). The upper and lower ends of the spring (33) are respectively fixedly provided on the floating plate and the long connecting plate (30).

2. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 1, characterized in that: A plurality of support legs supported on the ground are fixedly arranged on the bottom surface of the workbench (6).

3. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 2, characterized in that: The width of the U-shaped groove (12) of the support seat (11) is equal to the diameter of the long round rod (2) of the powder metallurgy rod.

4. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 3, characterized in that: The vertical spacing between every two adjacent support seats (11) is equal.

5. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 4, characterized in that: The vertical spacing between every two adjacent short connecting plates (17) is equal, and the vertical spacing between every two adjacent long connecting plates (30) is equal.

6. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 5, characterized in that: The driving assembly (7) comprises a feed cylinder (34) fixedly mounted on the workbench (6), and a push plate (35) fixedly mounted on the action end of the piston rod of the feed cylinder (34). A plurality of rotary cylinders (36) are fixedly mounted on the left end surface of the push plate (35) and spaced apart along its height direction. The plurality of rotary cylinders (36) are respectively opposed to the left and right sides of each support seat (11). The rotary axis of the rotary cylinder (36) passes through the push plate (35), and a clamping cylinder (37) is fixedly mounted on the extension end. The clamping head (38) of the clamping cylinder (37) is arranged to face right.

7. The detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 6, characterized in that: The detection device also includes a controller, which is electrically connected to the first cylinder (15), the second cylinder (28), the feed cylinder (34), the clamping cylinder (37), the drive motor (23), the micro switch (18), and the displacement sensor (32) via signal lines.

8. A method for detecting the straightness and roundness of a powder metallurgy rod, using the detection device for detecting the straightness and roundness of a powder metallurgy rod according to claim 7, characterized in that: It includes the following steps: S1. The specific steps for installing four powder metallurgy rods are as follows: S11, the worker takes out four powder metallurgy rods to be tested, and respectively places the long round rods (2) of the powder metallurgy rods into the U-shaped grooves (12) of the four support seats (11) of the support assembly (8), thereby achieving pre-installation of the powder metallurgy rods; S12, the worker controls the piston rod of the side push cylinder (20) of the detection unit (9) to extend to the left, the piston rod drives the movable plate (21) to move to the left, the movable plate (21) drives the four push rods (22) thereon to move to the left, the push rods (22) push the round head (1) of the powder metallurgy rod to the left, and when the piston rod of the side push cylinder (20) is fully extended, the round head (1) of the powder metallurgy rod just abuts against the right end surface of the support seat (11); S13, the piston rod of the feed cylinder (34) of the control drive assembly (7) extends to the right, the piston rod drives the push plate (35) to move to the right, the push plate (35) drives the respective rotary cylinders (36) and clamping cylinders (37) thereon to move to the right synchronously, and when the piston rod of the feed cylinder (34) is fully extended, the chucks (38) of the four clamping cylinders (37) are respectively sleeved on the outside of the left ends of the long round rods (2) of the four powder metallurgy rods; S14, controlling the clamping cylinder (37) to start, the clamping cylinder (37) drives the clamping head (38) to close, and the clamping head (38) clamps and fixes the left end of the long round rod (2) of the powder metallurgy rod; S15, the piston rod of the side thrust cylinder (20) is controlled to retract to the right, the piston rod drives the movable plate (21) to move to the right, the movable plate (21) drives the four push rods (22) thereon to move to the right, the push rods (22) are separated from the round heads (1) of the powder metallurgy rods, thereby finally achieving the installation of the four powder metallurgy rods. At this time, the round heads (1) of the four powder metallurgy rods are respectively located directly below the four micro switches (18); S2. Detect the roundness of the round heads (1) of the four powder metallurgy rods. The specific operation steps are as follows: S21, the piston rod of the first cylinder (15) of the control detection unit (9) is retracted downward, the piston rod drives the first side plate (16) to move downward, the first side plate (16) drives the short connecting plates (17) thereon to move downward, the short connecting plates (17) drive the fixing rod and the micro switch (18) to move downward synchronously, when the piston rod of the first cylinder (15) is completely retracted, the springs (19) of the four micro switches (18) are respectively pressed onto the outer cylindrical surfaces of the circular heads (1) of the four powder metallurgy rods, at which time the micro switch (18) sends an electrical signal to the controller, after the controller receives the electrical signal from the micro switch (18), the worker clears the electrical signal on the controller; S22, the rotary cylinder (36) of the control driving assembly (7) is started, the rotary cylinder (36) drives the rotary shaft to rotate, the rotary shaft drives the clamping cylinder (37) to rotate, the clamping cylinder (37) drives the chuck (38) to rotate, the chuck (38) drives the long round rod (2) of the powder metallurgy rod to rotate, and the long round rod (2) drives the round head (1) to rotate relative to the stationary micro switch (18); During the rotation process, if a micro switch (18) sends an electrical signal to the controller again, it means that the shape of the round head (1) of the powder metallurgy rod corresponding to the micro switch (18) is non-circular, and the powder metallurgy rod is determined to be a defective product. At this time, the worker controls the rotating cylinder (36) and the clamping cylinder (37) corresponding to the defective product to be closed, and the clamping head (38) no longer clamps the defective product, and then the worker removes the defective product from the support seat (11); During the rotation process, if the micro switch (18) does not send an electrical signal to the controller, it means that the shape of the round head (1) of the powder metallurgy rod corresponding to the micro switch (18) is round, and the powder metallurgy rod is determined to be a semi-qualified product; S3. Testing the straightness of the semi-qualified long round rod (2). The specific operation steps are as follows: S31, controlling the piston rod of the first cylinder (15) to extend upward, the piston rod drives the first side plate (16) to move upward, the first side plate (16) drives the short connecting plate (17) to move upward, the short connecting plate (17) drives the fixing rod and the micro switch (18) to move upward, and the micro switch (18) is separated from the circular head (1) of the semi-qualified product; S32, the stepper motor (13) of the control detection unit (9) is started, the stepper motor (13) drives the turntable (14) to rotate, the turntable (14) drives the first cylinder (15), the drive motor (23) and the second cylinder (28) to rotate synchronously, the second cylinder (28) drives the second side plate (29) to rotate synchronously, the second side plate (29) drives the long connecting plate (30) to rotate, the long connecting plate (30) drives the movable rod (31) and the displacement sensor (32) to rotate synchronously, when the second cylinder (28) rotates 180°, the controller controls the stepper motor (13) to turn off, at which time, the displacement sensor (32) enters the detection station of the semi-qualified long round rod (2); S33, control the piston rod of the second cylinder (28) to retract downward, the piston rod drives the second side plate (29) to move downward, the second side plate (29) drives the long connecting plate (30) thereon to move downward, the long connecting plate (30) drives the movable rod (31) and the displacement sensor (32) to move downward synchronously, and when the piston rod of the second cylinder (28) is completely retracted, the bottom end of the movable rod (31) just contacts the top surface of the right end of the long round rod (2) of the semi-qualified product; S34, controlling the drive motor (23) to start, the drive motor (23) drives the drive gear (25) to rotate, the drive gear (25) drives the rack (27) to move linearly to the left, the rack (27) drives the second cylinder (28) and the second side plate (29) to move to the left, the second side plate (29) drives the movable rod (31) and the displacement sensor (32) to move linearly to the left synchronously, when the displacement sensor (32) is in the process of moving linearly to the left, if the displacement sensor (32) sends an electrical signal to the controller, it means that the long round rod (2) of the semi-qualified product being tested is not straight, the worker determines that the semi-qualified product corresponding to the displacement sensor (32) is a defective product, the worker controls the rotating cylinder (36) and the clamping cylinder (37) corresponding to the defective product to be closed, the clamp (38) no longer clamps the defective product, and the worker removes the defective product from the support seat (11); If the displacement sensor (32) still does not send an electrical signal to the controller when the displacement sensor (32) moves to the left end of the long round rod (2) of the semi-qualified product, it means that the long round rod (2) of the semi-qualified product being tested is straight, and the worker determines that the semi-qualified products being tested are all qualified products. The worker removes the qualified products from the support seat (11), thereby finally realizing the roundness and straightness test of the four powder metallurgy rods; S4. The worker repeats the operations of steps S1 to S3 to detect the roundness and straightness of all powder metallurgy rods in the workshop.

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