An opening detection device and method for a powder metallurgy disc with multiple openings

Abstract

The present invention discloses an opening detection device and method for a powder metallurgy disk with multiple openings. The present invention relates to the technical field of detecting the opening of a powder metallurgy disk. The device comprises a workbench, an arch frame is fixedly provided on the workbench, and a detection unit for detecting the depth and width of the opening in the powder metallurgy disk is arranged on the arch frame. The workbench is also provided with a positioning and ejection mechanism for positioning and ejecting the powder metallurgy disk; a lateral micro switch is fixedly provided on the inner side wall of the lower end of the two rods, and rollers are rotatably installed on the upper ends of the two rods through the pin shaft; a vertical micro switch is fixedly provided on the bottom surface of the two floating rods; an arc-shaped protrusion is fixedly provided on the bottom surface of the two lifting plates, and under the elastic force of the spring, the two arc-shaped protrusions respectively abut against the top surfaces of the two rollers. The beneficial effects of the present invention are: the work intensity of the workers is greatly reduced, and the opening detection efficiency of the powder metallurgy disk is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of opening detection of a powder metallurgy tray, in particular to an opening detection device and method for a powder metallurgy tray with multiple openings. Background Art

[0002] The structure of a powder metallurgy plate 1 with multiple openings is as follows Figure 1~Figure 3 As shown, a central hole 2 is provided in the middle of the powder metallurgy plate 1, and a keyway 3 is provided on the inner wall of the central hole 2 to communicate with the central hole 2. Four openings 4 are evenly provided on the outer edge of the top surface of the powder metallurgy plate 1, and the four openings 4 all penetrate the outer cylindrical surface of the powder metallurgy plate 1. The processing technology of the powder metallurgy plate 1 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 3 The powder metallurgy disc body 1 is shown.

[0003] After a batch of powder metallurgy discs 1 are produced in the workshop, the process requires that the four openings 4 in each powder metallurgy disc 1 be inspected, that is, the depth H and width L of the openings 4 are inspected (due to the manufacturing process, the depth and width of some openings 4 may be too small and do not meet the design requirements, so the four openings 4 are required to be inspected).

[0004] The method for detecting the four openings 4 of the powder metallurgy plate 1 in a workshop is:

[0005] S1. A worker takes out a powder metallurgy disc 1 to be tested and places it flat on the surface of a testing table;

[0006] S2. The worker uses a vernier caliper to measure the depth of the first opening 4 of the powder metallurgy plate 1, and then uses a vernier caliper to measure the width of the first opening 4; after the measurement, the worker records the measured depth and width;

[0007] S3, the worker repeats step S2 three times to measure the depth and width of the other three openings 4 of the powder metallurgy plate 1;

[0008] S4, the worker compares the measured depths of the four openings 4 with the standard depths respectively. If one of the depths is less than the standard depth, the worker determines that the powder metallurgy plate 1 is a defective product;

[0009] If the depths of the four openings 4 are all greater than the standard depth, the powder metallurgy plate 1 is determined to be a semi-qualified product; then the worker compares the widths of the four openings 4 of the semi-qualified product with the standard width respectively. If one width is smaller than the standard width, the semi-qualified product is determined to be an unqualified product; if the widths of the four openings 4 are all greater than the standard width, the semi-qualified product is determined to be a qualified product, thereby finally completing the inspection of the four openings 4 of a powder metallurgy plate 1;

[0010] S5. The worker repeats the operations of steps S1 to S4 for multiple times, and the openings of all the powder metallurgy plates 1 in the workshop can be inspected.

[0011] However, although the method used in the workshop can detect the four openings 4 of the powder metallurgy plate 1, it still has the following technical defects:

[0012] I. It can be seen from steps S1 to S2 that, since there are four openings 4 in a powder metallurgy plate 1, eight processes are required to measure the depth and width of the four openings 4, which undoubtedly increases the work intensity of the workers; in addition, since there are many processes, it takes a long time to complete the measurement of all the four openings 4 of a powder metallurgy plate 1, and the number of powder metallurgy plates 1 to be inspected every day is as high as 100 to 120, which undoubtedly reduces the opening inspection efficiency of the powder metallurgy plate.

[0013] II. In step S4, when the depths and widths of the four openings 4 of a powder metallurgy disk 1 are measured, it is necessary to manually compare the depths of the four openings 4 with the standard depths, or to manually compare the widths of the four openings 4 with the standard widths, in order to determine whether a qualified product is a failed product; and the entire comparison process needs to be completed manually, which not only increases the workload of the workers, but also reduces the efficiency of the opening detection of the powder metallurgy disk.

[0014] 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 plate opening detection. Summary of the invention

[0015] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an opening detection device and method for a powder metallurgy tray with multiple openings, which greatly reduces the work intensity of workers and greatly improves the opening detection efficiency of the powder metallurgy tray.

[0016] The object of the present invention is achieved by the following technical solutions: an opening detection device with a powder metallurgy tray with multiple openings, comprising a workbench, an arch frame is fixedly arranged on the workbench, a detection unit for detecting the depth and width of the openings in the powder metallurgy tray is arranged on the arch frame, and a positioning and ejection mechanism for positioning and ejecting the powder metallurgy tray is also arranged on the workbench, and the positioning and ejection mechanism is arranged directly below the detection unit;

[0017] The detection unit includes a lifting cylinder fixed on the top surface of the arch frame, the piston rod of the lifting cylinder passes through the arch frame downward, and a connecting plate is fixed on the extended end, a horizontally arranged double-acting cylinder is fixed on the bottom surface of the connecting plate, rods are welded on the two piston rods of the double-acting cylinder, lateral micro switches are fixed on the inner side walls of the lower ends of the two rods, the springs A of the lateral micro switches are arranged inward, and rollers are rotatably installed on the upper ends of the two rods via pin shafts;

[0018] Guide rods are fixedly provided on the top surface of the connecting plate and at its left and right ends, lifting plates are slidably sleeved on the two guide rods, springs are sleeved on the two guide rods, and the upper and lower ends of the springs are respectively fixed on the lifting plates and the connecting plate; the two lifting plates extend to the outside of the rod members, and floating rods are fixed on the extended ends, vertical micro switches are fixed on the bottom surfaces of the two floating rods, and the spring pieces B of the vertical micro switches are arranged downward; arc-shaped protrusions are fixed on the bottom surfaces of the two lifting plates, and under the elastic force of the springs, the two arc-shaped protrusions respectively abut against the top surfaces of the two rollers.

[0019] A plurality of pads supported on the ground are fixedly arranged on the bottom surface of the workbench.

[0020] The positioning and ejection mechanism comprises a frame fixed on the workbench surface, a stepper motor fixed on the top surface of the frame, and a turntable fixed on the output shaft of the stepper motor; a positioning column is fixed on the top surface of the turntable, a flat key is fixed on the cylindrical surface of the positioning column along its axial direction, and four through holes are evenly opened in the turntable along the circumferential direction of the positioning column;

[0021] A lifting cylinder is fixedly provided on the bottom surface of the frame, the piston rod of the lifting cylinder extends into the frame, and a lifting plate is fixedly provided on the extended end, and two lifting rods are fixedly provided on the top surface of the lifting plate, both of which penetrate upward through the top edge of the frame, and the two lifting rods are respectively located directly below two of the through holes in the turntable.

[0022] The outer diameter of the positioning column matches the central hole of the powder metallurgy disc body, and the flat key matches the keyway of the powder metallurgy disc body.

[0023] A connecting frame is fixedly arranged between the bottom surface of the frame and the workbench.

[0024] The lifting cylinder, positioning column, turntable and stepping motor are coaxially arranged.

[0025] The two lateral micro switches are symmetrically arranged with respect to the double-acting cylinder, and the two vertical micro switches are symmetrically arranged with respect to the double-acting cylinder.

[0026] The detection device also includes a controller, which is electrically connected to the lifting cylinder, the double-acting cylinder, the jacking cylinder, the stepping motor, the lateral micro switch and the vertical micro switch via a signal line.

[0027] A method for detecting openings of a powder metallurgy disk with multiple openings, comprising the following steps:

[0028] S1. Positioning of the powder metallurgy disc to be tested: The worker takes out a powder metallurgy disc to be tested, and puts the center hole of the powder metallurgy disc on the positioning column of the positioning and ejection mechanism from top to bottom. At the same time, puts the keyway of the powder metallurgy disc on the flat key of the positioning and ejection mechanism from top to bottom; then the powder metallurgy disc is supported on the top surface of the turntable, thereby realizing the positioning of the powder metallurgy disc. At this time, the left opening of the powder metallurgy disc is directly below the lateral microswitch and the vertical microswitch on the left, and the right opening of the powder metallurgy disc is directly below the lateral microswitch and the vertical microswitch on the right;

[0029] S2. Detect the two openings in the powder metallurgy plate. The specific operation steps are as follows:

[0030] S21. The piston rod of the lifting cylinder of the control detection unit extends downward, and the piston rod drives the connecting plate to move downward. The connecting plate drives the double-acting cylinder, two guide rods, two floating rods, two lateral micro switches and two vertical micro switches to move downward synchronously. When the piston rod of the lifting cylinder is fully extended, the lateral micro switch and the vertical micro switch on the left side both enter the left opening of the powder metallurgy disk body, and at the same time, the lateral micro switch and the vertical micro switch on the right side both enter the right opening of the powder metallurgy disk body.

[0031] S22, the two piston rods of the double-acting cylinder of the control detection unit are retracted inward at the same time, and the two piston rods respectively drive the two rods to move inward, and the rods drive the lateral microswitch and the roller to move inward synchronously, and the spring A of the lateral microswitch moves toward the side wall of the opening; at the same time, the roller gradually staggers with the arc-shaped protrusion on the lifting plate, and in the process of gradual staggering, the lifting plate moves downward along the guide rod, the lifting plate drives the floating rod to move downward, the floating rod drives the vertical microswitch to move downward, and the spring B of the vertical microswitch moves toward the bottom wall of the opening;

[0032] When the two piston rods of the double-acting cylinder are fully retracted, the rod no longer drives the lateral micro switch to move inward, and at the same time, the roller is just offset from the arc-shaped protrusion on the lifting plate;

[0033] If the controller receives an electrical signal from the lateral microswitch or the vertical microswitch, it means that the width or depth of the detected opening does not meet the design requirements, and the worker determines that the powder metallurgy plate is a defective product. At this time, the worker takes out the defective products in the following steps: the worker first controls the piston rod of the lifting cylinder to retract upward to reset the lateral microswitch and the vertical microswitch upward, and then controls the piston rod of the jacking cylinder to extend upward, the piston rod drives the jacking plate to move upward, and the jacking plate drives the two jacking rods to move upward, the jacking rods pass through the through hole and lift the defective products upward along the positioning column, and when the defective products are lifted to the outside of the positioning column, the worker takes the defective products away;

[0034] If the controller does not receive the electrical signal from the lateral micro switch and the vertical micro switch, it means that the width or depth of the detected opening meets the design requirements. The worker determines that the powder metallurgy plate is a semi-qualified product, thus finally completing the inspection of the two openings in the powder metallurgy plate.

[0035] S3. Detect the two openings in the semi-qualified product. The specific operation steps are as follows:

[0036] S31. The worker controls the two piston rods of the double-acting cylinder to extend outward, so that the two piston rods respectively drive the two rods to move outward, and the arc-shaped protrusion on the lifting plate rests against the top of the roller again;

[0037] S32, the piston rod of the control lifting cylinder is retracted upward, the piston rod drives the connecting plate to move upward, and the connecting plate drives the double-acting cylinder, two guide rods, two floating rods, two lateral micro switches and two vertical micro switches to move upward synchronously, so that the lateral micro switches and the vertical micro switches are reset;

[0038] S33, control the stepper motor to start, the stepper motor drives the turntable to rotate, the turntable drives the positioning column and the flat key to rotate, the positioning column and the flat key drive the semi-qualified product to rotate synchronously, when the semi-qualified product rotates 90°, the controller controls the stepper motor to close, at this time, the other two openings in the semi-qualified product enter the inspection station, the lateral micro switch and the vertical micro switch on the left side enter the left opening of the semi-qualified product, and at the same time, the lateral micro switch and the vertical micro switch on the right side enter the right opening of the semi-qualified product;

[0039] S34, the worker repeats the operation of steps S21-S22 once. If the controller receives the electrical signal from the lateral microswitch or the vertical microswitch, it means that the width or depth of the detected opening does not meet the design requirements. The worker determines that the semi-qualified product is a defective product. At this time, the worker takes out the defective product in the following steps: the worker first controls the piston rod of the lifting cylinder to retract upward to reset the lateral microswitch and the vertical microswitch upward, and then controls the piston rod of the lifting cylinder to extend upward. When the defective product is pushed to the outside of the positioning column, the worker takes the defective product away.

[0040] If the controller does not receive the electrical signal from the lateral micro switch and the vertical micro switch, it means that the width or depth of the detected opening meets the design requirements. The worker determines that the semi-qualified product is a qualified product. The worker controls the piston rod of the lifting cylinder to extend upward. When the qualified product is lifted up, the worker takes the qualified product away, thereby completing the detection of the two openings in the semi-qualified product, and finally completing the detection of the four openings in a powder metallurgy plate body;

[0041] S4. The worker repeats steps S1 to S3 for multiple times to inspect the openings of all powder metallurgy plates in the workshop.

[0042] The present invention has the following advantages: the working intensity of workers is greatly reduced, and the opening detection efficiency of the powder metallurgy disc is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an axonometric view of the powder metallurgy disc;

[0044] Figure 2 for Figure 1 A top view of

[0045] Figure 3 for Figure 2 AA section view;

[0046] Figure 4 It is a structural schematic diagram of the present invention;

[0047] Figure 5 for Figure 4 The main cross-sectional diagram of

[0048] Figure 6 It is a structural schematic diagram of the detection unit;

[0049] Figure 7 It is a connection diagram of the rod, roller and lateral micro switch;

[0050] Figure 8 for Figure 7 The main cross-sectional diagram of

[0051] Fig. 9 It is a connection diagram of the floating rod, lifting plate and vertical micro switch;

[0052] Fig.10 It is a schematic diagram of the connection between the lifting plate and the arc-shaped protrusion;

[0053] Fig.11 for Fig.10 The main cross-sectional diagram of

[0054] Fig.12 It is the axonometric drawing of the positioning and ejection mechanism;

[0055] Fig.13 for Fig.12 The main cross-sectional diagram of

[0056] Fig.14 A schematic diagram for realizing the positioning of the powder metallurgy disc;

[0057] Fig.15 It is a schematic diagram of the piston rod of the lifting cylinder after it is fully extended;

[0058] Fig.16 for Fig.15 A partial enlarged view of part B;

[0059] Fig.17 It is a schematic diagram of a double-acting cylinder after both piston rods are fully retracted;

[0060] Fig.18 for Fig.17 A partial enlarged view of the C part;

[0061] Fig.19 The schematic diagram is that the defective products are lifted to the outside of the positioning column;

[0062] Fig. 20 Schematic diagram of the rotational motion of a semi-conforming product;

[0063] In the figure:

[0064] 1-powder metallurgy disc, 2-center hole, 3-keyway, 4-opening;

[0065] 5-working table, 6-arch frame, 7-detection unit, 8-positioning and ejection mechanism;

[0066] 9-lifting cylinder, 10-connecting plate, 11-double-acting cylinder, 12-rod, 13-lateral micro switch, 14-spring A, 15-roller, 16-guide rod, 17-lifting plate, 18-spring, 19-floating rod, 20-vertical micro switch, 21-spring B, 22-arc-shaped protrusion;

[0067] 23-frame, 24-stepping motor, 25-turntable, 26-positioning column, 27-flat key, 28-through hole, 29-lifting cylinder, 30-lifting plate, 31-lifting rod, 32-connecting frame. DETAILED DESCRIPTION

[0068] 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:

[0069] like Figure 4~Figure 13 As shown, an opening detection device with a powder metallurgy disc with multiple openings comprises a workbench 5, on which an arch frame 6 is fixedly provided, on which a detection unit 7 for detecting the depth and width of an opening 4 in a powder metallurgy disc 1 is arranged, and the workbench 5 is also provided with a positioning and ejection mechanism 8 for positioning and ejecting the powder metallurgy disc 1, and the positioning and ejection mechanism 8 is arranged directly below the detection unit 7; a plurality of pads supported on the ground are fixedly provided on the bottom surface of the workbench 5.

[0070] The detection unit 7 includes a lifting cylinder 9 fixed on the top surface of the arch frame 6, the piston rod of the lifting cylinder 9 penetrates the arch frame 6 downward, and a connecting plate 10 is fixed on the extending end, a horizontally arranged double-acting cylinder 11 is fixed on the bottom surface of the connecting plate 10, and rods 12 are welded on the two piston rods of the double-acting cylinder 11, and lateral micro switches 13 are fixed on the inner side walls of the lower ends of the two rods 12. The two lateral micro switches 13 are symmetrically arranged about the double-acting cylinder 11, and the spring A14 of the lateral micro switch 13 is arranged inwardly, and rollers 15 are rotatably installed on the upper ends of the two rods 12 through the pins.

[0071] Guide rods 16 are fixedly provided on the top surface of the connecting plate 10 and at its left and right ends, and lifting plates 17 are slidably sleeved on the two guide rods 16, and springs 18 are sleeved on the two guide rods 16, and the upper and lower ends of the spring 18 are respectively fixed on the lifting plates 17 and the connecting plate 10; the two lifting plates 17 extend to the outside of the rod 12, and floating rods 19 are fixed on the extended ends, and vertical micro switches 20 are fixed on the bottom surfaces of the two floating rods 19, and the two vertical micro switches 20 are symmetrically arranged about the double-acting cylinder 11, and the springs B21 of the vertical micro switches 20 are arranged downward; arc-shaped protrusions 22 are fixed on the bottom surfaces of the two lifting plates 17, and under the elastic force of the spring 18, the two arc-shaped protrusions 22 respectively abut against the top surfaces of the two rollers 15.

[0072] The positioning and ejection mechanism 8 includes a frame 23 fixed on the workbench 5, a stepper motor 24 fixed on the top surface of the frame 23, and a turntable 25 fixed on the output shaft of the stepper motor 24; a positioning column 26 is fixed on the top surface of the turntable 25, and a flat key 27 is fixed on the cylindrical surface of the positioning column 26 along its axial direction, and four through holes 28 are evenly opened in the turntable 25 along the circumferential direction of the positioning column 26; the lifting cylinder 9, the positioning column 26, the turntable 25 and the stepper motor 24 are coaxially arranged. The outer diameter of the positioning column 26 matches the central hole 2 of the powder metallurgy plate body 1, and the flat key 27 matches the keyway 3 of the powder metallurgy plate body 1.

[0073] A lifting cylinder 29 is fixedly arranged on the bottom surface of the frame 23, and a piston rod of the lifting cylinder 29 extends into the frame 23, and a lifting plate 30 is fixedly arranged on the extended end, and two lifting rods 31 are fixedly arranged on the top surface of the lifting plate 30, and both of the two lifting rods 31 pass through the top edge of the frame 23 upward, and the two lifting rods 31 are respectively located directly below two through holes 28 in the turntable 25. A connecting frame 32 is fixedly arranged between the bottom surface of the frame 23 and the workbench 5.

[0074] The detection device also includes a controller, which is electrically connected to the lifting cylinder 9, the double-acting cylinder 11, the lifting cylinder 29, the stepper motor 24, the lateral microswitch 13 and the vertical microswitch 20 via a signal line. Workers can control the extension or retraction of the piston rods of the lifting cylinder 9 and the lifting cylinder 29 through the controller, and can also control the two piston rods of the double-acting cylinder 11 to extend or retract at the same time. At the same time, it can also control the stepper motor 24 to start or shut down, which facilitates the workers' operation and has the characteristics of a high degree of automation.

[0075] A method for detecting openings of a powder metallurgy disk with multiple openings, comprising the following steps:

[0076] S1. Positioning of the powder metallurgy plate 1 to be tested: The worker takes out a Figure 1~Figure 3 As shown in the figure, the center hole 2 of the powder metallurgy plate 1 to be tested is placed on the positioning column 26 of the positioning and ejection mechanism 8 from top to bottom, and at the same time, the key slot 3 of the powder metallurgy plate 1 is placed on the flat key 27 of the positioning and ejection mechanism 8 from top to bottom; then the powder metallurgy plate 1 is supported on the top surface of the turntable 25, thereby realizing the positioning of the powder metallurgy plate 1, as shown in FIG. Fig.14 As shown, at this time, the left opening 4 of the powder metallurgy tray body 1 is directly below the lateral micro switch 13 and the vertical micro switch 20 on the left, and the right opening 4 of the powder metallurgy tray body 1 is directly below the lateral micro switch 13 and the vertical micro switch 20 on the right;

[0077] S2. Detect the two openings 4 in the powder metallurgy plate 1. The specific operation steps are as follows:

[0078] S21, the piston rod of the lifting cylinder 9 of the control detection unit 7 extends downward, the piston rod drives the connecting plate 10 to move downward, the connecting plate 10 drives the double-acting cylinder 11, two guide rods 16, two floating rods 19, two lateral micro switches 13 and two vertical micro switches 20 to move downward synchronously, when the piston rod of the lifting cylinder 9 is fully extended, as shown in FIG. Figure 15-16 As shown, the lateral micro switch 13 and the vertical micro switch 20 located on the left side are both inserted into the left opening 4 of the powder metallurgy plate body 1, and at the same time, the lateral micro switch 13 and the vertical micro switch 20 located on the right side are both inserted into the right opening 4 of the powder metallurgy plate body 1;

[0079] S22, the two piston rods of the double-acting cylinder 11 of the control detection unit 7 are simultaneously retracted inward, and the two piston rods respectively drive the two rods 12 to move inward, and the rod 12 drives the lateral micro switch 13 and the roller 15 to move inward synchronously, and the spring A14 of the lateral micro switch 13 moves toward the side wall direction of the opening 4; at the same time, the roller 15 gradually staggers with the arc-shaped protrusion 22 on the lifting plate 17, and in the process of gradual staggering, the lifting plate 17 moves downward along the guide rod 16, and the lifting plate 17 drives the floating rod 19 to move downward, and the floating rod 19 drives the vertical micro switch 20 to move downward, and the spring B21 of the vertical micro switch 20 moves toward the bottom wall direction of the opening 4;

[0080] When both piston rods of the double-acting cylinder 11 are fully retracted, Figure 17-18 As shown, the rod 12 no longer drives the lateral micro switch 13 to move inward, and at the same time, the roller 15 is just offset from the arc-shaped protrusion 22 on the lifting plate 17;

[0081] If the controller receives an electrical signal from the lateral microswitch 13 or the vertical microswitch 20 (the spring A14 of the lateral microswitch 13 presses the side wall of the opening 4, and the lateral microswitch 13 sends an electrical signal to the controller; the spring B21 of the vertical microswitch 20 presses the bottom wall of the opening 4, and the vertical microswitch 20 sends an electrical signal to the controller), it means that the width or depth of the detected opening 4 does not meet the design requirements, and the worker determines that the powder metallurgy disk 1 is unqualified. At this time, the worker takes out the defective products in the following steps: the worker first controls the piston rod of the lifting cylinder 9 to retract upwards, so that the lateral microswitch 13 and the vertical microswitch 20 are reset upwards, and then controls the piston rod of the lifting cylinder 29 to extend upwards, and the piston rod drives the lifting plate 30 to move upwards, and the lifting plate 30 drives the two lifting rods 31 to move upwards, and the lifting rods 31 pass through the through hole 28 and lift the defective products upwards along the positioning column 26. When the defective products are lifted to the outside of the positioning column 26, as shown in FIG. Fig.19 As shown, workers take away defective products in the following direction: Fig.19As indicated by the arrow;

[0082] If the controller does not receive the electrical signals from the lateral microswitch 13 and the vertical microswitch 20 (the spring A14 of the lateral microswitch 13 does not press the side wall of the opening 4, and the lateral microswitch 13 does not send an electrical signal to the controller; the spring B21 of the vertical microswitch 20 does not press the bottom wall of the opening 4, and the vertical microswitch 20 does not send an electrical signal to the controller), it means that the width or depth of the detected opening 4 meets the design requirements, and the worker determines that the powder metallurgy plate 1 is a semi-qualified product, thereby finally completing the detection of the two openings 4 in the powder metallurgy plate 1;

[0083] S3, inspect the two openings 4 in the semi-qualified product, and the specific operation steps are as follows:

[0084] S31, the worker controls the two piston rods of the double-acting cylinder 11 to extend outward, so that the two piston rods respectively drive the two rods 12 to move outward, and the arc-shaped protrusion 22 on the lifting plate 17 abuts against the top of the roller 15 again;

[0085] S32, the piston rod of the control lifting cylinder 9 is retracted upward, the piston rod drives the connecting plate 10 to move upward, and the connecting plate 10 drives the double-acting cylinder 11, two guide rods 16, two floating rods 19, two lateral micro switches 13 and two vertical micro switches 20 to move upward synchronously, so that the lateral micro switches 13 and the vertical micro switches 20 are reset;

[0086] S33, control the stepper motor 24 to start, the stepper motor 24 drives the turntable 25 to rotate, the turntable 25 drives the positioning column 26 and the flat key 27 to rotate, the positioning column 26 and the flat key 27 drive the semi-qualified product to rotate synchronously, and the rotation direction of the semi-qualified product is as follows: Fig. 20 As shown by the middle arrow, when the semi-qualified product rotates 90°, the controller controls the stepper motor 24 to turn off. At this time, the other two openings 4 in the semi-qualified product enter the detection station, and the lateral microswitch 13 and the vertical microswitch 20 on the left enter the left opening 4 of the semi-qualified product. At the same time, the lateral microswitch 13 and the vertical microswitch 20 on the right enter the right opening 4 of the semi-qualified product.

[0087] S34, the worker repeats the operation of steps S21-S22 once. If the controller receives the electrical signal from the lateral microswitch 13 or the vertical microswitch 20, it means that the width or depth of the detected opening 4 does not meet the design requirements. The worker determines that the semi-qualified product is a defective product. At this time, the worker takes out the defective product in the following steps: the worker first controls the piston rod of the lifting cylinder 9 to retract upwards, so that the lateral microswitch 13 and the vertical microswitch 20 are reset upwards, and then controls the piston rod of the lifting cylinder 29 to extend upwards. When the defective product is pushed to the outside of the positioning column 26, the worker takes the defective product away;

[0088] If the controller does not receive the electrical signal from the lateral micro switch 13 and the vertical micro switch 20, it means that the width or depth of the detected opening 4 meets the design requirements, and the worker determines that the semi-qualified product is a qualified product. The worker controls the piston rod of the lifting cylinder 29 to extend upward. When the qualified product is lifted up, the worker takes the qualified product away, thereby completing the detection of the two openings 4 in the semi-qualified product, and finally completing the detection of the four openings 4 in a powder metallurgy plate 1;

[0089] S4. The worker repeats the operations of steps S1 to S3 for multiple times, and the openings 4 of all the powder metallurgy plates 1 in the workshop can be inspected.

[0090] Among them, it can be seen from step S2 that the worker only needs to control the linkage cooperation of the lifting cylinder 9 and the double-acting cylinder 11 of the detection unit 7 to make the spring piece A14 of the lateral micro switch 13 move toward the side wall of the opening 4 of the powder metallurgy tray 1, and at the same time make the spring piece B21 of the vertical micro switch 20 move toward the bottom wall of the opening 4 of the powder metallurgy tray 1, so as to detect the two openings 4 in the powder metallurgy tray 1, and then judge that the powder metallurgy tray 1 is a defective product or a semi-qualified product; from step S 3, the worker only needs to control the linkage of the lifting cylinder 9 and the double-acting cylinder 11 of the detection unit 7 to move the spring A14 of the lateral microswitch 13 toward the side wall of the opening 4 of the semi-qualified product, and at the same time move the spring B21 of the vertical microswitch 20 toward the bottom wall of the opening 4 of the semi-qualified product, so as to detect the two openings 4 in the semi-qualified product, and then judge whether the semi-qualified product is an unqualified product or a qualified product, and then quickly complete the detection of the four openings of the powder metallurgy disk 1.

[0091] It can be seen that the detection device can detect two openings 4 at one time through the linkage cooperation of the detection unit 7 and the positioning and ejection mechanism 8, that is, it only needs to repeat steps S2~S3 twice to complete the detection of all four openings 4 in the powder metallurgy disk 1. Compared with the manual detection method in the workshop, there is no need for workers to detect the openings 4 in multiple processes, which not only greatly reduces the work intensity of the workers, but also realizes the completion of the detection of four openings 4 of a powder metallurgy disk 1 in a short time, thereby greatly improving the opening detection efficiency of the powder metallurgy disk.

[0092] In addition, the detection device can complete the detection of the openings 4 of multiple powder metallurgy trays 1 in the workshop in a short time, further improving the efficiency of the opening detection of the powder metallurgy trays.

Claims

1. An opening detection device for a powder metallurgy plate with multiple openings, characterized in that: It comprises a workbench (5), an arch frame (6) is fixedly provided on the workbench (5), a detection unit (7) for detecting the depth and width of an opening (4) in a powder metallurgy disc (1) is arranged on the arch frame (6), and a positioning and ejection mechanism (8) for positioning and ejecting the powder metallurgy disc (1) is also arranged on the workbench (5), and the positioning and ejection mechanism (8) is arranged directly below the detection unit (7); The detection unit (7) comprises a lifting cylinder (9) fixedly mounted on the top surface of the arch frame (6), the piston rod of the lifting cylinder (9) penetrating downwardly through the arch frame (6), and a connecting plate (10) fixedly mounted on the extended end, a horizontally arranged double-acting cylinder (11) fixedly mounted on the bottom surface of the connecting plate (10), rods (12) welded to the two piston rods of the double-acting cylinder (11), lateral micro switches (13) fixedly mounted on the inner side walls of the lower ends of the two rods (12), the springs A (14) of the lateral micro switches (13) being arranged inwardly, and rollers (15) rotatably mounted on the upper ends of the two rods (12) via pins; Guide rods (16) are fixedly provided on the top surface of the connecting plate (10) and at the left and right ends thereof, and lifting plates (17) are slidably sleeved on the two guide rods (16). Springs (18) are sleeved on the two guide rods (16), and the upper and lower ends of the springs (18) are respectively fixedly provided on the lifting plates (17) and the connecting plate (10); the two lifting plates (17) extend outside the rod member (12), and floating rods (19) are fixedly provided on the extended ends; vertical micro switches (20) are fixedly provided on the bottom surfaces of the two floating rods (19), and the spring pieces B (21) of the vertical micro switches (20) are arranged downward; arc-shaped protrusions (22) are fixedly provided on the bottom surfaces of the two lifting plates (17), and under the elastic force of the springs (18), the two arc-shaped protrusions (22) respectively abut against the top surfaces of the two rollers (15).

2. The opening detection device of a powder metallurgy plate with multiple openings according to claim 1, characterized in that: A plurality of pads supported on the ground are fixedly arranged on the bottom surface of the workbench (5).

3. The opening detection device of a powder metallurgy plate with multiple openings according to claim 2, characterized in that: The positioning and ejection mechanism (8) comprises a frame (23) fixedly mounted on the surface of a workbench (5), a stepping motor (24) fixedly mounted on the top surface of the frame (23), and a turntable (25) fixedly mounted on the output shaft of the stepping motor (24); a positioning column (26) is fixedly mounted on the top surface of the turntable (25); a flat key (27) is fixedly mounted on the cylindrical surface of the positioning column (26) along the axial direction thereof; and four through holes (28) are evenly arranged in the turntable (25) along the circumferential direction of the positioning column (26); A lifting cylinder (29) is fixedly provided on the bottom surface of the frame (23), a piston rod of the lifting cylinder (29) extends into the frame (23), and a lifting plate (30) is fixedly provided on the extended end, two lifting rods (31) are fixedly provided on the top surface of the lifting plate (30), both of the two lifting rods (31) penetrate upward through the top edge of the frame (23), and the two lifting rods (31) are respectively located directly below two through holes (28) in the turntable (25).

4. The opening detection device of a powder metallurgy plate with multiple openings according to claim 3, characterized in that: The outer diameter of the positioning column (26) matches the central hole (2) of the powder metallurgy disk body (1), and the flat key (27) matches the keyway (3) of the powder metallurgy disk body (1).

5. The opening detection device of a powder metallurgy plate with multiple openings according to claim 4, characterized in that: A connecting frame (32) is fixedly provided between the bottom surface of the frame (23) and the workbench (5).

6. The opening detection device of a powder metallurgy plate with multiple openings according to claim 5, characterized in that: The lifting cylinder (9), the positioning column (26), the turntable (25) and the stepping motor (24) are coaxially arranged.

7. The opening detection device of a powder metallurgy plate with multiple openings according to claim 6, characterized in that: The two lateral micro switches (13) are symmetrically arranged with respect to the double-acting cylinder (11), and the two vertical micro switches (20) are symmetrically arranged with respect to the double-acting cylinder (11).

8. The opening detection device of a powder metallurgy plate with multiple openings according to claim 7, characterized in that: The detection device also includes a controller, which is electrically connected to the lifting cylinder (9), the double-acting cylinder (11), the lifting cylinder (29), the stepping motor (24), the lateral micro switch (13) and the vertical micro switch (20) via a signal line.

9. A method for detecting openings of a powder metallurgy plate with multiple openings, using the device for detecting openings of a powder metallurgy plate with multiple openings as claimed in claim 8, characterized in that: It includes the following steps: S1. Positioning of the powder metallurgy disk (1) to be tested: the worker takes out a powder metallurgy disk (1) to be tested, and puts the center hole (2) of the powder metallurgy disk (1) on the positioning column (26) of the positioning and ejection mechanism (8) from top to bottom. At the same time, the keyway (3) of the powder metallurgy disk (1) is put on the flat key (27) of the positioning and ejection mechanism (8) from top to bottom; then the powder metallurgy disk (1) is supported on the top surface of the turntable (25), thereby achieving the positioning of the powder metallurgy disk (1). At this time, the left opening (4) of the powder metallurgy disk (1) is directly below the left lateral microswitch (13) and the vertical microswitch (20), and the right opening (4) of the powder metallurgy disk (1) is directly below the right lateral microswitch (13) and the vertical microswitch (20); S2. Detecting the two openings (4) in the powder metallurgy plate (1). The specific operation steps are as follows: S21, the piston rod of the lifting cylinder (9) of the control detection unit (7) extends downward, the piston rod drives the connecting plate (10) to move downward, the connecting plate (10) drives the double-acting cylinder (11), the two guide rods (16), the two floating rods (19), the two lateral micro switches (13) and the two vertical micro switches (20) to move downward synchronously, when the piston rod of the lifting cylinder (9) is fully extended, the lateral micro switch (13) and the vertical micro switch (20) located on the left side both enter the left side opening (4) of the powder metallurgy disk body (1), and at the same time, the lateral micro switch (13) and the vertical micro switch (20) located on the right side both enter the right side opening (4) of the powder metallurgy disk body (1); S22, the two piston rods of the double-acting cylinder (11) of the control detection unit (7) are simultaneously retracted inward, and the two piston rods respectively drive the two rods (12) to move inward, and the rod (12) drives the lateral micro switch (13) and the roller (15) to move inward synchronously, and the spring piece A (14) of the lateral micro switch (13) moves toward the side wall of the opening (4); at the same time, the roller (15) gradually staggers with the arc-shaped protrusion (22) on the lifting plate (17), and in the process of gradually staggering, the lifting plate (17) moves downward along the guide rod (16), the lifting plate (17) drives the floating rod (19) to move downward, the floating rod (19) drives the vertical micro switch (20) to move downward, and the spring piece B (21) of the vertical micro switch (20) moves toward the bottom wall of the opening (4); When both piston rods of the double-acting cylinder (11) are fully retracted, the rod (12) no longer drives the lateral micro switch (13) to move inward, and at the same time, the roller (15) is just offset from the arc-shaped protrusion (22) on the lifting plate (17); If the controller receives an electrical signal from the lateral microswitch (13) or the vertical microswitch (20), it means that the width or depth of the detected opening (4) does not meet the design requirements, and the worker determines that the powder metallurgy disc (1) is a defective product. At this time, the worker takes out the defective product in the following steps: the worker first controls the piston rod of the lifting cylinder (9) to retract upward so that the lateral microswitch (13) and the vertical microswitch (20) are reset upward, and then controls the piston rod of the lifting cylinder (29) to extend upward, and the piston rod drives the lifting plate (30) to move upward, and the lifting plate (30) drives the two lifting rods (31) to move upward, and the lifting rods (31) pass through the through hole (28) and lift the defective product upward along the positioning column (26). When the defective product is lifted to the outside of the positioning column (26), the worker takes the defective product away; If the controller does not receive the electrical signal from the lateral micro switch (13) and the vertical micro switch (20), it means that the width or depth of the detected opening (4) meets the design requirements, and the worker determines that the powder metallurgy plate (1) is a semi-qualified product, thereby finally completing the inspection of the two openings (4) in the powder metallurgy plate (1); S3. Inspect the two openings (4) in the semi-qualified product. The specific operation steps are as follows: S31. The worker controls the two piston rods of the double-acting cylinder (11) to extend outward, so that the two piston rods respectively drive the two rods (12) to move outward, and the arc-shaped protrusion (22) on the lifting plate (17) abuts against the top of the roller (15) again; S32, the piston rod of the control lifting cylinder (9) is retracted upward, the piston rod drives the connecting plate (10) to move upward, and the connecting plate (10) drives the double-acting cylinder (11), the two guide rods (16), the two floating rods (19), the two lateral micro switches (13) and the two vertical micro switches (20) to move upward synchronously, so that the lateral micro switches (13) and the vertical micro switches (20) are reset; S33, control the stepper motor (24) to start, the stepper motor (24) drives the turntable (25) to rotate, the turntable (25) drives the positioning column (26) and the flat key (27) to rotate, the positioning column (26) and the flat key (27) drive the semi-qualified product to rotate synchronously, when the semi-qualified product rotates 90 degrees, the controller controls the stepper motor (24) to close, at this time, the other two openings (4) in the semi-qualified product enter the inspection station, the lateral micro switch (13) and the vertical micro switch (20) located on the left side enter the left opening (4) of the semi-qualified product, and at the same time, the lateral micro switch (13) and the vertical micro switch (20) located on the right side enter the right opening (4) of the semi-qualified product; S34, the worker repeats the operation of steps S21 to S22 once. If the controller receives an electrical signal from the lateral microswitch (13) or the vertical microswitch (20), it means that the width or depth of the detected opening (4) does not meet the design requirements. The worker determines that the semi-qualified product is a defective product. At this time, the worker takes out the defective product in the following steps: the worker first controls the piston rod of the lifting cylinder (9) to retract upward so that the lateral microswitch (13) and the vertical microswitch (20) are reset upward, and then controls the piston rod of the lifting cylinder (29) to extend upward. When the defective product is pushed to the outside of the positioning column (26), the worker takes the defective product away. If the controller does not receive the electrical signal from the lateral micro switch (13) and the vertical micro switch (20), it means that the width or depth of the detected opening (4) meets the design requirements, and the worker determines that the semi-qualified product is a qualified product. The worker controls the piston rod of the lifting cylinder (29) to extend upward. When the qualified product is lifted up, the worker takes the qualified product away, thereby completing the detection of the two openings (4) in the semi-qualified product, and finally completing the detection of the four openings (4) in a powder metallurgy plate (1); S4. The worker repeats the operations of steps S1 to S3 for multiple times, and the openings (4) of all the powder metallurgy plates (1) in the workshop can be inspected.

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