A metal powder injection molding product testing fixture

Abstract

The present invention belongs to the technical field of metal powder injection molding, and in particular, relates to a metal powder injection molding product inspection jig, including a base frame and two support frames arranged on the upper side wall of the base frame, and a control box is fixedly connected to the right side wall of the support frame located on the right side, and a PLC controller is arranged in the control box. When inspecting metal powder injection molding products, the present invention can automatically select a large number of inspection points for inspection according to the size of the product, and by greatly increasing the inspection points of the product, more inspection data can be obtained, thereby improving the accuracy of product result inspection, and when inspecting metal powder injection molding products, after a defective area is detected, the defective position can be automatically classified and marked according to the defect type, so that the operator can record and analyze the defective position of the product later.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder injection molding, and in particular relates to a metal powder injection molding product detection jig. Background Art

[0002] Metal powder injection molding technology is a new type of powder metallurgy near-net molding technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. Its basic process is: first, the solid powder and the organic binder are evenly mixed, and after granulation, they are injected into the mold cavity by an injection molding machine under a heated plasticized state (150°C) for curing and forming, and then the binder in the molded blank is removed by chemical or thermal decomposition methods, and finally the final product is obtained by sintering and densification. The parts after metal powder injection molding need to be tested using a detection fixture. For example, a metal powder injection molding product detection fixture proposed in patent number CN211426105U is used to detect metal powder injection molding parts.

[0003] When inspecting formed products, existing inspection jigs usually select several points of the product for inspection. Since the size and shape of metal powder particles may be somewhat uneven during the molding stage, for example, some particles may be slightly larger. During the mixing and injection process, the flow characteristics of large-particle powder are different from those of small particles, which may lead to different accumulation conditions at certain locations, thereby affecting the subsequent sintering effect and causing defects at these locations. The uneven distribution of particle size is random, so the defect location is also random. Only selecting several points of the product for inspection may result in inaccurate test results. In addition, the product may also have defects at fixed locations due to molds and production processes. After the existing inspection jigs have completed the product inspection, they lack the function of marking the defect locations, which makes it inconvenient for operators to subsequently record and analyze the defect locations of the products.

[0004] Therefore, a metal powder injection molding product inspection fixture is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a metal powder injection molding product detection fixture in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a metal powder injection molding product inspection jig, comprising a base frame and two support frames arranged on the upper side wall of the base frame, the right side wall of the support frame located on the right side is fixedly connected to a control box, a PLC controller is arranged in the control box, the upper side walls of the two support frames can be fixedly connected to a first linear motor, the moving ends of the two first linear motors are fixedly connected to the same second linear motor, and also includes:

[0007] A connecting seat is fixedly connected to the moving end of the second linear motor, the lower side wall of the connecting seat is fixedly connected to an electric push rod, the moving end of the electric push rod is fixedly connected to a connecting frame, the lower side wall of the connecting frame is fixedly connected to a mounting plate, and the lower side wall of the mounting plate is connected to a detection component;

[0008] A marking component, fixedly connected to the side wall of the mounting plate, used to mark the location of surface defects of the product;

[0009] The positioning component is connected in the chassis and is used to detect the size of the product and control the working range of the detection component and the marking component.

[0010] Preferably, the detection component includes a rotating tube and a detection motor, the rotating tube is rotatably connected to the side wall of the mounting plate, the detection motor is fixedly connected to the lower side wall of the mounting plate, the output end of the detection motor is transmission-connected to the rotating tube through a gear transmission assembly, the lower end of the rotating tube is fixedly connected to the detection seat, the lower side wall of the detection seat is provided with a placement groove, the lower end of the rotating tube is located in the placement groove and is fixedly connected with a telescopic tube, the lower end of the telescopic tube is fixedly connected to the detection head, the outer wall of the detection head is fixedly sleeved with a mounting ring, the upper side groove wall of the placement groove is fixedly connected to a small hydraulic rod, the moving end of the small hydraulic rod is fixedly connected to the upper side wall of the mounting ring, the lower side wall of the mounting ring is fixedly connected to a conductive block, the conductive block is electrically connected to an external power supply, the lower side wall of the detection seat is fixedly connected to a conductive frame, the conductive frame is electrically connected to a PLC controller, and the lower side wall of the detection seat is connected to an induction component.

[0011] Preferably, the sensing component includes an arc-shaped cylinder and an arc-shaped block, the arc-shaped cylinder is fixedly connected to the lower side wall of the detection seat, the arc-shaped block is slidably arranged in the arc-shaped cylinder, and the arc-shaped block is fixedly connected to the inner wall of the arc-shaped cylinder through a spring, the side wall of the arc-shaped block away from the spring is fixedly connected with a sensing block, the sensing block is electrically connected to an external power supply, the inner wall of the arc-shaped cylinder is inlaid with a sensing plate, the sensing plate is electrically connected to a PLC controller, the lower side wall of the arc-shaped block is fixedly connected with a vertical rod, the lower side wall of the arc-shaped cylinder is provided with a sliding opening matching the vertical rod, the lower end of the vertical rod extends out of the sliding opening, and is fixedly connected with a friction block through a pressure sensor.

[0012] Preferably, the marking assembly includes two marking tubes and a transverse tube, the two marking tubes are fixedly connected to the upper side wall of the mounting plate, the two marking tubes are connected to each other through the transverse tube, the lower side tube wall of the transverse tube is fixedly connected with a feeding pipe, the upper end of the rotating tube extends out of the mounting plate, and the lower end of the feeding tube is rotatably connected to the upper port of the rotating tube through a sealing bearing, two control valves are arranged in the transverse tube, the two control valves are respectively located on the left and right sides of the feeding pipe, the two control valves are electrically connected to the PLC controller, a marking channel is opened inside the detection head, the marking channel is connected through a telescopic tube, a rotating tube and a feeding pipe, the lower side wall of the mounting plate is connected with two pressure storage assemblies, the pressure storage assemblies are connected to the corresponding marking assemblies.

[0013] Preferably, the pressure storage assembly includes a pressure storage cylinder and an extrusion block, the pressure storage cylinder is fixedly connected through a bracket and the lower side wall of the mounting plate, the extrusion block is slidably arranged in the pressure storage cylinder, the inner wall of the pressure storage cylinder is fixedly connected with a support ring, two springs are fixedly connected between the support ring and the extrusion block, the side wall of the extrusion block away from the spring is fixedly connected with a triangular plate, one end of the triangular plate away from the extrusion block extends out of the pressure storage cylinder, the upper side wall of the detection seat is symmetrically fixedly connected with two extrusion rods, an air supply pipe is inserted in the support ring, and the air supply pipe is fixed at one end close to the extrusion block It is connected with a telescopic airbag, and one end of the telescopic airbag away from the air supply pipe is fixedly connected with the extrusion block, and one end of the air supply pipe away from the telescopic airbag extends out of the pressure accumulation cylinder, and a regulating valve is provided in the air supply pipe, and the air supply pipe and the marking cylinder on the same side are fixedly connected with the same pressure accumulation pipe, and the upper end of the pressure accumulation pipe is located above the liquid level in the marking cylinder, and an electromagnetic one-way valve is provided in the pressure accumulation pipe, and the lower side wall of the air supply pipe is connected with an air intake pipe, and a check valve is provided in the air intake pipe, and the upper side wall of the marking cylinder is connected with an air pressure sensor, and the air pressure sensor is electrically connected to a PLC controller.

[0014] Preferably, the positioning assembly includes multiple positioning cylinders and multiple conductive rings, the conductive rings and the lower side walls of the positioning cylinders are fixedly connected, the positioning cylinders are inserted into the upper side walls of the base frame and can slide up and down in the base frame, the inner wall of the base frame is fixedly connected with a support plate, the support plate and the positioning cylinders are fixedly connected with the same spring, the upper side walls of the support plate are fixedly connected with multiple transfer rings that cooperate with the conductive rings, the upper side walls of the two first linear motors are fixedly connected with the same top frame, the lower side walls of the top frame are inlaid with multiple positioning blocks, the positioning blocks are electrically connected to the corresponding transfer rings, the upper side wall of the connecting seat is fixedly connected with a metal rod, and the metal rod is electrically connected to the PLC controller.

[0015] Preferably, two elastic tubes are symmetrically fixedly connected to the lower side wall of the mounting plate, the upper inner wall of the elastic tube is fixedly connected to a pressure frame via a spring, and the lower end of the pressure frame extends out of the elastic tube and is fixedly connected to a pressure seat.

[0016] Preferably, the tube wall of the feeding tube is connected to a pneumatic tube, the pneumatic tube is an L-shaped structure, and the upper end of the pneumatic tube is higher than the marking tube.

[0017] Compared with existing technologies, the advantages of a metal powder injection molding product inspection fixture are:

[0018] 1. Through the positioning components set up, when testing metal powder injection molding products, a large number of test points can be automatically selected for testing according to the size of the product. By greatly increasing the test points of the product, more test data can be obtained, thereby improving the accuracy of product test results.

[0019] 2. Through the set marking component, when inspecting metal powder injection molding products, when a defective area is detected, the defective location can be automatically classified and marked according to the defect type, which is convenient for operators to record and analyze the defective locations of the products later. By counting the high-frequency areas and common types of defects, and then combining various links of the production process, the root causes of the defects can be traced, and improvements can be made to improve product quality.

[0020] 3. Through the pressure storage component, gas can be delivered to the marking component while the metal powder injection molding product is being tested, so that a certain air pressure is maintained in the marking component, which is convenient for the outflow of the internal marking pigment. There is no need to re-set the delivery component in the marking component, thereby reducing the cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a metal powder injection molding product detection fixture provided by the present invention;

[0022] Figure 2 This invention provides a metal powder injection molding product detection fixture Figure 1 The main view;

[0023] Figure 3 It is a schematic diagram of the surface structure of a connecting seat in a metal powder injection molding product detection fixture provided by the present invention;

[0024] Figure 4 It is a structural schematic diagram of a marking component in a metal powder injection molding product detection fixture provided by the present invention;

[0025] Figure 5 It is a structural schematic diagram of a detection component in a metal powder injection molding product detection fixture provided by the present invention;

[0026] Figure 6It is a structural schematic diagram of a pressure storage component in a metal powder injection molding product detection fixture provided by the present invention;

[0027] Figure 7 It is a top view of a triangular plate in a metal powder injection molding product inspection fixture provided by the present invention;

[0028] Figure 8 It is a top view cross-sectional view of a sensing component in a metal powder injection molding product detection fixture provided by the present invention;

[0029] Fig. 9 It is a structural schematic diagram of a positioning component in a metal powder injection molding product detection fixture provided by the present invention.

[0030] In the figure: 1 base frame, 2 support frame, 3 control box, 4 PLC controller, 5 first linear motor, 6 second linear motor, 7 connecting seat, 8 electric push rod, 9 connecting frame, 10 mounting plate, 11 detection component, 111 rotating tube, 112 detection motor, 12 detection seat, 13 placement slot, 14 telescopic tube, 15 detection head, 16 mounting ring, 17 small hydraulic rod, 18 conductive block, 19 conductive frame, 20 induction component, 201 arc tube, 202 arc block, 21 induction block, 22 induction plate, 23 vertical rod, 24 friction block, 25 marking component, 251 marking cylinder, 252 cross tube, 26 feeding pipe, 27 control valve, 28 marking channel, 29 pressure storage assembly, 291 pressure storage cylinder, 292 extrusion block, 30 support ring, 31 triangle plate, 32 extrusion rod, 33 air supply pipe, 34 telescopic air bag, 35 regulating valve, 36 pressure storage tube, 37 electromagnetic one-way valve, 38 intake pipe, 39 check valve, 40 air pressure sensor, 41 positioning assembly, 411 positioning cylinder, 412 conductive ring, 42 support plate, 43 transfer ring, 44 top frame, 45 positioning block, 46 metal rod, 47 elastic cylinder, 48 pressure frame, 49 pressure seat, 50 air pressure tube. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] like Figure 1-Figure 9 As shown, a metal powder injection molding product inspection fixture includes a base frame 1 and two support frames 2 arranged on the upper side wall of the base frame 1, a control box 3 is fixedly connected to the right side wall of the right support frame 2, and a PLC controller 4 is arranged in the control box 3, and the upper side walls of the two support frames 2 can be fixedly connected to the first linear motor 5, and the moving ends of the two first linear motors 5 are fixedly connected to the same second linear motor 6, and also include:

[0033] The connecting seat 7 is fixedly connected to the moving end of the second linear motor 6, the lower side wall of the connecting seat 7 is fixedly connected to an electric push rod 8, the moving end of the electric push rod 8 is fixedly connected to a connecting frame 9, the lower side wall of the connecting frame 9 is fixedly connected to a mounting plate 10, the lower side wall of the mounting plate 10 is connected to a detection component 11, the detection component 11 includes a rotating tube 111 and a detection motor 112, the rotating tube 111 is rotatably connected to the side wall of the mounting plate 10, the detection motor 112 is fixedly connected to the lower side wall of the mounting plate 10, the output end of the detection motor 112 is transmission-connected to the rotating tube 111 through a gear transmission component, the lower end of the rotating tube 111 is fixedly connected to a detection seat 12, and the lower side wall of the detection seat 12 is provided with a placement The slot 13, the lower end of the rotating tube 111 is located in the placement slot 13, and is fixedly connected with a telescopic tube 14, the lower end of the telescopic tube 14 is fixedly connected with a detection head 15, the outer wall of the detection head 15 is fixedly sleeved with a mounting ring 16, the upper slot wall of the placement slot 13 is fixedly connected with a small hydraulic rod 17, the moving end of the small hydraulic rod 17 is fixedly connected to the upper side wall of the mounting ring 16, the lower side wall of the mounting ring 16 is fixedly connected with a conductive block 18, the conductive block 18 is electrically connected to an external power supply, the lower side wall of the detection seat 12 is fixedly connected with a conductive frame 19, the conductive frame 19 is electrically connected to the PLC controller 4, and the lower side wall of the detection seat 12 is connected with a sensing component 20, which can detect the density of the product surface;

[0034] The marking assembly 25 is fixedly connected to the side wall of the mounting plate 10 and is used to mark the position of the surface defects of the product. The marking assembly 25 includes two marking tubes 251 and a transverse tube 252. The two marking tubes 251 are fixedly connected to the upper side wall of the mounting plate 10. The two marking tubes 251 are connected to each other through the transverse tube 252. The lower side wall of the transverse tube 252 is fixedly connected with a feed pipe 26. The upper end of the rotating tube 111 extends out of the mounting plate 10, and the lower end of the feed pipe 26 is rotatably connected to the upper port of the rotating tube 111 through a sealed bearing. Two control valves 27 are arranged in the transverse tube 252. The two control valves 27 are respectively located on the left and right sides of the feed pipe 26. The two control valves 27 are electrically connected to the PLC controller 4. The detection head 15 is connected with a marking channel 28, which is connected with the feeding tube 26 through the telescopic tube 14, the rotating tube 111, and the lower side wall of the mounting plate 10 is connected with two pressure storage components 29, which are connected with the corresponding marking components 25. When detecting metal powder injection molding products, when a defective area is detected, the defective position can be automatically classified and marked according to the defect type, which is convenient for operators to record and analyze the defective position of the product in the future. By statistically analyzing the high-frequency areas and common types of defects, the root causes of the defects can be traced back and improved in combination with various links of the production process to improve the quality of the product.

[0035] The positioning assembly 41 is connected to the bottom frame 1 and is used to detect the size of the product and control the working range of the detection assembly 11 and the marking assembly 25. The positioning assembly 41 includes a plurality of positioning cylinders 411 and a plurality of conductive rings 412. The conductive rings 412 are fixedly connected to the lower side wall of the positioning cylinder 411. The positioning cylinder 411 is plugged into the upper side wall of the bottom frame 1 and can slide up and down in the bottom frame 1. The inner wall of the bottom frame 1 is fixedly connected to a support plate 42. The support plate 42 and the positioning cylinder 411 are fixedly connected with the same spring. The upper side wall of the support plate 42 is fixedly connected with a plurality of conductive rings 412 that match each other. The upper side walls of the two first linear motors 5 are fixedly connected to the same top frame 44, the lower side walls of the top frame 44 are inlaid with multiple positioning blocks 45, the positioning blocks 45 are electrically connected to the corresponding transfer rings 43, the upper side wall of the connecting seat 7 is fixedly connected to the metal rod 46, the metal rod 46 is electrically connected to the PLC controller 4, when the metal powder injection molding product is inspected, a large number of inspection points can be automatically selected for inspection according to the size of the product, by greatly increasing the inspection points of the product, more inspection data can be obtained, thereby improving the accuracy of product result inspection.

[0036] The sensing component 20 includes an arc tube 201 and an arc block 202. The arc tube 201 is fixedly connected to the lower side wall of the detection seat 12. The arc block 202 is slidably set in the arc tube 201, and the arc block 202 is fixedly connected to the inner wall of the arc tube 201 through a spring. The side wall of the arc block 202 away from the spring is fixedly connected with a sensing block 21. The sensing block 21 is electrically connected to an external power supply. The inner wall of the arc tube 201 is inlaid with a sensing plate 22. The sensing plate 22 is electrically connected to the PLC controller 4. The lower side wall of the arc block 202 is fixedly connected with a vertical rod 23. The lower side wall of the arc tube 201 is provided with a sliding opening that matches the vertical rod 23. The lower end of the vertical rod 23 extends out of the sliding opening and is fixedly connected with a friction block 24 through a pressure sensor, so that the roughness of the product surface can be detected.

[0037] The pressure storage assembly 29 includes a pressure storage cylinder 291 and an extrusion block 292. The pressure storage cylinder 291 is fixedly connected to the lower side wall of the bracket and the mounting plate 10. The extrusion block 292 is slidably arranged in the pressure storage cylinder 291. The inner wall of the pressure storage cylinder 291 is fixedly connected with a support ring 30. Two springs are fixedly connected between the support ring 30 and the extrusion block 292. The side wall of the extrusion block 292 away from the spring is fixedly connected with a triangular plate 31. The end of the triangular plate 31 away from the extrusion block 292 extends out of the pressure storage cylinder 291. Two extrusion rods 32 are symmetrically fixedly connected to the upper side wall of the detection seat 12. An air supply pipe 33 is inserted in the support ring 30. The end of the air supply pipe 33 close to the extrusion block 292 is fixedly connected with a telescopic airbag 34. The end of the telescopic airbag 34 away from the air supply pipe 33 is fixedly connected to the extrusion block 292. The air supply pipe 33 is away from the telescopic airbag. One end of 34 extends out of the pressure storage cylinder 291, and a regulating valve 35 is provided in the air supply pipe 33. The air supply pipe 33 and the marking cylinder 251 on the same side are fixedly connected with the same pressure storage pipe 36. The upper end of the pressure storage pipe 36 is located above the liquid level in the marking cylinder 251, and an electromagnetic one-way valve 37 is provided in the pressure storage pipe 36. The lower side wall of the air supply pipe 33 is connected to an air intake pipe 38, and a check valve 39 is provided in the air intake pipe 38. The upper side wall of the marking cylinder 251 is connected to an air pressure sensor 40, and the air pressure sensor 40 is electrically connected to the PLC controller 4. While the metal powder injection molding product is being tested, gas can be transported into the marking component 25, so that a certain air pressure is maintained in the marking component 25, which facilitates the outflow of the internal marking pigment, and there is no need to re-set the transport component in the marking component 25, thereby reducing the cost of the equipment.

[0038] Two elastic tubes 47 are symmetrically fixedly connected to the lower side wall of the mounting plate 10, and a pressing frame 48 is fixedly connected to the upper inner wall of the elastic tube 47 via a spring. The lower end of the pressing frame 48 extends out of the elastic tube 47 and is fixedly connected to a pressing seat 49, which can automatically fix the product while detecting the product.

[0039] The tube wall of the feed tube 26 is connected to an air pressure tube 50, which is an L-shaped structure. The upper end of the air pressure tube 50 is higher than the marking tube 251, so that the pigment entering the feed tube 26 can be transported to the marking channel 28 under the action of gravity and flow out.

[0040] The operating principle of the present invention is now described as follows: the metal powder injection molded product to be inspected is placed on the upper side wall of the bottom frame 1. The product will press down a certain number of positioning cylinders 411 under the action of gravity, and the corresponding positioning cylinders 411 will drive the corresponding conductive rings 412 to move downward together, so that the conductive rings 412 are in contact with the transfer rings 43 below, the conductive rings 412 are electrically connected to the external power supply, and the transfer rings 43 are electrically connected to the positioning blocks 45. When the conductive rings 412 and the transfer rings 43 are in contact, the external current will be transmitted to the positioning blocks 45, so that the size of the product can be determined;

[0041] Then the operator transmits an electrical signal to the PLC controller 4 through the control box 3. After receiving the electrical signal, the PLC controller 4 first controls the second linear motor 6 to work (the second linear motor 6 is located at the upper rear side of the base frame 1 in the initial state), and the second linear motor 6 drives the connecting seat 7 to move, and the connecting seat 7 drives the metal rod 46 and the electric push rod 8 to move to the left together (when the moving end of the second linear motor 6 moves to the leftmost position, the PLC controller 4 controls the two first linear motors 5 to work at the same time, and the two first linear motors 5 drive the second linear motors 6 to move forward a certain distance together. The distance that the two first linear motors 5 drive the two second linear motors 6 to move forward is the same as the distance between the front and rear of the two positioning blocks 45). When the metal rod 46 contacts the positioning block 45 with the electrical signal during the movement, the electrical signal will be transmitted to the PLC controller 4 through the positioning block 45 and the metal rod 46;

[0042] After receiving the electrical signal, the PLC controller 4 first controls the second linear motor 6 to stop working, and then controls the electric push rod 8 to work. The electric push rod 8 drives the mounting plate 10 and the detection seat 12 to move downward through the connecting frame 9. The mounting plate 10 will drive the elastic tube 47, the pressure frame 48 and the pressure seat 49 to move downward together. The pressure seat 49 will first contact the upper surface of the product, and the pressure seat 49 will squeeze the upper spring through the pressure frame 48, thereby fixing the product below. Then the detection seat 12 will drive the friction block 24 to contact the upper surface of the product. When the friction block 24 contacts the upper surface of the product, an interaction force will be generated. When the pressure sensor between the vertical rod 23 and the friction block 24 detects that the interaction force reaches the set threshold, the electric push rod 8 will be controlled to stop working through the PLC controller 4, so that a certain pressure is maintained between the friction block 24 and the product. Then the PLC controller 4 controls the detection motor 112 to work, and the detection motor 112 controls the rotation of the rotating tube 111 through the gear transmission assembly (The output end of the detection motor 112 is fixedly connected with a gear, and the outer wall of the rotating tube 111 is fixedly sleeved with a gear ring that meshes with the gear), the rotating tube 111 drives the detection seat 12 to rotate, and the detection seat 12 drives the arc tube 201 to rotate together. During the rotation, the arc tube 201 will squeeze the arc block 202 through the internal spring. When the elastic force of the spring compression is greater than the friction between the friction block 24 and the product, the friction block 24 will slide on the surface of the product. When the surface roughness of the product is greater, the compression of the spring will be greater, and the sliding distance of the arc block 202 in the arc tube 201 will be greater. During the sliding process of the arc block 202 in the arc tube 201, the induction block 21 and the induction plate 22 will be driven to contact. The induction block 21 is electrically connected to the external power supply, and the induction plate 22 is electrically connected to the PLC controller 4. When the induction block 21 and the induction plate 22 are in contact, an electrical signal will be transmitted to the PLC controller 4. After receiving the electrical signal, the PLC controller 4 will indicate that the roughness of the product is too large at that location;

[0043] The PLC controller 4 first controls the detection motor 112 to stop working, and then controls the right control valve 27 to open for 0.3 seconds. The two marking cylinders 251 have a certain air pressure inside, and the pigment in the right marking cylinder 251 (the pigment in the right marking cylinder 251 is red) will be transported to the feeding pipe 26 through the horizontal pipe 252, and drip onto the surface of the product through the feeding pipe 26, the telescopic pipe 14 and the marking channel 28, indicating that the roughness of the area is too large and the pigment can be cleaned later;

[0044] Then the PLC controller 4 will control the small hydraulic rod 17 to work, and the small hydraulic rod 17 will drive the detection head 15 to move downward through the mounting ring 16, so that the detection head 15 contacts the surface of the product. When the surface density of the product is low, there are more pores or the atoms and molecules are arranged relatively loosely. When the detection head 15 is subjected to the downward pressure of the small hydraulic rod 17, the material in the low-density area cannot disperse and resist the pressure as effectively as the high-density area due to its relatively loose structure. It is more likely to deform and displace under the pressure, so that the detection head 15 can enter the area more deeply, resulting in a larger downward movement distance. The detection head 15 will drive the conductive block 18 to move downward to a farther position through the mounting ring 16, so that the conductive block 18 contacts the conductive frame 19, and the conductive block 18 is electrically connected to the external power supply. The conductive frame 19 is electrically connected to the PLC controller 4. When the conductive block 18 and the conductive frame 19 are in contact, an electrical signal will be transmitted to the PLC controller 4. After receiving the electrical signal, the PLC controller 4 will control the small hydraulic rod 17 to stop working, and drip the pigment in the left marking cylinder 251 (the pigment in the left marking cylinder 251 is green) to the area, so that the green pigment and the red pigment are mixed into yellow. By observing the color of the pigment on the surface of the product, the problem in the area of ​​the product can be judged. The single red pigment indicates that the roughness of the area is too large, the single green indicates that the density of the area is low, and the yellow indicates that the roughness and density of the area are not up to standard. After the detection of one area of ​​the product is completed, referring to the above principle, other areas of the product can be detected, thereby achieving the purpose of multi-point detection;

[0045] When the detection motor 112 drives the detection seat 12 to rotate, the detection seat 12 will drive the two squeezing rods 32 on the upper surface to rotate together. The squeezing rods 32 will contact the inclined surface of the triangular plate 31 during the rotation. The extrusion rods 32 and the inclined surfaces of the triangular plate 31 cooperate with each other to control the triangular plate 31 to move toward the inside of the pressure storage cylinder 291. The triangular plate 31 will drive the squeezing block 292 to move. The squeezing block 292 is used to squeeze the telescopic airbag 34, so that the gas inside the telescopic airbag 34 is transported to the corresponding marking cylinder 251 through the feeding pipe 26, so that the air pressure in the marking cylinder 251 increases. When the squeezing rod 32 and the triangular plate 31 are separated, the squeezing block 292 will drive the triangular plate 31 to move outward under the action of the spring force. , thereby reducing the air pressure inside the telescopic airbag 34. Under the action of atmospheric pressure, external gas will be transported to the telescopic airbag 34 through the air inlet pipe 38, the check valve 39 and the air supply pipe 33 for storage. When the air pressure sensor 40 detects that the air pressure inside the marking tube 251 reaches the set threshold, the air pressure sensor 40 will control the corresponding electromagnetic one-way valve 37 to close (the electromagnetic one-way valve 37 is in the energized open state in the initial state) through the PLC controller 4, and control the corresponding regulating valve 35 to open. When the telescopic airbag 34 is compressed again, the gas inside the telescopic airbag 34 will be directly discharged through the air supply pipe 33, so that the inside of the marking tube 251 can always maintain the set air pressure, which is convenient for the subsequent spraying of pigments.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal powder injection molding product inspection jig, comprising a base frame (1) and two support frames (2) arranged on the upper side wall of the base frame (1), the right side wall of the support frame (2) located on the right side is fixedly connected to a control box (3), a PLC controller (4) is arranged in the control box (3), the upper side walls of the two support frames (2) can be fixedly connected to a first linear motor (5), the moving ends of the two first linear motors (5) are fixedly connected to the same second linear motor (6), characterized in that: Also includes: A connecting seat (7) is fixedly connected to the moving end of the second linear motor (6); an electric push rod (8) is fixedly connected to the lower side wall of the connecting seat (7); the moving end of the electric push rod (8) is fixedly connected to a connecting frame (9); a mounting plate (10) is fixedly connected to the lower side wall of the connecting frame (9); and a detection component (11) is connected to the lower side wall of the mounting plate (10); A marking component (25) fixedly connected to the side wall of the mounting plate (10) and used to mark the location of a defect on the surface of the product; A positioning assembly (41) is connected to the base frame (1) and is used to detect the size of the product and control the working range of the detection assembly (11) and the marking assembly (25). The detection assembly (11) comprises a rotating tube (111) and a detection motor (112). The rotating tube (111) is rotatably connected to the side wall of the mounting plate (10). The detection motor (112) is fixedly connected to the lower side wall of the mounting plate (10). The output end of the detection motor (112) is transmission-connected to the rotating tube (111) via a gear transmission assembly. The lower end of the rotating tube (111) is fixedly connected to a detection seat (12). The lower side wall of the detection seat (12) is provided with a placement groove (13). The lower end of the rotating tube (111) is located in the placement groove (13). , and is fixedly connected with a telescopic tube (14), the lower end of the telescopic tube (14) is fixedly connected with a detection head (15), the outer wall of the detection head (15) is fixedly sleeved with a mounting ring (16), the upper side groove wall of the placement groove (13) is fixedly connected with a small hydraulic rod (17), the movable end of the small hydraulic rod (17) is fixedly connected to the upper side wall of the mounting ring (16), the lower side wall of the mounting ring (16) is fixedly connected with a conductive block (18), the conductive block (18) is electrically connected to an external power supply, the lower side wall of the detection seat (12) is fixedly connected with a conductive frame (19), the conductive frame (19) is electrically connected to a PLC controller (4), the lower side wall of the detection seat (12) is connected with a sensing component (20), the sensing component (20) is fixedly connected to the upper side wall of the placement groove (13), the movable end of the small hydraulic rod (17) is fixedly connected to the upper side wall of the mounting ring (16), the lower side wall of the mounting ring (16) is fixedly connected with a conductive block (18), the conductive block (18) is electrically connected to an external power supply, the lower side wall of the detection seat (12) is fixedly connected with a conductive frame (19), the conductive frame (19) is electrically connected to a PLC controller (4), the lower side wall of the detection seat (12) is connected with a sensing component (20), The component (20) comprises an arc-shaped cylinder (201) and an arc-shaped block (202), wherein the arc-shaped cylinder (201) is fixedly connected to the lower side wall of the detection seat (12), the arc-shaped block (202) is slidably arranged in the arc-shaped cylinder (201), and the arc-shaped block (202) is fixedly connected to the inner wall of the arc-shaped cylinder (201) via a spring, a side wall of the arc-shaped block (202) away from the spring is fixedly connected to a sensing block (21), and the sensing block (21) is electrically connected to an external power supply, the inner wall of the arc-shaped cylinder (201) is inlaid with a sensing plate (22), and the sensing plate (22) is electrically connected to a PLC controller (4), the lower side wall of the arc-shaped block (202) is fixedly connected to a vertical rod (23), and the lower side wall of the arc-shaped cylinder (201) is provided with a The vertical rod (23) has a sliding opening that matches the vertical rod (23), the lower end of the vertical rod (23) protrudes from the sliding opening and is fixedly connected to a friction block (24) via a pressure sensor, the marking assembly (25) comprises two marking cylinders (251) and a transverse tube (252), the two marking cylinders (251) are fixedly connected to the upper side wall of the mounting plate (10), the two marking cylinders (251) are connected to each other via the transverse tube (252), the lower side wall of the transverse tube (252) is fixedly connected to a feed pipe (26), the upper end of the rotating tube (111) protrudes from the mounting plate (10), and the lower end of the feed pipe (26) is rotatably connected to the upper port of the rotating tube (111) via a sealing bearing, and two control valves (27) are arranged in the transverse tube (252),The two control valves (27) are respectively located on the left and right sides of the feeding pipe (26), and the two control valves (27) are electrically connected to the PLC controller (4). A marking channel (28) is provided inside the detection head (15), and the marking channel (28) is connected to the feeding pipe (26) through a telescopic tube (14), a rotating tube (111), and two pressure storage components (29) are connected to the lower side wall of the mounting plate (10), and the pressure storage components (29) are connected to the corresponding marking components (25). The pressure storage components (29) include a pressure storage The pressure storage cylinder (291) and the extrusion block (292) are fixedly connected via a bracket and a lower side wall of the mounting plate (10); the extrusion block (292) is slidably arranged in the pressure storage cylinder (291); a support ring (30) is fixedly connected to the inner wall of the pressure storage cylinder (291); two springs are fixedly connected between the support ring (30) and the extrusion block (292); a triangular plate (31) is fixedly connected to the side wall of the extrusion block (292) away from the springs; one end of the triangular plate (31) away from the extrusion block (292) protrudes out of the pressure storage cylinder The pressure cylinder (291) is symmetrically fixedly connected to the upper side wall of the detection seat (12) with two extrusion rods (32), an air supply pipe (33) is inserted into the support ring (30), one end of the air supply pipe (33) close to the extrusion block (292) is fixedly connected to a telescopic air bag (34), one end of the telescopic air bag (34) away from the air supply pipe (33) is fixedly connected to the extrusion block (292), one end of the air supply pipe (33) away from the telescopic air bag (34) extends out of the pressure storage cylinder (291), and a regulating valve (35) is provided in the air supply pipe (33). The air supply pipe (33) and the marking tube (251) on the same side are fixedly connected to a same pressure storage pipe (36), the upper end of the pressure storage pipe (36) is located above the liquid level in the marking tube (251), an electromagnetic one-way valve (37) is provided in the pressure storage pipe (36), the lower tube wall of the air supply pipe (33) is connected to an air intake pipe (38), and a check valve (39) is provided in the air intake pipe (38), the upper wall of the marking tube (251) is connected to an air pressure sensor (40), and the air pressure sensor (40) is electrically connected to a PLC controller (4).

2. A metal powder injection molding product inspection jig according to claim 1, characterized in that: The positioning assembly (41) comprises a plurality of positioning cylinders (411) and a plurality of conductive rings (412); the conductive rings (412) are fixedly connected to the lower side walls of the positioning cylinders (411); the positioning cylinders (411) are plugged into the upper side walls of the base frame (1) and can slide up and down in the base frame (1); a support plate (42) is fixedly connected to the inner wall of the base frame (1); a same spring is fixedly connected between the support plate (42) and the positioning cylinders (411); the support plate (42) The upper side wall is fixedly connected to a plurality of transfer rings (43) that cooperate with the conductive ring (412); the upper side walls of the two first linear motors (5) are fixedly connected to the same top frame (44); the lower side wall of the top frame (44) is inlaid with a plurality of positioning blocks (45); the positioning blocks (45) are electrically connected to the corresponding transfer rings (43); the upper side wall of the connecting seat (7) is fixedly connected to a metal rod (46); the metal rod (46) is electrically connected to the PLC controller (4).

3. The metal powder injection molding product detection fixture according to claim 1, characterized in that: Two elastic cylinders (47) are symmetrically fixedly connected to the lower side wall of the mounting plate (10); the upper inner wall of the elastic cylinder (47) is fixedly connected to a pressing frame (48) via a spring; the lower end of the pressing frame (48) extends out of the elastic cylinder (47) and is fixedly connected to a pressing seat (49).

4. The metal powder injection molding product detection fixture according to claim 1, characterized in that: The tube wall of the feeding tube (26) is connected to an air pressure tube (50), the air pressure tube (50) is an L-shaped structure, and the upper end of the air pressure tube (50) is higher than the marking tube (251).

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