A hardness testing device for drag chain production

Abstract

The present invention belongs to the technical field of hardness testing, and in particular relates to a hardness testing device for use in drag chain production, comprising a testing frame, wherein the lower side wall of the testing frame is fixedly connected to a PLC controller, the upper side wall of the testing frame is fixedly connected to a display screen structure, the inner wall of the testing frame is fixedly connected to a placement plate, the upper side wall of the placement plate is fixedly connected to a first linear motor, the output end of the first linear motor is fixedly connected to a second linear motor, and the output end of the second linear motor is fixedly connected to a mesh cover. The present invention can heat and cool the drag chain components before sampling and testing the hardness of the drag chain components, simulating whether the performance of the drag chain changes under extreme environments, and when the drag chain is heated, the coating on the surface of the drag chain components can be cleaned off by high temperature, thereby avoiding the situation where the coating on the surface of the drag chain distorts the drag chain hardness test data.

Description

Technical Field

[0001] The invention belongs to the technical field of hardness detection, and in particular relates to a hardness detection device for drag chain production. Background Art

[0002] Drag chains are suitable for use in reciprocating motion situations and can pull and protect built-in cables, oil pipes, air pipes, water pipes, etc., thereby extending the service life of wires, cables, liquid and gas hoses and reducing consumption;

[0003] Hardness is one of the key indicators for measuring the performance of drag chain materials. By testing the hardness, it can be ensured that the drag chain meets the specified quality standards during the manufacturing process and reduce the defective rate. If the hardness does not meet the standard, the drag chain may easily crack or break during operation, affecting the normal operation of the entire equipment. Therefore, during the production process of the drag chain, it is necessary to sample and test the hardness of the drag chain after production. For example, a hardness testing device for drag chain production proposed in patent publication number CN219245189U is used for testing drag chains after production.

[0004] The existing detection device has the following problems when in use:

[0005] When using a hardness testing device to test the components of a drag chain, a fixture is usually used to clamp the component, and then a certain point on the component is selected for hardness testing. However, since the structure of the drag chain is not completely uniform, deviations are likely to occur when selecting the testing point. If the testing point cannot represent the overall hardness level of the drag chain, the result obtained will lack reliability. In addition, in order to effectively reduce the wear caused by the contact between the drag chain and other objects during movement and to extend the service life of the drag chain, a layer of coating will be sprayed on the surface of the drag chain during the production process of the drag chain. Since the coating itself has a certain hardness and there may be a large difference between the hardness of the drag chain body and the hardness of the drag chain body, the hardness value measured by the hardness testing equipment is not the true hardness of the drag chain body, but a comprehensive performance of the hardness of the coating and the drag chain body, which will lead to serious distortion of the measurement data.

[0006] Therefore, a hardness testing device for drag chain production is proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a hardness detection device for drag chain production in order to solve the above problems.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a hardness testing device for drag chain production, comprising a testing frame, the lower side wall of the testing frame is fixedly connected to a PLC controller, the upper side wall of the testing frame is fixedly connected to a display screen structure, the inner wall of the testing frame is fixedly connected to a placement plate, the upper side wall of the placement plate is fixedly connected to a first linear motor, the output end of the first linear motor is fixedly connected to a second linear motor, the output end of the second linear motor is fixedly connected to a mesh cover, a component to be tested is placed in the mesh cover, the upper side wall of the placement plate is connected to a pretreatment component, the component to be tested is pretreated by the pretreatment component, the right side wall of the testing frame is fixedly connected to an air pump, the air outlet end of the air pump is connected to the pretreatment component, the upper side wall of the testing frame is fixedly connected to a clamp component, the component to be tested is clamped by the clamp component, the upper side wall of the testing frame is fixedly connected to a testing component, and the testing component is electrically connected to the PLC controller and the display screen structure.

[0009] Preferably, the pretreatment component includes a heating box and a refrigeration box, the heating box is fixedly connected to the upper side wall of the placement plate, the right inner wall of the detection frame is fixedly connected to the connecting frame, the refrigeration box is fixedly connected to the upper side wall of the connecting frame, the right side walls of the heating box and the refrigeration box are rotatably connected to short tubes, the right side walls of the heating box and the refrigeration box are fixedly connected to a control motor, the output end of the control motor is connected to the short tube through a bevel gear transmission assembly, the two short tubes are rotatably connected to the same U-shaped tube, and the air outlet end of the air pump passes through the detection frame The side wall of the short tube on the upper side is fixedly connected to a blowing plate, and the side wall of the blowing plate is fixedly connected to the side wall away from the short tube. Multiple air outlet heads are fixedly connected to the upper side wall of the refrigeration box. Multiple semiconductor refrigeration plates are fixedly connected, and the refrigeration end of the semiconductor refrigeration plate is located inside the refrigeration box.

[0010] Preferably, the clamp assembly includes a working box and a threaded rod, the working box is fixedly connected to the upper side wall of the detection frame, the threaded rod is rotatably connected to the inner wall of the working box, the rod wall of the threaded rod is threadedly sleeved with two threaded barrels, the left and right sides of the threaded rod have opposite threads, the upper side walls of the two threaded barrels are fixedly connected with a bent rod, the upper side wall of the working box is provided with a sliding opening that matches the bent rod, the upper end of the bent rod extends out of the sliding opening and is fixedly connected with a clamping barrel, and the two clamping barrels are fixedly connected by springs There is a clamping rod, and one end of the clamping rod extending out of the clamping cylinder is fixedly connected to a clamping block. A placement table located on the upper side wall of the working box is provided between the two clamping blocks. The right side wall of the working box is fixedly connected to a servo motor, and the output end of the servo motor passes through the side wall of the working box and is fixedly connected to the threaded rod. The left side wall of the clamping rod on the left is fixedly connected to a conductive block, and the conductive block is electrically connected to an external power supply. The inner wall of the clamping cylinder on the left is inlaid with a conductive plate, and the conductive plate is electrically connected to the positive circuit of the servo motor.

[0011] Preferably, the detection component includes a third linear motor and a moving rod, the output end of the third linear motor is fixedly connected to the moving rod, the upper end of the moving rod is electrically connected to the third linear motor, the output end of the third linear motor is fixedly connected to the fourth linear motor, the output end of the fourth linear motor is fixedly connected to a micro-electric push rod, the output end of the micro-electric push rod is fixedly connected to a pressure rod, the left and right sides of the pressure rod are fixedly connected to a horizontal plate, the lower side wall of the horizontal plate is fixedly connected to a vertical cylinder, the upper inner wall of the vertical cylinder is fixedly connected to a lifting frame through a spring, the lower ends of the two lifting frames extend out of the vertical cylinder and are fixedly connected to the same pressure ring, the pressure rod is located in the middle position of the pressure ring, the rod wall of the pressure rod is fixedly connected to a power-on piece, the power-on piece is electrically connected to an external power supply, the right side wall of the lifting frame on the left is fixedly connected to a resistor plate through a horizontal pin, the lower end of the resistor plate is electrically connected to the display screen structure through a PLC controller, and a positioning component is provided above the detection component.

[0012] Preferably, the positioning assembly includes a vertical plate and a positioning box, the vertical plate is fixedly connected to the upper side wall of the detection frame, the positioning box is fixedly connected to the upper end of the vertical plate, the upper and lower side walls of the positioning box are provided with a plurality of sockets, and the same positioning pin is inserted into the sockets located on the same straight line, the lower end of the positioning pin extends out of the positioning box and is fixedly connected to a positioning block, the positioning block is electrically connected to the PLC controller, the upper side wall of the micro electric push rod is fixedly connected to a positioning plate, the positioning plate is electrically connected to an external power supply, and the lower side wall of the positioning box is fixedly connected to a plurality of friction rings sleeved on the outside of the positioning pin.

[0013] Preferably, the positioning pin is located in the positioning box and the rod wall fixing sleeve is provided with a connecting ring. The upper side wall of the positioning box is fixedly connected with a homing electric push rod. The output end of the homing electric push rod is fixedly connected with a porous plate, and the lower end of the positioning pin passes through the porous plate.

[0014] Preferably, an electric fan is fixedly connected to the lower side wall of the detection frame, and the electric fan is located above the multiple semiconductor refrigeration plates.

[0015] Preferably, the upper side wall of the positioning box is fixedly connected to a limiting seat, and the limiting seat is located on the right side of the plurality of positioning pins.

[0016] Compared with existing technologies, the advantages of a hardness testing device for drag chain production are:

[0017] 1. Through the pre-treatment components, the drag chain components can be heated and cooled before sampling and testing the hardness of the drag chain component samples to simulate whether the performance of the drag chain changes under extreme environments. When the drag chain is heated, the high temperature can be used to clean the coating on the surface of the drag chain components, avoiding the situation where the coating on the surface of the drag chain will distort the drag chain hardness test data.

[0018] 2. Through the detection components and positioning components set up, when sampling and testing the hardness of the drag chain components, it is possible to automatically sample and test multiple areas of the drag chain components according to the shape and size of the drag chain components, avoiding the problem of large local performance deviation of the drag chain components, which will affect the accuracy of the drag chain hardness test results.

[0019] 3. By setting up the clamp assembly, an appropriate clamping force can be applied to the drag chain components during the hardness test. While ensuring the clamping stability of the drag chain components, it also avoids the problem of excessive clamping force on the drag chain components, which will cause changes in the internal stress of the drag chain and affect the hardness test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a hardness testing device for drag chain production provided by the present invention;

[0021] Figure 2 This is a structural schematic diagram of a pre-treatment component in a hardness testing device for drag chain production provided by the present invention;

[0022] Figure 3 This is a structural schematic diagram of a bent plate in a hardness testing device for drag chain production provided by the present invention;

[0023] Figure 4 This is a schematic diagram of the positional relationship between the micro electric push rod and the fourth linear motor in a hardness testing device for drag chain production provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the surface structure of a pressure rod in a hardness testing device for drag chain production provided by the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of a positioning box in a hardness testing device for drag chain production provided by the present invention;

[0026] Figure 7 This is a top view of a positioning box in a hardness testing device for drag chain production provided by the present invention;

[0027] Figure 8 It is a structural schematic diagram of a clamp assembly in a hardness testing device for drag chain production provided by the present invention.

[0028] In the figure: 1 detection frame, 2 PLC controller, 3 display structure, 4 placement plate, 5 first linear motor, 6 second linear motor, 7 mesh cover, 8 air pump, 9 pretreatment component, 91 heating box, 92 refrigeration box, 10 connecting frame, 11 short pipe, 12 control motor, 13 U-shaped pipe, 14 control valve, 15 bent plate, 16 heating plate, 17 air outlet, 18 blowing plate, 19 air outlet head, 20 semiconductor refrigeration plate, 21 fixture assembly, 211 working box, 212 threaded rod, 22 threaded cylinder, 23 bent rod, 24 clamping cylinder, 25 clamping rod, 26 Clamping block, 27 servo motor, 28 conductive block, 29 conductive plate, 30 detection assembly, 301 third linear motor, 302 moving rod, 31 micro electric push rod, 32 pressure rod, 33 horizontal plate, 34 vertical cylinder, 35 lifting frame, 36 pressure ring, 37 power plate, 38 resistor plate, 39 positioning assembly, 391 vertical plate, 392 positioning box, 40 jack, 41 positioning pin, 42 positioning block, 43 positioning plate, 44 friction ring, 45 connecting ring, 46 homing electric push rod, 47 porous plate, 48 electric fan, 49 limit seat, 50 fourth linear motor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0030] like Figures 1-8As shown, a hardness testing device for drag chain production includes a testing frame 1, the lower side wall of the testing frame 1 is fixedly connected to a PLC controller 2, the upper side wall of the testing frame 1 is fixedly connected to a display screen structure 3, the inner wall of the testing frame 1 is fixedly connected to a placement plate 4, the upper side wall of the placement plate 4 is fixedly connected to a first linear motor 5, the output end of the first linear motor 5 is fixedly connected to a second linear motor 6, the output end of the second linear motor 6 is fixedly connected to a mesh cover 7, a component to be tested is placed in the mesh cover 7, the upper side wall of the placement plate 4 is connected to a pretreatment component 9, the component to be tested is pretreated by the pretreatment component 9, the right side wall of the testing frame 1 is fixedly connected to an air pump 8, the air outlet end of the air pump 8 is connected to the pretreatment component 9, the upper side wall of the testing frame 1 is fixedly connected to a clamp component 21, the component to be tested is clamped by the clamp component 21, the upper side wall of the testing frame 1 is fixedly connected to a detection component 30, and the detection component 30 is electrically connected to the PLC controller 2 and the display screen structure 3.

[0031] The pretreatment component 9 includes a heating box 91 and a refrigeration box 92. The heating box 91 is fixedly connected to the upper side wall of the placement plate 4. The right inner wall of the detection frame 1 is fixedly connected to the connecting frame 10. The refrigeration box 92 is fixedly connected to the upper side wall of the connecting frame 10. The right side walls of the heating box 91 and the refrigeration box 92 are rotatably connected to a short tube 11. The right side walls of the heating box 91 and the refrigeration box 92 are fixedly connected to a control motor 12. The output end of the control motor 12 is connected to the short tube 11 through a bevel gear transmission assembly. The two short tubes 11 are rotatably connected to the same U-shaped tube 13. The air outlet end of the air pump 8 passes through the side wall of the detection frame 1 and is connected to the U-shaped tube 13. Two control valves 14 are provided in the U-shaped tube 13. The left end of the lower short tube 11 is fixedly connected to a bent plate 15. The bent plate 15 is a hollow structure. A plurality of heating plates 16 are fixedly connected to the side wall of the plate 15, and a plurality of air outlet holes 17 are provided on the side wall of the bent plate 15 near the heating plate 16. A blowing plate 18 is fixedly connected to the left end of the upper short tube 11, and a plurality of air outlet heads 19 are fixedly connected to the side wall of the blowing plate 18 away from the short tube 11. A plurality of semiconductor refrigeration plates 20 are fixedly connected to the upper side wall of the refrigeration box 92, and the refrigeration end of the semiconductor refrigeration plate 20 is located in the refrigeration box 92. Before sampling and testing the hardness of the drag chain components, the drag chain components can be heated and cooled to simulate whether the performance of the drag chain changes under extreme environments. When the drag chain is heated, the high temperature can be used to clean the coating on the surface of the drag chain components to avoid the situation where the coating on the surface of the drag chain will distort the drag chain hardness test data.

[0032] The clamp assembly 21 includes a working box 211 and a threaded rod 212. The working box 211 is fixedly connected to the upper side wall of the detection frame 1. The threaded rod 212 is rotatably connected to the inner wall of the working box 211. The rod wall of the threaded rod 212 is threadedly sleeved with two threaded cylinders 22. The left and right sides of the threaded rod 212 have opposite threads. The upper side walls of the two threaded cylinders 22 are fixedly connected with a bent rod 23. The upper side wall of the working box 211 is provided with a sliding opening that matches the bent rod 23. The upper end of the bent rod 23 extends out of the sliding opening and is fixedly connected with a clamping cylinder 24. The two clamping cylinders 24 are fixedly connected with a clamping rod 25 through a spring. One end of the clamping rod 25 extending out of the clamping cylinder 24 is fixedly connected with a clamping block 26. There is a clamping block located in the middle of the two clamping blocks 26. 1 is a placement table on the upper side wall, and the right side wall of the working box 211 is fixedly connected to a servo motor 27. The output end of the servo motor 27 passes through the side wall of the working box 211 and is fixedly connected to the threaded rod 212. The left side wall of the left clamping rod 25 is fixedly connected to a conductive block 28. The conductive block 28 is electrically connected to an external power supply. The inner wall of the left clamping cylinder 24 is inlaid with a conductive plate 29. The conductive plate 29 is electrically connected to the positive circuit of the servo motor 27. When performing hardness testing on the drag chain components, an appropriate clamping force can be applied to the drag chain components. While ensuring the clamping stability of the drag chain components, it also avoids the problem of excessive clamping force on the drag chain components, which causes changes in the internal stress of the drag chain and thus affects the hardness test results.

[0033] The detection component 30 includes a third linear motor 301 and a moving rod 302. The output end of the third linear motor 301 is fixedly connected to the moving rod 302. The upper end of the moving rod 302 is electrically connected to the third linear motor 301. The output end of the third linear motor 301 is fixedly connected to the fourth linear motor 50. The output end of the fourth linear motor 50 is fixedly connected to the micro electric push rod 31. The output end of the micro electric push rod 31 is fixedly connected to the pressure rod 32. The left and right sides of the pressure rod 32 are fixedly connected to the cross plate 33. The lower side wall of the plate 33 is fixedly connected to a vertical cylinder 34, and the upper inner wall of the vertical cylinder 34 is fixedly connected to a lifting frame 35 through a spring. The lower ends of the two lifting frames 35 extend out of the vertical cylinder 34 and are fixedly connected to the same pressure ring 36. The pressure rod 32 is located in the middle of the pressure ring 36. The rod wall of the pressure rod 32 is fixedly connected to a power supply sheet 37, which is electrically connected to an external power supply. The right side wall of the left lifting frame 35 is fixedly connected to a resistor plate 38 through a horizontal pin. The lower end of the resistor plate 38 is connected to the PLC controller 2 and the display The screen structure 3 is electrically connected. A positioning assembly 39 is provided above the detection assembly 30. The positioning assembly 39 includes a vertical plate 391 and a positioning box 392. The vertical plate 391 is fixedly connected to the upper side wall of the detection frame 1. The positioning box 392 is fixedly connected to the upper end of the vertical plate 391. The upper and lower side walls of the positioning box 392 are provided with a plurality of jacks 40, and the same positioning pin 41 is inserted into the jacks 40 located on the same straight line. The lower end of the positioning pin 41 extends out of the positioning box 392 and is fixedly connected to a positioning block 42. The positioning block 42 and The PLC controller 2 is electrically connected, the upper side wall of the micro electric push rod 31 is fixedly connected with a positioning plate 43, the positioning plate 43 is electrically connected to the external power supply, and the lower side wall of the positioning box 392 is fixedly connected with a plurality of friction rings 44 arranged on the outside of the positioning pin 41. When sampling and testing the hardness of the drag chain components, it can automatically sample and test multiple areas of the drag chain components according to the shape and size of the drag chain components, thereby avoiding the problem that the local performance deviation of the drag chain components is large, which will affect the accuracy of the drag chain hardness test results.

[0034] The locating pin 41 is located in the rod wall fixed sleeve inside the positioning box 392 and is provided with a connecting ring 45. The upper side wall of the positioning box 392 is fixedly connected with a return electric push rod 46. The output end of the return electric push rod 46 is fixedly connected with a porous plate 47. The lower end of the locating pin 41 passes through the porous plate 47, which can restore all the locating pins 41 to their original position.

[0035] An electric fan 48 is fixedly connected to the lower side wall of the detection frame 1. The electric fan 48 is located above the multiple semiconductor refrigeration plates 20, which accelerates the reduction of the temperature of the heat dissipation end of the semiconductor refrigeration plates 20.

[0036] The upper side wall of the positioning box 392 is fixedly connected to the limit seat 49 , which is located on the right side of the plurality of positioning pins 41 , making it convenient for the operator to press down the drag chain component along the limit seat 49 .

[0037] The operating principle of the present invention is now explained as follows: a sample of the drag chain component (a drag chain made of metal material) is placed in the mesh cover 7, and then a start instruction is sent to the PLC controller 2 through the operation interface. After receiving the instruction, the PLC controller 2 first controls the second linear motor 6 to work, and the second linear motor 6 drives the mesh cover 7 to move, so that the mesh cover 7 drives the drag chain component to move to the inner wall of the heating box 91, and then the PLC controller 2 controls the air pump 8, the heating plate 16, the lower control motor 12 and the lower control valve 14 to work. The air pump 8 transports the external gas into the bent plate 15 through the U-shaped tube 13 and the lower short tube 11, and ejects it through the air outlet 17 on the surface of the bent plate 15. After being heated by the heating plate 16, the air flow will blow towards the drag chain component, and the lower control motor 12 controls the lower short tube 11 through the bevel gear transmission assembly to drive the bent plate 15 to rotate, so that the drag chain component is heated in all directions. The coating on the surface of the drag chain component will be heated by the high temperature and softened, decomposed or even burned, thereby detaching from the drag chain surface. After the plate 16 has worked for a set time, the PLC controller 2 controls the heating plate 16 to stop working, and controls the lower control valve 14 to close and the upper control valve 14 to open. Then, the PLC controller 2 controls the second linear motor 6 to move in the opposite direction, and the second linear motor 6 drives the mesh cover 7 and the drag chain component to move out of the heating box 91. Then, the PLC controller 2 controls the first linear motor 5 to work, and the first linear motor 5 drives the second linear motor 6 and the drag chain component to move upward to the set position. Then, the PLC controller 2 controls the second linear motor 6 to drive the heated drag chain component to move into the refrigeration box 92. Then, the PLC controller 2 controls the semiconductor refrigeration plate 20 to work. The semiconductor refrigeration plate 20 will rapidly reduce the temperature in the refrigeration box 92, and under the action of the air flow blown out by the air outlet head 19, the temperature of the drag chain component can be rapidly reduced. When the semiconductor refrigeration plate 20 has worked for a set time, the PLC controller 2 controls the semiconductor refrigeration plate 20 to stop working, and controls the second linear motor 6 to drive the drag chain component to move to the left and detach from the refrigeration box 92.

[0038] The operator takes out the pretreated drag chain component from the net cover 7, and then places the drag chain component with the side to be tested facing down on the top of the positioning box 392, and then presses the drag chain component along the limit seat 49. The drag chain component will press down a certain number of positioning rods according to its shape, so that the positioning rods drive the positioning blocks 42 to move downward to the set distance, and then place the drag chain component between the two clamping blocks 26, and then control the servo motor 27 to work through the external button. The servo motor 27 drives the threaded rod 212 to rotate, and drives the two threaded cylinders 22 to move in the direction of approaching each other through threaded cooperation. The threaded cylinder 22 drives the clamping cylinder 24, the clamping rod 25 and the clamping block 26 to move in the direction of approaching each other through the bent rod 23, and uses the clamping block 26 to clamp the drag chain component. When the clamping block 26 and the drag chain component come into contact, there will be a gap between the clamping block 26 and the drag chain component. An interaction force is generated, and the clamping block 26 stops moving under the action of the interaction force. The clamping block 26 drives the conductive block 28 to stop moving through the clamping rod 25, and the conductive plate 29 continues to move under the action of the clamping cylinder 24, so that the conductive block 28 and the conductive plate 29 slide against each other until the conductive block 28 and the conductive plate 29 are separated. The conductive block 28 is electrically connected to the external power supply, and the conductive plate 29 is electrically connected to the positive circuit of the servo motor 27. When the conductive block 28 and the conductive plate 29 are separated, the circuit of the servo motor 27 is disconnected, so that the clamping block 26 stops moving. At this time, a suitable clamping force is maintained between the clamping block 26 and the drag chain component. While ensuring the clamping stability of the drag chain component, it also avoids the problem of excessive clamping force on the drag chain component, which causes changes in the internal stress of the drag chain, thereby affecting the hardness test results.

[0039] Then the operator sends a control instruction to the PLC controller 2 through the operation interface. After receiving the instruction, the PLC controller 2 first controls the fourth linear motor 50 to work. The fourth linear motor 50 will drive the micro electric push rod 31 to move to the left, and the micro electric push rod 31 will drive the positioning plate 43 to move to the left together. When the positioning plate 43 moves to the left and contacts the positioning block 42 that was previously pressed down, the positioning plate 43 is electrically connected to the external power supply, and the positioning block 42 is electrically connected to the PLC controller 2. When the positioning plate 43 contacts the positioning block 42, an electrical signal is sent to the PLC controller 2. After receiving the electrical signal, the PLC controller 2 first controls the fourth linear motor 50 to stop working. Then the PLC controller 2 controls the micro electric push rod 31 to work, so that the micro electric push rod 31 drives the pressure rod 32 to move downward. When the pressure rod 32 contacts the surface of the drag chain component, it will stop moving under the action of the reaction force. At this time, the PLC controller 2 will control the micro electric push rod 31 applies the set force downward for ten seconds. After the pressure rod 32 contacts the surface of the drag chain component, it will press a dent on the surface of the drag chain component under the action of the set force. The smaller the hardness of the drag chain component, the deeper the dent. During the downward pressing process, the pressure rod 32 will drive the vertical cylinder 34, the lifting frame 35 and the pressure ring 36 to move downward together through the horizontal plate 33. When the pressure ring 36 contacts the drag chain component, it will immediately stop moving and remain motionless. After the pressure rod 32 presses a dent on the surface of the drag chain component, the pressure rod 32 will drive The energizing piece 37 moves downward, so that the energizing piece 37 contacts the resistor plate 38 on the surface of the lifting frame 35. The lower end of the resistor plate 38 is electrically connected to the PLC controller 2. When the energizing piece 37 contacts the resistor plate 38, an electric signal is transmitted to the PLC controller 2. The strength of the electric signal transmitted to the PLC controller 2 varies depending on the distance the energizing piece 37 moves downward. After receiving different electric signals, the PLC controller 2 displays the corresponding values ​​on the display assembly, which is convenient for the operator to record.

[0040] After the pressure rod 32 is pressed down for ten seconds, the PLC controller 2 will control the micro electric push rod 31 to retract and control the fourth linear motor 50 to continue to move to the left. When encountering another downward positioning block 42, the above steps will be repeated to perform sampling inspection on the hardness of the drag chain component. When the fourth linear motor 50 moves to the leftmost side, the PLC controller 2 will control the third linear motor 301 to drive the fourth linear motor 50 forward to the set position through the moving rod 302. Then the PLC controller 2 controls the fourth linear motor 50 to move to the right. Referring to the above principle, the hardness of the drag chain component continues to be tested. Therefore, when sampling the hardness of the drag chain component, multiple areas of the drag chain component can be automatically sampled and tested according to the shape and size of the drag chain component, avoiding the problem that the local performance deviation of the drag chain component is large, which affects the accuracy of the drag chain hardness test results.

[0041] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hardness testing device for drag chain production, comprising a testing frame (1), characterized in that: The lower side wall of the detection frame (1) is fixedly connected to a PLC controller (2), the upper side wall of the detection frame (1) is fixedly connected to a display screen structure (3), the inner wall of the detection frame (1) is fixedly connected to a placement plate (4), the upper side wall of the placement plate (4) is fixedly connected to a first linear motor (5), the output end of the first linear motor (5) is fixedly connected to a second linear motor (6), the output end of the second linear motor (6) is fixedly connected to a mesh cover (7), a component to be tested is placed in the mesh cover (7), the upper side wall of the placement plate (4) is connected to a pre-processing component (9), and the component to be tested is pre-processed by the pre-processing component (9), the right side wall of the detection frame (1) is fixedly connected to an air pump (8), the air pump (8) The air outlet end is connected to the pretreatment component (9), the upper side wall of the detection frame (1) is fixedly connected to the clamp component (21), and the component to be tested is clamped by the clamp component (21), the upper side wall of the detection frame (1) is fixedly connected to the detection component (30), the detection component (30) is electrically connected to the display screen structure (3) through the PLC controller (2), the detection component (30) includes a third linear motor (301) and a moving rod (302), the output end of the third linear motor (301) is fixedly connected to the moving rod (302), the upper end of the moving rod (302) is electrically connected to the third linear motor (301), and the output end of the third linear motor (301) is fixedly connected to the fourth linear motor (50), The output end of the fourth linear motor (50) is fixedly connected to a micro electric push rod (31), the output end of the micro electric push rod (31) is fixedly connected to a pressure rod (32), the left and right sides of the pressure rod (32) are fixedly connected to a horizontal plate (33), the lower side wall of the horizontal plate (33) is fixedly connected to a vertical cylinder (34), the upper inner wall of the vertical cylinder (34) is fixedly connected to a lifting frame (35) through a spring, the lower ends of the two lifting frames (35) extend out of the vertical cylinder (34) and are fixedly connected to the same pressure ring (36), the pressure rod (32) is located in the middle position of the pressure ring (36), the rod wall of the pressure rod (32) is fixedly connected to a power supply plate (37), the power supply plate (37) is electrically connected to an external power supply, and is located on the left side. The right side wall of the lifting frame (35) is fixedly connected to a resistor plate (38) through a transverse pin, and the lower end of the resistor plate (38) is electrically connected to the display screen structure (3) through the PLC controller (2). A positioning assembly (39) is provided above the detection assembly (30), and the positioning assembly (39) includes a vertical plate (391) and a positioning box (392). The vertical plate (391) is fixedly connected to the upper side wall of the detection frame (1), and the positioning box (392) is fixedly connected to the upper end of the vertical plate (391). The upper and lower side walls of the positioning box (392) are both provided with a plurality of jacks (40), and the same locating pin (41) is inserted into the jacks (40) located on the same straight line, and the lower end of the locating pin (41) extends out of the positioning box (392).A positioning block (42) is fixedly connected, the positioning block (42) is electrically connected to the PLC controller (2), the upper side wall of the micro electric push rod (31) is fixedly connected to a positioning plate (43), the positioning plate (43) is electrically connected to an external power supply, and the lower side wall of the positioning box (392) is fixedly connected to a plurality of friction rings (44) sleeved on the outside of the positioning pin (41).

2. A hardness testing device for drag chain production according to claim 1, characterized in that: The pretreatment component (9) includes a heating box (91) and a refrigeration box (92), wherein the heating box (91) is fixedly connected to the upper side wall of the placement plate (4), the right inner wall of the detection frame (1) is fixedly connected to the connecting frame (10), and the refrigeration box (92) is fixedly connected to the upper side wall of the connecting frame (10). The right side walls of the heating box (91) and the refrigeration box (92) are both rotatably connected to a short tube (11), and the right side walls of the heating box (91) and the refrigeration box (92) are both fixedly connected to a control motor (12), and the output end of the control motor (12) is connected to the short tube (11) through a bevel gear transmission assembly. The two short tubes (11) are rotatably connected to the same U-shaped tube (13), and the air outlet end of the air pump (8) passes through the side of the detection frame (1). The U-shaped tube (13) is provided with two control valves (14). The left end of the short tube (11) on the lower side is fixedly connected to a bent plate (15). The bent plate (15) is a hollow structure. The side wall of the bent plate (15) is fixedly connected to a plurality of heating plates (16). The side wall of the bent plate (15) close to the heating plate (16) is provided with a plurality of air outlet holes (17). The left end of the short tube (11) on the upper side is fixedly connected to an air blowing plate (18). The side wall of the air blowing plate (18) away from the short tube (11) is fixedly connected to a plurality of air outlet heads (19). The upper side wall of the refrigeration box (92) is fixedly connected to a plurality of semiconductor refrigeration plates (20). The refrigeration end of the semiconductor refrigeration plate (20) is located in the refrigeration box (92).

3. A hardness testing device for drag chain production according to claim 1, characterized in that: The clamp assembly (21) includes a working box (211) and a threaded rod (212), wherein the working box (211) is fixedly connected to the upper side wall of the detection frame (1), and the threaded rod (212) is rotatably connected to the inner wall of the working box (211), and the rod wall of the threaded rod (212) is threadedly sleeved with two threaded cylinders (22), and the left and right sides of the threaded rod (212) have opposite threads, and the upper side walls of the two threaded cylinders (22) are fixedly connected with a bent rod (23), and the upper side wall of the working box (211) is provided with a sliding opening that matches the bent rod (23), and the upper end of the bent rod (23) extends out of the sliding opening and is fixedly connected with a clamping cylinder (24), and the two clamping cylinders (24) are fixedly connected with a clamping cylinder through a spring. A holding rod (25), one end of the clamping rod (25) extending out of the clamping cylinder (24) is fixedly connected to a clamping block (26), a placement table located on the upper side wall of the working box (211) is provided between the two clamping blocks (26), a servo motor (27) is fixedly connected to the right side wall of the working box (211), an output end of the servo motor (27) passes through the side wall of the working box (211) and is fixedly connected to the threaded rod (212), a conductive block (28) is fixedly connected to the left side wall of the clamping rod (25) on the left side, the conductive block (28) is electrically connected to an external power supply, and a conductive plate (29) is embedded in the inner wall of the clamping cylinder (24) on the left side, the conductive plate (29) is electrically connected to the positive circuit of the servo motor (27).

4. A hardness testing device for drag chain production according to claim 1, characterized in that: The positioning pin (41) is located in a rod wall fixing sleeve in the positioning box (392) and is provided with a connecting ring (45). The upper side wall of the positioning box (392) is fixedly connected to a homing electric push rod (46). The output end of the homing electric push rod (46) is fixedly connected to a porous plate (47). The lower end of the positioning pin (41) passes through the porous plate (47).

5. A hardness testing device for drag chain production according to claim 1, characterized in that: An electric fan (48) is fixedly connected to the lower side wall of the detection frame (1), and the electric fan (48) is located above the plurality of semiconductor refrigeration plates (20).

6. A hardness testing device for drag chain production according to claim 1, characterized in that: The upper side wall of the positioning box (392) is fixedly connected to a limiting seat (49), and the limiting seat (49) is located on the right side of the plurality of positioning pins (41).

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