Large-diameter steel cord welding point on-line tension detection device
By designing an online tensile testing device, a load-bearing plate and clamps are used to fix the steel cord. A force sensor and a servo motor drive the lead screw to achieve high-precision testing of the welding points of large-diameter steel cords. This solves the problem that conventional equipment cannot detect, and ensures the testing accuracy and the quality of the steel cords.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN KEYU ELECTRIC APPLIANCES
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing technologies cannot effectively detect the tensile strength of welded joints in large-diameter steel cords. Conventional tensile testing equipment is not applicable, which makes it impossible to guarantee the quality of the welded joints, and the testing process may damage the steel cords.
Design an online tensile testing device for welded joints of large-diameter steel cord. The device uses a load-bearing plate to wind the steel cord and fix it with a clamp. It utilizes a force sensor and a servo motor to drive a lead screw to achieve uniform tensile force distribution, ensuring testing accuracy and steel cord quality.
It enables online detection of welded joints of large-diameter steel cords, with high detection accuracy and no damage to the steel cords, meeting quality requirements, adapting to steel cords of different diameters, and providing safety protection functions.
Smart Images
Figure CN224341345U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel cord manufacturing technology, specifically to an online tensile testing device for welded joints of large-diameter steel cords. Background Technology
[0002] Steel cord is mainly used as a reinforcing material for passenger car tires, light truck tires, heavy-duty truck tires, construction machinery tires, aircraft tires, and other rubber products. With the needs of social development, large-diameter steel cord (2-6mm in diameter) has become the mainstream product in the market. Missing or broken wires that occur during steel cord production are repaired using steel cord butt welding machines. The tensile strength of the welded joints must meet the user's requirements; otherwise, complaints and fines will result.
[0003] Currently, steel cord production processes only allow for sampling of welded joints for laboratory testing using conventional tensile testing equipment. This cannot guarantee the quality of welded joints used by users. Furthermore, conventional tensile testing equipment can only test steel cords with diameters below 2mm, and is not suitable for large-diameter steel cords of 2-6mm. Therefore, there is an urgent need to design an online tensile testing device for large-diameter steel cord welded joints that can perform online tensile testing on welded joints of 2-6mm diameter steel cords without damaging the quality of the steel cord, thus meeting the needs of steel cord production. Utility Model Content
[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an online tensile testing device for welding points of large-diameter steel cords. This device can perform online tensile testing on large-diameter steel cords. It uses a bearing plate to wind the large-diameter steel cords and sets a clamp on the outside of the bearing plate to clamp the large-diameter steel cords, ensuring uniform tensile force distribution and high testing accuracy during the testing process. The large-diameter steel cords do not deform or get damaged after being subjected to force, thus meeting the quality requirements of steel cord products.
[0005] The purpose of this utility model is achieved as follows:
[0006] An online tensile testing device for welded joints of large-diameter steel cord includes a frame, a transmission support frame, a fixed support seat, a movable support seat, a support plate, a clamp, and a force sensor. The fixed support seat and the movable support seat are located on the front side of the frame and are positioned left and right. The fixed support seat and the transmission support frame are fixedly mounted on the frame, while the movable support seat is movably mounted on the transmission support frame. Support plates are fixed to both the fixed and movable support seats. Each support plate has a circumferentially arranged spiral arc groove for winding the steel cord. Clamps for clamping the steel cord are located on the outer sides of the two support plates, and the two clamps are respectively mounted on the fixed and movable support seats. One end of the force sensor is fixed to the transmission support frame, and the other end is connected to the fixed support seat.
[0007] Preferably, the movable support seat is driven to move left and right by a lead screw, the lead screw is rotatably mounted on the transmission support frame through bearings, the lead screw is driven to rotate by a servo motor, the servo motor is built into the frame, the servo motor is connected to the lead screw through a synchronous pulley, and the movable support seat is provided with a nut block corresponding to the lead screw.
[0008] Preferably, the lead screw has parallel linear bearing shafts on its upper and lower sides, the movable bearing seat is slidably fitted on the linear bearing shafts, and the movable bearing seat has a shaft hole corresponding to the linear bearing shaft.
[0009] Preferably, a connecting block is provided on the back of the fixed bearing seat corresponding to the force sensor.
[0010] Preferably, the clamp includes an eccentric cam handle, a force-bearing column, an upper pressure hand, an adjusting screw, a connecting block, an upper pressure block, a lower clamp seat, and clamping plates. The rear of the upper pressure hand is hinged to a fixed support seat or a movable support seat, the middle of which is provided with a force-bearing column, and the front of which is rotatably provided with an adjusting screw. The adjusting screw is screwed to the connecting block, and the connecting block is connected to the upper pressure block. The lower clamp seat is fixed to the front side of the fixed support seat or the movable support seat, and clamping plates are respectively inserted into the upper pressure block and the lower clamp seat.
[0011] Preferably, the upper part of the connecting block is slidably disposed in the sliding groove at the front of the upper pressure hand, the connecting block is provided with an internal thread corresponding to the adjusting screw, and the lower part of the connecting block is connected to the upper pressure block.
[0012] Preferably, the force-bearing column is disposed in the pressure-bearing cavity at the upper part of the upper pressure hand, the force-bearing column is matched with the cam of the eccentric cam handle, the eccentric cam handle is mounted on the force-bearing column, and the eccentric cam handle is hinged to the top of the fixed bearing seat or the movable bearing seat through the support ear seat.
[0013] Preferably, the upper pressure block and the lower clamping plate seat are provided with dovetail grooves for the corresponding clamping plates, and the steel cord is arranged between the two clamping plates arranged above and below.
[0014] Preferably, the top of the frame is provided with a program setting screen and a safety guard. The program setting screen can set relevant parameters according to the welding points of steel cords of different specifications. The safety guard is hinged to the middle of the frame and located directly above the welding points of the steel cords.
[0015] Preferably, the frame is also equipped with a power switch and a power input socket, and casters are provided at the four corners of the bottom of the frame.
[0016] The beneficial effects of this utility model are:
[0017] The weld point of the steel cord to be tested is set between two support plates. The steel cord on both sides of the weld point is wound into the spiral arc groove on the support plate. After winding, the two ends of the steel cord are placed into the clamps set on the left and right respectively. Under the action of the eccentric cam handle, the steel cord is clamped. The steel cord is clamped without damaging it, so that it will not move or loosen during the tensile test. After the steel cord is clamped and fixed, the test parameters are set on the program setting screen. Press the start button, the servo motor drives the lead screw to rotate, and the moving support plate moves to the right, so that the weld point of the steel cord is subjected to force. The force sensor installed on the fixed support plate is also subjected to force at the same time, so that the force sensor outputs a tensile signal. The PLC receives the signal and, under the control of the input parameters, performs effective testing of the weld point of the steel cord. After the test is qualified, it automatically resets and stops.
[0018] The upper pressure block and the lower clamping plate seat adopt dovetail groove insertion clamping plates. The clamping plates are inserted into the dovetail groove from front to back, which greatly improves the replacement speed of the clamping plates. At the same time, an adjusting screw is set to adjust the distance between the upper and lower clamping plates, which can adapt to steel cords of different diameters and has strong versatility.
[0019] The safety guard is hinged to the middle of the frame, directly above the steel cord welding point. When not being inspected or clamped, it can be flipped up; when being inspected, it should be closed down to prevent the steel cord welding point from breaking and injuring people if it fails to meet the standards. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of an online tensile testing device for welding points of large-diameter steel cord according to the present invention.
[0021] Figure 2 This is a schematic diagram of the assembly structure of the transmission support frame.
[0022] Figure 3 This is a schematic diagram of the assembly structure of the movable support seat.
[0023] Figure 4 This is a schematic diagram of the assembly structure of the clamp on the movable support seat.
[0024] Figure 5 for Figure 3 Rear view.
[0025] Figure 6 This is a schematic diagram of the assembly structure for fixing the load-bearing seat.
[0026] Figure 7 for Figure 6 Rear view.
[0027] Figure 8 This is a side view of the load-bearing plate.
[0028] Figure 9 This is a schematic diagram of the assembly structure of the clip.
[0029] in:
[0030] Frame 1; Transmission support frame 2; Fixed support seat 3; Connecting block 3.1; Moving support seat 4; Nut block 4.1; Support plate 5; Helical arc groove 5.1; Clamp 6; Eccentric cam handle 6.1; Force column 6.2; Upper pressure handle 6.3; Adjusting screw 6.4; Connecting block 6.5; Upper pressure block 6.6; Lower clamp seat 6.7; Clamp 6.8; Support ear seat 6.9; Force sensor 7; Lead screw 8; Synchronous pulley 9; Linear bearing shaft 10; Program setting screen 11; Safety guard 12; Power switch 13; Power inlet socket 14; Caster wheel 15. Detailed Implementation
[0031] See Figure 1-9 This utility model relates to an online tensile testing device for welded joints of large-diameter steel cord, comprising a frame 1, a transmission support frame 2, a fixed support seat 3, a movable support seat 4, a support plate 5, a clamp 6, and a force sensor 7. The frame 1 has a fixed support seat 3 and a movable support seat 4 on its front side, arranged left and right. The fixed support seat 3 is fixed to the frame 1, and the movable support seat 4 is driven to move left and right by a lead screw 8. The lead screw 8 is rotatably mounted on the transmission support frame via bearings. On the force frame 2, the transmission force frame 2 is fixed to the front side of the frame 1. The lead screw 8 is driven to rotate by a servo motor, which is built into the frame 1. The servo motor is connected to the lead screw 8 through a synchronous pulley 9. The movable support seat 4 is provided with a nut block 4.1 corresponding to the lead screw 8. In order to make the movable support seat 4 move smoothly, the upper and lower sides of the lead screw 8 are provided with parallel linear bearing shafts 10. The movable support seat 4 is slidably fitted on the linear bearing shafts 10. The movable support seat 4 is provided with a shaft hole corresponding to the linear bearing shafts 10.
[0032] The fixed support base 3 and the movable support base 4 are respectively fixed with support plates 5 by screws. The support plates 5 are provided with spiral arc grooves 5.1 around their circumference for winding steel cord. The design of the spiral arc grooves 5.1 increases the friction between the steel cord and the contact surface of the support plate 5, preventing slippage or slippage, ensuring that the tension is fully applied to the welding point, and at the same time evenly distributing the tension to prevent stress concentration and avoid detection errors caused by improper winding and clamping. The spiral arc grooves of the support plates on the fixed support base are left-handed, while the spiral arc grooves of the support plates on the movable support base are right-handed. During the testing process, the steel cord will not deform under force and will not be damaged, thus meeting the quality requirements of the steel cord products.
[0033] One end of the force sensor 7 is fixed on the transmission support frame 2, and the other end is connected to the fixed support seat 3. The back of the fixed support seat 3 is provided with a connecting block 3.1 corresponding to the force sensor 7. When the fixed support seat 3 is subjected to force, the force sensor 7 outputs a data signal, and the entire detection process is controlled by the PLC program.
[0034] The fixed support seat 3 and the movable support seat 4 are respectively equipped with clamps 6 that can be quickly changed clamping plates. The clamps 6 are located on the outside of the corresponding support plates 5. The clamps 6 include an eccentric cam handle 6.1, a force-bearing column 6.2, an upper pressure handle 6.3, an adjusting screw 6.4, a connecting block 6.5, an upper pressure block 6.6, a lower clamping plate seat 6.7, and a clamping plate 6.8. The upper pressure handle 6.3 is hinged to the fixed support seat 3 or the movable support seat 4 at the rear, has a force-bearing column 6.2 in the middle, and an adjusting screw 6.4 rotatably mounted at the front. A screw-connecting block 6.5 is slidably fitted into a groove at the front of the upper pressure handle 6.3 at its upper part, and connected to an upper pressure block 6.6 at its lower part. A force-bearing column 6.2 is located in the pressure-bearing cavity in the middle of the upper pressure handle 6.3. The force-bearing column 6.2 matches the cam of the eccentric cam handle 6.1, which is mounted on the force-bearing column 6.2. The eccentric cam handle 6.1 is hinged to the top of the fixed support seat 3 or the movable support seat 4 via a support lug 6.9. The eccentric cam handle can be moved forward. Handle 6.1, the eccentric cam handle 6.1 pushes the force-bearing column 6.2 and the upper pressure hand 6.3 to press the steel cord downward with the rear hinge point as the center. The lower clamping plate seat 6.7 is fixed to the front side of the fixed support seat 3 or the movable support seat 4. The upper pressure block 6.6 and the lower clamping plate seat 6.7 are respectively inserted into the clamping plates 6.8. The upper pressure block 6.6 and the lower clamping plate seat 6.7 are provided with dovetail grooves for the corresponding clamping plates. The steel cord is placed between the two clamping plates 6.8 set above and below. The clamping plates 6.8 are made of copper to avoid additional damage caused by improper clamping. As a consumable part, clip 6.8 needs to be replaced frequently. The upper pressure block 6.6 and the lower clip seat 6.7 use dovetail grooves to insert clip 6.8. The clip is inserted into the dovetail groove from front to back, which greatly improves the replacement speed of the clip. At the same time, an adjusting screw 6.4 is provided to adjust the distance between the upper and lower clips 6.8 (rotating the handle on the top of the adjusting screw 6.4 will drive the connecting block 6.5 and the upper pressure block 6.6, and the clip 6.8 inserted with the upper pressure block 6.6 to move up and down). It can adapt to steel cords of different diameters and has strong versatility.
[0035] The top of the frame is equipped with a program setting screen 11 and a safety guard 12. The program setting screen 11 can set relevant parameters according to the welding points of steel cords of different specifications. The safety guard 12 is hinged to the middle of the frame 1 and located directly above the welding point of the steel cord. When not being inspected and clamped, it can be flipped up. When being inspected and clamped, it can be covered down to prevent the steel cord welding point from breaking and injuring people if it does not meet the standard.
[0036] In addition, the frame 1 is also equipped with a power switch 13 and a power inlet socket 14. To facilitate equipment movement, casters 15 are also provided at the four corners of the bottom of the frame 1, which greatly improves the flexibility of the device.
[0037] The weld point of the steel cord to be tested is set between two support plates 5. The steel cord on both sides of the weld point is wound into the spiral arc groove 5.1 on the support plate 5. After winding, the two ends of the steel cord are placed into the clamps 6 set on the left and right respectively. Under the action of the eccentric cam handle 6.1, the steel cord is clamped. The steel cord is clamped without damaging it, so that it will not move or loosen during the tensile test. After the steel cord is clamped and fixed, the test parameters are set on the program setting screen 11. The start button is pressed, the servo motor drives the lead screw to rotate, and the moving support plate 4 moves to the right, so that the weld point of the steel cord is subjected to force. The force sensor 7 installed on the fixed support plate 3 is also subjected to force at the same time, so that the force sensor 7 outputs a tensile signal. The PLC receives the signal and, under the control of the input parameters, performs effective testing of the weld point of the steel cord. After the test is qualified, it automatically resets and stops.
[0038] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.
Claims
1. An online tensile testing device for welded joints of large-diameter steel cord, characterized in that: The device includes a frame, a transmission support frame, a fixed support seat, a movable support seat, a support plate, clamps, and a force sensor. The fixed support seat and the movable support seat are located on the front side of the frame and are arranged on the left and right sides. The fixed support seat and the transmission support frame are fixedly mounted on the frame, and the movable support seat is movably mounted on the transmission support frame. A support plate is fixed on each of the fixed support seat and the movable support seat. The support plate has a spiral arc groove around its circumference for winding steel cord. Clamps for clamping steel cord are provided on the outer side of the two support plates. The two clamps are respectively mounted on the fixed support seat and the movable support seat. One end of the force sensor is fixed on the transmission support frame, and the other end is connected to the fixed support seat.
2. The online tensile testing device for large-diameter steel cord welding points according to claim 1, characterized in that: The movable support seat is driven to move left and right by a lead screw. The lead screw is rotatably mounted on the transmission support frame through bearings. The lead screw is driven to rotate by a servo motor, which is built into the frame. The servo motor is connected to the lead screw through a synchronous pulley. The movable support seat is provided with a nut block corresponding to the lead screw.
3. The online tensile testing device for large-diameter steel cord welding points according to claim 2, characterized in that: The lead screw is provided with parallel linear bearing shafts on its upper and lower sides, and the movable bearing seat is slidably fitted on the linear bearing shaft. The movable bearing seat is provided with a shaft hole corresponding to the linear bearing shaft.
4. The online tensile testing device for large-diameter steel cord welding points according to claim 1, characterized in that: The fixed support seat has a connecting block on its back corresponding to the force sensor.
5. The online tensile testing device for large-diameter steel cord welding points according to claim 1, characterized in that: The clamp includes an eccentric cam handle, a force-bearing column, an upper pressure handle, an adjusting screw, a connecting block, an upper pressure block, a lower clamp seat, and clamping plates. The rear of the upper pressure handle is hinged to a fixed support seat or a movable support seat. A force-bearing column is provided in the middle, and an adjusting screw is rotatably provided in the front. The adjusting screw is screwed to the connecting block. The connecting block is connected to the upper pressure block. The lower clamp seat is fixed to the front side of the fixed support seat or the movable support seat. The upper pressure block and the lower clamp seat are respectively inserted into clamping plates.
6. The online tensile testing device for large-diameter steel cord welding points according to claim 5, characterized in that: The upper part of the connecting block is slidably installed in the sliding groove at the front of the upper pressure hand, and the connecting block has an internal thread corresponding to the adjusting screw. The lower part of the connecting block is connected to the upper pressure block.
7. The online tensile testing device for large-diameter steel cord welding points according to claim 5, characterized in that: The force-bearing column is located in the pressure-bearing cavity at the upper part of the upper presser. The force-bearing column matches the cam of the eccentric cam handle. The eccentric cam handle is mounted on the force-bearing column. The eccentric cam handle is hinged to the top of the fixed bearing seat or the movable bearing seat through the support lug.
8. The online tensile testing device for large-diameter steel cord welding points according to claim 5, characterized in that: The upper pressure block and the lower clamping plate seat are provided with dovetail grooves for the corresponding clamping plates, and the steel cord is arranged between the two clamping plates arranged above and below.
9. The online tensile testing device for large-diameter steel cord welding points according to claim 1, characterized in that: The top of the frame is equipped with a program setting screen and a safety guard. The program setting screen can set relevant parameters according to the welding points of steel cords of different specifications. The safety guard is hinged to the middle of the frame and located directly above the welding points of the steel cords.
10. The online tensile testing device for large-diameter steel cord welding points according to claim 1, characterized in that: The rack is also equipped with a power switch and a power inlet socket, and casters are provided at the four corners of the bottom of the rack.