A harness resistance welding cable stripping apparatus and method

Abstract

The application discloses a kind of cable stripping equipment and method for harness resistance welding, adopt the local cutting groove of upper and lower cutting knives to cable outer skin, non-full cutting cutting mode of reservation two sides outer skin connecting layer, with synchronous belt driving outer skin circumferential torsion stripping, simultaneously by cylinder driving integral mechanism axial push, realize rotary stripping and axial peeling synchronization linkage.The application effectively solves the problem that traditional stripping process is easy to scratch wire core, and the problem that wire core is deformed due to pulling, avoids stripping misplacement, air cutting and other adverse defects, ensures that the wire core end after stripping is neat and consistent, significantly improves the quality and production stability of subsequent harness resistance welding.

Description

Technical Field

[0001] This invention relates to the field of wire harness stripping equipment technology, and in particular to a wire harness resistance welding cable stripping equipment and method. Background Technology

[0002] In automated production lines for resistance welding of wire harnesses, cable stripping is a critical pre-welding process, and its quality directly affects the stability of subsequent core melting and resistance welding. Existing cable stripping equipment is mainly divided into two categories: circumferential cutting and dragging type, and rotary stripping type. Conventional circumferential cutting and dragging stripping mechanisms first use a cutter to cut the cable sheath as a whole, and then rely on a clamping mechanism to axially pull the sheath to achieve stripping. During direct axial dragging, the multi-strand cores are easily subjected to tensile force, resulting in fraying, twisting, and deformation, and poor uniformity in the formation of the bare wire ends. Traditional rotary stripping equipment mostly cuts the entire circumference of the sheath before rotating and stripping, and the cutter is prone to damaging the internal multi-strand cores during cutting. Furthermore, some equipment has independent timing sequences for the rotation and axial dragging actions, making it impossible to coordinate synchronously. This can easily cause localized jamming of the sheath during the stripping process, resulting in defects such as stripping length deviation and residual sheath.

[0003] Meanwhile, existing wire stripping mechanisms lack precise detection and linkage control for cable end positioning, making it easy for stripping to start before the cable is properly fed in, resulting in stripping position deviation and waste. Furthermore, the upper and lower clamping and cutting mechanisms often use independent drive control, leading to cumbersome structures and difficulties in synchronous control. These problems result in unstable wire end shapes after stripping, directly affecting subsequent resistance welding processes and easily causing defects such as incomplete soldering and fluctuations in welding resistance. Summary of the Invention

[0004] The technical problem to be solved by this invention is that stripping the wires can easily damage the wire cores and cause the wire cores to become fraying after stripping, which in turn affects the quality of subsequent resistance welding.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a cable stripping device for wire harness resistance welding, comprising a horizontally sliding movable frame and a vertically sliding lifting seat arranged at the top and bottom of the movable frame, the two lifting seats being arranged opposite each other, a cable cutting blade being arranged between the lifting seats, and a synchronous belt for clamping the cable being arranged between the cutting blade and the lifting seat, the synchronous belts on the two lifting seats rotating in the same direction.

[0006] Preferably, photoelectric sensors are provided on the opposite sidewalls of the two lifting seats, and the photoelectric sensors are positioned directly opposite the corresponding cables.

[0007] Preferably, the movable frame is horizontally slidably connected to the mounting frame, a cylinder is fixed on the mounting frame, the output end of the cylinder is fixedly connected to the movable frame, and the photoelectric sensor signal is connected to the cylinder controller.

[0008] Preferably, guide rods are horizontally fixedly connected to both the top and bottom of the movable frame, and the guide rods are horizontally slidably connected to the mounting frame.

[0009] Preferably, a lead screw is vertically arranged on the movable frame, with the spiral directions at both ends of the lead screw being opposite. Two lifting seats are respectively threaded to both ends of the lead screw. A lifting motor for driving the lead screw to rotate is installed at the bottom of the movable frame. A sliding groove is provided on the side wall of the movable frame, and a slider is fixedly connected to the lifting seat. The slider is slidably disposed in the sliding groove.

[0010] Preferably, a blade holder is fixedly installed on the lifting seat, and the cutting blade is detachably connected to the blade holder. The cutting blade, the timing belt, and the lifting seat are all at the same height on the same side facing the cable.

[0011] Preferably, the outer sidewall of the synchronous belt is provided with friction texture.

[0012] Preferably, a frame is fixedly installed on the side wall of the lifting seat, and synchronous pulleys are rotatably installed at both ends of the frame. The synchronous belt is rotatably connected between the two synchronous pulleys, and a peeling motor is fixedly installed on the outside of the frame. The peeling motor drives the synchronous pulleys.

[0013] A method for stripping the insulation of cables used in resistance welding of wire harnesses, using the aforementioned stripping device, includes the following steps: Step 1: The cable to be processed is conveyed to the stripping station, and the photoelectric sensor detects the signal that the cable end is in place; Step 2: The lifting motor drives the lead screw to rotate, causing the upper and lower lifting seats to move closer together, and the synchronous belt clamps the outer wall of the cable. Step 3: The lifting platform continues to feed, causing the upper and lower cutting blades to close together and cut at the top and bottom of the cable sheath, leaving only the remaining parts on both sides of the cable. Step 4: Step 1: The cable to be processed is conveyed to the stripping station. The photoelectric sensor detects in real time whether the cable end is in place. Once in place, the system triggers the stripping process start signal. Step 2: The lifting motor drives the lead screw to rotate, causing the upper and lower lifting seats to close in opposite directions, so that the upper and lower synchronous belts are tightly attached to and clamped on the outer wall of the cable sheath, thus completing the radial positioning and fixing of the cable. Step 3: The lifting seat continues to feed slightly in opposite directions, driving the upper and lower cutting blades to press into the upper and lower surfaces of the cable sheath respectively. Only the upper and lower sides of the cable sheath are partially cut, preserving the connecting layer of the cable sheath on the left and right sides. The outer sheath is not completely cut off to avoid the blades damaging the internal wire core. Step 4: The stripping motor drives the upper and lower synchronous belts to rotate in the same direction. Relying on friction, the cable sheath is continuously twisted circumferentially, causing the uncut outer sheath connecting layers on both sides to fatigue and break under the torsion, thus achieving circumferential peeling of the sheath from the wire core. At the same time, the cylinder synchronously drives the moving frame to move horizontally axially, pushing the sheath axially during the synchronous process of rotating and peeling off the sheath, realizing synchronous linkage of rotational peeling and axial sheath removal, and smoothly removing the entire sheath from the surface of the wire core. Step 5: After the outer sheath is completely peeled off, all mechanisms are reset to complete the non-destructive stripping operation of the cable end, obtaining a neat, unbroken, and unstretched bare wire core for subsequent resistance welding.

[0014] Preferably, when the photoelectric sensor does not detect the cable end arrival signal, the controller locks the cylinder, lifting motor, and stripping motor to prevent the stripping action from being performed; after stripping is completed, the lifting motor drives the lifting seats to move away from each other in the opposite direction, releases the cable, and waits for the next cable to be fed.

[0015] This invention provides a cable stripping device and method for resistance welding of wire harnesses, which has the following beneficial effects.

[0016] 1. This equipment is equipped with a bidirectional reverse screw drive that drives the upper and lower lifting seats to move synchronously in opposite directions. It relies on two sets of synchronous belts rotating in the same direction to clamp the cable and complete the outer sheath cutting with the cutting blade. The synchronous rotation of the upper and lower synchronous belts drives the outer sheath to rotate circumferentially, while the cylinder drives the overall mechanism to move axially, realizing the synchronous operation of rotational stripping and axial pushing. During the stripping process, the wire core is not pulled in one direction, which effectively avoids the twisting and fraying of multi-strand wire cores, ensuring that the bare wire end is neat after stripping and improving the quality of subsequent resistance welding.

[0017] 2. The cutting blade only cuts the top and bottom of the cable sheath, preserving the connecting areas on both sides of the sheath. It does not completely sever the sheath, preventing the cutting blade from overfeeding and scratching the internal wire core, thus reducing the scrap rate of the wire. Combined with the rotation and axial synchronous pushing modes, the stripping is completed smoothly during the gradual twisting and tearing of the sheath, making the stripping process gentler.

[0018] 3. Photoelectric sensors are installed on the opposite side walls of the lifting platform to detect the cable end positioning status in real time. The sensor signals are linked with the controllers of each actuator. If the cable is not in position, the entire stripping process is locked to prevent empty cutting and stripping position deviation, thus improving the stability of equipment operation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural side view of an embodiment of the present invention.

[0020] Figure 2 This is a structural front view of an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the synchronous belt structure in an embodiment of the present invention.

[0022] In the diagram: 1. Fixed frame; 2. Cable; 3. Moving frame; 4. Lead screw; 5. Lifting seat; 6. Slider; 7. Lifting motor; 8. Tool holder; 9. Cutting blade; 10. Synchronous belt; 11. Peeling motor; 12. Photoelectric sensor; 13. Cylinder; 14. Slide groove; 15. Synchronous pulley; 16. Frame. Detailed Implementation

[0023] like Figure 1-3 As shown, this invention discloses a cable stripping device for resistance welding of wire harnesses, including a mounting frame 1. A movable frame 3 is horizontally slidably mounted on the mounting frame 1. A cylinder 13 is fixedly mounted on the mounting frame 1, and the output end of the cylinder 13 is fixedly connected to the movable frame 3 for driving the movable frame 3 to move horizontally and reciprocally. Guide rods are fixedly mounted on the top and bottom of the movable frame 3, and the guide rods slide horizontally with the mounting frame 1 to guide and limit the horizontal movement of the movable frame 3, ensuring smooth and vibration-free movement.

[0024] like Figure 1 and Figure 2 As shown, a lead screw 4 is vertically mounted on the movable frame 3. The spiral directions at both ends of the lead screw 4 are opposite. Lifting seats 5 are threaded onto the upper and lower ends of the lead screw 4, and the two lifting seats 5 are arranged facing each other. A lifting motor 7 is fixedly mounted at the bottom of the movable frame 3. The output shaft of the lifting motor 7 is connected to the lead screw 4 for driving the lead screw 4 to rotate in both directions. A vertically arranged slide groove 14 is opened on the side wall of the movable frame 3. A slider 6 is fixed inside the lifting seat 5 and slides inside the slide groove 14 to achieve smooth vertical sliding of the lifting seat 5 along the movable frame 3. Through the transmission characteristics of the bidirectional reverse lead screw 4, the upper and lower sets of lifting seats 5 can be synchronously closed or separated in opposite directions to ensure the synchronicity of clamping and cutting actions.

[0025] like Figure 1 and Figure 2 As shown, blade holders 8 are fixedly installed on the opposite side walls of both sets of lifting seats 5. Cutting blades 9 are detachably installed on the blade holders 8, and the detachable structure facilitates the replacement of appropriate blades according to different cable specifications. A frame 16 is fixedly installed on the side wall of the lifting seat 5. Synchronous pulleys 15 are rotatably installed at both ends of the frame 16. A synchronous belt 10 is sleeved between the two synchronous pulleys 15. The outer wall of the synchronous belt 10 is provided with anti-slip friction texture, which can effectively increase the friction with the cable sheath and prevent slippage. A stripping motor 11 is fixedly installed on the outside of the frame 16. The stripping motor 11 is connected to the synchronous pulleys 15 for transmission and is used to drive the synchronous belt 10 to rotate cyclically. The rotation directions of the upper and lower sets of synchronous belts 10 are completely consistent.

[0026] In this embodiment, the cutting blade 9 and the timing belt 10 are at the same height on the side facing the cable 2, ensuring that the clamping point and the cutting point correspond precisely and avoiding radial offset during cable processing. Photoelectric sensors 12 are installed on the opposite sidewalls of the two lifting seats 5. The photoelectric sensors 12 are positioned directly opposite the conveying path of the cable 2, and are connected to the controller signals of the cylinder 13, the lifting motor 7, and the stripping motor 11 to achieve interlocking of the processes.

[0027] This invention also discloses a method for stripping the insulation of cables used in resistance welding of wire harnesses. The stripping equipment described above is used to complete the operation, and the specific implementation steps are as follows: Step 1, Cable feeding and positioning: The cable 2 to be processed is conveyed to the stripping station along the conveying path. The photoelectric sensor 12 detects the position of the end of the cable 2 in real time. Only when the end of the cable 2 is detected to be in precise position will the system trigger the stripping process start signal to prevent misaligned processing.

[0028] Step 2, Cable Adaptive Clamping: The lifting motor 7 drives the lead screw 4 to rotate in the forward direction, causing the upper and lower lifting seats 5 to synchronously close in opposite directions, so that the upper and lower synchronous belts 10 tightly clamp the outer wall of the cable 2, completing the radial positioning and fixing of the cable 2, and preventing the cable from shifting or moving during processing.

[0029] Step 3, partial grooving of cable sheath: The lifting seat 5 continues to feed slightly in opposite directions, driving the upper and lower sets of cutting blades 9 to press and cut into the upper and lower surfaces of the cable sheath 2 respectively. Only the upper and lower sides of the cable sheath are partially grooved, preserving the connecting layers of the sheath on the left and right sides of the cable 2. The sheath is not completely cut around the circumference, thus avoiding excessive feeding of the cutting blades 9 and scratching the internal multi-strand wire cores from the root.

[0030] Step 4, Rotation and Twist + Axial Synchronous Stripping: The stripping motor 11 starts, driving the upper and lower synchronous belts 10 to rotate in the same direction. Relying on the friction between the synchronous belts 10 and the outer sheath, the outer sheath of the cable 2 is continuously twisted circumferentially, causing fatigue fracture of the uncut outer sheath connecting layers on both sides, thus completing the circumferential stripping of the outer sheath from the wire core. At the same time, the cylinder 13 synchronously drives the moving frame 3 to move horizontally axially, synchronously pushing the outer sheath axially during the rotation and stripping process, realizing the linkage and synchronization of rotational stripping and axial stripping action, smoothly removing the outer sheath from the surface of the wire core, avoiding wire core fraying and twisting deformation caused by single axial pulling.

[0031] Step 5, Mechanism Reset and Continuous Operation: After the cable sheath is completely stripped, each actuator is reset in sequence, resulting in a bare wire core with neat ends, no loose strands, and no tensile deformation, which can be directly used for subsequent wire core melting and resistance welding processes.

[0032] During equipment operation, if the photoelectric sensor 12 fails to detect the cable 2 end being in position, the system will automatically lock all outputs of the cylinder 13, lifting motor 7, and stripping motor 11, prohibiting the start of clamping, cutting, and stripping processes, effectively preventing empty cutting and waste. After a single stripping operation is completed, the lifting motor 7 drives the lead screw 4 to rotate in the reverse direction, causing the two sets of lifting seats 5 to move away from each other. The synchronous belt 10 releases the processed cable 2, and the equipment automatically resets, waiting for the next cable to be fed, realizing automated continuous stripping operation.

Claims

1. A cable stripping device for resistance welding of wire harnesses, characterized in that: The device includes a horizontally sliding mobile frame (3) and vertically sliding lifting seats (5) arranged at the top and bottom of the mobile frame (3). The two lifting seats (5) are arranged opposite each other. A cutting blade (9) for cutting the cable (2) is arranged between the lifting seats (5). A timing belt (10) for clamping the cable (2) is arranged between the cutting blade (9) and the lifting seats (5). The timing belts (10) on the two lifting seats (5) rotate in the same direction.

2. The cable stripping equipment for wire harness resistance welding as described in claim 1, characterized in that: Photoelectric sensors (12) are provided on the opposite side walls of the two lifting seats (5), and the photoelectric sensors (12) are positioned directly opposite the corresponding cables (2).

3. The cable stripping equipment for wire harness resistance welding as described in claim 2, characterized in that: The movable frame (3) is horizontally slidably connected to the mounting frame (1). A cylinder (13) is fixed on the mounting frame (1). The output end of the cylinder (13) is fixedly connected to the movable frame (3). The photoelectric sensor (12) is connected to the controller of the cylinder (13).

4. The cable stripping equipment for wire harness resistance welding as described in claim 3, characterized in that: The top and bottom of the movable frame (3) are both horizontally fixedly connected with guide rods (17), and the guide rods (17) are horizontally slidably connected to the mounting frame (1).

5. The cable stripping equipment for wire harness resistance welding as described in claim 1, characterized in that: A lead screw (4) is vertically arranged on the movable frame (3). The spirals at both ends of the lead screw (4) are in opposite directions. Two lifting seats (5) are threaded to both ends of the lead screw (4). A lifting motor (7) for driving the lead screw (4) to rotate is installed at the bottom of the movable frame (3). A sliding groove (14) is provided on the side wall of the movable frame (3). A slider (6) is fixedly connected to the lifting seat (5). The slider (6) is slidably disposed in the sliding groove (14).

6. The cable stripping equipment for wire harness resistance welding as described in claim 1, characterized in that: A blade holder (8) is fixedly installed on the lifting seat (5), and the cutting blade (9) is detachably connected to the blade holder (8). The cutting blade (9), the timing belt (10), and the lifting seat (5) are all at the same height on the same side facing the cable (2).

7. The cable stripping equipment for wire harness resistance welding as described in claim 6, characterized in that: Friction patterns (18) are provided on the outer wall of the synchronous belt (10).

8. The cable stripping device for wire harness resistance welding as described in claim 6, characterized in that: A frame (16) is fixedly installed on the side wall of the lifting seat (5). Synchronous pulleys (15) are rotatably installed at both ends of the frame (16). The synchronous belt (10) is rotatably connected between the two synchronous pulleys (15). A peeling motor (11) is fixedly installed on the outside of the frame (16). The peeling motor (11) drives the synchronous pulleys (15).

9. A method for stripping the insulation of cables used in resistance welding of wire harnesses, characterized in that, The peeling device as described in any one of claims 1-8 is used, comprising the following steps: Step 1: The cable to be processed (2) is transported to the stripping station, and the photoelectric sensor (12) detects the signal that the end of the cable (2) is in place; Step 2: The lifting motor (7) drives the lead screw (4) to rotate, causing the upper and lower lifting seats (5) to move closer together, and the synchronous belt (10) clamps the outer wall of the cable (2); Step 3: The lifting seat (5) continues to feed, causing the upper and lower cutting blades (9) to close and cut the top and bottom of the cable (2) sheath, leaving only the remaining parts on both sides of the cable (2); Step 4, Step 1: The cable to be processed (2) is transported to the stripping station. The photoelectric sensor (12) detects in real time whether the end of the cable (2) is in place. After it is in place, the system triggers the stripping process start signal. Step 2: The lifting motor (7) drives the lead screw (4) to rotate, causing the upper and lower lifting seats (5) to close in opposite directions, so that the upper and lower synchronous belts (10) are tightly attached to the outer wall of the cable (2) to complete the radial positioning and fixing of the cable. Step 3: The lifting seat (5) continues to feed in small increments, driving the upper and lower cutting blades (9) to press into the upper and lower surfaces of the cable (2) sheath respectively. Only the upper and lower sides of the cable (2) sheath are partially cut, preserving the connecting layer of the cable (2) sheath on the left and right sides. The sheath is not cut in its entirety to avoid the blades damaging the internal wire core. Step 4: The stripping motor (11) drives the upper and lower synchronous belts (10) to rotate in the same direction. The friction force drives the outer sheath of the cable (2) to rotate continuously in the circumferential direction, so that the uncut outer sheath connecting layers on both sides are fatigued and broken under the torsion, thus achieving circumferential peeling of the outer sheath from the wire core. At the same time, the cylinder (13) synchronously drives the moving frame (3) to move horizontally in the axial direction. During the synchronous process of the outer sheath being rotated and rubbed off, the outer sheath is pushed axially, realizing synchronous linkage of rotational peeling and axial stripping, and smoothly removing the outer sheath from the surface of the wire core. Step 5: After the outer sheath is completely peeled off, all mechanisms are reset to complete the non-destructive stripping operation of the cable end, obtaining a neat, unbroken, and unstretched bare wire core for subsequent resistance welding.

10. The cable stripping method as described in claim 9, characterized in that: When the photoelectric sensor (12) does not detect the signal that the end of the cable (2) is in place, the controller locks the cylinder (13), the lifting motor (7), and the peeling motor (11) to prevent the peeling action from being performed. After the peeling is completed, the lifting motor (7) drives the lifting seat (5) to move away from each other, releases the cable (2), and waits for the next cable to be fed.

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