Wire harness terminal crimping method and crimping equipment thereof

Abstract

The invention relates to the technical field of conductive connection, in particular to a wire harness terminal crimping method and a crimping device thereof.The wire harness terminal crimping method comprises the following steps that a, a circle is cut on the periphery of an insulating skin at one end of a cable in the circumferential direction through a cutting tool, so that the insulating skin at one end of the cable is cut off, and the insulating skin at the other end of the cable is cut off; the cut insulation skin forms a leather sheath capable of moving on the periphery of the wire core, the axis of the cable is set to extend in the front-back direction, and the leather sheath is located at the front end of the cable and can move forwards on the periphery of the wire core; b, the leather sheath is moved forwards by a set distance, a part of the rear end of the leather sheath is sleeved outside the wire core so as to wrap the wire core, and an exposed wire core is arranged between the leather sheath and the rear uncut insulation sheath; and c, pressing a wire harness terminal outside the exposed wire core. According to the invention, the problem that the wire core is dispersed to the periphery is avoided, the crimping efficiency is improved, and tight crimping is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of conductive connection, and in particular to a wire harness terminal crimping method and a crimping device thereof. Background Art

[0002] In the field of conductive connection, whether the wiring harness terminal is tightly connected greatly affects the working state of the cable, so it is very important to crimp the wiring harness terminal tightly. In the prior art, such as the invention patent with authorization announcement number CN117810740B discloses a wiring harness terminal, a wiring harness terminal crimping device and a wiring harness terminal crimping process. Before crimping the wiring harness terminal at one end of the cable, first remove a section of the insulation at one end of the cable to expose a section of the wire core inside, and then crimp the wiring harness terminal to the outside of the wire core using a crimping device, thereby achieving a conductive connection between the wiring harness terminal and the wire core inside the cable, and the cable connected with the wiring harness terminal can be used to connect with other electrical components.

[0003] For some cables, the internal wire core is composed of many thinner metal wires. After the insulation skin on the outside of the cable is removed, the metal wires tend to spread out because they lose the tightening effect of the insulation skin. This brings difficulties to the crimping process of the wire harness terminal and easily causes the wire harness terminal to be crimped loosely, thereby reducing the crimping efficiency of the wire harness terminal and posing a hidden danger to electricity use. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention proposes a wire harness terminal crimping method and a crimping device thereof to solve the technical problems in the prior art that the metal wire is easy to spread around, making the wire harness terminal crimping difficult and the crimping is easy to be loose.

[0005] A wire harness terminal crimping method and crimping device of the present invention adopts the following technical solution: A wire harness terminal crimping method comprises the following steps: a. firstly, using a cutting tool to cut a circle along the circumferential direction around the outer periphery of the insulating skin at one end of the cable, so that the insulating skin at one end of the cable is cut off, and the cut insulating skin forms a leather sleeve that can move around the outer periphery of the wire core, and the axis of the cable is set to extend in the front-back direction, and the leather sleeve is located at the front end of the cable and can move forward around the outer periphery of the wire core; b. moving the leather sleeve forward by a set distance, a part of the rear end of the leather sleeve is sleeved on the outside of the wire core to wrap the wire core, and there is a bare wire core between the leather sleeve and the uncut insulating skin at the rear; c. crimping the wire harness terminal outside the bare wire core.

[0006] Furthermore, in the above step b, the length of the exposed wire core is smaller than the length of the wiring harness terminal, a part of the wiring harness terminal is located outside the exposed wire core, and another part is located outside the uncut insulation skin at the rear, and in step c, when crimping the wiring harness terminal, the wiring harness terminal is moved forward relative to the cable, and the front end of the wiring harness terminal pushes the leather cover forward, and when the leather cover is detached from the wire core, the wiring harness terminal is completely located outside the wire core, and the entire wiring harness terminal is crimped to the outside of the wire core.

[0007] Furthermore, the wiring harness terminal includes a U-shaped bottom groove, which includes a first U-shaped part and a second U-shaped part arranged in front and behind, the openings of the first U-shaped part and the second U-shaped part face upward, and the cable is used to be placed in the first U-shaped part and the second U-shaped part. The left and right sides of the first U-shaped part and the second U-shaped part are respectively connected with a plurality of crimping strips, the front and rear length of the first U-shaped part is the same as the length of the exposed wire core in step b, and the total length of the first U-shaped part and the second U-shaped part is the same as the total length of the wire core exposed after the leather cover is separated from the wire core.

[0008] Furthermore, the crimping strip extends in the up-down direction in the initial state, and the crimping strip includes an upper bending section and a lower side bending section which are sequentially arranged in the upper and lower parts, one of the front and rear side edges of the lower side bending section is connected to the lower end of the upper bending section and the upper end of the U-shaped bottom groove, and the other can be bent toward the direction close to the wire core, and the upper bending section extends in the up-down direction in the initial state. During the process of crimping the wiring harness terminal in step c, one side of the lower side bending section of a crimping strip is first bent toward the wire core direction, and then the upper end of the upper bending section is bent downward, so that the crimping strip is wrapped around the outside of the wire core.

[0009] Furthermore, a connecting section is provided between the first U-shaped portion and the second U-shaped portion, and the front and rear ends of the connecting section are respectively connected to the first U-shaped portion and the second U-shaped portion, and the height of the first U-shaped portion is higher than that of the second U-shaped portion to form a step between the first U-shaped portion and the second U-shaped portion. In step c, when the wiring harness terminal moves forward relative to the cable, the step between the first U-shaped portion and the second U-shaped portion is flattened so that the first U-shaped portion and the second U-shaped portion are at the same height.

[0010] A wire harness terminal crimping device for implementing the above-mentioned wire harness terminal crimping method includes a base, a translation table capable of sliding in the front-to-back direction is provided on the base, the translation table is used to place the wire harness terminals and cables, a clamping mechanism for clamping the cables is provided at the rear of the translation table, and a locking mechanism for locking the wire harness terminals is provided on the translation table, so that the translation table can drive the wire harness terminals to move forward relative to the cables when moving forward, vertical arms extending in the up-and-down direction are respectively provided on the left and right sides of the translation table on the base, and telescopic arms telescopic in the left-to-right direction are respectively provided on opposite sides of the two vertical arms, and the telescopic arms are extended to crimp the wire harness terminals onto the wire cores of the cables.

[0011] Furthermore, the wiring harness terminal includes a U-shaped bottom groove extending in the front-to-back direction, the U-shaped bottom groove includes a first U-shaped part and a second U-shaped part arranged in front and behind, and the left and right sides of the first U-shaped part and the second U-shaped part are respectively connected to a plurality of crimping strips, and the crimping strips extend in the up-down direction in an initial state, and the crimping strips include an upper bending section and a lower side bending section arranged in sequence from top to bottom, one of the front and rear side edges of the lower side bending section is connected to the lower end of the upper bending section and the upper end of the U-shaped bottom groove, and the other can be bent in the direction close to the wire core, and the upper bending section extends in the up-down direction in the initial state; the opposite sides of the two vertical arms are respectively provided with swing arms that can swing in the front-to-back direction, and the swing arms can squeeze the lower side bending section of the crimping strip toward the wire core when swinging, so that one side of the lower side bending section is tightly fitted with the outer surface of the wire core.

[0012] Furthermore, a rotating shaft extending in the up-down direction is rotatably provided on the vertical arm, and the upper end of the rotating shaft is connected to the swing arm. When the rotating shaft rotates, it can drive the swing arm to swing. The lower end of the rotating shaft is connected to a transmission gear. Racks are respectively provided on the left and right sides of the translation stage, and the racks are intermittently distributed along the front-to-back direction. A linear driving mechanism for driving the translation stage to move along the front-to-back direction is provided on the base. During the forward movement of the translation stage, the racks on both sides of the translation stage intermittently drive the transmission gear to rotate. A torsion spring is provided on the rotating shaft, and the torsion spring drives the rotating shaft to rotate when the transmission gear and the rack are disengaged to reset the swing arm.

[0013] Furthermore, a connecting section is provided between the first U-shaped part and the second U-shaped part, and the front and rear ends of the connecting section are respectively connected to the first U-shaped part and the second U-shaped part, and the height of the first U-shaped part is higher than that of the second U-shaped part to form a step between the first U-shaped part and the second U-shaped part; a push plate is fixed on the base behind the translation table, and the height of the push plate is flush with the height of the translation table. The push plate is used to position and cooperate with the step to position the wiring harness terminal placed on the translation table, and when the wiring harness terminal moves forward relative to the cable, the push plate is pressed and cooperated with the step to flatten the step.

[0014] Furthermore, the locking mechanism includes a positioning protrusion arranged on the upper side of the translation stage, and a positioning groove cooperating with the positioning protrusion is provided on the lower side of the U-shaped bottom groove of the wiring harness terminal. The positioning protrusion enters the positioning groove after the wiring harness terminal is placed on the translation stage.

[0015] The beneficial effects of the present invention are as follows: a wire harness terminal crimping method and a crimping device thereof of the present invention, before crimping the wire harness terminal to the outside of the wire core of the cable, the wire harness terminal crimping method first uses a cutting tool to cut a circle circumferentially around the outer periphery of the insulating skin at one end of the cable so that the insulating skin at one end of the cable is cut off, and the cut insulating skin forms a leather cover that can move around the outer periphery of the wire core, and then the leather cover moves toward the front of the cable to expose a section of the middle wire core, and then the wire harness terminal is crimped to the outside of this section of the exposed wire core, and at the same time, the leather cover staying at the front end of the wire core can play a role in tightening the wire core to prevent the middle wire core from diverging to the surroundings, so that the wire harness terminal can be crimped to the wire core more efficiently and tightly.

[0016] Furthermore, in the process of crimping the wiring harness terminal of the present invention, the wiring harness terminal moves forward relative to the cable, not only pushing the leather cover forward to gradually fall off, but also gradually bending and crimping the crimping strip on the wiring harness terminal. The entire crimping process is completed synchronously. In the process of moving forward relative to the cable, the wiring harness terminal can straighten the wire core, thereby improving the crimping effect, and is fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of a wire harness terminal crimping device of the present invention in use; Figure 2 for Figure 1 A top view of Figure 3 for Figure 2 Left view of Figure 4 It is a three-dimensional schematic diagram of an embodiment of a wire harness terminal crimping device of the present invention (the clamping mechanism is not shown); Figure 5 It is a three-dimensional schematic diagram of a wiring harness terminal in one embodiment of a wiring harness terminal crimping device of the present invention; Figure 6 The present invention is a stereoscopic schematic diagram of a cable in an embodiment of a wiring harness terminal crimping method of the present invention.

[0019] In the figure: 100, cable; 101, wire core; 102, holster; 200, crimping strip; 201, U-shaped bottom groove; 202, lower side bend section; 203, upper bend section; 204, step; 205, first U-shaped part; 206, second U-shaped part; 300, base; 301, clamping mechanism; 302, translation table; 303, transmission gear; 304, swing arm; 305, rotating shaft; 306, rack; 307, push plate; 308, vertical arm; 309, telescopic arm; 400, mounting groove; 401, sliding track; 402, positioning bump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] An embodiment of a wiring harness terminal crimping device of the present invention is as follows Figures 1 to 5 As shown, the wire harness terminal crimping device includes a base 300, on which a translation platform 302 capable of sliding in the front-to-back direction is provided. In this embodiment, a mounting groove 400 is provided on the base 300 below the translation platform 302, and a linear drive mechanism (not shown in the figure) is installed in the mounting groove 400. The linear drive mechanism is connected to the translation platform 302 in a transmission manner to enable the translation platform 302 to slide in the front-to-back direction. In addition, sliding rails 401 are provided on the left and right sides of the mounting groove 400 on the base 300, respectively, and the translation platform 302 is guided and matched with the sliding rails 401 to enable the translation platform 302 to move smoothly on the base 300.

[0022] The upper side of the translation platform 302 has a placement plane. The translation platform 302 is used to place the wiring harness terminal and the cable 100. When in use, the wiring harness terminal is first placed on the translation platform 302, and then the cable 100 is placed in the wiring harness terminal on the translation platform 302. A clamping mechanism 301 for clamping the cable 100 is provided at the rear of the translation platform 302. After the cable 100 is placed on the translation platform 302, the clamping mechanism 301 clamps and fixes the cable 100 from the rear. A locking mechanism for locking the wiring harness terminal is provided on the translation platform 302, so that the translation platform 302 can drive the wiring harness terminal to move forward relative to the cable 100 when moving forward. In this embodiment, the locking mechanism includes a positioning protrusion 402 arranged on the upper side of the translation stage 302, and a positioning groove cooperating with the positioning protrusion 402 is provided on the lower side of the wiring harness terminal. The positioning protrusion 402 enters the positioning groove after the wiring harness terminal is placed on the translation stage 302, thereby realizing the forward movement of the wiring harness terminal together with the translation stage 302 when the translation stage 302 moves forward.

[0023] Before further describing the harness terminal crimping device, the present invention first describes in detail the structure of the harness terminal crimped on the front end of the cable 100. In the present invention, the harness terminal includes a U-shaped bottom groove 201, and the U-shaped bottom groove 201 includes a first U-shaped part 205 and a second U-shaped part 206 arranged one after the other, the openings of the first U-shaped part 205 and the second U-shaped part 206 face upward, and the cable is used to be placed in the first U-shaped part 205 and the second U-shaped part 206, and there is a connecting section between the first U-shaped part 205 and the second U-shaped part 206, and the front and rear ends of the connecting section are respectively connected to the first U-shaped part 205 and the second U-shaped part 206, and the height of the first U-shaped part 205 is higher than the second U-shaped part 206, so as to form a step 204 between the first U-shaped part 205 and the second U-shaped part 206. The first U-shaped portion 205 and the second U-shaped portion 206 are respectively connected to a plurality of crimping strips 200 in parallel on the left and right sides. The crimping strips 200 extend in the up-down direction in the initial state. The crimping strips 200 include an upper bending section 203 and a lower bending section 202 arranged in sequence from top to bottom. One of the front and rear sides of the lower bending section 202 is connected to the lower end of the upper bending section 203 and the upper end of the U-shaped bottom groove 201, and the other can be bent in the direction close to the wire core 101. The upper bending section 203 extends in the up-down direction in the initial state. Figure 5In the wiring harness terminal shown, the left and right crimping strips 200 at the front end of the first U-shaped portion 205 are in a bent state, the lower bending sections 202 of the two crimping strips 200 are bent toward the inside of the wiring harness terminal, and the upper bending sections 203 are bent toward the inside of the wiring harness terminal and downward. The remaining crimping strips 200 on the first U-shaped portion 205 and all the crimping strips 200 on the second U-shaped portion 206 are in an initial state, that is, a state of extending up and down. In addition, the positioning groove is provided at the lower side of the U-shaped bottom groove 201 of the wiring harness terminal.

[0024] The following continues to describe the wiring harness terminal crimping device of the present invention. Figures 1 to 5 As shown, in this embodiment, vertical arms 308 extending in the up-down direction are respectively provided on the left and right sides of the translation platform 302 on the base 300, and telescopic arms 309 extending in the left-right direction are respectively provided on the opposite sides of the two vertical arms 308. The telescopic arms 309 are extended to crimp the wiring harness terminal on the wire core 101 of the cable 100. In this embodiment, the upper bending sections 203 of each crimping strip 200 on the wiring harness terminal are bent one by one by utilizing the telescopic arms 309 extending in the left-right direction, so that each crimping strip 200 is clamped on the outside of the wire core 101 of the cable 100. In this embodiment, swing arms 304 capable of swinging in the front-back direction are respectively provided on the opposite sides of the two vertical arms 308. When swinging, the swing arms 304 can press the lower side bending section 202 of the crimping strip 200 toward the wire core 101, so that one side of the lower side bending section 202 is pressed and matched with the outer surface of the wire core 101. It should be noted here that the left and right widths of the U-shaped bottom groove 201 of the wiring harness terminal in the initial state and the distance between the left and right crimping strips 200 are greater than the diameter of the cable 100 after the insulation skin is removed. By setting the lower side bend section 202, the present invention can extrude the wire core 101 from the side of the cable 100 to the middle, and use the upper bend section 203 to clamp the wire core 101 from the top, thereby ensuring that the wiring harness terminal and the wire core 101 are more closely connected.

[0025] In this embodiment, the telescopic arm 309 is a telescopic cylinder, one end of which is fixed on the vertical arm 308, and the other end is cantilevered toward the middle of the two vertical arms 308. In this embodiment, a rotating shaft 305 extending in the up-down direction is rotatably provided on the vertical arm 308, and the upper end of the rotating shaft 305 is connected to the swing arm 304. When the rotating shaft 305 rotates, it can drive the swing arm 304 to swing. The lower end of the rotating shaft 305 is connected to the transmission gear 303. Racks 306 are respectively provided on the left and right sides of the translation platform 302, and the racks 306 are intermittently distributed along the front-back direction. During the forward movement of the translation platform 302, the racks 306 on both sides of the translation platform 302 intermittently drive the transmission gear 303 to rotate, and the rotation of the transmission gear 303 drives the swing arm 304 at the upper end of the rotating shaft 305 to rotate, thereby pushing the lower side bending section 202 of the crimping strip 200 to bend toward the inner side of the wiring harness terminal. In addition, a torsion spring is provided on the rotating shaft 305 , and when the transmission gear 303 is disengaged from the rack 306 , the torsion spring drives the rotating shaft 305 to rotate so as to reset the swing arm 304 , so that the swing arm 304 can press the lower curved section 202 of each crimping strip 200 one by one.

[0026] In this embodiment, a push plate 307 is fixed to the base 300 behind the translation stage 302. The height of the push plate 307 is flush with the height of the translation stage 302. The push plate 307 is used to position and cooperate with the step 204 to position the wiring harness terminal placed on the translation stage 302. That is, after the wiring harness terminal is placed on the translation stage 302, the step 204 between the first U-shaped part 205 and the second U-shaped part 206 is positioned and cooperated with the push plate 307, thereby positioning the front and rear positions of the wiring harness terminal. In the process of crimping the wiring harness terminal, when the wiring harness terminal moves forward relative to the cable 100, the push plate 307 is pressed and cooperated with the step 204, and the step 204 is flattened, so that the bottoms of the first U-shaped part 205 and the second U-shaped part 206 are pulled to the same height.

[0027] An embodiment of the wire harness terminal crimping method of the present invention is implemented by using the above-mentioned wire harness terminal crimping device, such as Figures 1 to 6 As shown, the structure of the wire harness terminal crimping equipment is as follows Figures 1 to 5 As shown, the wiring harness terminal crimping method includes the following steps: a. First, use a cutting tool to cut a circle around the outer periphery of the insulating skin at one end of the cable 100 along the circumferential direction, so that the insulating skin at one end of the cable 100 is cut off. The cut insulating skin forms a leather cover 102 that can move around the outer periphery of the core 101. The axis of the cable 100 is set to extend in the front-to-back direction. The leather cover 102 is located at the front end of the cable 100 and can move forward around the outer periphery of the core 101.

[0028] b. Move the leather case 102 forward by a set distance. Figure 6 In the state shown, a portion of the rear end of the leather cover 102 is sleeved outside the wire core 101 to wrap the wire core 101, and there is a bare wire core 101 between the leather cover 102 and the uncut insulation sheath at the rear.

[0029] c. Crimp the wiring harness terminal onto the exposed wire core 101.

[0030] In this embodiment, before implementing the above step c, the wiring harness terminal is first placed on the translation stage 302 of the wiring harness terminal crimping device, and the step 204 in the middle of the wiring harness terminal is positioned and matched with the push plate 307 of the wiring harness terminal crimping device to limit the front and rear position of the wiring harness terminal, and the positioning protrusion 402 on the upper side of the translation stage 302 is inserted into the positioning groove on the lower side of the wiring harness terminal. Then the cable 100 obtained in step b is placed in the wiring harness terminal on the translation stage 302. After the wiring harness terminal and the cable 100 are placed, Figure 1 and Figure 2 As shown, the clamping mechanism 301 at the rear of the base 300 clamps and fixes the cable 100 , and at this time, the translation platform 302 is in the initial position, that is, the front end of the translation platform 302 is between the left and right vertical arms 308 .

[0031] In this embodiment, in the above step b, the length of the exposed wire core 101 is less than the length of the harness terminal, a part of the harness terminal is located outside the exposed wire core 101, and another part is located outside the uncut insulation skin at the rear, that is, the first U-shaped part 205 at the front end of the harness terminal is located outside the exposed wire core 101, and the second U-shaped part 206 at the rear end is located outside the uncut insulation skin at the rear. In this embodiment, the front-to-back length of the first U-shaped part 205 of the harness terminal is the same as the length of the exposed wire core 101 in step b, and the total length of the first U-shaped part 205 and the second U-shaped part 206 is the same as the total length of the wire core 101 exposed after the sheath 102 is separated from the wire core 101, that is, the length of the sheath 102 cut off from the cable 100 is the same as the total length of the first U-shaped part 205 and the second U-shaped part 206.

[0032] In this embodiment, step c of the wire harness terminal crimping method also includes: making the translation stage 302 drive the wire harness terminal to move forward relative to the cable 100 during the crimping process of the wire harness terminal. During the process of the translation stage 302 driving the wire harness terminal to move forward, the racks 306 on both sides of the translation stage 302 intermittently mesh with the transmission gear 303 at the lower end of the rotating shaft 305, thereby driving the swing arm 304 to swing, and the swing arm 304 swings to press the lower side bending section 202, and then controls the telescopic arm 309 to extend and retract left and right, thereby pressing the upper bending section 203, and then as the translation stage 302 gradually moves forward, the crimping strips 200 of the first U-shaped portion 205 are crimped to the outside of the wire core 101 one by one through the swing arm 304 and the telescopic arm 309. At the same time, the front end of the harness terminal is engaged with the rear end of the leather cover 102. Since only a part of the crimping strip 200 of the harness terminal is crimped with the wire core 101 at this time, when the translation platform 302 moves forward, it can still drive the harness terminal to move forward relative to the wire core 101. The harness terminal moves forward and then pushes the leather cover 102 to move relative to the cable 100, so that the leather cover 102 falls off the front end of the wire core 101. When the leather cover 102 is detached from the wire core 101, the first U-shaped part 205 and the second U-shaped part 206 of the harness terminal are just located outside the wire core 101. At this time, the crimping strip 200 on the first U-shaped part 205 of the harness terminal is completely bent, and the front end of the second U-shaped part 206 is just between the left and right vertical arms 308, and the crimping strip 200 on the second U-shaped part 206 has not been bent yet.

[0033] When the crimping strips 200 on the first U-shaped portion 205 are bent one by one, the swing arm 304 first bends one side of the lower bending section 202 of the crimping strip 200 toward the wire core 101, and then the telescopic arm 309 is activated to extend and bend the upper end of the upper bending section 203 downward, so that the crimping strip 200 covers the outside of the wire core 101. And when the wiring harness terminal moves forward relative to the cable 100, the step 204 between the first U-shaped portion 205 and the second U-shaped portion 206 is flattened by the push plate 307, so that the first U-shaped portion 205 and the second U-shaped portion 206 are at the same height.

[0034] Then the clamping mechanism 301 is controlled to release the rear cable 100. At this time, the clamping mechanism 301 only supports the cable 100. Then the translation platform 302 moves forward again, and drives the wiring harness terminal and the cable 100 to move forward synchronously. During the forward movement of the translation platform 302, the telescopic arm 309 is extended left and right and the swing arm 304 is swung to bend the crimping strips 200 on the second U-shaped part 206 one by one, and then the entire wiring harness terminal is crimped on the outside of the wire core 101.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wire harness terminal crimping method, characterized in that: The following steps are involved: a. First, use a cutting tool to cut a circle along the circumference of the outer periphery of the insulation skin at one end of the cable so that the insulation skin at one end of the cable is cut off. The cut insulation skin forms a leather sleeve (102) that can move around the outer periphery of the wire core (101). The axis of the cable is set to extend in the front-to-back direction. The leather sleeve (102) is located at the front end of the cable and can move forward around the outer periphery of the wire core (101); b. Move the leather sleeve (102) forward a set distance, and a part of the rear end of the leather sleeve (102) is sleeved on the outside of the wire core (101) to wrap the wire core (101). There is a bare wire core (101) between the leather sleeve (102) and the uncut insulation skin at the rear; c. Crimping a wiring harness terminal outside the bare wire core (101).

2. The wire harness terminal crimping method according to claim 1, characterized in that: In the above step b, the length of the exposed wire core (101) is smaller than the length of the wiring harness terminal, a portion of the wiring harness terminal is located outside the exposed wire core (101), and another portion is located outside the uncut insulation skin at the rear; in step c, when crimping the wiring harness terminal, the wiring harness terminal is moved forward relative to the cable, and the front end of the wiring harness terminal pushes the leather cover (102) forward, and when the leather cover (102) is detached from the wire core (101), the wiring harness terminal is completely located outside the wire core (101), and the entire wiring harness terminal is crimped onto the outside of the wire core (101).

3. The wire harness terminal crimping method according to claim 2, characterized in that: The wiring harness terminal comprises a U-shaped bottom groove (201), wherein the U-shaped bottom groove (201) comprises a first U-shaped portion (205) and a second U-shaped portion (206) arranged one in front of the other, the openings of the first U-shaped portion (205) and the second U-shaped portion (206) face upward, the cable (100) is used to be placed in the first U-shaped portion (205) and the second U-shaped portion (206), and the left and right sides of the first U-shaped portion (205) and the second U-shaped portion (206) are respectively connected to a plurality of crimping strips (200), the front-to-back length of the first U-shaped portion (205) is the same as the length of the exposed wire core (101) in step b, and the total length of the first U-shaped portion (205) and the second U-shaped portion (206) is the same as the total length of the wire core (101) exposed after the leather cover (102) is separated from the wire core (101).

4. The wire harness terminal crimping method according to claim 3, characterized in that: The crimping strip (200) extends in the up-down direction in the initial state. The crimping strip (200) comprises an upper bending section (203) and a lower bending section (202) which are arranged in sequence from top to bottom. One of the front and rear side edges of the lower bending section (202) is connected to the lower end of the upper bending section (203) and the upper end of the U-shaped bottom groove (201), and the other side can be bent in a direction close to the wire core (101). The upper bending section (203) extends in the up-down direction in the initial state. In the process of crimping the wiring harness terminal in step c, one side of the lower bending section (202) of a crimping strip (200) is first bent toward the wire core (101), and then the upper end of the upper bending section (203) is bent downward, so that the crimping strip (200) is wrapped around the outside of the wire core (101).

5. The wire harness terminal crimping method according to claim 4, characterized in that: A connecting section is provided between the first U-shaped portion (205) and the second U-shaped portion (206), and the front and rear ends of the connecting section are respectively connected to the first U-shaped portion (205) and the second U-shaped portion (206); the height of the first U-shaped portion (205) is higher than that of the second U-shaped portion (206), so as to form a step (204) between the first U-shaped portion (205) and the second U-shaped portion (206); in step c, when the wiring harness terminal moves forward relative to the cable, the step (204) between the first U-shaped portion (205) and the second U-shaped portion (206) is flattened, so that the first U-shaped portion (205) and the second U-shaped portion (206) are at the same height.

6. A wire harness terminal crimping device for implementing any one of the wire harness terminal crimping methods of claims 1 to 5, comprising a base (300), characterized in that: The base (300) is provided with a translation platform (302) capable of sliding in a front-to-rear direction, the translation platform (302) being used to place wiring harness terminals and cables, a clamping mechanism (301) for clamping cables being provided at the rear of the translation platform (302), a locking mechanism for locking the wiring harness terminals being provided on the translation platform (302), so that the translation platform (302) can drive the wiring harness terminals to move forward relative to the cables when moving forward, and vertical arms (308) extending in an up-down direction are provided on the left and right sides of the translation platform (302) on the base (300), and telescopic arms (309) telescopic in a left-to-right direction are provided on opposite sides of the two vertical arms (308), and the telescopic arms (309) are extended to crimp the wiring harness terminals onto the wire cores (101) of the cables.

7. The wire harness terminal crimping device according to claim 6, characterized in that: The wiring harness terminal comprises a U-shaped bottom groove (201) extending in the front-to-back direction, the U-shaped bottom groove (201) comprising a first U-shaped portion (205) and a second U-shaped portion (206) arranged one behind the other, a plurality of crimping strips (200) are respectively connected to the left and right sides of the first U-shaped portion (205) and the second U-shaped portion (206), the crimping strips (200) extending in the up-down direction in an initial state, the crimping strips (200) comprising an upper bending section (203) and a lower side bending section (202) arranged in sequence from top to bottom, the front and rear sides of the lower side bending section (202) being connected to the first U-shaped portion (205) and the second U-shaped portion (206 ... front and rear sides of the lower side bending section (202) being connected to the first U-shaped portion (205) and the second U-shaped portion (206) being connected to the first U-shaped portion (205) and the second U-shaped portion (206) being connected to the second U-shaped portion (20 One is connected to the lower end of the upper bending section (203) and the upper end of the U-shaped bottom groove (201), and the other is capable of bending in a direction close to the wire core (101), and the upper bending section (203) extends in the up-down direction in an initial state; and swing arms (304) capable of swinging in the front-back direction are respectively provided on opposite sides of the two vertical arms (308), and the swing arms (304) are capable of pressing the lower bending section (202) of the crimping strip (200) in the direction of the wire core (101) when swinging, so that one side of the lower bending section (202) is pressed tightly against the outer surface of the wire core (101).

8. The wire harness terminal crimping device according to claim 7, characterized in that: The vertical arm (308) is rotatably provided with a rotating shaft (305) extending in the up-down direction, the upper end of the rotating shaft (305) is connected to the swing arm (304), and when the rotating shaft (305) rotates, it can drive the swing arm (304) to swing, and the lower end of the rotating shaft (305) is connected to a transmission gear (303), and racks (306) are respectively provided on the left and right sides of the translation platform (302), and the racks (306) are intermittently distributed in the front-back direction. The base A linear drive mechanism for driving the translation platform (302) to move in the front-rear direction is provided on (300). When the translation platform (302) moves forward, the racks (306) on both sides of the translation platform (302) intermittently drive the transmission gear (303) to rotate. A torsion spring is provided on the rotating shaft (305). When the transmission gear (303) is disengaged from the rack (306), the torsion spring drives the rotating shaft (305) to rotate so as to reset the swing arm (304).

9. The wire harness terminal crimping device according to claim 8, characterized in that: A connecting section is provided between the first U-shaped portion (205) and the second U-shaped portion (206), and the front and rear ends of the connecting section are respectively connected to the first U-shaped portion (205) and the second U-shaped portion (206); the height of the first U-shaped portion (205) is higher than that of the second U-shaped portion (206), so as to form a step (204) between the first U-shaped portion (205) and the second U-shaped portion (206); a push plate (307) is fixed to the base (300) behind the translation platform (302); the height of the push plate (307) is flush with the height of the translation platform (302); the push plate (307) is used to position and cooperate with the step (204) to position the wiring harness terminal placed on the translation platform (302); when the wiring harness terminal moves forward relative to the cable, the push plate (307) is pressed and cooperated with the step (204) to flatten the step (204).

10. The wire harness terminal crimping device according to claim 9, characterized in that: The locking mechanism comprises a positioning protrusion (402) arranged on the upper side of the translation platform (302), and a positioning groove cooperating with the positioning protrusion (402) is provided on the lower side of the U-shaped bottom groove (201) of the wiring harness terminal, and the positioning protrusion (402) enters the positioning groove after the wiring harness terminal is placed on the translation platform (302).

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