A process flow for automobile wiring harness assembly

Abstract

The invention relates to an automobile wiring harness final assembly process flow, belonging to the field of automobile wiring harness final assembly, and specifically comprises the following steps: taking wires out of a warehouse, performing a wire cutting operation on the wires, specifically cutting the wires into wire segments of a specified size, crimping or welding the ends of the cut wires to terminal blocks, foaming and installing a wiring harness ring on a firewall module wiring harness, performing an electrical test on the firewall module wiring harness, and performing wiring harness final assembly, specifically integrating and assembling the firewall module wiring harness with other wiring harnesses, installing a wiring harness support frame for fixing the position of the wiring harness on the integrated wiring harness, performing an electrical test on the integrated wiring harness again, installing a fuse distributor on the integrated wiring harness, performing a torque test on a locking bolt on the fuse distributor, then installing a fuse on the fuse distributor, and finally performing a comprehensive test on the integrated wiring harness, and packaging qualified wiring harnesses, so as to solve the problems of low production rate and high product error rate of automobile wiring harnesses.

Description

Technical Field

[0001] The invention belongs to the field of automobile wiring harness assembly, and in particular relates to an automobile wiring harness assembly process flow. Background Art

[0002] With the development of automobile industrialization, the market demand has increased rapidly, and automobile wiring harness is an indispensable part of automobile. The so-called automobile wiring harness is the network body of automobile circuit. Without wiring harness, there is no automobile circuit. At present, whether it is a high-end luxury car or an ordinary economical car, the form of wiring harness is basically the same. It is composed of wires, connectors and wrapping tapes. Before arranging the wiring harness, it is necessary to draw the wiring harness diagram. After the technicians of the wiring harness factory make the wiring harness wiring board according to the wiring harness diagram, the workers will cut and arrange the wires according to the regulations of the wiring board. However, in the process of cutting and arranging the wires, there are problems such as unsmooth connection between each process, chaotic process sequence, and time-consuming connection process between the wire end and the terminal, which leads to low production rate of wiring harness assembly and high product error rate.

[0003] Therefore, in order to solve these problems, the present device provides an automobile wiring harness assembly process flow. Summary of the invention

[0004] The invention aims to provide an automobile wiring harness final assembly process flow to solve the problems of low automobile wiring harness production rate and high product error rate.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of an automobile wiring harness assembly process flow of the present invention is as follows:

[0006] An automotive wiring harness assembly process flow, the specific steps are:

[0007] S1. Take the wires out of the warehouse and perform a wire cutting operation on the wires, specifically cutting the wires into wire segments of a specified size;

[0008] S2. Crimping or welding the ends of the cut wires to the terminals;

[0009] S21, placing the cut wire into a wire slot provided on the device frame and conveying it to the alignment plate through a conveying device;

[0010] S22, the ends of the wires are in contact with the alignment plate to align the ends of the wires;

[0011] S23, peeling the aligned wire ends by a peeling device;

[0012] S24, plugging the peeled end of the wire into the wiring terminal through a plug-in device;

[0013] S25, connecting the wire end to the terminal block by means of a connecting device, the connection method being crimping or welding;

[0014] S3. Install the wiring harness ring of the firewall module by foaming.

[0015] S4, Firewall module wiring harness is electrically tested;

[0016] S5. Performing wire harness final assembly, specifically, integrating and assembling the firewall module wire harness with other wire harnesses;

[0017] S6. Installing a wire harness support frame for fixing the position of the wire harness on the integrated wire harness;

[0018] S7. Conduct electrical testing on the integrated wiring harness again;

[0019] S8. Install the fuse distributor on the integrated wiring harness, perform torque detection on the locking bolts on the fuse distributor, and then install the fuse on the fuse distributor;

[0020] S9. Finally, conduct a comprehensive inspection on the integrated wiring harness;

[0021] S10. Pack qualified wire harnesses.

[0022] Furthermore, in S3, a ring mold is used, and the designated position of the wire harness is placed in the mold. A foaming agent is injected into the mold so that the foaming agent wraps the wire harness in a ring shape. After the foaming agent solidifies, the mold is removed, thereby forming a wire harness ring on the wire harness. The wire harness ring is used to be placed at the through-hole position of the vehicle body wire harness.

[0023] Further, the electrical test methods for S4 and S7 are:

[0024] S41. Place the wiring harness on the electrical test bench and start the electrical test procedure;

[0025] S42, use a scanner to scan the wiring harness label;

[0026] S43, sequentially performing a continuity test and a low resistance test on the wiring harness;

[0027] S44, after passing the test, pass it to the next station.

[0028] Furthermore, in S6, the main function of the automobile wiring harness bracket is to fix the wiring harness on the automobile to avoid the problem that the wiring harnesses cannot be separated from each other and are easily entangled with each other.

[0029] Furthermore, S8 includes torque detection and fuse insertion, and the torque detection is to perform torque detection on the bolts on the fuse distributor.

[0030] Furthermore, in S9, the appearance of the final product is inspected, the tightness of the installation between the components is inspected, and the integrity of the final product is inspected.

[0031] Furthermore, in step S21, the wire conveying method is as follows: the cut wire is placed in a wire groove provided on the device frame, the wire is located on the auxiliary wheel, the hydraulic cylinder 1 pushes the connecting frame down, so that the roller contacts the wire, the buffer column slides in the groove of the connecting frame, so that the spring is compressed to avoid hard contact between the roller and the wire, and the motor 1 is started. The motor 1 drives the sprocket to rotate and drives multiple sprockets to rotate through the chain, so that multiple rollers rotate to realize the movement of the wire.

[0032] Furthermore, in step S22, the wire end alignment method is to drive the turntable 1 to rotate by the motor 2, so that the alignment baffle is vertically downward, and the alignment baffle is pushed downward to the specified position by the hydraulic cylinder 2.

[0033] Further, in step S23, the method for peeling the wire end is as follows: motor 2 drives turntable 1 to rotate so that the upper peeling knife is positioned vertically downward, motor 3 drives turntable 2 to rotate so that the lower peeling knife is positioned vertically upward, hydraulic cylinder 3 pushes the upper peeling knife, and hydraulic cylinder 4 pushes the lower peeling knife, so that the upper peeling knife and the lower peeling knife are closed to cut the insulation at the end of the wire, and then the upper hydraulic cylinder and the lower hydraulic cylinder are started at the same time to move the closed upper peeling knife and the lower peeling knife to peel off the cut insulation.

[0034] Further, in step S25, the method for connecting the wire end with the terminal is to drive the turntable 1 to rotate by the motor 2 so that the crimping head 1 is positioned vertically downward, and drive the turntable 2 to rotate by the motor 3 so that the crimping head 2 is positioned vertically upward, and start the upper crimping hydraulic cylinder and the lower crimping hydraulic cylinder to close the crimping head 1 and the crimping head 2 to complete the crimping; or control the upper welding gun position vertically downward by the motor 2, and control the lower welding gun position vertically upward by the motor 3, and respectively make the upper welding gun and the lower welding gun reach the welding position by the first hydraulic cylinder and the second hydraulic cylinder.

[0035] The advantages of the present invention are:

[0036] Through the above-mentioned automotive wiring harness assembly process, precise operations are performed step by step to achieve smooth connection between each step, thereby accelerating production efficiency; at the same time, the automotive wiring harness assembly process steps are finely divided, and the error link can be discovered at the first time, reducing the number of product errors; the connection equipment between the wires and the terminals is multiple groups, which can realize batch connection of the wires and the terminals, thereby increasing production speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of the present invention;

[0038] Figure 2 is a flow chart of step S2 of the present invention;

[0039] Figure 3It is a flow chart of the midpoint test method of S4 and S7 of the present invention;

[0040] Figure 4 This is a schematic diagram of the three-dimensional structure of the equipment used in step S2 of the present invention;

[0041] Figure 5 is a schematic diagram of the three-dimensional structure of the auxiliary wheel of the present invention;

[0042] Figure 6 It is a schematic diagram of the three-dimensional structure of the conveying device of the present invention;

[0043] Figure 7 It is a schematic diagram of the three-dimensional structure of the regulating device of the present invention;

[0044] Figure 8 It is a three-dimensional structural schematic diagram of the peeling device and the connecting device of the present invention;

[0045] Fig. 9 It is a schematic diagram of the three-dimensional structure of the plug-in device of the present invention;

[0046] Description of the markings in the figure:

[0047] Device frame 1; alignment plate 2; hydraulic cylinder 21; alignment baffle 22; conveying device 3; hydraulic cylinder 1 31; connecting frame 32; buffer column 33; spring 34; assembly frame 35; roller 36; sprocket 37; motor 1 38; chain 39; auxiliary wheel 310; peeling device 4; hydraulic cylinder 3 41; peeling knife 42; hydraulic cylinder 4 43; peeling knife 44; plug-in device 5; push hydraulic cylinder 51; U-shaped piece 52; upper clamp 53 ; lower clamp 54; connecting device 6; first hydraulic cylinder 61; connecting head 1 62; upper welding gun 63; upper crimping hydraulic cylinder 64; crimping head 1 65; lower crimping hydraulic cylinder 66; crimping head 2 67; second hydraulic cylinder 68; connecting head 2 69; lower welding gun 610; adjusting device 7; motor 2 71; turntable 1 72; upper sliding arm 73; upper hydraulic cylinder 74; motor 3 75; turntable 2 76; lower sliding arm 77; lower hydraulic cylinder 78. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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 creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] like Figure 1 As shown in the figure, a process flow of automobile wiring harness assembly, the specific steps are:

[0051] The wires are taken out from the warehouse and the wires are cut into segments of specified sizes; the ends of the cut wires are crimped or welded to the terminals; the cut wires are placed in the wire slots provided on the device frame 1 and conveyed to the alignment plate 2 through the conveying device 3; the ends of the wires are in contact with the alignment plate 2 to align the ends of the wires; the aligned ends of the wires are peeled by the peeling device 4; the peeled ends of the wires are plugged into the terminals through the plug-in device 5; the ends of the wires are connected to the terminals through the connecting device 6, and the connection method is crimping or welding; the wiring harness of the firewall module is looped The foaming installation is carried out; the firewall module wiring harness is electrically tested; the wiring harness is assembled, specifically, the firewall module wiring harness is integrated and assembled with other wiring harnesses; a wiring harness support frame for fixing the wiring harness position is installed on the integrated wiring harness; the integrated wiring harness is electrically tested again; a fuse distributor is installed on the integrated wiring harness, and the torque test is carried out on the locking bolts on the fuse distributor, and then the fuse is installed on the fuse distributor; finally, a comprehensive test is carried out on the integrated wiring harness; qualified wiring harnesses are packaged, which solves the chaos in the existing automotive wiring harness assembly process, achieves orderly construction, and reduces the effect of rework and useless processes.

[0052] like Figure 1 As shown, in S3, a ring mold is used, and the designated position of the wire harness is placed in the mold. A foaming agent is injected into the mold so that the foaming agent wraps the wire harness in a ring shape. After the foaming agent solidifies, the mold is removed, thereby forming a wire harness ring on the wire harness. The wire harness ring is used to be placed at the through-hole position of the vehicle body wire harness.

[0053] like Figure 3 As shown, the electrical test method in S4 and S7 is: place the wire harness on the electrical test bench and start the electrical test program; use a scanner to scan the wire harness label; perform a continuity test and a low resistance test on the wire harness in turn; after the test is qualified, pass it to the next station, effectively perform multiple electrical tests on the wire to ensure that the wire can be used normally.

[0054] like Figure 1 As shown, in S6, the main function of the automotive wiring harness bracket is to fix the wiring harness on the car to avoid the problem that the wiring harnesses cannot be separated from each other and are easily entangled with each other. S8 includes torque detection and fuse plugging. The torque detection is to perform torque detection on the bolts on the fuse distributor. In S9, the appearance of the final product is tested, the tightness of the installation between each component is tested, and the integrity of the finished product is tested, which solves the problem of wiring harness confusion caused by the interweaving of wiring harnesses.

[0055] like Figure 5 As shown, the conveying device 3 includes a hydraulic cylinder 31, a connecting frame 32, a buffer column 33, a spring 34, an assembly frame 35, a roller 36, a sprocket 37, a motor 38, a chain 39 and an auxiliary wheel 310. The auxiliary wheel 310 is rotatably installed in the groove of the device frame 1, and the hydraulic cylinder 31 is fixedly installed on the device frame 1. The connecting frame 32 is fixedly installed on the output end of the hydraulic cylinder 31. The buffer column 33 is slidably installed in the groove of the connecting frame 32. The buffer column 33 is sleeved with a spring 34, and the two ends of the spring 34 are respectively in contact with the connecting frame 32 and the assembly frame 35. The buffer column 33 is fixedly installed on the assembly frame 35. The roller 36 is rotatably installed on the assembly frame 35, and the sprocket 37 is fixedly installed on the roller 36. 7 is meshed with the chain 39, the sprocket 37 is fixedly mounted on the output end of the motor 38, and the motor 38 is fixedly mounted on the assembly frame 35; the wire conveying method is to place the cut wire in the wire groove set on the device frame 1, the wire is located on the auxiliary wheel 310, the hydraulic cylinder 31 pushes the connecting frame 32 to descend, so that the roller 36 contacts with the wire, the buffer column 33 slides in the groove of the connecting frame 32, so that the spring 34 is compressed to avoid the roller 36 from hard contact with the wire, and the motor 38 is started. The motor 38 drives the sprocket 37 to rotate and drives multiple sprockets 37 to rotate through the chain 39, so that multiple rollers 36 rotate, so as to realize the movement of the wire, so that the wire is stably conveyed forward, and the moving trajectory of the wire is prevented from being offset during the transmission process.

[0056] like Figure 6 and Figure 7As shown, the adjusting device 7 includes a second motor 71, a turntable 72, an upper sliding arm 73, an upper hydraulic cylinder 74, a third motor 75, a second turntable 76, a lower sliding arm 77 and a lower hydraulic cylinder 78. The upper hydraulic cylinder 74 is fixedly mounted on the device frame 1, and the upper sliding arm 73 is fixedly mounted on the output end of the upper hydraulic cylinder 74. The upper sliding arm 73 is slidably mounted in a groove provided on the device frame 1. The turntable 72 is rotatably mounted on the upper sliding arm 73. The turntable 72 is fixedly mounted on the output end of the second motor 71. The second motor 71 is fixedly mounted on the upper sliding arm 73. The lower hydraulic cylinder 78 is fixedly mounted on the device frame 1, and the lower sliding arm 77 is fixedly mounted on the output end of the lower hydraulic cylinder 78. The lower sliding arm 77 It is slidably installed in a groove set on the device frame 1, and a turntable 2 76 is rotatably installed on the lower sliding arm 77, and the turntable 2 76 is fixedly installed on the output end of the motor 3 75, and the motor 3 75 is fixedly installed on the lower sliding arm 77; the alignment plate 2 includes a hydraulic cylinder 21 and an alignment baffle 22, and the hydraulic cylinder 21 is fixedly installed on the turntable 1 72, and the alignment baffle 22 is fixedly installed on the output end of the hydraulic cylinder 21; the wire end alignment method is to drive the turntable 1 72 to rotate by the motor 2 71, so that the alignment baffle 22 is vertically downward, and the alignment baffle 22 is pushed downward to the specified position by the hydraulic cylinder 21, so that the wire ends are uniformly aligned, which is convenient for the subsequent peeling and terminal connection process construction.

[0057] like Figure 6 and Figure 7 As shown, the peeling device 4 includes a hydraulic cylinder 3 41, a peeling knife 42, a hydraulic cylinder 43 and a peeling knife 44. The hydraulic cylinder 3 41 is fixedly mounted on a turntable 1 72, and the output end of the hydraulic cylinder 3 41 is fixedly mounted with the peeling knife 42. The hydraulic cylinder 43 is fixedly mounted on a turntable 2 76, and the output end of the hydraulic cylinder 43 is fixedly mounted with the peeling knife 44. The method for peeling the wire end is as follows: the turntable 1 72 is driven to rotate by the motor 2 71, so that the peeling knife 42 is positioned vertically downward, and the motor 3 7 5 drives the turntable 2 76 to rotate, so that the peeling knife 44 is positioned vertically upward, the hydraulic cylinder 3 41 pushes the upper peeling knife 42, and the hydraulic cylinder 4 43 pushes the peeling knife 44, so that the upper peeling knife 42 and the lower peeling knife 44 are closed to cut the insulation skin at the end of the wire, and then the upper hydraulic cylinder 74 and the lower hydraulic cylinder 78 are started at the same time to move the closed upper peeling knife 42 and the lower peeling knife 44 to peel off the cut insulation skin, which can effectively remove the insulation layer of the wire end according to the fixed length to ensure the stability of the connection with the terminal.

[0058] like Figure 6 and Figure 7As shown, the connection device 6 includes a first hydraulic cylinder 61, a connector 1 62, an upper welding gun 63, an upper crimping hydraulic cylinder 64, a crimping head 1 65, a lower crimping hydraulic cylinder 66, a crimping head 2 67, a second hydraulic cylinder 68, a connector 2 69 and a lower welding gun 610. The first hydraulic cylinder 61 is fixedly mounted on a turntable 1 72, and a connector 1 62 is fixedly mounted on the output end of the first hydraulic cylinder 61. The upper welding gun 63 is mounted on the connector 1 62. The second hydraulic cylinder 68 is fixedly mounted on a turntable 2 76. The output end of the second hydraulic cylinder 68 is fixedly mounted on the connector 2 69. The lower welding gun 610 is mounted on the connector 2 69. The method for connecting the wire end to the terminal is to connect the wire end to the terminal by electric The second machine 71 drives the turntable 1 72 to rotate, so that the crimping head 1 65 is positioned vertically downward, and the turntable 2 76 is driven to rotate by the motor 3 75 to make the crimping head 2 67 be positioned vertically upward, and the upper crimping hydraulic cylinder 64 and the lower crimping hydraulic cylinder 66 are started to close the crimping head 1 65 and the crimping head 2 67 to complete the crimping; or the upper welding gun 63 is controlled to be positioned vertically downward by the motor 2 71, and the lower welding gun 610 is controlled to be positioned vertically upward by the motor 3 75, and the upper welding gun 63 and the lower welding gun 610 are respectively made to reach the welding position by the first hydraulic cylinder 61 and the second hydraulic cylinder 68, so that the two connection modes of crimping and welding can be switched freely to meet the requirements of different connection modes of wire and terminal block.

[0059] like Figure 8 As shown, the plug-in device 5 includes a pushing hydraulic cylinder 51, a U-shaped piece 52, an upper clamping piece 53 and a lower clamping piece 54. The pushing hydraulic cylinder 51 is fixedly installed in a through hole set on the device frame 1, and the output end of the pushing hydraulic cylinder 51 is fixedly installed with a U-shaped piece 52, and the upper clamping piece 53 is fixedly installed on the U-shaped piece 52, and the lower clamping piece 54 is fixedly installed on the U-shaped piece 52; the plug-in method of the wire end and the terminal is as follows: the upper clamping piece 53 and the lower clamping piece 54 are elastic clamping pieces, and the contact surfaces of the upper clamping piece 53 and the lower clamping piece 54 are both provided with corresponding terminal positioning grooves, which are convenient for the installation and position fixing of the terminal. The terminal is clamped and positioned by the upper clamping piece 53 and the lower clamping piece 54, and then transported forward by the pushing hydraulic cylinder 51 to complete the plug-in of the terminal and the peeled wire end. The end of the device frame 1 close to the plug-in device 5 is provided with a protrusion for supporting the peeled wire end to ensure that the wire end will not fall and can be accurately plugged with the terminal.

[0060] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An automotive wiring harness assembly process flow, characterized in that: The specific steps are: S1. Take the wires out of the warehouse and perform a wire cutting operation on the wires, specifically cutting the wires into wire segments of a specified size; S2. Crimping or welding the ends of the cut wires to the terminals; S21, placing the cut wire into a wire slot provided on the device frame (1) and conveying it to the alignment plate (2) through the conveying device (3); The wire conveying method comprises placing the cut wire into a wire groove provided on a device frame (1), the wire being located on an auxiliary wheel (310), a hydraulic cylinder (31) pushing a connecting frame (32) downward so that a roller (36) contacts the wire, a buffer column (33) sliding in a groove of the connecting frame (32) so that a spring (34) is compressed to prevent the roller (36) from making hard contact with the wire, and a motor (38) is started. The motor (38) drives a sprocket (37) to rotate and drives a plurality of sprockets (37) to rotate through a chain (39), so that a plurality of rollers (36) rotate, thereby realizing wire movement; S22, the ends of the wires are brought into contact with the alignment plate (2) so that the ends of the wires are aligned; S23, peeling the aligned wire ends using a peeling device (4); S24, plugging the peeled end of the wire into the wiring terminal through the plug-in device (5); S25, connecting the wire end to the wiring terminal by means of a connecting device (6), wherein the connection method is crimping or welding; S3. Install the wiring harness ring of the firewall module by foaming. S4, Firewall module wiring harness is electrically tested; S5. Performing wire harness final assembly, specifically, integrating and assembling the firewall module wire harness with other wire harnesses; S6. Installing a wire harness support frame for fixing the position of the wire harness on the integrated wire harness; S7. Conduct electrical testing on the integrated wiring harness again; S8. Install the fuse distributor on the integrated wiring harness, perform torque detection on the locking bolts on the fuse distributor, and then install the fuse on the fuse distributor; S9. Finally, conduct a comprehensive inspection on the integrated wiring harness; S10. Pack qualified wire harnesses.

2. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In S3, a ring mold is used to place the designated position of the wire harness in the mold. A foaming agent is injected into the mold to wrap the wire harness in a ring shape. After the foaming agent solidifies, the mold is removed to form a wire harness ring on the wire harness. The wire harness ring is used to be placed at the through-hole position of the vehicle body wire harness.

3. The automotive wiring harness assembly process flow according to claim 1, characterized in that: The electrical test methods for S4 and S7 are: S41. Place the wiring harness on the electrical test bench and start the electrical test procedure; S42, use a scanner to scan the wiring harness label; S43, sequentially performing a continuity test and a low resistance test on the wiring harness; S44, after passing the test, pass it to the next station.

4. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In S6, the function of the car wiring harness bracket is to fix the wiring harness on the car to avoid the problem that the wiring harnesses cannot be separated from each other and are easily entangled with each other.

5. The automotive wiring harness assembly process flow according to claim 1, characterized in that: S8 includes torque detection and fuse insertion. Torque detection is to perform torque detection on the bolts on the fuse distributor.

6. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In S9, the appearance of the final product is inspected, the tightness of the installation between the components is inspected, and the integrity of the finished product is inspected.

7. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In step S22, the wire end alignment method is to drive the turntable 1 (72) to rotate by the motor 2 (71) so that the alignment baffle (22) is vertically downward, and the alignment baffle (22) is pushed downward to a specified position by the hydraulic cylinder 2 (21).

8. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In step S23, the method for peeling the end of the wire is as follows: the motor 2 (71) drives the turntable 1 (72) to rotate so that the upper peeling knife (42) is positioned vertically downward; the motor 3 (75) drives the turntable 2 (76) to rotate so that the lower peeling knife (44) is positioned vertically upward; the hydraulic cylinder 3 (41) pushes the upper peeling knife (42); the hydraulic cylinder 4 (43) pushes the lower peeling knife (44) so ​​that the upper peeling knife (42) and the lower peeling knife (44) are closed to cut the insulation at the end of the wire; and then the upper hydraulic cylinder (74) and the lower hydraulic cylinder (78) are started simultaneously to move the closed upper peeling knife (42) and the lower peeling knife (44) to peel off the cut insulation.

9. The automotive wiring harness assembly process flow according to claim 1, characterized in that: In step S25, the method for connecting the wire end with the connection terminal comprises: driving the turntable 1 (72) to rotate by the motor 2 (71) so that the crimping head 1 (65) is positioned vertically downward, driving the turntable 2 (76) to rotate by the motor 3 (75) so that the crimping head 2 (67) is positioned vertically upward, starting the upper crimping hydraulic cylinder (64) and the lower crimping hydraulic cylinder (66) so that the crimping head 1 (65) and the crimping head 2 (67) are closed to complete the crimping; or controlling the upper welding gun (63) to be positioned vertically downward by the motor 2 (71), controlling the lower welding gun (610) to be positioned vertically upward by the motor 3 (75), and respectively making the upper welding gun (63) and the lower welding gun (610) reach the welding position by the first hydraulic cylinder (61) and the second hydraulic cylinder (68).

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