An automotive wire harness terminal crimping method and device

Abstract

The present invention relates to the technical field of automotive wiring harness processing. Specifically, it relates to a method and device for crimping automotive wiring harness terminals. The method includes obtaining the wiring harness type of the target mass-produced wiring harness. After obtaining the wiring harness type, a first sample test is conducted on multiple first wiring harnesses, and a second sample test is conducted on multiple second wiring harnesses. After the first sample test and the second sample test are completed, the first pressure data of the first sample test and the second pressure data of the second sample test are obtained. Based on the first pressure data and the second pressure data satisfying Nmax > Mmax > (Nmin × k1), a first pressure range is obtained. Based on crimping terminals to the target mass-produced wiring harness, a third pressure value of the wiring harness with crimped terminals is obtained. Based on the third pressure value being within the first pressure range, the crimped target mass-produced wiring harness is fed into the good product area. In this way, the problem of how to quickly determine whether the terminal crimping of an automotive wiring harness is qualified is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive wire harness processing, and more particularly, to a method and device for crimping automotive wire harness terminals. Background Art

[0002] An automotive wire harness is the main network of an automotive circuit. Without a wire harness, there would be no automotive circuit. The automotive wire harness connects the electrical and electronic components of the vehicle and enables them to function. The automotive wire harness includes an insulating sleeve, a core wire, a waterproof sleeve, and a terminal. The insulating sleeve wraps around the outside of the core wire. The core wire includes multiple copper wires. The waterproof sleeve wraps around the outside of the insulating sleeve. One end of the waterproof sleeve and the exposed copper wire are crimped inside the terminal. The terminal includes a first crimping wing and a second crimping wing. The first crimping wing wraps around the outside of the waterproof sleeve, and the second crimping wing wraps around the outside of the exposed end of the copper wire.

[0003] Currently, a special tool is required to strip the insulation layer at the end of the core wire, and then the exposed core wire is inserted into the terminal for crimping. However, due to positioning deviations during the crimping process and the tendency of the exposed copper wires outside the insulating sleeve to spread, some core wires are exposed outside the crimping area before the crimping die presses the core wire, resulting in unqualified automotive wire harnesses after crimping. This exposure of the core wire can cause an abnormal increase in contact resistance, oxidation and corrosion of the contact surface under the action of current load, and at the same time reduce the mechanical vibration resistance of the connection part. Summary of the Invention

[0004] To solve the problem of how to quickly determine whether the terminal crimping of an automotive wire harness is qualified, the present invention provides a method and device for crimping automotive wire harness terminals.

[0005] In a first aspect, the present invention provides a method for crimping automotive wire harness terminals, the method for crimping automotive wire harness terminals comprising:

[0006] Step S10, obtaining the wire harness type of the target mass-produced wire harness, the wire harness type including the diameter of the target mass-produced wire harness and the number of copper wires;

[0007] Step S20, based on the completion of obtaining the wire harness type, conducting a first sample test on multiple first wire harnesses and a second sample test on multiple second wire harnesses; wherein, the wire harness types of the first wire harnesses and the second wire harnesses are the same as the wire harness type of the target mass-produced wire harness; the first sample test is to test the first pressure value when all the copper wires of the first wire harness are crimped into the terminal; the second sample test is to test the second pressure value when a first proportion of the copper wires of the second wire harness are crimped into the terminal; the first proportion is the proportion of the number of copper wires of the second wire harness crimped into the terminal to the total number of copper wires; the first proportion is less than 1;

[0008] Step S30, based on the completion of the first sample test and the second sample test, obtain the first pressure data of the first sample test and the second pressure data of the second sample test; wherein, the first pressure data includes a plurality of the first pressure values; the second pressure data includes a plurality of the second pressure values;

[0009] Step S40, the step S40 includes step S41;

[0010] Step S41, based on the first pressure data and the second pressure data satisfying N max >M max >(N min ×k1), obtain the first pressure range; wherein, N max is the maximum value of the first pressure values; N min is the minimum value of the first pressure values; M max is the maximum value of the second pressure values; k1 is the first coefficient; 1>k1≥0.8; some of the first pressure values are less than the minimum value of the first pressure range;

[0011] Step S50, based on crimping the terminal to the target mass-produced wire harness, obtain the third pressure value of the wire harness crimping the terminal;

[0012] Step S60, the step S60 includes step S61;

[0013] Step S61, based on the third pressure value being within the first pressure range, unload the crimped target mass-produced wire harness to the good product area.

[0014] In some embodiments, the step S20 includes: based on the wire harness type, perform a first sample test on multiple first wire harnesses, perform a second sample test on multiple second wire harnesses, and perform a third sample test on multiple third wire harnesses; wherein, the wire harness types of the first wire harness, the second wire harness, and the third wire harness are the same as the wire harness type of the target mass-produced wire harness; the first sample test is to test the first pressure value of all the copper wires of the first wire harness crimped into the terminal; the second sample test is to test the second pressure value of a first proportion of the copper wires of the second wire harness crimped into the terminal; the first proportion is the proportion of the number of copper wires of the second wire harness crimped into the terminal to the total number of copper wires; the first proportion is greater than 0 and less than 1; the third sample test is to test the third pressure value of a second proportion of the copper wires of the third wire harness crimped into the terminal; the second proportion is the proportion of the number of copper wires of the third wire harness crimped into the terminal to the total number of copper wires; the second proportion is greater than 0 and less than 1; the second proportion is less than the first proportion;

[0015] Step S30 includes: based on the completion of the first sample test, the second sample test, and the third sample test, obtaining the first pressure data of the first sample test, the second pressure data of the second sample test, and the third pressure data of the third sample test; wherein, the first pressure data includes a plurality of the first pressure values; the second pressure data includes a plurality of the second pressure values; the third pressure data includes a plurality of the third pressure values;

[0016] Step S40 further includes step S42;

[0017] Step S42 includes: based on the first pressure data and the third pressure data satisfying (N avg ×k2) > Q avg > 0, obtaining a second pressure range; wherein, N avg is the average value of the first pressure values; Q avg is the average value of the third pressure values; k2 is a second coefficient; 0.7 > k2 > 0.5; the second pressure range is 0 to Q avg ×1.2;

[0018] Step S60 further includes step S62;

[0019] Step S62 includes: based on the third pressure value being within the second pressure range, cutting the crimped target mass-produced wire harness to the defective area.

[0020] In some embodiments, step S60 further includes:

[0021] Step S63, based on the third pressure value being outside the first pressure range and outside the second pressure range, cutting the crimped target mass-produced wire harness to the pending area.

[0022] In some embodiments, the first ratio is 80% - 95%.

[0023] In some embodiments, the second ratio is 70% - 80%.

[0024] In some embodiments, the automotive wire harness terminal crimping method further includes step S70, and step S70 includes steps S71 to S73;

[0025] Step S71, based on the pending area being in the incoming material state, obtaining an image of the target mass-produced wire harness in the pending area;

[0026] Step S72, based on the completion of obtaining the image, judging the omission quantity of the copper wires leaking out of the target mass-produced wire harness to the outside of the terminals according to the image;

[0027] Step S73: Based on the omission quantity being 0, transfer the target mass-produced wire harness to the non-defective area.

[0028] In some embodiments, step S70 further includes:

[0029] Step S74: Based on the omission quantity being greater than 0, transfer the target mass-produced wire harness to the defective area.

[0030] In a second aspect, the present invention provides an automotive wire harness terminal crimping device, which is applied to any one of the automotive wire harness terminal crimping methods in the first aspect. The automotive wire harness terminal crimping device includes:

[0031] A first feeding component, which includes a first feeding base and a first driving part; the first feeding base is used for storing the target mass-produced wire harness; the first driving part is used for driving the first feeding base to convey the target mass-produced wire harness;

[0032] A second feeding component, which includes a second feeding base and a second driving part; the second feeding base is used for storing terminals; the second driving part is used for driving the second feeding base to convey the terminals;

[0033] A crimping component, which includes a crimping base, a third driving part, a lower die unit, an upper die unit, a cutting unit, and a traction unit; the lower die unit is detachably connected to the crimping base; the upper die unit is located above the lower die unit; the third driving part is used for driving the upper die unit to lift and lower; the upper die unit and the lower die unit are used for crimping the waterproof sleeve and copper wire of the target mass-produced wire harness into the terminal; the cutting unit is used for cutting the target mass-produced wire harness; the traction unit is used for clamping the target mass-produced wire harness;

[0034] A wire stripping component, which is used for stripping the insulating sleeve of the target mass-produced wire harness; the first driving part drives the first feeding base to alternately convey the target mass-produced wire harness to the crimping component and the wire stripping component;

[0035] A blanking component, which includes a non-defective area; the traction unit is used for conveying the target mass-produced wire harness to the blanking component;

[0036] A controller, which controls the traction unit to convey the target mass-produced wire harness to the blanking component.

[0037] In some embodiments, the blanking component further includes a defective area.

[0038] In some embodiments, the blanking component further includes a pending area.

[0039] To solve the problem of how to quickly determine whether the terminal crimping of an automotive wire harness is qualified, the present invention has the following advantages:

[0040] Obtain the wire harness type of the target mass-produced wire harness through step S10, determine its diameter and the number of copper wires, and provide basic parameters for subsequent tests; based on step S20, perform a first sample test of full copper wire crimping on the first wire harness of the same wire harness type, and at the same time perform a second sample test of partial copper wire crimping on the second wire harness to obtain a first pressure value and a second pressure value; through step S30, integrate the first pressure data and the second pressure data, and establish a determination condition N including the maximum value N of the first pressure value max , the minimum value N of the first pressure value min , the maximum value M of the second pressure value max and the coefficient k1, N max > M max > (N min × k1), and then derive the first pressure range according to the rules in step S41, which excludes some first pressure values that do not meet the threshold; use step S50 to detect the third pressure value of the terminal crimping of the target mass-produced wire harness in real time, and compare the third pressure value with the first pressure range through step S61. When the third pressure value is within the first pressure range, the wire harness is cut and sent to the good product area. In this way, the qualified working conditions where the copper wire is fully pressed into the terminal can be preferentially identified through pressure data, improving the efficiency of judging the quality of terminal crimping. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Shows a flowchart of automotive wire harness terminal crimping of an embodiment;

[0042] Figure 2 Shows a schematic diagram of a state of an automotive wire harness terminal crimping device of an embodiment;

[0043] Figure 3 Shows another schematic diagram of a state of an automotive wire harness terminal crimping device of an embodiment;

[0044] Figure 4 Shows a schematic diagram of the crimping assembly of an automotive wire harness terminal crimping device of an embodiment;

[0045] Figure 5 Shows Figure 4 The front view of the crimping assembly shown;

[0046] Figure 6 Shows Figure 4 The side view of the crimping assembly shown;

[0047] Figure 7 Shows Figure 4 The rear view of the crimping assembly shown;

[0048] Figure 8 Shows a schematic diagram of an automotive wiring harness according to an embodiment;

[0049] Figure 9 Shows a schematic diagram of a terminal according to an embodiment.

[0050] Reference numerals: first feeding assembly 10; first feeding base 11; first driving part 12; second feeding assembly 20; second feeding base 21; second driving part 22; crimping assembly 30; crimping base 31; lower die unit 32; upper die unit 33; cutting unit 34; wire stripping assembly 40; automotive wiring harness 50; insulating sleeve 51; core wire 52; waterproof sleeve 53; terminal 54; first crimping wing 541; second crimping wing 542; controller 60. Detailed implementation manners

[0051] Now, the present disclosure will be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0052] As used herein, the term "including" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Also, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0053] In this embodiment, the automotive wiring harness 50, as the network main body of the automotive circuit, is the core component that connects electrical and electronic components and realizes functions. As Figure 8 , Figure 9As shown, the automotive wire harness 50 includes an insulating sleeve 51, a core wire 52, a waterproof sleeve 53, and a terminal 54. The insulating sleeve 51 wraps around the outside of the core wire 52 composed of multiple copper wires. The waterproof sleeve 53 covers the outside of the insulating sleeve 51. Both are crimped to the inside of the terminal 54 at the exposed end of the copper wire. The terminal 54 wraps the waterproof sleeve 53 through the first crimping wing 541, and the second crimping wing 542 fixes the exposed end of the copper wire to form an electrical connection. The current production of the automotive wire harness 50 requires a special tool to strip the insulating layer at the end of the core wire 52, insert the exposed copper wire into the terminal 54 and then perform crimping. However, due to the positioning deviation during the crimping process, some of the core wire 52 is exposed outside the crimping area before the crimping die presses the core wire 52. The exposed core wire 52 will cause the anti-vibration performance of the connection part to decline, seriously affecting the electrical stability and durability of the wire harness. Therefore, to solve the above problems, the present invention provides a method for crimping the terminal 54 of the automotive wire harness 50, as Figure 1 shown, the method for crimping the terminal 54 of the automotive wire harness 50 may include steps S10 to S61, and the following may elaborate on steps S10 to S60.

[0054] Step S10, obtain the wire harness type of the target mass-produced wire harness, and the wire harness type includes the diameter of the target mass-produced wire harness and the number of copper wires.

[0055] Step S20, based on the completion of obtaining the wire harness type, conduct a first sample test on multiple first wire harnesses and a second sample test on multiple second wire harnesses. Among them, the wire harness types of the first wire harness and the second wire harness are the same as that of the target mass-produced wire harness. By ensuring the type consistency of the first wire harness and the second wire harness with the target mass-produced wire harness through the wire harness type, it is conducive to judging the standard for the qualification of the automotive wire harness 50. The first sample test is to test the first pressure value when all the copper wires of the first wire harness are crimped into the terminal 54, that is, the standard pressure value for crimping the automotive wire harness 50. The second sample test is to test the second pressure value when the first proportion of the copper wires of the second wire harness is crimped into the terminal 54. The first proportion is the proportion of the number of copper wires of the second wire harness crimped into the terminal 54 to the total number of copper wires, and the first proportion is less than 1. By deliberately exposing some of the copper wires of the second wire harness outside the terminal 54 and crimping the first proportion of the copper wires into the terminal 54 to obtain the second pressure value, a scenario where there are defects in the crimping process of the automotive wire harness 50 is thus simulated. Step S30, based on the completion of the first sample test and the second sample test, obtain the first pressure data of the first sample test and the second pressure data of the second sample test. Among them, the first pressure data includes multiple first pressure values, and the second pressure data includes multiple second pressure values. The first pressure data and the second pressure data can provide important data support for judging the crimping quality of the automotive wire harness 50 in subsequent steps.

[0056] Step S40, step S40 includes step S41, and the following may elaborate on step S41.

[0057] Step S41, based on the first pressure data and the second pressure data satisfying N max > M max > (N min × k1), obtain the first pressure range. Among them, N max is the maximum value of the first pressure value, N min is the minimum value of the first pressure value, M max is the maximum value of the second pressure value, k1 is the first coefficient, 1 > k1 ≥ 0.8. Some of the first pressure values are less than the minimum value of the first pressure range. Since when the copper wires of the automotive wire harness 50 are crimped, the more the number of copper wires, the greater the pressure required for crimping. Therefore, the first pressure value obtained through the first wire harness is greater than the second pressure value obtained through the second wire harness. Due to measurement errors and the difficulty in ensuring high pressure consistency for the same type of wire harness products, when some of the first pressure values overlap with some of the second pressure values, the part of the first pressure values with the smallest numerical values needs to be excluded, and then the remaining first pressure values are included in the first pressure range, and the maximum value of the first pressure range can be unrestricted. For example, the maximum value of the first pressure range can be equal to the maximum value of the first pressure value, or can be greater than the maximum value of the first pressure value. In this way, it is possible to avoid the situation where the measured pressure value is within the overlapping range of the first pressure data and the second pressure data when some copper wires are exposed, thus causing misjudgment. For example, when multiple first pressure values are 10.5, 10.2, 10.3, 9.9, 9.8, and multiple second pressure values are 9.5, 9.4, 9.6, 9.9, 9.8, excluding 9.9 and 9.8, the first pressure range is 10.5~10.2. In another embodiment, the first pressure range can also be 11~10.2, so as to avoid errors when judging whether the crimping quality of the automotive wire harness 50 is qualified. Using the maximum values of the first pressure value and the second pressure value as the judgment conditions for the first pressure range can improve the operation efficiency compared with calculating the average value, and thus improve the detection efficiency.

[0058] Step S50, based on crimping the terminal 54 of the target mass-produced wire harness, obtain the third pressure value of the wire harness crimping terminal 54.

[0059] Step S60, Step S60 includes Step S61, which will be described in detail below.

[0060] Step S61: Based on the third pressure value being within the first pressure range, it indicates that the target mass-produced wire harness meets the standard. Then, the crimped target mass-produced wire harness is unloaded to the good product area. By determining whether the third pressure value of the wire harness crimped terminal 54 is within the first pressure range, it can quickly judge whether the crimping of the automotive wire harness 50 is qualified. If part of it is qualified, it can be transferred to the next process, thereby effectively controlling the risk of copper wire exposure. In addition, for other target mass-produced wire harnesses outside the first pressure range, reinspection can be carried out. Since the number of wire harnesses for reinspection is reduced, the reinspection efficiency is improved.

[0061] In this embodiment, step S20 includes: Based on the wire harness type, perform the first sample test on multiple first wire harnesses, the second sample test on multiple second wire harnesses, and the third sample test on multiple third wire harnesses. Among them, the wire harness types of the first wire harness, the second wire harness, and the third wire harness are the same as that of the target mass-produced wire harness. By ensuring the consistency of the first wire harness, the second wire harness, and the third wire harness with the target mass-produced wire harness through the wire harness type, it is beneficial to judge the standard for whether the automotive wire harness 50 is qualified. The first sample test is to test the first pressure value when all the copper wires of the first wire harness are crimped into the terminal 54. The second sample test is to test the second pressure value when the first proportion of the copper wires of the second wire harness is crimped into the terminal 54. The first proportion is the proportion of the number of copper wires of the second wire harness crimped into the terminal 54 to the total number of copper wires, and the first proportion is greater than 0 and less than 1. The third sample test is to test the third pressure value when the second proportion of the copper wires of the third wire harness is crimped into the terminal 54. The second proportion is the proportion of the number of copper wires of the third wire harness crimped into the terminal 54 to the total number of copper wires. The second proportion is greater than 0 and less than 1, and the second proportion is less than the first proportion. The third pressure data includes multiple third pressure values. By deliberately exposing a part of the copper wires of the second proportion of the third wire harness outside the terminal 54 and crimping the second proportion of the copper wires into the terminal 54 to obtain the third pressure value, the pressure range where the wire harness crimping is unqualified can be confirmed through the third pressure value.

[0062] Step S30 includes: Based on the completion of the first sample test, the second sample test, and the third sample test, obtain the first pressure data of the first sample test, the second pressure data of the second sample test, and the third pressure data of the third sample test; among them, the first pressure data includes multiple first pressure values; the second pressure data includes multiple second pressure values; the third pressure data includes multiple third pressure values;

[0063] Step S40 also includes step S42, and the following can elaborate on what step S42 includes.

[0064] Step S42 includes: Based on the first pressure data and the third pressure data satisfying (N avg × k2) > Q avg > 0, obtain the second pressure range. Among them, N avgis the average value of the first pressure value, Q avg is the average value of the third pressure value. k2 is the second coefficient, 0.7 > k2 > 0.5, and the second pressure range is 0 to Q avg ×1.2. Since the difference between the third pressure data and the first pressure data is too large, using the average value method can make the judgment of the second pressure range more accurate, so as to better distinguish whether the target mass-produced wire harness blanking is qualified.

[0065] Among them, there is no limitation on the order of steps S41 and S42. After steps S41 and S42 are executed, step S50 is executed. Step S60 also includes step S62.

[0066] Step S62 includes: based on the third pressure value being within the second pressure range, blanking the target mass-produced wire harness with crimping to the defective area, and judging whether it is within the second pressure range through the third pressure value of the wire harness crimping terminal 54. If it meets the second pressure range, it means that the quality of the target mass-produced wire harness with crimping is unqualified and cannot be put into the market for use.

[0067] In this embodiment, step S60 also includes step S63, and the following can elaborate on step S63 in detail.

[0068] Step S63, based on the third pressure value being outside the first pressure range and outside the second pressure range, blank the target mass-produced wire harness with crimping to the pending area. When the target mass-produced wire harness with crimping is neither within the qualified pressure range nor within the unqualified pressure range, move the target mass-produced wire harness with crimping to the pending area, and conduct inspections through forms such as manual inspection and photos to confirm whether the target mass-produced wire harness with crimping is qualified, ensuring that all target mass-produced wire harnesses put into use are qualified products.

[0069] Among them, there is no limitation on the order of steps S61, S62, and S63.

[0070] In this embodiment, the first ratio is 80% - 95%. By limiting the crimping copper wire ratio, a scenario with slight defects in the crimping process of the automotive wire harness 50 is simulated.

[0071] In this embodiment, the second ratio is 70% - 80%. By reducing the copper wire crimping ratio, a scenario with severe defects in the crimping process of the automotive wire harness 50 is simulated.

[0072] In this embodiment, the method for crimping the terminal 54 of the automotive wire harness 50 further includes step S70, and step S70 includes steps S71 to S73. Among them, step S70 is executed after steps S61, S62, and S63 are all completed.

[0073] Step S71, based on the pending area being in the incoming material state, obtain the image of the target mass-produced wire harness in the pending area.

[0074] Step S72, based on the completion of image acquisition, determine the omission quantity of the copper wires of the target mass-produced wire harness leaking outside the terminal 54 according to the image.

[0075] Step S73, based on the omission quantity being 0, transfer the target mass-produced wire harness to the qualified product area. Verify the exposure of the copper wires through visual inspection, implement the review process for the to-be-determined products, and then transfer the qualified products to the qualified product area to achieve the classification of the target mass-produced wire harnesses in the to-be-determined area.

[0076] In this embodiment, step S70 further includes step S74, and the following can elaborate on step S74 in detail.

[0077] Step S74, based on the omission quantity being greater than 0, transfer the target mass-produced wire harness to the defective product area. Verify the exposure of the copper wires through visual inspection, implement the review process for the to-be-determined products, and then transfer the unqualified products to the defective product area to achieve the classification of the target mass-produced wire harnesses in the to-be-determined area, ensuring that the target mass-produced wire harnesses put into use are qualified products.

[0078] In this embodiment, the present invention provides a crimping device for the terminal 54 of the automotive wire harness 50. The crimping device for the terminal 54 of the automotive wire harness 50 is applied to the crimping method for the terminal 54 of the automotive wire harness 50 in any of the above embodiments. As Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 shown, the crimping device for the terminal 54 of the automotive wire harness 50 includes a first feeding component 10, a second feeding component 20, a crimping component 30, a wire stripping component 40, a blanking component, and a controller 60.

[0079] The first feeding component 10 may include a first feeding seat 11 and a first driving part 12. The first feeding seat 11 may be used for storing the target mass-produced wire harness. The first driving part 12 may be used for driving the first feeding seat 11 to convey the target mass-produced wire harness. By providing the first feeding seat 11 and the first driving part 12, the orderly storage and automatic conveyance of the target mass-produced wire harness are realized, and in cooperation with the structural design of alternately conveying to the crimping component 30 and the wire stripping component 40, an automated feeding process is formed, thereby improving production efficiency.

[0080] The second feeding component 20 may include a second feeding seat 21 and a second driving part 22. The second feeding seat 21 may be used for storing the terminals 54. The second driving part 22 may be used for driving the second feeding seat 21 to convey the terminals 54. By using the second feeding seat 21 and the second driving part 22 to convey the terminals 54, the precise matching and supply of the terminals 54 and the wire harness are ensured, effectively guaranteeing the material synchronization of the subsequent crimping process.

[0081] The pressing assembly 30 includes a pressing base 31, a third driving part, a lower die unit 32, an upper die unit 33, a cutting unit 34 and a traction unit. The lower die unit 32 is detachably connected to the pressing base 31. The upper die unit 33 is located above the lower die unit 32. The third driving part is used to drive the upper die unit 33 to move up and down. The upper die unit 33 and the lower die unit 32 are used to press the waterproof sleeve 53 and the copper wire of the target mass-produced wire harness into the terminal 54. The cutting unit 34 is used to cut the target mass-produced wire harness. The traction unit is used to clamp the target mass-produced wire harness.

[0082] The wire stripping assembly 40 is used to strip the insulating sleeve 51 of the target mass-produced wire harness. The first driving part 12 drives the first feeding base 11 to alternately convey the target mass-produced wire harness to the pressing assembly 30 and the wire stripping assembly 40, so as to avoid the efficiency loss caused by process waiting. Figure 2 It is the working state during the process of stripping the insulating sleeve 51. Figure 3 It is the working state during the crimping process of the terminal 54 after the insulating sleeve 51 is stripped.

[0083] The blanking assembly includes a good product area. The traction unit is used to convey the target mass-produced wire harness to the blanking assembly. By setting up an independent good product area and an automatic conveying device, the automatic classification and collection of the processed finished products are realized, thereby improving the production efficiency. The controller 60 controls the traction unit to convey the target mass-produced wire harness to the blanking assembly. A centralized control system is adopted to coordinate the action timing of each unit, and the accuracy of the material transmission path is ensured through programmed control, thereby maintaining the stability of the production process and the consistency of the products.

[0084] In this embodiment, the blanking assembly further includes a defective product area. The physical isolation of unqualified products is realized through the defective product area.

[0085] In this embodiment, the blanking assembly further includes a pending area. By setting up a pending area, a space for re-inspection processing is reserved.

[0086] In some other embodiments, the automotive wire harness 50 includes an insulating sleeve 51, a core wire 52, a waterproof sleeve 53, and a terminal 54. The core wire 52 is located on the inner peripheral wall of the insulating sleeve 51. The terminal 54 is connected to one end of the core wire 52. The waterproof sleeve 53 is wrapped around the outer peripheral wall of the insulating sleeve 51. The terminal 54 includes a first crimping wing 541 and a second crimping wing 542. The first crimping wing 541 is wrapped around the outer peripheral wall of the waterproof sleeve 53, and the second crimping wing 542 is wrapped around the outer peripheral wall of the exposed end of the copper wire.

[0087] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present disclosure, and in practical applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A method for crimping automotive wiring harness terminals, characterized in that, The method for crimping automotive wiring harness terminals includes: Step S10, obtaining the harness type of the target mass-produced harness, where the harness type includes the diameter of the target mass-produced harness and the number of copper wires; Step S20, after obtaining based on the harness type, conducting a first sample test on multiple first harnesses and a second sample test on multiple second harnesses; wherein, the harness types of the first harnesses and the second harnesses are the same as that of the target mass-produced harness; the first sample test is to test the first pressure value when all the copper wires of the first harness are crimped into the terminal; the second sample test is to test the second pressure value when a first proportion of the copper wires of the second harness are crimped into the terminal; the first proportion is the proportion of the number of copper wires of the second harness crimped into the terminal to the total number of copper wires; the first proportion is less than 1; Step S20 includes: based on the harness type, conducting a first sample test on multiple first harnesses, a second sample test on multiple second harnesses, and a third sample test on multiple third harnesses; wherein, the harness types of the first harnesses, the second harnesses, and the third harnesses are the same as that of the target mass-produced harness; the first sample test is to test the first pressure value when all the copper wires of the first harness are crimped into the terminal; the second sample test is to test the second pressure value when a first proportion of the copper wires of the second harness are crimped into the terminal; the first proportion is the proportion of the number of copper wires of the second harness crimped into the terminal to the total number of copper wires; the first proportion is greater than 0 and less than 1; the third sample test is to test the third pressure value when a second proportion of the copper wires of the third harness are crimped into the terminal; the second proportion is the proportion of the number of copper wires of the third harness crimped into the terminal to the total number of copper wires; the second proportion is greater than 0 and less than 1; the second proportion is less than the first proportion; Step S30, after the first sample test and the second sample test are completed, obtaining the first pressure data of the first sample test and the second pressure data of the second sample test; wherein, the first pressure data includes multiple first pressure values; the second pressure data includes multiple second pressure values; Step S30 includes: after the first sample test, the second sample test, and the third sample test are completed, obtaining the first pressure data of the first sample test, the second pressure data of the second sample test, and the third pressure data of the third sample test; wherein, the first pressure data includes multiple first pressure values; the second pressure data includes multiple second pressure values; the third pressure data includes multiple third pressure values; Step S40, Step S40 includes Step S41; Step S41, based on the first pressure data and the second pressure data satisfying N max > M max > (N min × k1), obtain the first pressure range; where N max is the maximum value of the first pressure value; N min is the minimum value of the first pressure value; M max is the maximum value of the second pressure value; k1 is the first coefficient; 1 > k1 ≥ 0.8; some of the first pressure values are less than the minimum value of the first pressure range; Step S40 further includes Step S42; The step S42 includes: obtaining a second pressure range based on that the first pressure data and the third pressure data satisfy (Navg×k2) > Qavg > 0; where Navg is the average value of the first pressure values; Qavg is the average value of the third pressure values; k2 is a second coefficient; 0.7 > k2 > 0.5; and the second pressure range is 0 to Qavg×1.2; Step S50, obtaining a third pressure value of the wire harness crimping the terminal based on crimping the terminal to the target mass-produced wire harness; Step S60, the step S60 includes step S61; Step S61, based on that the third pressure value is within the first pressure range, discharging the crimped target mass-produced wire harness to the good product area; The step S60 further includes step S62; The step S62 includes: based on that the third pressure value is within the second pressure range, discharging the crimped target mass-produced wire harness to the defective product area; The step S60 further includes: Step S63, based on that the third pressure value is outside the first pressure range and outside the second pressure range, discharging the crimped target mass-produced wire harness to the pending area.

2. The method for crimping an automotive wire harness terminal according to claim 1, wherein, The first ratio is 80% to 95%.

3. The method for crimping an automotive wire harness terminal according to claim 2, wherein, The second ratio is 70% to 80%.

4. The method for crimping an automotive wire harness terminal according to claim 1, wherein, The method for crimping an automotive wire harness terminal further includes step S70, and the step S70 includes steps S71 to S73; Step S71, obtaining an image of the target mass-produced wire harness in the pending area based on that the pending area is in the incoming material state; Step S72, based on that the acquisition of the image is completed, judging the omission quantity of the copper wires leaking out of the terminal outside the target mass-produced wire harness according to the image; Step S73, based on that the omission quantity is 0, transferring the target mass-produced wire harness to the good product area.

5. The method for crimping an automotive wire harness terminal according to claim 4, wherein, The step S70 further includes: Step S74, based on that the omission quantity is greater than 0, transferring the target mass-produced wire harness to the defective product area.

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