Processing method and jig for a connector terminal assembly

Abstract

The present disclosure relates to a processing method and jig for a connector terminal assembly, comprising: loading a plurality of conductive terminals into corresponding terminal holes of a connector housing, wherein the portion of each terminal hole close to the mating end of the connector housing forms a guide hole section extending in the mating direction; positioning the assembled connector terminal assembly relative to a detection jig, the detection jig having a plurality of detection contacts corresponding to the plurality of guide hole sections respectively; relatively approaching the connector terminal assembly and the detection jig in the mating direction, so that each detection contact enters the corresponding guide hole section and forms an electrical contact with the corresponding conductive terminal under the guidance and radial limitation of the hole wall of the guide hole section; detecting the electrical connection state of the circuit through each detection contact; reducing the risk of misinsertion, partial contact and unstable contact caused by the positioning deviation between the connector terminal assembly and the detection jig, reducing the risk of the conductive terminal being pushed and damaged during the detection process, thereby improving the accuracy of multi-terminal circuit detection.

Description

Technical Field

[0001] This disclosure relates to the field of connector technology, and more specifically, to a method and fixture for processing connector terminal assemblies. Background Technology

[0002] Connector terminal assemblies are crucial connection components in electrical equipment, enabling power transmission and signal delivery. They are widely used in vehicle controllers, battery management modules, motor control modules, and signal acquisition modules for industrial equipment. A connector terminal assembly typically includes a connector housing, multiple conductive terminals housed within the housing, and wires connecting to these terminals. Different conductive terminals can respectively handle the transmission of power, control, detection, or feedback signals. To ensure assembly quality and electrical connection reliability, after the conductive terminals are connected to the wires and installed in the connector housing, the electrical connection status of each conductive terminal's circuit is usually checked.

[0003] Current connector terminal assembly testing typically involves fixing the assembled connector terminal assembly at a testing station and aligning multiple testing contacts on a testing fixture, arranged according to the terminal arrangement, with the corresponding conductive terminals to perform electrical performance tests such as continuity and wiring sequence. This type of testing usually relies on the overall positioning of the connector terminal assembly and the testing fixture to ensure the mating positions of the multiple testing contacts. However, for connectors with a large number of densely arranged terminals, manufacturing errors in the connector housing, assembly deviations of the conductive terminals, and repetitive positioning errors of the testing fixture can easily accumulate. This can cause individual testing contacts to still deviate from their corresponding conductive terminals, resulting in misaligned or unstable contact, affecting the accuracy and stability of electrical connection status testing.

[0004] Therefore, existing technologies need to be improved to solve the problem that misalignment can easily occur due to positional deviations when multiple detection contacts are mated with corresponding conductive terminals, leading to inaccurate detection results. Summary of the Invention

[0005] The purpose of this disclosure is to provide a method and fixture for processing connector terminal assemblies to solve the above-mentioned technical problems.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, a method for processing a connector terminal assembly is provided, comprising: Multiple conductive terminals are inserted into corresponding terminal holes in the connector housing, wherein the portion of each terminal hole near the mating end of the connector housing forms a guide hole segment extending along the mating direction; The assembled connector terminal assembly is positioned relative to the testing fixture, which has multiple testing contacts corresponding to the multiple guide hole segments respectively; The connector terminal assembly and the detection fixture are brought closer together along the mating direction, so that each of the detection contacts enters the corresponding guide hole section and forms electrical contact with the corresponding conductive terminal under the guidance of the hole wall and radial limitation of the guide hole section; The electrical connection status of the circuit containing each conductive terminal is detected by each of the aforementioned detection contacts.

[0008] Optionally, bringing the connector terminal assembly and the testing fixture closer together along the mating direction specifically includes: While maintaining the reference positioning, each of the detection contacts is made to enter the corresponding guide hole segment, and the guide hole segment moves a preset guide stroke before forming an electrical contact with the corresponding conductive terminal; Each of the detection contacts continues to move under the radial limitation of the hole wall of the corresponding guide hole section until it forms an electrical contact with the corresponding conductive terminal.

[0009] Optionally, the process of bringing the connector terminal assembly and the detection fixture closer together along the mating direction includes a first movement phase and a second movement phase; During the first moving phase, the connector terminal assembly is brought closer to the detection fixture at a first relative speed until each of the detection contacts begins to enter the corresponding guide hole segment; During the second moving phase, each of the detection contacts continues to move along the corresponding guide hole segment at a second relative speed until it makes electrical contact with the corresponding conductive terminal. The second relative velocity is less than the first relative velocity.

[0010] Optionally, the process may further include the following after the second movement phase: Stop the relative movement between the connector terminal assembly and the detection fixture, and hold the connector terminal assembly and the detection fixture in the detection position after forming electrical contact for a preset stabilization time; Within the preset stabilization time, the circuit containing each conductive terminal is sampled multiple times. When the difference between the maximum and minimum values ​​among multiple samples of the same circuit is not greater than a preset fluctuation threshold, the electrical connection status of the circuit is determined based on the multiple sample values.

[0011] Optionally, the process of inserting the plurality of conductive terminals into the corresponding terminal holes includes: Establish a preset correspondence between each of the wires, each of the conductive terminals and each of the terminal holes, and install each of the conductive terminals into the corresponding terminal holes according to the preset correspondence; After each of the conductive terminals is inserted, a preset pull-back force is applied to the wire connected to the conductive terminal in the direction of the conductive terminal's withdrawal. The preset pull-back force is less than the design holding force between the conductive terminal and the corresponding terminal hole. When the axial displacement of the conductive terminal relative to the connector housing under the action of the preset pull-back force is not greater than the preset displacement threshold, it is determined that the conductive terminal is assembled in place; After all the conductive terminals are assembled, the connector terminal assembly is positioned relative to the testing fixture.

[0012] Optionally, the process of detecting the electrical connection status of the circuit containing each of the conductive terminals through each of the detection contacts includes: Detection signals are sequentially applied to the circuits containing each of the conductive terminals according to the preset correspondence; The detected actual continuity relationship is compared with the preset correspondence to determine whether there is an open circuit, short circuit or wiring error in each circuit; After ensuring that there are no open circuits, short circuits, or wiring errors in any of the circuits, the contact resistance of each circuit is detected and compared with a preset resistance threshold.

[0013] Optionally, the method for processing the connector terminal assembly further includes: When any of the circuits has an open circuit, short circuit, or incorrect wiring sequence, or when the contact resistance of any of the circuits is greater than the preset resistance threshold, the corresponding abnormal conductive terminal and terminal hole are determined according to the abnormal circuit and the preset correspondence. Depending on the type of abnormality, the abnormal conductive terminal is reinstalled, re-crimped and then reinstalled, or replaced and then reinstalled, and the abnormal conductive terminal is reassembled and confirmed to be in place after processing. The processed connector terminal assemblies are then repositioned, brought closer together, and tested for electrical connection status in sequence until each circuit is free of open circuits, short circuits, and wiring errors, and the contact resistance of each circuit is not greater than the preset resistance threshold.

[0014] The present invention also provides a processing fixture for connector terminal assemblies, which is applied to the processing method of connector terminal assemblies as described above. The processing fixture includes a fixture body, a positioning part, and a plurality of detection contacts. The positioning part is disposed on the fixture body and forms a positioning space that is adapted to the outer periphery of the connector housing; Multiple detection contacts are disposed on the fixture body and located on one side of the positioning space along the mating direction. Each detection contact extends along the mating direction and has an insertion end facing the positioning space and an electrical connection end facing away from the positioning space. When the connector housing is located in the positioning space, the insertion ends of the plurality of detection contacts are respectively opposite to the inlets of the plurality of guide hole segments along the mating direction.

[0015] Optionally, the insertion end of the detection contact is clearance-fitted with the corresponding guide hole segment, the maximum cross-sectional dimension of the insertion end is smaller than the minimum cross-sectional dimension of the corresponding guide hole segment, and a radial fit clearance is formed between the insertion end and the hole wall of the guide hole segment.

[0016] Optionally, the positioning part includes a supporting surface, two side limiting surfaces disposed opposite to each other on both sides of the supporting surface, and an end limiting surface disposed at the end of the supporting surface. The supporting surface, the two side limiting surfaces, and the end limiting surface together form the positioning space, and the end limiting surface is located on the side of the positioning space that is away from the plurality of detection contacts.

[0017] Optionally, each of the detection contacts is slidably connected to the fixture body along the mating direction, and an elastic reset member is provided between each of the detection contacts and the fixture body, wherein the elastic action direction of the elastic reset member is parallel to the mating direction.

[0018] Optionally, the fixture body includes a positioning seat and a detection seat disposed opposite to each other along the mating direction, the positioning part is disposed on the positioning seat, a plurality of detection contacts are disposed on the detection seat, and the detection seat is slidably connected to the positioning seat along the mating direction.

[0019] Optionally, the fixture body has a first detection area and a second detection area that are spaced apart, and the plurality of detection contacts include a first detection contact group disposed in the first detection area and a second detection contact group disposed in the second detection area; The arrangement of the first detection contact group corresponds to the distribution of the multiple power terminal holes of the connector housing, and the arrangement of the second detection contact group corresponds to the distribution of the multiple signal terminal holes of the connector housing. The maximum cross-sectional dimension of the insertion end of the first detection contact group is greater than the maximum cross-sectional dimension of the insertion end of the second detection contact group.

[0020] As can be seen from the above technical solutions, the exemplary embodiments disclosed herein possess at least the following advantages and positive effects: In some embodiments of this disclosure, the technical solutions are as follows: First, multiple conductive terminals, each connected with a wire, are inserted into corresponding terminal holes of the connector housing to form a connector terminal assembly. Then, the connector terminal assembly is positioned relative to the testing fixture, and multiple testing contacts on the testing fixture are aligned with the guide hole segments of each terminal hole. Subsequently, the connector terminal assembly and the testing fixture are brought closer together along the mating direction, and each testing contact enters the corresponding terminal hole under the guidance and radial limitation of the guide hole wall, and forms electrical contact with the corresponding conductive terminal. Finally, the electrical connection status of the circuit where each conductive terminal is located is detected by the testing contacts. This solution utilizes the guide hole segments formed by the connector housing itself to guide and radially limit the testing contacts hole by hole, enabling the testing contacts to accurately approach and contact the corresponding conductive terminals. This reduces mis-insertion, misalignment, and unstable contact caused by positioning deviations between the connector terminal assembly and the testing fixture, reduces the risk of conductive terminals being offset or damaged during the testing process, and thus improves the accuracy, stability, and repeatability of multi-terminal circuit testing.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This is a side view of the connector terminal assembly in the processing method of the connector terminal assembly in this embodiment.

[0023] Figure 2 This is a front view structural diagram of the mating end of the connector terminal assembly in the processing method of the connector terminal assembly in this embodiment.

[0024] Figure 3 This is a side view of the processing fixture used in the processing method of the connector terminal assembly of this embodiment.

[0025] Figure 4 This is a front view of the mating end of the processing fixture used in the processing method of the connector terminal assembly of this embodiment.

[0026] Figure 5 This is a partial cross-sectional view of the connector terminal assembly and the processing fixture in the mating state of this embodiment.

[0027] Illustrations: 100, Connector terminal assembly; 110, Connector housing; 111, Terminal hole; 112, Guide hole section; 113, Power terminal hole; 114, Signal terminal hole; 120, Conductive terminal; 200, Machining fixture; 210, Fixture body; 211, Positioning part; 220, Detection contact; 221, Insertion end; 222, Electrical connection end; 223, Radial fit clearance; 230, Elastic reset element; 240, Positioning seat; 250, Detection seat; 251, First detection area; 252, Second detection area; 260, First detection contact group; 270, Second detection contact group; Detailed Implementation Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0029] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0030] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0031] Figure 1 This is a side view of the connector terminal assembly in the processing method of the connector terminal assembly of this embodiment, which shows the relative arrangement between the connector housing 110 and the plurality of conductive terminals 120 of the connector terminal assembly 100.

[0032] Figure 2This is a front view of the mating end structure of the connector terminal assembly in the processing method of the connector terminal assembly of this embodiment, which shows the partitioning and arrangement relationship of multiple power terminal holes 113 and multiple signal terminal holes 114 on the connector housing.

[0033] Figure 3 This is a side view of the processing fixture used in the processing method of the connector terminal assembly of this embodiment, showing the relative arrangement of the fixture body 210, the detection contact 220, the first detection area 251, the second detection area 252 and the elastic reset member 230.

[0034] Figure 4 This is a front view of the mating end of the processing fixture used in the processing method of the connector terminal assembly of this embodiment. It shows the distribution relationship of the positioning part 211, the detection seat 250, the first detection contact group 260, the second detection contact group 270, and the insertion end 221 of each detection contact 220.

[0035] Figure 5 This is a partial cross-sectional view of the connector terminal assembly and the processing fixture in the mating state of this embodiment. It shows that the guide hole section 112 is a partial hole section of the terminal hole 111 near the mating end, and the mating relationship of the insertion end 221 of the detection contact 220 forming electrical contact with the conductive terminal 120 after being guided within the radial mating gap 223.

[0036] like Figures 1 to 5 As shown, a method for processing a connector terminal assembly 100 includes: S1, multiple conductive terminals 120, each connected with a wire, are inserted into the corresponding terminal holes 111 of the connector housing 110, wherein the portion of each terminal hole 111 near the mating end of the connector housing 110 forms a guide hole segment 112 extending along the mating direction.

[0037] Specifically, the conductive terminal 120 can be connected to the corresponding wire by crimping, welding, plugging or piercing. For smaller signal terminals, crimping is preferred to balance batch assembly efficiency and connection consistency.

[0038] Assembly can be performed from the side of the connector housing 110 away from the mating end. The insulating hole wall of the connector housing 110 separates each conductive terminal 120 from each other and forms an independent contact channel between the mating end and the corresponding conductive terminal 120. The entrance of the guide hole section 112 can be chamfered or rounded to reduce the possibility of interference between the edge of the hole and the detection contact 220 during subsequent mating. A wire lead-out position can also be provided with a wire fixing part or a stress relief part to reduce the impact of wire bending and pulling on the assembly posture of the conductive terminal 120.

[0039] S2, the assembled connector terminal assembly 100 is positioned relative to the testing fixture, the testing fixture having multiple testing contacts 220 corresponding to multiple guide hole segments 112 respectively.

[0040] Preferably, the connector terminal assembly 100 is fixed to the positioning seat 240 of the testing station, and the testing fixture is connected to the slider of the linear guide rail, thereby enabling the testing fixture to move along the actual mating direction of the connector terminal assembly 100. The outer contour, positioning shoulder, positioning groove, or guide edge of the connector housing 110 can form a mechanical engagement with the corresponding positioning surface on the testing station to limit the lateral offset and angular deviation of the connector terminal assembly 100 relative to the testing fixture, and to ensure that the positioning load is mainly borne by the connector housing 110, preventing the testing contact 220 from being subjected to lateral loads as an integral positioning component. In other embodiments, the testing fixture can be fixed while the connector terminal assembly 100 is moved, or the two can be moved separately, as long as their relative alignment can be maintained.

[0041] S3, bring the connector terminal assembly 100 and the testing fixture closer together in the mating direction, so that each testing contact 220 enters the corresponding guide hole section 112 and forms electrical contact with the corresponding conductive terminal 120 under the guidance of the hole wall of the guide hole section 112 and radial limitation.

[0042] It should be noted that the guide hole section 112 mainly performs local alignment of the detection contact 220 before electrical contact is formed, rather than relying on the conductive terminal 120 itself to withstand the impact of the detection contact 220 to achieve correction. After the detection contact 220 enters the guide hole section 112, the hole wall constrains its lateral displacement, ensuring that the detection contact 220 reaches the corresponding conductive terminal 120 along the mating direction, and reducing the possibility of the detection contact 220 colliding with the opening of the terminal hole 111 or adjacent structures. Each guide hole section 112 forms an independent guide channel, thus reducing the impact of small terminal size, dense arrangement, and manufacturing and assembly deviations on group mating, especially reducing the risk of small-sized conductive terminals 120 being misaligned, scratched, or bent during the testing process.

[0043] S4, the electrical connection status of the circuit containing each conductive terminal 120 is detected by each detection contact 220. Each detection contact 220 can be electrically connected to an external detection module through a corresponding lead wire. After the detection contact 220 makes electrical contact with the corresponding conductive terminal 120, the conductive terminal 120, the wire connected to it, and the external detection circuit together form a temporary detection channel, wherein the circuit containing the conductive terminal 120 includes at least the conductive terminal 120 and the wire connected to it.

[0044] The detection module can apply detection signals to the corresponding detection channels and acquire electrical responses. Based on the product technical requirements of the connector terminal assembly 100, it generates detection results for each circuit. The detection results for each circuit can be output separately or summarized to form the overall detection results for the connector terminal assembly 100. Thus, the electrical connection status screening can be completed before the product leaves the factory or enters subsequent assembly, and the detection status is made closer to the actual mating status of the connector terminal assembly 100.

[0045] The working principle of this invention is as follows: First, multiple conductive terminals 120, each connected with a wire, are inserted into the corresponding terminal holes 111 of the connector housing 110 to form a connector terminal assembly 100. Then, the connector terminal assembly 100 is positioned relative to the testing fixture, and multiple testing contacts 220 on the testing fixture are aligned with the guide hole sections 112 of each terminal hole 111. Subsequently, the connector terminal assembly 100 and the testing fixture are brought closer together along the mating direction, and each testing contact 220 enters the corresponding terminal hole 111 under the guidance and radial limitation of the guide hole section 112 wall, and contacts the corresponding conductive terminal 12. 0. Electrical contact is formed; finally, the electrical connection status of each conductive terminal 120 circuit is detected by the detection contact 220. This scheme uses the guide hole segment 112 formed by the connector housing 110 itself to guide and radially limit the detection contact 220 hole by hole, so that the detection contact 220 can accurately approach and contact the corresponding conductive terminal 120, reducing mis-insertion, misalignment and unstable contact caused by the positioning deviation between the connector terminal assembly 100 and the detection fixture, reducing the risk of the conductive terminal 120 being deflected or damaged during the detection process, thereby improving the accuracy, stability and repeatability of multi-terminal circuit detection.

[0046] In this embodiment, the process of bringing the connector terminal assembly 100 and the testing fixture closer together along the mating direction includes: While maintaining the reference positioning, each detection contact 220 is made to enter the corresponding guide hole section 112, and the guide hole section 112 moves a preset guide stroke before forming an electrical contact with the corresponding conductive terminal 120. Each detection contact 220 continues to move under the radial limit of the hole wall of the corresponding guide hole section 112 until it forms an electrical contact with the corresponding conductive terminal 120.

[0047] It should be noted that the preset guide stroke refers to the axial distance traveled by the detection contact 220 after entering the guide hole section 112 and mating with the conductive terminal 120 in the direction of forming an electrical contact front. This distance can be determined based on the axial depth of the guide hole section 112, the setting position of the conductive terminal 120 relative to the entrance of the guide hole section 112, and the corresponding manufacturing tolerances. Within the preset guide stroke, the detection contact 220 is at least partially located in the guide hole section 112, allowing the hole wall to laterally constrain and positionally correct the detection contact 220 before it contacts the conductive terminal 120, thereby forming a docking process of first guiding and then contacting. The preset guide stroke does not include the movement distance after electrical contact is formed.

[0048] After the detection contact 220 completes its preset guide stroke, at least a portion of it remains within the corresponding guide hole section 112 and continues to move along the mating direction under the radial constraint of the hole wall, so that the insertion end 221 of the detection contact 220 reaches the contact position of the corresponding conductive terminal 120. The detection contact 220 and the conductive terminal 120 can form a plug-in contact or an end-face abutment contact to establish a continuous conductive path. Since the lateral offset of the detection contact 220 is mainly limited by the guide hole section 112, the conductive terminal 120 does not need to bear the lateral force used to correct the position of the detection contact 220, thus reducing the risk of the conductive terminal 120 being deflected, scratched, or bent, and improving the consistency of simultaneous electrical contact formation by multiple detection contacts 220.

[0049] In this embodiment, the process of bringing the connector terminal assembly 100 and the detection fixture closer together along the mating direction includes a first moving stage and a second moving stage. In the first moving phase, the connector terminal assembly 100 is brought closer to the detection fixture at a first relative speed until each detection contact 220 begins to enter the corresponding guide hole section 112. In the second moving phase, each detection contact 220 continues to move along the corresponding guide hole section 112 at a second relative speed until it makes electrical contact with the corresponding conductive terminal 120; wherein the second relative speed is less than the first relative speed.

[0050] Specifically, the first relative velocity applies to the idle travel range before the detection contact 220 enters the guide hole section 112, thereby shortening the approach time between the connector terminal assembly 100 and the detection fixture. The termination position of the first movement phase can be predetermined based on the initial distance between the connector terminal assembly 100 and the detection fixture, the position of the entrance of the guide hole section 112, and the extension length of the detection contact 220. The first movement phase is considered to end when the insertion end 221 of the detection contact 220 reaches and begins to pass the entrance end face of the corresponding guide hole section 112. This phase can be achieved by the movement of the detection fixture, the movement of the connector terminal assembly 100, or both simultaneously, and the first relative velocity represents the rate of change of the relative distance between the two along the mating direction.

[0051] Preferably, after the detection contact 220 begins to enter the guide hole section 112, the drive mechanism reduces the relative speed between the connector terminal assembly 100 and the detection fixture, allowing the detection contact 220 to be guided by the hole wall at a lower speed and gradually approach the conductive terminal 120. A continuous deceleration transition can be used between the first and second movement stages to reduce mechanical vibration and inertial impact caused by sudden speed changes. The termination position of the second movement stage can be determined based on a pre-set relative displacement or based on the occurrence of an effective electrical response in the detection circuit, thereby preventing the detection contact 220 from directly impacting the conductive terminal 120 at a high speed.

[0052] It should be noted that the first relative velocity is mainly used to improve the movement efficiency of the non-contact zone, while the second relative velocity is mainly used to control the guiding insertion and electrical contact formation process. By adopting a movement mode of first approaching quickly and then docking at low speed, the impact generated when the detection contact 220 enters the guide hole section 112 and contacts the conductive terminal 120 can be reduced while taking into account the detection cycle time. This allows the hole wall sufficient time to laterally constrain the detection contact 220, thereby reducing the risk of misalignment of the detection contact 220, bending of the conductive terminal 120, and unstable contact position.

[0053] In this embodiment, the process further includes the following after the second moving phase: Stop the relative movement between the connector terminal assembly 100 and the testing fixture, and hold the connector terminal assembly 100 and the testing fixture in the testing position after forming electrical contact for a preset stabilization time; Specifically, after the second movement phase ends, the drive mechanism enters a position holding state, preventing the detection contact 220 from further increasing its insertion depth relative to the corresponding conductive terminal 120. The preset stabilization time is calculated from the moment the relative movement between the two stops, and can be determined based on the mechanical rebound time of the detection contact 220, the vibration decay time of the contact interface, and the response time of the detection module. During this period, the detection contact 220 maintains contact with the conductive terminal 120 to reduce the impact of movement inertia, mechanical vibration, and instantaneous contact changes on the detection results.

[0054] Within a preset stabilization time, multiple samples are taken from each circuit containing each conductive terminal 120. Preferably, for the same circuit, each sampling is performed under the same detection signal and the same contact position, using electrical response parameters of the same type and dimension. The same time interval can be set between each sampling, or different time intervals can be set according to the response characteristics of the detection module. Multiple circuits can be sampled sequentially or in parallel by a multi-channel detection module. When the detection signal is applied circuit by circuit as described later, the electrical response of each circuit can be sampled multiple times during the selection period, thereby obtaining a set of sampled values ​​reflecting the contact stability of that circuit.

[0055] When the difference between the maximum and minimum values ​​among multiple samples of the same circuit is not greater than a preset fluctuation threshold, the electrical connection status of the circuit is determined based on the multiple sample values.

[0056] It should be noted that the difference between the maximum and minimum values ​​is used to characterize the degree of electrical response fluctuation of the same circuit during the testing period. The preset fluctuation threshold can be determined based on the measurement accuracy of the testing module, the allowable contact fluctuation range, and the level of electrical interference at the site. When the difference between the maximum and minimum values ​​is not greater than the preset fluctuation threshold, the average, median, or effective stable value of multiple sampled values ​​can be used as the representative test value for the circuit, and the electrical connection status can be determined based on this representative test value. When the difference between the maximum and minimum values ​​is greater than the preset fluctuation threshold, the corresponding circuit can be marked as having unstable contact or invalid sampling, instead of directly making a pass / fail judgment based on a single instantaneous sampled value.

[0057] In this embodiment, the process of inserting multiple conductive terminals 120 into corresponding terminal holes 111 includes: S11, establish a preset correspondence between each wire, each conductive terminal 120 and each terminal hole 111, and install each conductive terminal 120 into the corresponding terminal hole 111 according to the preset correspondence; Specifically, the preset correspondence can be established based on the electrical principles of the connector terminal assembly 100, the distribution of terminal holes 111, and the wiring harness design, and can be recorded through hole numbering, wire color, wire marking, or assembly procedures. The preset correspondence includes at least the conductive terminal 120 connected to each wire and the terminal hole 111 corresponding to that conductive terminal 120, enabling assembly personnel or automated assembly equipment to complete the assembly according to the determined hole sequence, thereby reducing the possibility of incorrect installation, omission, and wiring sequence confusion of conductive terminals 120 from the source.

[0058] S12, after each conductive terminal 120 is installed, a preset pull-back force is applied to the wire connected to the conductive terminal 120 in the direction of withdrawal of the conductive terminal 120. The preset pull-back force is less than the design holding force between the conductive terminal 120 and the corresponding terminal hole 111. Preferably, the preset pull-back force is applied along the axial withdrawal direction of the conductive terminal 120 to avoid lateral pulling of the wire and causing the conductive terminal 120 to deflect. The preset pull-back force can be applied by a force gauge, a constant force traction mechanism, or an automatic assembly mechanism with force feedback function, and its magnitude can be determined according to the design holding force between the conductive terminal 120 and the terminal hole 111, the allowable tensile force of the wire, and the assembly tolerance. Since the preset pull-back force is less than the design holding force, the assembled conductive terminal 120 can be held in the terminal hole 111, while conductive terminals 120 that are not effectively held or not fully inserted are prone to identifiable axial movement.

[0059] S13, when the axial displacement of the conductive terminal 120 relative to the connector housing 110 under the action of the preset pull force is not greater than the preset displacement threshold, it is determined that the conductive terminal 120 is assembled in place. The axial displacement of the conductive terminal 120 relative to the connector housing 110 can be detected by a displacement sensor, a visual inspection device, or a measurement reference set opposite to the connector housing 110. The preset displacement threshold can be determined based on the allowable movement of the conductive terminal 120 after normal assembly, the elastic deformation of the structure, and the displacement detection accuracy.

[0060] When the axial displacement is not greater than the preset displacement threshold, it indicates that the conductive terminal 120 has been effectively constrained by the corresponding retaining structure in the terminal hole 111; when the axial displacement is greater than the preset displacement threshold, it indicates that the conductive terminal 120 may not be fully installed or the retaining structure may fail.

[0061] S14. After all conductive terminals 120 are assembled in place, the connector terminal assembly 100 is positioned relative to the testing fixture.

[0062] After all conductive terminals 120 are assembled and confirmed to be in place, the connector terminal assembly 100 is moved to the testing station, and a relative positional relationship is established with the testing fixture using the outer contour, positioning shoulder, positioning groove, or other positioning reference of the connector housing 110. This prevents incompletely installed conductive terminals 120 from entering the subsequent mating testing process, and prevents the testing contact 220 from further pushing, pushing back, or deflecting loose conductive terminals 120. Simultaneously, it ensures that subsequent electrical connection status testing is based on the premise that the terminal mechanical assembly is qualified.

[0063] In this embodiment, the process of detecting the electrical connection status of the circuit where each conductive terminal 120 is located through each detection contact 220 includes: S41, Apply detection signals to the circuits where each conductive terminal 120 is located in sequence according to the preset correspondence; Specifically, the detection module can control the channel switching circuit to sequentially select the circuits containing each conductive terminal 120 according to a preset correspondence, and apply a detection voltage, detection current, or pulse detection signal to the currently selected circuit. The amplitude and duration of the detection signal can be determined according to the rated parameters of the conductive terminal 120 and the wire to avoid electrical damage to the connector terminal assembly 100 during the detection process. When one circuit is selected, the remaining circuits can be in an open state or a high-impedance state to reduce signal crosstalk between different circuits.

[0064] S42, compare the detected actual continuity relationship with the preset correspondence to determine whether there is an open circuit, short circuit or wiring error in each circuit; The detection module can establish an actual continuity relationship based on the actual arrival of the detection signal at the conductive terminal 120 or detection channel, and compare the actual continuity relationship with the preset correspondence item by item. When the detection signal does not reach the preset target channel, it can be determined that there is an open circuit in the corresponding circuit; when the detection signal reaches other channels besides the preset target channel, it can be determined that there is a short circuit in the corresponding circuit; when the detection signal reaches a single channel other than the preset one, it can be determined that there is a corresponding error in the corresponding wire, conductive terminal 120, or terminal hole 111. By comparing the actual continuity relationship with the preset correspondence, the integrity of the circuit and the correctness of the terminal wiring sequence can be checked simultaneously.

[0065] S43. After confirming that there are no open circuits, short circuits, or wiring errors in each circuit, the contact resistance of each circuit is detected and compared with a preset resistance threshold.

[0066] It should be noted that contact resistance testing should only be performed after confirming the correct conduction relationship of each circuit. This avoids ambiguity in the contact resistance measurement object due to open circuits, short circuits, or incorrect wiring sequences. Contact resistance can be calculated based on the detection current applied to the corresponding circuit and the detected voltage drop, or it can be directly measured using a suitable resistance detection module. The preset resistance threshold can be determined according to the design requirements of the conductive terminal 120, the wires, and their connections. When the detected contact resistance is not greater than the preset resistance threshold, the contact performance of the corresponding circuit can be considered to meet the requirements. When the contact resistance is greater than the preset resistance threshold, it indicates that the corresponding circuit may have poor crimping, contact surface contamination, or insufficient contact.

[0067] It should be noted that the multiple sampling and sampling value fluctuation judgment are not separate detection processes from the loop electrical connection status detection, but are used to confirm the stability of the data on which the loop electrical connection status detection is based. Specifically, while the connector terminal assembly 100 and the detection fixture are in the detection position, the detection module sequentially selects the loops where each conductive terminal 120 is located according to a preset correspondence, and samples the electrical response of each loop multiple times during the selection period. When the difference between the maximum and minimum values ​​among the multiple sampling values ​​of the same loop is not greater than a preset fluctuation threshold, a representative detection value for the corresponding loop is determined from the multiple sampling values, and the loop to which the detection signal actually arrives is determined based on the representative detection value to obtain the actual continuity relationship. Subsequently, the actual continuity relationship is compared with the preset correspondence to determine whether there is an open circuit, short circuit, or wiring error in the corresponding loop. After confirming that there are no open circuits, short circuits, or wiring errors in any loop, contact resistance detection is performed. When the difference between the maximum and minimum values ​​among the multiple sampling values ​​is greater than the preset fluctuation threshold, the detection data of the corresponding loop is determined to be unstable data and is not directly used for the determination of the actual continuity relationship and contact resistance.

[0068] In this embodiment, the processing method further includes: S5. When any circuit has an open circuit, short circuit, or wiring error, or when the contact resistance of any circuit is greater than the preset resistance threshold, the corresponding abnormal conductive terminal 120 and terminal hole 111 are determined according to the abnormal circuit and the preset correspondence. Specifically, the detection module records the channel number and anomaly type of the abnormal circuit, and queries the corresponding wire, conductive terminal 120, and terminal hole 111 position through a preset correspondence. For circuits with open circuits or contact resistance exceeding a preset resistance threshold, the corresponding single conductive terminal 120 and its corresponding terminal hole 111 can be identified; for short circuits or incorrect wiring sequences, multiple conductive terminals 120 and terminal holes 111 corresponding to two or more related circuits can be identified simultaneously. It should be noted that the identified terminal hole 111 is the hole position to be inspected where the abnormal conductive terminal 120 is located, and does not necessarily mean that the terminal hole 111 itself has a structural defect. This allows the detection results to be converted into a clear assembly troubleshooting location.

[0069] S6. Depending on the type of abnormality, reinstall, re-crimp and reinstall or replace the abnormal conductive terminal 120 and re-assemble and confirm that the abnormal conductive terminal 120 has been reassembled. Preferably, when the abnormal conductive terminal 120 is not fully installed, but the conductive terminal 120 and its connection with the wire are normal, the abnormal conductive terminal 120 can be removed or adjusted and then reinstalled into the corresponding terminal hole 111. When there is loose crimping, crimping position misalignment, or insufficient crimping deformation between the conductive terminal 120 and the wire, the abnormal conductive terminal 120 can be removed, crimped again, and then reinstalled into the corresponding terminal hole 111. When the abnormal conductive terminal 120 has bending, wear, breakage, or other defects that cannot be eliminated by reinstallation and re-crimping, the conductive terminal 120 can be replaced, and the replaced conductive terminal 120 can be connected to the corresponding wire and then installed into the original terminal hole 111. After processing, the assembly is re-confirmed according to the same pull-back force and axial displacement judgment method as the initial assembly to ensure that the processed conductive terminal 120 is effectively constrained by the retaining structure within the terminal hole 111.

[0070] S7, the processed connector terminal assembly 100 is re-positioned, re-approached and electrical connection status detected in sequence until there are no open circuits, short circuits and wiring errors in each circuit, and the contact resistance of each circuit is not greater than the preset resistance threshold.

[0071] When the processed connector terminal assembly 100 re-enters the testing process, its relative positioning with the testing fixture is first restored. Then, the two are brought closer together along the mating direction, allowing the testing contact 220 to form electrical contact with each conductive terminal 120 through the corresponding guide hole section 112. Subsequently, the sampling stability judgment, actual continuity comparison, and contact resistance detection are re-performed. The re-testing can be performed on all circuits of the connector terminal assembly 100 to confirm that the processing operation not only eliminated the original abnormal circuits but also did not adversely affect the wiring sequence, continuity, and contact performance of other circuits. For circuits that still do not meet the requirements after re-testing, the corresponding conductive terminal 120 and terminal hole 111 positions are determined again based on the test results and processed until all circuits meet the corresponding electrical connection requirements.

[0072] Example 2: Combination Figures 1 to 5 As shown, the present invention also provides a processing fixture 200 for a connector terminal assembly 100, which is applied to the processing method of the connector terminal assembly 100 as described in Embodiment 1. The processing fixture 200 includes a fixture body 210, a positioning part 211 and a plurality of detection contacts 220. The positioning part 211 is disposed on the fixture body 210 and forms a positioning space that is adapted to the outer periphery of the connector housing 110; Multiple detection contacts 220 are disposed on the fixture body 210 and located on one side of the positioning space along the mating direction. Each detection contact 220 extends along the mating direction and has an insertion end 221 facing the positioning space and an electrical connection end 222 facing away from the positioning space. When the connector housing 110 is in the positioning space, the insertion ends 221 of the multiple detection contacts 220 are respectively opposite to the inlets of the multiple guide hole sections 112 along the mating direction.

[0073] In use, the connector housing 110 is first placed into the positioning space enclosed by the positioning part 211. The lateral movement and angular deflection of the connector housing 110 are restricted by the cooperation between the positioning part 211 and the outer periphery of the connector housing 110, so that the insertion end 221 of each detection contact 220 faces the entrance of the corresponding guide hole section 112. Then, the processing fixture 200 and the connector terminal assembly 100 are brought closer together in the mating direction, and the insertion end 221 of each detection contact 220 enters the corresponding guide hole section 112, and reaches the contact position of the corresponding conductive terminal 120 under the guidance and radial limitation of the hole wall of the guide hole section 112. Each detection contact 220 is connected to the external detection module through the electrical connection end 222 facing away from the positioning space to establish a corresponding detection circuit and complete the electrical connection status detection. After the detection is completed, the processing fixture 200 and the connector terminal assembly 100 are separated in opposite directions, and the connector terminal assembly 100 can be removed.

[0074] In this embodiment, the insertion end 221 of the detection contact 220 is clearance-fitted with the corresponding guide hole section 112. The maximum cross-sectional dimension of the insertion end 221 is smaller than the minimum cross-sectional dimension of the corresponding guide hole section 112, and a radial fit clearance 223 is formed between the insertion end 221 and the hole wall of the guide hole section 112.

[0075] It should be noted that the cross-sections of the insertion end 221 and the guide hole section 112 refer to the cross-sections perpendicular to the mating direction. By making the maximum cross-sectional dimension of the insertion end 221 smaller than the minimum cross-sectional dimension of the guide hole section 112, it can be ensured that the insertion end 221 can smoothly enter the guide hole section 112 even with manufacturing tolerances and slight positional deviations, avoiding jamming. The radial mating clearance 223 can be determined based on the machining tolerance of the detection contact 220, the dimensional tolerance of the guide hole section 112, and the allowable mating deviation. This clearance provides the necessary entry allowance for the insertion end 221 without weakening the radial restraining effect of the hole wall on the insertion end 221 due to excessive clearance, thus balancing smooth insertion and guiding accuracy.

[0076] In this embodiment, the positioning part 211 includes a supporting surface, two side limiting surfaces disposed opposite to each other on both sides of the supporting surface, and an end limiting surface disposed at the end of the supporting surface. The supporting surface, the two side limiting surfaces and the end limiting surface together form a positioning space, and the end limiting surface is located on the side of the positioning space that is away from the multiple detection contacts 220.

[0077] Specifically, after the connector housing 110 is placed in the positioning space, its bottom or corresponding bearing portion is supported on the support surface. Two side limiting surfaces are located on either side of the connector housing 110 to restrict the lateral movement and rotation of the connector housing 110 along a direction perpendicular to the mating direction. An end limiting surface is located on the side of the connector housing 110 facing away from the detection contact 220, used to restrict the connector housing 110 from retracting along the mating direction during the insertion of the detection contact 220, and to withstand the axial reaction force generated when the detection contact 220 contacts the conductive terminal 120. The support surface, the two side limiting surfaces, and the end limiting surface constrain the connector housing 110 from different directions, enabling the establishment of a stable positioning space without obstructing the entrance of the guide hole section 112.

[0078] In this embodiment, each detection contact 220 is slidably connected to the fixture body 210 along the mating direction, and an elastic reset member 230 is provided between each detection contact 220 and the fixture body 210. The elastic action direction of the elastic reset member 230 is parallel to the mating direction.

[0079] Preferably, the fixture body 210 may be provided with sliding holes or guide sleeves corresponding to each detection contact 220. The detection contact 220 passes through the corresponding sliding hole or guide sleeve and can move independently along the mating direction. One end of the elastic reset member 230 acts on the fixture body 210, and the other end acts on the corresponding detection contact 220. When the detection contact 220 continues to be subjected to axial force after contacting the conductive terminal 120, the detection contact 220 slides relative to the fixture body 210 and compresses the elastic reset member 230, so that the elastic reset member 230 applies an elastic contact force toward the conductive terminal 120 to the detection contact 220. Each detection contact 220 can independently perform axial compensation to adapt to the contact position deviation between different conductive terminals 120 and reduce terminal damage caused by rigid collisions. After the processing fixture 200 is withdrawn, the elastic reset member 230 drives the corresponding detection contact 220 to return to its initial position.

[0080] In this embodiment, the fixture body 210 includes a positioning seat 240 and a detection seat 250 arranged opposite to each other along the pairing direction. The positioning part 211 is disposed on the positioning seat 240, and a plurality of detection contacts 220 are disposed on the detection seat 250. The detection seat 250 is slidably connected to the positioning seat 240 along the pairing direction.

[0081] The positioning seat 240 supports the positioning part 211 and the connector terminal assembly 100 located within the positioning space, while the detection seat 250 supports multiple detection contacts 220. The positioning seat 240 and the detection seat 250 are slidably connected via linear guides, guide rods, sliding holes, or other linear guide structures, constraining the movement direction of the detection seat 250 relative to the positioning seat 240 and ensuring it aligns with the mating direction. In use, the positioning seat 240 can be held fixed, and the detection seat 250 can be moved closer to or away from the positioning seat 240 via a manual drive mechanism, pneumatic drive mechanism, or electric linear drive mechanism, thereby completing the insertion and removal of the detection contacts 220. The separate sliding arrangement of the positioning seat 240 and the detection seat 250 separates the positioning function of the connector housing 110 from the movement function of the detection contacts 220, maintaining their alignment during movement.

[0082] In this embodiment, the fixture body 210 has a first detection area 251 and a second detection area 252 that are spaced apart, and a plurality of detection contacts 220 include a first detection contact group 260 disposed in the first detection area 251 and a second detection contact group 270 disposed in the second detection area 252. The arrangement of the first detection contact group 260 corresponds to the distribution of the multiple power terminal holes 113 of the connector housing 110, and the arrangement of the second detection contact group 270 corresponds to the distribution of the multiple signal terminal holes 114 of the connector housing 110. The maximum cross-sectional dimension of the insertion end 221 of the first detection contact group 260 is greater than the maximum cross-sectional dimension of the insertion end 221 of the second detection contact group 270.

[0083] Specifically, the first detection area 251 corresponds to the power terminal hole 113 area on the connector housing 110, and the second detection area 252 corresponds to the signal terminal hole 114 area. The spacing between these areas reduces interference between the two types of detection contacts 220 during installation and mating. The first detection contact group 260 is arranged according to the hole positions and spacing of the multiple power terminal holes 113, and the second detection contact group 270 is arranged according to the hole positions and spacing of the multiple signal terminal holes 114, allowing each detection contact 220 to enter its corresponding guide hole section 112. The insertion end 221 of the first detection contact group 260 has a larger maximum cross-sectional dimension to accommodate the relatively large power terminal holes 113 and corresponding conductive terminals 120; the insertion end 221 of the second detection contact group 270 has a smaller maximum cross-sectional dimension to accommodate the smaller and more densely arranged signal terminal holes 114. Thus, the same processing fixture 200 can perform mating inspection on conductive terminals 120 of different sizes and distributions.

[0084] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0085] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A method for processing a connector terminal assembly, characterized in that, include: Multiple conductive terminals are inserted into corresponding terminal holes in the connector housing, wherein the portion of each terminal hole near the mating end of the connector housing forms a guide hole segment extending along the mating direction. The assembled connector terminal assembly is positioned relative to the testing fixture, which has multiple testing contacts corresponding to the multiple guide hole segments respectively; The connector terminal assembly and the detection fixture are brought closer together along the mating direction, so that each detection contact enters the corresponding guide hole section and forms an electrical contact with the corresponding conductive terminal under the guidance of the hole wall and radial limitation of the guide hole section; The electrical connection status of the circuit where each of the conductive terminals is located is detected by each of the detection contacts. Specifically, bringing the connector terminal assembly and the testing fixture closer together along the mating direction includes: While maintaining the reference positioning, each of the detection contacts is made to enter the corresponding guide hole segment, and the guide hole segment moves a preset guide stroke before forming an electrical contact with the corresponding conductive terminal; Each of the detection contacts continues to move under the radial limitation of the hole wall of the corresponding guide hole section until it forms an electrical contact with the corresponding conductive terminal; The process of bringing the connector terminal assembly and the detection fixture closer together along the mating direction includes a first movement stage and a second movement stage. During the first moving phase, the connector terminal assembly is brought closer to the detection fixture at a first relative speed until each of the detection contacts begins to enter the corresponding guide hole segment; During the second moving phase, each of the detection contacts continues to move along the corresponding guide hole segment at a second relative speed until it makes electrical contact with the corresponding conductive terminal. The second relative velocity is less than the first relative velocity.

2. The method for processing the connector terminal assembly according to claim 1, characterized in that, Following the second movement phase, the following is also included: Stop the relative movement between the connector terminal assembly and the detection fixture, and hold the connector terminal assembly and the detection fixture in the detection position after forming electrical contact for a preset stabilization time; Within the preset stabilization time, the circuit containing each conductive terminal is sampled multiple times. When the difference between the maximum and minimum values ​​among multiple samples of the same circuit is not greater than a preset fluctuation threshold, the electrical connection status of the circuit is determined based on the multiple sample values.

3. The method for processing the connector terminal assembly according to claim 1, characterized in that, The process of inserting the plurality of the conductive terminals into the corresponding terminal holes includes: Establish a preset correspondence between each wire, each of the conductive terminals and each of the terminal holes, and install each of the conductive terminals into the corresponding terminal holes according to the preset correspondence; After each of the conductive terminals is inserted, a preset pull-back force is applied to the wire connected to the conductive terminal in the direction of the conductive terminal's withdrawal. The preset pull-back force is less than the design holding force between the conductive terminal and the corresponding terminal hole. When the axial displacement of the conductive terminal relative to the connector housing under the action of the preset pull-back force is not greater than the preset displacement threshold, it is determined that the conductive terminal is assembled in place; After all the conductive terminals are assembled, the connector terminal assembly is positioned relative to the testing fixture.

4. The method for processing the connector terminal assembly according to claim 3, characterized in that, The process of detecting the electrical connection status of the circuit containing each of the conductive terminals through each of the aforementioned detection contacts includes: Detection signals are sequentially applied to the circuits containing each of the conductive terminals according to the preset correspondence; The detected actual continuity relationship is compared with the preset correspondence to determine whether there is an open circuit, short circuit or wiring error in each circuit; After ensuring that there are no open circuits, short circuits, or wiring errors in any of the circuits, the contact resistance of each circuit is detected and compared with a preset resistance threshold.

5. The method for processing the connector terminal assembly according to claim 4, characterized in that, Also includes: When any of the circuits has an open circuit, short circuit, or incorrect wiring sequence, or when the contact resistance of any of the circuits is greater than the preset resistance threshold, the corresponding abnormal conductive terminal and terminal hole are determined according to the abnormal circuit and the preset correspondence. Depending on the type of abnormality, the abnormal conductive terminal is reinstalled, re-crimped and then reinstalled, or replaced and then reinstalled, and the abnormal conductive terminal is reassembled and confirmed to be in place after processing. The processed connector terminal assemblies are then repositioned, brought closer together, and tested for electrical connection status in sequence until each circuit is free of open circuits, short circuits, and wiring errors, and the contact resistance of each circuit is not greater than the preset resistance threshold.

6. A processing fixture for connector terminal assemblies, characterized in that, A method for processing connector terminal assemblies as described in any one of claims 1 to 5, wherein the processing fixture includes a fixture body, a positioning part, and a plurality of detection contacts; The positioning part is disposed on the fixture body and forms a positioning space that is adapted to the outer periphery of the connector housing; Multiple detection contacts are disposed on the fixture body and located on one side of the positioning space along the mating direction. Each detection contact extends along the mating direction and has an insertion end facing the positioning space and an electrical connection end facing away from the positioning space. When the connector housing is located in the positioning space, the insertion ends of the plurality of detection contacts are respectively opposite to the inlets of the plurality of guide hole segments along the mating direction.

7. The processing fixture for the connector terminal assembly according to claim 6, characterized in that, The insertion end of the detection contact is clearance-fitted with the corresponding guide hole section. The maximum cross-sectional dimension of the insertion end is smaller than the minimum cross-sectional dimension of the corresponding guide hole section, and a radial fit clearance is formed between the insertion end and the hole wall of the guide hole section.

8. The processing fixture for the connector terminal assembly according to claim 6, characterized in that, The positioning part includes a supporting surface, two side limiting surfaces disposed opposite to each other on both sides of the supporting surface, and an end limiting surface disposed at the end of the supporting surface. The supporting surface, the two side limiting surfaces and the end limiting surface together form the positioning space, and the end limiting surface is located on the side of the positioning space that is away from the plurality of detection contacts.

9. The processing fixture for the connector terminal assembly according to claim 6, characterized in that, Each of the detection contacts is slidably connected to the fixture body along the mating direction, and an elastic reset member is provided between each of the detection contacts and the fixture body. The elastic action direction of the elastic reset member is parallel to the mating direction.

10. The processing fixture for the connector terminal assembly according to claim 6, characterized in that, The fixture body includes a positioning seat and a detection seat arranged opposite to each other along the pairing direction. The positioning part is disposed on the positioning seat, and a plurality of detection contacts are disposed on the detection seat. The detection seat is slidably connected to the positioning seat along the pairing direction.

11. The processing fixture for the connector terminal assembly according to claim 6, characterized in that, The fixture body has a first detection area and a second detection area that are spaced apart, and the plurality of detection contacts include a first detection contact group disposed in the first detection area and a second detection contact group disposed in the second detection area; The arrangement of the first detection contact group corresponds to the distribution of the multiple power terminal holes of the connector housing, and the arrangement of the second detection contact group corresponds to the distribution of the multiple signal terminal holes of the connector housing. The maximum cross-sectional dimension of the insertion end of the first detection contact group is greater than the maximum cross-sectional dimension of the insertion end of the second detection contact group.

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