Preparation method of connector with secondary lock

Abstract

The invention provides a preparation method of a connector with a secondary lock, and the method comprises the steps: axially stripping a cut cable sheath, reversely sleeving the periphery of a shielding ring with a braided wire, and cutting the cable again until an internal core wire is exposed, thereby saving the braided wire material, and improving the production efficiency. On the other hand, the shielding effect on unexpected signals can be achieved through the weaving wires arranged on the periphery of the shielding ring in a sleeving mode, and therefore the transmission stability of the expected signals is improved; besides, by reversely sleeving the braided wire between the periphery of the shielding ring and the inner wall of the outer conductor, a radial gap between the periphery of the shielding ring and the inner wall of the outer conductor can be filled, stable positioning of the internal shielding ring after crimping of the outer conductor is ensured, and unexpected radial deformation of the shielding ring during installation and use is avoided. The service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of signal connectors, and in particular to a method for preparing a connector with a secondary lock. Background Art

[0002] The connector is composed of a pair of male and female plugs that plug into each other to achieve the transmission of signals or messages. In order to ensure the axial positioning stability of the outer conductor and the terminal inside the plastic shell, a secondary lock is often added to the outside of the plastic shell to achieve the axial limiting effect on the outer conductor.

[0003] The preparation process of connectors in the prior art is often completed by combining automatic production on an assembly line with manual cooperation. However, the following defects and deficiencies still exist in actual use: 1) The pursuit of high automation in the assembly line often leads to rough cutting process and waste of raw materials, and at the same time, it cannot guarantee effective sealing packaging and signal shielding effects; 2) The existing technology does not consider the impact of cutting residue, and the preset spacing reserved for the shielding ring is insufficient, which affects the crimping effect of the shielding ring, and further affects the overall quality and service life of the connector; 3) The inspection process of the connector is often set after the overall molding of the connector. There is no inspection process for the sheath cutting, terminal crimping, and outer conductor crimping steps. Therefore, once one of the steps is wrong, the subsequent steps will be wasted, thus reducing manufacturing efficiency and finished product accuracy; Therefore, there is an urgent need to provide a method for preparing a connector to solve the defects and shortcomings in the above-mentioned prior art. Summary of the invention

[0004] In order to solve the defects and shortcomings in the prior art, the present invention provides a method for preparing a connector with a secondary lock.

[0005] The specific scheme provided by the present invention is: A method for preparing a connector with a secondary lock, characterized in that it comprises the following steps: S1: Select a preset length of sheath on the cable and cut it; S2: Axially peel off the cut cable sheath to expose the internal aluminum foil and braided wire, and crimp the shielding ring in the braided wire area; S3: Check the crimping position of the shielding ring and cut off the cable; S4: Axially peel off the cut cable sheath, reversely cover the braided wire on the outer circumference of the shielding ring, and re-cut the cable until the inner core wire is exposed; S5: Crimp the terminal onto the outer periphery of the core wire; S6: Check the crimping condition of the terminal; S7: Insert the cable with the crimped terminal into the outer conductor, and then crimp the outer conductor onto the outer circumference of the cable; S8: Check the crimping condition of the outer conductor; S9: Push the crimped outer conductor into the plastic shell, and repeat this process until the plastic shell is assembled; S10: Install the secondary locks on the outside of the plastic shell and press all the secondary locks evenly to ensure that the secondary locks are assembled with the plastic shell.

[0006] As a further preferred embodiment of the present invention, the cable is RG174 cable, the preset length of the sheath after cutting and stripping is L1, the axial length of the shielding ring is L2, and L1>4L2 is satisfied.

[0007] As a further preferred embodiment of the present invention, the step S2 includes the following steps: S2.1: The cut cable sheath is axially peeled off and separated from the fixed sheath by a preset distance L3, and L1>L3>L2 is satisfied, so as to expose the internal aluminum foil and braided wire; S2.2: Determine a position of a first preset distance J1 from the fixed sheath in the braided wire area, and determine a position of a second preset distance J2 from the stripped sheath; S2.3: Crimp the shielding ring at the position determined in step S2.2.

[0008] As a further preferred embodiment of the present invention, the step S3 includes the following steps: S3.1: Check and confirm that the first preset distance J1 between the shielding ring and the fixed sheath on one side meets the preset requirements; S3.2: Detect and confirm that the first preset spacing J1 can meet the accommodation requirement of the excess material on one side of the shielding ring; S3.3: Check and confirm that the second preset distance J2 between the shielding ring and the other side of the stripped sheath meets the preset requirements; S3.4: Detect and confirm that the second preset spacing J2 can meet the accommodation requirement of the remaining material on the other side of the shielding ring; S3.5: Remove the excess sheath outside the sheath together with the internal cable.

[0009] As a further preferred embodiment of the present invention, the step S4 includes the following steps: S4.1: Strip the cut cable jacket axially from the cable; S4.2: The braided wire on the side of the shielding ring away from the fixed sheath is placed on the outer periphery of the shielding ring in a direction close to the fixed sheath; S4.3: Preset the values ​​of the first and second axial lengths on the wire stripping machine; S4.4: Strip the cable using a wire stripping machine; S4.5: First, cut off the aluminum foil so that the first axial length of the internal insulation part exposed is L4; And satisfy: L2<L4; S4.6: Cut off the insulation part again, so that the second axial length of the inner core wire exposed is L5; And it satisfies: L4-L5<L5.

[0010] As a further preferred embodiment of the present invention, the step S5 includes the following steps: S5.1: Determine the axial distance between the front end of the terminal and the rear end of the shield ring; S5.2: Determine the axial distance between the front end of the terminal and the front end of the shielding ring; S5.3: Place the terminal crimping portion over the outer periphery of the core wire; S5.4: Crimp the terminal and crimp the terminal crimping portion into a B-shaped cross-section.

[0011] As a further preferred embodiment of the present invention, step S6 includes the following steps: S6.1: Check and verify that the end of the wire extending from the crimping portion of the terminal is visible but does not contact the end of the sleeve portion of the terminal; S6.2: Check and confirm that the core wire does not extend radially from the crimping portion of the terminal; S6.3: Check and confirm that the axial deviation between the core wire and the terminal crimping part does not exceed the preset value; S6.4: Check and confirm that the axial deviation between the terminal and the cable does not exceed the preset value; S6.5: Check and verify that the sum of the deflections of the terminals relative to the cable does not exceed a preset value; S6.6: Check and confirm that the crimping cross-section shape of the terminal crimping portion is B-shaped, and that the length and width of the B-shaped cross-section meet the preset requirements.

[0012] As a further preferred embodiment of the present invention, the step S7 includes the following steps: S7.1: Align and insert the crimped cable into the outer conductor; S7.2: Continue to feed the cable until the fixed sheath is located at the crimped portion of the outer conductor; S7.3: Check and confirm that the axial distance between the front end of the terminal and the front end of the outer conductor meets the preset requirements; S7.4: Check and confirm that the concentricity between the axis of the terminal and the axis of the outer conductor meets the preset requirements; S7.5: Crimp the outer conductor to the outer circumference of the cable; As a further preferred embodiment of the present invention, the step S8 includes the following steps: S8.1: Check and confirm that the tolerances of the outer conductor crimping part, the sheath crimping part, the waist crimping part and the shield ring crimping part meet the preset requirements respectively; S8.2: Detect and confirm that the axial deviation of the outer conductor crimping part, the sheath and the shielding ring after crimping meets the preset requirements; S8.3: Check and confirm that the front end of the outer conductor can rotate freely within the ring gauge; S8.4: Perform a tensile test on the cable after crimping. Fix the cable fixing sheath on the rear side of the outer conductor in the fixture, fix the connection position between the outer conductor sleeve and the outer conductor crimping part on the force-applying part of the test device, and apply tension through the force-applying part of the test device to test and confirm that the cable will not be deformed or broken under the preset tension.

[0013] As a further preferred embodiment of the present invention, In step S9, the criterion for determining whether the molded case assembly is completed is: the crimped outer conductor is pushed into the molded case and it can be sensed that the outer conductor is in contact with the inner wall of the molded case; In the step S10, the criterion for determining whether the secondary locks are assembled is: pressing all the secondary locks evenly until the secondary locks can be felt to be locked.

[0014] Compared with the prior art, the present invention can achieve the following technical effects: 1) The present invention provides a preparation method of a connector with a secondary lock, which comprises the following steps: axially stripping off the cut cable sheath, reversely sheathing the braided wire on the outer periphery of a shielding ring, and re-cutting the cable until the inner core wire is exposed. On the one hand, the braided wire material can be saved, and on the other hand, the braided wire sheathed on the outer periphery of the shielding ring can achieve a shielding effect on unexpected signals, thereby improving the transmission stability of expected signals. In addition, by reversely sheathing the braided wire between the outer periphery of the shielding ring and the inner wall of the outer conductor, the radial gap between the outer periphery of the shielding ring and the inner wall of the outer conductor can be filled, thereby ensuring the stable positioning of the internal shielding ring after crimping the outer conductor, and avoiding unexpected radial deformation effects that may be caused by the shielding ring during installation and use, thereby extending the service life.

[0015] 2) The present invention provides a method for preparing a connector, by determining a first preset spacing position from a fixed sheath in a braided wire area, and determining a second preset spacing position from a stripped sheath; at the same time, by subsequently detecting and confirming that the first preset spacing can meet the accommodation requirement for excess material on one side of the shielding ring, and detecting and confirming that the second preset spacing can meet the accommodation requirement for excess material on the other side of the shielding ring, thereby fully considering the impact of cutting excess material, and then reserving preset spacings on both sides of the shielding ring installation position, and detecting the reserved spacings, thereby further improving the accuracy and reliability of the shielding ring installation position, thereby effectively improving the overall quality of the connector and extending its service life.

[0016] 3) The present invention provides a preparation method of a connector with a secondary lock, by setting corresponding detection steps after the cable cutting, terminal crimping and outer conductor crimping steps respectively, so as to ensure that after each step, the cable cutting, terminal crimping and outer conductor crimping can meet the preset requirements of the detection, ensure the accuracy and effectiveness of the finished product of each step, avoid waste in subsequent steps, and effectively improve the manufacturing efficiency and the accuracy of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the connector provided by the present invention.

[0018] Figure 2 This is a structural diagram of the connector provided by the present invention.

[0019] Figure 3 A sectional side view of the connector provided by the present invention.

[0020] Figure 4 It is a structural schematic diagram of step S1 of the present invention.

[0021] Figure 5 It is a structural schematic diagram of step S2 of the present invention.

[0022] Figure 6 This is an enlarged structural view of the excess material position at the end of the shielding ring of the present invention.

[0023] Figure 7 It is a structural schematic diagram of step S3 of the present invention.

[0024] Figure 8 It is a structural schematic diagram of step S4 of the present invention.

[0025] Fig. 9 It is a structural schematic diagram of step S5 of the present invention.

[0026] Fig.10 It is a schematic diagram of a B-shaped cross-section of the terminal crimping portion of the present invention.

[0027] Fig.11This is a schematic diagram of the structure of step S7.1 of the present invention.

[0028] Fig.12 This is a schematic diagram of the structure of step S7.2 of the present invention.

[0029] Fig.13 It is a schematic diagram of the structure during steps S8.1-S8.2 of the present invention.

[0030] Fig.14 This is a schematic diagram of the structure of step S8.4 of the present invention.

[0031] Fig.15 It is a structural schematic diagram before step S9 of the present invention.

[0032] Fig.16 It is a schematic diagram of the structure after step S9 of the present invention.

[0033] Fig.17 It is a structural schematic diagram of step S10 of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] [First embodiment] like Figure 1-3 The figure shows a connector with a secondary lock provided by the present invention, which includes a cable 1, a terminal 2, a shielding ring 3, an outer conductor 4, a plastic shell 5 and a secondary lock 6. The front end of the cable 1 is connected to the terminal 2, and the outer periphery of the cable 1 is sleeved with a shielding ring 3. The cable 1, the terminal 2 and the shielding ring 3 are crimped to the inside of the outer conductor 4. The outer conductor 4 is inserted into the inside of the plastic shell 5. A secondary lock is inserted on the outer side of the plastic shell 5 to achieve axial positioning of the outer conductor 4 inside the plastic shell 5.

[0038] like Figure 4-5 and Figure 8 As shown, the cable 1 in this embodiment includes an outer sheath 11, a braided wire 12 and an aluminum foil 13 from the outside to the inside. An insulating part 14 is arranged inside the aluminum foil 13, and a core wire 15 is arranged inside the insulating part.

[0039] like Figure 4-17 A method for preparing a connector with a secondary lock provided by a first embodiment of the present invention is shown, comprising the following steps: S1: Select a preset length of sheath on the cable and cut it; Figure 4 As shown, the cable in this embodiment uses RG174 cable, and the preset length of the sheath 11A stripped after cutting is L1, and the axial length of the shielding ring 3 is L2, and L1>4L2 is satisfied. This is because the stripped braided wire needs to be reversely sheathed on the outer periphery of the shielding ring later, so an axial length greater than 2L2 needs to be reserved, and a preset spacing needs to be reserved on both sides of the shielding ring. Therefore, the preset length L1 of the stripped sheath 11A needs to be set to be greater than 4 times the axial length L2 of the shielding ring 3, that is, L1>4L2 is satisfied; S2: Peel off the cut cable sheath axially to expose the internal aluminum foil and braided wire, and crimp the shielding ring in the braided wire area; Figure 5-6 As shown, the following steps are included: S2.1: The cut cable sheath is axially peeled off and axially separated from the fixed sheath 11B by a preset distance L3, and L1>L3>L2 is satisfied, so as to expose the internal aluminum foil and braided wire; S2.2: Determine a position of a first preset distance J1 from the fixed sheath 11B in the braided wire area, and determine a position of a second preset distance J2 from the stripped sheath 11A; The purpose of setting the first preset spacing J1 is, on the one hand, to provide a space for the axially protruding part of the subsequent braided wire when it is reversely sheathed on the outer periphery of the shielding ring (to ensure that the shielding ring is completely covered by the braided wire); on the other hand, since the shielding ring will inevitably have excess material accumulation on both sides of the axial direction during the blanking or crimping process, the first preset spacing J1 can also provide an axial accommodation space for the excess material generated in this part; The purpose of setting the second preset spacing J2 is, on the one hand, because the outer diameter of the shielding ring is larger than the outer diameter of the braided wire, and the shielding ring has a certain thickness, so when the braided wire is reversely sheathed on the outer periphery of the shielding ring, the required axial length of the braided wire is bound to be larger than the axial length of the shielding ring, so reserving the second preset spacing J2 can provide braided wire raw materials for the subsequent reverse sheath of the braided wire. In addition, similarly, the second preset spacing J2 can also provide an axial accommodation space for the excess material generated in this part; S2.3: Crimping the shielding ring at the position determined in step S2.2; S3: Detect the crimping position of the shielding ring and cut off the cable; including the following steps: S3.1: Check and confirm that the first preset distance J1 between the shielding ring and the fixed sheath on one side meets the preset requirements; S3.2: Detect and confirm that the first preset spacing J1 can meet the accommodation requirement of the excess material on one side of the shielding ring; S3.3: Check and confirm that the second preset distance J2 between the shielding ring and the other side of the stripped sheath meets the preset requirements; S3.4: Detect and confirm that the second preset spacing J2 can meet the accommodation requirement of the remaining material on the other side of the shielding ring; S3.5: Remove the excess sheath Q outside the sheath together with the internal cable. Figure 7 As shown; Thus, the influence of the cutting residue is fully considered, and preset spacing is reserved on both sides of the shielding ring installation position, and the reserved spacing is detected, so as to further improve the accuracy and reliability of the shielding ring installation position, thereby effectively improving the overall quality of the connector and extending its service life; at the same time, the corresponding detection is carried out after the cable cutting step to ensure that the cutting step can meet the preset requirements of the detection, so as to ensure the accuracy and effectiveness of the finished product of this step, avoid waste in subsequent steps, and effectively improve the manufacturing efficiency and the accuracy of the finished product; S4: Peel off the cut cable sheath axially, put the braided wire on the outer circumference of the shielding ring in reverse direction, and cut the cable again until the inner core wire is exposed; Figure 8 As shown, the following steps are included: S4.1: Strip the cut cable jacket axially from the cable; S4.2: The braided wire 12 on the side of the shielding ring away from the fixed sheath is covered on the outer periphery of the shielding ring in the direction close to the fixed sheath; on the one hand, the braided wire material can be saved, and on the other hand, the braided wire covered on the outer periphery of the shielding ring can achieve a shielding effect on unexpected signals, thereby improving the transmission stability of expected signals; in addition, by reversely covering the braided wire between the outer periphery of the shielding ring and the inner wall of the outer conductor, the radial gap between the outer periphery of the shielding ring and the inner wall of the outer conductor can also be filled, ensuring the stable positioning of the internal shielding ring after the outer conductor is crimped, while avoiding unexpected radial deformation effects that may be caused by the shielding ring during installation and use, thereby extending the service life; S4.3: Preset the values ​​of the first and second axial lengths on the wire stripping machine; thereby accurately controlling the wire stripping length through the wire stripping machine to avoid defects such as unexpected errors that may be caused by manual wire stripping. The preset values ​​of the first and second axial lengths can be determined through empirical data, and can be corrected and optimized through a subsequent error comparison process after multiple uses, so as to further improve the wire stripping accuracy of the wire stripping machine; S4.4: Strip the cable using a wire stripping machine; S4.5: First, the aluminum foil 13 is cut off so that the first axial length of the exposed internal insulating portion 14 is L4, so that the insulating portion abuts against the terminal end during subsequent crimping of the terminal to achieve axial positioning of the terminal; and the following conditions are met: L2<L4; S4.6: Cut off the insulating part again, so that the second axial length of the inner core wire 15 exposed is L5, so as to facilitate the subsequent insertion into the terminal to realize the crimping process; and satisfy: L4-L5<L5, so as to ensure that the core wire 15 has a sufficient axial length to further improve the signal transmission stability after the terminal is crimped; S5: Crimp the terminal onto the outer periphery of the core wire; Fig. 9 As shown, the following steps are included: S5.1: Determine the axial distance D1 between the front end of the terminal and the rear end of the shielding ring to determine the axial position of the terminal crimping; S5.2: Determine the axial distance D2 between the front end of the terminal and the front end of the shielding ring, so as to determine the axial position of the terminal crimping and effectively detect the coaxiality of the terminal and the shielding ring before and after crimping; S5.3: Place the terminal crimping portion over the outer periphery of the core wire; S5.4: Crimp the terminal and crimp the terminal crimping portion into a B-shaped cross section, such as Fig.10 As shown; S6: Detect the crimping condition of the terminal; including the following steps: S6.1: Check and confirm that the end of the core wire extending from the terminal crimping portion 21 is visible but does not contact the end of the terminal sleeve portion 22; Fig. 9As shown, the core wire 15 extends out from the axial direction of the terminal crimping portion 21, but does not contact the end of the terminal sleeve portion 22, thereby further ensuring effective connection and stable signal transmission; S6.2: Check and confirm that the core wire does not extend radially from the terminal crimping portion, so as to confirm that the core wire 15 is entirely enclosed within the terminal crimping portion 21, thereby avoiding plugging problems and safety risks that may be caused by the core wire being exposed; S6.3: Detect and confirm that the axial deviation between the core wire and the terminal crimping portion does not exceed a preset value. In this embodiment, the preset value of the axial deviation is 0.6 mm, so as to ensure that the axial crimping position of the terminal is as accurate as possible; S6.4: Detect and confirm that the axial deviation between the terminal and the cable does not exceed a preset value. In this embodiment, the preset value of the axial deviation is 1.5°, so as to ensure that the terminal installation angle position is as accurate as possible; S6.5: Detect and confirm that the sum of the deflections of the terminal relative to the cable does not exceed a preset value. In this embodiment, the preset value of the sum of the deflections is 1.5°, so as to ensure that the terminal has a certain deflection as much as possible, so as to ensure that the signal transmission is stable and have sufficient service life and strength; S6.6: Check and confirm that the crimping cross-section shape of the terminal crimping portion is B-shaped, and that the length M1 and width M2 of the B-shaped cross-section meet the preset requirements; S7: inserting the cable with the crimped terminal into the outer conductor, and then crimping the outer conductor to the outer circumference of the cable; comprising the following steps: S7.1: Align and insert the crimped cable into the outer conductor. Fig.11 As shown; S7.2: Continue to feed the cable until the fixed sheath is located at the outer conductor crimping portion 41. Fig.12 As shown; S7.3: Check and confirm that the axial distance between the front end of the terminal and the front end of the outer conductor meets the preset requirements to avoid unexpected collision damage to the internal terminal and the inner end of the die-cast housing caused by the external plug connector or other objects; S7.4: Check and confirm that the concentricity between the terminal axis and the outer conductor axis meets the preset requirements, thereby improving the accuracy of plugging and facilitating one-time plugging; S7.5: Crimp the outer conductor to the outer circumference of the cable; S8: Detect the crimping condition of the outer conductor; including the following steps: S8.1: Check and confirm that the tolerances of the outer conductor crimping part K1, the sheath crimping part K2, the waist crimping part and the shielding ring crimping part K3 meet the preset requirements, so as to ensure that the crimping coaxiality of the outer conductor and its internal sheath, shielding ring and other positions meets the requirements as much as possible; S8.2: Detect and confirm that the axial deviation of the outer conductor crimping portion, the sheath and the shield ring after crimping meets the preset requirements, so as to ensure that the axial position of the inner sheath, shield ring and other positions relative to the outer conductor after crimping meets the requirements as much as possible; S8.3: Check and confirm that the front end of the outer conductor can rotate freely within the ring gauge to ensure that the arc of the front end of the outer conductor meets the requirements; S8.4: Perform a tension test on the crimped cable. Fix the cable fixing sheath on the rear side of the outer conductor in the fixture. Fix the connection position between the outer conductor sleeve portion 42 and the crimping portion of the outer conductor on the force-applying portion of the test device. Apply tension through the force-applying portion of the test device to test and confirm that the cable does not deform or break under the preset tension. Fig.14 As shown, in this embodiment, the preset pulling force is 70N, thereby ensuring that the connector has sufficient tensile strength and resistance.

[0040] S9: Push the crimped outer conductor into the plastic shell and repeat this process until the plastic shell is assembled. Figure 15-16 As shown, the judgment standard for the completion of the assembly of the molded shell in this embodiment is: the crimped outer conductor is pushed into the interior of the molded shell and the outer conductor can be felt to be in contact with the inner wall of the molded shell, so that the outer conductor can be confirmed to be assembled in the interior of the molded shell and assembled in place by simple physical touch, so as to improve the assembly convenience and assembly accuracy of the outer conductor and the molded shell; S10: Install the secondary locks on the outside of the plastic shell and press all the secondary locks evenly to ensure that the secondary locks and the plastic shell are assembled. Fig.17 As shown, the criterion for determining whether the secondary lock assembly is complete in this embodiment is: press all the secondary locks evenly until the secondary locks can be felt to be locked, so that the secondary locks can be confirmed to be assembled and in place inside the plastic shell by simple physical touch, thereby improving the assembly convenience and accuracy of the secondary locks and the plastic shell.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing a connector with a secondary lock, characterized in that: The following steps are involved: S1: Select a preset length of sheath on the cable and cut it; S2: Axially peel off the cut cable sheath to expose the internal aluminum foil and braided wire, and crimp the shielding ring in the braided wire area; S3: Check the crimping position of the shielding ring and cut off the cable; S4: Axially peel off the cut cable sheath, reversely cover the braided wire on the outer circumference of the shielding ring, and re-cut the cable until the inner core wire is exposed; S5: Crimp the terminal onto the outer periphery of the core wire; S6: Check the crimping condition of the terminal; S7: Insert the cable with the crimped terminal into the outer conductor, and then crimp the outer conductor onto the outer circumference of the cable; S8: Check the crimping condition of the outer conductor; S9: Push the crimped outer conductor into the plastic shell, and repeat this process until the plastic shell is assembled; S10: Install the secondary locks on the outside of the plastic shell and press all the secondary locks evenly to ensure that the secondary locks are assembled with the plastic shell.

2. The method for preparing a connector with a secondary lock according to claim 1, characterized in that: The cable is RG174 cable, the preset length of the sheath after cutting and stripping is L1, the axial length of the shielding ring is L2, and L1>4L2 is satisfied.

3. The method for preparing a connector with a secondary lock according to claim 2, characterized in that: The step S2 includes the following steps: S2.1: The cut cable sheath is axially peeled off and separated from the fixed sheath by a preset distance L3, and L1>L3>L2 is satisfied, so as to expose the internal aluminum foil and braided wire; S2.2: Determine a position of a first preset distance J1 from the fixed sheath in the braided wire area, and determine a position of a second preset distance J2 from the stripped sheath; S2.3: Crimp the shielding ring at the position determined in step S2.

2.

4. The method for preparing a connector with a secondary lock according to claim 3, characterized in that: The step S3 includes the following steps: S3.1: Check and confirm that the first preset distance J1 between the shielding ring and the fixed sheath on one side meets the preset requirements; S3.2: Detect and confirm that the first preset spacing J1 can meet the accommodation requirement of the excess material on one side of the shielding ring; S3.3: Check and confirm that the second preset distance J2 between the shielding ring and the other side of the stripped sheath meets the preset requirements; S3.4: Detect and confirm that the second preset spacing J2 can meet the accommodation requirement of the remaining material on the other side of the shielding ring; S3.5: Remove the excess sheath outside the sheath together with the internal cable.

5. The method for preparing a connector with a secondary lock according to claim 1, characterized in that: The step S4 includes the following steps: S4.1: Strip the cut cable jacket axially from the cable; S4.2: The braided wire on the side of the shielding ring away from the fixed sheath is placed on the outer periphery of the shielding ring in a direction close to the fixed sheath; S4.3: Preset the values ​​of the first and second axial lengths on the wire stripping machine; S4.4: Strip the cable using a wire stripping machine; S4.5: First, cut off the aluminum foil so that the first axial length of the internal insulation part exposed is L4; And satisfy: L2<L4; S4.6: Cut off the insulation part again, so that the second axial length of the inner core wire exposed is L5; And it satisfies: L4-L5<L5.

6. The method for preparing a connector with a secondary lock according to claim 5, characterized in that: The step S5 includes the following steps: S5.1: Determine the axial distance D1 between the front end of the terminal and the rear end of the shielding ring; S5.2: Determine the axial distance D2 between the front end of the terminal and the front end of the shielding ring; S5.3: Place the terminal crimping portion over the outer periphery of the core wire; S5.4: Crimp the terminal and crimp the terminal crimping portion into a B-shaped cross-section.

7. The method for preparing a connector with a secondary lock according to claim 6, characterized in that: The step S6 includes the following steps: S6.1: Check and verify that the end of the wire extending from the crimping portion of the terminal is visible but does not contact the end of the sleeve portion of the terminal; S6.2: Check and confirm that the core wire does not extend radially from the crimping portion of the terminal; S6.3: Check and confirm that the axial deviation between the core wire and the terminal crimping part does not exceed the preset value; S6.4: Check and confirm that the axial deviation between the terminal and the cable does not exceed the preset value; S6.5: Check and verify that the sum of the deflections of the terminals relative to the cable does not exceed a preset value; S6.6: Check and confirm that the crimping cross-section shape of the terminal crimping portion is B-shaped, and that the length and width of the B-shaped cross-section meet the preset requirements.

8. The method for preparing a connector with a secondary lock according to claim 1, characterized in that: The step S7 includes the following steps: S7.1: Align and insert the crimped cable into the outer conductor; S7.2: Continue to feed the cable until the fixed sheath is located at the crimped portion of the outer conductor; S7.3: Check and confirm that the axial distance between the front end of the terminal and the front end of the outer conductor meets the preset requirements; S7.4: Check and confirm that the concentricity between the terminal axis and the outer conductor axis meets the preset requirements; S7.5: Crimp the outer conductor to the outer circumference of the cable.

9. The method for preparing a connector with a secondary lock according to claim 8, characterized in that: The step S8 includes the following steps: S8.1: Check and confirm that the tolerances of the outer conductor crimping part, the sheath crimping part, the waist crimping part and the shield ring crimping part meet the preset requirements respectively; S8.2: Detect and confirm that the axial deviation of the outer conductor crimping part, the sheath and the shielding ring after crimping meets the preset requirements; S8.3: Check and confirm that the front end of the outer conductor can rotate freely within the ring gauge; S8.4: Perform a tensile test on the cable after crimping. Fix the cable fixing sheath on the rear side of the outer conductor in the fixture, fix the connection position between the outer conductor sleeve and the outer conductor crimping part on the force-applying part of the test device, and apply tension through the force-applying part of the test device to test and confirm that the cable will not be deformed or broken under the preset tension.

10. The method for preparing a connector with a secondary lock according to claim 1, characterized in that: In step S9, the criterion for determining whether the molded case assembly is completed is: the crimped outer conductor is pushed into the molded case and it can be sensed that the outer conductor is in contact with the inner wall of the molded case; In the step S10, the criterion for determining whether the secondary locks are assembled is: pressing all the secondary locks evenly until the secondary locks can be felt to be locked.

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