Pressure monitoring electrical connector contact automatic crimping device

Abstract

The present invention provides a pressure-monitoring automatic crimping device for electrical connector contacts, comprising: a four-way centering crimping die, a four-way centering clamping mechanism, a telescopic mechanism, a stepper motor and a servo drive device; the telescopic mechanism is connected to and drives the four-way centering crimping die to move axially under the drive of the stepper motor; a plurality of dies are arranged on the circumference of the four-way centering crimping die, and the four-way centering clamping mechanism is connected to and drives the plurality of dies to move back and forth toward the axial direction of the four-way centering crimping die under the drive of the servo drive device. The present application adopts a precision ball screw to accurately control the crimping stroke, and is provided with a pressure monitoring device to monitor the pressure of the crimping process in real time, and at the same time adopts a PLC controller to control the crimping process, thereby solving the problems of unstable manual crimping force, unmonitorable crimping process, inaccurate crimping positioning, and failure to maintain good coaxiality after crimping, and ensures the consistency and stability of the crimping quality of high-precision electrical connector contacts.

Description

Technical Field

[0001] The invention relates to the field of crimping devices, in particular to an automatic crimping device for contact pieces of a pressure-monitoring electrical connector. Background Art

[0002] With the rapid development of aerospace technology, the requirements for the quality of aerospace products are getting higher and higher, especially electrical connector products, which are developing in the direction of miniaturization and lightweight. The dimensions of related contacts are becoming more and more precise, so the sensitivity to crimping tools is getting higher and higher. Traditional manual crimping has inaccurate positioning, unstable force, and low crimping efficiency, which can no longer meet the requirements of modern production.

[0003] As spacecraft systems become more and more complex, more and more corresponding communication connectors are used. Communication connectors are usually three-coaxial structures, that is, a ring-shaped contact in the center, a ring-shaped contact in the middle, and a ring-shaped contact on the outer layer. Therefore, good coaxiality must be maintained during the assembly process, otherwise it is easy to cause docking damage; the automatic crimping equipment on the market is currently developed for ordinary electrical connector contacts. There is no relevant automatic crimping equipment for crimping special structure contacts such as coaxial connectors.

[0004] In addition, the pressure control of the automatic crimping equipment on the market is still insufficient during the crimping process, and the crimping accuracy is insufficient. For the crimping of precision contacts, the crimping is often not in place, resulting in insufficient tension, or the crimping is too tight, resulting in cable breakage, thereby reducing mechanical properties; product consistency is difficult to ensure. Especially for the crimping of precision electrical connector contacts, slight fluctuations in pressure may lead to crimping failure or poor contact, affecting product quality and production efficiency. Therefore, there is an urgent need for an automatic crimping device that can monitor and accurately control the crimping force in real time.

[0005] In order to improve the crimping quality of coaxial connector contacts, ensure that the force applied during the crimping process is accurate and stable, the crimping process can be monitored, the crimping positioning is accurate, and good coaxiality is maintained after crimping, it is necessary to design a high-precision pressure monitoring electrical connector contact automatic crimping device. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide an automatic crimping device for contact pieces of a pressure-monitoring electrical connector.

[0007] According to the present invention, a pressure monitoring electrical connector contact automatic crimping device includes: a four-way centering crimping die, a four-way centering clamping mechanism, a telescopic mechanism, a stepping motor and a servo drive device;

[0008] The telescopic mechanism is connected to and drives the contact of the electrical connector to move along the axial direction of the four-way centering crimping die under the drive of the stepping motor;

[0009] A plurality of pressing dies are arranged around the four-way centering crimping die, and the four-way centering clamping mechanism is connected and driven by a servo drive device to drive the plurality of pressing dies to move back and forth toward the axial direction of the four-way centering crimping die.

[0010] Preferably, the four-way centering crimping die comprises: a housing assembly and a crimping assembly;

[0011] The crimping assembly comprises: a first pressing die, a second pressing die, a third pressing die, a fourth pressing die, a first spring assembly, a second spring assembly, a third spring assembly and a fourth spring assembly;

[0012] The first die, the second die, the third die and the fourth die are respectively slidably mounted at the four equal parts of the circumference of the shell component, and the first die, the second die, the third die and the fourth die are allowed to slide back and forth from the circumference toward the axis of the shell component;

[0013] A first spring assembly is arranged between the first die and the housing assembly and is reset through the first spring assembly, a second spring assembly is arranged between the second die and the housing assembly and is reset through the second spring assembly, a third spring assembly is arranged between the third die and the housing assembly and is reset through the third spring assembly, and a fourth spring assembly is arranged between the fourth die and the housing assembly and is reset through the fourth spring assembly.

[0014] Preferably, the four-way centering and clamping mechanism comprises: a first sliding assembly, a first linear guide assembly, a second sliding assembly, a second linear guide assembly, a third sliding assembly, a third linear guide assembly, a fourth sliding assembly and a fourth linear guide assembly;

[0015] The first sliding assembly is slidably mounted on the first linear guide assembly, the second sliding assembly is slidably mounted on the second linear guide assembly, the third sliding assembly is slidably mounted on the third linear guide assembly, and the fourth sliding assembly is slidably mounted on the fourth linear guide assembly;

[0016] The first sliding component, the second sliding component, the third sliding component and the fourth sliding component are distributed on the peripheral side of the four-way centering crimping mold and are allowed to move back and forth toward the axial direction of the four-way centering crimping mold. The first sliding component acts on the first die, the second sliding component acts on the second die, the third sliding component acts on the third die, and the fourth sliding component acts on the fourth die.

[0017] Preferably, the first sliding assembly and the third sliding assembly are symmetrically distributed on both sides of the four-way centering crimping die, the first sliding assembly and the third sliding assembly are connected together and driven by a second precision ball screw, the first sliding assembly cooperates with the positive thread area of ​​the second precision ball screw, and the third sliding assembly cooperates with the negative thread area of ​​the second precision ball screw;

[0018] The second sliding assembly and the fourth sliding assembly are symmetrically distributed on both sides of the four-way centering crimping mold, the second sliding assembly and the fourth sliding assembly are connected together and driven by the third precision ball screw, the second sliding assembly cooperates with the positive thread area of ​​the third precision ball screw, and the fourth sliding assembly cooperates with the negative thread area of ​​the third precision ball screw.

[0019] Preferably, the servo drive device comprises: a first servo motor and a second servo motor;

[0020] The first servo motor shaft of the first servo motor is connected to the second precision ball screw;

[0021] The second servo motor shaft of the second servo motor is connected to the third precision ball screw;

[0022] The second precision ball screw is perpendicular to the third precision ball screw, so as to realize the four-way centering movement of the first sliding assembly, the second sliding assembly, the third sliding assembly and the fourth sliding assembly relative to the axial center position of the four-way centering crimping die.

[0023] Preferably, the telescopic mechanism comprises: a fifth sliding assembly, a fifth linear guide assembly, a connecting rod and a telescopic limit rod;

[0024] The fifth sliding component is slidably installed on the fifth linear guide rail component, and the fifth sliding component moves along the axial direction of the four-way centering crimping mold. The fifth sliding component is connected to the telescopic limit rod through a connecting rod toward one side of the four-way centering crimping mold, and the telescopic limit rod at the top of the fifth sliding component drives the contact piece to move along the central axis of the shell assembly.

[0025] Preferably, the stepper motor is connected to a first precision ball screw, which drives the fifth sliding assembly to move relative to the fifth linear guide assembly, and the first precision ball screw is perpendicular to the second precision ball screw and the third precision ball screw.

[0026] Preferably, a pressure monitoring device is installed on the four-way centering and pressing mechanism, and the pressure monitoring device includes: a first pressure monitoring device and a second pressure monitoring device;

[0027] The first pressure monitoring device includes: a first pressure sensor and a first pressure controller;

[0028] The first pressure sensor is mounted on the third sliding assembly, and the first pressure controller is electrically connected to the first pressure sensor;

[0029] The second pressure monitoring device includes: a second pressure sensor and a second pressure controller;

[0030] The second pressure sensor is mounted on the fourth sliding assembly, and the second pressure controller is electrically connected to the second pressure sensor.

[0031] Preferably, the four-way centering crimping die, the four-way centering pressing mechanism and the telescopic mechanism are installed on a chassis, and a control panel, a PLC controller and an alarm device are provided on the chassis;

[0032] The PLC controller is electrically connected to the stepper motor and the driver of the servo drive device, and the PLC controller is electrically connected to the first pressure controller and the second pressure controller.

[0033] Preferably, the first sliding assembly, the second sliding assembly, the third sliding assembly and the fourth sliding assembly are all equipped with a fine-tuning device, and the fine-tuning device uses a ruler for fine-tuning.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This application uses a precision ball screw to accurately control the crimping stroke, and is equipped with a pressure monitoring device to monitor the pressure of the crimping process in real time. At the same time, a PLC controller is used to control the crimping process, which solves the problems of unstable manual crimping force, unmonitorable crimping process, inaccurate crimping positioning, and inability to maintain good coaxiality after crimping, thereby ensuring the consistency and stability of the crimping quality of high-precision electrical connector contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 It is a schematic diagram of the overall structure of the automatic crimping device;

[0038] Figure 2 It is a schematic diagram of the telescopic mechanism structure;

[0039] Figure 3 It is a structural schematic diagram of a single-group four-way centering and clamping mechanism;

[0040] Figure 4 It is a schematic diagram of the connection between the four-way centering and clamping mechanism and the servo drive device;

[0041] Figure 5 This is a schematic diagram of the structure of a four-way centering crimping die;

[0042] As shown in the figure:

[0043]

[0044] DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0046] Example 1

[0047] like Figure 1 As shown, this embodiment includes: a four-way centering crimping die 1, a four-way centering clamping mechanism 2, a pressure monitoring device 3, a control panel 4, a telescopic mechanism 5, a ball screw assembly, a stepper motor 7 and a servo drive device 8.

[0048] The telescopic mechanism 5 is connected and driven by the stepper motor 7 to drive the contact of the electrical connector to move along the axial direction of the four-way centering crimping die 1; multiple dies are arranged around the four-way centering crimping die 1, and the four-way centering clamping mechanism 2 is connected and driven by the servo drive device 8 to drive multiple dies to move back and forth toward the axial direction of the four-way centering crimping die 1. The four-way centering crimping die 1, the four-way centering clamping mechanism 2 and the telescopic mechanism 5 are installed on the chassis, and the chassis is provided with a control panel 4, a PLC controller and an alarm device; the PLC controller is electrically connected to the driver of the stepper motor 7 and the servo drive device 8, and the PLC controller is electrically connected to the first pressure controller and the second pressure controller. The PLC controller is a PLC control device that can be implemented in this field.

[0049] The four-way vertical centering in this embodiment means that the four-way centering crimping die 1 is arranged in four directions in a cross direction with the axis of the four-way centering crimping die 1 as the center, and moves back and forth toward the center direction.

[0050] like Figure 2As shown, the telescopic mechanism 5 includes: a fifth sliding assembly 51, a fifth linear guide assembly 52, a connecting rod 53 and a telescopic limit rod 54; the fifth sliding assembly 51 is connected to the telescopic limit rod 54 through the connecting rod 53 to form a whole, the fifth sliding assembly 51 is slidably installed on the fifth linear guide assembly 52, the fifth sliding assembly 51 moves along the axis direction of the four-way centering crimping die 1, and the telescopic limit rod 54 at the top of the fifth sliding assembly 51 drives the contact piece to move along the central axis of the housing assembly 11. The stepper motor 7 is connected to the first precision ball screw 61, the first precision ball screw 61 drives the fifth sliding assembly 51 to move relative to the fifth linear guide assembly 52, and the first precision ball screw 61 is perpendicular to the second precision ball screw 62 and the third precision ball screw 63.

[0051] like Figure 3-4As shown, the four-way centering clamping mechanism 2 includes: a first sliding component 21, a first linear guide component 22, a second sliding component 23, a second linear guide component 24, a third sliding component 25, a third linear guide component 26, a fourth sliding component 27 and a fourth linear guide component 28; the first sliding component 21 is slidably mounted on the first linear guide component 22, the second sliding component 23 is slidably mounted on the second linear guide component 24, the third sliding component 25 is slidably mounted on the third linear guide component 26, and the fourth sliding component 27 is slidably mounted on the fourth linear guide component 28; the first sliding component 21, the second sliding component 23, the third sliding component 25 and the fourth sliding component 27 are distributed on the peripheral side of the four-way centering crimping die 1 and are allowed to move back and forth in the axial direction of the four-way centering crimping die 1, the first sliding component 21 acts on the first die 121, the second sliding component 23 acts on the second die 122, the third sliding component 25 acts on the third die 123, and the fourth sliding component 27 acts on the fourth die 124. The first sliding component 21 and the third sliding component 25 are symmetrically distributed on both sides of the four-way centering crimping mold 1, the first sliding component 21 and the third sliding component 25 are connected together and driven by the second precision ball screw 62, the first sliding component 21 cooperates with the positive thread area of ​​the second precision ball screw 62, and the third sliding component 25 cooperates with the negative thread area of ​​the second precision ball screw 62; the second sliding component 23 and the fourth sliding component 27 are symmetrically distributed on both sides of the four-way centering crimping mold 1, the second sliding component 23 and the fourth sliding component 27 are connected together and driven by the third precision ball screw 63, the second sliding component 23 cooperates with the positive thread area of ​​the third precision ball screw 63, and the fourth sliding component 27 cooperates with the negative thread area of ​​the third precision ball screw 63. A pressure monitoring device 3 is installed on the four-way centering clamping mechanism 2, and the pressure monitoring device 3 includes: a first pressure monitoring device and a second pressure monitoring device; the first pressure monitoring device includes: a first pressure sensor 31 and a first pressure controller; the first pressure sensor 31 is installed on the third sliding assembly 25, and the first pressure controller is electrically connected to the first pressure sensor 31; the second pressure monitoring device includes: a second pressure sensor 32 and a second pressure controller; the second pressure sensor 32 is installed on the fourth sliding assembly 27, and the second pressure controller is electrically connected to the second pressure sensor 32.

[0052] The servo drive device 8 includes: a first servo motor 81 and a second servo motor 82; the first servo motor shaft 811 of the first servo motor 81 is connected to the second precision ball screw 62; the second servo motor shaft 821 of the second servo motor 82 is connected to the third precision ball screw 63; the second precision ball screw 62 is perpendicular to the third precision ball screw 63, so as to realize the four-way centering movement of the first sliding component 21, the second sliding component 23, the third sliding component 25 and the fourth sliding component 27 relative to the axial position of the four-way centering crimping mold 1.

[0053] In one embodiment, the accuracy grade of the first precision ball screw 61 , the second precision ball screw 62 , and the third precision ball screw 63 is C0 to C5 (0.003 mm to 0.018 mm).

[0054] In one embodiment, a fine-tuning device 211 is installed on the first sliding component 21, the second sliding component 23, the third sliding component 25 and the fourth sliding component 27. The fine-tuning device 211 uses a ruler to connect the pressure head 212. By rotating the ruler, the position of the pressure head 212 in the corresponding sliding component can be adjusted.

[0055] like Figure 5 As shown, the four-way centering crimping die 1 includes: a housing component 11 and a crimping component 12; the crimping component 12 includes: a first die 121, a second die 122, a third die 123, a fourth die 124, a first spring component 131, a second spring component 132, a third spring component 133 and a fourth spring component 134; the first die 121, the second die 122, the third die 123 and the fourth die 124 are slidably mounted at the four equal parts of the circumference of the housing component 11, respectively, and the first die 121, the second die 122, the third die 123 and the fourth die 124 allow The circumferential side slides back and forth toward the axial position of the shell component 11; a first spring component 131 is arranged between the first die 121 and the shell component 11, and the first spring component 131 is used to achieve reset; a second spring component 132 is arranged between the second die 122 and the shell component 11, and the second spring component 132 is used to achieve reset; a third spring component 133 is arranged between the third die 123 and the shell component 11, and the third spring component 133 is used to achieve reset; a fourth spring component 134 is arranged between the fourth die 124 and the shell component 11, and the fourth spring component 134 is used to achieve reset.

[0056] In this embodiment, a cavity for placing an electrical connector contact is provided at the axial position of the shell assembly 11, and the telescopic mechanism 5 can drive the electrical connector contact to move axially; after the electrical connector contact moves to a suitable position, the four-way centering clamping mechanism 2 can drive the four-way centering die to crimp toward the peripheral side of the electrical connector contact.

[0057] Example 2

[0058] Example 2 is a preferred example of Example 1.

[0059] like Figure 1 As shown:

[0060] The four-way centering crimping die 1 is used to accurately locate and extrude the crimping position of the contact piece of the electrical connector to form a four-way centering pressure pit.

[0061] The four-way centering clamping mechanism 2 moves toward the four-way centering crimping die 1 during crimping to clamp the four-way centering crimping die 1; the four-way centering clamping mechanism 2 includes: a first sliding assembly 21, a first linear guide assembly 22, a second sliding assembly 23, a second linear guide assembly 24, a third sliding assembly 25, a third linear guide assembly 26, a fourth sliding assembly 27 and a fourth linear guide assembly 28, wherein:

[0062] The first sliding assembly 21, the second sliding assembly 23, the third sliding assembly 25 and the fourth sliding assembly 27 all include a fine-tuning device 211 for accurately adjusting the position of the first sliding assembly 21, the second sliding assembly 23, the third sliding assembly 25 or the fourth sliding assembly 27. The fine-tuning device 211 uses a ruler for fine-tuning, and the ruler adjustment accuracy is 0.01mm.

[0063] Taking the first sliding assembly 21 as an example, the first sliding assembly 21 moves along the first linear guide assembly 22 during the crimping process to press the first pressing die 121 of the four-way centering crimping die 1 to complete the crimping.

[0064] The pressure monitoring device 3 is used to monitor the pressure changes during the crimping process in real time; the pressure monitoring device 3 includes a first pressure monitoring device and a second pressure monitoring device, the first pressure monitoring device includes a first pressure sensor 31 and a first pressure controller, wherein the first pressure sensor 31 is connected to the top of the third sliding component 25 to receive the pressure value generated by the third sliding component 25 on the four-way centering crimping mold 1; the first pressure controller is electrically connected to the first pressure sensor 31 to record and analyze the pressure value during the crimping process, and when the pressure value exceeds the range, the crimping process is stopped; the second pressure monitoring device includes a second pressure sensor 32 and a second pressure controller, wherein the second pressure sensor 32 is connected to the top of the fourth sliding component 27 to receive the pressure value generated by the fourth sliding component 27 on the four-way centering crimping mold 1; the second pressure controller is electrically connected to the second pressure sensor 32 to record and analyze the pressure value during the crimping process, and when the pressure value exceeds the range, the crimping process is stopped.

[0065] The control panel 4 is used to set the crimping parameters, display the current crimping parameters, display the curve of the relationship between displacement and pressure during the crimping process, and view the historical crimping parameters and data.

[0066] The alarm device is used to sound an alarm when the crimping force value exceeds the set range, when the servo motor shaft and the stepper motor shaft have not returned to the zero position, when foreign matter enters the crimping area during the crimping process, and when the safety door is not closed.

[0067] The PLC controller is electrically connected to the first pressure controller and the second pressure controller, the drivers of the stepper motor 7 and the servo drive device 8, the control panel 4, and the alarm device, and is used to control the servo drive device 8 and the stepper motor 7 to perform actions according to the program, and at the same time monitor and control the operating status of the servo drive device 8, the stepper motor 7, the pressure monitoring device 3, and the alarm device in real time. When a fault occurs, it can quickly diagnose and feedback the fault information, and stop the automatic crimping device. The PLC controller is also used to record various data in the crimping process, including the crimping program, pressure value, crimping position, and crimping speed.

[0068] like Figure 2 As shown:

[0069] The telescopic mechanism 5 moves the position of the electrical connector contact in the horizontal direction after the crimping starts, so as to accurately align the crimping position of the electrical connector contact with the four-way centering crimping die 1. After the crimping is completed, the electrical connector contact is moved out of the crimping position; the telescopic mechanism 5 includes a fifth sliding assembly 51 and a fifth linear guide assembly 52, wherein:

[0070] The top end of the fifth sliding assembly 51 is precisely aligned with the midpoint of the four-way centering crimping die 1 , so as to enable the contact piece of the electrical connector to move precisely on the central axis of the four-way centering crimping die 1 .

[0071] The first precision ball screw 61 is threadedly connected to the fifth sliding assembly 51 to push the fifth sliding assembly 51 to move on the fifth linear guide rail assembly 52 .

[0072] like Figure 3 As shown, the stepper motor 7 is connected to one end of the first precision ball screw 61 to provide precise power control for the first precision ball screw 61; the stepper motor 7 is also equipped with a stepper driver, and the stepper motor shaft of the stepper motor 7 is connected to the first precision ball screw 61. The servo drive device 8 is used to provide precise power control for the second precision ball screw 62 and the third precision ball screw 63; the servo drive device 8 includes a first servo motor 81 and a first servo driver, a second servo motor 82 and a second servo driver. One end of the first precision ball screw 61 is connected to the stepper motor 7, and the other end is connected to the fifth sliding assembly 51 of the telescopic mechanism 5, so as to transmit the power of the stepper motor 7 to the fifth sliding assembly 51; the second precision ball screw 62 and the third precision ball screw 63 are bidirectional screws with positive and negative teeth, and one end of the second precision ball screw 62 is connected to the first servo motor shaft 811 of the first servo motor 81.

[0073] like Figure 4As shown, the four-way centering and clamping mechanism 2 includes: a first sliding component 21, a second sliding component 23, a third sliding component 25, a fourth sliding component 27, a first linear guide component 22, a second linear guide component 24, a third linear guide component 26, and a fourth linear guide component 28. The first sliding component 21 is connected to the first linear guide component 22, the second sliding component 23 is connected to the second linear guide component 24, the third sliding component 25 is connected to the third linear guide component 26, and the fourth sliding component 27 is connected to the fourth linear guide component 28; the first linear guide component 22, the second linear guide component 24, the third linear guide component 26, and the fourth linear guide component 28 are installed in four-way vertical centering to move the first sliding component 21, the second sliding component 23, the third sliding component 25, and the fourth sliding component 27 toward the center point. The second precision ball screw 62 is connected to the first sliding component 21 of the four-way centering and clamping mechanism 2 by positive thread, and is connected to the third sliding component 25 of the four-way centering and clamping mechanism 2 by negative thread, so that the first servo motor 81 drives the two sliding components to move in relative and opposite directions; one end of the third precision ball screw 63 is connected to the second servo motor shaft 821, and the third precision ball screw 63 is connected to the second sliding component 24 of the four-way centering and clamping mechanism 2 by positive thread, and is connected to the fourth sliding component 28 of the four-way centering and clamping mechanism 2 by negative thread, so that the second servo motor 82 drives the two sliding components to move in relative and opposite directions.

[0074] In one embodiment, the second precision ball screw 62 and the third precision ball screw 63 are installed perpendicular to each other to enable the four sliding components in the four-way centering clamping mechanism 2 to move in four directions; the first precision ball screw 61 is perpendicular to the second precision ball screw 62 and the third precision ball screw 63 to enable the fifth sliding component 51 in the telescopic mechanism 5 to move on the central axis of the four-way centering crimping mold 1.

[0075] The PLC controller is electrically connected to the first servo driver and the second servo driver, and is used for synchronously controlling the first servo driver and the second servo driver.

[0076] like Figure 5As shown, the four-way centering crimping die 1 includes a shell component 11 and a crimping component 12, wherein the shell component 11 is connected to the top of the linear guide rail component 52 in the telescopic mechanism 5 to determine the crimping area; the crimping component 12 includes a first die 121, a second die 122, a third die 123, a fourth die 124, a first spring component 131, a second spring component 132, a third spring component 133, and a fourth spring component 134, the first die 121 is connected to the first spring component 131, the second die 122 is connected to the second spring component 132, the third die 123 is connected to the third spring component 133, and the fourth die 124 is connected to the fourth spring component 134, so that after the crimping is completed, the spring component is used to retract and reset the die.

[0077] The center position of the four-way centering crimping mold 1 is provided with a first limiting step and a second limiting step along the axial front and rear ends. The first limiting step is used to position the top end of the contact piece, and the second limiting step is used to position the rear end of the contact piece. The first limiting step and the second limiting step are positioned together to maintain good coaxiality during the crimping process of the contact piece.

[0078] Working principle in this embodiment:

[0079] After the power is turned on, the PLC controller checks whether the safety door is closed. If it is not closed, the alarm device sounds an alarm and prompts that the safety door is not closed; the PLC controller checks whether the first servo motor shaft 811, the second servo motor shaft 821, and the stepper motor shaft have returned to zero position. If not, the alarm device sounds an alarm and prompts that the shaft has not been reset; reset each motor shaft through the control panel 4 command; place the contact to be crimped in the four-way centering crimping mold 1, select the crimping program through the control panel 4, click the control panel 4 to start the crimping command, and start the crimping; the stepper motor 7 drives the telescopic mechanism 5 to move, and moves the contact to be crimped back to the crimping position of the four-way centering crimping mold 1, the stepper motor 7 stops moving, and the first servo motor 81 and the second servo motor 82 simultaneously drive the sliding assembly in the four-way centering clamping mechanism 2 to move toward the center point, and the sliding assembly squeezes the four of the four-way centering crimping mold 1 The four dies simultaneously squeeze the contact piece to be crimped to form a crimping pit; the PLC controller monitors the crimping stroke and the crimping force to meet the program settings, stops crimping, and the first servo motor 81 and the second servo motor 82 simultaneously drive the sliding component in the four-way centering clamping mechanism 2 to retreat, and the four dies of the four-way centering crimping mold 1 retreat under the action of the spring component. When the retreat displacement of the sliding component in the four-way centering clamping mechanism 2 meets the program settings, the first servo motor 81 and the second servo motor 82 stop moving at the same time; the stepper motor 7 drives the telescopic mechanism 5 to move, moves the crimped contact piece forward, and sends it out of the crimping position. The stepper motor 7 stops moving, takes out the crimped contact piece, and the crimping is completed; during the crimping process, the PLC controller monitors the crimping force and crimping displacement in real time. When the crimping force and crimping displacement exceed the program setting range, the alarm device sounds an alarm and stops moving immediately, and the control panel 4 prompts the fault type.

[0080] In summary, in order to solve the problems of unstable manual crimping force, unmonitorable crimping process, inaccurate crimping positioning, and failure to maintain good coaxiality after crimping of coaxial connector contacts, this embodiment designs a pressure-monitoring automatic crimping device for electrical connector contacts. The device matches the four-way centering crimping mold 1 with the contact size of the coaxial connector, adopts a tight ball screw to accurately control the crimping stroke, and is provided with a pressure monitoring device 3 to monitor the pressure of the crimping process in real time. The crimping position and pressure curve are displayed in real time through the control panel 4, and a PLC controller is used to analyze and control the crimping process, which solves the problems of unstable manual crimping force, unmonitorable crimping process, inaccurate crimping positioning, and failure to maintain good coaxiality after crimping, thereby ensuring the consistency and stability of the crimping quality of high-precision electrical connector contacts.

[0081] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A pressure monitoring electrical connector contact automatic crimping device, characterized in that: include: A four-way centering crimping die (1), a four-way centering pressing mechanism (2), a telescopic mechanism (5), a stepping motor (7), and a servo drive device (8); The telescopic mechanism (5) is connected and drives the contact piece of the electrical connector to move along the axial direction of the four-way centering crimping die (1) under the drive of the stepping motor (7); A plurality of pressing dies are arranged on the peripheral side of the four-way centering crimping die (1), and the four-way centering clamping mechanism (2) is connected and driven by a servo drive device (8) to drive the plurality of pressing dies to move back and forth in the axial direction of the four-way centering crimping die (1).

2. The automatic crimping device for contact of a pressure monitoring electrical connector according to claim 1, characterized in that: The four-way centering crimping die (1) comprises: a housing component (11) and a crimping component (12); The crimping assembly (12) comprises: a first pressing die (121), a second pressing die (122), a third pressing die (123), a fourth pressing die (124), a first spring assembly (131), a second spring assembly (132), a third spring assembly (133) and a fourth spring assembly (134); The first die (121), the second die (122), the third die (123) and the fourth die (124) are respectively slidably mounted at the four equal parts of the circumference of the shell component (11); the first die (121), the second die (122), the third die (123) and the fourth die (124) are allowed to slide back and forth from the circumference toward the axis of the shell component (11); A first spring assembly (131) is arranged between the first die (121) and the housing assembly (11), and resetting is achieved through the first spring assembly (131); a second spring assembly (132) is arranged between the second die (122) and the housing assembly (11), and resetting is achieved through the second spring assembly (132); a third spring assembly (133) is arranged between the third die (123) and the housing assembly (11), and resetting is achieved through the third spring assembly (133); a fourth spring assembly (134) is arranged between the fourth die (124) and the housing assembly (11), and resetting is achieved through the fourth spring assembly (134).

3. The automatic crimping device for contact of a pressure monitoring electrical connector according to claim 2, characterized in that: The four-way centering and clamping mechanism (2) comprises: a first sliding assembly (21), a first linear guide assembly (22), a second sliding assembly (23), a second linear guide assembly (24), a third sliding assembly (25), a third linear guide assembly (26), a fourth sliding assembly (27) and a fourth linear guide assembly (28); The first sliding assembly (21) is slidably mounted on the first linear guide assembly (22), the second sliding assembly (23) is slidably mounted on the second linear guide assembly (24), the third sliding assembly (25) is slidably mounted on the third linear guide assembly (26), and the fourth sliding assembly (27) is slidably mounted on the fourth linear guide assembly (28); The first sliding component (21), the second sliding component (23), the third sliding component (25) and the fourth sliding component (27) are distributed on the peripheral side of the four-way centering crimping mold (1) and are allowed to move back and forth toward the axial direction of the four-way centering crimping mold (1); the first sliding component (21) acts on the first die (121), the second sliding component (23) acts on the second die (122), the third sliding component (25) acts on the third die (123), and the fourth sliding component (27) acts on the fourth die (124).

4. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 3, characterized in that: The first sliding component (21) and the third sliding component (25) are symmetrically distributed on both sides of the four-way centering crimping die (1); the first sliding component (21) and the third sliding component (25) are connected together and driven by a second precision ball screw (62); the first sliding component (21) cooperates with the positive thread area of ​​the second precision ball screw (62); and the third sliding component (25) cooperates with the negative thread area of ​​the second precision ball screw (62); The second sliding component (23) and the fourth sliding component (27) are symmetrically distributed on both sides of the four-way centering crimping mold (1); the second sliding component (23) and the fourth sliding component (27) are connected together and driven by a third precision ball screw (63); the second sliding component (23) cooperates with the positive thread area of ​​the third precision ball screw (63); and the fourth sliding component (27) cooperates with the negative thread area of ​​the third precision ball screw (63).

5. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 4, characterized in that: The servo drive device (8) comprises: a first servo motor (81) and a second servo motor (82); The first servo motor shaft (811) of the first servo motor (81) is connected to the second precision ball screw (62); The second servo motor shaft (821) of the second servo motor (82) is connected to the third precision ball screw (63); The second precision ball screw (62) is perpendicular to the third precision ball screw (63), so as to realize the four-way centering movement of the first sliding component (21), the second sliding component (23), the third sliding component (25) and the fourth sliding component (27) relative to the axial position of the four-way centering crimping die (1).

6. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 4, characterized in that: The telescopic mechanism (5) comprises: a fifth sliding assembly (51), a fifth linear guide assembly (52), a connecting rod (53) and a telescopic limiting rod (54); The fifth sliding component (51) is slidably mounted on the fifth linear guide rail component (52), and the fifth sliding component (51) moves along the axial direction of the four-way centering crimping mold (1). The fifth sliding component (51) is connected to a telescopic limit rod (54) through a connecting rod (53) toward one side of the four-way centering crimping mold (1), and the telescopic limit rod (54) at the top end of the fifth sliding component (51) drives the contact piece to move along the central axis of the housing component (11).

7. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 6, characterized in that: The stepper motor (7) is connected to a first precision ball screw (61), the first precision ball screw (61) drives the fifth sliding assembly (51) to move relative to the fifth linear guide assembly (52), and the first precision ball screw (61) is perpendicular to the second precision ball screw (62) and the third precision ball screw (63).

8. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 3, characterized in that: A pressure monitoring device (3) is installed on the four-way centering and pressing mechanism (2), and the pressure monitoring device (3) comprises: a first pressure monitoring device and a second pressure monitoring device; The first pressure monitoring device comprises: a first pressure sensor (31) and a first pressure controller; The first pressure sensor (31) is mounted on the third sliding assembly (25), and the first pressure controller is electrically connected to the first pressure sensor (31); The second pressure monitoring device comprises: a second pressure sensor (32) and a second pressure controller; The second pressure sensor (32) is mounted on the fourth sliding assembly (27), and the second pressure controller is electrically connected to the second pressure sensor (32).

9. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 8, characterized in that: The four-way centering crimping die (1), the four-way centering pressing mechanism (2) and the telescopic mechanism (5) are installed on a chassis, and a control panel (4), a PLC controller and an alarm device are provided on the chassis; The PLC controller is electrically connected to the stepper motor (7) and the driver of the servo drive device (8), and the PLC controller is electrically connected to the first pressure controller and the second pressure controller.

10. The automatic crimping device for contact pieces of pressure-monitoring electrical connectors according to claim 3, characterized in that: The first sliding assembly (21), the second sliding assembly (23), the third sliding assembly (25) and the fourth sliding assembly (27) are all equipped with a fine adjustment device (211), and the fine adjustment device (211) uses a rotary ruler to connect the pressure head (212) and perform fine adjustment.

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