Servo press and press fitting system

Abstract

The utility model provides a servo pressing machine and a press fitting system. The servo pressing machine comprises a servo driving piece, a pressing piece and a pressing piece, the downward pressing executing mechanism is connected with the servo driving part, the servo driving part is used for driving the downward pressing executing mechanism to move, and the downward pressing executing mechanism comprises a pressing head; the sensor module is at least used for monitoring pressure and displacement in the press-fitting process of the pressure head; the monitor is electrically connected with the sensor module, and the monitor is used for determining a press fitting result according to the pressure and displacement monitored by the sensor module; and the programmable logic controller is electrically connected with the monitor and the servo driving part, and the programmable logic controller is used for generating an alarm signal according to the press-fitting result and / or generating display information according to the press-fitting result. The servo press provided by the embodiment of the utility model is simple in structure, lower in cost and favorable for assembly, and the monitor and the programmable logic controller support secondary development, so that secondary development can be carried out according to user requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of pressing, and particularly relates to a servo press and a pressing system. Background Art

[0002] The production process of a steering gear in an automobile involves a pressing process, and the pressing process is usually carried out by a pressing system.

[0003] The pressing system includes a press, and the press is driven and controlled by a motor. However, the existing pressing system needs to be purchased as a complete set, with a long supply cycle, high cost, and limited secondary development. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a servo press to at least solve the technical problems that the existing pressing system needs to be purchased as a complete set, has a long supply cycle, high cost, and limited secondary development.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A servo press includes:

[0007] A servo drive;

[0008] A downward pressing actuator connected to the servo drive, the servo drive being used to drive the downward pressing actuator to move, and the downward pressing actuator including a pressing head;

[0009] A sensor module at least for monitoring the pressure and displacement during the pressing process of the pressing head;

[0010] A monitor electrically connected to the sensor module, the monitor being used to determine the pressing result according to the pressure and displacement monitored by the sensor module;

[0011] A programmable logic controller electrically connected to the monitor and the servo drive, the programmable logic controller being used to generate an alarm signal according to the pressing result, and / or generate display information according to the pressing result.

[0012] Optionally, it further includes a servo driver, the programmable logic controller is electrically connected to the servo drive through the servo driver, the servo driver is electrically connected to a main power line, a contactor is arranged on the main power line, and the programmable logic controller is electrically connected to the contactor.

[0013] Optionally, the main power line is used to connect to a power supply, and an air switch is arranged on the main power line, and the air switch is located between the power supply and the contactor.

[0014] Optionally, it further includes an audible and visual alarm and / or a display screen. The programmable logic controller is electrically connected to the audible and visual alarm and / or the display screen, and is further configured to send the alarm signal to the audible and visual alarm and / or send the display information to the display screen.

[0015] Optionally, the servo driver includes a first control power supply terminal and a second control power supply terminal. The first control power supply terminal and the second control power supply terminal are respectively electrically connected to a first control power supply line and a second control power supply line, and the first control power supply line and the second control power supply line are respectively connected to the positive and negative poles of a low-voltage DC power supply.

[0016] Optionally, the monitor includes a first power supply terminal and a second power supply terminal. The first power supply terminal and the second power supply terminal are respectively electrically connected to a first power supply line and a second power supply line, and the first power supply line and the second power supply line are respectively connected to the positive and negative poles of a low-voltage DC power supply.

[0017] Optionally, the sensor module includes a pressure sensor and a displacement sensor. The pressure sensor is installed on the pressure head;

[0018] The monitor includes a first interface, a second interface, and a communication interface. The first interface is electrically connected to the pressure sensor, the second interface is electrically connected to the displacement sensor, and the communication interface is electrically connected to the programmable logic controller.

[0019] Optionally, the servo driver includes an encoder and a voltage output terminal. The encoder and the voltage output terminal are electrically connected to the servo drive member.

[0020] Optionally, the downward pressing actuator further includes a lead screw, a ball nut disposed on the lead screw, and a push rod connected to the ball nut. The servo drive member is connected to the lead screw, and the servo drive member is configured to drive the lead screw to rotate. The pressure head is connected to the push rod.

[0021] Compared with the prior art, the servo press of the present utility model has the following advantages:

[0022] The servo press provided by the embodiment of the present utility model has a simple structure, low cost, is conducive to assembly, and the monitor and programmable logic controller support secondary development and can be developed according to user requirements. Moreover, each component in the servo press is convenient to purchase, which can shorten the supply cycle, and there is no need to purchase a complete set of press-fitting systems that are expensive, have a long supply cycle, and are limited in secondary development. In addition, through the sensor module, the pressure and displacement during the press-fitting process of the press head can be monitored, and through the monitor, the press-fitting result can be determined according to the pressure and displacement monitored by the sensor module. That is to say, the servo press can monitor the process of the press head pressing down through the sensor module, and whether there is an abnormality in the press-fitting can be determined according to the press-fitting result determined by the monitor. In addition, through the electrical connection between the monitor and the programmable logic controller, the monitor can also send the press-fitting result to the programmable logic controller, so that the programmable logic controller generates an alarm signal according to the press-fitting result, and / or so that the programmable logic controller generates display information according to the press-fitting result.

[0023] Another object of the present utility model is to provide a press-fitting system to solve the technical problems in the prior art that the press-fitting system needs to be purchased as a complete set, has a long supply cycle, high cost, and is limited in secondary development.

[0024] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0025] A press-fitting system, the press-fitting system includes the servo press described in any one of the above.

[0026] The press-fitting system has the same advantages as the above servo press compared with the prior art, and will not be elaborated here. Description of the Drawings

[0027] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0028] Figure 1 It is a schematic diagram of the electrical connection structure of a servo press provided by an embodiment of the present utility model;

[0029] Figure 2 It is a schematic diagram of the electrical connection structure of another servo press provided by an embodiment of the present utility model;

[0030] Figure 3 It is a schematic diagram of the electrical connection structure of the main power line, air switch and power supply in the servo press provided by an embodiment of the present utility model;

[0031] Figure 4 It is a schematic diagram of the electrical connection structure of the servo driver, contactor and servo drive member in the servo press provided by an embodiment of the present utility model;

[0032] Figure 5 This is a schematic diagram of the electrical connection structure between the monitor, pressure sensor, and displacement sensor in the servo press provided by the embodiment of the present utility model.

[0033] Description of the reference numerals:

[0034] 1 - Servo drive, 2 - Sensor module, 201 - Pressure sensor, 202 - Displacement sensor, 3 - Monitor, 301 - First interface, 302 - Second interface, 4 - Programmable logic controller, 5 - Servo driver, 6 - Contactor, 7 - Air switch, 8 - Acousto - optic alarm, 9 - Display screen, 10 - Main power line, 11 - Power supply, 12 - First control power line, 13 - Second control power line, 14 - Power cable, 15 - Encoder cable, 16 - First power line, 17 - Second power line. Specific embodiments

[0035] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0036] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] In a first aspect, referring to Figure 1 , the embodiment of the present utility model provides a servo press, including: a servo drive 1; a downward pressing execution mechanism connected to the servo drive 1, the servo drive 1 being used to drive the downward pressing execution mechanism to move, the downward pressing execution mechanism including a pressing head; a sensor module 2 at least used to monitor the pressure and displacement during the pressing process of the pressing head; a monitor 3 electrically connected to the sensor module 2, the monitor 3 being used to determine the pressing result according to the pressure and displacement monitored by the sensor module 2; a programmable logic controller (PLC) 4 electrically connected to the monitor 3 and the servo drive 1, the programmable logic controller 4 being used to generate an alarm signal according to the pressing result, and / or generate display information according to the pressing result.

[0038] Specifically, the servo press is applied to a pressing system, and the pressing system is used for pressing during the production process of a steering gear. The servo drive 1 can be a servo motor. The pressing head is used for pressing a workpiece. The servo drive 1 can drive the downward pressing execution mechanism to move, so that the pressing head in the downward pressing execution mechanism moves, thereby generating displacement. After the pressing head contacts the workpiece, the pressing head will also apply pressure to the workpiece.

[0039] The sensor module 2 may include a pressure sensor 201 and a displacement sensor 202. The pressure sensor 201 is used to monitor the magnitude of the pressure during the pressing process of the indenter, and the displacement sensor 202 is used to monitor the magnitude of the displacement during the pressing process of the indenter. The monitor 3 collects the signals of the pressure sensor 201 and the displacement sensor 202 in real time, and draws a pressure-displacement curve based on the pressure and displacement during the pressing process of the indenter, and analyzes the pressure-displacement curve to determine whether the pressing process is qualified. If the pressing process is qualified, the pressing result is output as qualified; if the pressing process is unqualified, the pressing result is output as unqualified.

[0040] The programmable logic controller 4 can control the operation of the servo drive member 1 through the servo driver 5. The monitor 3 is electrically connected to the programmable logic controller 4. The monitor 3 can send the pressing result to the programmable logic controller 4. After receiving the pressing result sent by the monitor 3, the programmable logic controller 4 will generate an alarm signal according to the pressing result, and / or generate a display message according to the pressing result. Specifically, the programmable logic controller 4 generates an alarm signal when the pressing result is unqualified. In one embodiment, the programmable logic controller 4 can send the alarm signal to the audible and visual alarm 8 to make the audible and visual alarm 8 give an alarm. The alarm signal can be a high-level signal. In one embodiment, the programmable logic controller 4 can send the display message to the display screen 9 to make the display screen 9 display the display message.

[0041] The servo press provided by the embodiment of the present utility model has a simple structure, low cost, is conducive to assembly, and the monitor and the programmable logic controller support secondary development and can be developed according to user needs. In addition, each component in the servo press is convenient to purchase, which can shorten the supply cycle, and there is no need to purchase a complete pressing system that is expensive, has a long supply cycle and is limited in secondary development. In addition, through the sensor module 2, the pressure and displacement during the pressing process of the indenter can be monitored, and through the monitor 3, the pressing result can be determined according to the pressure and displacement monitored by the sensor module 2. That is, the servo press can realize the monitoring of the indenter pressing process through the sensor module 2, and whether there is an abnormality in the pressing can be determined according to the pressing result determined by the monitor 3. In addition, through the electrical connection between the monitor 3 and the programmable logic controller 4, the monitor 3 can also send the pressing result to the programmable logic controller 4, so that the programmable logic controller 4 generates an alarm signal according to the pressing result, and / or so that the programmable logic controller 4 generates a display message according to the pressing result.

[0042] In a preferred embodiment of the present utility model, with reference to Figure 2 and Figure 4, the servo press further includes a servo driver 5. The programmable logic controller 4 is electrically connected to the servo driving member 1 through the servo driver 5. The servo driver 5 is electrically connected to a main power line 10. A contactor 6 is provided on the main power line 10, and the programmable logic controller 4 is electrically connected to the contactor 6.

[0043] Specifically, the servo driver 5 is a driving mechanism of the servo driving member 1 for controlling the rotation of the servo driving member 1. The servo driver 5 can be a three-phase AC220V driver. When the power of the servo driver 5 is below 750W, single-phase AC220 power supply can be adopted. The main power line 10 can include a ZL1 main power line and a ZL2 main power line. The servo driver 5 includes an X1 interface. The X1 interface includes an L1 terminal and an L3 terminal. The L1 terminal and the L3 terminal are respectively connected to the ZL1 main power line and the ZL2 main power line.

[0044] Contactors 6 are provided on both the ZL1 main power line and the ZL2 main power line. The programmable logic controller 4 can control the contactor 6 to close or open. Under the control of the programmable logic controller 4, the contactor 6 can connect or disconnect the main power line 10, thereby controlling the power supply of the servo driver 5. The main power circuit of the servo driver 5 includes the main power line 10. The contactor 6 is an execution element for the programmable logic controller 4 to control the closing of the main power circuit of the servo driver 5.

[0045] In a preferred embodiment of the present invention, referring to Figure 2 and Figure 3 , the main power line 10 is used to connect to a power supply 11. An air switch 7 is provided on the main power line 10. The air switch 7 is located between the power supply 11 and the contactor 6.

[0046] Specifically, air switches 7 are provided on both the ZL1 main power line and the ZL2 main power line. The power supply 11 is a power supply that provides power for the servo press. The power supply 11 can be a single-phase AC220 power supply. When the power supply 11 is a single-phase AC220 power supply, the ZL1 main power line and the ZL2 main power line are respectively connected to the zero line and the mains live wire. When the air switch 7 is closed, external current flows into the contacts of the contactor 6 and finally flows into the servo driver 5. The air switch 7 is a protection switch for the power circuit of the servo driver 5. It can trip and disconnect the power circuit of the servo driver 5 in case of overload to prevent damage to the servo driver 5.

[0047] In a preferred embodiment of the present invention, referring to Figure 2 , the servo press further includes an audible and visual alarm 8 and / or a display screen 9. The programmable logic controller 4 is electrically connected to the audible and visual alarm 8 and / or the display screen 9. The programmable logic controller 4 is also used to send an alarm signal to the audible and visual alarm 8, and / or send display information to the display screen 9.

[0048] Among them, after the programmable logic controller 4 receives the pressing result sent by the monitor 3, if the pressing result is unqualified, an alarm signal will be generated and sent to the audible and visual alarm 8 to make the audible and visual alarm 8 give an alarm; and / or, after the programmable logic controller 4 receives the pressing result sent by the monitor 3, display information will be generated according to the pressing result and sent to the display screen 9 to make the display screen 9 display the display information. Among them, the display information includes the corresponding pressing result. The audible and visual alarm is a device that can emit sound and light signals. The audible and visual alarm includes a warning light and a sound generator. The warning light can display at least two colors, green and red. The audible and visual alarm 8 giving an alarm specifically includes: the warning light in the audible and visual alarm displays red, and the sound generator emits an alarm sound.

[0049] In a preferred embodiment of the present invention, referring to Figure 4 , the servo driver 5 includes a first control power supply terminal and a second control power supply terminal. The first control power supply terminal and the second control power supply terminal are respectively electrically connected to a first control power supply line 12 and a second control power supply line 13. The first control power supply line 12 and the second control power supply line 13 are respectively connected to the positive and negative poles of the low-voltage DC power supply. Among them, the first control power supply terminal is specifically the +24V terminal in the servo driver 5, and the second control power supply terminal is specifically the M terminal in the servo driver 5. The low-voltage DC power supply can be a DC24V power supply.

[0050] In a preferred embodiment of the present invention, referring to Figure 5 , the monitor 3 includes a first power supply terminal and a second power supply terminal. The first power supply terminal and the second power supply terminal are respectively electrically connected to a first power supply line 16 and a second power supply line 17. The first power supply line 16 and the second power supply line 17 are respectively connected to the positive and negative poles of the low-voltage DC power supply. Among them, the monitor 3 includes an X1 interface. The X1 interface includes a 24V terminal and a GND terminal. The first power supply terminal is specifically the 24V terminal in the monitor 3, and the second power supply terminal is specifically the GND terminal in the monitor 3. The low-voltage DC power supply can be a DC24V power supply. The X1 interface further includes a PE terminal, and the PE terminal can be grounded.

[0051] In a preferred embodiment of the present invention, referring to Figure 2 and Figure 5 , the sensor module 2 includes a pressure sensor 201 and a displacement sensor 202. The pressure sensor 201 is installed on the pressing head; the monitor 3 includes a first interface 301, a second interface 302 and a communication interface. The first interface 301 is electrically connected to the pressure sensor 201, the second interface 302 is electrically connected to the displacement sensor 202, and the communication interface is electrically connected to the programmable logic controller 4. Among them, the first interface 301 is specifically the X6 interface in the monitor 3, and the second interface 302 is specifically the X8 interface in the monitor 3.

[0052] In a preferred embodiment of the present utility model, referring to Figure 4 , the servo driver includes an encoder and a voltage output terminal, and the encoder and the voltage output terminal are electrically connected to the servo driving member.

[0053] Specifically, the servo driver 5 includes an X2 interface. The voltage output terminals of the servo driver 5 include the U terminal, V terminal, W terminal, and PE terminal in the X2 interface. The servo driver 5 is electrically connected to the servo driving member 1 through the U terminal, V terminal, W terminal, and PE terminal to output voltage to control the operation of the servo driving member 1. The U terminal, V terminal, W terminal, and PE terminal of the servo driver 5 are electrically connected to the servo driving member 1 through a power cable 14. The encoder in the servo driver 5 is specifically electrically connected to the servo driving member 1 through the X9 interface of the servo driver 5. The X9 interface of the servo driver 5 is electrically connected to the servo driving member 1 through an encoder cable 15. The servo driver 5 can receive the position feedback from the servo driving member 1 through the encoder.

[0054] After the programmable logic controller 4 controls the contactor 6 to close, the external current flows into the L1 terminal and L3 terminal of the servo driver 5, and the current provided by the low-voltage DC power supply flows into the +24V terminal and M terminal of the servo driver 5. The servo driver 5 starts. The servo driver 5 converts through an internal circuit and outputs voltage through the voltage output terminal to control the operation of the servo driving member 1, and receives the position feedback from the servo driving member 1 through the encoder.

[0055] In a preferred embodiment of the present utility model, the pressing actuator further includes a lead screw, a ball nut disposed on the lead screw, and a push rod connected to the ball nut. The servo driving member 1 is connected to the lead screw, and the servo driving member 1 is used to drive the lead screw to rotate. The pressing head is connected to the push rod.

[0056] Wherein, the output shaft of the servo driving member 1 can be directly connected to the lead screw. The servo driving member 1 can also be connected to the lead screw through a transmission mechanism. The transmission mechanism can include a first synchronous pulley, a second synchronous pulley, and a synchronous belt sleeved on the first synchronous pulley and the second synchronous pulley. The first synchronous pulley is connected to the output shaft of the servo driving member 1, and the second synchronous pulley is connected to the lead screw. When the servo driving member 1 operates, it drives the lead screw to rotate. When the lead screw rotates, the ball nut on the lead screw moves back and forth along the lead screw, thereby driving the push rod connected to the ball nut to perform a linear motion.

[0057] During the working process of the above servo press, the servo driver 5 can be set to the position mode. The position and speed of the pressing head can be controlled through the programmable logic controller 4. The real-time displacement and pressure of the pressing head can be monitored through the displacement sensor 202 and the pressure sensor 201. A pressure-displacement curve can be generated through the monitor 3, and the pressure-displacement curve can be analyzed to generate a determination result of the pressing process, that is, a pressing result is generated.

[0058] The working process of the above servo press can be as follows:

[0059] S1. The air switch 7 is closed, and the external current flows into the main power supply circuit of the servo driver 5.

[0060] S2. Set the speed and displacement of the ram during the pressing process in the programmable logic controller 4.

[0061] S3. The programmable logic controller 4 controls the contactor 6 to close. The external current flows into the L1 and L3 terminals of the servo driver 5, and the current provided by the low-voltage DC power supply flows into the +24V terminal and the M terminal of the servo driver 5, and the servo driver 5 starts.

[0062] S4. The programmable logic controller 4 controls the servo motor to rotate according to the set speed and displacement, and the servo motor drives the ram in the downward pressing actuator to move.

[0063] S5. The ram starts to contact and press the workpiece, and at the same time, the monitor 3 collects the pressure and displacement of the ram during the pressing process.

[0064] S6. The monitor 3 analyzes the pressing data, that is, the pressure and displacement of the ram during the pressing process, and gives the pressing result.

[0065] S7. The monitor 3 sends the pressing data and the pressing result to the programmable logic controller 4.

[0066] S8. After receiving the pressing result sent by the monitor 3, when the pressing result is unqualified, the programmable logic controller 4 controls the sound and light alarm 8 to alarm, and / or sends the pressing result to the display screen 9 so that the display screen 9 displays the pressing result.

[0067] It can be understood that the above examples are only examples listed for better understanding of the technical solutions of the embodiments of the present invention, and do not serve as the sole limitation to the embodiments of the present invention.

[0068] In a second aspect, the present invention provides a pressing system, which includes the servo press of any one of the above first aspects. And because the pressing system includes the above servo press, it also has the beneficial effects of the above servo press.

[0069] The pressing system provided by the embodiments of the present invention includes each structure of the servo press in any one of the above embodiments. To avoid repetition, it will not be described in detail here.

[0070] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

[0071] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the above elements.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A servo press, characterized in that: include: Servo drive components; A pressing actuator connected to the servo driver, the servo driver is used to drive the pressing actuator to move, and the pressing actuator includes a pressing head; A sensor module, at least used to monitor the pressure and displacement of the pressing head during the pressing process; A monitoring instrument, electrically connected to the sensor module, and configured to determine a press-fitting result according to the pressure and displacement monitored by the sensor module; A programmable logic controller is electrically connected to the monitoring instrument and the servo drive, and the programmable logic controller is used to generate an alarm signal according to the press-fitting result, and / or generate display information according to the press-fitting result.

2. The servo press according to claim 1, characterized in that: It also includes a servo driver, the programmable logic controller is electrically connected to the servo drive component through the servo driver, the servo driver is electrically connected to a main power line, a contactor is arranged on the main power line, and the programmable logic controller is electrically connected to the contactor.

3. The servo press according to claim 2, characterized in that: The main power line is used to connect to a power supply. An air switch is provided on the main power line. The air switch is located between the power supply and the contactor.

4. The servo press according to claim 1, characterized in that: It also includes an audible and visual alarm and / or a display screen, and the programmable logic controller is electrically connected to the audible and visual alarm and / or the display screen. The programmable logic controller is also used to send the alarm signal to the audible and visual alarm and / or send the display information to the display screen.

5. The servo press according to claim 2, characterized in that: The servo driver includes a first control power supply terminal and a second control power supply terminal, the first control power supply terminal and the second control power supply terminal are electrically connected to a first control power line and a second control power line, respectively, and the first control power line and the second control power line are connected to the positive and negative poles of a low-voltage DC power supply, respectively.

6. The servo press according to claim 1, characterized in that: The monitoring instrument includes a first power supply end and a second power supply end, the first power supply end and the second power supply end are electrically connected to a first power line and a second power line respectively, and the first power line and the second power line are respectively connected to the positive and negative poles of a low-voltage DC power supply.

7. The servo press according to claim 1, characterized in that: The sensor module includes a pressure sensor and a displacement sensor, and the pressure sensor is mounted on the pressure head; The monitoring instrument includes a first interface, a second interface and a communication interface, the first interface is electrically connected to the pressure sensor, the second interface is electrically connected to the displacement sensor, and the communication interface is electrically connected to the programmable logic controller.

8. The servo press according to claim 2, characterized in that: The servo driver comprises an encoder and a voltage output terminal, and the encoder and the voltage output terminal are electrically connected to the servo driver.

9. The servo press according to claim 1, characterized in that: The pressing actuator also includes a lead screw, a ball nut arranged on the lead screw and a push rod connected to the ball nut, the servo drive is connected to the lead screw, the servo drive is used to drive the lead screw to rotate, and the pressure head is connected to the push rod.

10. A press-fitting system, characterized in that: The press-fitting system comprises the servo press according to any one of claims 1 to 9.

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