CN217344612U

CN217344612U - High-precision position control device based on servo motor

Info

Publication number: CN217344612U
Application number: CN202221947740.2U
Authority: CN
Inventors: 张莹超; 翟鹏栋; 王海苗
Original assignee: Henan Zhuoyuan Aviation Power System Co ltd
Current assignee: Henan Zhuoyuan Aviation Power System Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-09-02
Anticipated expiration: 2032-07-27

Abstract

The utility model discloses a high-precision position control device based on a servo motor, which comprises a supporting table, a sliding table rack, a sliding table and a grating ruler, wherein the upper surface of the supporting table is provided with a guide rail, the sliding table rack is connected with the supporting table in a sliding way through the guide rail, the upper surface of the supporting table is provided with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with the sliding table rack, the sliding table rack is provided with a ball screw, two sides of the ball screw are provided with guide rods, the sliding table is connected with the guide rods in a sliding way, the left side of the sliding table rack is provided with the servo motor, the output shaft of the servo motor is connected with the ball screw through a shaft coupling, the grating ruler is arranged at the side surface of the sliding table rack, the upper surface of the sliding table is provided with a top plate, the utility model has novel structural design and convenient operation, the servo motor drives the ball screw to operate through the shaft coupling, the friction force is small, the sensitivity is high, and the detection precision of the grating ruler is high, the output pulse signal is not easy to be interfered, and the positioning device is accurately controlled.

Description

High-precision position control device based on servo motor

Technical Field

The utility model relates to an accurate positioning control technical field of work piece specifically is a high accuracy position control device based on servo motor.

Background

Along with the development of science and technology, the also rapid development of machining trade, people require more and more high to the processing of work piece, thereby the product quality who produces is higher, in the machining trade, often need carry out accurate location to the work piece, the mode commonly used at present adopts the cylinder to promote positioning mechanism and removes, but the distance precision that the cylinder removed is not high, the error is big, and be difficult to control moreover, can't be applicable to high accuracy position control, can't satisfy the demand in the in-service use, so urgent need can the improved technique on the market, in order to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a high accuracy position control device based on servo motor, structural design is novel, convenient operation, servo motor passes through shaft coupling drive ball screw and moves, and frictional force is little, sensitivity is high, and grating chi detects the precision height, and the pulse signal of output is difficult for receiving the interference, realizes the accurate control to positioner, satisfies people's demand, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a high accuracy position control device based on servo motor, includes brace table, slip table frame, slip table and grating chi, the upper surface of brace table is provided with the guide rail, and the slip table frame passes through guide rail and brace table sliding connection, and the brace table upper surface is provided with electric telescopic handle, and electric telescopic handle's flexible end and slip table frame fixed connection install ball screw on the slip table frame, and ball screw's both sides are provided with the guide bar, slip table and guide bar sliding connection, the left side of slip table frame is provided with servo motor, and servo motor's output shaft passes through the shaft coupling and is connected with ball screw, and grating chi sets up in the side of slip table frame, and the slip table upper surface is provided with the roof.

Furthermore, the system also comprises a PLC controller and a counter, wherein the position data measured by the grating ruler is digitally displayed through the counter and then is transmitted to the PLC controller through an RS485 communication protocol, and the PLC controller sends a pulse signal to the servo motor according to an input instruction and a fed-back actual position signal to drive the ball screw to move.

Furthermore, the system also comprises a touch screen, wherein the touch screen is electrically connected with the PLC, and is used for realizing human-computer interaction.

Furthermore, a workpiece placing plate is arranged on the upper surface of the supporting platform and symmetrically arranged on two sides of the guide rail, and supporting legs are arranged on the lower surface of the supporting platform.

Further, be provided with on the roof and compress tightly the cylinder, compress tightly the cylinder and set up to two, compress tightly the flexible end of cylinder and wear to the roof below, the flexible end that compresses tightly the cylinder is connected with the clamp plate, passes through shaft coupling drive ball screw through servo motor and moves, drives the slip table and removes, and the shift position is accurate to it is downward to drive the clamp plate through compressing tightly the cylinder, and then compresses tightly the work piece location.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses on set up electric telescopic handle, can drive slip table frame moving as a whole through electric telescopic handle's flexible, carry out coarse adjustment to slip table frame overall position, through, servo motor passes through shaft coupling drive ball screw operation, and frictional force is little, sensitivity is high, and the grating chi detects the precision height, and the pulse signal of output is difficult for receiving the interference.

2. The utility model discloses a ball screw converts the axle motion into linear motion, and the position detection is realized by the grating chi that links together with ball screw, and the PLC controller is compared its control pulse signal with the input, produces the correction pulse, drives servo motor's forward or reverse rotation to the output position that makes the gear train is unanimous with the expected value, thereby reaches the purpose that makes servo motor accurate positioning.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a left side view of the structure of the present invention;

FIG. 3 is a block diagram of the position control system implemented by the present invention using the comparison command of the PLC to control the servo system;

FIG. 4 is a PLC control circuit diagram of the present invention;

FIG. 5 is a circuit diagram of the grating ruler and the counter of the present invention;

fig. 6 is a circuit diagram of the servo driver of the present invention.

In the figure: 1 electric telescopic rod, 2 guide rails, 3 servo motors, 4 couplers, 5 guide rods, 6 ball screws, 7 sliding tables, 8 top plates, 9 pressing cylinders, 10 grating scales, 11 workpiece placing plates, 12 supporting tables, 13 supporting legs, 14 pressing plates and 15 sliding table frames.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1-6, the present invention provides a technical solution: a high-precision position control device based on a servo motor comprises a support table 12, a sliding table frame 15, a sliding table 7 and a grating ruler 10, wherein a guide rail 2 is arranged on the upper surface of the support table 12, the sliding table frame 15 is in sliding connection with the support table 12 through the guide rail 2, an electric telescopic rod 1 is arranged on the upper surface of the support table 12, the telescopic end of the electric telescopic rod 1 is fixedly connected with the sliding table frame 15, a ball screw 6 is arranged on the sliding table frame 15, guide rods 5 are arranged on two sides of the ball screw 6, the sliding table 7 is in sliding connection with the guide rods 5, the guide rods 5 play a role of guiding the sliding table 7 and reliably support the sliding table 7, so that the structure is firmer, the servo motor 3 is arranged on the left side of the sliding table frame 15, an output shaft of the servo motor 3 is connected with the ball screw 6 through a coupler 4, the grating ruler 10 is arranged on the side surface of the sliding table frame 15, and a top plate 8 is arranged on the upper surface of the sliding table 7, the upper surface of brace table 12 is provided with the work piece and places board 11, the work piece is placed board 11 symmetry and is set up in the both sides of guide rail 2, the lower surface of brace table 12 is provided with supporting leg 13, be provided with on the roof 8 and compress tightly cylinder 9, compress tightly cylinder 9 and set up to two, the flexible end that compresses tightly cylinder 9 wears to roof 8 below, the flexible end that compresses tightly cylinder 9 is connected with clamp plate 14, pass through shaft coupling 4 drive ball screw 6 through servo motor 3 and move, it removes to drive slip table 7, the shift position is accurate, and it is downward to drive clamp plate 14 through compressing tightly cylinder 9, and then compress tightly the work piece location.

Still include PLC controller, counter, the position data that grating ruler 10 surveyed comes out through the counter digital display, and the PLC controller is given to rethread RS485 communication protocol, and the PLC controller sends pulse signal to servo motor 3 according to the instruction of input and the actual position signal of feedback, drives ball screw 6 motion, still includes the touch-sensitive screen, and the touch-sensitive screen is connected with the PLC controller electricity, and the touch-sensitive screen is used for realizing man-machine interaction.

The servo motor 3 is a core actuating mechanism, drives the ball screw 6 to move, and converts the rotary motion into linear motion through a speed reducing mechanism; the pulse and the direction command sent by the PLC controller are converted into voltage or current to control the speed and start and stop of the servo motor 3, and the feedback signal from the servo motor encoder is processed, and the precision of the rotating speed or the position can be adjusted by configuring the gear ratio of the servo motor; the PLC combines a microprocessor, an integrated power supply, an input and output circuit, a built-in PROFINET, a high-speed motion control I/O and an on-board analog input into a compact shell to form a powerful controller; and comparing the set parameter with the actual parameter through programming, and outputting the changed control quantity.

An RS485 module: and the RS485 module realizes communication between the counter and the PLC and reads an actual position signal into the PLC.

A grating ruler: the grating ruler is used for measuring the actual position of the ball screw, the precision is high, and the output pulse signals are not easily interfered.

A counter: the counter is used for reading the signal output by the grating ruler and converting the signal into an actual position quantity, and has a communication function.

When in use: electric telescopic handle 1's flexible can drive slip table frame 15 overall movement, carry out coarse adjustment to slip table frame 15 overall position, servo motor 3 passes through shaft coupling 4 drive ball screw 6 and rotates, ball screw 6 becomes linear motion with rotary motion, drive slip table 7 and remove, the position data that grating chi 10 surveyed comes out through the counter digital display, PLC controller is sent to rethread RS485 communication protocol, PLC is according to the actual position signal of the instruction of input and feedback, send pulse signal to servo motor 3, drive ball screw 6's motion, thereby realize positioning control, it is downward to drive clamp plate 14 through compressing tightly cylinder 9, and then compress tightly the work piece location.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high accuracy position control device based on servo motor, includes brace table (12), slip table frame (15), slip table (7) and grating chi (10), its characterized in that: the upper surface of brace table (12) is provided with guide rail (2), and slip table frame (15) are through guide rail (2) and brace table (12) sliding connection, and brace table (12) upper surface is provided with electric telescopic handle (1), and the flexible end and slip table frame (15) fixed connection of electric telescopic handle (1) install ball screw (6) on slip table frame (15), and the both sides of ball screw (6) are provided with guide bar (5), slip table (7) and guide bar (5) sliding connection, the left side of slip table frame (15) are provided with servo motor (3), and the output shaft of servo motor (3) passes through shaft coupling (4) and is connected with ball screw (6), and grating chi (10) set up in the side of slip table frame (15), and slip table (7) upper surface is provided with roof (8).

2. A high accuracy position control apparatus based on servo motor according to claim 1, characterized in that: the device is characterized by further comprising a PLC (programmable logic controller) and a counter, position data measured by the grating ruler (10) are displayed through the counter in a digital mode and then are transmitted to the PLC through an RS485 communication protocol, and the PLC sends pulse signals to the servo motor (3) according to input instructions and fed back actual position signals to drive the ball screw (6) to move.

3. A high accuracy position control apparatus based on servo motor according to claim 2, characterized in that: the PLC is characterized by further comprising a touch screen, the touch screen is electrically connected with the PLC, and the touch screen is used for achieving man-machine interaction.

4. A high-precision position control device based on a servo motor according to claim 1, characterized in that: the upper surface of the supporting platform (12) is provided with a workpiece placing plate (11), the workpiece placing plates (11) are symmetrically arranged on two sides of the guide rail (2), and the lower surface of the supporting platform (12) is provided with supporting legs (13).

5. A high-precision position control device based on a servo motor according to claim 4, characterized in that: be provided with on roof (8) and compress tightly cylinder (9), compress tightly cylinder (9) and set up to two, compress tightly the flexible end of cylinder (9) and wear to roof (8) below, compress tightly the flexible end of cylinder (9) and be connected with clamp plate (14).