CN201726352U - Double-screw machine tool synchronous driving device - Google Patents

Abstract

The utility model discloses a double-screw machine tool synchronous driving device, which belongs to the synchronous driving technical field of machine tool main shafts. A main servo driver receives position signals which are output by a programmable controller, the main servo driver outputs the position signals to control a main servo motor, the main servo motor drives a main screw to rotate, an encoder in the main servo motor outputs practical position signals of the main servo motor to a main servo driver, the main servo driver outputs the practical position signals output by the encoder to a slave servo driver, the slave servo driver controls a slave servo motor according to the received practical position signals, and the slave servo motor drives a slave screw to rotate. The double-screw machine tool synchronous driving device achieves main-slave shaft synchronous driving of a machine tool, simultaneously greatly saves the equipment input, and increases the reliability, the economy and the applicability of a system.

Description

Synchronous drive device for double screw machine tools

technical field

The utility model relates to a synchronous driving device for a machine tool with double screw rods. the

Background technique

The synchronous drive of the drive shaft of the random bed is a problem faced by all medium and large equipment, and it has important practical significance for the precision manufacturing industry. At present, at home and abroad, the synchronous drive of the machine tool spindle is mainly completed by the CNC numerical control system (the main foreign CNC numerical control system manufacturers include SIEMENS, FANAC, FAGOR, etc.). Taking the FAGOR system as an example, its synchronization mainly adopts the speed control method. Through the control, the timely running speed of the X and U axis servo motors is the same, so that the X and U axes can run at the same displacement in the same time to achieve timely position synchronization. Purpose. the

When the machine tool adopts the CNC control system, the CNC controller needs to control the servo driver on the hardware, and then the servo driver controls the servo motor. In this way, the integrated system is expensive and the control structure is complicated. For lathes with relatively simple functions and relatively low dynamic performance requirements (such as precision drilling machines), if a CNC controller is used, many complex functions of the CNC controller are not used in the application device, resulting in a great waste of resources. the

Utility Model Contents

The purpose of the utility model is to provide a synchronous drive device for a double-screw machine tool capable of synchronously driving the dual spindles of the machine tool.

The technical scheme of the utility model is: a synchronous driving device for a double screw machine tool, including a main servo driver receiving the position signal output by the programmable controller, the main servo driver outputting the position signal to control the main servo motor, and the main servo motor Drive the main screw to rotate, the encoder in the main servo motor outputs the actual position signal of the main servo motor to the main servo driver, and the main servo driver outputs the actual position signal output by the encoder to the slave servo driver, so The slave servo driver controls the slave servo motor according to the received actual position signal, and the slave servo motor drives the slave screw to rotate. the

The rotation position of the master servo motor is synchronized with the rotation position of the slave servo motor. the

The moving position command of the system is issued by the programmable controller PLC, the command is sent to the main servo driver, the main servo driver executes the command and drives the main servo motor to work, the main servo motor encoder derives the actual position signal of the main servo motor, the main servo driver The actual position signal of the master servo motor is output as a control signal to the slave servo driver, and the slave servo driver tracks the transmitted position signal in time, so as to achieve the position synchronization of the master and slave servo motors. Since the slave servo tracks the position of the master servo in a timely manner, good dynamic performance can be achieved. the

The beneficial effects of the utility model are: the synchronous drive of the master and slave axes of the machine tool is achieved, and at the same time, equipment investment is greatly saved, and the reliability, economy and applicability of the system are improved. the

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described. the

Description of drawings

Accompanying drawing 1 is the schematic diagram of the utility model principle. the

Detailed ways

preferred embodiment

As shown in the accompanying drawings, a synchronous drive device for a double screw machine tool includes a main servo driver that receives a position signal output by a programmable controller, the main servo driver outputs a position signal to control a main servo motor, and the main servo motor drives the main screw rotates, the encoder in the main servo motor outputs the actual position signal of the main servo motor to the main servo driver, and the main servo driver outputs the actual position signal output by the encoder to the slave servo driver, and the slave The servo driver controls the slave servo motor according to the received actual position signal, and the slave servo motor drives the slave screw to rotate. In order to synchronize the master and slave screw rods, it is required that the rotational positions of the master and slave servo motors be the same in time, that is to say, the rotational position of the master servo motor is synchronized with the rotational position of the slave servo motor. Since the slave servo motor tracks the position of the master servo motor in a timely manner, good dynamic performance can be achieved. the

The master-slave servo driver described in this embodiment adopts Schneider servo driver LEXUM05A. The movement position command of the machine tool system is issued by the programmable controller PLC (that is, the logic controller), and the command is sent to the main servo driver through the bus, and the main servo driver executes the command and drives the main servo motor to work. On the CN5 port of the main servo drive, output the actual position signal of the motor, which is derived from the encoder of the main servo motor. The basic resolution output by CN5 port of Schneider main servo drive LEXUM05A is 4096 increments per revolution. The position signal sent by the main servo driver is used as a control signal and added to the CN5 port of the slave servo driver. The slave servo driver tracks the transmitted position signal in a timely manner, and uses the analyzed position signal to control the output position of the slave servo driver, so as to achieve the position synchronization of the master and slave servo motors. Since the slave servo tracks the position of the master servo in a timely manner, good dynamic performance can be achieved. Schneider has set the working mode of the servo driver LEXUM05A to run as an electronic gearbox, and at this time, the resolution of its input motor is 131072 motor increments/per revolution. In order to synchronize the master and slave axes of the servo, that is to say, the rotation positions of the master and slave motors are required to be the same in time. When the main shaft servo motor makes one revolution (4096 increments are output per revolution), the slave axis servo motor also makes one revolution ( Receive 131072 motor increments, can make one revolution) .

All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and/or steps. the

Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (2)

1. double lead lathe synchronous drive device, comprise that the main servo driver receives the position signalling of Programmable Logic Controller output, described main servo driver outgoing position signal controlling main servo motor, described main servo motor-driven master screw mandrel rotates, encoder in the described main servo motor is exported to the main servo driver with main servo motor actual position signal, it is characterized in that: described main servo driver exports to the actual position signal of described encoder output from servo-driver, described from servo-driver according to the control of the actual position signal that receives from servomotor, describedly rotate from screw mandrel from driven by servomotor.

2. double lead lathe synchronous drive device according to claim 1 is characterized in that: described main servo motor turned position and described synchronous from the servomotor turned position.