Transmission sensing device of automatic tool changing system of tool magazine of servo worm and gear processing machine tool

Abstract

The utility model relates to the technical field of machining tool tools, in particular to a transmission induction device of an automatic tool changing system of a servo worm and gear machining tool magazine. The transmission worm gear mechanism is arranged in the machine frame shell, the transmission worm mechanism is arranged in the machine frame shell in a penetrating mode and matched with the transmission worm gear mechanism to be connected in a meshed mode, and the output shaft assembly is arranged in the machine frame shell and driven by the transmission worm gear mechanism. And an encoder and a controller for receiving data, transmitting data and controlling are also arranged in the servo motor. The utility model has the beneficial effects that the technical scheme adopts worm and gear transmission, the reduction ratio required by transmission operation is in place at one time, the braking performance is good, and the accuracy is high; an encoder is arranged in the motor to directly transmit operation data to a controller, functions of a cam and three sensors can be completely simulated through programming, and signals are transmitted to a machine tool control system without difference.

Description

Technical Field

[0001] This utility model relates to the field of machine tool cutting technology, and in particular to a transmission sensing device for an automatic tool changer system of a servo worm gear machine tool. Background Technology

[0002] In the existing technology, CN202320654463.4 describes a wear-resistant combined worm gear structure. The input transmission method of the automatic tool changer system for machine tools is: a general motor plus an electromagnetic brake with a reduction gearbox plus a bevel gear set. Although the bevel gear set can withstand large operating inertia and strong structural rigidity, it is limited by the reduction ratio. Its inability to transmit a large reduction ratio is its fatal flaw. Therefore, another reduction gearbox is needed to achieve the maximum operating speed that the automatic tool changer system can withstand. Since the two need to cooperate with each other, the cost increases, the transmission power decreases due to the two transmission mechanisms, and the accuracy is also distorted due to the two transmission mechanisms. The control of the system's operation is completed by a set of combined cams and three sensors.

[0003] The current system has the following disadvantages: the main transmission method of the motor with electromagnetic brake is a single speed with no adjustment. If the system operates frequently, the motor and electromagnetic brake will generate high temperatures. The system uses three sensors and cams to control the system action, which results in a slow response time and requires the addition of a cam transmission mechanism, which increases the cost.

[0004] Therefore, it is necessary to design a transmission sensing device for an automatic tool changer system of a servo worm gear machining machine tool to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a transmission sensing device for an automatic tool changer system of a servo worm gear machining machine tool, so as to overcome the above-mentioned shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A transmission sensing device for an automatic tool changer system of a servo worm gear machining machine tool includes a frame housing. The device is characterized by: a transmission worm gear mechanism disposed within the frame housing; a transmission worm gear mechanism disposed within the frame housing and meshing with the transmission worm gear mechanism; and an output shaft assembly disposed within the frame housing and driven by the transmission worm gear mechanism. The transmission worm gear mechanism includes a screw, an upper transmission assembly mounted on the upper part of the screw, a lower transmission assembly mounted on the lower part of the screw, and a servo motor driving the screw to rotate. An encoder and a controller for receiving, transmitting, and controlling data are also disposed within the servo motor.

[0008] Preferably, the upper transmission assembly includes a servo motor mounting plate for drive installation, a servo motor mounting plate eccentric adjustment block, an upper screw eccentric flange connected to the servo motor mounting plate eccentric adjustment block via a nut, an upper screw adjustment nut installed with the upper screw eccentric flange, an oil seal placed inside the servo motor mounting plate, and a bearing sleeved outside the screw. A sealing ring is also provided outside the upper screw eccentric flange.

[0009] Preferably, the lower transmission assembly includes a lower screw eccentric flange placed inside the frame housing, an oil seal placed inside the lower screw eccentric flange, a lower screw adjusting nut installed in conjunction with the lower screw eccentric flange, and a lower bearing placed inside the lower screw adjusting nut and sleeved on the screw; both the lower screw eccentric flange and the lower screw adjusting nut are fitted with sealing rings.

[0010] Preferably, the servo motor is a servo motor.

[0011] The beneficial effects of this utility model are as follows: This technical solution adopts worm gear transmission, which achieves the required reduction ratio in one go, with good braking performance and high precision; the encoder built into the motor directly transmits the operating data to the controller, and the function of the cam and three sensors can be completely simulated by programming, transmitting the signal to the machine tool control system without discrimination. Therefore, signal problems do not require disassembling the system mechanism, but only need to be checked and reset on the controller, which increases the convenience of maintenance and reduces maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the existing structure;

[0013] Figure 2 This is a schematic diagram of the transmission sensing device of an automatic tool changer system for a servo worm gear machining machine tool according to the present invention.

[0014] Figure 3 This is a cross-sectional view of the transmission sensing device of the automatic tool changer system for a servo worm gear machining machine tool according to the present invention.

[0015] Figure 4 This is an exploded view of the transmission sensing device of an automatic tool changer system for a servo worm gear machining machine tool according to the present invention.

[0016] In the diagram: 1. Frame housing; 2. Transmission worm gear mechanism; 3. Transmission worm mechanism; 4. Output shaft assembly; 31. Upper transmission assembly; 32. Lower transmission assembly; 33. Servo motor; 34. Screw; 311. Servo motor mounting plate; 312. Servo motor mounting plate eccentric adjustment block; 313. Upper screw eccentric flange; 314. Upper screw adjusting nut; 315. Oil seal; 316. Bearing; 321. Lower screw eccentric flange; 322. Lower screw adjusting nut; 323. Lower bearing; 5. Encoder. Detailed Implementation

[0017] refer to Figure 1 Traditionally, three sensors and a sensing cam are used to control system actions. The three proximity switches are defined as follows: 1. Brake signal, 2. Tool insertion / retraction signal, 3. Origin signal. The three proximity switches are PNP normally open. The signal wheel has grooves on its surface that cooperate with the three proximity switches to output three sets of signals (010), (001), and (001), where 0 represents off and 1 represents on. The tool change action is: origin (010) tool insertion point (001) tool retraction point (001) origin. Because the tool change action is a 180-degree exchange, the tool insertion point and the tool retraction point are at the same position, and the signal points are the same. CNC machine tool systems on the market have fixed tool change programs. By receiving the status of the three switch signals, the tool change command is issued through a fixed I / O port.

[0018] When a traditional automatic tool changer receives the origin signal (010), it indicates that the ATC origin position is normal. When the peripheral machining sends a tool change command, the CNC system will send a tool change command through the I / O port. At this time, the automatic tool changer will perform a tool grabbing action. When it reaches the tool grabbing point, the three switches will send a (001) signal. The system will simultaneously receive a tool grabbing position command (001). After confirming that there is no error, it will send a command through the CNC system I / O to make the automatic tool changer perform the tool change action. When the ATC finishes inserting the tool, it will send a (001) signal again. At this time, the CNC system has confirmed that the tool is in place. The CNC system I / O port will notify the ATC to return to the origin and wait. When the CNC system receives the (010) signal, it means that it has returned to the origin and the tool change action is over. Therefore, the existing system has a slow response time and requires the addition of a cam transmission mechanism, which increases the cost. In addition, the existing bevel gear transmission mode has insufficient braking performance. The rapid start and stop of the system relies entirely on electromagnetic braking, so the electromagnetic brake has a large load.

[0019] Reference Figures 2 to 4 This embodiment is a transmission sensing device for an automatic tool changer system of a servo worm gear machining machine tool, including a frame housing 1, a transmission worm gear mechanism 2 disposed in the frame housing, a transmission worm gear mechanism 3 disposed inside the frame housing 1 and meshing with the transmission worm gear mechanism 2, and an output shaft assembly 4 disposed inside the frame housing 1 and driven by the transmission worm gear mechanism 2.

[0020] The transmission worm gear mechanism 3 includes a screw 34, an upper transmission assembly 31 mounted on the upper part of the screw, a lower transmission assembly 32 mounted on the lower part of the screw, and a servo motor 33 that drives the screw to rotate.

[0021] The upper transmission assembly 31 includes a servo motor mounting plate 311 for drive installation, a servo motor mounting plate eccentric adjustment block 312, an upper screw eccentric flange 313 connected to the servo motor mounting plate eccentric adjustment block via a nut, an upper screw adjustment nut 314 installed with the upper screw eccentric flange, an oil seal 315 placed inside the servo motor mounting plate, and a bearing 316 sleeved outside the screw.

[0022] To ensure its sealing performance, a sealing ring is also provided outside the upper screw eccentric flange 313;

[0023] The lower transmission assembly 32 includes a lower screw eccentric flange 321 placed inside the frame housing 1, an oil seal placed inside the lower screw eccentric flange, a lower screw adjusting nut 322 installed in conjunction with the lower screw eccentric flange, and a lower bearing 323 placed inside the lower screw adjusting nut and sleeved on the screw; to ensure sealing, sealing rings are sleeved on the lower screw eccentric flange 321 and the lower screw adjusting nut 322.

[0024] The worm gear of the transmission worm gear mechanism 2 is meshed with the worm.

[0025] The servo motor is fixed to the frame housing via a motor mounting plate. This reinforces the fixation between the motor and the frame housing, ensuring that it will not loosen during rotation.

[0026] Furthermore, a motor center adjustment ring is provided at the front end of the motor. The center position of the motor can be adjusted by the motor center adjustment ring to ensure that it is centered.

[0027] The motor is a servo motor; it adopts a transmission method in which the servo motor connects to a transmission worm gear that drives a worm wheel. The reduction ratio of the worm gear system can be determined by the number of teeth on the worm wheel, which can achieve the speed required for the operation of the automatic tool changer in one step. Since the worm gear transmission is a single transmission, the loss of transmission efficiency is reduced. Furthermore, the accuracy of the automatic tool changer can be increased by adjusting the tooth backlash of the worm gear. Also, since the motor does not require a gearbox, the manufacturing cost is reduced. Using a servo motor as the main transmission source further enhances the accuracy of the system's motion control.

[0028] An encoder 5 and a controller for receiving, transmitting, and controlling data are also installed inside the servo motor. The encoder built into the motor directly transmits the operating data to the controller. After programming, it can completely simulate the functions of the cam and three sensors, transmitting signals to the machine tool control system without discrimination. Therefore, signal problems do not require disassembling the system mechanism; only inspection and resetting on the controller are needed, increasing the convenience of maintenance and reducing maintenance costs. Through the driver's underlying program architecture, the driver can output corresponding signals (010)(001)(001) at designated positions, and will also lead out I / O control docking wires to receive instructions from the CNC system. The internal program controls the automatic tool changer to change the tool, and will output the corresponding position signal when it reaches the correct position. Similarly, when the machine tool system I / O receives the correct position signal, it will continue to execute the tool change action until the tool change is completed. This external servo control logic replaces the traditional control scheme and has more advantages; the driver is external, not affected by system brand and compatibility, and does not require changing the system ladder diagram, thus allowing for batch replacement. The servo motor has 3 times the torque output at the moment of startup, with no action delay. The servo motor is a flexible motor with controllable speed. The servo ATC control logic wiring method is the same as the traditional ATC wiring method, offering easy alternatives. The servo motor offers better stability and sealing, making it suitable for more complex machining environments; dual-channel I / O also allows for the switching between light and heavy tools at controllable speed. The servo motor has better overload protection, better protecting peripheral components from impacts in sudden situations. The external drive facilitates troubleshooting and maintenance in case of tool change failures.

[0029] The advantages of this utility model are as follows: This technical solution adopts worm gear transmission, which achieves the required reduction ratio in one step, providing good braking performance and high precision. By using a servo motor as the main power source, the servo motor transmission can adjust the speed within the motor's allowable range, setting acceleration for starting and deceleration for stopping, making the system operation smoother and more effective in protecting the mechanical parts, thus extending the system's service life. At the same time, the encoder built into the motor directly transmits the operating data to the controller. After programming, it can completely simulate the functions of the cam and three sensors, transmitting signals to the machine tool control system without discrimination. Therefore, signal problems do not require disassembling the system mechanism; only inspection and resetting on the controller are needed, increasing the convenience of maintenance and reducing maintenance costs.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A transmission sensing device for a servo worm and gear machine tool tool changer automatic tool changer system comprising a housing frame, characterized in that: The system includes a transmission worm gear mechanism housed in the frame housing, a transmission worm mechanism that passes through the frame housing and meshes with the transmission worm gear mechanism, and an output shaft assembly housed in the frame housing and driven by the transmission worm gear mechanism. The transmission worm mechanism includes a screw, an upper transmission assembly mounted on the upper part of the screw, a lower transmission assembly mounted on the lower part of the screw, and a servo motor that drives the screw to rotate. The servo motor also includes an encoder and a controller for receiving data, transmitting data, and performing control.

2. The transmission sensing device of the automatic tool changer system for a servo worm gear machining machine tool according to claim 1, characterized in that: The upper transmission assembly includes a servo motor mounting plate for drive installation, a servo motor mounting plate eccentric adjustment block, an upper screw eccentric flange connected to the servo motor mounting plate eccentric adjustment block via a nut, an upper screw adjustment nut installed with the upper screw eccentric flange, an oil seal placed inside the servo motor mounting plate, and a bearing sleeved outside the screw. A sealing ring is also provided outside the upper screw eccentric flange.

3. The transmission sensing device of the automatic tool changer system for a servo worm gear machining machine tool according to claim 1, characterized in that: The lower transmission assembly includes a lower screw eccentric flange placed inside the frame housing, an oil seal placed inside the lower screw eccentric flange, a lower screw adjusting nut installed in conjunction with the lower screw eccentric flange, and a lower bearing placed inside the lower screw adjusting nut and sleeved on the screw; both the lower screw eccentric flange and the lower screw adjusting nut are fitted with sealing rings.

4. The transmission sensing device of the automatic tool changer system for a servo worm gear machining machine tool according to claim 1, characterized in that: The servo motor is a servo motor.

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