TW201800885A - Accuracy-designated control method for controller for simple input, automatic adjustment, and time saving - Google Patents

Abstract

The invention provides an accuracy-designated control method for a controller. An online identification and automatic adjusting program is installed in the controller of a tool machine. An man-machine interface of the tool machine is provided with a processing mode selection page that is connected with the online identification and automatic adjusting program. A tool of the tool machine is driven to move, so that data of at least two sections of a path of the tool can be read by the online identification and automatic adjusting program, and conducting advance speed reduction planning for a tangential speed to be distributed to all the axial directions, such that an angular speed difference of each axial direction is smaller than a set allowable speed difference, and the speed of the turning angle is determined by the angular speed difference of all the axial directions. When man-machine interface is switched out of the processing mode selection page, the processing mode selection page is provided with a plurality of digital keys and a parameter adjusting method for simple input, automatic adjustment, and time saving is provided.

Description

Controller precision designation control method

The present invention relates to a method for specifying accuracy of a controller, and more particularly to a method for specifying accuracy of a controller for a controller.

With the development and prosperity of technology, most of the existing machine tools are computer numerical control (CNC), which mainly uses a controller to perform numerical calculations and control. The numerical control unit (NCU) of the controller of the existing machine tools includes There is an interpreter (Interpreter) and an interpolator (Interpolator). The path of the existing machine tool for processing is mainly composed of straight lines (G01) and arcs (G02, G03) as shown in Figure 9, where G01 is Linear cutting, G02 is a circular arc cutting in the clockwise direction, and G03 is a counterclockwise circular arc cutting. In recent years, Computer Aided Design / Computer Aided Manufacturing (CAD / CAM) can be used to provide curved lines. The workpiece contour is established by parameters. The NC unit first reads the NC code (including G code and M code) or the built-in command curve parameter formula through the interpreter, and retrieves the position point, feed rate, or angular velocity, etc. Relevant information is sent to the interpolator, so that the interpolator generates commands to the servo motor of the existing machine tool to drive each axis of the motor within the sampling time by accelerating and decelerating according to the obtained information. Move the working platform or processing head to the set position, where the NC code includes G code and M code, where G codes G00 ~ G99 are the most widely used CNC programming languages. Different G commands represent different functions and will be controlled according to There are differences between different controller brands. The G code can be divided into a single G code and a status G code. The single G code is valid only in the specified block, and the status G code will be valid until the same group. The G code of the group is replaced only after it is set, and the M code contains M00 ~ M99, which can cause the controller to generate ON / OFF control signals. When using it, there cannot be two or more M codes in each block. The last M code is valid.

Therefore, when the existing machine tool is processing, the user must input a control parameter into the controller, and after calculation and control by the numerical control unit of the controller, output a fixed reference input command to the servo motor for driving. Since the controller outputs a fixed reference input command to drive the servo motor, the user must consider accuracy, speed or surface roughness as the input control parameters when inputting control parameters. Adjustment basis, and the user needs to observe whether the output result of the machine tool is consistent with the input control parameter, and then modify the input control parameter through the user ’s experience, and then need to go through multiple inputs and observe the output result. Only the input control parameters of the controller can be adjusted to the required considerations (accuracy, speed or surface roughness, etc.). The use requires not only manual input but also user experience, which greatly improves the adjustment of input control parameters. In view of this, there are actually input controls for existing machine tool controllers. Tuning mode parameter is improvement.

Therefore, the inventors have considered that when the controller of an existing machine tool performs input control parameter adjustment, it needs to perform input manually and depends on the user ’s experience, which greatly improves the lack of time required to adjust the input control parameters and Defect. The present invention has developed a kind of invention which can improve the existing deficiencies after continuous research and experiment.

The purpose of the present invention is to provide a controller precision designation control method, which allows the core to perform processing path calculations in advance through a pre-read interpolation method, which can increase the processing feed speed and shorten the processing time, and can also reduce the number of continuous short lines. The machine vibration caused by the segment acceleration and deceleration achieves the effect of improving the calculation accuracy, allowing the user to input only the quantized value corresponding to the tolerance range of the desired control accuracy, so that the core can refer to the previously set parameters for conversion. In order to obtain the actual setting value for processing, the controller can automatically adjust the relevant parameters of the controller, and at the same time, it has the speed and accuracy, and then provides a simple input, automatic adjustment and time-saving controller precision designation control method.

In order to achieve the above object, the present invention provides a controller precision designation control method, the operation steps of which include the following steps: preparation steps: installing an online identification and automatic adjustment program in the controller of a machine tool, and A machining modal selection page is set in the machine interface, and the machining modal selection page is connected with the online identification automatic adjustment program of the controller; the pre-reading interpolation step: in this operation step, the tool of the machine tool is driven to move , Make the online identification automatic adjustment program located in the controller, read at least two segments of the tool's path data, and perform tangential speed pre-acceleration and deceleration planning before distributing to each axis, the angular velocity difference of each axis Less than a set allowable speed difference to improve the accuracy of the corner part, and the speed at the corner is determined by the angular speed difference of each axis; and the setting step: switch the processing mode setting page on the man-machine interface, the The processing modal setting page provides several numeric keys for users to set according to the processing requirements. Press the corresponding number keys according to the processing requirements.

Further, in the pre-reading interpolation step, when the tool is processing a high-speed arc, the arc feed rate of the tool is set with the centripetal acceleration as a target.

Further, in the pre-reading interpolation step, the travel speed limit value of each path is limited based on the calculated time-averaged speed difference based on the path information, so that the machine tool passes at a low speed when traveling through a path with a high curvature.

Preferably, in the setting step, the value setting range of the number keys is 1 to 10, wherein when the processing requirement is rough machining and fast processing is required, the value of pressing the number keys is 1 or 2 to 5, and When the machining requirement is precision machining or higher precision machining is required, the value of the number button pressed is 10 or 6 ~ 9.

Preferably, in the preparation step, a processing program is started in the man-machine interface of the machine tool, and in the setting step, the instruction format of the processing program to start the processing mode is G05.1Qq Rr, Among them, Qq is the mode setting value of the high-speed and high-precision control function. When q = 0, high-speed and high-precision is turned off, q = 1 is high-speed and high-precision turned on, and q = 2 is high-speed and high-precision control and single-stage smoothing. Rr is High-speed and high-precision control function set the processing condition level setting value. Its setting range is R1 ~ R10, where R1 is the high-speed high-precision control using related parameters with speed priority, and R10 is the high-speed high-precision control using related parameters with priority on accuracy. The relevant parameters of R2 ~ R9 are determined by the ratio of R1 and R10.

By means of the above-mentioned technical means, the precision designation control method of the controller of the present invention, when operating, the user only needs to press the corresponding quantified value such as the tolerance range of the required control precision in the processing mode setting page to correspond to the processing demand. (Rough machining, fine machining, fast machining or slow machining, etc.) digital keys, which allows users to easily select speed and accuracy, and the online adjustment automatic adjustment program in the controller can provide a variable The reference input command is sent to the servo motor, so that the tool can move and process according to the corrected parameters. It is not necessary for the user to observe and modify the input control parameters through experience before the existing machine tool is used. Input control parameters of the controller; further, by setting a processing program to start the processing mode in the man-machine interface of the machine tool, in the setting step, it can be set by the instruction for starting the processing mode of the processing program to choose whether to Perform high-speed and high-precision control, and can perform functions such as G05.1Q0, M02, M30, Reset, and emergency stop , Off-speed high-precision control, thereby providing a simple input, and automatically adjusts the controller to save time specified accuracy control methods.

In order to understand the technical features and practical effects of the present invention in detail, and can be implemented in accordance with the contents of the description, the preferred embodiment shown in the drawings (as shown in Figures 1 and 2) is further described in detail as follows:

The precision designation control method of the controller of the present invention includes the following operation steps, among which:

A. Preparation steps: Install an online identification automatic adjustment program 21 in the controller 20 of a machine tool 10, and set a processing mode selection page 31 and a processing program start in the man-machine interface 30 of the machine tool 10. Processing mode 32, the processing mode selection page 31 is connected to the online identification automatic adjustment program 21 of the controller 20. Further, the machine tool 10 can include: preparation and setting before use and setting of use before use. Among them, the factory will adjust each machine in advance before the machine is completed and leaves the factory. The machine in the factory will first adjust by using Pacemotion, and set the processing related parameters in the parameter page, and when using the settings When the user wants to set the processing mode, according to the actual needs, such as roughing does not require surface accuracy, and can be processed at a faster speed, you can execute instructions on the function screen or in the processing program to set the level The value is selected, and the calculation is performed according to the set value and the related parameters set previously.

B. Pre-reading interpolation step: In this operation step, the tool 12 of the machine tool 10 is driven to move through the servo motor 11 so that the online identification automatic adjustment program 21 located in the controller 20 is read, as shown in FIG. 3 Take at least two pieces of Numerical Control (NC) path data of the tool 12 (N1 and N2, this path does not include movement in the Z-axis direction), as shown in Figures 4 to 6 When assigned to each axis (X and Y axis) after deceleration planning, the geometric relationship between the at least two sections of paths (N1 and N2) is different, so that the paths of the at least two sections (N1 and N2) are in the paths of each axis The discontinuity in speed occurs at the joints. Further, a corner speed difference (ΔVmax) is provided at the joint of the paths in each axial direction, so that the angular speed difference in each axial direction is less than a set allowable speed difference, thereby improving the corner angle. Accuracy, where when the angular speed difference is less than the allowable speed difference, the machining path will be closer to the programmed path. Conversely, when the angular speed difference is greater than the allowable speed difference, the phenomenon may exceed or deviate from the programmed path. The at least two paths (N1 and N2) Angular relationship, by angular speed difference (Δ 𝑉𝑥 and Δ 𝑉𝑦) to determine the speed at which the angle of rotation of angular velocity Vc line such as Equation (1) below: 𝑉𝑐 = min {𝑉𝑐𝑥,𝑉𝑐𝑦} ... ………………………………………… ……………. (1) where Δ 𝑉𝑥 = 𝑉𝑐𝑦𝑠𝑖𝑛𝜃 2− 𝑉𝑐𝑦𝑠𝑖𝑛𝜃 1, Δ 𝑉𝑦 = 𝑉𝑐𝑥𝑐𝑜𝑠𝜃 2 − 𝑉𝑐𝑥𝑐𝑜𝑠𝜃 1.

𝑉𝑎=√𝐴𝑎×𝑟 …………………………………………………………………….(2) 其中Aa 為加速度，𝑟為圓弧路徑之半徑。Further, when the tool 12 performs high-speed arc processing, because the actual tool 12 path will have errors with the command, the higher the centripetal acceleration is, the faster the feed speed will be, and the error of the circle indentation will become larger, so The arc feed speed is set with the centripetal acceleration as the target, wherein the arc feed speed 𝑉𝑎 is shown in equation (2):

𝑉𝑎 = √ 𝐴𝑎 × 𝑟 ………………………………………………………………. (2) where Aa is the acceleration and 𝑟 is the radius of the arc path.

As shown in Figure 7, each horizontal line represents the speed value of the single-stage stroke, and the dots represent the calculated average speed difference as the limit speed limit value of the single-stage stroke, of which some of the single-stage stroke speeds The value is smaller than the speed limit value, because when the single segment is executed through a path with high curvature, it will pass at a lower speed. The average speed difference based on the path information is calculated to limit the travel speed limit value of each path, making the machine tool 10 Passes at a low speed when traveling on a path with high curvature.

C. Setting steps: Please refer to FIG. 8 for reference. The processing mode setting page 31 is switched on the human-machine interface 30. The processing mode setting page 31 provides several numbers for users to set according to processing requirements. Button 311 (the value setting range is 1 ~ 10). When the machining requirement is rough machining and fast machining is needed, press the numeric button 311 value is 1 or 2 ~ 5, and when the machining requirement is finishing machining or higher precision machining is required When pressing the numeric key 311, the value of 10 or 6 ~ 9 is pressed. Further, the command format of the processing mode 32 to start the processing mode is G05.1Qq Rr, where Qq is the mode setting value of the high-speed and high-precision control function. When q = 0 means high speed and high precision are turned off, q = 1 means high speed and high precision is turned on, q = 2 means high speed and high precision control and single-stage smoothing are turned on, and Rr is the processing condition level setting value of the high speed and high precision control function, and its setting range R1 ~ R10, where R1 is high-speed and high-precision control using related parameters with priority on speed, R10 is high-speed and high-precision control using related parameters with priority on accuracy, and related parameters of R2 ~ R9 are determined by the ratio of R1 and R10. Among them, after the high-speed and high-precision control function becomes effective, if G05.1Q0, M02, M30, Reset, emergency stop and other functions are executed, the high-speed and high-precision control function will be canceled. Among them, G05.1Q0 means to turn off the high-speed and high-precision control. Function instructions, M02 means the program ends but stops at the end of the program, M30 means the program ends and returns to the beginning of the program, and Reset means reset.

By means of the above-mentioned technical means, the precision designation control method of the controller of the present invention, during operation, the user only needs to quantify values such as the tolerance range of the required control precision, and press the phase corresponding to the processing demand in the processing mode setting page 31. Corresponding (rough machining, fine machining, fast machining or slow machining, etc.) digital button 311 allows users to easily select speed and accuracy, and automatically adjusts the program 21 automatically through the online identification in the controller 20 Relevant parameters are converted, and a variable reference input command is provided to the servo motor 11 to allow the tool 12 to move and process according to the corrected parameters. It is not necessary for the user to observe and experience through the use of existing machine tools. The input control parameters of the controller can be adjusted after modifying the input control parameters. Further, by setting a processing program to start the processing mode 32 in the man-machine interface of the machine tool, in the setting step, the processing program can be adjusted by Start the processing mode 32 to set the command, so as to choose whether to perform high-speed and high-precision control, and can execute G05.1Q0 When M02, M30, Reset, emergency stop, etc., off-speed high-precision control, thereby providing a simple input, the controller automatically adjusts the time and precision specified saving control method.

The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any person with ordinary knowledge in the technical field may use the present invention without departing from the scope of the technical solution provided by the present invention. Equivalent embodiments of partial changes or modifications made to the technical content disclosed by the invention without departing from the technical solution content of the present invention are still within the scope of the technical solution of the present invention.

10‧‧‧tool machine
11‧‧‧Servo motor
12‧‧‧Tools
20‧‧‧ Controller
21‧‧‧Online identification automatic adjustment program
30‧‧‧Human Machine Interface
31‧‧‧Machining mode selection page
311‧‧‧ number buttons
32‧‧‧ Machining program starts machining mode

FIG. 1 is a block flow chart of a method for controlling accuracy of a controller according to the present invention. FIG. 2 is a block diagram of related devices in a method for designating precision control of a controller of the present invention. FIG. 3 is a schematic diagram of performing a numerical operation on a two-segment path by the precision designation control method of the controller of the present invention. FIG. 4 is a speed-time relationship diagram for the X-axis direction of the precision designation control method of the controller of the present invention. FIG. 5 is a speed-time relationship diagram for the Y-axis of the precision designation control method of the controller of the present invention. FIG. 6 is a diagram showing the relationship between the tangent speed and time of the precision designation control method of the controller of the present invention. FIG. 7 is a schematic diagram of the limit value of the travel speed of each path of the controller of the precision designation control method of the present invention. FIG. 8 is an operation schematic diagram of setting a value by a precision designation control method of a controller of the present invention. FIG. 9 is a schematic block diagram of an operation for inputting control parameters of a conventional machine tool.

Claims (7)

A controller precision designation control method includes the following operation steps: Preparing steps: installing an online identification and automatic adjustment program in a machine tool controller, and setting a processing mode in a man-machine interface of the machine tool Modal selection page, the processing modal selection page is connected to the online identification automatic adjustment program of the controller; pre-reading interpolation step: in this operation step, the tool of the machine tool is driven to move so that it is located in the controller The on-line identification automatic adjustment program reads at least two pieces of path data of the tool, and performs tangential speed pre-acceleration and deceleration planning before distributing to each axis. The angular velocity difference between each axis is less than a set allowable speed difference. , In order to improve the accuracy of the corner part, and the speed at the corner is determined by the angular speed difference of each axis; and the setting step: the processing mode setting page is switched out on the man-machine interface, and the processing mode setting page provides data A number button for users to set according to processing requirements, and press the corresponding number button according to processing requirements. The precision specifying control method of the controller according to claim 1, wherein in the pre-reading interpolation step, when the tool is processing a high-speed arc, the arc feed speed of the tool is set with the centripetal acceleration as the target. The controller precision designation control method as described in claim 1 or 2, wherein in the pre-reading interpolation step, the travel speed limit value of each path is limited based on the calculated average speed difference based on the path information, so that the machine tool can pass through A path with a high curvature passes at a low speed. The method for controlling the accuracy of the controller as described in claim 3, wherein in the setting step, the numerical value setting range of the number keys is 1 to 10, and when the processing requirement is rough machining and fast machining is required, press the number The value of the key is 1 or 2 ~ 5, and when the machining requirement is finishing or more precise machining is required, the value of the number button is 10 or 6 ~ 9. The precision specifying control method of the controller as described in claim 4, wherein in the preparation step, a processing program is started in the man-machine interface of the machine tool, and the processing program is started in the setting step. The modal instruction format is G05.1Qq Rr, where Qq is the mode setting value of the high-speed high-precision control function. When q = 0, high-speed high-precision is turned off, q = 1 is high-speed high-precision, and q = 2 is high-speed high-precision. Fine control and single-stage smoothing function, while Rr is the setting value of the processing condition level of the high-speed and high-precision control function, and its setting range is R1 ~ R10, where R1 is the high-speed high-precision control using related parameters with speed priority and R10 is the use accuracy The priority related parameters are controlled at high speed and high precision, while the related parameters of R2 to R9 are determined by the ratio of R1 and R10. The precision designation control method of the controller as described in claim 1 or 2, wherein in the setting step, the value setting range of the number keys is 1 to 10, where when the processing requirement is rough machining and fast machining is required, The value of pressing the number button is 1 or 2 ~ 5, and when the processing requirement is finishing or higher precision processing is required, the value of pressing the number button is 10 or 6 ~ 9. The method for controlling precision designation of a controller as described in claim 1 or 2, wherein in the preparation step, a processing program is started in a man-machine interface of the machine tool, and in the setting step, the processing program The command format for starting the processing mode is G05.1Qq Rr, where Qq is the mode setting value of the high-speed and high-precision control function. When q = 0, high-speed and high-precision are turned off, q = 1 is high-speed and high-precision turned on, and q = 2 is on. High-speed high-precision control and single-stage smoothing function, and Rr is the processing condition level setting value of the high-speed high-precision control function. Its setting range is R1 ~ R10, where R1 is the high-speed high-precision control using related parameters with speed priority, and R10 is High-precision and high-precision control are performed using related parameters with priority on precision, while the related parameters of R2 to R9 are determined by the ratio of R1 and R10.