JPH0635092B2 - Numerical control device with tool file - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tool file created by direct keyboard input by a worker or automatic programming when machining is performed based on machining information of an NC machine tool.

<Prior Art> Conventionally, when machining is performed based on machining information of an NC machine tool, NC machining data created by NC tape input, automatic programming, etc., is calculated by a preset sensor installed in the machine and stored in advance. The tool compensation data set and set is calculated each time, and the positions of the tool edge and the work at that time are accurately compensated for machining.

Thus, the NC processing data on the NC device side and the actual current value on the machine side are different from each other.

<Problems to be Solved by the Invention> When the NC machining data described above is used intermittently for machining after the next setup, the previously set tool compensation data corresponds to the tool and the tool file. Since it did not remain in, etc., the tool compensation data had to be input and set again, which was only on an ad hoc basis.

Further, since the tool correction data is set in consideration of the tool mounting dimension as well, there are many cases where the NC data on the NC device side and the actual current value on the machine side are greatly different. When performing turret indexing, interference was likely to occur and could cause a serious accident.

The object of the present invention was proposed in order to solve the problem in view of the above circumstances, and a tool file memory is provided in the NC control device so that the latest tool correction data is left corresponding to the tool. It is to provide a tool file that saves setup labor and solves interference problems.

<Means and Actions for Solving Problems> The present invention is obtained from the difference between the actual measurement value obtained by actually measuring the dimension of the workpiece after machining the workpiece with each tool and the target dimension of the workpiece. An input device that inputs the data of information necessary for machining including the correction value, a measuring device that measures the current position with respect to the machine origin when the tool is moved, and the data of the NC machining program for performing the predetermined machining. The stored NC machining program data memory and the distance between the machine origin and the tool reference point position which is the contact signal output position of the preset sensor provided in the movement range of the tool of the machine tool are set. Tool reference point setting data memory,
Tool reference point setting data stored in the tool reference point setting data memory, and current position data measured by the measuring device when the tool is brought into contact with the preset sensor and a contact signal is output. Is calculated to obtain the mounting dimension of each tool, and the main data including the tool file number of this tool is registered, and the mounting dimension of each tool obtained by the first computing means is calculated. A tool file memory that is stored and a tool layout that is edited from the tool file memory corresponding to the tool attached to the turret surface of the tool post, and the correction value that is input from the input means is stored. Addition of the memory, the attachment dimension of each tool stored in the tool file memory, and the correction value of each tool stored in the tool layout memory Second calculation means for calculating the latest mounting dimensions of each tool, writing processing of the main data to the tool file memory, editing processing from the tool file data to tool layout data, and the tool file data To the tool layout data and the installation size of the tool file memory is rewritten to the latest installation size of each tool obtained by the second computing means, and the correction value of the tool layout memory is reset to 0. It is characterized by comprising a tool data processing program memory in which a program for performing processing is stored, and the installation dimension of the tool file memory is constantly rewritten to the latest installation dimension and stored. Therefore, the mounting dimensions of each new tool obtained by the second computing means are rewritten in the tool file memory, and a reset signal is issued from the tool file memory to the tool layout memory to save the data in the tool layout memory. By resetting the correction value, the history of the mounting dimension of each newest tool always remains in the tool file memory, and the mounting dimension is immediately used at the next setup.

An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) First, the basic principle of the present invention will be described.

The tool file is the tool file N as shown in Fig. 2 (a).
Main data about the tool is registered for each o. That is, in FIG. 2 (A), for example, L is set for each column such as tool file No., process, tool shape ,.
01, outer roughness, outer diameter, the shape of the tool for the outer diameter, the dimension value, etc. are input, the main data about all the tools used in the machine are registered, and when necessary, they are retrieved from the tool file and used. On the other hand, the layout of the tools required for the workpiece to be machined is shown in Fig. 2 (b) by taking out the tool data from the tool file shown in Fig. 2 (a) corresponding to the turret surface No. of the tool post. As described above, the tool layout data is edited. That is, in FIG. 2 (b), the data required for machining is shown in the columns such as turret surface No., tool file No. of the tool attached to the turret surface No., process ... It is extracted from the tool file shown in FIG. 2 (a), edited and processed, and is notified and displayed to the operator.

Further, in order to machine the required dimension of the work with high accuracy, it is necessary to manage the accurate distance between the work and the cutting edge of each tool with respect to the reference coordinates.

FIGS. 2C and 2D are model diagrams showing the positional relationship between the workpiece, the preset sensor, and the tool. In FIGS. 2C and 2D, the workpiece W to be machined is gripped by the chuck C attached to the front surface of the spindle S _p . On the other hand tool T is inserted into the turret head T _h which is attached to the front of the tool rest T _r. The front of the turret head _{T h} and the tool reference point _t, the distance from the tool reference point _t to the cutting edge position and _X t, _{Z t,} the _X t, _{Z t} is the data of the tool mounting dimensions. Further, from the machine origin _M to the preset sensor P
The set distance to _s is Z _Q , X _Q (hereinafter referred to as tool reference point setting data) The distance from the machine origin _M to the tool reference point _t when the tool T is applied to the preset sensor P _s (hereinafter the current position data). Is defined as Z _n , X _n , then Z _t = Z _Q −Z _n , X _t = X _Q −X _n .

Register Z _t is calculated by the formula _above, the tool mounting dimension of X _t into the tool file. Moreover, the tool mounting dimensions determined by the preset sensor P _S is the position of the tool edge tip, resulting in differences between processing dimension of the workpiece, such as the amount of deflection due to the cutting force twice and tool surface roughness of the workpiece and the machining dimensions It is a thing. Further, the tool causes wear of the tool when machining a large number of workpieces, which affects the machining size. Therefore, the difference obtained from the actual measurement value of the machining dimension of the machined workpiece and the target dimension of the workpiece is used as the tool compensation value, and the tool compensation values Z _OF , Z
When _OF is input to the tool layout memory, immediately the tool mounting dimensions of the tool file _{Z t ← Z t + Z OF} , X t ←
Correction calculation is performed as in X _t + X _OF and rewriting is performed. Then, the above-mentioned correction calculation processing is performed for each tool and the latest tool mounting dimension after always using is reset in the tool file memory, and the tool correction value is reset from the tool layout memory to 0. It is designed to support setup.

(2) Next, a specific configuration of the present invention will be described based on the basic principle described above with reference to the configuration control block diagram of FIG.

In FIG. 1, paper tape 2a to paper tape reader 2b
Thus, for example, the data of the NC machining program is input to the CPU 1 via the input / output device 2c and stored in the NC machining program data memory 5.

Further, data relating to information required for processing is input from the keyboard with screen 2d via the input / output device 2c. The turret head T _h which is attached to the front of the tool rest T _r is the tool T, for example, ten inserted, to transmit and receive indexing signal when necessary, be used by being indexed through the interface 3a. As shown in the figure, T ₀₁ , T ₀₂ , ..., T ₀₉ , T ₁₀ are registered as data in the _ten tools T as turret surface numbers. Further, the tool rest _Tr is controlled to move in the X and Z axis directions by an X and Z axis motor 3d through an interpolator, a position control circuit 3b and an amplifier 3c, and the current value is stored in the position register 11.
Send to.

A preset sensor P _s that outputs measurement signals in four directions, that is, X axis plus, minus, and Z axis plus, minus measurement signals is applied to the tool reference _t of the tool T or the turret head T _h to interface. The position data of the current value and the tool reference point setting data are obtained via 4.

As for the preset sensor P _s , the same applicant's Japanese Patent Application No. 58-171627 (Japanese Utility Model Application No. 60-78249).
No.), so the details are omitted.

Main tool data of a tool to be registered in advance is input from the keyboard with screen 2a via the input / output device 2c, processed by the tool data processing program 6 and stored in the tool file memory 8. Tool reference point _t (Fig. 2 (C),
The coordinate values of (d) are set as the set values Z _Q and X _Q as the distance from the machine origin _M , and the values Z _Q and X _Q are measured by the preset sensor P _s , and the tool reference point setting data memory 7
Stored in advance.

Further, the data necessary for the tool T is processed by the tool data processing program stored in the tool data processing program memory 6 as shown in the table of FIG. It is stored in the tool file memory 8.

Based on the tool file shown in FIG. 2 (b), 10 to be inserted into the tool for example a turret head T _h required for processing
A tool of a book is selected by the tool data processing program 6, and the tool is edited for each turret head surface number and stored in the tool layout memory 9.

When the mounting dimension is obtained as the current value of the cutting edge point of the tool T, the preset sensor P _s is operated and the preset sensor P _s is applied to the cutting edge point of the tool T, so that the signal of the preset sensor P _s is AND gate. 10 is opened and the position data X _n , Z stored in the register 11 is opened.
_n passes through the AND gate 10 and is taken into the arithmetic circuit 12. Tool reference point are stored in the tool reference point setting data memory 7 setting data _X Q, _{Z Q} is taken to the arithmetic circuit _{12, X t = X Q -X} n in the arithmetic circuit _{12, Z} t = _Z
Calculation of _Q -Z _n is performed. The respective values X _t and Z _t are taken into the input gate 8a of the tool file memory 8 via the OR gate 13. Further, by loading the data of the tool file No. L corresponding to the turret surface No. from the tool layout memory 9 into the input gate 8a of the tool file memory 8, the tool for each tool file No. of the tool file memory 8 is acquired. _X t of mounting dimensions, _{Z t} column tool mounting dimension _X t of, _{Z t} is input to and stored.

Tool correction, which is the difference between the actual measurement value obtained by actual measurement after performing predetermined machining using the tool T of the tool file No. L01 stored in the tool file memory 8 and the machining dimension target value The values X _OF and Z _OF are input by the keyboard with screen 2d via the input / output device 2c and are taken into the input gate 9a of the tool layout memory 9. Turret surface of the tool layout memory 9 by causing incorporated into the input gate 9a tool file No.L turret face No.T corresponding to tool T indexed by further turret head T _h
No., Tool correction value column corresponding to the tool file No. (2nd
The correction values X _OF and Z _OF of each tool are stored in FIG.
Each correction value X _OF stored in the tool layout memory 9
Z _OF is immediately output gate 9 of tool layout memory 9
It passes through b and is taken into the AND gate 14. When the tool correction value input signal is input to the AND gate 14, the AND gate 14 is opened to allow the correction values X _OF and Z _OF of each tool to pass therethrough and are input to the arithmetic circuit 15. The arithmetic circuit 15 has a tool file N stored in the tool file memory 8.
o. mounting dimensions of the tool corresponding to the X _t, Z _t is the output gate 8
It is taken in through b. In the arithmetic circuit 15, X _t ← X _t
+ X _OF , Z _t ← Z _t + Z _OF is calculated, and X _t and Z _t , which are the mounting dimensions of each new tool, are OR gate 1.
3 through 3, the input gate 8a of the tool file memory 8
Take in. Further, by loading the tool file No. L of each tool into the input gate 8a, a new tool mounting dimension is input in the tool mounting dimension field of the tool file memory 8 and the old data is overwritten with new data and stored. To be done. When the data is rewritten with new data, a reset signal is output from the output gate 8b and is input to the tool layout memory 9 via the input gate 9a of the tool layout memory 9. Turret surface N in the tool layout memory 9
o., the tool compensation value corresponding to the tool file number is reset to 0.

In this way, after each tool T has been used for predetermined machining, the tool correction value is always obtained, and the attachment dimension of each tool T that has been set up to this point is newly set by performing the calculation processing of the tool correction value. The mounting dimensions of each tool T are rewritten in the tool file memory 8 so that the latest accurate mounting dimensions of each tool T are always stored. Also the tool layout
The tool correction value column of the memory 9 is reset to 0 after the installation dimensions are rewritten.

(3) Next, the operation of the present invention will be described with reference to the flowchart of FIG.

When the operation of the present invention is started, the tool reference point setting data X _Q and Z _Q are measured and input by the preset sensor P _s in the second stage and stored in the tool reference point setting data memory 7. Turret head T _h of turret tool post T _r at the 3rd stage
The tools T inserted into the tool, for example, ten tools T in FIG. 1, are applied to the preset sensorn P _s . Current position data X of each tool T at the time of contact with the preset sensor P _{s
n 1} and Z _n are stored in the register 11. When each tool T hits the preset sensor P _s in the second stage, the movement of the tool rest _Tr is automatically stopped (first stage).

The position data X _n , Z _n captured by the signal of the preset sensor P _s at the second stage and the tool reference point setting data X _Q ,
_X t ₌ X by the arithmetic circuit 12 by _{Z Q Q -X n, Z t} =
Calculation of Z _Q -Z _n is performed. When the arithmetic processing is performed in the second stage, the tool mounting dimensions X _t and Z _t are input to the tool file memory 8 and are described in the columns of the respective mounting dimensions in the second stage.

When tool compensation is required from the actual measurement value of the machining dimension of the work in the second stage When the compensation values X _OF and Z _OF of each tool are input to the tool layout memory 9 via the input gate 9a Remember.

In the second stage, the tool file memory 8 outputs the mounting dimensions X _t , Z _t of each tool via the output gate 8 b, and the tool layout memory 9 outputs the correction values X _OF , Z _{OF of} each tool via the output gate 9 b. Are respectively taken into the arithmetic circuit 15, and the arithmetic circuit 15 performs the arithmetic processing of X _t ← X _t + X _OF and X _t ← Z _t + X _OF . The newly corrected mounting dimensions X _t and Z _t calculated in the second stage are input to the tool file memory 8 at the second stage and rewritten in the respective mounting dimension columns of the tool file. When the rewriting of each mounting dimension of the tool file is completed in the second stage, a reset signal is output from the tool file memory 8 to the tool layout memory 9 in the second stage, and each tool correction in the tool layout memory 9 is performed in the second stage. The tool correction values X _O and Z _OF stored in the value column are reset (set to 0).

By performing the above-described cycles from the first stage to the second stage, the attachment dimensions of each tool are always rewritten and stored. Thus, during the next processing or during the setup, this accurate recent mounting dimension can be used immediately.

<Effect> The present invention provides a tool file memory and a tool layout memory in the NC control device, and performs information linkage processing from the tool file memory to the tool layout memory or from the tool layout memory to the tool file memory. Since it can be performed, the tool file stored in the tool file memory serves as a tool index and can cope with the recent changes to FMS, and is indispensable for operator's tool selection and tool management. In other words, it leads to improvement of work efficiency in automation.

In addition, the tool layout stored in the tool layout memory can instruct the turret to set up the tool, and even an unskilled person can handle the machine. Further, according to the present invention, by feeding back the tool compensation value input to the tool layout memory to the mounting dimension stored in the tool file memory, the mounting dimension of the tool is constantly updated to obtain the latest accurate data. . It is registered in the tool file memory as data indicating the exact position of the work and the cutting edge of the tool, and the actual information on the machine side can be obtained. As a result, accurate and latest tool mounting dimensions remain, rather than on-the-spot information, so that the next setup can be dealt with, and interference problems are eliminated at all. As a result, labor saving and setup time can be shortened. Furthermore, it is possible to match the NC device side and the machine tool side.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing the configuration of the present invention. FIG. 2 (A) is a model diagram showing an example of a tool file,
Figure (b) is a model diagram showing an example of the tool layout, 2nd
The figure (c) is a model diagram showing the positional relationship in the Z-axis direction between the workpiece, the preset sensor, and the tool for explaining the basic idea of the present invention, and FIG. 2 (d) is the basic figure of the present invention. It is a model diagram which shows the positional relationship of the workpiece | work, preset sensor, and tool in the Z-axis direction for explaining a way of thinking. FIG. 3 is a flow chart for explaining the operation of the present invention. 1 ... CPU, 2b ... Paper tape reader 2d ... Keyboard with screen 5 ... NC machining program data / memory 6 ... Tool data processing program 7 ... Tool reference point setting data / memory 8 ... Tool file / memory 9 ...... Tool layout memory 12, 15 ・ ・ ・ Arithmetic circuit _Tr・ ・ ・ Turret, T _h・ ・ ・ Turret head P _s・ ・ ・ Preset sensor, T ・ ・ ・ Tool Sp ・ ・ ・ Spindle, C ・ ・ ・ Chuck W …… work

Claims (1)

[Claims] 1. After machining a work piece with each tool, a piece of information necessary for machining including a correction value obtained from a difference between an actually measured value of the dimension of the work piece and a target dimension of the work piece. An input device for inputting data, a measuring device for measuring the current position with respect to the machine origin when the tool is moved, and an NC machining program data memory that stores the data of the NC machining program for performing predetermined machining. And a tool reference point setting data memory in which a distance between a tool reference point position which is a contact signal output position of a preset sensor provided in the tool movement range of the machine tool and the machine origin is set, Tool reference point setting data stored in the reference point setting data memory and the current measured by the measuring device when the tool is brought into contact with the preset sensor and a contact signal is output. First computing means for computing the mounting dimensions of each tool by computing position data, and main data including a tool file number relating to this tool are registered, and for each tool obtained by the first computing means. A tool file memory for storing attachment dimensions and an editing process from the tool file memory corresponding to a tool attached to the turret surface of the tool post, and a correction value input from the input means are stored. Tool layout memory, the installation dimensions of each tool stored in the tool file memory, and the correction value of each tool stored in the tool layout memory are added to the calculation process to install the latest tool. Second calculation means for obtaining dimensions, writing processing of the main data to the tool file memory, tool layout data from the tool file data Editing process to the tool and editing process from the tool file data to the tool layout data, and the mounting size of the tool file memory is rewritten to the latest mounting size of each tool obtained by the second calculating means, and the tool layout is also written. A tool data processing program memory in which a program for resetting the correction value of the memory to 0 is stored, and the installation dimension of the tool file memory is constantly rewritten and stored in the latest installation dimension. A numerical control device having a tool file characterized by the above.