JPS63237840A - Surface machining control device - Google Patents

Abstract

PURPOSE:To prevent a tool from breaking, by measuring respectively a matrix division, divisionally formed on the basis of an input data, while storing in memory the ruggedness distribution of a machining surface and distributively displaying its height being classified by a machining size thus controlling a route of feeding a machining tool. CONSTITUTION:If a machining tool diameter D and workpiece dimensions XA, YA are input from an input 3, the machining original point and a number of machining blocks Xi, Yi are determined, and if a measuring robe 2 is moved, a device measures by an instruction of a CPU1 the ruggedness height H of a machining surface in every divided block of matrix shape to be stored in a memory file 5b. Next, the device, whose arithmetic processing part 6 displays a cutting size of a Z-axis is an output part as the number of cutting times while stores the size in a memory file 5c as the cutting position distribution being classified by the height, controls the route of a machining tool being based on this distribution when a machining program memory 5a is executed. In this way, the device, preventing the machining tool from breaking, enables an overload on a driving motor to be avoided and the efficient machining to be performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for an NC machine tool, and in particular, during surface machining, it measures the undulation state due to unevenness on the machining plane, and controls the surface to be machined in order from the highest peak. It relates to a processing control device.

[Conventional technology]

Conventionally, in N0 surface machining equipment that performs grinding or cutting operations according to a NG program with respect to the relative movement between the tool and the workpiece, no special setup is required even if there are uneven undulations on the workpiece machining surface. Processing was performed uniformly using the same procedure without removing the material. Generally, it is difficult to accurately measure the waviness of the unevenness of the machined surface at the processing site, and the unevenness of the machined surface of the workpiece is ignored and the cutting amount edited and input to the NG Niprogram is used as is. cutting work was being carried out. As mentioned above, at the machining work site, the machining capacity of the machining tool, that is, the depth of cut for one grinding or cutting, is determined by the machining tool. Machining was performed on all machining surfaces in order from the position.

[Problem that the invention seeks to solve]

However, the surface machining process using an NC program, which is performed according to the above procedure, has some points that require improvement.

First, the movement trajectory of the machining tool that is input to the Kani program is the movement of the machining tool in the face of machining, and although the machining movement of the tool is executed even in areas that are not bright, in reality, machining is not performed. It was inefficient. In addition, if you try to perform machining efficiently with one tool movement, there will be a limit to the depth of cut in one time, and in actual grinding or cutting surface machining, it will hit the high part of the convex part in the middle. The machining tools were subject to sudden loads, which caused them to break.

Particularly in the processing of ceramics, etc., such problems have arisen. Second, there is a risk that the main shaft bearing will deteriorate due to repeated overload conditions as described above. Thirdly, work interruptions due to breakage of machining tools due to causes such as overloading have become one of the causes of disrupting the process.

The purpose of the present invention is to solve the above-mentioned problems, prevent damage to machining tools and extend tool life, and also prevent overload on the main shaft bearing to prevent process disruption due to damage to machining tools. The purpose is to deter.

[Means for solving problems]

The means to solve the above problems is to provide an input section for inputting workpiece and processing tool data for the workpiece surface currently being machined in an NC machine tool that performs surface machining, and to create a matrix shape for unevenness on the workpiece surface based on the input data. a calculation processing unit that divides the work surface into a matrix based on the input data and performs calculations on the measured data as a whole, and a matrix distribution by unevenness height and machining size based on the calculation results. data, processing tool depth of cut data.

The present invention is to include a storage means for storing machining origin position data and an output section for displaying the stored data on a screen.

[Effect]

Based on the data input from the input unit by using the above means, the classification measures each of the created matrices, stores the distribution of the undulation state of the unevenness on the upper surface of the machined surface, and calculates the height of the unevenness by processing dimension. Display the distribution on the screen of the output section,
The feed path of the machining tool is controlled according to the distribution situation.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the surface machining control device according to the present invention, which includes a central processing unit (hereinafter referred to as CPU) 1 and a device for measuring the height of the undulation of the irregularities on the machining plane. 2a, an input section 3 such as a keyboard for inputting data such as machining tool dimensions and workpiece dimensions, an output section 4 such as a CRT display for outputting and displaying data, and a non-program memory 5a. It is generally constituted by a storage means 5 that stores various data measured by the measuring means 2, and an arithmetic processing section 6 that collectively performs calculations on the various data.

The measuring means 2 is driven to be movable in three axes, that is, the X-axis, Y-axis, and Z-axis, that is, in three dimensions, and the measuring instrument 2a can accurately measure the height of irregularities on the workpiece plane without contact. Also, the measurement results are A/D converted and stored as measurement data in the storage means 5 or sent to the arithmetic processing section 6. FIG. 4 shows an external perspective view of the device according to this embodiment.
The operating directions of each component below are the X direction and the Y direction shown in the figure.

Define it as the Z direction. The input section 3 is equipped with a keyboard and tape league, and the output section 4 is expandable to include a CRT display as well as other output means.

The storage means 5 includes a machine program memory file 5a that stores a surface machining program, a measurement data memory file 5b that stores data measured by the measurement means 2, a height-based cutting position distribution memory file 5C, and a workpiece shape. It is equipped with a memory file 5d and a positioning memory file 5e for a cutter, which is a processing tool, and FIG.
It is a diagram when displayed on a display. In the figure, (a) shows the position of the highest convex part among the concave and convex parts on the workpiece plane in terms of X, Y, and two-axis coordinates, which are the position coordinates processed in the first cutting process. Similarly, figures (0) and (c) show the position coordinates processed in the second and third cutting operations.

The arithmetic processing unit 6 will be explained in detail with reference to the operating procedure.

FIG. 2 shows the operating procedure of this embodiment, and the operation of this embodiment will be explained below according to the flowchart.

The flowcharts from ■th to ■th are flowcharts showing the measurement procedure and machining preparation procedure. -When processing in the current direction of Y and the rows of X,...Xn (X direction),
Regarding the dimensions of the machining tool to be input, the diameter of the machining tool is input as a value DI in the X-axis direction, and the value D2, which is the diameter minus 02, is input in the Y-axis direction. The diameter of the machining tool to be input may be a published value, and θ2 is a dimension that takes into account the amount of overlapping during cutting.

Next, by inputting the dimensions Xa and Ya of the workpiece,
Determination of ■th machining origin Xo, Yo and ■th machining block number X! , Yl are determined.

When machining in the Y direction, the value D1 is inputted by subtracting θ from D, and the diameter is inputted as the value D+ in the Y-axis direction.

The number of machining blocks X,,Y, is the workpiece surface to be machined on the
It is the number of blocks divided into a matrix on the Y axis,
Measurement of unevenness data, that is, biaxial data, for each of the Xt and X'y'i pieces is performed.

Measurement is started by moving the measurement probe 2a. The measurement probe 2a of the measurement means 2 sweeps the Y axis one step and
By the method of measuring in the axial direction, each block divided into a matrix of X pieces x Y pieces is measured by a CPU command,
The height of the unevenness is measured (■th), and the height dimension HOr HIImK of the unevenness for each block of X1×Y1 is stored in the measurement data memory file 5b of the storage means 5.

The arithmetic processing unit 6 reads the above measurement data and the optimum cutting depth α of the processing tool from the memory file, and calculates the ■th,
The ■th calculation is performed, and the Z-axis cutting dimensions for all blocks of the ■th matrix are displayed on the CRT display of the output unit 4 as the number of cuttings 27, and the number of cuttings from the first to the nth time for all blocks is displayed. Each time, a flag is set on the cutting block and stored in the memory file 5C of the cutting position 1 distribution by height of the storage means 5.

The sample displaying the contents of three pages (Z+, Zz, Z3) of the above-mentioned height-based cutting position distribution memory file 5C is the third sample.
(A), (II) and (C) of the figure.

The machining setup for the workpiece plane to be machined is completed with the above steps,
The height-based cutting position distribution memory file 5C is sequentially referenced during execution of the cutting program memory 5a to perform machining. [Phase]th diameter machining tool has machining origin Xs, Y
o is set, and the Y-axis is machined in one step and the X-axis is machined in the same way as the measurement. 2-th to @-th show the movement order of the machining tool when there is a convex portion requiring a depth of cut α in the first block of the Y-axis and the X-axis. The movement of the machining tool is performed by referring to the data in the height-based cutting position distribution memory file 5C when executing the machine program memory 5a. With rapid traverse, the cutting process is selected as machining feed, making it efficient (
It will be done.

The surface of the workpiece is machined using the above operating procedure, and the workpiece is fed in rapid traverse up to the vicinity of the cutting block, and only the cutting block is fed, so there is no loss in machining speed, and at the same time, it is optimal for the processing tool. Since the amount of cutting can be obtained, there will be no damage to the machining tool.

The present invention is not limited to the above embodiments, but may be applied in practice and may take various embodiments. In this embodiment, cutting is taken as an example, but the present invention is similarly applied to surface machining by grinding, and the measuring means may be performed using a separate dedicated measuring machine.

〔Effect of the invention〕

As explained above, according to the present invention, firstly, the machining tool is not damaged due to mismatched depth of cut, the tool life is extended, and overload on the drive motor of the surface machining control device is prevented. Second, there is no interruption or disturbance in the process due to tool breakage, etc., and the machining time can be set rationally by selecting the feed rate of the tool.

[Brief explanation of the drawing]

- Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 20 is a flow diagram showing the operating procedure of the embodiment, Fig. 3 is a diagram showing the contents of a memory file stored in the storage means; 4
The figure shows an external perspective view of an embodiment of the present invention. Symbols in the figure indicate the following. 1... Central processing bag π 2... Measuring means 2a...
・Measuring instrument 3...Input section 4...Output section
5...Storage means 5a...Cannibal program memory file 5b...Measurement data memory file 5C...Height-based cutting position distribution memory file 6...
Arithmetic processing unit Fig. 3

Claims (1)

[Claims] An NC machine tool for surface machining includes an input unit for inputting workpiece and machining tool data regarding a workpiece surface currently being machined, a measuring means for measuring irregularities of the workpiece surface in a matrix based on the input data, and a measuring means for measuring the irregularities of the workpiece surface in a matrix based on the input data. A calculation processing unit that divides the work surface into a matrix based on the data and performs calculations on the measured data as a whole, and matrix distribution data by unevenness height machining dimension, processing tool depth of cut data, and processing origin based on the calculation results. A surface machining control device comprising: a storage means for storing position data; and an output section for displaying the stored data on a screen.