JPS63200943A - Simultaneous machining method in numerically controlled lathe and device thereof - Google Patents

Abstract

PURPOSE:To make programming work so easy, by controlling a first tool with the program stored in a first memory means, and a second tool with the operational result added of finishing allowance by an arithmetic unit, respectively at the same time. CONSTITUTION:When a workpiece 1 is machined simultaneously by a finishing cutting tool 21 and a roughing cutting tool 23, a finishing program is inputted into a numerical control system, and a finishing size (diameter) x is added to a first memory device 41, furthermore the finishing size (x) stored in an arithmetic unit 42 and the inputted finishing allowance (a) are added together, finding a roughing size (y), and it is stored in a second memory device 43. With this constitution, the finishing cutting tool 21 is moved in an X direction and positioned so as to become the specified finishing diameter (x) as well as the roughing cutting tool 23 is moved in a Y direction and positioned so as to become the specified diameter y=x+a, respectively, whereby roughing and finishing of the workpiece 1 are carried out at the same time. Thus, programming becomes easy, while possibility of occurrence of the composition miss is also reducible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a processing method using a numerically controlled lathe, and in particular,
The present invention relates to a simultaneous machining method and an apparatus for the simultaneous machining, which can easily create a program for simultaneously performing rough machining and finishing machining using a plurality of cutting tools.

[Conventional technology]

In a numerically controlled lathe that has a guide bushing and is capable of heavy cutting by cutting at the mouth of the guide bushing, finishing machining can be done in one operation in order to cut at the mouth of the guide bushing. It is characterized by the ability to reduce processing time. This type of numerically controlled lathe is capable of heavy cutting and reduces machining time, so recently it has become necessary to machine workpieces with increasingly larger diameters, and in some cases, it is possible to finish them in one machining process. It has become increasingly difficult to perform machining, and it has become increasingly necessary to use two or more cutting tools at the same time. In this case, of course, the movement path of the first tool that performs finishing machining and the movement path of the second tool that performs rough machining are separate programs, and conventionally, each program had to be input individually. did not become.

However, inputting each program individually in this way takes a considerable amount of time, and furthermore, the number of program input errors increases accordingly.

The present invention aims to eliminate these drawbacks and improve the machine so that rough machining can be performed at the same time by simply inputting a finishing machining program.

[Means for solving problems]

The present invention is intended to solve these problems, and is a processing method for simultaneously performing rough machining and finishing machining using a plurality of cutting tools in a numerically controlled lathe. By controlling the position of the tool, other tools that perform simultaneous machining are automatically controlled to the rough machining position with a smaller depth of cut by an arbitrarily given finishing allowance a, and the cutting edge of the one tool that performs finishing This is a simultaneous machining method in a numerically controlled lathe in which by programming only the position, the other tools are automatically controlled to the rough machining position that leaves only a finishing allowance a. a numerically controlled lathe having a second tool for performing rough machining, a first storage means for storing a programmed movement path of the first tool, and a movement of the programmed first tool. and an arithmetic device that adds a finishing allowance a arbitrarily given to the path, and the first tool is controlled by the program stored in the first storage means, and the first tool is added to the finishing allowance a given by the arithmetic device. This problem was solved by controlling two tools simultaneously.

〔Example〕

Hereinafter, the present invention will be explained based on the drawings.

Fig. 1 is a front view showing one embodiment of a numerically controlled lathe suitable for the processing method of the present invention, Fig. 2 is a front view showing the state of the cutting tool during simultaneous processing, and Fig. 3 shows cylindrical cutting. Side view,
Figure 4 is a side view showing taper cutting, Figure 5 is a side view showing spherical cutting, and Figure 6 is the numerical side? ! FIG. 1 is a block diagram of a portion added to the L device.

In FIG. 1, a workpiece 1 is held and rotated by a main shaft (not shown), and is movable in the direction of the main shaft axis together with a headstock supporting the main shaft. 2 is a column that supports the tool rest 3 and is fixed to the bed 4;
A guide bushier 5 that rotatably supports the workpiece 1 is provided on the center line of the main shaft.

On the tool rest 3, a plurality of tool holders 11, 12, 13, 14, and 15 are arranged radially in a radial manner, each holding a tool 21, 22, 23, 24, and 25. 11 to 15 are servo motors 3, respectively.
1, 32, 33, 34, and 35 so as to be movable toward the center line of the main shaft. Then, the workpieces 21 to 21 are moved by the movement of the headstock in the direction of the spindle axis and the servo motors 31 to 35.
25 is controlled by a numerical control device (not shown).
is driven, and the axial movement of this main shaft and the cutting tools 21 to 25
A desired cutting process is performed by the numerically controlled lathe by moving forward and backward.

Here, as shown in Fig. 2, the finishing machining tool 2
1 and the rough cutting tool 23, move the finishing tool 21 in the X direction and position it to a predetermined finishing diameter By moving the cutting tool 23 in the Y direction and positioning it to a predetermined finishing diameter y-x+a (here, a is a predetermined finishing allowance), and moving the workpiece l relatively in the axial direction. Process.

In reality, the finishing machining tool 21 and the rough machining tool 24 have a predetermined offset amount of 9 as shown in FIG.
For workpiece 1, the position of the cutting tool is set so that rough machining is first performed and then finishing machining is performed.

In the conventional method, when creating a program, the movement in the X-axis direction (the axial direction of the workpiece) is used as a parameter, and the cutting tool for finishing machining in the X-axis direction (the moving direction of the cutting tool 21 for finishing machining) is set as a parameter. A program is created in which the position of the cutting edge of the cutting tool 21 is specified as X, and the cutting edge position of the cutting tool 24 for rough processing in the Y-axis direction (the moving direction of the cutting tool 24 for rough processing) is specified as y.

In this case, the program creator determines the difference between the material diameter d and the finished dimension Calculate the rough machining dimension y by adding the finishing allowance a,
After confirming that this is an appropriate machining allowance for the material diameter d, enter the finishing dimension .

On the other hand, according to the present invention, after determining the difference between the material diameter d and the finished dimension X and confirming that rough machining and finishing machining are required, the predetermined finishing dimension Bit 21 used and bit 2 used for rough machining
All you have to do is write 3 into the program.

In this processing example, the processing of the end face and the processing of the relief portion and the piece are performed in other steps using another cutting tool for end face processing, which is not disclosed, as in the prior art.

In this case, as shown in FIG. 6, the first storage means 41 stores a predetermined finishing dimension X in the numerical control device, and the rough machining dimension y is determined by the predetermined finishing dimension This can be realized by providing an arithmetic unit 42 that performs calculations and a second storage means 43 that stores the results of this calculation.

FIG. 4 shows an example of tapering processing using the processing method of the present invention. As in the case of FIG. 3, the cutting tool 23 for rough processing the workpiece l and the cutting tool 21 for finishing processing the workpiece l are
Only the movement path of the cutting tool 21, which is installed with an offset of S and is similarly used for finishing, is programmed and stored in the first storage means 41, and a predetermined finishing allowance a is stored in the first storage means 41.
are added by the arithmetic unit 42 and the result of the arithmetic operation is stored in the second storage means 43. Simultaneous machining is performed by moving the tool bits 23.21 for rough machining and finish machining according to the tool movement paths stored in the first and second storage means 41.43.

Figure 5 shows the case of machining a spherical surface, but Figures 3 and 4
Since it is exactly the same as the embodiment shown in the figure, detailed explanation will be omitted.

In the above explanation, only the machining method was explained, but as is clear from the above explanation, the apparatus for this machining method is such that the numerical control device controls the predetermined finishing dimension X or the movement of the tool for finishing machining. The rough machining dimension y or the tool travel path for rough machining is determined by the first storage means 41 that stores the path, the predetermined finishing dimension X or the movement path of the tool for finishing machining, and the finishing allowance a. It is clear that this can be implemented by providing an arithmetic device 42 that calculates , and a second storage means 43 that stores the result of this calculation.

Note that the second storage means 43 can be omitted if the dimension y for rough machining or the movement path of the tool for rough machining is calculated at the same time as machining.

〔Effect of the invention〕

As described above, in the present invention, it is only necessary to specify a program for specifying a predetermined finishing dimension This has the great effect of reducing the possibility of production errors.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a numerically controlled lathe suitable for the processing method of the present invention, Fig. 2 is a front view showing the state of the cutting tool during simultaneous processing, and Fig. 3 is a side view showing cylindrical cutting. Figure, 4th
5 is a side view showing taper cutting, FIG. 5 is a side view showing spherical cutting, and FIG. 6 is a block diagram of a portion added to the numerical control device. DESCRIPTION OF SYMBOLS 1...Workpiece, 11-15...Bite holder, 21-25...Bite, 41...First storage means, 42...Arithmetic unit, 43...Second Memory means. Figure 3 Figure 4 Figure 6 Figure 1J

Claims (2)

[Claims] (1) A processing method for simultaneously performing rough machining and finishing machining using multiple cutting tools on a numerically controlled lathe, the method comprising:
By controlling the position of one tool that performs finishing machining, other tools that perform simultaneous machining are automatically controlled to rough machining positions with a smaller depth of cut by an arbitrarily given finishing allowance a, and finish machining is performed. By programming only the position of the cutting edge of one tool, other tools can also be adjusted to the finishing allowance a.
A method for simultaneous machining in a numerically controlled lathe, characterized in that the rough machining position is automatically controlled to leave only the remaining rough machining positions. (2) In a numerically controlled lathe having a first tool that performs finishing machining and a second tool that performs rough machining, a first storage means that stores a programmed movement path of the first tool; an arithmetic device that adds an arbitrarily given finishing allowance a to the programmed movement path of the first tool;
The first tool is controlled by the program stored in the first storage means,
A device for simultaneous machining in a numerically controlled lathe, characterized in that a second tool is simultaneously controlled based on a calculation result obtained by adding a finishing allowance a by a calculation device.