KR100315211B1 - A method for controlling the tool path in machine tool - Google Patents

Abstract

In the present invention, when machining a workpiece, roughing processing is performed in the shortest time through manual operation of the operator under the condition that the rough machining limit is set based on the final shape, or only the cutting depth is adjusted stepwise along the optimum machining path. After the roughing process, and finally by providing each method to perform the finishing process through the finishing machining path, relates to a tool path control method of the machine tool to maximize the processing efficiency. Therefore, the method is described as follows.

In a general machine tool, a machining condition setting step of initially setting machining conditions, a roughing limit setting step of setting rough machining limits based on the shape of the final workpiece by inputting CAD data through a computer, and a final finishing operation The finishing machining path input step of setting the finishing machining path to perform the initial input, and the manual roughing machining step for freely roughing by the operator by manual operation up to the roughing limit, and the finishing machining Finishing by a process in the finishing step that automatically carries out machining from roughing limit to final shape data by path;

In addition, the machining condition setting step of initially setting the machining conditions, the roughing limit setting step of setting the rough machining limits based on the shape of the final workpiece by inputting CAD data through a computer, and the finishing machining to perform the final finishing operation Entering a finishing machining path for inputting the initial setting by setting a path, and a roughing machining path input step for setting a roughing machining path to finish a single stroke in the shortest time for a constant cutting depth in a workpiece having the rough machining limit set. And a roughing step of repeatedly performing the roughing machining path by adjusting the cutting depth at the starting position and performing the machining up to the roughing limit, and from the roughing limit to the final shape data by the finishing process path. Finishing the process by finishing process of finishing process automatically It is characterized by a ways.

Description

A method for controlling the tool path in machine tool}

The present invention relates to a machining method of a machine tool, and in more detail, when machining a workpiece, rough machining is performed in the shortest time through manual operation by a worker under conditions in which rough machining limits are set based on a final shape. Alternatively, after roughing by adjusting only the depth of cut along the optimum machining path, and finally providing finishing methods through the finishing machining path, the machine tool can maximize the processing efficiency. It relates to a processing method of.

A general machine tool comprises a machine tool for directly processing a work piece, a control unit for controlling the angular axis servo motor and the main axis servo motor of the machine tool, and a computer that receives CAD / CAM data and sends the same to the control unit.

In particular, the CAD data refers to data representing the shape of the finished product in the design, and the CAM data refers to the path of the tool for obtaining the finished product.

Accordingly, the present invention seeks to obtain an optimum path of a tool in processing a workpiece, and is an improvement of the patent application No. 97-44834 (tool path control method: hereinafter referred to as a conventional invention) filed by the present applicant. .

FIG. 6 is a view for explaining a conventional tool path control method. Hereinafter, a conventional tool path control method will be described.

In a machine tool equipped with a control unit for controlling each servomotor, and a computer connected to the control unit, CAD data confirmation step (301) of inputting CAD data into the computer to determine the final shape in the control unit, and to the control unit A CAM data determination step 302 for setting a tool path that is regularly moved with the final shape based on the final shape of the determined CAD data, and a CAM for inputting the tool path obtained through the determination step of the CAM data into a computer. The process of roughing and finishing machining step 304 to finish roughing and final finishing by manually manipulating the tool cutting depth through a handle or lever based on the data input step 303 and the computer-entered tool path. To complete the machining.

On the other hand, Figure 7 is a schematic diagram showing the workpiece obtained through the tool path control method, for example, when explaining the case of processing the elliptical workpiece as follows.

First, the CAM data that is regularly moved on the elliptical shape, which is the optimal tool path, is determined in the CAD data confirmation step 200 and the CAM data determination step 201 based on the CAD data of the final shape. When only the depth of cut is manipulated, the tool path (A1: CAM data) input to the control unit is always moved to a constant square (ellipse square), so that the tool finishes the final path based on the CAD data and roughing the workpiece. Finishing roughing and finishing step 203 to perform the finishing process.

However, in machining the workpiece through the above method, as roughing and finishing is performed through a constant tool path (CAM data) through a manually adjusted cutting depth, the tool may be out of the workpiece during initial roughing. By moving from the processing efficiency had a problem that is reduced.

Accordingly, the present invention has been invented to solve the above problems, in machining the workpiece, after setting the rough machining limit based on the CAD data of the final shape in the three-dimensional machining, the shortest time through the manual operation of the operator The rough machining is carried out in the final finishing process is performed automatically, the purpose is to provide a processing method to maximize the processing efficiency.

In addition, as roughing is performed by the initial manual operation, it is also intended to reduce the cost of the roughing program.

In addition, by setting the cutting path of the shortest time in the automatic roughing process by adjusting only the cutting depth step by step rough machining is also the purpose of maximizing the machining efficiency.

The present invention for achieving the above object, the step of setting a roughing limit for setting the three-dimensional roughing machining limit in the control unit based on the final shape processing data by inputting the CAM data through a computer. Manual roughing step of performing the rough machining in the fastest time through the manual operation until the rough machining limit. Thereafter, the machining method of the machine tool is characterized by finishing the process in the finishing machining step which automatically performs the machining from the rough machining limit to the final shape by the inputted CAM data.

1 is a block diagram showing a machine tool to which the present invention is applied.

Figure 2 is a process diagram showing a control method according to the invention applied to the machine tool.

3 is a schematic view showing a workpiece in the state in which the machining method of the present invention is applied.

4 and 5 is a schematic view showing a workpiece in a state in which the machining method of the present invention is applied.

6 is a view for explaining a conventional tool path control method.

7 is a schematic view showing a workpiece obtained through the tool path control method.

Explanation of symbols for main parts of the drawings

1: Machine Tool

2: control unit

3: computer

L1, L2: Roughing limit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a machine tool to which the present invention is applied, a machine tool 1 for directly processing a workpiece, and a control unit 2 for controlling the angular axis servomotor and the main axis servomotor of the machine tool 1. And a computer 3 that receives CAD / CAM data and sends it to the control unit 2.

Figure 2 is a process diagram showing a control method according to the present invention applied to the machine tool, the method will be described as follows.

Final shape machining data input step 101 for inputting the CAM data via the computer 3, and roughing limit setting step for setting the three-dimensional rough machining limit L1 in the controller 2 based on the final shape machining data. With 102,

Next, the rough roughing step 103 of which the operator freely performs roughing in the fastest time through the manual operation until the roughing limit L1,

After that, the finishing process by the process of finishing step 104 to automatically perform the machining from the rough machining limit (L1) to the final shape by the initial input CAM data.

In the rough machining step 103, rough machining may be automatically performed. In this automatic rough machining, the machining of one stroke in the shortest time for a constant cutting depth in a workpiece having the rough machining limit L2 is set. The roughing machining path C is set to finish the step, and the roughing machining path C is repeatedly performed as the cutting depth is adjusted step by step at the starting position to perform the machining up to the roughing limit L1. The roughing movement path C has a path of a scanning line.

Therefore, Figure 3 shows a state in which the machining method of the present invention is applied, first input the machining conditions, set the rough machining limit (L1) based on the shape of the final workpiece, and set the final finishing machining path Under the conditions entered; After the operator changes the X, Y, Z axis of the tool through manual operation and performs free roughing up to the rough machining limit L1 in the fastest time; Finishing the workpiece by automatically finishing finishing from roughing limit (L1) to final shape data (CAM data).

4 and 5 also show a state in which the machining method of the present invention is applied, the rough machining to finish the processing of one stroke in the shortest time by adjusting only the cutting depth in the workpiece set the rough machining limit (L2) as described above In a condition in which a path C (see Fig. 5) is set and input; After the roughing machining path (C) is repeatedly performed as the cutting depth is adjusted step by step at the starting position to finish the machining up to the roughing processing limit (L2) (see FIGS. 5A, 5B, and 5C); By the initial input finishing process route to finish the finishing process (see Fig. 5d) by automatically performing the machining from the rough machining limit (L2) to the final shape data (CAM data).

In particular, in the roughing step, when the tool reaches the roughing limit (L2), the machining of the workpiece is stopped, and again the tool is moved along the roughing machining path (C) to the outside of the roughing limit (L2) Machining is performed by operating the tool.

In the present invention as described above, in the machining of the workpiece, after setting the rough machining limit on the basis of the final shape, the rough machining is performed in the shortest time through the manual operation of the operator, the final finishing is automatically As it performs, it will have the effect of maximizing machining efficiency.

In addition, as roughing is performed by the initial manual operation, there is an effect that it is not necessary to write a roughing program.

In addition, it is also effective to maximize the machining efficiency by roughing by adjusting only the cutting depth along the cutting path of the shortest time during automatic roughing.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

Claims (4)

A final shape processing data input step 101 of inputting CAM data via a computer 3, A roughing limit setting step 102 of setting the rough machining limit L1 in three dimensions on the basis of the final shape data; Next, the rough roughing step 103 of which the operator freely performs roughing in the fastest time through the manual operation until the roughing limit L1, Thereafter, the machining method of the machine tool, characterized in that the finishing process in the finishing machining step 104 of automatically performing the machining from the rough machining limit (L1) to the final shape by the initial input CAM data. The method according to claim 1, wherein the roughing step is performed automatically in the roughing step (103). The roughing machining path (C) is set in the automatic roughing process so as to finish the machining of one stroke in the shortest time for a constant cutting depth in the workpiece in which the roughing machining limit (L2) is set. The machining method of a machine tool, characterized in that to perform the machining up to the rough machining limit (L1) by repeatedly performing the rough machining path (C) by adjusting the cutting depth at the position. 4. The method of claim 3, wherein the roughing movement path (C) has a path of a scanning line.