JPH01146662A - Position controlling method for grinding fluid injection nozzle - Google Patents

Abstract

PURPOSE:To enable an injection nozzle to constantly and automatically inject a grinding fluid toward a grinding point to improve the grinding efficiency by positioning and controlling the grinding fluid injection nozzle installed along a contour face being ground toward the grinding point based on specified program. CONSTITUTION:A grinding fluid injection nozzle 6 is rotatably held around an axis of a spindle 7 of a grinding wheel. Based on a program of C axis normal control for moving and controlling the grinding wheel 8 along a grinding contour 14 of a work 13, an angle of rotation required for positioning the grinding fluid injection nozzle 6 installed along the grinding contour 14 close to a grinding point is calculated by a computing unit 11. Based on the calculated value, a C axis servomotor 2 of a nozzle actuator 1 is driven and controlled, the grinding fluid injection nozzle 6 is rotated through gears 3, 4 by a specified angle around an axis of the spindle of the grinding wheel, and the nozzle 6 is constantly positioned toward the grinding point 15. As a result, the grinding fluid can be constantly and automatically injected from the nozzle 6 to the grinding point 15, and the grinding contour 14 of the work 13 is efficiently ground by the grinding wheel 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a grinding fluid injection nozzle suitable for always positioning the grinding fluid injection nozzle near the grinding point when grinding a workpiece by C-axis normal control. The present invention relates to a position control method.

[Conventional technology]

Workpiece 1 consisting of a combination of complicated curves as shown in Figure 4
3a, the grindstone 8 is used to grind the processing contour 14a.
It is necessary to control the movement along the C-axis normal control is adopted as this control method. In the C-axis normal control, a C-axis normal control section is formed in the control device, and the grindstone 8 is automatically positioned according to a pre-programmed command so that it is always positioned in the normal direction of the machining contour 14a. This is widely known as software technology.

On the other hand, the grinding fluid spray nozzle is installed relatively close to the grinding wheel 8 and is designed to spray toward the grinding point, but in the conventional type, the spray direction is constant and the direction cannot be adjusted manually. was common.

[Problem that the invention attempts to solve]

As shown in FIG. 4, the grindstone 8 is sequentially rotated 1. When moving to positions n, m, rv, and v, if the position of the grinding fluid injection nozzle 6a is fixed, for example, at position 1, the grinding fluid injection nozzle 6a is closest to the grinding point 15 (at position 1 (6b)). Even if the grinding fluid injection nozzles 6a and 6b are located near the position shown in FIG.

Therefore, as described above, it is necessary to manually move the grinding fluid injection nozzle 6a to the vicinity of the position 6b, which causes an extremely complicated problem. In addition, in order to automatically control the grinding fluid injection nozzle 6a according to the machining contour 14a, it is necessary to create a control program for this in the control device, which is extremely complicated, and the control program for the grinding fluid injection nozzle must be created accurately. There was a problem that it was very difficult to do so.

The present invention solves the above-mentioned problems. It eliminates the control program only for controlling the movement of the grinding fluid injection nozzle, simplifies the control system, and automatically and accurately keeps the grinding fluid injection nozzle close to the grinding point at all times. It is an object of the present invention to provide a position control method for a grinding fluid injection nozzle that can improve the positioning and grinding efficiency.

[Means for solving problems]

For this purpose, the present invention is capable of grinding in which the C-axis line control program that controls the movement of the grinding wheel along the machining contour is changed to control the positioning of the grinding fluid injection nozzle located around the grinding wheel toward the grinding point. The present invention is characterized by a method of controlling the position of a liquid injection nozzle.

[Effect]

A C-axis line control program for controlling the movement of the grinding wheel along the machining contour is input into the control device in advance. The relative positional relationship between the grinding wheel and the grinding fluid injection nozzle is known;
The position to which the grinding fluid injection nozzle should be moved to approach the grinding point is calculated relatively inexpensively based on C-axis line control. A program based on this calculation enables desired positioning control by moving the grinding fluid injection nozzle in synchronization with the movement of the grinding wheel.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, the grinding fluid injection nozzle 6 is attached to a spindle 7 that holds a grindstone 8, and is arranged to be rotatable around the axis of the grindstone by a nozzle actuator 1, which will be described later. The movement of the nozzle actuator l is controlled by a control device 9.

The control device 9 includes a C-axis line control section 10, a rotation angle calculation section 11, and the like. The C-axis line control unit 10 moves the grindstone 8 along the machining contour 14 (shown in FIG. 3) of the workpiece 13, and controls the spindle C-axis according to commands programmed in advance based on the machining contour 14. The grindstone 8 is moved to a predetermined position via a mechanism 12 (details omitted). The rotation angle calculation unit 11 determines the movement position of the grinding fluid injection nozzle 6 based on a program for controlling the C-axis line of the grindstone 8, and in this embodiment, it is formed by software so that the rotation angle is calculated. The nozzle actuator 1 is automatically controlled by a command based on this calculation result.

An embodiment of the nozzle actuator 1 is shown in FIG.

A gear 4 is rotatably supported on the spindle 7.
A gear 3 connected to a C-axis servo motor 2 meshes with the gear.

The grinding fluid injection nozzle 6 is fixed to the gear 4 and rotatably supported around the axis of the spindle 7 via the support plate 5, with its tip facing the grinding wheel 8 and spraying the grinding fluid to the grinding point 15. arranged to spray. By inputting a desired rotation angle command to the C-axis servo motor by the rotation angle calculation unit 11 of the control device 9, the grinding fluid injection nozzle 6 is rotated by a predetermined rotation angle via the gears 3 and 4.

Next, the operation of this embodiment will be explained in more detail.

As shown in FIG. 3, the grinding wheel 8 is
move from position A to position B along

As mentioned above, the grindstone 8 is controlled by the C-axis line, so it is always automatically positioned in the normal direction of the machining contour 14. Grindstone 8
Grinding fluid injection nozzle 6 when is in position A and position B
The desired positions of the grinding wheel 8 are required to be at positions A' and B', and these positions are related to the movement position of the grinding wheel 8,
It can be calculated relatively easily based on the grindstone C-axis line control program. Therefore, by forming in advance in the control device 9 an arithmetic circuit that determines the position of the grinding fluid injection nozzle 6 based on the C-axis normal control program, the movement circuit angle of the grinding fluid injection nozzle 6 can be automatically determined. As a result, it looks like the illustration! It becomes possible to position the grinding fluid injection nozzle 6 at fA' and B'.

As described above, the grinding fluid injection nozzle 6 can be positioned based on the C-axis line control program of the grindstone 8 necessary for processing the workpiece 13.

There is no need to create a new special program, and automatic control can be achieved by simply forming a relatively simple arithmetic circuit as described above. Of course, if the shape of the workpiece 13 changes, a program for the grinding fluid injection nozzle 6 will be automatically created in response to the change. The injection processing efficiency can be improved.

Although the structure of the nozzle actuator 1 in this embodiment is as shown in FIG. 2, it is of course not limited to this structure, nor is the number of grinding fluid injection nozzles 6 limited to that in the embodiment.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the grinding fluid can always be automatically injected toward the grinding point regardless of the machining contour shape, and the grinding efficiency can be improved. The effect of automatic positioning control can be achieved using a relatively simple control method.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a partial front view illustrating the structure of a nozzle actuator of the embodiment, and FIG.
FIG. 4 is an explanatory diagram for explaining the operation of the embodiment, and FIG. 4 is an explanatory diagram for explaining a conventional position control method of a grinding fluid injection nozzle. DESCRIPTION OF SYMBOLS 1... Nozzle actuator, 2... C-axis servo motor, 3, 4... Gear, 5... Support plate, 6.6a.
...Grinding fluid injection nozzle, 7...Spindle, 8...
Grindstone, 9...control device. 10...C-phase normal control section, 11...Rotation angle calculation section,
12... Main spindle C-axis control mechanism, 13, 13a... Workpiece, 14, 14a... Machining contour, 15... Grinding point.

Claims (1)

[Claims] 1. Based on a C-axis normal control program that controls the movement of the grinding wheel along the processing contour, a grinding fluid injection nozzle installed along the processing contour surface of the grinding wheel is set at the grinding point. A method for controlling the position of a grinding fluid injection nozzle, the method comprising controlling the position of a grinding fluid injection nozzle. 2. A grinding liquid injection nozzle is rotatably supported around the axis of a grinding wheel shaft, and the grinding liquid injection nozzle is ground based on a C-axis normal control program that controls the movement of the grinding wheel along the machining contour. The position of the grinding fluid injection nozzle according to claim 1, wherein the rotation angle necessary for positioning in the vicinity of the point is calculated, and the rotational position of the grinding liquid injection nozzle is determined based on the calculated value. Control method.