JPH0134748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting fluid spraying device that controls the direction of a cutting fluid nozzle so as to spray cutting fluid to an optimal position on a cutting tool in a machine tool.

In a machine tool that continuously processes a plurality of tools with different shapes and dimensions while automatically exchanging the tools, it is necessary to supply cutting fluid to the optimal position for each tool. To do this, it is necessary to change the spray direction of the cutting fluid spray nozzle every time the length or diameter of the tool changes. Conventionally, an operator changes the position of the nozzle each time the tool is changed so that the cutting fluid is sprayed at the optimum position. This left a very unreasonable aspect in that a machine tool developed for the purpose of saving labor and manpower still required manual work by the operator.

In an attempt to solve these problems, devices that automatically control the blowing direction of cutting fluid have begun to be proposed. However, in previous proposals, the size of the tool, such as the length, is stored in the control device in advance, and the size of the tool is retrieved from the storage device according to the tool number commanded during machining, and the nozzle blowing direction is determined in the calculation section. The method was to perform calculations and give control commands to the blowout device for control, but there was a problem in that specifying the angle by calculation did not necessarily allow the cutting fluid to be sprayed to the optimal position.

It is an object of the present invention to solve the above-mentioned problems and to provide a cutting fluid spraying device that can be controlled as easily and inexpensively as possible, and that can supply cutting fluid to an optimal position.

The details of the present invention will be explained with reference to embodiments shown in the drawings.

In the figure, a spindle b is provided in a conventional manner at a suitable location on the machine tool, for example at the spindle head a, and a cutting tool c is held on the spindle b. The workpiece d is cut by the rotation and vertical movement of the main shaft b.

A column j is fixed to the spindle head a, and the column j
A rotary actuator h is supported on the rotary actuator h. A cutting fluid nozzle e is fixed to the output shaft of a rotary actuator h. By driving the rotary actuator h, the cutting fluid nozzle e is tilted up and down, and the spraying angle of the cutting fluid changes.

The rotation angle of the output shaft of the rotary actuator h, that is, the tilt angle of the cutting fluid nozzle e, is determined by the angle detector f.
It is extracted as a voltage proportional to the angle.

When the length and diameter of tool c change, workpiece d is changed to tool c
When cutting, the optimal spraying position of the cutting fluid itself changes, and the relative position between the spraying position of the cutting fluid nozzle e and the optimal spraying position also changes, so the spraying direction of the cutting fluid nozzle e, that is, the spraying angle, does not change. This means that the cutting fluid cannot be sprayed at the optimum spraying position. To deal with this, a rotary actuator h is used to change the spray angle of the cutting fluid nozzle. The cutting fluid spraying angle to the optimum spraying position can be fixedly set according to each tool. Therefore, if you select and memorize the spray angle of the cutting fluid nozzle for each tool before starting the automatic continuous machining process,
By using a device that automatically adjusts the angle of the cutting fluid nozzle each time the tool is changed, continuous automatic machining can be carried out without requiring any manual work.

Prior to machining work, the operator can spray cutting fluid at the optimum spraying position of the cutting fluid nozzle for each tool by driving the rotary actuator h using the cutting fluid nozzle rotation switch on the playback operating operation panel p. Move to spray angle.
The spray angle of the selected cutting fluid nozzle is inputted as a voltage signal from an angle detector f, for example, a potentiometer, to an analog-to-digital converter k, converted into a digital signal, and sent to a control section m. In the control unit m, for example, a microcomputer, a digital signal representing the spray angle of the cutting fluid nozzle and a signal representing the tool number commanded by the numerical control device of the machine tool at that time are read, and the data for the commanded tool is read. is stored in memory n as .

Once the data regarding the cutting fluid nozzle is stored for all the tools used, when a tool number command is issued from the numerical control device q of the machine tool during machining work, the command is sent from the memory n in the control unit m. The data corresponding to the cut tool is read out, and compared with the angle signal of the cutting fluid nozzle e inputted through the analog-to-digital converter k at that time. A signal is sent to the motor g that drives the motor g, instructing the rotational direction and rotational drive. The rotation command to the motor g is continued until the angle signal sent through the analog-to-digital converter k due to the rotation of the rotary actuator h matches the data read out from the memory n.
When they match, the rotation command is canceled and the motor g
stops. The cutting fluid spray nozzle is thus automatically adjusted each time the tool changes to the spray angle set for the current tool.

When a pulse motor is used as the drive motor, the position of the nozzle can be directly stored in the memory in terms of the number of pulses, so the angle detector f and the analog-to-digital converter k can be omitted.

The cutting fluid spray nozzle data first entered by the operator is stored in the memory n until the operator manually sends data to change the cutting fluid nozzle's spray angle, and is always at the optimum spray position for each tool. The spray angle of the nozzle that sprays the cutting fluid can be obtained.

When the operator wants to change the spray angle of the cutting fluid nozzle, or when he or she wants to change the tool and store the cutting fluid nozzle spray angle data for the new tool, the operator can change the spray angle of the cutting fluid nozzle from the operation panel p to the drive unit via the control unit m at any time. Send a signal to r and rotate motor g to change the nozzle angle or select a new angle, and store it in memory n in the same way as above, so you can change the spraying angle of the cutting fluid nozzle or use a new tool at any time. Data such as numbers and cutting fluid nozzle spray angles can be stored.

According to the present invention, the spraying angle position of the cutting fluid nozzle is set by driving and controlling the motor using a signal from the control unit based on the signal from the operation panel, for example, a pulse signal, and furthermore, the spraying angle position of the cutting fluid nozzle is set by driving the motor. An analog signal or a pulse signal related to the cutting fluid can be fed back and compared with a target value in the control unit to position the cutting fluid nozzle.

According to the present invention, the nozzle angle is stored together with each tool number using a playback method, so the operator visually sets the nozzle angle to spray the cutting fluid to the optimum position for each tool and stores the data. The nozzle angle can then be adjusted for each tool based on the stored data. According to the present invention, the position of the nozzle can be adjusted using data obtained by actually moving the nozzle,
There is no need to change the program to specify the angle for each tool as in the past, and since it uses a playback method, even if the cutting fluid spray angle conditions for each tool change, the spray angle can be readjusted each time. This can be done during machining operation without changing the machine tool's NC program.

Conventionally, the machining conditions for one tool were set and stored using a playback method, but it was necessary to reset the machining conditions each time the tool was changed.However, in the present invention, the machining conditions for multiple tools can be stored. It has become possible to memorize settings and easily adjust them using signals from a numerical controller.

By using a microcomputer as the control device, a compact and highly reliable device was obtained.

[Brief explanation of drawings]

The figure is an explanatory diagram of an apparatus according to the present invention. a... Spindle head, b... Spindle, c... Cutting tool, d... Workpiece, e... Cutting fluid nozzle, f...
Angle detector, g...Motor, h...Rotary actuator, k...Analog-to-digital converter, m...
...Control unit, n...Memory, p...Operation panel for playback operation, q...Numerical control device.

Claims (1)

[Scope of Claims] 1. A rotary actuator attached to the spindle head of a machine tool, a cutting fluid nozzle attached to the output shaft of the rotary actuator, a motor that rotationally drives the rotary actuator, and the motor and the machine tool. a control unit connected to a numerical control device; a playback operation operation panel and memory connected to the control unit; and a drive unit connected to the control unit and driving and controlling the motor based on signals from the control unit. During the playback operation, the motor is driven by a drive control signal from the control unit based on the signal from the playback operation operation panel to set the position of the cutting fluid nozzle, and the tool number at that time and the position of the cutting fluid nozzle are set by the motor. The cutting fluid nozzle position data based on the signal from the motor is stored in the memory, and during machining, the control unit reads the corresponding data from the memory in response to the tool number command from the numerical control device and performs cutting based on the position signal from the motor. Compare and calculate the current spray angle position data of the liquid nozzle, send the drive control signal obtained by the comparison calculation to the drive unit, drive the motor, and position the cutting fluid nozzle at the memorized spray angle position. A cutting fluid nozzle device for a machine tool, characterized by: