KR101498303B1 - Appratus and Method for Controlling Rigid Tapping Retract - Google Patents

Abstract

The present invention relates to a rigid tapping return control apparatus using a CNC apparatus having a spindle drive unit 210 for rotating a workpiece and a shaft feed drive unit 220 for axially feeding a machining tool, An abnormality check unit 120 for checking whether an abnormality has occurred during the rigid tapping process, a spindle for which machining has been stopped, A data processing unit 130 for calculating the number of spindle rotations and the axial feed distance necessary for detecting the axial position of the spindle and returning to the initial position, The spindle is rotated in the opposite direction and the machining tool is axially transported in the opposite direction to automatically move the spindle and the machining tool to the initial position And a return control unit 140 to return to.

Rigid tapping, return, spindle, feed, Z-axis, alarm

Description

TECHNICAL FIELD [0001] The present invention relates to a rigid tapping return control apparatus and a rigid tapping return control apparatus,

The present invention relates to a rigid tapping process, and more particularly, to a process for rigid tapping, in which a machining tool and a workpiece are stuck in a state of equipment failure and power off, To a device that can move back to the original point at an initial rotational speed.

Rigid tapping is one of the tapping methods. It is a method of tapping at high speed by synchronizing the spindle spindle rotation and axial direction transfer.

Rigid tapping can be used in equipment that can control the spindle position like a CNC machine and synchronize the spindle rotation and axis feed of the main spindle.

In the rigid tapping cycle of the CNC, the axial (Z-axis) transmission amount of the transmission shaft per rotation of the main spindle is set to be equal to the pitch (lead) of the screw of the tab.

Rigid tapping has the advantage that the tapping time is saved and the tab holder is unnecessary.

On the other hand, in the case of rigid tapping, it may be a problem that the operation of the processing equipment is unexpectedly stopped due to the defect of the equipment or the power off while the processing tool is embedded in the material during the processing.

In other words, since the tool is stopped in the state where the tool is embedded in the workpiece, the work efficiency deteriorates and the fatigue of the worker is increased by detaching the manually inserted tool from the workpiece.

These problems can occur frequently in workplaces where power supply is poor, especially in India and China.
(Prior art document)
(Patent Literature) Japanese Laid-Open Patent Publication No. 11-077484 (Mar. 23, 1999)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for manufacturing a rigid tapping machine, So as to be able to move to the first point inversely at the rotational speed of the motor.

In order to solve the above-described problems, the present invention proposes a rigid tapping return control apparatus using a CNC apparatus having a spindle drive unit 210 for rotating a workpiece and a shaft feed drive unit 220 for axially feeding the tool. do.

The apparatus according to the present invention includes a position determining unit 110 for determining an axial position of a spindle and a machining tool before or during a rigid tapping process and an abnormality check unit 110 for checking whether an abnormality has occurred during the rigid tapping process, And an axial position of the spindle and the machining tool in the abnormality occurrence state detected by the positioning unit 110 and the initial position of the spindle and the machining tool before the rigid tapping process, A data processing unit 130 for calculating the number of spindle revolutions and an axial directional feed distance, and a control unit 130 for rotating the main spindle in the opposite direction by a rotation number and a feed distance calculated by the data processing unit 130, And a return control unit (140) for automatically returning the spindle and the machining tool to an initial position.

The apparatus may further include an input / output unit 300 provided with an alarm display unit 330 for displaying the machining stop state during the rigid tapping operation by the abnormality check unit 120.

According to another aspect of the present invention, a rigid tapping return control method using a CNC apparatus having a spindle driving unit 210 for rotating a workpiece and an axis feed driving unit 220 for axially moving a working tool is proposed.

A control method according to the present invention includes the steps of: (A) storing an initial axial position of a spindle and a machining tool before rigid tapping; (B) checking whether an abnormality has occurred during rigid tapping; (C) calculating a spindle revolution number and an axial feed distance necessary for returning to the initial position stored in the step (A) by detecting the axial position of the spindle and the machining tool in the stopped state, and ) Rotating the spindle spindle in the opposite direction by the number of rotations and the travel distance calculated in the step (C), and automatically returning the spindle and the machining tool to the initial position by axially moving the machining tool in the opposite direction .

As described above, according to the present invention, when rigid tapping is performed and equipment is turned off and the power is turned off, You can move.

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

1 is a block diagram of a rigid tapping retract control apparatus according to the present invention.

As shown in the figure, the rigid tapping return control apparatus according to the present invention includes a control unit 100, a driving unit 200, and an input / output unit 300.

The control unit 100 includes a position determination unit 110, a data processing unit 120, an abnormality check unit 130, and a return control unit 140.

The position determination unit 110 grasps the axial position of the spindle and the tool before or during the rigid tapping process. Although not shown, a predetermined storage means may be provided to store the detected axial position of the spindle and the machining tool in real time.

The abnormality check unit 120 checks whether abnormality occurs during the rigid tapping process. Abnormalities occur when the power supply is suddenly disconnected due to a power failure or an accident. In addition, there may be cases where foreign substances are input to the processing tool.

The criteria for the occurrence of anomalies can be set in various ways. For example, the case where the spindle or the tool axis transfer speed drops below a predetermined level may be set as an abnormal occurrence, but the present invention is not limited to this, and various methods can be employed.

The data processing unit 130 detects the axial position of the spindle and the machining tool in the machining stopped state and calculates the spindle rotational speed and the axial machining distance necessary for returning to the initial position.

The return control unit 140 rotates the spindle spindle in the opposite direction by the rotation speed and the transfer distance calculated by the data processing unit 130 and returns the spindle and the machining tool to the initial position by axially moving the machining tool in the opposite direction .

Next, the driving unit 200 performs a spindle or axis feed according to a control signal of the controller 100, and includes a spindle driving unit 210 for spindle rotation, a shaft (not shown) And a transfer drive unit 220.

The input / output unit 300 is configured to allow the user to input and output predetermined data to / from the controller 100 or the driver 200. The input / output unit 300 includes a rigid tapping switch 310, a return tapping return switch 320, , And an alarm display unit 330.

The rigid tapping switch 310 is a switch capable of instructing to perform rigid tapping, and the return tapping return switch 320 is a means for instructing a Rigid Tapping Retract function when an abnormality occurs during rigid tapping processing , And the alarm display unit 330 is a means for notifying the occurrence of an abnormality during rigid tapping processing. Various methods such as lamps and alarms can be used for the alarm display.

The rigid tapping control method of the present invention will be described with reference to the flow charts of Figs.

First, the entire process of the control method will be schematically described with reference to the flowchart of FIG.

First, the axial initial positions of the spindle and the machining tool before rigid tapping are stored (S 1).

Then, it is checked whether an abnormality has occurred during the rigid tapping (S 2).

As a result of the check, if the machining is stopped and the axial position of the machining tool is detected, the spindle revolution number required for returning to the initial position stored in the step S 1, The distance is calculated (S 3).

When the calculation is completed, the spindle spindle is rotated in the opposite direction by the rotation number and the feed distance calculated in the step S 3, and the spindle and the tool are automatically moved to the initial position stored in the step S 1, (S 4).

The above process will be described in more detail with reference to the flowchart of FIG.

When the user turns on the rigid tapping switch 310 of the input / output unit 300 to drive the rigid tapping function (S 10), the position determination unit 110 of the control unit 100 controls the spindles before the rigid tapping process and the axes Direction initial position (S 20).

The abnormality check unit 130 of the control unit 100 determines whether an abnormality has occurred (S30). The abnormal conditions can be determined as an occurrence of an abnormality in which the operation of the equipment is stopped in the state where the processing tool is embedded in the material due to a power failure or the like during the rigid tapping process or the operation is not performed at the designated rotation speed and the feed rate.

If it is determined that an abnormality has occurred, the abnormality check unit 130 returns to the MACHINE READY state of the machine, which is a condition in which the Z axis and the spindle can move (S40).

When the alarm display unit 330 is provided in the input / output unit 300, the abnormality check unit 130 sends a control signal to the alarm display unit 330 of the input / output unit 300, Lamp, warning sound, etc.) to indicate the occurrence of an error.

After the machine is in the machine ready state, the user turns on the rigid tapping return switch 320 of the input / output unit 300 (S50). The rigid tapping return command may be input by the user or may be automatically performed by the abnormality check unit 130 of the control unit 100. [

When the rigid tapping return instruction is applied, the data processing unit 120 of the control unit 100 detects the axial position of the spindle and the machining tool in the machining stopped state and determines the spindle rotation number required for returning to the initial position, The feed distance is calculated (S60).

The return control section 140 of the control section 100 sends a control signal to the spindle drive section 210 to reverse the spindle spindle by the calculated number of rotations (CCW in the case of CW, and the opposite case in the opposite case) (S 70), and also sends a control signal to the axis feed drive section 220 to feed the machining tool in the reverse direction by the axis feed drive section 220 by the calculated feed distance (For example, Z axis) (S 80).

Next, it is checked whether the spindle and the machining tool have returned to the initial position by the position determination unit 110 (S90). If the spindle and the machining tool return to the initial position, the apparatus is activated (S100).

When the initial position return is completed, the alarm display unit 330 of the input / output unit 300 may be used to notify the user of completion of the return as a predetermined indication (lamp, warning sound, etc.).

Although specific embodiments of the present invention have been described above, it should be understood that the spirit and scope of the present invention is not limited to these specific embodiments, but various modifications and variations may be made without departing from the scope of the present invention. It will be understood by those of ordinary skill in the art to which the present invention belongs.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

1 is a block diagram of a rigid tapping return control device of the present invention.

FIG. 2 and FIG. 3 are flowcharts for explaining a method of controlling a rigid tapping return control according to the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

100: control device 110:

120: data processing unit 130: abnormality check unit

140: return control unit 200:

210: spindle driving part 220:

300: input / output unit 310: rigid tapping switch

320: Rigid tapping return switch 330: Alarm display

Claims (3)

A rigid tapping return control apparatus using a CNC apparatus having a spindle drive unit (210) for rotating a workpiece and an axis feed drive unit (220) for axially feeding the tool, A position determination unit 110 for determining the axial position of the spindle and the machining tool before or during the rigid tapping process, An abnormality check unit 130 for checking whether power supply to the spindle driving unit 210 or the axis feed driving unit 220 is stopped during the rigid tapping process, It is necessary to grasp the axial position of the spindle and the machining tool in the abnormal state detected by the position detecting unit 110, the initial position of the spindle and the machining tool before the rigid tapping process, And a data processing unit 120 for calculating an axial direction transfer distance, And returns to the machine ready state in which the axis feed drive section 220 and the spindle drive section 210 can be driven to rotate the spindle in the opposite direction by the rotation number and the feed distance calculated by the data processing section 120, And a return control unit (140) for returning the spindle and the machining tool to the initial position, And a control unit for controlling the operation of the rigid tapping return control unit. The method according to claim 1, The apparatus of claim 1, further comprising an input / output unit (300) provided with an alarm display unit (330) for displaying the machining stopped during the rigid tapping operation by the abnormality check unit (130). There is provided a method of controlling the return of a rigid tapping using a CNC apparatus having a spindle driving unit for rotating a workpiece and a shaft feed driving unit for axially moving the tool, (A) storing axially initial positions of the spindle and the machining tool before rigid tapping, (S 1), (B) checking whether power supply to the spindle driving unit 210 or the axis feed driving unit 220 is interrupted during the rigid tapping process, (S 2), (C) calculating a spindle revolution number and an axial feed distance necessary for returning to the initial position stored in the step (A) by detecting the axial position of the spindle and the machining tool in the machining stopped state and 3), (D) rotating the spindle in the opposite direction by the rotation speed and the transfer distance calculated in the step (C), and returning to the machine ready state in which the spindle driving unit (S 4) of automatically returning the spindle and the machining tool to the initial position by axially transferring the machining tool in a reverse direction, And a control unit for controlling the operation of the rigid tapping return control unit.

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