KR100246307B1 - Shaft feeding temporary stop control method - Google Patents

Abstract

The present invention relates to an axis of a machining center that allows the feed axis to be paused by using a spindle speed override switch to check the machining status or remove foreign substances in the tap tool during machining of a rigid tap in a machining center. A method for controlling the movement pause, the first step (S11) of setting the data memory of the numerical controller 10 to be suitable for the rigid tap machining mode, and the machining data necessary for the rigid tap machining, the data of the numerical controller 10; In the method of controlling the axis feed pause of the machining center which performs the second step S12 of loading into the memory and the third step S13 of terminating the tapping previously performed, the third step S13 is performed. Subsequently, the fourth step S14 of determining whether the switch contact of the spindle speed override switch RS is turned on, and the next tap hole when the fourth step S14 is not turned on are machined. When the fifth step S15 and the fourth step S14 are turned on, it is detected whether the main spindle feed servo motor Zm is being driven, and based on the detection result, the main spindle feed servo motor Zm When it is determined that the main shaft feed servo motor Zm is stopped based on the result detected in the sixth step S16 and the sixth step S16 when the driving is in progress. The seventh step S17 is performed to temporarily stop the table horizontal feed servo motor Xm and the table vertical feed servo motor Ym, and then transfer the command execution to the fourth step S14.

Description

How to control axis feed pause in machining center

The present invention relates to a method for controlling the axis feed pause of a machining center, and more particularly, in order to check a machining state or remove foreign substances in a tap tool in the process of machining a rigid tap in a machining center. The present invention relates to an axis feed pause control method of a machining center capable of pausing a feed axis using an override switch.

As shown in FIG. 1, a general machining center includes a key input unit 11 for inputting a program, a display unit 12 for displaying an image, a casting board 13, and a spindle in an input / output port of the numerical control unit 10. The drive unit 14 and the servo drive unit 15 were connected to each other. A spindle motor Sm is connected to the spindle drive unit 14 and a taco generator (not shown) or a rotary encoder provided in the spindle motor Sm. It was configured to control the speed in the form of closed loop by receiving the speed data of the spindle motor Sm fed back from (not shown), and the servo drive unit 15 has a servo motor Xm for horizontal traverse of the table. ), The table longitudinal feed servo motor (Ym) and the spindle feed servo motor (Zm) are respectively connected to each table for horizontal feed in accordance with the drive signal output from the output port of the numerical controller 10. Acceleration / deceleration control and position control of servo motor (Xm), table vertical feed servo motor (Ym) and spindle feed servo motor (Zm), table horizontal feed servo motor (Xm), table vertical feed servo motor Table transverse servomotor Xm and table longitudinal feed servomotor Xm detected from a taco generator (not shown) or a rotary encoder (not shown) provided in Ym and the spindle motor servo motor Zm, respectively. Ym) and the position and speed data of the servo motor Zm for spindle feed through the input port of the numerical controller 10, and based on this, the closed loop control or the semi-closed loop control (semi-) closed loop control).

In addition, the casting mill 13 has a rotary spindle speed override switch RS having a variable speed of the spindle, a cycle start switch SW1 for inputting a signal to start machining, and a feed for stopping the feed. Hold switch SW2 was provided.

The procedure of the rigid tap machining control using the machining center as described above is shown in FIG. 2. In step S1, the numerical controller 10 starts the rigid tap machining mode, and the data of the numerical controller 10 is controlled. The memory is set to be suitable for the rigid tap machining mode. In step S2, the numerical controller 10 loads machining data such as position data tool data required for the rigid tap machining.

At this time, the numerical control unit 10 in step S3 through the spindle drive unit 14 and the servo drive unit 15, the spindle motor (Sm), the table transverse servo motor (Xm), the table longitudinal feed servo motor (Ym), the main shaft The tapping operation previously performed is terminated by controlling the feed servo motor Zm. In step S4, the numerical control unit 10 checks whether the feed hold switch SW2 is "ON", and the state is " If it is not "ON", the process jumps to step S7 to process the remaining tap holes, and if the state is "ON", the servo motor Xm and the table vertically feed table through the servo drive unit 15 in step S5. The feed servo motor Ym and the spindle feed servo motor Zm are controlled to pause them.

In such a state, the operator can visually check whether the tap machining state is good, as well as remove foreign matters attached to the tap tool.

During the operation of checking the tap machining state by the operator and removing the foreign matter of the tap tool, the numerical control unit 10 periodically checks whether the cycle start switch SW1 is “ON” as in step S6 by periodically rotating in an endless loop. In this case, when the operator presses the cycle start switch SW1 to process the remaining tap hole after finishing the tap machining state and the foreign matter of the tap tool as described above, the numerical control unit 10 performs the cycle start switch in step S6 described above. It is judged that (SW1) is switched to the "ON" state, and as shown in step S7, the servo motor Xm for horizontal table feed, the servo motor Ym for vertical table feed and the main shaft feed servo via the servo drive unit 15 are carried out as in step S7. It was configured to drive the motor Zm to process the remaining tap holes.

However, such a conventional method of controlling the axis feed pause of the machining center is performed after pressing the feed hold switch SW2 as shown in FIGS. 1 and 2 to remove the foreign matter of the tapping state and the tap tool. There was a very uncomfortable point to operate the cycle start switch (SW1) again after the removal of foreign matters.

In addition, if the feed hold switch SW2 is pressed during operation of the spindle feed servomotor Zm by mistake of an operator, as shown in step S5 of FIG. 2, the table feed horizontal servomotor Xm and the table feed vertical servo Since the servo motor Zm for spindle feed together with the motor Ym is also stopped, the tap tool has a problem of being damaged while being caught in the workpiece.

The present invention has been made to solve the above problems, the object of which is to operate the spindle speed override switch only during machining of the rigid tap hole to stop and restart the feed shaft and at the same time when the servo motor for spindle feed is running. Even if there is an operation, the servo motor for spindle feed stops the table horizontal feed servo motor and the table vertical feed servo motor at the time when the spindle feed servo motor stops in the middle after finishing the previous taphole processing. An object of the present invention is to provide a method for controlling axis feed pause of a machining center.

In order to achieve the object of the present invention, the present invention provides a first step of setting the data memory of the numerical control unit to be suitable for the rigid tap machining mode, and a second step of loading machining data necessary for the rigid tap machining into the data memory of the numerical control unit. In the control method for stopping the axis transfer of the machining center performing the step and the third step of terminating the previously performed tapping, it is determined whether the switch contact of the spindle speed override switch is turned on after the third step The fourth step, the fifth step of processing the next tap hole if it is not turned on in the fourth step, and if it is turned on in the fourth step, whether or not the servo motor for spindle feed is being driven and When the servo motor for spindle feed is being driven, the sixth step of skipping command execution to the fifth step and the sixth step When it is determined that the servo motor for spindle feed is stopped based on the detected result, a seventh step of stopping the table horizontal feed servo motor and the table vertical feed servo motor is temporarily performed, and then passing the instruction to the fourth step.

1 is a block diagram showing a control unit configuration of a general numerical control machine tool;

2 is a flowchart showing an axis feed pause control procedure of a conventional machining center;

3 is a flow chart showing the axis feed pause control procedure of the machining center according to the present invention.

Explanation of Signs of Major Parts of Drawings

10: Numerical control part Xm: Servo motor for horizontal traverse of table

11: Key input part Ym: Servo motor for table vertical feed

12: display unit Zm: servo motor for spindle feed

13: casting machine RS: spindle speed override switch

14: spindle drive SW1: cycle start switch

15: Servo Drive SW2: Feed Hold Switch

Sm: Spindle Motor

That is, the present invention sets the data memory of the numerical controller to be suitable for the rigid tap machining mode. The first step of starting the rigid tap machining mode and the second step of loading the machining data necessary for the rigid tap machining into the data memory of the numerical controller. And a third step of controlling the spindle motor, the table transverse servo motor, the table longitudinal traverse servo motor, and the spindle feed servo motor through the spindle drive unit and the servo drive unit by the numerical control unit to terminate the tapping process previously performed. In the axis feed pause control method of a machining center comprising: detecting the switch contact position of the spindle speed override switch input through the input port of the numerical control unit following the third step and determining whether the switch contact is located at the zero point. The fourth step of determining whether or not, and the result determined from the fourth step Solution If the spindle speed override switch is not located at the zero point, the fifth step of machining the next tap hole; and if the spindle speed override switch is located at the zero point based on the result determined from the fourth step, the spindle feed servo On the basis of the speed data transmitted from the motor to the input port of the numerical controller, it is detected whether the servo motor for spindle feed is being driven and if the servo motor for spindle feed is being driven by the detection result, the command is executed in the fifth step. If it is determined that the main shaft feed servo motor is stopped based on the sixth step and the result detected in the sixth step, stop the table horizontal feed servo motor and the table vertical feed servo motor and then execute the command. Stop movement of the axis feed in the machining center to perform the seventh step Intended to provide a way

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

Figure 1 is a block diagram showing the configuration of the control unit of a general numerical control machine tool, Figure 3 is a flow chart showing the axis feed pause control procedure of the machining center according to the present invention, the numerical control unit 10 as shown therein Setting the data memory to be suitable for the rigid tapping mode First step (S11) of starting the rigid tapping mode and the second step of loading machining data necessary for the rigid tapping operation into the data memory of the numerical control unit 10. (S12) and through the spindle drive unit 14 and the servo drive unit 15 by the numerical control unit 10, the spindle motor Sm, the servo motor Xm for horizontal table feeding, and the servo motor Ym for vertical table feeding. In the axis feed pause control method of the machining center consisting of a third step (S13) for controlling the spindle feed servo motor (Zm) to terminate the tapping previously performed, following the third step (S13) A fourth step S14 of detecting the switch contact position of the spindle speed override switch RS input through the input port of the numerical controller 10 and determining whether the switch contact is located at the zero point; If the spindle speed override switch RS is not positioned at the zero point according to the result determined in step S14, the fifth step S15 of processing the next tap hole and the fourth step S14 are determined. As a result, when the spindle speed override switch RS is positioned at the zero point, the spindle feed servo motor based on the speed data transferred from the spindle feed servo motor Zm to the input port of the numerical controller 10 ( A sixth step S16 of detecting whether or not Zm) is being driven and passing the instruction to the fifth step S15 when the main spindle feed servo motor Zm is driven by the detection result; When it is determined that the main shaft feed servo motor Zm is stopped by the result detected in the sixth step S16, the table horizontal feed servo motor Xm and the table vertical feed servo motor Ym are temporarily stopped. The seventh step S17 is performed to transfer the command execution to the fourth step S14.

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

First, as shown in FIGS. 1 and 3, when the numerical control unit 10 starts the rigid tap machining mode so that the data memory is suitable for the rigid tap machining mode, the numerical control unit (10) is configured to process the machining data necessary for the rigid tap machining. 10) and then the spindle motor (Sm), the table transverse servo motor (Xm) through the spindle drive unit 14 and the servo drive unit 15 from the output port of the numerical control unit 10, It presupposes a general control method of terminating tapping previously performed while outputting a drive signal for driving the table longitudinal feed servo motor Ym and the spindle feed servo motor Zm. (Step 1 S11, Step 2 S12, Step 3 S13)

At this time, the numerical controller 10 detects the switch contact position of the spindle speed override switch RS input through the input port of the numerical controller 10, and determines whether the switch contact is located at zero point. 4th step S14)

At this time, if the spindle speed override switch RS is not positioned at the zero point based on the result determined from the fourth step S14, the next tap hole is continuously processed, while the fifth step S15 is performed.

When the spindle speed override switch RS is located at the zero point based on the result determined from the fourth step S14, the numerical controller 10 moves the numerical controller 10 from the spindle motor servo motor Zm. On the basis of the speed data transmitted to the input port of the controller, it is detected whether the spindle motor servo motor Zm is being driven, and when the spindle motor servo motor Zm is driven by the detection result, the fifth The instruction proceeds to step S15 to continue machining the next tap hole. (Sixth Step S16)

When it is determined that the main spindle feed servo motor Zm is stopped by the result detected in the sixth step S16, the table horizontal feed servo motor Xm and the table vertical feed servo motor Ym are temporarily stopped. The execution of the next command is passed to the fourth step S14 to detect the switch contact position of the spindle speed override switch RS inputted through the input port of the numerical controller 10, and to determine whether or not the switch contact is located at the zero point. You will be judged. (Step 7 S17)

That is, when the spindle speed override switch RS and the spindle feed servomotor Zm are respectively positioned at zero points and stopped, the fourth step S14 to the sixth until they are driven to a position other than the zero point, respectively. Step S16 → the seventh step S17 → the fourth step S14 is repeated to form a loop, and the spindle speed override switch RS is not a zero point by the operator's operation. % Position, 40% position,... If the position is set at 200% or the servo motor Zm for spindle feed is being driven, the next tap hole is machined in the fifth step S15.

As described above, the present invention is capable of stopping and restarting the feed shaft by operating only the spindle speed override switch during machining of the rigid tap hole. Therefore, when the servo motor for spindle feed is in operation, this operation is convenient. Even if there is a command delay, the servo motor for spindle feed stops the table horizontal feed servo motor and the table vertical feed servo motor when the spindle feed servo motor stops in the middle after finishing the previous taphole processing. There is an effect that can prevent damage in advance.

Claims (1)

Setting the data memory of the numerical control section 10 to be suitable for the rigid tapping mode; a first step (S11) of starting the rigid tapping mode; A second step (S12) of loading the machining data necessary for the rigid tap machining into the data memory of the numerical controller 10; The spindle controller 14 and the servo drive unit 15 via the numerical control unit 10 allow the spindle motor Sm, the servo motor for table traverse Xm, the servo motor for table longitudinal feed Ym, the servo for spindle feed. In the axis feed pause control method of the machining center consisting of a third step (S13) for controlling the motor (Zm) to terminate the tapping previously performed, A fourth step of detecting whether the switch contact is turned on by detecting a switch contact position of the spindle speed override switch RS input through the input port of the numerical controller 10 after the third step S13 ( S14); A fifth step S15 of processing the next tap hole when the spindle speed override switch RS is not turned on by the result determined from the fourth step S14; On the basis of the speed data transmitted from the spindle feed servo motor Zm to the input port of the numerical controller 10 when the spindle speed override switch RS is turned on by the result determined from the fourth step S14. A sixth step (S16) of detecting whether or not the main spindle feed servo motor (Zm) is being driven and if the main spindle feed servo motor (Zm) is being driven, to carry out the instruction execution to the fifth step (S15); And When it is determined that the main shaft feed servo motor Zm is stopped by the result detected in the sixth step S16, the table horizontal feed servo motor Xm and the table vertical feed servo motor Ym are temporarily stopped. And a seventh step (S17) for transferring command execution to a fourth step (S14).

Images