JP2001105281A - Tool blade tip position display device for turret lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device facilitated in recognition of the blade tip detecting condition and abnormality of the blade tip position by an operator when detecting the blade tip position installed in a turret of a turret lathe. SOLUTION: This display device is provided with a blade tip detecting unit provided with plural contacts for entering a working area of a lathe, a memory means for storing the correction value of the blade rest position to be detected with contact of a tool blade tip with a contact of the detecting unit, a display for displaying the correction value, a memory means for storing the last correction value, and a computing means for computing a difference between the last correction value and the real correction value. The real correction value, the last correction value, a difference between them and a contact, with which a tool contacts, are displayed in the display per each tool. With this structure, the determination of abnormality of tool, defective of a tool when exchanging the tool, and appropriateness or not of the correction value is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the position of a cutting edge of a tool mounted on a turret of a turret lathe using a cutting edge detecting device, and displaying the result on a display provided on a control panel of the lathe. The present invention relates to a device that performs

[0002]

2. Description of the Related Art A machine tool processes a workpiece by moving a tool to a position commanded by an NC device with a specific coordinate position set in the machine as an origin. The tool is mounted on the tool post or tool axis of the machine tool.However, due to the mounting error of the tool or the degree of wear of the tool tip, the error in the position of the tool tip when the tool post or the tool axis is moved to the home position. Occurs. Since the error in the position of the blade edge is directly reflected in the processing error of the work, it is necessary to detect the error in advance and move the tool rest or the tool axis to a position where the error has been corrected.

[0003] The error in the position of the cutting edge is determined by installing a cutting edge detector at a specific position in the machining area of the machine tool and reading the coordinates of the tool rest or the tool axis when the cutting edge of the tool comes into contact with the cutting edge detector. Can be detected by That is, when a tool without error is installed without error, the coordinates of the tool post or tool axis when the tool edge contacts the tool edge detector installed at a specific position can be theoretically calculated, so that the reference value The difference between the actual position of the tool and the coordinates when the tool edge of the actually mounted tool comes into contact with the tool edge detector is the position error of the tool edge, and this is a correction value for moving the tool rest or tool axis.

[0004] The detection of the position error of the tool edge is usually performed manually by an operator, for example, at the start of work or when a tool is changed. At this time, the detected value or the correction value is displayed on a display provided on the operation panel of the machine tool so that the operator can confirm the detection result of the cutting edge. FIG. 4 is a diagram showing an example of a display on the turret lathe when a tool edge is detected.
The turret lathe is provided with a plurality of tool mounting stations, and two tools may be mounted on one tool mounting station, for example, one with a right-edge and one with a left-edge. Since the correction of the cutting edge position needs to be performed for each tool, correction numbers G01, G0
.. Are assigned, and correction values (errors from the reference value of the cutting edge) in the X-axis (vertical axis) direction and the Z-axis (spindle) direction of the cutting edge for each tool are displayed in a list. When the operator selects a specific correction number (tool) and performs a cutting edge detection operation, a correction value corresponding to the detected cutting edge position is displayed in each of the X-axis direction and the Z-axis direction.

[0005]

However, in the display as shown in FIG. 4, the tool correction number corresponds to the tool mounted on which tool mounting station of the turret, and the cutting edge detector and the tool are not used. However, there is a problem that it is necessary to look into the inside of the lathe to check them, and it is difficult to know whether or not there is an abnormality in the position of the tool edge.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a display device that allows an operator to more easily recognize the detection state of a cutting edge, an abnormal position of the cutting edge, and the like when detecting a cutting edge of a tool in a turret lathe.

[0007]

SUMMARY OF THE INVENTION A display device of a tool edge position in a turret lathe according to the present invention includes a blade edge detector 1 having a plurality of contacts 3 which advance to a specific position in a machining area of the lathe, and this detector. Storage means for the correction value of the tool post position detected by contacting the tool edge with the contact of the
A display device for displaying the position of a tool edge in a turret lathe having a display for displaying the correction value, comprising: a storage unit for a previous correction value; and a calculating unit for calculating a difference between the previous correction value and the current correction value. The correction value, the previous correction value, the difference between the two, and the contact of the tool with the tool are displayed for each tool.

[0008] More preferably, the number of the tool mounting station of the turret is displayed together with the number assigned to the tool mounted on the turret.

According to the display device, the present value and the previous value of the correction value for a certain tool are displayed at the same time, and the difference between the current value and the previous value can be easily determined based on the change in the correction value. In addition, it is easy to determine whether the tool is good or not, such as when the tool is replaced, and whether the correction value is appropriate. In addition, since it is possible to confirm on the display which direction the blade mounting station and the blade edge contact with the blade edge detector are performing the blade edge detection, the blade edge detection operation can be performed more easily and reliably.

[0010]

1 to 3 show an embodiment of the present invention. FIG. 1 is a diagram showing a display example of a display, FIG. 2 is a block diagram of an apparatus, and FIG. 3 is a detection of a cutting edge. It is a flowchart which shows a procedure.

In the block diagram of FIG.
Is attached to the tip of a support arm 2 which is attached to a headstock of a lathe (not shown) so as to be able to advance and retreat, and moves out onto the spindle axis of the lathe when performing a work of detecting a cutting edge. The blade edge detector 1 includes four contacts 3 on the near side and the far side in the X-axis direction and on the right and left sides in the Z-axis direction.

The turret tool rest 4 is connected to servomotors 5 and 6 for moving in the X-axis direction and the Z-axis direction via feed screws 7 and 8, respectively. Are detected by the pulse encoders built in the servo motors 5 and 6 and are input to the NC controller 9.

The NC control unit 9 corrects each tool based on the preset movement amount of the tool rest from the reference position and the movement position of the tool rest when the tool tip is detected by the tool tip detector 1. Calculate the value. When the tool is in contact with the calculated correction value and the contact of the blade edge detector, the contact signal is sent to the display control means 10 and the data is displayed on the display 11.

The detection of the tool edge is performed according to the procedure shown in FIG. First, the retracted cutting edge detecting device is advanced on the spindle axis, and an initial screen is displayed on the display.
Next, a predetermined tool is determined, and the tool edge is advanced toward the blade edge detector, and data stored as a current correction value during that time is stored as a previous correction value. When the tool edge touches the contact of the edge detector, the correction value calculated from the coordinates of the tool post at that time is stored as the current correction value data, and the difference between the current correction value and the previous correction value is calculated. Remember. The data of the correction value and the difference, the correction number assigned to the tool, the number of the tool mounting station corresponding to the index position of the turret, and the contact signal of the contact contacting the tool are sent to the display control device 10. ,
The information is displayed on the screen of the display 11 corresponding to a predetermined arrangement.

FIG. 1 shows a display example of the display, wherein the current correction value, the previous correction value and the difference between the turret mounting station number T01, the tool correction number G01, the X-axis and the Z-axis are represented by characters. The data is displayed as data, and the blade tip detector is graphically displayed to blink or reverse the contact 3 with which the tool is in contact.

According to such a display, the correction value of the position coordinate is displayed in a form in which the present value is compared with the previous value for each tool mounted on each tool station of the turret, and furthermore, the cutting edge Since the contact direction of the tool to the detector can be recognized at a glance, the operator can easily detect the tool edge, and can also easily detect abnormality and wear of the tool.

[Brief description of the drawings]

FIG. 1 is a diagram showing a display example of a display.

FIG. 2 is a block diagram showing an embodiment.

FIG. 3 is a flowchart showing a procedure for detecting a cutting edge position.

FIG. 4 is a diagram showing an example of a conventional display example.

[Explanation of symbols]

 1 cutting edge detector 3 contact

Claims (2)

[Claims] An edge detector (1) having a plurality of contacts (3) extending to a specific position in a machining area of a lathe, and is detected by bringing a tool edge into contact with the contacts of the detector. In the display device of the tool edge position in the turret lathe provided with storage means of the correction value of the tool post position, and a display for displaying the correction value, storage means of the previous correction value,
Calculating means for calculating the difference between the previous correction value and the current correction value, and displaying, on a display, the current correction value, the previous correction value, the difference between the two, and the contact piece that the tool is in contact with for each tool. , A display device of the tool edge position in a turret lathe. 2. The display device for displaying the position of a tool edge in a turret lathe according to claim 1, wherein a number of a tool mounting station of the turret is displayed together with a number assigned to a tool mounted on the turret.