JPS5964251A - Method of cutting work - Google Patents

Abstract

PURPOSE:To always enable uniform cutting in lathe work, by detecting the change in the diameter of a workpiece through a measuring section to cut the workpiece while modifying the position of a tool depending on the detected value. CONSTITUTION:After the cutting tip of a tool 5 is positioned in the directions of axes X, Z and the tip of the measuring member 10a of a measuring unit 10 is placed in contact with the outside surface of a workpiece 6, the cutting of the workpiece is started on a lathe. The outside diameter of the workpiece 6 is decreased with the cutting. The decrease in the outside diameter is propagated in the longitudinal direction of the workpiece 6 as the tool 5 is moved in the direction of the axis Z. The information that the measuring member 10a has been moved forth by the cut quantity of the workpiece 6 is obtained by the measuring unit 10. At the same time, a slider 8 is moved in the direction of the axis Z. According to this method, uniform cutting is always enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of actually measuring the cutting sound of a rigid material during cutting with a lathe, and proceeding with the cutting while correcting the position of the blade based on the measured value.

In lathe machining, if the bed on which the tool rest slides during cutting is worn out, the tool rest will not slide parallel to the axis of the rigid workpiece, and as a result, the workpiece This method has the disadvantage of not being able to cut the material evenly to a uniform diameter, and also
If the material to be stiffened is long and large, or pipe-shaped and prone to deflection, use the :I! I'-Regardless of the quality of movement accuracy, the workpiece may be deflected due to its own weight, or
The same difficulty as described above occurs when the workpiece escapes to the side opposite to the cutter due to the cutting force.

Since then, to solve the above-mentioned difficulties, for example, the position of the turret has been extracted using numerical values, etc.2', or since the correction value is fixed, the stiffness of the material The material, shape, hardness, or blade i! At present, it is not possible to sufficiently correct machining asymmetry, which varies depending on the grade and cutting speed φ.

In view of the above, the present invention has been made with the object of providing a cutting method that can always perform uniform cutting, regardless of the cause of machining unevenness in turning wheel machining.
In this case, the formation forms a reference point or surface on the fixed thread of the lathe main body or a fixed part other than the main body, and
At the fishing point or center, cut the center of the workpiece material in the direction perpendicular to the axis of I71 or approximately IU. Change in the diameter of the front burr cutting machine during forming L1 cutting process?Detected by the above-mentioned total 6111 parts L-
Therefore, the present invention is characterized in that the entire workpiece is cut while correcting the cutter part based on this detected value.

Next, examples of the method of the present invention will be explained with reference to the drawings.

Is Figure 1 a round bar made on a lathe? In the side sectional view of the cutting process, 1 is the bed, 1a is the sliding surface 1J11 in the X-axis direction,
Reference numeral 2 denotes a vertically conveying table placed on the sliding surface 1a, 2a is a sliding surface formed on the vertically conveying table 7 in the direction of the X cape, and 3 is a vertically conveying table placed on the sliding surface 2a. Nine horizontal feeders are mounted, 4 is a tool rest installed on the horizontal feeder 6, 5 is a cutter fixed to the tool rest 4, 6 is a chuck of the headstock and a shaft of the punch press (both 1 and 1 are The cutting tool 5 is moved in the X-axis direction by the feeding table 6 to a cutting depth of t.
In addition, the cutting length is controlled by moving the cutter 5 in the pzX-axis direction (by the vertical feed table 2).

Note that 6a in the figure is a cross-feeding handle, and the cross-feeding can be performed not only by this handle 6a but also by an appropriate drive source (not shown) such as a motor.

Facing 2, 7 is a blade 5 with respect to the workpiece side 6 in the lathe.
The pillar 8 is a reference plane provided on the upper part of the pillar 7, and here, a plurality of pillars 7 are installed on the side opposite to the bed 1.
Therefore, the reference surface 8 is formed of a long material along the longitudinal direction of the bed, and the center hole L/axis of the reference surface 8 is connected to the chuck of the lathe. It is set parallel to the line connecting the center and the center of the tailstock shaft. 9 is a slider mounted on the reference surface 8, 10 is a device 7 fixed on the slider,
The Oki 1 constantor 10a is biased by a spring or the like with a small force that constantly advances to the 1 side of the workpiece 6, and is movable in a direction perpendicular to its axis. The quantity can be extracted as an electrical or mechanical information quantity 7. Reference numeral 10b denotes a contact surface provided at the tip of the measuring tip IQa, which is used to ensure that foot measurement will not be hindered even if the axis of the workpiece 6 is in the vertical direction. In the embodiment, the slider 9 is configured to be able to fully slide on the reference surface 8 in synchronization with the sliding of the vertical feed base 2.
10b to 10b constitute an example of a measuring unit used to carry out the method of the present invention. Therefore, in carrying out the method of the present invention, when cutting, it is necessary to At the same time as determining the position, the tip of the probe 10a of the measuring instrument 10 is attached to the workpiece 6.
Start cutting completely with the tool in contact with the outer surface of the tool.

When cutting starts, the outer diameter of the workpiece 6 becomes smaller by the amount of the cutting process, and the workpiece 6 moves along its longitudinal direction.In other words, the cutter 5 moves in two axial directions. On the other hand, in the measuring instrument 10, the measuring tip 10a is moved to the workpiece 6.
The slider 8 moves forward by an amount corresponding to the cut f'L, and the sentence information is obtained.In this state, the slider 8 moves along the two axes.

During this period, ensure that the cutting depth is as specified and that the central axis of the workpiece 6 does not oscillate n*D.
The advance and retreat of 0a remains stationary, but for some reason the cutting depth becomes thicker than the predetermined value, or the axis of the workpiece 1j moves in the X-axis direction without cutting against the cutting resistance. When the sensor sips again, these disturbances are detected by the measuring device 10 as information on the excessive amount of the probe 10a.

Therefore, if the information about the amount of advance and retreat of the probe 10a is taken as the correction value for the positioning of the blade 5 in the X-axis direction, then the material 6 can be cut in a predetermined manner.

For example, if the cutting depth is larger than a predetermined value, the cutting depth is obtained by the measuring device 10 as the advance of the probe 10a and the depth f, so the blade 5 is moved back by that amount in the X-axis direction. Conversely, when the cutting depth ζ force becomes smaller than a predetermined value, positioning is performed to advance the cutting tool 5'k in the X-axis direction by that amount. Incidentally, this correction value can be used as the positive value of X@Ii of the numerical control device.

In the embodiment according to FIG. 1 described above, the axis of the workpiece 6 is
This corresponds to the case where the cutter is rotated in the X-axis direction, that is, in the horizontal force direction.If the configuration of the first section is shown in Fig. 2, the axis of the workpiece 6〃S blade -5 In addition to the horizontal direction, when it is shifted vertically or in an intermediate direction,
The position of the blade 5 can be corrected. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same members.

Accordingly, in the embodiment shown in the second figure, two measuring instruments 10 are used, and their probes 10a, 10a are aligned along the X-axis direction with respect to the axis of the workpiece 6, and at appropriate angles to the X-axis. They were placed facing each other at an angle.

In this way, even if the center of the workpiece 6 shifts relative to the tip of the cutter 5 horizontally, vertically, or in any intermediate direction, In addition, in the embodiment shown in FIG.
Since over-cutting and shaft scratches can be detected separately, there is an advantage that the information can be used not only for correcting the position of the blade 5 but also for other countermeasures.

In the embodiment shown in FIG. 2, the support 7 is fixedly provided on the bed 1 of the lathe, for example via an electromagnetic clamp 7a'.
Of course, the support 7 may be provided at a location separate from the machine as in the case shown in the first figure.

The beam of the present invention is an upper through hole, and cutting work is performed while constantly monitoring the cutting diameter of the rigid material and correcting the position of the cutting tool in the xsi direction. It is possible to perform cutting with a uniform machining diameter while maintaining the an1 machining diameter at a predetermined value, which is extremely useful in practice.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the implementation of the present invention, and Fig. 2 is a separate side sectional view. 1...Bed, 2...Vertical feed stand, 6...Horizontal feed stand, 4...Turret rest, 5...Cuttle, 6...Workpiece, 7
... Support column, 8 ... Reference plane, 9 ... Slider, 1
0...Measuring instrument, 10a...Measuring element representative Yoshikuni Koizumi Figure 1 Otsubushi 2

Claims (1)

[Claims] A reference point or face plate is formed on the fixing system of the lathe body or an identified part other than the body, and the base point or face can be advanced or retreated in a direction perpendicular or substantially perpendicular to the central axis of the rigid material. A measuring unit is formed by fully mounting a measuring device having a measuring head, and the measuring unit detects changes in the diameter of the workpiece during cutting, and the position of the blade is corrected based on this detected value. A cutting method characterized by cutting a rigid material.