JPH0564950A - Marking method for improving quality of character at start and end point - Google Patents

Abstract

PURPOSE:To improve the quality of characters of a marking device by setting a working start point and a working end point between a start point and an end point so that only turning back is required at the start and end points, eliminating thereby traces of punching. CONSTITUTION:When an air pen is pressed against a workpiece and moved, while the pen is being vibrated, to form a line or a character comprising a series of points, a working start point 3A is set between a start point 3B and an end point 3C of the workpiece and the air pen is lowered to start vibrating the air pen at the point 3A and the pen is moved while working is being continued and then the pen is turned back at the point 3B to continue the working. A working end point 3D is set between the point 3B and the point 3C, and at the point 3C the vibration of the pen only is terminated to turn back the pen and the pen is raised at the point 3D. Consequently, punching is not repeated on one point and hence deep traces of punching are not formed at the points 3B, 3C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking method for improving the character quality of a starting point and an ending point in marking.

[0002]

2. Description of the Related Art Next, the structure of a conventional marking device will be described with reference to FIG. In FIG. 3, 1 is an air pen, 2 is a workpiece, 4 is an NC device, 5 is a motor, 6 is a ball screw, 7 is an air cylinder, and 8 is an air supply unit.
The air pen 1 moves on the ball screw 6 on the XY axes by a value given from the NC device 4 to the motor 5.

Next, the operation of the air pen 1 shown in FIG. 3 will be described with reference to FIG. When air is supplied from the air supply unit 8 to the air cylinder 7, the air pen 1 can be moved in three stages of upper, middle, and lower as shown in FIG. 4, and the vibration of the air pen 1 can be started or stopped. The structure of the air pen 1 is described in Japanese Patent Publication No. 56-7084, and the vibration of the air pen 1 is described in, for example, Japanese Patent Publication No. 3-27397.

In FIG. 3, after the air pen 1 is lowered at the start point and the vibration of the air pen 1 is started, a timer is provided on the software to wait until the vibration stabilizes, and then the air pen 1 is moved to the machining end point. At the processing end point, the vibration of the air pen 1 is stopped, and the air pen 1 is raised to end the series of markings.

[0005]

Next, the processing situation of the character "L" according to the prior art will be described with reference to FIG. 5A is a plan view, and FIG. 5A is a sectional view taken along line AA.

9A in FIG. 5A is the starting point, and the dent is larger than the portion other than the starting point. This is for the following reason. When air is supplied to the air pen 1 to start vibration, and at the same time when the air pen 1 is moved, the frequency suitable for machining has not been reached, so the surface of the work piece 2 is not a continuous line of dots but a space. The empty points are stamped. In order to solve this, a means for providing a timer with software is taken from the time when the vibration of the air pen 1 is started until the time when the air pen 1 is moved. Repeat the stamping at the same place to deepen the nick at the starting point 9A.

3B in FIG. 5A is the end point, and the dent is larger than the part other than the end point. This is for the following reason. By stopping the air supply to the air pen 1 at the end of processing,
Even if the vibration of the air pen 1 is stopped, the vibration of the air pen 1 does not stop instantly. Since the air cylinder 7 is used,
It also takes time to raise the air pen 1 and separate it from the workpiece 2. Therefore, the air pen 1 repeats stamping at the same position of the end point 9B to deepen the dent.

An object of the present invention is to provide a marking method for improving the character quality of the starting point and the ending point by setting the processing starting point and the finishing point in addition to the starting point and the ending point.

[0009]

To achieve this object, according to the present invention, a marking device for processing a line or a character as a series of dots by pressing an air pen 1 against a workpiece 2 and moving the same while vibrating it, Start point 3B of work piece 2
The machining start point 3A is set between the end point 3C and the end point 3C, the descent of the air pen 1 and the vibration of the air pen 1 are started at the machining start point 3A, the air pen 1 is moved while continuing the machining, and the start point 3B is set.
Then, the air pen 1 is folded back to continue machining, and the machining end point 3D is set between the start point 3B and the end point 3C of the work piece 2. At the end point 3C, only the vibration of the air pen 1 is stopped and folded back. Raise the air pen 1.

[0010]

Next, the marking method according to the present invention will be described with reference to FIG. 3A in FIG. 1 is a machining start point, 3B is a start point, 3
C is the end point, and 3D is the processing end point. 3B in FIG. 1 is shown in FIG.
3C corresponds to the starting point 9A and 3C corresponds to the ending point 9B.

The machining start point 3A is set between the start point 3B and the end point 3C of the work piece 2, and the machining end point 3D is the work piece 2
Is set between the start point 3A and the end point 3C. Processing start point 3
At A, the descent of the air pen 1 and the vibration of the air pen 1 are started, and the air pen 1 is moved while continuing the processing, and the start point 3B
Then, fold back the air pen 1 and continue processing. At the end point 3C, only the vibration of the air pen 1 is stopped and folded back, and the air pen 1 is raised at the processing end point 3D.

Next, the processing flow of FIG. 1 will be described with reference to FIG. In step 11 of FIG. 2, the air pen 1 is lowered, the vibration of the air pen 1 is started, and the movement of the air pen 1 is started. At the starting point 3B, it is folded back and processing is continued. In step 12, the vibration of the air pen 1 is stopped, and in step 13, the air pen 1 is raised to complete the marking.

According to FIG. 1, since the vibration of the air pen 1 is stabilized in the time for moving from the machining starting point 3A to the starting point 3B instead of the conventional timer, the stamping is not repeated at the same point, and the starting point 3B is eliminated. It is possible to eliminate deep dents on the. Further, since the vibration of the air pen 1 is stopped in the time it takes to move from the end point 3C to the machining end point 3D, even if it takes time to raise the air pen 1, the stamping is not repeated at the same place, and at the machining end point 3D. It is possible to eliminate deep dents.

[0014]

According to the present invention, since the machining start point and the machining end point are set between the start point and the end point, and only the folding is performed at the start point and the end point, it is possible to eliminate the dents at the start point and the end point.
The character quality of the marking device can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a marking method according to the present invention.

FIG. 2 is a processing flow of FIG.

FIG. 3 is a block diagram of a conventional marking device.

FIG. 4 is an operation explanatory view of the air pen 1 of FIG.

FIG. 5 is an explanatory diagram of a processing state of a character “L” according to a conventional technique.

[Explanation of symbols]

 1 Air Pen 2 Workpiece 3A Machining Start Point 3B Starting Point 3C End Point 3D Machining End Point 4 NC Device 5 Motor 6 Ball Screw 7 Air Cylinder 8 Air Supply Unit

Claims (1)

[Claims] 1. In a marking device for processing a line or a character as a series of points by pressing an air pen (1) against a work piece (2) and moving it while vibrating the start point (3B) of the work piece (2). Machining start point (3C)
A) is set, the descent of the air pen (1) and the vibration of the air pen (1) are started at the machining start point (3A), the air pen (1) is moved while continuing the machining, and the air pen (1 ) To continue machining, and between the start point (3B) and end point (3C) of the workpiece (2), finish the machining (3
D) is set, at the end point (3C), only the vibration of the air pen (1) is stopped and folded back, and the air pen (1) is raised at the machining end point (3D). Improved marking methods.