JPS6138792A - Working device on outer peripheral face of annular or tubular body - Google Patents

Abstract

PURPOSE:To enable a continuous engraving onto the outer peripheral face of a work by holding an annular work circularly and by irradiating a YAG laser beam with the prescribed amplitude in peripheral direction based on the neutral line intersecting at right angles with the axial line of a work. CONSTITUTION:A working device irradiating the YAG laser beam which is emitted from a laser oscillator 1 on the outer peripheral face of annular work 3 rotating with being held by the chuck shaft 4a of a circular 4 is provided. An irradiating pattern and timing corresponding to the engraving pattern are programmed in the controller of the oscillator 1 and the control of the pulse motor rotating the work 3 is linked with the control of the oscillator 1, it is constituted in the controller of the oscillator 1. In case of the work the amplitude x in the prescribed range in the peripheral direction of the working article 3 is given on the basis of the neutral line 5 intersecting at right angles with the axial line 4b of the work 3 to the laser beam. The working device enabling a continuous engraving on the outer peripheral face of an annular work is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for processing the outer circumferential surface of a tubular object, and more particularly to an apparatus for engraving patterns or characters on the outer circumferential surface of a ring-shaped or tubular object, such as a ring, using a YAG laser. .

(Prior Art) Conventionally, there are devices in which a lot number, product model number, and model name are printed on the surface of a metal member using a YAG laser or a CO2 laser. This is to print numbers or alphabets consisting of several letters on a small part of a workpiece made of a flat or curved surface. Although it is extremely easy to print on a flat surface, it is very easy to print a pattern on the outer circumferential surface of a product that has a curved surface with a high curvature, such as a ring or tube shape such as a ring or a fountain pen cap. When printing, since the engraved or printed surface is a curved surface, the focus of the laser beam tends to shift, and even if it is irradiated continuously in the circumferential direction, it is difficult to focus, so the pattern or characters may be deformed. Currently, it is not possible to print a continuous pattern or print in the circumferential direction in some areas because it becomes hazy.

(Technical Problem) A technical problem of the present invention is that when processing the outer circumferential surface of a ring-shaped or tubular object using a YAG laser, the light receiving device on the processing surface is always kept near the focal point of the laser beam, and the The purpose is to provide a function of engraving a pattern or character on the entire outer peripheral surface of the coated workpiece with one culm.

(Structure) The apparatus for processing the outer peripheral surface of a tubular object of the present invention that achieves the above-mentioned technical problem includes a YAG laser oscillator, a controller that controls the irradiation direction of the laser beam, and a laser beam of the YAG laser oscillator. Hold a ring-shaped or tubular workpiece in a state facing the irradiation port and rotate it at a predetermined speed 1
The laser beam is irradiated with a predetermined amplitude in the circumferential direction of the workpiece with a neutral line perpendicular to the axis of the workpiece as a reference.

(Function) A ring-shaped or tubular workpiece is held in a state facing the irradiation port of the YAG laser oscillator by the I-nercular, and rotated by the rotation of the chuck shaft of the circular. At this time, a laser beam from a YAG laser oscillator is applied to the outer circumferential surface of the workpiece, and the direction of the oscillation, the pattern of patterns and letters, and the like are arbitrarily controlled by a controller. Further, a predetermined amplitude is applied to the norther light in the circumferential direction of the workpiece with reference to a neutral line orthogonal to the axis of the workpiece, so that the light receiving position aft on the machined surface is always at the laser "-". The light is kept near the focal point.

Therefore, the ring-shaped or tubular workpiece is rotated at a predetermined speed, and arbitrary patterns and characters are continuously engraved on the entire outer peripheral surface of the ring-shaped or tubular workpiece.

(Example) An example of the present invention will be explained based on the drawings.
A laser oscillator (1), a controller (2) (microcomputer) that controls the oscillation and stopping of the laser beam, illumination, q, and one direction, and a ring-shaped or tubular workpiece (3)
(in this embodiment, indicated by a ring '?J') and a circular ring (4) for holding and rotating the laser oscillator (1). - Ij'' - Light beam -: V Collar - (4) chuck shaft (
A pattern or a character is engraved by hitting the outer peripheral surface of the workpiece (3) which is rotated while being held by 4a).

The light source of the YAG laser oscillator (1) is Nd:
This is a YAG laser #r light, and the output and oscillation stray current of this laser light are set in the power ply (6) communicating with the laser oscillator (1). Power supply (6
) converts the output from the transformer (7) into a set output corresponding to the above settings and sends it to the laser oscillator (1).

Inside the laser oscillator (1) is an oscillation tube (8) consisting of a Crimpton lamp that oscillates laser light in response to the output from the power supply (6).
) The laser light emitted from the movable mirror (
10).

The movable mirror (10) is arranged at a angle of 4° to the laser beam emitted from the oscillation tube (8) so as to reflect the laser beam at right angles.
One is also provided on the main body of the laser oscillator (1) at an angle of 5°, and the emitted laser light is reflected to the condenser lens (11) provided on the bottom surface of the laser oscillator (1). Further, the movable mirror (10) is supported by a drive device so as to be tiltable in all directions, and its operation is controlled by a controller (2) (microconveuce).

□Then, the laser beam reflected by the movable mirror (10) passes through the focusing lens (11), and the focus position of the lens (downward approximately 19CI11) is determined, that is, the workpiece (3).
The light is focused on the outer circumferential surface of the ring. However, Sea 11-
The laser beam emitted from the oscillator (1) is transmitted through a movable mirror (
10) Within a predetermined range, for example, the − side is 8Cw.
Freely move the square of l before OA'c to make it J°.

On the other hand, the circuit collar (4) that supports the workpiece (3) is supported horizontally, and has a chuck shaft (4a) on which several rings are fitted and held in parallel at the tip of the eye, and the chuck shaft (4). 4a) and a pulse motor (13) that rotates via a deceleration mechanism (12), and is mounted on the fixed root (1!i) so that it can be lowered freely.

The pulse motor (13) is rotated, rotated, and stopped by the controller (14).1. and control the timing of each. Also, -1 note 2 controller (14
) has a built-in microcomputer for operation control,
The rotation of the chuck shaft (4a) is controlled by performing predetermined programming on this. Furthermore, the controller 14) and the controller (2) that controls the laser oscillator (1) are linked to determine the timing of the rotation of the block shaft (4a) and the irradiation operation of the laser beam.

In addition, when the laser IJ''-light is oscillated with several movable mirrors (10), in other words, without being tilted, the laser beam passes through the optical axis of the lens and is irradiated with a predetermined beam. Pass through the neutral line (5) which is the center of the range (eg 0 CTI angle).

Then, this neutral line (5) and the chuck shaft (
4a) are arranged perpendicular to the axis center line (4b), and the neutral line (5) is placed in the U laser beam based on the base 11 (11) to capture a predetermined range of image width in the circumferential direction of the tubular workpiece (3). Rieru.

This swing width varies depending on the diameter of the workpiece (3), and becomes sharper as the diameter of the workpiece (3) becomes larger. The dough is
As the 1st position shifts from the 2:l-tral line <5) in the circumferential direction, the luminous flux density of the 1st normal light decreases as it dances away from the focal point of the 1st normal light, and it becomes impossible to make 9-length increments. Both are used to prevent the pattern from becoming unclear due to the 1 norther light being applied diagonally to the cutting surface.

As shown in Figure 4, this range is the neural line (5)
It is determined at an angle 0 in the circumferential direction with the center at the center, and the range χ in the circumferential direction lj is represented by the radius Rx5inOx2 of the workpiece. The angle 1α of O actually used is suitable to be 20°iii.

In order to set the amplitude of the laser beam to a range that extends from the predetermined 0 range, the controller 2 of the laser generator 1i (1) or the 1 node
- The controller (14) of the Kikolar (4) has a function of keeping the amplitude of the laser beam at a predetermined width even when the diameter of the liquid adder (3) changes.

Next, we will explain how to use and operate the 71117-device (A) described above, using the outer peripheral surface processing of a ring as an example.
It is within a square with 11 corners, and Le 1F within that 81 corner.
- The minimum distance traveled by light is 0.008 degrees. As a result, the length and breadth are divided into 1000 sections, and there is 1 section within 8CT11 corners.
Million steps are scattered in parallel. Laser light can be freely irradiated between these tubes.

Replace the pattern line of the de-inked ring with the step described above, program each step position through which the pattern line passes into the controller (2) of the laser oscillator (1), and direct the laser beam along the programmed step. and irradiate it.

Furthermore, since the amplitude of the laser beam in the circumferential direction is determined by the diameter of the ring and the angle setting of θ as described above, the number of steps in the circumferential direction is also reduced accordingly. The amplitude is determined from the above, and the controller (2) is used to control the laser beam so that it does not exceed the amplitude.

The laser beam oscillation shaft 1P-tsuku axis (4a) is rotated at the same time (1), or after engraving a pattern with an amplitude of 1, the V-tsuku (4) is rotated at an angle of amplitude χ (1). angle of θ×2)
It is also possible to repeat the alternating motions of minute rotations, and the selection is made depending on the pattern of the pattern. For example, as shown in Figure 5, the latter method is suitable when dividing the outer circumferential surface of a ring into equal parts in the circumferential direction and engraving the same pattern continuously within each division, as shown in Figure 6. Similarly, the former method is suitable for patterns in which a large number of continuous pattern lines run in the circumferential direction.

In addition, several rings can be fitted and held in parallel on the chuck shaft (4a), and the vertical illumination range (tJJ) in the axial direction (
If it is within 8CTI+), it is possible to process multiple rings into one mark.

In the processing device (A) configured as described above, many types of patterns are programmed into the controller (2) in advance, and when the desired pattern is called out during processing, the ``1 gram number'' and the ring diameter are specified. According to the program of the pattern, the laser beam irradiation]-S1 oscillation, stop timing, rotation of the chuck (4), and setting of the turning angle for stopping are all automatically set. It is possible to process 6 rings.In addition, since it is non-contact processing using laser light, it is possible to process delicate and uniform depths, and there is no need for consumables such as There is no cutting scrap.

(Effects) The apparatus for processing the outer peripheral surface of a ring-shaped or tubular object according to the present invention is a YA
G Rayleigh 7 - oscillator, a controller that controls the irradiation direction of this laser beam, and the sea 1 of the YAG laser oscillator.
1-Light irradiation [It consists of a ring-shaped or tubular workpiece that is held in a state facing 1 and rotated at a predetermined speed, and the laser beam is directed with reference to a neutral line perpendicular to the axis of the workpiece Since the laser beam is irradiated with a predetermined amplitude in the circumferential direction of the pressurized object, the laser beam receiving position on the outer peripheral surface of the tubular workpiece is always maintained near the focal point of the laser beam, and this Since the workpiece can be rotated at a predetermined speed while the workpiece is in a state of G-Ray 11 - By setting the irradiation direction of the oscillator and the rotating speed of the chuck, the pattern engraving work can be completely automated, and the pattern engraving work can be completely automated, creating precise and delicate lines unique to lasers on the outer circumferential surface of the workpiece, which has a curved surface. A continuous pattern can be engraved at low cost.

[Brief explanation of the drawing]

Fig. 1 is a hemostasis diagram showing the processing equipment in which the present invention is implemented;
The figure is an enlarged partially cut-away plan view showing the circuit 4-collar, Fig. 3 is a front view of Fig. 2, Fig. 4 is a schematic diagram showing the relationship between amplitude χ, and Figs. 5 and 6 are It is a front view showing a ring.

Claims (1)

[Claims] A YAG laser oscillator, a controller that controls the irradiation direction of the laser beam, and a circular that holds a ring-shaped or tubular workpiece facing the laser beam irradiation port of the YAG laser oscillator and rotates it at a predetermined speed. an outer circumferential surface of a ring-shaped or tubular object, characterized in that the laser beam is irradiated with a predetermined amplitude in the circumferential direction of the workpiece with reference to a neat line perpendicular to the axis of the workpiece; processing equipment.