CN1079437C - Light beam rotating feed mechanism for hole laser quenching - Google Patents

Abstract

A beam rotary feeding mechanism for laser quenching of the inner hole, which uses the focusing lens and the end mirror to feed synchronously in the axial direction, and only relies on the rotation of the end mirror to realize the beam rotary feeding scanning to achieve the inner hole. Hole laser quenching purpose.

The biggest advantage of this structure is that the non-rotating focusing lens can be easily water-cooled, while the spinning end mirror can be effectively air-cooled, and the cooling gas ejected from the light exit hole of the optical tube can also Effectively prevent sputtering from polluting the mirror surface of the end reflector during the quenching process, and receive dual effects of cooling and protecting the mirror surface.

Description

A Beam Rotary Feeding Mechanism for Inner Hole Laser Hardening

The invention belongs to a device for realizing inner hole laser quenching in the field of laser processing equipment.

Before the present invention, there are reported devices for realizing inner hole laser quenching, which are generally divided into two categories, one is a structure that adopts workpiece rotation and beam feed. Since both the workpiece and the beam move, the structure of the device is relatively complex and bulky; the other type is that the workpiece does not move, but the beam rotates and can be fed to achieve laser quenching of the inner hole. The structure of this type of device is just greatly simplified compared with the former.

The prior art closest to the present invention is proposed by Shanghai Optical Machinery, Chinese Academy of Sciences, which adopts the integral rotary feed mechanism of the optical system. (National Laser Processing Technology Exchange Conference 1989.10. Proceedings P163~165. Title: Lifting and rotating processing system of laser processing machine. Author: Chai Hongjun, Liu Yuquan, Chen Lanying of Shanghai Institute of Optics and Mechanics) As shown in Figure 1: 1 is a plane mirror , 2 is a condenser lens, 3 is an end reflector, 4 is a light tube, and 5 is a light exit hole of the light tube.

Since the condenser lens 2 and the end reflector 3 in the optical tube 4 rotate and feed synchronously, the cooling technology of the condenser lens 2 and the end reflector 3 becomes complicated, which is not conducive to the application.

In order to overcome the above disadvantages, the object of the present invention is to realize the rotation and feeding of the light beam with the simplest cooling method and the simplest and most reliable mechanism.

The details of the present invention are as shown in Figure 2: by housing (6,7,15), feeding system (8,9,10,11,12,13,14,21,23), focusing system ( 24, 25), beam end reflector rotation system (16, 17, 18, 19, 20, 22).

The casing 6 has a casing light inlet hole 7 and a casing light tube exit hole 15 .

The feeding system is made up of screw mandrel 8, screw nut 9, guide column 10, supporting plate 11. Wherein supporting plate 11 has supporting plate right hole 12, supporting plate middle hole 13, supporting plate left hole 14, supporting plate motor hole 21, supporting plate air-cooled pipe inlet 23.

The focusing system is made up of a focusing lens 25 and a focusing lens pressing frame 24 with a water cooling channel.

The beam end reflector rotation system is composed of an end reflector 17 , a light tube 18 , a driven gear 19 , a driving gear 20 and a motor 22 . Wherein the light cylinder 18 is provided with a light cylinder light exit hole 16 .

The screw mandrel 8 and the guide post 10 are installed on the housing 6 parallel and vertically. Both ends of the guide column 10 are rigidly coupled with the housing 6 . The two ends of screw mandrel 8 are connected with housing 6 with bearings. The axes of the supporting plate right hole 12 on the supporting plate 11, the supporting plate middle hole 13, the supporting plate left hole 14, and the supporting plate motor hole 21 are parallel to each other. The guide column 10 and the supporting plate 11 are slidingly connected at the right hole 12 of the supporting plate; the screw rod 8 and the supporting plate 11 are matched through the screw nut 9 embedded in the middle hole 13 of the supporting plate; the focusing lens 25 is installed on the supporting plate of the supporting plate 11 On the left hole 14, make the optical axis of the focusing lens 25 coincide with the axis of the left hole 14 of the supporting plate; the focusing lens press frame 24 with a water-cooling channel pressed on the focusing lens 25 and the supporting plate 11 are at the left hole 14 of the supporting plate Connect with screw thread, make focusing lens 25 keep relatively stationary on the position of supporting plate left hole 14. The upper end of the light tube 18 is connected with the supporting plate 11 at the left hole 14 of the supporting plate through a bearing, and the lower end stretches out of the housing 6 through the housing protruding hole 15 . The axis of optical cylinder 18, the axis of supporting plate left hole 14, the optical axis of focusing lens 25, three overlap. The distance between the focusing lens 25 and the end reflector 17 installed in the optical barrel 18 is relatively constant. The end reflector 17 is installed at the light exit hole 16 of the light cylinder, so that the center of the end reflector 17 is aligned with the axis of the light cylinder 18 and forms an angle of 45° with it; the reflected light of the end reflector 17 is parallel to the axis of the light exit hole 16 of the light cylinder ; The cold wind is blown in from the air-cooled pipe inlet 23 of the supporting plate, and the end reflector 17 is air-cooled. The motor 22 is fastened on the supporting plate 11 at the supporting plate motor hole 21, and under the supporting plate motor hole 21, the shaft of the motor 22 is rigidly connected with the driving gear 20, and the driving gear 20 is rigidly fixed on the light cylinder 18 from the The 19 teeth of the moving gear are meshed.

The working principle of the present invention: the external motor drives the screw rod 8 to rotate, and drives the supporting plate 11 to move up and down through the guide column 10. Feed movement, the motor 22 drives the driven gear 19 fixed on the optical tube 18 to rotate through the driving gear 20, so that the end reflector 17 installed in the optical tube 18 rotates. During the rotation of the optical tube 18, the focusing lens 25 always Keeping relatively stationary and not rotating, the rotation of the light beam is realized by the rotation of the end reflector 17 driven by the light tube 18 . In this mechanism, the laser beam enters from the light inlet hole 7 of the casing, passes through the focusing lens 25, and then exits from the end reflector 17, that is to say, the focus lens 25 and the end reflector 17 perform synchronous feed movement in the axial direction Simultaneously, the end reflector 17 realizes beam feeding and scanning in the form of spin motion.

Positive effects of the present invention: the biggest advantage of this structure is that while the fixed focusing lens 25 is conveniently water-cooled, the end reflector 17 is effectively air-cooled, and the cooling sprayed from the light exit hole 16 of the light tube The gas can also effectively prevent the sputtering from polluting the end reflector 17 during the quenching process, and has the dual effects of cooling and protecting the mirror. Simultaneously, the motor 22 that drives the light cylinder 18 to rotate can be selected to have a very low power, thereby greatly saving energy.

BRIEF DESCRIPTION OF THE DRAWINGS: Fig. 1 is a schematic diagram of an optical system in the prior art; Fig. 2 is a schematic structural diagram of the present invention, and Fig. 2 is used for abstract drawings.

The best embodiment: the material of housing 6, supporting plate 11 and light tube 18 adopts lighter aluminum alloy with good thermal conductivity, the material of end reflector 17 adopts molybdenum mirror, focusing lens 25 adopts zinc selenide coating, screw rod 8 Adopt ball screw rod to pay and cooperate with screw nut 9.

Claims (1)

1, a kind of light beam rotating feed mechanism that is used for hole laser quenching, be by housing, feed system, the optics rotational system is formed, it is characterized in that condenser lens (25) is contained on the supporting plate hole, a left side (14) of supporting plate (11), the condenser lens that has water-cooling channel that is pressed on the condenser lens (25) presses frame (24) and supporting plate (11) to locate to use thread connection in supporting plate hole, a left side (14), condenser lens (25) keeps relative transfixion on the position in supporting plate hole, a left side (14), condenser lens (25) and the relative distance that is contained between the interior end reflector (17) of light tube (18) are constant, the axle and driving toothed gear (20) rigid attachment of motor (22), driving toothed gear (20) and follower gear (19) the tooth engagement that is rigidly fixed on the light tube (18).

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