CN111761222A

CN111761222A - Laser welding machine for welding safe box

Info

Publication number: CN111761222A
Application number: CN202010515367.2A
Authority: CN
Inventors: 何兴国
Original assignee: Guohong Laser Technology Jiangsu Co ltd
Current assignee: Guohong Laser Technology Jiangsu Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2020-10-13

Abstract

The invention introduces a laser welding machine, which belongs to the field of laser welding and comprises a rack, a workbench, a laser welding manipulator and a control system, wherein the workbench and the laser welding manipulator are arranged on the rack, and the control system is used for realizing laser welding on a safe box; the rack is provided with a mechanical cabinet, a stepping motor and a worm gear are fixedly arranged in the mechanical cabinet, the stepping motor transmits power to the worm gear through a chain wheel and a chain, and the output end of the worm gear drives the rotating platform to rotate to a position required by work; the laser welding manipulator includes: the device comprises a bracket, ball screws in horizontal, horizontal and vertical directions, a clamping piece and a laser welding gun; a servo motor is arranged on the horizontal and transverse ball screw, and a left motor and a right motor are arranged on the left side and the right side of the top end of the vertical ball screw; the laser welding gun can move horizontally, longitudinally and vertically through the synergistic effect of the ball screws in the horizontal, horizontal and vertical directions. The invention fundamentally improves the welding quality of the safe box.

Description

Laser welding machine for welding safe box

Technical Field

The invention relates to a laser welding machine, in particular to a laser welding machine, and belongs to the field of laser welding.

Background

With the rapid development of economy, many people have more money and buy gold, silverware or valuable documents. The storage of such valuables as property cards is problematic and most people choose to store them in a safe. Of course, the quality requirements for the safe are also high. The high-grade safe box has the functions of fire prevention, theft prevention and moisture prevention, but the later-stage rusting and corrosion, fire resistance and moisture resistance are caused by the fact that welding seams of the high-grade safe box are not tight in the manufacturing process, so that the welding process for processing the safe box needs to be improved.

Laser welding uses a laser beam with a power less than that used in cutting techniques to melt the material without vaporizing it, and after cooling becomes a continuous solid body. The laser welding has the advantages of concentrated energy density, high welding speed, small deformation, high welding quality and the like, and is widely applied, so that the applicant thinks that a laser welding machine suitable for welding the safe box is needed to be invented, the welding quality of the safe box is fundamentally improved, and the manufactured safe box is more corrosion-resistant.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art that the high-grade safe box has the effects of fire prevention, theft prevention and moisture prevention, but the welding seam of the high-grade safe box in the manufacturing process of the high-grade safe box is not tight, so that later-stage rusting and corrosion, fire resistance and moisture resistance are caused, and therefore, the welding process for processing the high-grade safe box needs to be improved. The invention aims to provide a laser welding machine which can fundamentally improve the welding quality of a safe.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A laser welding machine, especially suitable for the laser welding machine used for welding safe deposit box, including stander, work station, laser welding mechanical arm and control system, the work station and laser welding mechanical arm installed on stander, realize carrying on the laser welding to the safe box through the control system;

the machine frame is provided with a mechanical cabinet, a stepping motor and a worm gear are fixedly arranged in the mechanical cabinet, and the stepping motor and the worm gear are driven by a chain wheel and a chain; the output end of the worm gear is provided with a rotating platform, and a plurality of universal balls for assisting the rotating platform to rotate are arranged between the rotating platform and the mechanical cabinet; the stepping motor transmits power to the worm gear through a chain wheel and a chain, and the output end of the worm gear drives the rotating platform to rotate to a position required by work; the rotating platform is provided with a positioning clamping piece; the positioning clamping piece is used for clamping and fixing the safe box to be welded, so that the safe box is in the same position during welding, and the welding point is ensured to be accurate;

the laser welding manipulator includes: the device comprises a bracket, a horizontal and transverse ball screw, a horizontal and longitudinal ball screw, a vertical ball screw, a clamping piece and a laser welding gun; a bracket is arranged on the rack, and a horizontal and transverse ball screw is arranged on the bracket;

a servo motor is arranged at one end part of the horizontal and transverse ball screw, and a left motor and a right motor are respectively fixedly arranged at the left side and the right side of the top end of the vertical ball screw;

the horizontal transverse ball screw is fixedly connected with the bottom of the vertical ball screw through a nut, a screw nut on the upper portion of the vertical ball screw is connected with the end portion of the horizontal longitudinal ball screw, a clamping piece is mounted on the screw nut of the horizontal longitudinal ball screw, a laser welding gun is clamped in the clamping piece, and the laser welding gun can move in the horizontal transverse direction, the horizontal longitudinal direction and the vertical direction through the synergistic effect of the ball screws in the horizontal transverse direction and the vertical direction;

the control system comprises a position sensor arranged on the workbench, ball screws arranged in the horizontal, horizontal and vertical directions, a displacement sensor arranged in the ball screws, and a PLC (programmable logic controller) arranged on the laser welding gun, wherein the PLC is a programmable logic controller, and the PLC controls the laser welding machine to integrally coordinate and move through feedback signals of the position sensor and the displacement sensor. The position sensor arranged on the workbench is used for sensing whether the rotating platform rotates to the correct position, and the displacement sensors in the ball screws in the transverse, horizontal and vertical directions are used for sensing whether the laser welding gun reaches the accurate welding position, so that the welding quality is guaranteed.

In any of the above aspects, it is preferred that the laser welding gun comprises a gun nozzle, a gun barrel, an adjusting knob and a guard handle.

In any of the above aspects, preferably, the barrel of the laser welding gun has an arc shape of forty-five to sixty-five degrees. The barrel of the laser welding gun has a certain radian, and compared with a common linear barrel, the laser welding gun has the advantages that the gun nozzle is more flexible, and the welding position and the laser moving range are easier to control.

In any of the above schemes, preferably, the positioning and clamping member includes a pneumatic clamp, and the pneumatic clamp uses a pressure air pump to realize accurate positioning and clamping of the safe box to be welded. The pressure air pump has the advantages that when the pressure in the air pump is low, the pressure is automatically supplemented, the power source is controlled in a certain range by air pressure, great deformation of the to-be-welded safe box caused by overlarge stress is avoided, and the operation is flexible, safe and reliable.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that: according to the laser welding machine provided by the invention, as the laser welding machine has the general advantages of concentrated laser welding energy density, high welding speed, small deformation and high welding quality, the welding quality of the safe box can be fundamentally improved, and the manufactured safe box is moisture-proof, firm and corrosion-resistant.

Drawings

FIG. 1 is a schematic view of an overall structure at an angle according to an embodiment of the present invention;

FIG. 2 is a left side view of a preferred embodiment of the present invention;

fig. 3 is a top view of a preferred embodiment of the present invention.

The reference numbers in the figures illustrate:

1, a rack, 101 a mechanical cabinet, 2 a workbench, 201 a stepping motor, 202 a worm gear, 203 a rotating table, 204 a positioning clamping piece and 2041 a pneumatic clamp;

3, a laser welding manipulator, a 301 bracket, a 302 horizontal transverse ball screw, a 303 horizontal longitudinal ball screw, a 304 vertical ball screw, a 305 clamping piece and a 306 laser welding gun; 307 left motor, 308 right motor, 309 servo motor.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1 to 3, the laser welding machine for welding a safe provided by the present embodiment includes a frame 1, a workbench 2, a laser welding manipulator 3 and a control system, the workbench 2 and the laser welding manipulator 3 are mounted on the frame 1, and the laser welding of the safe is realized by the control system; the rack 1 is provided with a mechanical cabinet (101), a stepping motor 201 and a worm gear 202 are fixedly arranged in the mechanical cabinet (101), and the stepping motor 201 and the worm gear 202 are driven by a chain wheel and a chain; a rotating platform 203 is arranged at the output end of the worm gear 202, and a plurality of universal balls for assisting the rotating platform 203 to rotate are arranged between the rotating platform 203 and the mechanical cabinet (101); the stepping motor 201 transmits power to the worm gear 202 through a chain wheel and a chain, and the output end of the worm gear 202 drives the rotating platform 203 to rotate to a position required by work; the rotating platform 203 is provided with a positioning clamp 204; the positioning clamping piece 204 is used for clamping and fixing the safe box to be welded, so that the safe box is in the same position during welding, and the welding point is ensured to be accurate;

the laser welding robot 3 includes: a bracket 301, a horizontal transverse ball screw 302, a horizontal longitudinal ball screw 303, a vertical ball screw 304, a clamping piece 305 and a laser welding gun 306; a bracket 301 is arranged on the frame 1, and a horizontal transverse ball screw 302 is arranged on the bracket 301;

a servo motor 309 is installed at one end part of the horizontal and transverse ball screw 302, and a left motor 307 and a right motor 308 are respectively installed and fixed at the left side and the right side of the top end of the vertical ball screw 304;

the horizontal and transverse ball screw 302 is fixedly connected with the bottom of the vertical ball screw 304 through a nut, a screw nut on the upper part of the vertical ball screw 304 is connected with the end part of the horizontal and longitudinal ball screw 303, a clamping piece 305 is arranged on the screw nut of the horizontal and longitudinal ball screw 303, a laser welding gun 306 is clamped in the clamping piece 305, and the laser welding gun 306 moves in the three directions of horizontal and transverse directions, horizontal and longitudinal directions and vertical directions through the synergistic effect of the

ball screws

302, 303 and 304 in the three directions of horizontal and vertical directions;

the control system comprises a position sensor arranged on the workbench 2, displacement sensors arranged in the

ball screws

302, 303 and 304 in the horizontal, horizontal and vertical directions, and a PLC (programmable logic controller) arranged on the laser welding gun 306, wherein the PLC controls the whole laser welding machine to coordinate through feedback signals of the position sensor and the displacement sensors. The position sensor installed on the working table 2 is used for sensing whether the rotating table 203 rotates to a correct position, and the displacement sensors in the

ball screws

302, 303 and 304 in the horizontal direction, the vertical direction and the horizontal direction are used for sensing whether the laser welding gun 306 reaches an accurate welding position, so that the welding quality is guaranteed.

More specifically, in the present embodiment, the positioning and clamping device 204 includes a pneumatic clamp 2041, and the pneumatic clamp 2041 uses a pneumatic pump to accurately position and clamp the safe to be welded.

Example two:

referring to fig. 1 to 3, the principle of the present embodiment is similar to that of embodiment 1, which is as follows:

in this embodiment, the laser welding machine for welding the safe box provided by this embodiment includes a rack 1, a workbench 2, a laser welding manipulator 3 and a control system, the workbench 2 and the laser welding manipulator 3 are mounted on the rack 1, and laser welding is performed on the safe box through the control system;

the control system comprises a position sensor arranged on the workbench 2, the control system comprises displacement sensors arranged in

ball screws

302, 303 and 304 in the horizontal, horizontal and vertical directions, and the control system also comprises a PLC arranged on the laser welding gun 306, and the PLC controls the whole coordinated movement of the laser welding machine through feedback signals of the position sensor and the displacement sensors.

In the present embodiment, as shown in fig. 1 to 3: the laser welding gun 306 comprises a gun nozzle, a gun barrel, an adjusting knob and a protective handle; the barrel of laser torch 306 is curved at 45 to 65.

The working principle of the invention is explained as follows:

the servo motor (309) drives the horizontal and transverse ball screw (302) to rotate, and the horizontal and transverse ball screw (302) is linked with the horizontal and longitudinal ball screw (303), the vertical ball screw (304) and the laser welding gun (306) to move along the horizontal and transverse directions.

The left motor (307) drives the horizontal longitudinal ball screw (303) to move, so that the laser welding gun (306) is linked to move along the horizontal longitudinal direction.

The right motor (308) drives the vertical ball screw (304), and the vertical ball screw (304) is linked with the horizontal longitudinal ball screw (303) and the laser welding gun (306) to vertically move.

In summary, in this embodiment, according to the laser welding machine of this embodiment, the laser welding machine for welding a safe that this embodiment provided is suitable for being used for welding the safe, fundamentally improves the welding quality of the safe for the safe made is dampproofing firm, corrosion-resistant.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A laser welding machine for welding a safe box comprises a rack (1), a workbench (2), a laser welding manipulator (3) and a control system, wherein the workbench (2) and the laser welding manipulator (3) are arranged on the rack (1), and the laser welding of the safe box is realized through the control system; the method is characterized in that:

the rack (1) is provided with a mechanical cabinet (101), a stepping motor (201) and a worm gear (202) are fixedly arranged in the mechanical cabinet (101), and the stepping motor (201) and the worm gear (202) are driven by a chain wheel and a chain; a rotating platform (203) is arranged at the output end of the worm gear (202), and a plurality of universal balls for assisting the rotating platform (203) to rotate are arranged between the rotating platform (203) and the mechanical cabinet (101); the stepping motor (201) transmits power to the worm gear (202) through a chain wheel and a chain, and the output end of the worm gear (202) drives the rotating platform (203) to rotate (to a position required by work); a positioning clamping piece (204) is arranged on the rotating platform (203);

the laser welding robot (3) comprises: the welding device comprises a bracket (301), a horizontal transverse ball screw (302), a horizontal longitudinal ball screw (303), a vertical ball screw (304), a clamping piece (305) and a laser welding gun (306); a bracket (301) is installed on the rack (1), and a horizontal transverse ball screw (302) is installed on the bracket (301);

a servo motor (309) is installed at one end part of the horizontal and transverse ball screw (302), and a left motor (307) and a right motor (308) are respectively installed and fixed at the left side and the right side of the top end of the vertical ball screw (304);

the horizontal transverse ball screw (302) is fixedly connected with the bottom of the vertical ball screw (304) through a nut, a screw nut on the upper portion of the vertical ball screw (304) is connected with the end portion of the horizontal longitudinal ball screw (303), a clamping piece (305) is installed on the screw nut of the horizontal longitudinal ball screw (303), a laser welding gun (306) is clamped in the clamping piece (305), and the laser welding gun (306) moves horizontally, longitudinally and vertically through the synergistic effect of the ball screws (302, 303 and 304) in the horizontal, horizontal and vertical directions;

the control system comprises a position sensor arranged on the workbench (2), displacement sensors arranged in ball screws (302, 303 and 304) in the horizontal, horizontal and vertical directions and a PLC (programmable logic controller) arranged on the laser welding gun (306), wherein the PLC controls the laser welding machine to integrally coordinate through feedback signals of the position sensor and the displacement sensors.

2. A laser welder for welding safes according to claim 1, characterized in that: the laser welding gun (306) includes a muzzle, a barrel, an adjustment knob, and a guard handle.

3. A laser welder for welding safes according to claim 2, characterized in that: the barrel of the laser welding gun (306) is in an arc shape of 45-65 degrees.

4. A laser welder for welding safes according to any one of claims 1 to 3, characterized in that: the positioning and clamping piece (204) comprises a pneumatic clamp (2041), and the pneumatic clamp (2041) realizes accurate positioning and clamping of the safe box to be welded by using a pressure air pump.