Handheld air-cooled welding head

Abstract

The utility model relates to the technical field of laser welding, and discloses a handheld air-cooled welding head which comprises a welding machine main body shell and a front cover plate installed on the side edge of the welding machine main body shell, a PCB is installed on the side edge of the welding machine main body shell, and a switch and an indicator light are arranged on the front cover plate. A QBH assembly, a collimating mirror set and a cooling air cylinder are installed in the welding machine body shell, a PCB (printed circuit board) is installed on the welding machine body shell and covered with a front cover plate, control signals are prevented from being interfered in the transmission process, and the stability of equipment operation is improved; the spiral lines are arranged on the outer wall of the cooling air cylinder and matched with the sealing ring and the welding machine main body shell to form a sealed spiral air path structure, so that the contact area between cooling air and the equipment is increased, and the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a handheld air-cooled welding head. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a laser beam with a high energy density as a heat source. Laser welding can be achieved by using continuous or pulsed laser beams. The principle of laser welding can be divided into heat conduction welding and laser deep penetration welding. When the power density is less than 104 - 105 W / cm2, it is heat conduction welding, at this time the penetration depth is shallow and the welding speed is slow; when the power density is greater than 105 - 107 W / cm2, the metal surface is heated and dented into a "cavity" to form deep penetration welding, which has the characteristics of fast welding speed and large depth-width ratio.

[0003] After retrieval, the patent with the application number CN202210143369.2 discloses a pure air-cooled handheld laser welding machine, including a welding machine housing, a welding machine main body and an air-cooling mechanism. The welding machine main body and the air-cooling mechanism are both installed inside the welding machine housing. A control motor is installed inside the air-cooling mechanism, and the power supply end of the control motor is connected to a control circuit board through a wire. The front end of the welding machine main body is connected to a laser emission mechanism through a control clamp arm, and a temperature sensor is installed on the surface of the laser emission mechanism. The temperature sensor is electrically connected to the control circuit board through a signal. A fixed sleeve is installed at the lower end of the welding machine main body, and one end of the fixed sleeve is connected to a rotating head through a control rod. This invention has the advantages of being convenient to carry, lightweight and good in stability through the pure air-cooled design of the laser welding machine. By starting the air-cooling mechanism in time, rapid heat dissipation treatment of the laser welding machine can be achieved. At the same time, this laser welding machine is convenient for rotation adjustment and storage.

[0004] With the development of the laser welding field, the equipment is becoming more and more lightweight. Based on the original water-cooled laser welding, a handheld laser welding head using gas as a cooling medium has emerged as the times require;

[0005] The current structure of handheld laser welding equipment is not delicate enough, the volume is still relatively large, it is more laborious to use, and its internal PCB control system is vulnerable to interference during signal transmission, reducing the stability of equipment use; the cold air is transported in a direct blowing form inside the welding equipment, and the contact area between the cold air and the welding equipment is small, resulting in poor cooling effect; therefore, we need to propose a handheld air-cooled welding head. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a handheld air-cooled welding head. By installing the PCB board (PCB control system) on the outer shell of the welding machine main body and covering it with a front cover plate, interference during the transmission of control signals is avoided, and the stability of equipment operation is increased. By setting spiral threads on the outer wall of the cooling air cylinder and cooperating with a sealing ring to form a sealed spiral air path structure with the outer shell of the welding machine main body, the contact area between the cooling gas and this equipment is increased, and the cooling efficiency is improved, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: A handheld air-cooled welding head includes an outer shell of the welding machine main body and a front cover plate installed on the side of the outer shell of the welding machine main body. A PCB board is installed on the side of the outer shell of the welding machine main body. A switch and an indicator light are respectively arranged on the front cover plate. A QBH component, a collimating lens group, and a cooling air cylinder are respectively installed inside the outer shell of the welding machine main body. The collimating lens group is threadedly connected to the upper part of the QBH component, and the cooling air cylinder is sleeved on the collimating lens group;

[0008] The outer wall of the cooling air cylinder is provided with spiral threads, and both ends of the outer wall of the cooling air cylinder are hermetically installed on the inner wall of the outer shell of the welding machine main body through a sealing ring.

[0009] Preferably, an air pipe joint connected to an external air path is installed inside the front cover plate, and the air outlet end of the air pipe joint passes through the outer shell of the welding machine main body and is located inside the outer shell of the welding machine main body.

[0010] Preferably, a mounting plate is fixed at one end of the outer shell of the welding machine main body. An installation opening is provided on one side of the mounting plate. A nut is threadedly arranged on the installation opening, and a clamping block is inserted inside the installation opening. A scale tube is inserted inside the clamping block.

[0011] Preferably, two installation slots are opened at the top of the outer shell of the welding machine main body, and a focusing lens group and a protective lens group are respectively arranged inside the two installation slots.

[0012] Preferably, a motor cover is fixed at the other end of the outer shell of the welding machine main body through a long bolt. A motor is installed inside the motor cover, and one end of the output shaft of the motor is connected to a reflecting lens group.

[0013] Preferably, the switch includes a light-emitting switch and an adjustment switch. Four indicator lights are provided, and the motor is electrically connected to the PCB board.

[0014] Preferably, a horizontal through hole is opened on the outer shell of the welding machine main body, and the scale tube, the horizontal through hole, the focusing lens group, and the protective lens group are coaxially arranged.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The utility model installs the PCB board (PCB control system) on the main shell of the welding machine and covers it with a front cover, thereby avoiding interference of the control signal during transmission and increasing the stability of equipment operation;

[0017] 2. The utility model increases the contact area between the cooling gas and the equipment by arranging spiral patterns on the outer wall of the cooling gas cylinder and cooperating with the sealing ring and the main shell of the welding machine to form a sealed spiral gas path structure, thereby increasing the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is an exploded view of the utility model.

[0021] In the figure: 1. welding machine main body shell; 2. motor cover; 3. front cover; 31. switch; 32. indicator light; 4. graduation tube; 5. QBH assembly; 6. cooling cylinder; 7. motor; 8. focusing lens group; 9. protective lens group; 10. mounting plate; 11. nut; 12. air pipe joint; 13. reflector group; 14. collimator group; 15. clamping block; 16. PCB board. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 - 3 The utility model provides a technical solution: a handheld air-cooled welding head, comprising a welding machine main body shell 1, a front cover plate 3 installed on the side of the welding machine main body shell 1, the front cover plate 3 is set as a U-shaped front cover plate, a PCB board 16 is installed on the side of the welding machine main body shell 1, the PCB board 16 is used as the control system of the device, and a switch 31 and an indicator light 32 are respectively arranged on the front cover plate 3;

[0024] Inside the main body housing 1 of the welding machine, a QBH assembly 5, a collimating lens group 14, and a cooling air cylinder 6 are respectively installed. The QBH assembly 5 is a rotatable sleeve with pins inside. The collimating lens group 14 is threadedly connected to the upper part of the QBH assembly 5. The outer wall of the upper part of the QBH assembly 5 is provided with an external thread portion, and the outer wall of the lower end of the collimating lens group 14 is provided with an internal thread portion. The external thread portion and the internal thread portion are correspondingly arranged. The cooling air cylinder 6 is a cylinder with spiral threads on its outer wall, and the cooling air cylinder 6 is sleeved on the collimating lens group 14;

[0025] The outer wall of the cooling air cylinder 6 is provided with spiral threads, and both ends of the outer wall of the cooling air cylinder 6 are hermetically installed on the inner wall of the main body housing 1 of the welding machine through sealing rings.

[0026] Both ends of the outer wall of the cooling air cylinder 6 are provided with annular sealing grooves, and sealing rings are arranged inside the sealing grooves, so that the outer walls of the sealing rings abut against the inner wall of the main body housing 1 of the welding machine, forming a sealed spiral air path structure between the outer wall of the cooling air cylinder 6 and the inner wall of the main body housing 1 of the welding machine.

[0027] Inside the front cover plate 3, an air pipe joint 12 connected to an external air path is installed, which is convenient for introducing external gas into the spiral air path structure (i.e., the cooling air path). The air outlet end of the air pipe joint 12 passes through the main body housing 1 of the welding machine and is located inside the main body housing 1 of the welding machine. The air pipe joint 12 is fixed on the main body housing 1 of the welding machine.

[0028] One end of the main body housing 1 of the welding machine is fixed with a mounting plate 10. One side of the mounting plate 10 is provided with a mounting opening. A nut 11 is threadedly arranged on the mounting opening, and a clamping block 15 is inserted into the mounting opening. A scale tube 4 is inserted into the clamping block 15.

[0029] When installing the scale tube 4, insert one end of the scale tube 4 into the clamping block 15, and then turn the nut 11. While the nut 11 rotates on the mounting opening, it moves and approaches the scale tube 4. The inner wall of the nut 11 squeezes the port of the clamping block 15, causing the port of the clamping block 15 to constrict, realizing the clamping of the scale tube 4.

[0030] Two mounting grooves are opened at the top of the main body housing 1 of the welding machine. A focusing lens group 8 and a protective lens group 9 are respectively arranged inside the two mounting grooves. The focusing lens group 8 and the protective lens group 9 are fixed inside the mounting grooves by bolts.

[0031] The other end of the main body housing 1 of the welding machine is fixed with a motor cover 2 by long bolts. A motor 7 is installed inside the motor cover 2. One end of the output shaft of the motor 7 is connected with a reflecting mirror group 13. The motor 7 drives the reflecting mirror group 13 to rotate. The reflecting mirror group 13 includes a mirror frame and a reflecting mirror. The reflecting mirror is fixed on the output shaft of the motor 7 through the mirror frame.

[0032] The switch 31 includes a light-emitting switch and an adjustment switch. There are four indicator lights 32, and the motor 7 is electrically connected to the PCB board 16.

[0033] The light-emitting switch is used to control the emission of laser. Each indicator light 32 corresponds to a different preset process parameter combination. By switching different combinations through the adjustment switch, intelligent welding can be achieved. That is, through the intelligent design of the switch 31 and the indicator lights 32, rapid switching of welding parameters can be realized, and intelligent welding can be achieved.

[0034] A horizontal through-hole is opened on the main body shell 1 of the welding machine. The scale tube 4, the horizontal through-hole, the focusing lens group 8, and the protective lens group 9 are coaxially arranged. The horizontal through-hole is communicated with the spiral gas path, so that the cold cutting penetrates through the entire main body shell 1 of the welding machine.

[0035] During use, the gas pipe joint 12 is connected to the external gas path, and the QBH assembly 5 is locked on the optical fiber head of the laser. Since annular sealing grooves are opened at both ends of the outer wall of the cooling gas cylinder 6, and sealing rings are arranged inside the sealing grooves, the outer wall of the sealing ring abuts against the inner wall of the main body shell 1 of the welding machine, so that a sealed spiral gas path structure is formed between the outer wall of the cooling gas cylinder 6 and the inner wall of the main body shell 1 of the welding machine, and the air outlet end of the gas pipe joint 12 is located inside the spiral gas path structure, which is convenient for introducing external gas into the spiral gas path structure, that is, into the cooling gas path of the welding head, increasing the contact area between the cooling gas path and the welding head and improving the cooling efficiency;

[0036] During laser welding, the optical fiber head of the laser emits laser, and the laser passes through the collimating lens in the collimating lens group 14 and is emitted to the reflecting mirror group 13, and the laser is reflected to the horizontal direction. The laser can then pass through the axes of the focusing lens group 8 and the protective lens group 9 and be emitted from the scale tube 4 to realize laser welding of the workpiece.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A handheld air-cooled welding head, characterized in that: It includes the main body housing (1) of the welding machine and the front cover plate (3) installed on the side of the main body housing (1) of the welding machine. A PCB board (16) is installed on the side of the main body housing (1) of the welding machine. A switch (31) and an indicator light (32) are respectively arranged on the front cover plate (3). Inside the main body housing (1) of the welding machine, a QBH component (5), a collimating lens group (14), and a cooling air cylinder (6) are respectively installed. The collimating lens group (14) is threadedly connected to the upper part of the QBH component (5), and the cooling air cylinder (6) is sleeved on the collimating lens group (14). The outer wall of the cooling air cylinder (6) is provided with spiral threads, and both ends of the outer wall of the cooling air cylinder (6) are hermetically installed on the inner wall of the main body housing (1) of the welding machine through sealing rings.

2. The hand-held air-cooled welding head according to claim 1, characterized in that: Inside the front cover plate (3), an air pipe joint (12) connected to an external air circuit is installed. The air outlet end of the air pipe joint (12) passes through the main body housing (1) of the welding machine and is located inside the main body housing (1) of the welding machine.

3. The hand-held air-cooled welding head according to claim 1, wherein: One end of the main body housing (1) of the welding machine is fixed with a mounting plate (10). An installation opening is arranged on one side of the mounting plate (10). A nut (11) is threadedly arranged on the installation opening, and a clamping block (15) is inserted inside the installation opening. A graduated tube (4) is inserted inside the clamping block (15).

4. The hand-held air-cooled welding head according to claim 3, characterized in that: Two installation slots are opened at the top of the main body housing (1) of the welding machine. A focusing lens group (8) and a protective lens group (9) are respectively arranged inside the two installation slots.

5. The hand-held air-cooled welding head according to claim 4, characterized in that: The other end of the main body housing (1) of the welding machine is fixed with a motor cover (2) through long bolts. A motor (7) is installed inside the motor cover (2), and one end of the output shaft of the motor (7) is connected to a reflecting mirror group (13).

6. The hand-held air-cooled welding head according to claim 5, wherein: The switch (31) includes a light-emitting switch and an adjustment switch. Four indicator lights (32) are provided. The motor (7) is electrically connected to the PCB board (16).

7. A handheld air-cooled welding head according to claim 6, characterized in that: A horizontal through-hole is opened on the main body housing (1) of the welding machine. The graduated tube (4), the horizontal through-hole, the focusing lens group (8), and the protective lens group (9) are coaxially arranged.

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