Automatic welding machine welding gun device

Abstract

The utility model provides a welding gun device for an automatic welding machine, and the utility model relates to the technical field of numerical control machining, comprising a machine frame and a handle frame, the handle frame being fixed at one end of the machine frame, a pipe handle seat being inserted at one end of the machine frame relative to the handle frame, a heating core being extended at the outer end of the pipe handle seat, a protective tube being arranged in contact with the outer shell of the heating core, and a welding gun head being arranged through the end of the protective tube relative to the heating core; the beneficial effects of the utility model are as follows: considering the problem of residual gas accumulation in the existing welding gun gas supply pipeline, the heating core and the welding gun head structure are connected by a transfer tube arranged in the pipeline, the position of the transfer tube and the core shaft tube is compressed and driven by the change of the inner cavity air pressure after the gas in the gas path expands, and the heating core and the transfer tube are connected by the core shaft tube and the one-way valve pipe heads at both ends, so as to avoid the backflow of the residual gas in the gas path and the convection of the subsequent supply gas.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control processing, and relates to a welding gun device of an automatic welding machine. Background Art

[0002] The welding gun is one of the main equipment for hot air welding. It is composed of a heating element, a nozzle, etc. According to its structure, it can be divided into gas welding guns, electric welding guns, fast welding guns, and automatic welding guns. The gas welding gun uses the combustion of combustible gas (a mixture of hydrogen or acetylene and air) to heat the coil so that the compressed air sent into the coil is heated to the required temperature. The amount of air sent in or out is adjusted by the valve.

[0003] The welding gun device of the existing automatic welding machine usually adopts automatic gas supply to adjust the welding gap by opening and closing the gas circuit during automatic welding. However, in the actual welding process, there is often a certain amount of residual combustible gas in the pipeline from the pipeline to the nozzle. As the welding operation continues, the residual gas will to a certain extent cause the subsequent small amount of gas supplied to stagnate and cause large weld defects, limiting the welding effect during connection welding. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a welding gun device for an automatic welding machine is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] A welding gun device for an automatic welding machine comprises a frame and a handle frame, wherein the handle frame is fixed at one end of the frame, a pipe handle seat is inserted at one end of the frame relative to the handle frame, a heating core is extended at the outer end of the pipe handle seat, a protective tube is connected to the outer surface of the heating core, and a welding gun head is penetrated at one end of the protective tube relative to the heating core;

[0007] A transfer tube is arranged through the connecting end of the protection tube and the heating core, a ring handle rail frame is slidably fitted between the transfer tube and the tube wall of the protection tube, and a core shaft tube is arranged through the transfer tube, both ends of the core shaft tube are arranged through one-way valve tube heads, and the two ends of the core shaft tube are respectively connected to the heating core and the welding gun head.

[0008] Furthermore, a motor seat connected to the pipe handle seat is arranged in the frame, and a connected impeller chamber is arranged at the inner end of the motor seat toward the pipe handle seat, and the impeller chamber is externally connected to an air valve pipe.

[0009] Furthermore, the heating core is a ceramic tube electric heating core, and the heating core is interconnected with the impeller chamber.

[0010] Furthermore, the ring-handle rail frame is an annular frame body with an inwardly concave cross-section, and the outer end of the transfer tube is interference-fitted with the inner ring of the ring-handle rail frame.

[0011] Furthermore, a sealing pipe head is provided through the connecting end between the heating core and the core shaft tube.

[0012] Furthermore, a mica tube connected to the core shaft tube is clamped in the welding gun head.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] This automatic welding machine welding gun device takes into account the problem of residual gas accumulation in the existing welding gun gas supply pipeline, connects the heating core and the welding gun head structure through a transfer tube arranged in the pipeline, utilizes the change in the inner cavity air pressure after the gas in the gas path expands to compress and drive the position of the transfer tube and the core shaft tube, and utilizes the core shaft tube and the one-way valve pipe heads at both ends to connect the heating core and the transfer tube, so as to avoid the backflow of residual gas in the gas path and the convection of subsequent supply gas, which affect the welding welds, and the storage transfer of the coordinated transfer tube is used to mix the subsequent supply gas and the residual gas, so as to effectively avoid their influence on the welding effect, thereby improving the practicality of the welding gun device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall internal planar structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal planar structure of the transfer tube of the utility model.

[0018] Markings in the figure: 1-frame; 2-handle seat; 3-protection tube; 4-welding gun head; 5-handle frame; 6-motor seat; 7-valve pipe; 8-impeller chamber; 9-heating core; 10-transfer pipe; 11-ring handle rail frame; 12-mica tube; 13-core shaft tube; 14-check valve pipe head; 15-sealing pipe head. DETAILED DESCRIPTION

[0019] See also Figure 1-3 , the embodiments of the utility model are further described;

[0020] A welding gun device for an automatic welding machine comprises a frame 1 and a handle frame 5, wherein the handle frame 5 is fixed at one end of the frame 1, a pipe handle seat 2 is inserted into the end of the frame 1 opposite to the handle frame 5, a heating core 9 is extended from the outer end of the pipe handle seat 2, a protective tube 3 is connected to the outer surface of the heating core 9, and a welding gun head 4 is penetrated and arranged at one end of the protective tube 3 opposite to the heating core 9;

[0021] A transfer tube 10 is provided through the connecting end of the protection tube 3 and the heating core 9, and a ring handle rail frame 11 is slidably fitted between the transfer tube 10 and the tube wall of the protection tube 3, and a core shaft tube 13 is provided through the transfer tube 10, and both ends of the core shaft tube 13 are provided with a one-way valve pipe head 14, and the two ends of the core shaft tube 13 are respectively connected to the heating core 9 and the welding gun head 4.

[0022] The welding gun device uses the connected frame 1 and handle frame 5 as the gun body structure, and the outwardly extended end of the handle frame 5 serves as the clamping and fixing end of the welding machine. Compared with the existing welding gun structure, the device mainly transfers the residual gas in the welding gun head 4 through the transfer tube 10 arranged between the heating core 9 and the welding gun head 4. The filling of the gas in the transfer tube 10 will force the transfer tube 0 to move axially along the ring handle rail frame 11, and continuously compress the relative pipeline length between the two ends of the core shaft tube 13 relative to the heating core 9 and the welding gun head 4. At the same time, the one-way valve pipe head 14 is used to limit the residual gas filled into the transfer tube 10 to flow back to the core shaft tube 13 and convect with the subsequent supply gas, which affects the supply gas path rate. The relatively shortened core shaft tube 13 gas path and the enlarged transfer tube 10 tube warehouse will make the subsequent filling gas and the residual gas mixed and output, thereby maintaining the supply gas path pressure of the supply gas stable, so as to ensure the overall rate of gas output to the welding gun head 4 and ensure the welding effect.

[0023] Compared with the traditional welding gun gas path structure, the movable telescopic structure of the transfer tube 10 and the core shaft tube 13 can be used to avoid the situation where residual gas is retained in the subsequent gas supply, thereby improving the practicality and welding effect of the welding gun device.

[0024] On the basis of the above, a motor seat 6 connected to the pipe handle seat 2 is provided in the frame 1, and a connected impeller compartment 8 is provided at the inner end of the motor seat 6 toward the pipe handle seat 2, and the impeller compartment 8 is externally connected to the gas valve pipe 7. The welding gun device is based on the existing welding gun gas supply method, and mainly drives the impeller arranged in the impeller compartment 8 to rotate through the motor seat 6, and fills the heating core 9 with combustible gas through the gas source externally connected to the gas valve pipe 7.

[0025] Preferably, the heating core 9 is a ceramic tube electric heating core, and the heating core 9 is interconnected with the impeller chamber 8. When the ceramic tube electric heating core is adapted to the transfer pipe 10 to transport the gas path, the heating efficiency of the heating core is guaranteed to heat the combustible gas passing through.

[0026] Preferably, the ring handle rail frame 11 is an annular frame with a concave cross-section, and the outer end of the transfer tube 10 is interference fit with the inner ring of the ring handle rail frame 11, so that the ring handle rail frame 11 maintains the axial position accuracy of the transfer tube 10 during relative sliding, and the interference fit structure of the inner ring is used to limit the minimum contraction end of the ring handle rail frame 11 and the transfer tube 10.

[0027] Preferably, a sealing tube head 15 is provided at the connecting end between the heating core 9 and the core shaft tube 13. The sealing tube head 15 at the through end is adapted to the end of the one-way valve tube head 14 of the core shaft tube 13 with a relatively axial structure, so as to adapt to the axial movement of the core shaft tube 13 and the transfer tube 10 while ensuring the air tightness of the air path.

[0028] Preferably, a mica tube 12 connected to the core shaft tube 13 is clamped in the welding gun head 4, and the hard high-temperature resistant mica tube 12 head serves as the connecting structure between the welding gun head 4 and the core shaft tube 13 and the transfer tube 10 to ensure the reliability of the gas ejection end of the welding gun head 4.

[0029] The implementation method of the device is that when working, the impeller provided in the impeller compartment 8 is driven to rotate by the motor seat 6, and the combustible gas is filled into the heating core 9 by the gas source external to the gas valve pipe 7. The gas is heated by the heating core 9 and output to the mandrel tube 13, and is output to the end of the welding gun head 4 along with the mandrel tube 13 and the transfer tube 10, and is sprayed out of the welding gun head 4 for welding. The residual gas in the welding gap will continue to fill the connecting end of the transfer tube 10 and the mandrel tube 13, forcing the transfer tube 10 to retract along the ring handle rail frame 11. The gas path between the core shaft tube 13 and the transfer tube 10 is shortened to compress the relative pipeline length between the two ends of the core shaft tube 13 relative to the heating core 9 and the welding gun head 4. At the same time, the one-way valve pipe head 14 is used to limit the surplus gas filled into the transfer tube 10 to flow back into the core shaft tube 13 and convect with the subsequent supply gas, which affects the supply gas path rate. The relatively shortened core shaft tube 13 gas path and the enlarged transfer tube 10 tube warehouse will make the subsequent filling gas and the surplus gas mixed and output, thereby maintaining the supply gas path pressure of the supply gas stable.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A welding gun device for an automatic welding machine, comprising a frame (1) and a handle frame (5), wherein the handle frame (5) is fixed to one end of the frame (1), and is characterized in that: A tube handle seat (2) is inserted into one end of the frame (1) relative to the handle frame (5); a heating core (9) is extended from the outer end of the tube handle seat (2); a protective tube (3) is disposed on the outer surface of the heating core (9); and a welding gun head (4) is penetrated through one end of the protective tube (3) relative to the heating core (9); A transfer tube (10) is provided through the end where the protection tube (3) and the heating core (9) meet, a ring handle rail frame (11) is slidably fitted between the transfer tube (10) and the tube wall of the protection tube (3), and a core shaft tube (13) is provided through the transfer tube (10), both ends of the core shaft tube (13) are provided with one-way valve tube heads (14), and the two ends of the core shaft tube (13) are respectively connected to the heating core (9) and the welding gun head (4).

2. The welding gun device of an automatic welding machine according to claim 1, characterized in that: The frame (1) is provided with a motor seat (6) connected to the pipe handle seat (2), and the motor seat (6) is provided with an impeller chamber (8) connected to the inner end of the pipe handle seat (2), and the impeller chamber (8) is externally connected to an air valve pipe (7).

3. The welding gun device of an automatic welding machine according to claim 2, characterized in that: The heating core (9) is a ceramic tube type electric heating core, and the heating core (9) is interconnected with the impeller chamber (8).

4. The welding gun device of an automatic welding machine according to claim 1, characterized in that: The ring-handle rail frame (11) is an annular frame body with an inwardly concave cross section, and the outer end of the transfer tube (10) is interference-fitted with the inner ring of the ring-handle rail frame (11).

5. The welding gun device of an automatic welding machine according to claim 1, characterized in that: A sealing pipe head (15) is provided through the connection end between the heating core (9) and the core shaft tube (13).

6. The welding gun device of an automatic welding machine according to claim 1, characterized in that: A mica tube (12) connected to the core shaft tube (13) is clamped in the welding gun head (4).

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