A punch PTA welding process

Abstract

The present invention relates to the technical field of welding processes, and discloses a punch PTA welding process, which includes the following steps: Install multiple groups of objects to be welded on a workpiece tray, and position the multiple groups of objects with mechanical claws for grasping the workpiece. Align the mechanical claws with a group of objects, lower the mechanical claws and open them, control the mechanical claws to close to clamp the objects after the mechanical claws wrap the objects, flip the mechanical claws to make the objects face upward, expand the mechanical claws to make the objects fall naturally, expand the mechanical claws again after closing the mechanical claws to clamp the objects, and ensure that the workpiece is firmly clamped after closing the mechanical claws again. In this punch PTA welding process, the punch is fusion welded by adopting a new plasma arc (PTA) technology, so that the punch and the base material are perfectly fused without any cracks, and the service life of the punch is extended, the heat resistance and hardness of the punch are enhanced, and the quality of punch manufacturing is improved while ensuring the punch production capacity, which is suitable for popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of welding processes, and specifically to a PTA welding process for a punch. Background Art

[0002] The lightweighting of glass bottles and jars is beneficial to glass factories, bottling plants, and society in terms of energy conservation, emission reduction, increased production capacity, improved quality, and convenient storage and transportation. It is becoming increasingly popular in the industry. The most advanced forming process for lightweight bottles and jars is the "narrow neck press and blow method". The biggest difference in the mold between the narrow neck press and blow method and the usual "blow and blow" method is that the core is changed to a punch. Due to its thin and long diameter and long contact time with the glass liquid, the narrow neck press and blow punch has extremely high requirements for its high temperature resistance, oxidation resistance, anti-deformation and other characteristics. Most of the punches used in China are imported tungsten carbide punches from abroad at present. However, their long procurement time and high price result in a mismatch with the domestic market. Moreover, the existing supersonic spray-welded tungsten carbide punches are prone to causing cracks in the base material, thus affecting the service life and heat-resistant hardness of the punch. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the present invention provides a PTA welding process for a punch, which has the advantages of high hardness and long service time when used on a machine, and solves the problems of short service life and poor heat-resistant hardness.

[0005] (II) Technical Solutions

[0006] To achieve the above-mentioned purpose of high hardness, long service time when used on a machine, and easy maintenance, the present invention provides the following technical solutions: A PTA welding process for a punch, comprising the following steps:

[0007] Step 1: Install multiple groups of objects to be welded on a workpiece tray, and then use a mechanical claw for grasping the workpiece to position the multiple groups of objects.

[0008] Step 2: Align the mechanical claw with a group of objects, then lower the mechanical claw and open it. After the mechanical claw wraps the object, control the mechanical claw to close to clamp the object. Then flip the mechanical claw to make the object face upwards, and then expand the mechanical claw to make the object fall naturally. After closing the mechanical claw to clamp the object, expand the mechanical claw again. After closing the mechanical claw again, it can be ensured that the workpiece is firmly clamped.

[0009] Step 3: Rotate the mechanical claw again to make the object horizontal, and then drive the mechanical claw to move left by a crawler conveyor device. When the outside of the object is aligned with the welding torch nozzle, start the servo motor to drive the metal powder in the powder tank to the welding torch nozzle to generate a plasma arc of 3000°C to melt the powder for spray welding. At the same time, slowly rotate the mechanical claw to melt-weld the outer ring of the object.

[0010] Step 4: After the outer ring of the object is welded, move the mechanical claw to separate the object from the welding torch. Then, rotate the mechanical claw again to allow the object to cool naturally. After cooling, turn the mechanical claw over so that the object faces upward. Then, move the mechanical claw through the crawler conveyor to make the top of the object contact the welding torch nozzle. After slowly rotating the mechanical claw, the object can be welded.

[0011] Step 5: After the object is welded, reverse the mechanical claw to place the object horizontally to the right. Then, move the mechanical claw above the discharge port through the crawler conveyor. After loosening the mechanical claw, the object can fall into the discharge port, completing the welding operation of the object.

[0012] Preferably, the outer circle of the plasma arc is protected and pressurized with an inert gas of argon as the shielding gas.

[0013] Preferably, the crawler conveyor is a common crawler conveyor equipment in the market, which is composed of a rotating motor, a reducer, a roller, a bracket, a idler, a conveyor belt and a counterweight.

[0014] Preferably, a pneumatic valve is provided at the discharge port. After a set of objects is unloaded by the mechanical claw, the pneumatic valve needs to be opened to clean with gas, and then the next set of objects can be clamped.

[0015] Preferably, the powder tank and the servo motor are arranged at the top of the welding torch and the nozzle, and the powder tank and the welding torch nozzle are communicated with each other.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a punch PTA welding process, which has the following beneficial effects:

[0018] 1. In this punch PTA welding process, the punch is welded by adopting a new plasma arc (PTA) technology, so that the punch and the base material are perfectly fused without any cracks, and the service life of the punch is extended, the heat resistance and hardness of the punch are enhanced, and the quality of punch manufacturing is improved while ensuring the punch production capacity, which is suitable for popularization.

[0019] 2. In this punch PTA welding process, by adopting automated equipment, the work burden of the operator is reduced, the production cost is reduced, the welding efficiency is improved while ensuring the quality of the object, which provides convenience for the work of the operator and is suitable for popularization. Description of the Drawings

[0020] Figure 1 This is the process flow chart. Detailed Embodiment

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please refer to Figure 1 , a punch PTA welding process, comprising the following steps:

[0023] Step 1: Install multiple groups of objects to be welded on the workpiece tray, and then use the mechanical claws used to grab the workpieces to position the multiple groups of objects.

[0024] Step 2: Aim the mechanical claw at a group of objects, then move the mechanical claw down and open it. After the mechanical claw wraps the object, control the mechanical claw to close and clamp the object, then flip the mechanical claw so that the object is facing upward, and then unfold the mechanical claw to let the object fall naturally. After closing the mechanical claw to clamp the object, unfold the mechanical claw again, and after closing the mechanical claw again, it can be ensured that the workpiece is firmly clamped.

[0025] Step 3: Turn the mechanical claw again to make the object horizontal, and then use the crawler conveyor to drive the mechanical claw to move left. When the outer side of the object is aligned with the welding gun nozzle, turn on the servo motor to drive the metal powder in the welding powder tank to the welding gun nozzle to generate a 3000℃ plasma arc to melt the welding powder for spray welding. At the same time, slowly rotate the mechanical claw to melt the outer circle of the object.

[0026] Step 4: After the outer ring of the object is welded, move the mechanical claw to separate the object from the welding gun, and then turn the mechanical claw again to allow the object to cool naturally. After cooling, turn the mechanical claw over so that the object faces upward, and then move the mechanical claw through the crawler conveyor to make the top of the object contact with the welding gun nozzle. Slowly turn the mechanical claw to allow the object to be welded.

[0027] Step 5: After the object is welded, reverse the mechanical claw to place the object horizontally to the right, and then move the mechanical claw to the top of the discharge port through the crawler conveyor. After releasing the mechanical claw, the object can fall to the discharge port, completing the welding operation of the object.

[0028] In the present invention, the outer ring of the plasma arc is an inert gas such as argon gas and is used as a protective gas for protection and pressurization.

[0029] In the present invention, the crawler conveyor device is a common crawler conveyor equipment on the market, which is composed of a rotating motor, a reducer, a roller, a bracket, a roller, a conveyor belt and a counterweight.

[0030] In the present invention, a pneumatic valve is provided at the discharge port. After a set of objects is unloaded by the mechanical claw, the pneumatic valve needs to be opened to use gas for cleaning, and then the next set of objects is clamped.

[0031] In the present invention, the powder can and the servo motor are arranged at the top of the welding torch and the nozzle, and the powder can and the welding torch nozzle are in communication with each other.

[0032] The punch PTA welding process uses a new plasma arc (PTA) technology to perform fusion welding on the punch, so that the punch and the base material are perfectly fused without any cracks, and the service life of the punch is extended. Referring to the data comparison chart, the service life data of the punch produced by this process is obtained through experiments, enhancing the heat resistance and hardness of the punch, improving the quality of punch manufacturing while ensuring the punch production capacity, and is suitable for promotion.

[0033] The punch PTA welding process uses automated equipment, reducing the workload of operators, lowering production costs while ensuring the quality of objects, improving the working efficiency of fusion welding, providing convenience for the work of operators, and is suitable for promotion.

[0034] Process Name Supersonic Process Plasma Transferred Arc (PTA) Process Service Life 92 hours 275 hours

[0035] (Data comparison chart)

[0036] The electrical components appearing in this article are all electrically connected to an external main controller and 220V mains power, and the main controller can be a conventional known device such as a computer for control.

[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 principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punch PTA welding process, characterized in that, It includes the following steps: Step 1: Install multiple groups of objects to be welded on the workpiece tray, and then use the mechanical jaws for grasping the workpiece to position the multiple groups of objects; Step 2: Align the mechanical jaws with a group of objects, then lower the mechanical jaws and open them. After the mechanical jaws wrap around the objects, control the mechanical jaws to close to clamp the objects, then flip the mechanical jaws to make the objects face upward, then expand the mechanical jaws to let the objects fall naturally. After closing the mechanical jaws to clamp the objects again, expand the mechanical jaws again. After closing the mechanical jaws again, it can ensure that the workpiece is firmly clamped; Step 3: Rotate the mechanical jaws again to make the objects horizontal, and then drive the mechanical jaws to move leftward by the track conveyor device. When the outer side of the objects is aligned with the welding gun nozzle, start the servo motor to send the metal powder in the powder tank to the welding gun nozzle to generate a plasma arc of 3000°C to melt the powder for spray welding, and at the same time slowly rotate the mechanical jaws to melt-weld the outer ring of the objects; Step 4: After the outer ring of the objects is melt-welded, move the mechanical jaws to make the objects separate from the welding gun, and then rotate the mechanical jaws again to let the objects cool naturally. After cooling, flip the mechanical jaws to make the objects face upward, and then move the mechanical jaws by the track conveyor device to make the top of the objects contact the welding gun nozzle. After slowly rotating the mechanical jaws, the objects can be melt-welded; Step 5: After the objects are melt-welded, reverse the mechanical jaws to place the objects horizontally to the right, and then move the mechanical jaws to above the discharge port by the track conveyor device. After loosening the mechanical jaws, the objects can fall into the discharge port to complete the melt-welding operation of the objects.

2. The punch PTA welding process according to claim 1, characterized in that: The outer circle of the plasma arc is protected and pressurized with inert gas of argon as the shielding gas.

3. A punch PTA welding process according to claim 1, characterized in that: The track conveyor device is a common track conveyor equipment in the market, which is composed of a rotating motor, a reducer, a roller, a bracket, a supporting roller, a conveyor belt and a counterweight.

4. A punch PTA welding process according to claim 1, characterized in that: A pneumatic valve is arranged at the discharge port. After the mechanical jaws unload a group of objects, the pneumatic valve needs to be opened to use gas for cleaning, and then clamp the next group of objects.

5. A punch PTA welding process according to claim 1, characterized in that: The powder tank and the servo motor are arranged on the top of the welding gun and the nozzle, and the powder tank and the welding gun nozzle are interconnected.

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