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A controllable flow powder feeder for plasma spray gun

A technology of plasma and powder feeder, which is applied in the direction of plasma welding equipment, welding equipment, metal processing equipment, etc., can solve the problems that the plasma spray welding layer cannot be formed, the quality dilution rate of the spray welding layer is affected, and the plasma spray welding torch is damaged. The structure is simple, the service life is long, and the effect of improving the uniformity and grade

Active Publication Date: 2017-12-05
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of plasma spray welding, the spray welding parameters are pre-set. If the amount of powder (powder flow rate) entering the spray welding torch per unit time is unstable or cannot be accurately controlled, it will directly affect the quality of the spray welding layer (spray welding layer The thickness, dilution rate and surface smoothness of the spray welding layer, etc.), damage the plasma spray welding torch, and even cannot form a complete plasma spray welding layer, and cannot be used for industrial production

Method used

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  • A controllable flow powder feeder for plasma spray gun
  • A controllable flow powder feeder for plasma spray gun
  • A controllable flow powder feeder for plasma spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: It is required to spray an iron-based spray welding layer with a thickness of 2 mm on a workpiece surface of 200 mm × 300 mm,

[0031] Spray welding operation:

[0032] 1. Fix the workpiece to be welded;

[0033] 2. Inject an appropriate amount of spray welding powder through the feed port;

[0034] 3. Select the inner diameter of the blanking nozzle as 1mm

[0035] 4. Choose to set the powder feeding flow rate of the powder feeder of this design:

[0036] According to Table 1, select the gap between the mouth of the blanking nozzle and the drum to be 3mm, and the drum speed to be 20r / min;

[0037] 5. Connect the controllable flow powder feeder to the welding gun;

[0038] 6. Set relevant plasma spray welding process parameters;

[0039] 7. Start the plasma spray welding equipment. According to the above parameter selection, the plasma spray welding can be carried out according to the powder feeding rate of 28.06g / min. The operator can obtain a spray we...

Embodiment 2

[0040] Embodiment 2: require on the workpiece surface of 400 millimeters * 600 millimeters, the nickel-based spray-welding layer of 3 millimeters of thickness is spray-welded,

[0041] Spray welding operation:

[0042] 1. Fix the workpiece to be welded;

[0043] 2. Inject an appropriate amount of spray welding powder through the feed port;

[0044] 3. Select the inner diameter of the blanking nozzle as 3mm

[0045] 4. Choose to set the powder feeding flow rate of the powder feeder of this design:

[0046] According to Table 2, select the gap between the mouth of the blanking nozzle and the drum to be 4mm, and the drum speed to be 40r / min;

[0047] 5. Connect the controllable flow powder feeder to the spray gun.

[0048] 6. Set relevant plasma spray welding process parameters;

[0049] 7. Start the plasma spray welding equipment. According to the above parameter selection, the plasma spray welding can be carried out at a powder feeding rate of 100.01g / min. The operator can...

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Abstract

The invention relates to a flow-controllable powder feeder for a plasma spraying welding gun, and belongs to the field of plasma spraying welding tool equipment. The flow-controllable powder feeder comprises a powder bin, conveying barrels, a connecting base, a base and a control system; a discharging nozzle at the lower end of the powder bin vertically penetrates the connecting base to enter inner cavities of the conveying barrels, and each conveying barrel is composed of a feeding adjustor and a drum conveyor; and the conveying barrels are correspondingly arranged in an inner cavity of a barrel up and down. On one hand, the feeding adjustor drives the discharging nozzle to spirally and vertically move so as to adjust a gap between a nozzle opening of the discharging nozzle and a drum of the drum conveyor under the discharging nozzle; and on the other hand, the drum conveyor controls the rotating speed of the drum so as to control the conveying speed of powder falling to the drum face from the discharging nozzle, falling off in a rotating manner and passing through a discharging opening, so that powder flow control is achieved. The flow-controllable powder feeder is accurate in control, the powder feeding continuity is good, the spraying welding layers are even, follow-up machining of the spraying welding layers is reduced to the maximum degree, waste of dusty materials is effectively avoided, and equipment guarantees are provided for the uniformity and the grade of the spraying welding layers.

Description

technical field [0001] The invention relates to a flow-controllable powder feeder for a plasma spray welding torch, which belongs to the field of plasma spray welding tooling equipment. Background technique [0002] The feeder is a machine used to convey materials and is an important transmission equipment in industrial production. With the development of metal material surface modification technology, the application of plasma spray welding technology in industry is becoming more and more extensive, and the feeder of plasma spray welding gun plays a very important role in this technology. In the process of plasma spray welding, the spray welding parameters are pre-set. If the amount of powder (powder flow rate) entering the spray welding torch per unit time is unstable or cannot be accurately controlled, it will directly affect the quality of the spray welding layer (spray welding layer The thickness, dilution rate and surface smoothness of the spray welding layer, etc.), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K10/02
CPCB23K10/02
Inventor 童向阳陈同舟袁振南张岩余斯亮
Owner WUHAN RES INST OF MATERIALS PROTECTION
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