Welding process requirements for caster support
In the production of Hanke casters, the welding process is summarized as follows by combining

practice and theory:

1. Process
1.1. The welder must pass the corresponding test piece according to the "test rules" before welding

the caster support on the post.

1.2. It is forbidden to ignite arc, test current or welding temporary supports on the surface of the

weldment.

1.3. The argon arc welding handle and argon pressure reducing flowmeter used by the welder shall

be checked frequently to ensure that the argon is in laminar flow state when the argon arc welding

is sealed.

1.4. Before the interface, the oil, paint, scale and rust on the groove surface and the inner and outer

walls of the base metal shall be cleaned until it gives metallic luster. The cleaning range is 10-15mm

on each side, and the butt clearance is 2.5 ~ 3.5mm.

1.5. The interface gap shall be uniform and straight, and strong alignment is prohibited. The staggered

value shall be less than 10% of the wall thickness and no more than 1mm.

1.6. When the local gap of the interface is too large, it shall be repaired, and it is strictly prohibited to

add plugs in the gap.

1.7. After the interface is qualified, 4-5 points shall be selected according to the different length of the

interface. The materials for spot welding shall be the same as those for formal welding. The spot welding

length is 10-15mm and the thickness is 3-4mm.

1.8. After priming, carefully check the quality of priming weld, and conduct argon arc welding of cover

caster support after it is confirmed to be qualified.

1.9 arc striking and arc stopping must be carried out in the interface. Arc stopping shall fill the molten

pool, lead the arc to the groove and extinguish the arc.

1.10. Defects in spot welding, argon arc welding and cover welding must be removed by electric grinding

tools before welding. Repeated melting method is not allowed to eliminate defects.

1.11. Attention shall be paid to the quality of joints and arc stopping, the fusion of joints shall be good,

and the molten pool shall be filled during arc stopping. To ensure weld tightness.

1.12. The slag andspatter on the weld surface shall be cleaned in time after the covering is completed.

2. Quality standard:
2.1. The quality shall be inspected according to Q / zb74-73 general technical conditions for caster

support welding and the standard of stainless steel caster support welded pipe for mechanical

structure (GB / t12770-2002).

2.2. Defect types, cause analysis and improvement methods
Causes and prevention of defects in welding of caster support by argon arc welding
Causes of weld defects prevention methods: gas hole argon is impure, gas pipe is broken, or gas

path has water, strike tungsten electrode, metal smoke and dust transition to molten pool, replace

pure spot gas, check gas path, repair or replace tungsten electrode, clean the weld, poor penetration,

weld beading, uneven welding speed, unskilled technology, strong basic skill training, uniform welding

speed, serious black ash oxidation of weld, small argon flow and slow welding speed, If the temperature

is high or the current is large, increase the gas flow at the point, speed up the welding speed, or

appropriately reduce the current shrinkage. The arc stopping method is improper. The arc stopping

suddenly stops to change the arc stopping method. The method of increasing the welding speed is

used to stop the crack caster support. The welding temperature is high or low, the penetration is poor

or overburned to ensure full penetration. The current and welding speed shall be appropriate.

Change the arc stopping position, incomplete penetration and fast welding speed, If the current is

small, slow down the welding speed of caster support or increase the current, the fusion is not good,

the angle of welding gun is incorrect, or the welding speed is fast, the current is small, improve the

error of matching, master the angle of welding gun, appropriately slow down the welding speed and

increase the current, burn through the unskilled technology, reduce the current or accelerate the

welding speed if the current is large or slow, and strengthen the basic skill training, and the arc

striking on the weld surface is inaccurate, If the ground wire is not in good contact, the arc striking

shall be accurate, and it is not allowed to strike an arc on the surface of the weldment. When the

ground wire is connected with the weld, the tungsten electrode shall be clamped with tungsten and

hit the tungsten electrode. When the tungsten electrode is in contact with the weldment, there shall

be a certain distance between the tungsten electrode and the workpiece. The weld formation is not

neat, the gun speed is uneven, the wire feeding speed is uneven, the welding speed and wire feeding

shall be uniform. More basic skill training shall be strengthened, the angle of the undercut welding

gun is incorrect, and the temperature of the, Unreasonable adjustment of welding torch angle for

feeding welding wire to achieve uniform molten pool temperature. Pay attention to the position, time

and speed of feeding welding wire.

Outdoor Caster Wheels Parameter

Outdoor Caster Wheels Describe

Outdoor Caster Wheels Size

Outdoor Caster Wheels Material

Outdoor Caster Wheels Scope of application

Application.

About us.

KTC.

The company is headquartered in the Shunyi District Niushan Industrial Zone, Beijing ,The company adopts advanced international production testing equipment and professional intelligent production management system and professional process flow,Current production KT Casters（KT CASTER）,KT Adjusting foot（KT FOOT）High quality products such as multi function,High quality horizontal adjustment of the casters,Shock proof casters,High load casters ,The adjusted feet are widely used in the world's advanced automation equipment and semiconductor equipment and other industries. The company is making the world's highest level of product,Use the most advanced processing technology and equipment,New products emerge in an endless stream.KTC sales network is all over the world,And has set up a company in South Korea,Favored by users from all walks of life around the world