Selection of stud welding machine

 

In order to facilitate the selection of stud welding machine, we analyze and discuss according to the stud diameter

 

1、 The diameter of studs to be welded is within 10 mm (included):

 

Table 1

 

No. plate thickness of workpiece, screw diameter, material, fastness requirements, penetration, type of welding machine

 

1 ≤ 2mm < 10 mm carbon steel stainless steel aluminum copper low shallow capacitor discharge

 

2 ≤ 2mm < 10 mm carbon steel stainless steel aluminum copper high shallow short cycle arc

 

3 > 2mm < 10mm carbon steel stainless steel aluminum copper high deep long cycle arc

 

S / N 1: this example is the welding of small diameter studs on the thin plate. It is required that the thickness of the welding base metal shall not be less than 1 / 10 of the stud diameter and ≥ 0.5mm. After welding, the base metal has small deformation, shallow penetration and relatively low welding strength (according to the specific classification of stud diameter, such as M6 studs, the maximum torque of star brand capacitance discharge stud welding machine can be about 15kn); standby Note: special welding studs for capacitance shall be selected for the capacitor discharge stud welder, i.e. the studs with arc striking points on the end face.

 

Applicable industries: electrical cabinet, kitchen cabinet, safe cabinet, elevator and other industries.

 

S / N 2: this example is the welding of small diameter studs on the thin plate. It is required that the thickness of the welding base metal shall not be less than 1 / 8 of the stud diameter and ≥ 0.6mm. After welding, the deformation of the base metal is small, the penetration is slightly shallow but deeper than that of the capacitance discharge stud welding machine, and the welding strength is high (according to the specific division of the stud diameter, for example, M6 studs, the short cycle arc stud welding machine of star brand can achieve The torque is about 30KN);

 

Note: the end face of short cycle arc stud welding pin is generally divided into arc face, expansion head, complete head, flange head, etc., and its protection mode is generally divided into: "no protection", "gas protection", "porcelain ring protection", etc.

 

Applicable industries: automobile manufacturing, high voltage distribution cabinet, mechanical sheet metal and other industries.

 

No. 3: in this case, small diameter studs are welded on the thick plate, and the thickness of the base metal is required to be greater than 2mm; in this welding process, the penetration is deep, usually 1-3mm, and the welding strength is high (the torque value is greater than the capacitance discharge stud welding machine);

 

Note: there are welding studs specially used for long-period arc stud welding machine. The studs can be threaded, half threaded or unthreaded. Generally, the studs have arc starting points.

 

Applicable industries: machining, welding of water-cooled nails on the water-cooled wall of boiler, etc.

 

 

 

Others: 1. When the welding diameter of arc welding machine is less than 10 mm, unprotected, gas protected and porcelain ring protected can be selected;

 

2. The maximum welding diameter of capacitor welding machine is 10 mm;

 

3. The surface of capacitor welding shall be free of water, oil, rust, etc;

 

4. At present, the maximum diameter of arc stud welding is 32mm.

2、 The diameter of studs to be welded is more than 10 mm:

 

Table 2

 

No. screw diameter, material, stud type, strength requirement, penetration welding machine type

 

1. 10-18mm carbon steel stainless steel straight nail / tack high deep arc stud welding

 

2. 13-22mm carbon steel stainless steel straight nail / big head nail high deep arc stud welding

 

3.16-28mm carbon steel stainless steel straight nail / big head nail high deep arc stud welding

 

4. 10-36mm carbon steel stainless steel threaded steel high deep submerged arc stud welding

 

For stud welding above M10, arc stud welding machine is recommended. Submerged arc stud welding is also one of arc stud welding.

In general, for stud welding in No. 1-3, porcelain ring is used as protection tool; for No. 4, due to irregular shape of threaded steel itself, traditional porcelain ring protection method is not suitable, so welding flux is used as protection material.

Arc stud welding machines are generally divided into two types:

1. SCR arc stud welding machine has a series of advantages, such as stable performance, simple maintenance, long service life, strong resistance to harsh environment, ability to adapt to a wider range of power grid fluctuations, etc.; but at the same time, it also has the disadvantages of large volume, heavy mass, etc., so it is very suitable for steel structure factory or centralized stud welding processing point and other occasions.

Startec defines the model of SCR stud welding machine as RSN / RST / RSM series, such as: rsn-2500-5, rst-2500-3, rsm-3150-2, etc.

2. The inverter arc stud welding machine has a series of advantages, such as small size, light weight, energy saving, convenient movement, and exquisite control. However, the equipment is too dependent on a large number of electronic components, which is limited by the impact of supply quality of relevant suppliers. At the same time, the relatively complex internal structure also has corresponding requirements for after-sales technicians. Inverter arc stud welding machine is usually suitable for stud welding on steel structure projects.

 

Startec defines the model of inverter stud welding machine as rsn7 series, such as rsn7-1600, rsn7-2500 and rsn7-3150.