The disclosure relates to the field of welding technology. A welding base includes a welding groove defined therein. A limiting member is arranged inside the welding groove for preventing solder and to-be-welded member from loosening from the welding groove after the to-be-welded member is welded to the welding joint. Based on the prior art welding base, the inside of the welding groove of the present disclosure is provided with a limiting member, which can prevent the solder from a longitudinal movement, thus preventing the solder from falling off the welding groove.

The disclosure relates to the field of welding technology. A welding base includes a welding groove defined therein. A limiting member is arranged inside the welding groove for preventing solder and to-be-welded member from loosening from the welding groove after the to-be-welded member is welded to the welding joint. Based on the prior art welding base, the inside of the welding groove of the present disclosure is provided with a limiting member, which can prevent the solder from a longitudinal movement, thus preventing the solder from falling off the welding groove.

The invention relates to a method for thermally connecting at least two workpiece sections, wherein at least a first and second workpiece section are provided, wherein at least the first workpiece section comprises an edge (1.1, 1.1′, 1.1″, 1.1′″) and the edge (1.1, 1.1′, 1.1″, 1.1′″) defines a termination of an edge section (1.2, 1.2′, 1.2″, 1.2′″), the first and second workpiece sections are positioned relative to one another in such a way that they are connected to one another at least in certain sections in their longitudinal extent, wherein the edge section (1.2, 1.2′, 1.2″, 1.2′″) has a defined geometry. According to the invention, the defined geometry of the edge section (1.2, 1.2′, 1.2″, 1.2′″) is dimensioned in such a way that a local region in the cross section of the edge section (1.2′) is provided with a maximum thickness (t.sub.max1′) at a distance (1.3′) from the edge (1.1′).

The invention relates to a method for thermally connecting at least two workpiece sections, wherein at least a first and second workpiece section are provided, wherein at least the first workpiece section comprises an edge (1.1, 1.1′, 1.1″, 1.1′″) and the edge (1.1, 1.1′, 1.1″, 1.1′″) defines a termination of an edge section (1.2, 1.2′, 1.2″, 1.2′″), the first and second workpiece sections are positioned relative to one another in such a way that they are connected to one another at least in certain sections in their longitudinal extent, wherein the edge section (1.2, 1.2′, 1.2″, 1.2′″) has a defined geometry. According to the invention, the defined geometry of the edge section (1.2, 1.2′, 1.2″, 1.2′″) is dimensioned in such a way that a local region in the cross section of the edge section (1.2′) is provided with a maximum thickness (t.sub.max1′) at a distance (1.3′) from the edge (1.1′).

An extruder for a metal material includes a cylinder having a receiving space in which a solid metal material is provided, a nozzle extending from a lower end of the cylinder, an upper coil provided on an outer surface of the cylinder and melting the solid metal material to form a liquid metal material, and a first lower coil provided on an outer surface of the nozzle to control an extruded shape of the liquid metal material.

An extruder for a metal material includes a cylinder having a receiving space in which a solid metal material is provided, a nozzle extending from a lower end of the cylinder, an upper coil provided on an outer surface of the cylinder and melting the solid metal material to form a liquid metal material, and a first lower coil provided on an outer surface of the nozzle to control an extruded shape of the liquid metal material.

A method of controlling a back weld root surface includes arranging a sealing portion along the back weld root surface of a workpiece to form a purge region adjacent to a section of a joint, supplying a shielding gas within the purge region at a first flow rate, and applying a weld deposit across a front surface of the section of the joint. The shielding gas displaces an ambient environment within the purge region, and the back weld root surface of the weld deposit includes a positive root penetration relative to the back weld root surface based at least in part on the shielding gas within the purge region.

A method of controlling a back weld root surface includes arranging a sealing portion along the back weld root surface of a workpiece to form a purge region adjacent to a section of a joint, supplying a shielding gas within the purge region at a first flow rate, and applying a weld deposit across a front surface of the section of the joint. The shielding gas displaces an ambient environment within the purge region, and the back weld root surface of the weld deposit includes a positive root penetration relative to the back weld root surface based at least in part on the shielding gas within the purge region.

A backing plate for includes a synthetic diamond portion configured to abut a joint region during a welding operation. A welding clamp includes a plurality of clamping blocks, each including a synthetic diamond portion configured to abut a pipe joint region during a welding operation. Because the backing plate and clamping block each include a synthetic diamond portion, the backing plate and clamping block can withstand high welding temperatures without damaging or diminishing the quality of the weld.

A backing plate for includes a synthetic diamond portion configured to abut a joint region during a welding operation. A welding clamp includes a plurality of clamping blocks, each including a synthetic diamond portion configured to abut a pipe joint region during a welding operation. Because the backing plate and clamping block each include a synthetic diamond portion, the backing plate and clamping block can withstand high welding temperatures without damaging or diminishing the quality of the weld.