4results about How to "Increase weld length" patented technology

The invention provides a magnesium-containing aluminum-based intermediate plate, a brazing plate and a composite plate for controlled atmosphere brazing and a preparation method of the magnesium-containing aluminum-based intermediate plate, the brazing plate and the composite plate, and relates to the technical field of magnesium-containing aluminum alloys, and the magnesium-containing aluminum-based intermediate plate comprises a core material layer and a brazing composite layer which are arranged in a laminated mode; the brazing composite layer comprises a pre-embedded brazing flux layer and a filler layer, and the pre-embedded brazing flux layer is arranged close to the core material layer; the thickness of the pre-embedded brazing flux layer is larger than or equal to 0.01 mm, and the pre-embedded brazing flux layer is filler alloy containing fluorine series brazing flux particles; the addition amount of fluorine-containing brazing flux particles in the pre-embedded brazing flux layer is less than or equal to 15 wt%; the core material layer is made of magnesium-containing aluminum-based alloy, and the alloy elements of the core material layer comprise, by mass, 0.3%-1.5% of Mg. The magnesium-containing aluminum-based intermediate plate for controlled atmosphere brazing is annealed, a magnesium-containing aluminum-based brazing plate can be obtained, and after controlled atmosphere brazing is conducted on the magnesium-containing aluminum-based brazing plate, the welding quality is good, welding seams are full, and the success rate is high.

The spiral steel pipe stable welding equipment comprises a bottom frame and a mounting base, the mounting base is arranged at one end of the bottom frame, a guide roller set and an inner welding machine are arranged on the lower portion of the mounting base, and an outer welding machine and a re-guide roller are arranged on the upper portion of the mounting base; a plurality of groups of first conveying rollers which are used for supporting the spiral steel pipe to rotate and do translational motion are arranged on the bottom frame, each first conveying roller comprises an inner roller shaft and an outer spiral belt, the cross section of each outer spiral belt is rectangular, the outer spiral belts are wound and fixed on the inner roller shafts, and the outer spiral belts and the outer surface of the spiral steel pipe are arranged in a tangent rolling manner; every two first conveying rollers form a group and are oppositely arranged, and the first conveying rollers are distributed in the axial direction of the spiral steel pipe at intervals. The unique spiral steel pipe bearing roller is designed, static friction is used for replacing sliding friction to push a spiral steel pipe to move, and the stability of the spiral steel pipe in the welding process is guaranteed.

The utility model discloses a welding type crawler belt mobile crushing station rack assembly and a mobile crushing station, and belongs to the technical field of crushing stations. According to the technical scheme, the welding type crawler belt moving crushing station rack assembly comprises a rack and crawler belt assemblies on the two sides of the rack, the opposite side faces of two rack plates are each provided with a plurality of connecting plates, the connecting plates are perpendicular to the rack plates, and the connecting plates on each rack plate are arranged in the advancing direction of a crushing station; each crawler belt assembly comprises a crawler belt beam, and the crawler belt beams are welded and fixed to the multiple connecting plates on the corresponding sides. The crawler belt movable crushing station has the advantages that the large-breadth flat plate is arranged on the side face of the machine frame, the crawler belt beam and the machine frame plate are welded and fixed through the connecting plates, the contact area of the machine frame and the crawler belt of the crawler belt movable crushing station is increased, the contact area of the machine frame and the crawler belt is increased by welding the machine frame and the crawler belt together, the welding line area is large, stress points are increased, and a machine frame assembly is stressed more evenly. The impact resistance is better, and the service life is longer.

The application relates to the field of building construction and discloses an attached support rod and a tower crane. The attached support rod comprises an angle steel column and end plates. The angle steel column comprises a plurality of sequentially arranged connecting angle steels. One of any two adjacent connecting angle steels is provided with a connecting notch, and the other connecting angle steel is provided with a connecting protrusion. The connecting notch and the connecting protrusion are matched in shape and are connected through a connecting inclined surface. The two end plates are oppositely arranged along the length direction of the angle steel column, and the two ends of the angle steel column correspond to the two end plates respectively. Through the matched connection of the connecting notch and the connecting protrusion and the connecting inclined surface welding, the overall structural strength and stability of the attached support rod are significantly enhanced. The short connecting angle steels are overlapped to form an angle steel column with a required length, and the heavy flange plates or ear plates and other accessories in the traditional lengthening mode are replaced. Therefore, the material utilization rate is greatly improved, and the waste of additional connecting parts is avoided.