45results about How to "Improve welding firmness" patented technology

The invention relates to a bi-leg front fork of a tricycle, which comprises a plurality of fork stand pipes, a plurality of fork shoulders, a plurality of fork legs and a plurality of fork hooks, wherein the upper planes of the fork shoulders are fixedly provided with the fork stand pipes; the lower planes of the fork shoulders are fixedly provided with two symmetrical fork legs; the lower end of each fork leg is fixedly provided with the fork hook; the back of each fork leg which is fixedly arranged at the lower plane of each fork arm is further fixedly provided with a pair of fork legs, so that the fork legs form into two pairs at the front and the back; the four fork legs are evenly distributed and fixedly arranged at the lower planes of the fork shoulders; and the fork stand pipes are fixedly arranged at the center of the upper planes of the fork arms. The bi-leg front fork is further fixedly provided with another front fork based on the original mono-leg front fork to form the bi-leg front fork, so that the intensity and the rigidity of the front fork can be greatly enhanced, and the resistance strength of the horizontal impact generated in the running can be improved; and simultaneously, as a pair of damping springs is additionally arranged on the bi-leg front fork, the damping performance of the tricycle can be improved, and the comfortable sensation of the driver can be correspondingly increased.

The invention discloses a welding installation process of rotor partition plates of a rotary air preheater, and belongs to the technical field of installation of rotary air preheater rotors. The process includes the steps that (1) two partition plates symmetrically located on the two sides of a center cylinder in a first group of partition plates are welded to the wall of the center cylinder, andthe other two partition plates symmetrically located on the two sides of the center cylinder in the first group of partition plates are welded to the wall of the center cylinder; (2) each partition plate in a second group of partition plates is located between two adjacent partition plates in the first group of partition plates, and the second group of partition plates are welded according to thewelding sequence of the first group of partition plates; (3) N groups of partition plates located between the second group of partition plates and the first group of partition plates which are adjacent clockwise are uniformly distributed clockwise in the circumferential direction of the center cylinder; (4) N groups of partition plates located between the first group of partition plates and the second group of partition plates which are adjacent clockwise are uniformly distributed anticlockwise in the circumferential direction of the center cylinder. By means of the process, overall symmetry welding of the partition plates can be realized, and welding deformation in the prior art is reduced to the maximum.

The invention relates to the technical field of cold-rolled sleeves, in particular to a production process for preparing a cold-rolled thin-wall sleeve. According to the production process, a cold-rolled sheet comprising Q345-B material is used as a raw material to replace a traditional seamless steel pipe, so that the raw material cost is greatly reduced, and the production cost of the cold-rolled sleeve is reduced; the cold-rolled sleeve is manufactured through a flow production line of sheet cutting, sheet rolling, welding, calibrating and polishing instead of a traditional seamless pipe cold heading and reaming process, and the production efficiency is greatly improved; a special straight seam automatic welding machine and an automatic polishing machine are arranged into a whole, the polishing machine in the rear polishes a welding seam of a welding head for the first time when the welding head is welded, and when the welding head is reset, the polishing machine resets at the sametime to polish the welding seam of the welding head for the second time; and a self-made hydraulic calibrating machine and a special seedless two-roller sheet rolling machine are arranged into a whole, the sheet rolling and the calibrating are carried out in sequence, and the sleeve does not need to be transferred and machined for the second time.

The invention relates to a ceramic cigarette lighter used for a battery lighter and a manufacturing method of the ceramic cigarette lighter. Ceramic materials are made into a cigarette lighter ceramic body with a cavity in a die pressing mode, an inner plate of the cavity of the cigarette lighter is provided with a spiral resistance heating wire, two metallization sizing agent coatings printed on the back face of the cigarette lighter ceramic body serve as conductive metal layers, the resistance heating wire penetrates through small holes in two sides of the cigarette lighter ceramic body to make contact with the conductive metal layers, the two tail ends of the resistance heating wire are coated with silver sizing agents, an assembled semi-finished product is placed in a metallization furnace for metallization and welded at the same time, and the silver sizing agents serve as metallization sizing agents of the conductive metal layers. The main technical parameter is as follows: the set resistance value of the product is 1.2-2.2 omega, the power is 6-8 W, the contact resistance value of the conductive metal layers and the resistance heating wire is 0 omega, and the value of the resistance between the conductive metal layers and the ceramic is larger than 100 M omega. Once arranged on the battery lighter, the cigarette lighter can be safely and reliably used for a long time.

The invention provides an air cylinder and a compressor. The air cylinder comprises a main body and a connecting mechanism, wherein the main body is provided with an inlet passage and at least partially located in the connecting mechanism; the connecting mechanism is provided with a communication groove used for enabling the inlet passage and a pumping air pipe to communicate. The air cylinder and the compressor have the following advantages that the welding position of the main body and the connecting mechanism is located on the lateral wall, facing a first end, of the main body; according to the welding mode, the acting force on the main body mainly extends in the axial direction of the main body, so that the radial deformation of the main body is reduced as much as possible, and smooth operation of a shell is guaranteed; and the connecting mechanism can be made of low carbon steel with better welding performance, the welding time can be greatly shortened, welding stress is small, and welding firmness is good.

The invention discloses a rotary friction welding method which comprises the following steps: providing a first workpiece and a second columnar workpiece; treating a weld face of the first workpiece into a plane; arranging a step column in the center of a bottom surface of the second workpiece, wherein a groove is formed in a peripheral side face, which is close to the bottom surface of the secondworkpiece, of the step column, and the step column comprises a step column bottom surface; fixing the first workpiece and the second workpiece; rotating the second workpiece, enabling the weld face of the first workpiece to be contacted with the bottom surface of the step column, enabling the bottom surface of the step column to be rubbed with the weld face of the first workpiece so as to raise the temperature, pressing and upsetting the first workpiece and the second workpiece until the bottom surface of the second workpiece is contacted with the weld face of the first workpiece, maintaininga state of rotating the second workpiece and a state of pressing the first workpiece and the second workpiece, and upsetting the bottom surface of the second workpiece and the weld face of the firstworkpiece; stopping rotating the second workpiece, stopping pressing the first workpiece and the second workpiece, and completing welding after the weld contact surface is cooled.

The invention discloses a welding method of a photovoltaic assembly junction box. The welding method comprises the steps that a bus bar with a penetrating through hole and a junction box welding discwith a cylindrical protrusion are provided; and the cylindrical protrusion is inserted into the through hole in the bus bar, heating is conducted to enable soldering tin on the surface of the bus barto be molten, the molten soldering tin enters the through hole of the bus bar, and then the molten soldering tin is condensed. In the welding process of the photovoltaic assembly junction box, the cylindrical protrusion on the surface of the welding disc is completely inserted into the through hole of the bus bar, assembly pseudo soldering caused by relative moving of the bus bar and the welding disc in the welding process of the junction box is avoided, the probability of pseudo soldering can be effectively decreased, welding firmness is improved, and thus the safety and stability of a photovoltaic power station are improved.

The invention provides an argon welding device for a magnesium base. The argon welding device comprises a working table, a support is arranged on the working table, a guide rod is arranged on the support, guide wheels are arranged at the two ends of the guide rod, a flange fixing device is arranged on the portion, under the guide wheel on the left side, of the working table and comprises a supporting frame and a positioning rod, and the positioning rod is arranged on the supporting frame through a pressure spring; an air cylinder is arranged at the bottom end of the working table, a telescopic rod of the air cylinder is connected with the positioning rod through a steel wire, and the steel wire is guided through the guiding wheels. The positioning rod is driven by the spring to fix a flange, and the magnesium base is attached to the positioning rod to be positioned and can be welded conveniently; as an auxiliary positioning block is arranged and used for positioning the magnesium base from the side face, it is ensured that the magnesium base is placed stably, and the welding firmness of the magnesium base is improved.

The invention discloses a welding construction device for a steel structure of a building roof. The welding construction device comprises a welding construction platform, a frame body arranged on the welding construction platform, two conveying brackets and two welding ports for cutting the steel structure A cutting head assembly; also includes a central rotating connecting piece, an arc-shaped supporting assembly, a hanging rod piece, a rotating sleeve body and a rotating connecting driving piece; the central rotating connecting piece is arranged on a rotating welding construction platform; the hanging rod The vertical sliding part is arranged on the frame body, and the frame body is provided with a lifting member that drives the suspension rod to rise and fall; two cutting head assemblies are respectively arranged on the rotating sleeve body and the side wall of the suspension rod member, and the two cutting head assemblies Opposite to the two conveying brackets; both the rotating sleeve body and the side wall of the hanger are provided with rotating connection driving parts. The invention has a simple structure, can adjust the connection angle of the steel structure before welding, and can cut the welding end of the steel structure to match the connection angle obliquely, so as to improve the firmness after welding; the operation is convenient and the practicability is strong.

The invention provides a boiler body welding method of a thin metal gravity type heat pipe boiler. The boiler body welding method comprises the following steps that S1, carrying and cutting are conducted; S2, a boiler body barrel is machined; S3, a splicing bottom plate is machined; S4, the boiler body barrel is welded; S5, the splicing bottom plate is welded; S6, the splicing bottom plate and an inner partition plate are welded; and S8, final assembly welding is conducted. According to the boiler body barrel and the splicing bottom plate, a 90-degree welding folded edge I and a 90-degree welding folded edge II are bent for end welding, overheating deformation in the welding process is prevented, assembly of all components is prevented from being affected, welding can be conducted through an automatic welding machine, the welding efficiency and quality are improved, the labor cost is reduced, welding firmness is good, and safety is high. During welding, water is injected into a water disc, so that overheating deformation caused by too high welding temperature is further prevented. A gravity type heat pipe hole wraps a gasket piece through a gasket piece sleeve, the thickness of the gravity type heat pipe hole is increased, a thick sealing ring can be adopted, the contact area is increased, and water leakage is not prone to occurring.