32results about How to "Reduced soldering requirements" patented technology

The invention provides an engine piston and particularly relates to a threaded welding type integral forged steel piston. The threaded welding type integral forged steel piston comprises a forged piston head and a forged piston skirt. The piston head is fixedly connected with the piston skirt. A sealed cooling oil cavity is formed between the piston head and the piston skirt. The cooling oil cavity is communicated with the outside through an oil inlet hole and an oil outlet hole. All ring grooves of the piston are formed in the piston skirt and include the two gaseous ring grooves formed in the upper portion of the piston skirt and one oil ring groove formed in the lower portion of the piston skirt. A pin base is arranged on the piston skirt. The upper end of the pin base and the lower end of the piston head are connected together through threads. The outer circle of the upper end of the piston head is partially or wholly in interference fit with an inner cavity in the upper end of the piston junk of the piston skirt. The surface or the top face of an outer circle of the piston is provided with a one-side weld joint.

The invention relates to a cooling component, which is a sealed shell structure, including a front end and a rear end, and a cavity for accommodating heat transfer oil is defined inside the cooling component, and a first opening is further opened on the front end of the cooling component. hole. The present invention also relates to an oil heater, which includes a plurality of cooling units and cooling components, the cooling components are respectively arranged in the upper convex unit and the lower convex unit of the last cooling unit, and the front end of the cooling component faces the oil heater. The front end of the heater and the front end of the cooling member are respectively sealed and connected with the upper convex unit and the lower convex unit, so that the last heat dissipation unit of the oil heater is isolated from the heat transfer oil.

The present invention relates to the technical field of metal structure processing, in particular to a tube plate welding method, comprising the following steps: fixing the plate body; setting a flat sealing gasket on the periphery of the hollow cylinder section, and inserting the hollow cylinder section through one end of the plate body In the hole; press the convex edge through the mold to protrude toward the plate body, and form an annular depression on the surface of the plate body by pressing the plate body; the sealing flat gasket is sandwiched between the annular depression and the protruding part of the convex edge ; Keeping the state of pressure applied, welding is performed on the other side of the hollow cylinder section, and the intermediate body and the plate body are fixedly connected. The present invention provides a tube sheet processing method that ensures the stability and sealing of the relative position after the tube sheet and the tube body are connected, and can appropriately reduce the welding quality requirements. The obtained tube sheet is used in a certain To a certain extent, the purpose of solving the sealing problem is achieved, so the welding requirements are effectively reduced. In the present invention, protection is also claimed for a method for connecting a tube body and a tube sheet and a heat exchanger.

The invention discloses an engine thermal baffle installation nut and an automobile. The engine thermal baffle installation nut comprises a cylindrical nut main body of which the inner wall is provided with a thread, one end of the nut main body is provided with a boss, and the boss is provided with an acting surface for being clamped by a tightening tool; and the free end of the boss is providedwith a transition section of which the radial size is gradually increased, an avoiding cavity is formed in the transition section, and the free end of the transition section is provided with a pressing plate extending outwards. The engine thermal baffle installation nut is simple in structure, and high in reliability and adaptability.

The invention discloses a portable thermocouple spot welding machine suitable for multiple materials and can inhibit generation of relatively large electric sparks under parameters of relatively high capacitance and relatively low voltage to form solder balls. A thermocouple is welded with various material surfaces with a high success rate through wire feeding, so that the problem that welding of the thermocouple on metal materials such as copper and aluminum by a conventional spot welding machine is not firm and even the thermocouple cannot be spot-welded is solved. Through adoption of a pen container type welding electrode and a function of automatically and quickly feeding wires, the phenomenon that the welding environment is severe is solved and the condition that the welding effect is poor as a result of an imprecise operation technology is avoided. The product designed by the invention is small in size, portable and easy to operate. Compared with conventional tin soldering and the thermocouple with a groove formed on the surface of a metal material, the temperature measuring precision is greatly improved, and a lot of energy loss as the temperature of an engineering material cannot be precisely measured or the temperature of the engineering material cannot be measured is reduced.

A high-heat-flux electronic component constant-temperature liquid cooling plate comprises an upper cooling plate, a liquid cooling mechanism and a lower cooling plate which are stacked in sequence, after stacking, a concave cavity of the upper cooling plate and a concave cavity of the lower cooling plate are oppositely combined to form a constant-temperature cavity surrounding the two sides of theliquid cooling mechanism, and a solid-liquid phase change heat storage mechanism is arranged in the constant-temperature cavity; the liquid cooling mechanism comprises a liquid cooling plate body anda connecting pipe body, the liquid cooling plate body comprises multiple paths of parallel pipe body parts, the head ends and the tail ends of the pipe body parts penetrate the connecting pipe body and are integrally welded, and the connecting pipe body is provided with multiple plugs at intervals, so that the multiple paths of parallel pipe body parts communicate end to end to form an S-shaped cooling path; and the solid-liquid phase change heat storage mechanism comprises a solid-liquid phase change heat storage material which is in gapless direct contact with the inner wall of the concavecavity in a solid state or a liquid state. The high-heat-flux electronic component constant-temperature liquid cooling plate can keep the long-term temperature of a power battery below the melting point of a solid-liquid phase change material, the temperature rise rate is low, and the temperature difference of all parts is small.

The invention discloses a novel module connecting structure of a locomotive. The novel module connecting structure comprises a first module and a second module; a module mounting beam is arranged on the right end surface of the first module; a mounting seat is arranged on the left end surface of the second module; the module mounting beam and the mounting seat are both n shaped and corresponding in size and position; the module mounting beam is vertically connected with the first module, and the right end of the module mounting beam is bent in 90 degrees to be closely mounted on the left end surface of the mounting seat as well as being fixedly connected through a plurality of bolts; an n-shaped connecting bottom plate is arranged on the outer side surface of the module mounting beam on the right end surface of the first module and is corresponding to the n-shaped outer side surface of the mounting seat; an n-shaped tape clamping groove is formed along the outer side surface of the mounting seat; another n-shaped tape clamping groove is correspondingly formed along the outer side surface of a connecting floor; the two tape clamping grooves are sealed and connected through a sealing tape. The novel module connecting structure has the beneficial effects that a small space in the locomotive is used; the dismounting and mounting are both performed at the outside of the locomotive; the requirements on the welding precision and assembling error are small; the sealing tape is easily overhauled and replaced.

The invention discloses a semi-rigid cable welding void rate control method, comprising the following steps: S100, pre-treating the semi-rigid cable to be welded; S100, pre-treating the semi-rigid cable to be welded; S100, pre-treating the semi-rigid cable to be welded. S200, welding the semi-rigid cable and the central conductor; S300, welding the outer conductor of the semi-rigid cable and the connector by using the matching tooling; S400, take out the matching tooling and assemble the connector, the process can avoid high welding temperature, if the welding time is too long, At that same time, the process has very low requirements on solder and does not require precise soldering operation, which is conducive to ensuring the qualified rate of the product. In addition, the process can reduce the requirements on the product structure, avoid fixing the product modules, and is conducive to the research and development of new products.

The invention provides an engine piston, comprising a forged piston head and a forged piston skirt, the piston head and the piston skirt are fixedly connected together, and a closed cooling oil is formed between the piston head and the piston skirt The cooling oil cavity is communicated with the outside through the oil inlet and outlet holes. The ring grooves of the piston are all set on the piston skirt, including two air ring grooves above and one oil ring groove below; On the piston skirt, the upper end of the pin seat and the lower end of the piston head are connected together by threads; part or all of the outer circle of the upper end of the piston head forms an interference fit with the inner cavity of the upper end of the fire land of the piston skirt; The top surface has a single-sided weld.