8 results about "Induction brazing" patented technology

The present application relates to the technical field of induction heating, in particular to an electromagnetic induction brazing process and device for manufacturing a spiral-welded pipe by using a layered composite metal strip, the electromagnetic induction brazing process and device for manufacturing a spiral-welded pipe by using a layered composite metal strip is a welding method using ultra-high frequency or high frequency, medium frequency induction current as a heat source, high frequency heating is suitable for welding thin-walled pipe fittings, the medium frequency induction brazing equipment can replace the backward preheating means such as oxyacetylene heating, coal oven heating, box-type electric furnace heating and resistance heating, and can be used as a preheating equipment before brazing, the cooperation of the two can greatly improve the product quality, effectively save more than 60% of electric energy, and improve the labor conditions.

This invention relates to the field of electromagnetic relay manufacturing technology, and discloses an ultra-high frequency induction brazing device for an electromagnetic relay contact spring system, comprising: a worktable, a fixture, a moving mechanism, and an ultra-high frequency induction brazing machine; the fixture is disposed on the worktable surface and is used to clamp and fix the contact spring system; during welding, a spring sheet is sleeved on the Kovar alloy lead-out rod in the contact spring system to form a welding point between the two; the output end of the moving mechanism can move along a first direction and a second direction, and the induction brazing head of the ultra-high frequency induction brazing machine is disposed on the moving mechanism; during operation, the moving mechanism drives the induction brazing head to move along the first direction and the second direction, so that the induction coil of the induction brazing head is aligned with each welding point. This device adopts non-contact induction heating, completely avoiding the use of carbon rod electrodes, eliminating the generation of excess carbon powder from the source, and greatly improving the internal cleanliness and long-term operational reliability of the electromagnetic relay.

The invention provides a high-performance hard tube assembly silver-based induction brazing device, and relates to the technical field of welding equipment.The high-performance hard tube assembly silver-based induction brazing device comprises a welding platform, a box cover is installed at the upper end of the welding platform, a limiting unit is arranged at the upper end of the welding platform and can clamp a tube, and a welding unit is arranged above the welding platform; and the pipe is heated and welded by an induction heating coil in the welding unit. By arranging the synchronous centering type limiting unit driven by the two-way air cylinder, automatic centering, clamping and positioning of the hard pipe to be welded can be achieved, the problems that in an existing brazing device, the clamping coaxiality of the hard pipe is poor, and displacement deviation is prone to occurring in the welding process are effectively solved, the centering precision of a brazing opening is greatly improved, and the welding quality is improved. Defects of pseudo soldering, leakage and the like caused by centering deviation are avoided, and the sealing performance and the structural strength of the hard tube assembly after brazing are guaranteed. And meanwhile, the flexible high-temperature-resistant clamping base plates are arranged on the inner sides of the clamping jaws, so that the outer wall of the hard pipe can be prevented from being scratched, indented and the like in the clamping process.

This utility model discloses a processing device suitable for induction brazing of electromagnetic relay housing assemblies, relating to the field of relay housing assembly processing technology. It includes: a feeding mechanism, a positioning mechanism, a pressing mechanism, and a brazing heating mechanism. The feeding mechanism is used to pick up the housing assembly to be brazed onto the heating seat of the brazing heating mechanism; the positioning mechanism is used to push the housing assembly to be brazed onto the heating seat to a target positioning point; the pressing mechanism is used to press the housing assembly to be brazed onto the target positioning point using a pressing head, so that the heating coil of the brazing heating mechanism can perform the welding operation. This utility model alleviates the technical problem of low production efficiency in the manual operation mode of resistance brazing.

The invention discloses a fireless automatic brazing method for a heat exchanger and the heat exchanger, and relates to the technical field of heat exchanger manufacturing. The fireless automatic brazing method for the heat exchanger comprises the following steps that a plurality of to-be-welded semicircular pipes located at the same end of the heat exchanger are divided into a plurality of to-be-welded pipe sets, the to-be-welded parts of the semicircular pipes in the same to-be-welded pipe group have the same welding parameter requirement; induction heaters matched with the to-be-welded pipe sets in number and shape are provided, each induction heater is provided with a profiling area, and the profiling areas of the induction heaters are arranged on the periphery of the same to-be-welded pipe set in a one-to-one surrounding mode; and the induction heater is powered on, so that induction brazing is conducted on the to-be-welded portions of all the semicircular pipes in the corresponding to-be-welded pipe set. According to the technical scheme, the one-time brazing qualification rate of the special-shaped heat exchanger can be increased, the later repair welding rate is reduced, the production efficiency is improved, and the production cost is reduced.

This invention relates to the field of surface strengthening technology, specifically to a diamond composite brazing coating and its preparation method. The invention first mixes a brazing powder containing a first brazing filler metal powder, diamond abrasive, and flux with an organic binder to form a flexible strip-shaped brazing filler metal. Then, after a first pre-firing process, a porous, pore-fillable skeleton structure is formed. This skeleton structure is then embedded in a filler powder containing a second brazing filler metal powder and a powder binder, and ultrasonic vibration is used to fill the pores. After a second pre-firing process, it is placed on a substrate surface for induction brazing. This method can actively compensate for and repair pore defects caused by the volatilization of the organic binder before brazing, reducing pore residue in the coating after welding, improving the coating's density, surface smoothness, and abrasive bonding stability, and significantly improving the coating's surface quality.

The present application belongs to the technical field of contact assembly welding, and particularly relates to a welding device and a welding method for a multi-component contact assembly. The welding device comprises a welding support tool, a welding pressure head tool and an induction brazing device. The welding support tool comprises a base, and the base is fixed with a support ceramic rod, a first limiting ceramic rod and an arc leading piece support rod. The welding pressure head tool comprises an upper support frame, and the lower end of the upper support frame is fixed with a first upper pressure rod and a second upper pressure rod. The induction brazing device comprises an induction coil, and the induction coil is arranged around the welding part of the multi-component contact assembly. The welding device with a special structure can simultaneously realize the welding of multiple components, solve the influence of the welding of the last welding point on the strength of the previous welding point during step-by-step welding, improve the welding quality and the welding efficiency, and realize large-scale stable production by using the welding process of the present application. The welding process is easy to operate, low in cost, high in welding efficiency and good in welding quality consistency.