52results about How to "Does not affect welding" patented technology

The invention discloses a PCB structure capable of preventing tin connection of adjacent pads, for solving the problem of tin connection easily generated during welding of pads in a PCB. The PCB structure comprises a PCB main body and the N pads which are arranged on the PCB main body and are provided with welding holes. All the pads are sequentially arranged to form a pad group, the pad arrangement direction is parallel to the furnace direction of a PCB, N is a natural number greater than one, the pads are runway-shaped, the adjacent two pads are arranged in such a way that the runway-shaped straight edges are opposite, and the PCB main body area between the adjacent pads is provided with a silkscreen white oil layer whose length is not smaller than the length of the pads; and tin dragging pads connected with the pads at edges are disposed at the two ends of the pad group on the reverse surface of the PCB main body. The design is ingenious, the problem of tin connection between the tail portions of the pads and between the adjacent pads can be effectively solved, the labor cost is saved, and the production efficiency is also substantially improved.

The invention discloses a three proofing method of a firefighting electronic product PCB through matched electronic wax and relates to the technical field of protection of the firefighting electronic product PCB. Soft electronic wax with dropping-melting points of 62 DEG C and 82 DEG C is matched in proportion respectively and heated to be molten and mixed in three sections in a dedicated waxing device; the PCB is placed in the melted and mixed wax liquid for dip coating, and taken out and placed on a board inserting rack vertically when the dip coating time is up; a blowing device is used for accelerating the flow of extra wax fluids; and the next process is performed after the PCB is dried. The three proofing method has the obvious advantages of being simple in operation, short in cycle, low in price, good in 'three proofing' effect, unaffected on welding, lossless in repair and capable of greatly improving the production efficiency.

The invention discloses a creep age forming method for a large thin-wall component. The method comprises the following steps that firstly, an aluminum alloy blank is cut into a component plate containing a component unfolding body; a metal plate is cut into an auxiliary plate with an outer contour consistent with an outer contour of the component plate; the component plate and the auxiliary plateare tightly attached and fixed to form a reinforcing plate; the reinforcing plate is placed on a mold face, and the reinforcing plate is completely coated with ventilated felt; a sealant is pasted onthe edge portion of a mold, and a vacuum bag is pasted on the sealant so as to make the vacuum bag and the mold jointly form a closed space; the closed space is vacuumized to make the reinforcing plate be close to or keep attached to the mold face; the reinforcing plate and the mold are put into an autoclave for vacuum creep age forming, and after completion, the component plate, the auxiliary plate and the mold are separated; and an allowance plate is milled. According to the method, precise shape and property integrated forming of the large thin-wall component can be achieved, and a local buckling instability condition of the component with the weak rigidity in the creep age forming process is effectively restrained.

The invention discloses a method for preparing coated carbon aluminum foil of a lithium-ion battery current collector by employing metallurgical coke powder as a raw material. The method comprises the steps of pulverizing large-grained metallurgical coke powder of which the particle sizes are smaller than or equal to 3mm into the powder of which the particle sizes are 1-10 microns; adding an acid liquid to the metallurgical coke powder for primary acidolysis, putting the liquid into a hydrofluoric acid solution for secondary acidolysis, and sequentially putting the solution into an alkali solution and deionized water for washing and filtering; mixing the filtered metallurgical coke powder and a grinding aid for ultrafine ball-milling for 5-10 hours until the particle sizes of the metallurgical coke powder are 20-50nm; carrying out drying and slurry mixing; and uniformly coating aluminum foil with slurry to obtain the coated carbon aluminum foil of the lithium-ion battery current collector. The particles of the metallurgical coke powder are refined to the maximum extent by adopting an ultrafine ball-milling technology; the contact area of the coke powder particles and the current collector is increased; and the electric property of a lithium-ion battery is significantly improved. The method has the advantages that: on one hand, the manufacturing cost of the coated carbon aluminum foil of the lithium-ion battery current collector is reduced, and on the other hand, a new way is opened up for high added value utilization of the metallurgical coke powder.

The invention relates to a supporting frame, in particular to a supporting frame convenient to adjust and used for petroleum pipeline installation. According to the technical purposes, the supportingframe convenient to adjust and used for petroleum pipeline installation can play a supporting role, and can also adjust a petroleum pipeline, so that welding is facilitated, the petroleum pipeline isnot likely to move during welding, and welding is not affected. According to the technical scheme, the supporting frame convenient to adjust and used for petroleum pipeline installation comprises a bottom plate and the like; a moving device is arranged on the top of the bottom plate, and a cross plate is connected to the moving device; the top of the cross plate is provided with an adjusting device; and an arc-shaped plate is connected to the adjusting device. According to the supporting frame convenient to adjust and used for petroleum pipeline installation, due to the moving device and the adjusting device, the position of the petroleum pipeline can be adjusted, so that welding is facilitated; due to a fixed device, the petroleum pipeline can be fixed, so that it is prevented that because of moving of the petroleum pipeline, welding is affected, and the effects that the supporting role is played, the petroleum pipeline can also be adjusted, so that welding is facilitated, the petroleum pipelines is not likely to move during welding, and welding is not affected are achieved

The invention discloses an orienting device for a feet-lock bolt. The end of one side wall of a first U-shaped clamping plate and the end of one side wall of a second U-shaped clamping plate are respectively provided with an abutting plate that extends laterally, U-shaped grooves are arranged on wing plates at the left end and the right end of a web plate of H-shaped steel in a clamping manner respectively, the abutting plate of the first U-shaped clamping plate and the abutting plate of the second U-shaped clamping plate are attached to the web plate of the H-shaped steel respectively, and the opposite side walls of the first U-shaped clamping plate and the second U-shaped clamping plate are respectively provided with opposite upper through grooves and opposite lower through grooves. Theorienting device further comprises supporting frameworks, and the supporting frameworks are supported on the first U-shaped clamping plate and the second U-shaped clamping plate. A transverse caliperof the first U-shaped clamping plate and a transverse caliper of the second U-shaped clamping plate are respectively provided with a bracket assembly detachably clamped with clamping positions A, a clamping part detachably clamped with clamping positions B is arranged on one side of each bracket assembly, and each bracket assembly is also provided with an arc groove with an upward opening.

The invention relates to a supporting frame, in particular to a supporting frame convenient to adjust and used for petroleum pipeline installation. According to the technical purposes, the supportingframe convenient to adjust and used for petroleum pipeline installation can play a supporting role, and can also adjust a petroleum pipeline, so that welding is facilitated, the petroleum pipeline isnot likely to move during welding, and welding is not affected. According to the technical scheme, the supporting frame convenient to adjust and used for petroleum pipeline installation comprises a bottom plate and the like; a moving device is arranged on the top of the bottom plate, and a cross plate is connected to the moving device; the top of the cross plate is provided with an adjusting device; and an arc-shaped plate is connected to the adjusting device. According to the supporting frame convenient to adjust and used for petroleum pipeline installation, due to the moving device and the adjusting device, the position of the petroleum pipeline can be adjusted, so that welding is facilitated; due to a fixed device, the petroleum pipeline can be fixed, so that it is prevented that because of moving of the petroleum pipeline, welding is affected, and the effects that the supporting role is played, the petroleum pipeline can also be adjusted, so that welding is facilitated, the petroleum pipelines is not likely to move during welding, and welding is not affected are achieved

The invention relates to the technical field of lock tooling, in particular to a welding tool for automobile wheel locks, which includes an arc clamping mechanism, a fixing seat, a hollow tube clamping mechanism, a square tube clamping assembly and a round tube clamping assembly. The bottom of the arc-shaped clamping mechanism, and the fixed seat is fixedly connected with the arc-shaped clamping mechanism, the hollow tube clamping mechanism is located at one end of the arc-shaped clamping mechanism, and the hollow tube clamping mechanism is connected with the arc-shaped clamping mechanism, the square tube Both the clamping component and the round tube clamping component are located on the top of the hollow tube clamping mechanism. This equipment can fully clamp the wheel lock without affecting the welding. The structure is ingenious and can fully improve the welding effect.

The invention discloses a fixing clamp used for welding of buttons on a button board and a welding method. The clamp comprises a base plate, wherein a plurality of stepped holes distributed in an array mode are formed in the base plate, the shapes of the stepped holes are matched with the appearances of the buttons needing welding, a row of mounting holes is formed between every two adjacent rows of stepped holes, and the stepped holes and the mounting holes are distributed at intervals. When pins are welded through the clamp, the buttons cannot deflect, and the quality of the welded button board is effectively improved; clamping of the button board can be achieved through limiting edges, the phenomenon that the button board slides or deflects is avoided, and welding precision is improved effectively; the buttons do not interfere with other components; the stepped holes can be used for self-inspection of the buttons; the limiting edges are in a segmented structure, the button board can be taken down rapidly and conveniently from fractured positions, and the situation that the button board is damaged or fractured because the button board bears force unevenly when taken from one corner is avoided.

The invention relates to a processing method for a rotor core assembly of a high-speed generator, which uses a liquid adhesive that can form a solid adhesive film before curing. The copper damping strip will not be polluted in the middle; the method of local glue coating on the iron core punching sheet in the range of 6±1mm from the copper end plate will not affect the link between the copper damping strip and the copper end plate, and can ensure the gap between the iron core punching sheet. bonding between. The present invention has the following advantages: the overall strength of the rotor iron core assembly can be improved by adhesive bonding, and the damage caused by welding to the iron core punching is overcome; the local glue coating method of the end punching sheet does not affect the damping strip and the copper end Welding of plates; using adhesive to bond core punches can improve the insulation performance between rotor core punches and reduce eddy current loss of rotor core components.