56 results about "Gold processing" patented technology

The invention discloses a cold drawing welded tube manufacture process for a high-accuracy hydraulic oil cylinder, which sequentially comprises the following steps of longitudinal shearing, roll bending molding, high frequency welding, welding joint treatment, online eddy current testing, sizing cutting, normalization, pinching, surface treatment, cold drawing, annealing, straightening, defect detection and cutting for measurement. The method is quick in processing molding, high in production volume, free of damage on surfaces in cold drawing and high in manufacture accuracy. After cold drawing, bearing capacity of a welded tube is improved by about 60%, and the welded tube is high in tensile strength and good in elongation rate. Follow-up gold processing amount is reduced, utilization rate of steel materials is improved, and manufacture cost is reduced. The cold drawing welded tube can be directly applied to manufacture of high-accuracy hydraulic oil cylinders.

The invention relates to a manufacturing method for high-precision cold-drawing welded pipe. The manufacturing method for the high-precision cold-drawing welded pipe includes steps of longitudinal shearing, roll-bending forming, high-frequency welding, weld joint treatment, sizing, online eddy current inspection, pre-straightening treatment, pipe cutting, stress relief annealing, pinching, acid dipping, phosphating, saponification treatment, cold drawing, induction furnace quenching treatment, tempering treatment in a box type furnace, straightening treatment, honing, magnetic leakage detection and pipe cutting measurement. The product obtained through the manufacturing method for the high-precision cold-drawing welded pipe is high in yield strength, high in tensile strength, precise in size, smooth in surface, fast in processing forming speed and high in yield, the manufacturing precision is obviously improved, the cold-drawn welded pipe is good in surface smoothness and low in roughness, the subsequent gold processing amount is reduced, the steel material use ratio is improved, the manufacturing cost is lowered, and the energy conservation and environment protection are boosted.

The invention relates to a plane opening and closing type diesel engine high-pressure common rail oil sprayer. A seal ball in a control valve coupler is a plane seal ball; an annular seal plane, a throttling pit, a throttling hole and a rapid pressure relief structure are arranged on the upper end of a guide valve seat; the diameter of the seal plane of the plane seal ball is equivalent to the outer diameter of the annular seal plane; and the hardness, planeness and surface roughness of the seal plane and the annular seal plane reach the design requirement. Because a seal steel ball in the control valve coupler is changed into the plane seal ball with a seal plane, the seal form of the throttling taper hole on the upper end surface of the guide valve seat is changed into plane seal, and the rapid pressure relief structure is added, the invention ensures that high-frequency opening and closing seal performance is high and the machining process of a sealing element is greatly enhanced, can be finished through adopting the conventional gold processing and heat treatment, has high processing efficiency and stable and reliable seal performance and rapid pressure relief performance, and is an improvement of the traditional products of the Germany Bosch company.

The new processing technology of piston ring involves the processing technology of piston ring. It includes the following process steps: casting→grinding→heat treatment→grinding→gold processing→laser strengthening treatment→heat setting→gold processing. Since the surface layer of the piston ring is processed by laser alloying or laser cladding, and is rapidly melted by a high-energy laser beam, the matrix at a certain depth on the outer surface of the piston ring is rapidly melted and then solidified to form a specific ceramic particle reinforced composite coating. The coating and the piston ring body are metallurgical structures, which will not fall off or peel off under the action of external force. The invention is easy for industrial production, has excellent anti-adhesive wear and anti-abrasive wear capabilities, and has good product technical stability.

The invention discloses a method for preparing an immersion gold printed circuit board. The method includes the steps that an outer layer circuit diagram is provided and manufactured, and a PCB with plug holes and an aluminum sheet with guide holes are prepared, wherein the aluminum sheet is used for plugging printing ink into drill holes of the PCB through the aluminum sheet guide holes corresponding to the drill holes in the PCB; the printing ink is plugged into the drill holes of the PCB through the aluminum sheet; solder resisting is conducted on the PCB with the drill holes into which printing ink is plugged; exposure is conducted on the PCB, wherein in the exposure process, Favrini negative films are utilized to block light for the faces of the drill holes in which semi-plug holes need to be formed; the PCB on which exposure is conducted is developed, wherein in the developing process, printing ink of 20% to 80% of the depth of the drill holes is rinsed out through developing potions; immersion gold processing is conducted on the developed PCB. The method for preparing the semi-plug holes of the immersion gold board is easy to control, operation steps and production materials are reduced, production cost is greatly saved, and production efficiency can be rapidly improved.

The invention is applied to the technical field of a printed circuit board, and provides a processing method of a printed circuit board and a printed circuit board formed by use of the processing method, for the purpose of solving the problems that since local electroplating thick gold processing is carried out after external-layer etching processing, a local electroplating thick gold position cannot be conductive and lead wires cannot be added to a part of the printed circuit board in the prior art. The processing method of the printed circuit board comprises the following step of providing a plate substrate, an external-layer pattern, pattern electroplating, nickel plating, thin gold plating, external-layer local electroplating gold pattern processing, the local electroplating thick gold processing and external-layer etching. According to the processing method, before the external-layer etching processing, the external-layer local electroplating gold pattern processing and the local electroplating thick gold processing are carried out, so that conductive lead wires are additionally arranged on an external-layer line pattern, the whole copper foil layer of the plate substrate can be conductive, the membrane removing operation is simple, the manufacturing efficiency is improved, and the processing period is shortened.

The invention relates to a fit-typed die-casting composite bottom pan, comprising an aluminium alloy pan body and a composite bottom sheet which is fit at the bottom of the pan body; the fit-typed die-casting composite bottom pan is characterized in that the pan is formed by the rolling and composing of a composite material sheet and a stainless steel sheet; the composite material sheet is provided with a plurality of circular concave troughs with internally inclined side wall; the bottom of the pan body is provided with a plurality of circular convex ribs which are embedded into the circular concave troughs; after being fit, the circular concave troughs and the circular convex ribs are rabbeted with each other; the composite material sheet is made of pure aluminium or aluminium alloy or material with the linear expansion coefficient approximate to the aluminium alloy. The invention also relates to a manufacture process used for the fit-typed die-casting composite bottom pan; the manufacture process of the invention is used for preparing the fit-typed die-casting composite bottom pan by the steps as follows: composite bottom sheet preparing, die casting of aluminium alloy pan body, flap edge removing of the pan body, gold processing, fitting, surface disposing, etc. The fit-typed die-casting composite bottom pan has the advantages of firm connection of the composite bottom sheet, high thermal efficiency, good heat-resistance fatigue performance, simple manufacture process, and the like, and is a cooker which is especially suitable for being used for induction cookers.

The invention relates to a manufacturing method of a cold drawn welded pipe for a precision oil cylinder. The manufacturing method comprises the following steps: longitudinal shearing, rolling forming, high-frequency welding, tensioning, online eddy current inspection, stress relief annealing, normalizing air cooling treatment, pre-straightening treatment, pipe cutting, pinching, acid washing treatment, phosphating treatment, saponification treatment, cold drawing, induction furnace quenching treatment, tempering treatment in a box type furnace, straightening treatment, honing, magnetic leakage inspection and pipe cutting measurement. A product obtained by the method has the advantages of high yield strength, high tensile strength, precise size, smooth surface, high processing and forming speed, high yield, obviously improved manufacturing precision, good surface smoothness of the cold drawn welded pipe, low roughness, reduced subsequent gold processing, improved utilization rate of steel, reduced manufacturing cost and capability of promoting energy conservation and environmental protection.

The invention discloses a printed circuit board and a fabrication method thereof. The fabrication method of the printed circuit board includes following steps: preparing a PCB making plate; performing coating nickel-gold processing: electroplating a nickel layer and a gold layer in sequence in an area in need of electroplating nickel-gold patterns on the making plate of the PCB, and forming a nickel-gold cover head; performing the first pattern transfer: mounting a first external layer dry film on the making plate of the PCB after coating nickel-gold processing, and the outer edge width of the pattern area of the first external layer dry film being wider than the outer edge width of the nickel-gold cover head; and external layer etching: obtaining a whole line pattern via etching. The fabrication method of the printed circuit board is applicable to the whole line pattern, the suspension of nickel of a pad and the line can be prevented, or the nickel-suspension amount is small, and the problem of pad and line loss is improved. According to the printed circuit board, the suspension of nickel of the pad and the line can be prevented, or the nickel-suspension amount is small, pad and line loss is avoided, and the performance is stable and safe during usage.

The invention discloses a nickel gold processing method for a printed circuit board. The nickel gold processing method for the printed circuit board comprises steps that: a board surface of the printed circuit board is coated with resistance welding; exposure development treatment on the resistance welding is carried out to expose a welding disc on the printed circuit board; a film is pasted on the board surface of the printed circuit board, air extraction treatment on a gap between the film and the board surface of the printed circuit board is carried out in a film pasting process, so a vacuum degree of the gap between the film and the board surface of the printed circuit board is made to be greater than or equal to the threshold; exposure development treatment on the film is carried out to expose the welding disc needing nickel gold protection on the printed circuit board; a nickel gold protection layer is formed on the welding disc needing nickel gold protection. The nickel gold processing method facilitates to reduce break of a welding disc protection film and improves a product good rate.

The invention discloses a non-ceryl pattern material and a manufacturing technology used for investment casting thereof. The non-ceryl pattern material comprises the following components in percentage by weight: 48.2% of potassium aluminum sulphate, 32.2% of magnesium sulfate, 19.3% of aluminum sulfate and 0.3% of ferric oxide, wherein the manufacturing technology comprises the manufacturing process of non-ceryl investment and the manufacturing process of sand cores. The non-ceryl pattern material does not contain paraffin or stearic acid, replaces the ceryl pattern material for investment casting, has small deformation, is not easy to soften, has simple process, saves time and labor, reduces cost, and is particularly suitable for manufacturing large and medium-sized impeller precision castings with small production lot, which are delivered in a short time, have complicated inner chamber shape, are provided with blades and are inconvenient for gold processing.

The invention provides a surface treatment method for an IC carrier board. The method is characterized in that the method comprises the following specific steps: S1. performing pre-treatment on a substrate, namely a step including cutting materials and drilling holes; S2. performing electroless plating copper and copper plating by electroplating; S3. drying a film and performing acid etching; S4.performing AOI and anti-welding processing; S5. electroplating a bright nickel layer/hard gold layer on a gold finger surface; S6. electroplating a matte nickel layer and a soft gold layer on a bonding surface; and S7. performing post-treatment, namely a step including moulding, testing, performing FQC, performing FQA, and packaging. In the surface treatment method for the IC carrier board, the gold finger surface adopts electroplated nickel (Ni)/gold (Au), the bonding surface replaces an existing chemical nickel/palladium/gold process with an electroplating matte nickel + electroplating softgold process, thereby effectively improving a quality problem of instability of a connection position, and the quality of the IC carrier board is improved.

The invention discloses a reversing valve and a manufacturing method thereof. The reversing valve comprises a valve body part and a sliding block part. The valve body part comprises a valve seat, a valve body and a connecting pipe. The reversing valve is characterized in that the valve seat comprises a valve seat body, the valve seat body is provided with flat plate segments which are connected mutually and used for matching with the sliding block part in a sliding mode and circular arc segments for connecting with the valve body, and the flat plate segments and the circular arc segments are enclosed to form a hollow cavity body. According to the reversing valve provided by the invention, the hollow cavity body is formed in the valve seat body, the overall amount of material using of the valve seat is effectively reduced, so that cost of materials is reduced; and the gold processing allowance of the hollow cavity body is less, a connecting pipe hole on the valve seat body is convenientto process, and the processing cost is reduced.

The invention discloses a chemical nickel solution applied to a wafer-level packaging chemical nickel-gold process. Water is adopted as the dissolvent of the solution. The solution comprises, by concentration, 20-40g/L of nickel salt, 20-40g/L of a reducing agent, 20-50g/L of a complexing agent, 1-5mg/L of a stabilizing agent and 2-200mg/L of an impurity removing agent. The impurity removing agentcontains at least one pyridine type compound, and impurity metal ions can be chelated by the pyridine type compound in the impurity removing agent so as to reduce the influence of impurities in the solution on the performance of a plating solution. The pyridine type impurity removing agent is adopted by the chemical nickel solution to eliminate the influence of impurity heavy metal in the solution on the plating solution without any side effect brought to the plating solution by the pyridine type impurity removing agent. Therefore, even if the content of impurity ions in the plating solutionis very low or zero, the performance of the plating solution is not influenced by the added pyridine type compound.

The invention discloses a method for manufacturing a circuit board. The method comprises the following steps: carrying out rough shape cutting on a PCB material; carrying out primary hole drilling; carrying out plated-through-hole processing; carrying out whole-board electroplating processing; carrying out first-time pattern transferring, carrying out copper thickening; carrying out resin hole plugging; carrying out resin grinding; carrying out film removing; carrying out second-time pattern transferring; carrying out flash gold processing; carrying out third-time pattern transferring; carrying out electric thick soft gold processing; carrying out secondary hole drilling; carrying out film removing; and carrying out outer-layer line etching. According to the invention, selective electroplating is carried out by two-times line transferring, so that the local copper thickness request is met. With the resin hole plugging and the third-time pattern transferring, requirements of plugged hole evenness and fullness from the client are met; and the line is bound with the PAD electric thick soft gold partially, so that application of the special function is realized.

The invention discloses a gold processing sewage treatment device. The device comprises a pretreatment tank, a reverse osmosis tank, a purification tank and a sedimentation tank; a filtering assemblyfor filtering large impurities is mounted in the pretreatment tank; a dirt removing assembly for preventing blockage is mounted above the filtering assembly; a plurality of mounting grooves are formedin the inner wall of the reverse osmosis tank; a detachable reverse osmosis assembly is mounted in each mounting groove; a chemical feeding assembly for preventing chemicals from being dissolved incompletely is mounted in the purification tank; a stirring assembly for assisting dissolution is mounted in the purification tank; according to the invention, the detachable reverse osmosis assembly isarranged, so the damaged filter element can be timely replaced; the air guide pipe and the chemical guide pipe are mounted in the vertical height direction of the purification tank, so that the chemical coverage area is effectively increased, the wastewater treatment quality is improved, the blockage of the filter assembly can be effectively prevented by arranging the dirt removing assembly, and the sewage treatment efficiency is greatly improved.

The invention discloses a circuit board production technology, and especially relates to a nickel-gold plating circuit board production technology. The nickel-gold plating circuit board production technology is characterized in that step 1, an appearance of a circuit board can be produced; step 2, the hollowing-out of the circuit board can be carried out by the punching; step 3, the surface processing of the circuit board can be carried out after the stamping; step 4, the processing before the Electroless Nickel/Immersion Gold processing of the stamped circuit board can be carried out; and step 5, the Electroless Nickel/Immersion Gold processing can be carried out. The nickel-gold plating circuit board production technology is advantageous in that the common operation process adopted by convention circuit board production, and the stamping is preposed, and the two times of the circuit board surface processing can be combined, and then the loss of the opened liquid medicine can be reduced; compared to the prior art, the costs can be reduced by about 20%, and the success rate of one-time production can be increased by 15%, and therefore the production efficiency can be improved, the total production period can be reduced, and the economic benefit is obvious.