High-effect surface cladding manufacturing method of motion pairs system

Abstract

This invention relates to a high-effect surface cladding manufacturing method of motion pairs system, in particular, a method that enables submicron and nano-based tetrafluoroethylene macromolecule particles to be well mixed in Ni—P-based composite electrolyte via various proportions and allocation technologies as appropriate, thereby making those particles to be evenly cladded on the surface of sintered parts that is formed by the copper-tin base powder metallurgy through the electrochemistry reaction, based on diverse proportions of nano particles and/or micron-sized particles. Owing to high activations of both superfine particles, the invention enables the complex reaction of superfine particles on the surface of tetrafluoroethylene and copper-tin base component to be directly completed in low temperature. Therefore, the invention enables products that are produced by the technology to possess the characteristics of wear-resisting and high hardness, low friction factor, precision in size, lower manufacturing cost and higher system capacity efficiency.

What is claimed is: 
     
         1 . A high-effect surface cladding manufacturing method of motion pairs system, comprising the following steps:
 Directly applying copper base (bronze) alloy powder and particles that are produced by spray for preliminary screening;   Mixing those powder particles with different diameters with a plurality of micro-metallic alloy in certain proportions and adding a lubricator in accordance with the manufacturing process requirement;   Carrying out sufficient mixed powder operation;   Filling those powder and particles that have been fully mixed during the mixed powder operation inside a hollow mode of a press machine, subsequently, upper and botton punches and a middle mole are pressurized and extruded to enable the powder and particles to be formed;   Having a relation between the pressure for shaping, the punch area and expected green density value for carrying out a green test;   Sending the shaped green into a sintering furnace for carrying out sintering in reduction atmosphere;   Directly carrying out subsequent surface modifications and cladding treatments on the sintered product, and then, carrying out the size precision process;   Carrying out thermal degreasing treatment on the surface of the material, based on the grease types by selecting a proper lyophilic or acidity dissolving agent (solvent) for carrying out a prior cleaning or supersonic/ultrasonic degreasing treatment, in order to degrease the surface of the workpiece;   Carrying the mixing, exhausting and filtering processes under the room temperature and evenly mixing the particles with a power mixer;   Carrying out the surface activation treatments, surface modifications and respective water cleaning and activation processes;   Placing the cladding layer of a workpiece under the temperature for high temperature baking applying cladding material hardness without being proceeded by thermal treatment, enabling the surface cladding to proceed further densification process; and   Carrying out ultrasonic cleaning of the component after being treated by the process of densification, depending on the precision levels required, in order to remove the particles that are unable to be cladded on the surface of the material during the post stage of the electrochemistry reaction.   
     
     
         2 . The high-effect surface cladding manufacturing method of motion pairs system of  claim 1 , wherein the mixed powder operation applies a upright spiral type mixer to evenly mix those particles at the rotation speed of 60˜120 rpm. 
     
     
         3 . The high-effect surface cladding manufacturing method of motion pairs system of  claim 1 , wherein the green test has the ultimate green density thereof remains above 7.9˜8.0 g/cm3. 
     
     
         4 . The high-effect surface cladding manufacturing method of motion pairs system of  claim 1 , wherein the cladding material hardness without being proceeded by thermal treatment is able to reach 280˜380 VHN, subsequently, the cladding layer of a workpiece is placed under the temperature at 300° C.˜350° C. for high temperature baking about 10˜15 min. 
     
     
         5 . The high-effect surface cladding manufacturing method of motion pairs system of  claim 1 , wherein the component after being treated by the process of densification is under ultrasonic cleaning for about 2˜5 min.