Drawing aluminum alloy extruded parts
Surface drawing process of aluminum alloy
Straight wire drawing
Refers to the machining of straight lines on the surface of the aluminum plate by mechanical friction.
It has the dual function of removing scratches on the surface of the aluminum plate and decorating the surface of the aluminum plate. There are two types of straight wire drawing: continuous wire and intermittent wire. Continuous thread patterns can be obtained by scouring pads or stainless steel brushes through continuous horizontal straight-line rubbing on the surface of the aluminum plate (such as manual grinding under the existing device or using a planer to clamp the wire brush on the aluminum plate). By changing the wire diameter of the stainless steel brush, textures of different thicknesses can be obtained. Intermittent silk patterns are generally processed on brushing machines or rubbing machines. Production principle: Two sets of differential wheels rotating in the same direction are used. The upper set is a fast-rotating grinding roller, and the lower set is a slow-rotating rubber roller. The aluminum or aluminum alloy plate passes through the two sets of rollers and is brushed out. Delicate intermittent straight lines.
Random pattern drawing
It is an irregular, non-obvious matte silk pattern obtained by moving and rubbing the aluminum plate back and forth under a high-speed copper wire brush. This kind of processing has higher requirements on the surface of aluminum or aluminum alloy plates.
Generally, it is made on a brushing machine or a rubbing machine. Use the axial movement of the upper group of grinding rollers to brush on the surface of the aluminum or aluminum alloy plate, Draw a wave pattern.
It is also called optical rotation, which is a kind of silk pattern obtained by using cylindrical felt or grind nylon wheel to install on a drilling machine, blending polishing oil with kerosene, and rotating and polishing the surface of aluminum or aluminum alloy plate. It is mostly used for decorative processing of round signs and small decorative dials.
It uses a small motor with a round felt on the shaft and fixes it on the table, at about 60 degrees from the edge of the table.
In addition, a pallet equipped with a fixed aluminum plate for pressing tea is made, and a polyester film with straight edges is pasted on the pallet to limit the thread competition. Using the rotation of the felt and the linear movement of the carriage, a thread pattern with the same width is rubbed on the surface of the aluminum plate.
The role of aluminum alloy wire drawing
The effect obtained by wire drawing will have a very fine convex and concave effect. Wire drawing is a repair process. Because there are some scratches on the metal surface, use a wire drawing machine to make consistent scratches on the whole surface (reduce the wall thickness) --- cover the scratches, it is best not to (processed After work hardening, it will change the performance). But scratches are difficult to avoid, so they are often used. Drawing not only brushes off the scratches on the surface of the aluminum plate, but also has the effect of beautifying the appearance of the aluminum plate. (There is also a "hot stamping" process (anodized aluminum transfer), which can also make a similar effect on the surface of plastic parts.)
As aluminum alloy parts may be in a humid working environment or assembled with other parts of different materials, in order to improve and ensure the wear resistance, corrosion resistance and visibility of the parts, magnesium alloy parts must be surface treated. The pretreatment will affect the subsequent spraying. During the manufacturing process, the parts may be contaminated by some contaminants such as grease, oxides, lubricants and foreign matter, and these residual impurities must be removed.
Generally, the pretreatment of aluminum alloy parts can be divided into four categories: mechanical cleaning, solvent cleaning, lye cleaning, and acid cleaning. These methods can be used alone or in combination. Pay attention to the supply of abrasive powder and water during the polishing process, and the polishing should be very bright!
|Material||Aluminum, stainless steel and other metal materials can be brushed and polished|
|Surface treatment||Common chemical treatments for aluminum alloys include chromization, painting, electroplating, anodizing, and electrophoresis. Among them, mechanical treatments include wire drawing, polishing, sandblasting, and polishing.|
|Main process||⑴Filling extrusion stage; ⑵Advection extrusion stage; ⑶Turbulent extrusion stage.|
|Quality control||Strict quality control in the whole process of coordinate measuring machine from material to packaging.|
|Usage||According to requirements for different heat treatment|
|Custom drawings||Accepts automatic CAD, JPEG, PDF, STP, IGS and most other file formats.|