Special engineering plastics, also known as high-performance polymers, are generally developed according to the needs of special applications. Compared with general-purpose engineering plastics, their performance is more excellent and unique. The long-term use temperature is above 200 ° C.
PPS is a white, highly crystalline polymer with a density of 1.34. Its excellent mechanical properties, tensile strength and flexural strength are better than PA, PC, PBT, etc., has extremely high rigidity and creep resistance, but its brittleness is large, notched impact strength is lower, lower than PA, PC, PBT Higher than POM. After adding glass fiber reinforcement, its mechanical properties are better. PPS is an inert substance and non-toxic.
Nitronic 60 high-strength stainless steel Compared with cobalt-containing and high-nickel alloys, Nitronic 60 stainless steel offers corrosion resistance and wear resistance at extremely low cost. Its overall corrosion resistance is better than Type 304 in most media.
1. For the guide rails of different shapes, which appearances should be controlled separately from the straightness errors of the planes?
Answer: The common shapes of machine tool guides are rectangular guides and V-shaped guides. The horizontal appearance of the rectangular guide rail controls the straightness of the guide rail in the straight plane. Both sides of the rectangular guide rail control the straightness of the guide rail in the horizontal plane. As for the V-shaped guide rail, two oblique appearances are used to form the guide rail, so the two oblique appearances control both straightness errors in the straight plane and straightness errors in the horizontal plane together.
As a special forming technology, pressure casting has been widely used in many industries and fields, especially for large-scale production of automobiles, motorcycles, internal combustion engines, electronics, instrumentation and aerospace industries, which has become an integral part .
While removing the burrs, the internal stress of the material can also be reduced, which will not affect the later use performance due to uneven force. During the sandblasting process, the adhesion of the coating film can be improved and the basis for increasing the thickness of the oxide film It is convenient for other machining, and the industrial aluminum profile products after physical and chemical treatment have higher surface corrosion resistance and longer service life.
The reason why people evolved from apes is with our hands, but they ca n’t rely on hands alone, so they must have tools to assist them. Think of human ancestors who are really smart. In order to use tools to process more easily, the machine tool’s earliest prototype tree lathe was born, about 2,000 years ago.
There are many grades of aluminum alloy materials. Different grades of materials have different elements and contents. Different element contents determine different physical and mechanical properties, which in turn determines that different grades of materials are suitable for different fields and products. Then Xiaobian today In exchange with you, the differences and application fields of the two most commonly used aluminum plates 5083 and 6061.
As we all know, aluminum alloy is an important industrial raw material. In aircraft structures, in order to reduce weight, a large number of thin-walled parts made of aluminum alloy are used. Due to their relatively low hardness and large thermal expansion coefficient, they are prone to deformation during machining of thin-walled and thin-plate parts. From the perspective of machining technology, some measures can also be taken to minimize the machining deformation of the material. There are many reasons for the deformation of aluminum alloy parts. In addition to improving the performance of the tool and using the aging treatment to eliminate the internal stress of the material, it is related to the choice of material, part shape, production conditions, cutting fluid performance, and machining method.
Compared with mold steel, ultra-thick mold aluminum plate has significant advantages:
1. The mold aluminum is lightweight. Because its density is only 36% of that of general mold steel, the motion inertia is relatively low. It is easy to accelerate and decelerate during the production process, which can reduce the loss of machinery and molds.