Two typical terminal characteristics commonly used in signal products are introduced. The selection methods are analyzed in detail, including clearance wiring capacity and current load capacity. There are many kinds of common terminal wiring methods such as terminal block, clearance and wiring capacity. For example, the welding crimping frame shrapnel crimping piercing insulation layer is connected with the top inlet wire hoop and the socket type connection and plug-in connection. The paper introduces the crimping frame and shrapnel crimping commonly used in railway signal equipment. The crimping frame crimping system has the structure shown in the figure and requires no maintenance. The wires do not require pre-treatment, whether rigid or flexible, with or without tubular ends, and can be connected using spring pull-back terminals. The self-locking system has good anti-vibration performance, and the frame of the crimping frame structure is a steel structure, which can ensure the pressing force. For example, when the torque is at the torque of the terminal, the crimping force is copper to ensure conductivity. When the torque is less than the torque of the terminal, the voltage drop is smaller than that of the crimping system of the shrapnel. The shrapnel system of the shrapnel system is shown in the figure. The characteristics of the anti-loose structure line do not need to be pretreated, whether rigid or flexible, with or without tubular ends. , can be connected using the spring pull-back terminal. The shrapnel part of the shrapnel is made of special stainless steel with good elasticity and fatigue resistance. The bus bar is made of electrolytic copper material and has good electrical conductivity. Pry the screwdriver into the operating well, the screwdriver presses the spring and the terminal is opened. At this point, insert the wire into the terminal block and pull out the screwdriver. The wire can be clamped between the spring and the bus bar. The terminals of material signal products should be selected from well-known brands of industrial grade or above. Good terminal blocks have many unique features in material selection. We care about the strength and corrosion resistance of metal materials. Insulation materials should pay attention to the environmental protection and toughness of insulation performance flame retardant working temperature.
Vitrified Grinding Wheels mean grinding wheels in ceramic bonded. Vitrified grinding wheels can be superabrasive grinding wheels like diamond grinding wheel or CBN Grinding Wheels. It also can be abrasive grinding wheels such as white aluminum oxide grinding wheel,pink grinding wheel,silicon carbide grinding.
Vitrified grinding wheel is only one type of bond, which is ceramic, it can be in any type of abrasive.
The main ingredient of vitrified bond are vitreous material with low melting point, such as borosilicate glass, lead glass, etc.It is widely used in various grinding methods such as outer circle, inner circle, flat surface, centerless, etc. It is the most commonly used bonding agent for abrasive tools.
Vitrified bond is characterized by high chemical stability, almost can work in a variety of cooling media, small elastic deformation, brittle, can be made into a variety of hardness levels of grinding tools to adapt to the processing of various hardness of the workpiece. Vitrified bond has good self-sharpening.
The grinding efficiency of single crystal diamond with vitrified bond grinding wheel is higher than metal bond grinding wheel. The wear ratio is very small and the processing cost is low. Therefore, the grinding efficiency of single crystal diamond with ceramic bond grinding wheel can be greatly improved.
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