The water supply system required for equipment testing consists of a hot water system and a cold water system, both of which usehigh-performance water pumps, andlt adopts fully automatic frequency conversion control, only need to manually set the water pressure value on the man-machine interface and turn on the water pump switch. Among them, the refrigeration system has two functions of cooling and auxiliary heating. When the temperature is high, the refrigeration is turned on, and vice versa. , Turn on auxiliary heat (auxiliary heat when the water temperature is low in winter). 1. The heating system provides the hot water temperature required for the test, and the refrigeration system provides the cold water temperature required for the test. The cold and hot water temperatures can be easily set and are automatically controlled by a thermocouple and PLC. The temperature control accuracy can reach ±2°C; 2. The cold water pump water supply system provides the cold water pressure required for the test, and the hot water pump water supply system provides the hot water pressure required for the test. Both the cold and hot water pressures are controlled by constant pressure frequency conversion. The closed-loop control principle is adopted and 0.5 is installed in the pressure test pipeline. The high-precision pressure sensor detects the pipeline pressure value in real time, and converts it into a 4-20mA signal and transmits it to the PLC signal acquisition module. The PLC outputs the corresponding signal to the frequency conversion according to the preset program and the pressure value set by the touch screen. Through the conversion of the output frequency of the inverter, the control of the constant pressure value of the output water pressure of the pressure water pump is realized: 3. The cold and hot supply and return water valve system is controlled by the PLC system. Through the touch screen parameter setting and the PLC built-in program, the alternate supply function of cold and hot water to the test sample can be realized, and the cold and hot water can be recovered separately. The circulating water can be reused after reheating or cooling to achieve the purpose of water saving and energy saving; 4. Drive device: The pressure used in the life test is automatically controlled by an air cylinder, and the drive head is equipped with soft materials to ensure that the pressing surface of the test sample is in flexible contact, and the effect of protecting the product is obtained; 5. Tooling and fixture: use the standard water tank required by JC987-2005: 400X175X300 (mm), the water tank has a hole inside, and the size of the hole can be changed to facilitate the realization of the joint, and obtain products of different specifications within the requirements of the test standard; 6. The electronic control system adopts PLC and touch screen, which can set the total test times, the test ratio of large/small gears, the pressing hold time, the stop water...

The difference between sand blasting machine and shot blasting 1. The working principle is different: Shot blasting uses a high-speed rotating impeller to throw small steel shots or small iron shots out to hit the surface of the part at high speed, so the oxide layer on the surface of the part can be removed. Sandblasting is a method of using compressed air to blow out the quartz sand at high speed to clean the surface of the part. 2.Different materials used The steel shots and iron shots used in shot blasting are not actually shots. To be precise, they are small steel wires or small steel rods. They only look like shots after a period of use. The so-called sandblasted sand is just river sand, which is no different from that used for construction, except that the sandblasted sand is screened, contains less mud, and has a particle size specification. Of course, some industries are also different. For example, real steel shot is used for shot blasting in the shipbuilding industry, and metal ore (not river sand-quartz sand) is used for sand blasting. 3. Different functions: The main function of sandblasting is to remove rust and scale on the surface, such as parts after heat treatment. Shot blasting has many functions. It not only removes rust and surface oxides, but also improves surface roughness, removes machining burrs of parts, eliminates internal stress of parts, reduces deformation of parts after heat treatment, and improves surface wear resistance of parts. Pressure capacity, etc. 4. Different materials used: The steel shots and iron shots used in shot blasting are not actually shots. To be precise, they are small steel wires or small steel rods. They only look like shots after a period of use. The so-called sandblasted sand is just river sand, which is no different from that used for construction, except that the sandblasted sand is screened, contains less mud, and has a particle size specification. Of course, some industries are also different. For example, real steel shot is used for shot blasting in the shipbuilding industry, and metal ore (not river sand-quartz sand) is used for sand blasting.

1. The fuselage is a solid hollow frame work piece. The upper part supports the indenter part of the rotating arm. When pressing, the rotating arm hooks the fuselage so that the pressing force is absorbed by the fuselage. The fuselage and the shock mechanism are bolted together, and the rotating arm In the indenter part, the indenter is fixed on a rocker arm that can be rotated, and the indenter has a screw elevator that can be adjusted to the distance from the indenter to the sand box according to the height of the sand box 2. The swing arm controls the reciprocating movement of the cylinder piston through a hand-pulled valve to realize the movement of the positive arm and swing arm. 3. The ejection structure is composed of two ejection cylinders, connecting rods, balance shafts, ejection tables, ejection rods, etc. When the ejection cylinders are activated, the connecting rods, balance shafts, and ejection tables are driven to eject the four ejector rods at the same time. Moulding from the sand box. 4. Shock compaction structure. Adopt spring micro-vibration pneumatic compaction structure, compaction shock increases vibration. The clamping cylinder locks the vibrating cylinder when the mold is drawn, and the clamping cylinder is released when the mold is dropped. 5. Pneumatic piping system: the input compressed air is removed by air filter to remove water and impurities in the compressed air, and then lubricating oil is injected through the lubricator to supply various pneumatic components and mechanisms, and the action of the machine is realized by the hand valve console . 6. Air supply and lubrication. The machine is operated by air source as energy source and oil as lubrication. The intake pressure and oil volume are respectively adjusted by the pressure reducing valve and the oil regulating valve. When the air source passes through the lubricator, the oil is sucked into the pipeline according to the siphon principle, and the mist enters the pipeline system for lubrication.