The testing machine, in a broad sense, is an instrument that verifies the quality or performance of a product or material according to design requirements before it is put into use. Then, today we will introduce some common faults and troubleshooting methods of the testing machine:
1. The oil supply valve has a low stiffness of the spring or a blockage of the throttle needle cavity. The main performance: each load can only reach a certain load, when the load can no longer rise, the oil return to the oil pipe is large.
2. The gap between the oil supply valve damping needle and the orifice is too small. The main performance: each load can only reach a certain load, when the load can no longer rise, the oil return valve of the delivery valve is large.
Remedy: Take out the damper needle and use a file to remove a part of the damper along the axial direction of the damper.
3. The belt that drives the oil pump is loose and slippery. After loading to a certain load, it can no longer rise, and the oil return valve has no oil flowing out, and the oil pump has no working sound.
Remedy: Loosen the motor fixing screw, adjust the position, tighten the belt, and tighten the motor fixing screw. If the belt is too deformed, you have to replace it with a new one.
4. The viscosity of the oil used in the test machine is too low (the oil is always flowing out of the return valve of the delivery valve when loading). Generally used medium-viscosity mineral oil, no water, acid and other mixtures, does not decompose at room temperature, does not become thick, if necessary, can be measured with a viscometer. Improper use of oil can clog valves and oil lines and can cause vibration or leaks in the pipeline. It is best to use oil as required by the instructions.
5. The oil pressure system is seriously leaking. The oil leakage of the oil system is generally present at the connection of the buffer valve, the return valve, the oil supply valve, the oil pump and the pipeline. After the pad is added, the screw can be tightened. If the gasket is broken, it must be removed and replaced with a new one. The gasket should be made of copper or aluminum alloy.
6. The fuel tank is not enough. When loaded to a certain load, the oil return valve of the oil delivery valve has a sound of “噗†and “噗â€, and there is little oil and bubbles. When the load can no longer rise, the return pipe has no oil flowing out.
Remedy: Add oil to the test engine tank until you see that the oil level reaches half of the oil sight.
7. The oil collector of the oil pump is not pressed against the pump body. In this way, each load can only reach a certain load, and the load can no longer rise, and the oil return valve has no oil flowing out.
Remedy: Tighten the fixing screws at the rear of the pump with a wrench. If there is still a problem, remove the oil collector and add a gasket between the oil collector and the pump body.
8. The oil pump plunger is rusted. Main performance: During the loading process, the oil return valve return oil is not continuous or fluctuating. When a certain load can no longer rise, the return pipe has no oil to flow out.
Remedy: Remove the plunger and re-polish.
9. The test machine with safety valve can automatically open when the maximum load exceeds 3%~5%, to ensure that the test machine will not be damaged due to excessive overload. When the safety valve is not properly adjusted, or the valve tip and hole are not tightly closed, Will make the pressure not high.
The adjustment method is to disassemble the safety valve adjusting screw of the testing machine, check the damage of the parts for replacement, excessive overload, screw the screw downward, and vice versa.
10. The working clearance between the working piston and the cylinder is too large, and the gap is too oily, which can be seen from the oil spill and other outlets. The method is to thicken the viscosity of the oil. If the problem cannot be solved, after the precision measurement, the piston and the cylinder should be exchanged at the production plant.
11. The force-measuring piston has a large clearance between the force-measuring cylinder and the high-tonnage position, which can be seen from the lower part of the force-measuring cylinder. Under normal circumstances, there is intermittent dripping oil when there is no dripping oil or high tonnage. If it flows out in a line, the force measuring piston should be replaced. When observing the oil leakage, pay attention to the difference between the oil leakage of the joint and the oil leakage of the cylinder plug, and the wrong judgment cannot be made due to the wrong look.
12. The piston and piston sleeve in the oil delivery valve are damaged or the spring is soft. In this way, the load that can be achieved with each load is basically unchanged, and the oil delivery valve is noisy. When the load can no longer rise, the oil return of the oil return valve of the oil supply valve is large. The piston and piston sleeve should be removed and ground. If the damage is serious, the spring should be replaced.
Concerned about surprises
Label: What are the common faults of the test machine? How to eliminate the fault? Test machine fault check and elimination
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Superabrasives are tools used in precision grinding,precision cutting,precision polishing and precision drilling,like Flexible Diamond Abrasive.Superabrasive materials attach to a wheel,blade and drill to make Superabrasive Grinding Wheels,cutting balde and drilling bit.The reason some abrasives are Superabrasives is due to their extraordinary hardness,unparalleled performance,and longevity.
What are Superabrasives?
Abrasives that belong to the Superabrasive family includes,Industrial diamonds: an industrial diamond is a non-gem quality small diamond that is for abrasives,cutting,and drilling tools.
Cubic boron nitride (CBN): Usually called CBN it is the second hardest cutting tool material after a diamond.
Polycrystalline: Is an abrasive material that has a multiple collection of crystal grain structures with individual orientations
CVD Diamond: These are synthetic diamonds made by a process known as chemical vapor deposition.CVD diamonds grow from a hydrocarbon gas mixture. They are extremely hard,have a high thermal conductivity that is five times that of copper. They also have broadband optical transparency,are chemically inert,and only reach graphitization at very high temperatures.
Nanodiamonds: These tiny diamonds are the product of a controlled explosion. Sometimes called a detonation nanodiamond (DND) or an ultradispersed diamond,as this is how they form.
Industries That Use Superabrasives
A great number of industries use Superabrasive grinding wheels and the coated abrasives subsection of the abrasives industry continues to grow. Industries that are prime buyers of Superabrasive grinding wheels are,
| Aerospace |
Jewelry
|
| Aluminum Mills | Leather Tanneries |
| Automotive | Machinery |
| Bearings | Marble |
| Boat Building | Medical Instruments |
| Brick & Tile | Metal Fabrication |
| Broaches | Metallurgical Labs |
| Ceramic Products | Motor Vehicle Parts |
| Construction | Oil Field Equipment |
| Contract Machining | Paper Mills |
| Copper Mills | Plastics |
| Cutlery | Precision Gages |
| Cutting Tools | Railroad Equipment |
| Dental Equipment | Rubber |
| Forest Products | Saw Blades |
| Foundries | Ship Building |
| Gears | Springs |
| Glass Products | Steel Mills |
| Golf Clubs | Valves |
| Granite | Welding |
Advantages of Superabrasives
The advantages of Superabrasive grinding wheels are more than extraordinary hardness,unparalleled performance,and longevity. These three features of Superabrasives are the core of many advantages manufacturers gain by an aggregation of services that normal abrasives simply cannot deliver.
These include:
Less expensive tooling and fixturing costs
More wheels on the spindle,smaller wheels,multiple operations
Less floor space needed for manufacturing
Virtual elimination of wheel wear
Automated CNC machines,less labor intensive operations requiring less training
Consistent surface speed from part to part
Better overall throughput with fewer machines needed
Improved Material Removal Rates,Lower Per Part Abrasive Costs and higher speeds
With Superabrasives,production increased by automated CNC equipment,industries have found one way to compensate for the lack of availability of skilled labor. With fewer machines needed,so is fewer workers. With Superabrasives CNC,automation is more concerned with defining a manufacturing process using machine capabilities and mechanization. There is less concern on operator technique. A properly defined process,combined with automatic loaders make for equipment that is almost running itself.
Industry Outlook
Future growth of the abrasives industries will primarily be in Superabrasives. Currently,research and development of Superabrasives are taking place in the following areas.
Custom designed [hard to grind" materials in an increasing number of industries
Creep or deep feed grinding
High-speed,high-performance grinding of hardened steel
Form grinding,sometimes with electroplating,in high precision,high-removal,and high-surface quality applications
CNC-control of line grinding machines
Other abrasive technology developments with Superabrasives are likely to occur in using CVD for the best bonding of coatings to diamond wheels
Electroplated Diamond Products
Superabrasives Precision Cutting,Superabrasives Precsion Polishing,Superabrasive Grinding Wheels,Profiled Superabrasive Grinding Wheels,Flexible Diamond Abrasive
Hans Superabrasive Material Co., Ltd. , http://www.hansuperabrasive.com