Shot peening technology
There are three types according to shot blasting application. 1. shot blasting cleaning 2. shot peening 3. shot peening forming shot peening is traditional surface treatment technology, the principle is : by means of impacting of high speed shots on the workpiece, to make it plastic deform in order to produce residue stress, and increase the bent/twist fatigue strength of parts, improve stress corrosion splitting performance. The shot peening is a process of cooling, that is numerous round shots beating on the surface, like a micro hammer beating on the surface to produce small indentation and hollow.
You can imagine, in a pressure stress area, split is hard to form or extend. As almost all the fatigue and stress corrosion occur on the surface or near the surface, thus by shot peening, the lifetime of spare parts can be extended. The residual stress by shot peening must reach half of the tensile strength of part material.
The notable enemy of metal fatigue failure is tensile stress. The production of tensile stress is due to alternate load by exterior or residual stress of production process like welding, grinding. Tensile stress tries to stretch or pull the surface to cause split in the final.
Application
1. Aviation
2. Automobile industry
3. Locomotive industry
4. Electric energy
5. Others
Digital control shot blaster/peener for electric energy industry
In the electric industry, the shot blasting technique can improve the performance of steam, fuel gas turbine, like the rotary table, blade, spare parts and equipment, meanwhile can decrease erosion, abrasion fatigue and stress split.
On the aspect of transmission element, gear and axis, shot peening technique is used to prevent the invalid of spare parts, but recently, shot peening is used more and more in increasing the carrying capacity of key structure, like the supercritical power plant pipe minor-caliber steel tube inner wall shot peening; overload bench test of screw drive and driven bevel gear of automobile is also testified.
Wind power booster gear shot peening machine tool
As the wind power turbine is getting larger and larger, the gear box is more and more complicated. Due to gear invalidity the equipment stop loss is becoming expensive. After the wind power turbine is installed, it is under the action of estimated high carrying load stress, at this time, the high contact stress of booster gear and bearing surface will cause crack, hollow, scratch, and other non-recoverable abrasion.
Wind power electric generator has high requirement for gear box: small volume, light weight, high reliability, long life, easy to maintain. What ever gear is used, the gear will need hardening and strengthening treatment to suit special environment requirement like the wind farm, especially to reduce the noise of wind fan when it is rotating. The hardening function is to increase the gear hardness, but it will misplace and deform the gear material, so it has to be shot peening thereupon.
Wind power bearing control automatic shot peening equipment
Shanghai Liangshi designs and manufactures wind power and ship machinery equipment bearing control automatic shot peening equipment for a famous bearing company in Dalian, in the wind and ship industry corrosion proof requirement of bearing is high, the surface treatment precision is high, and the workpiece diameter is large, so Liangshi develops automatic rotary mechanism and 3-axis manipulator automatic shot peening equipment, the workpiece automatic rotary mechanism adopts imported motor driving rotary worktable to rotate, the rotary speed is frequency adjustable, the workpiece rotate stable. As machined surface of turntable bearing is many and complicated, 3-axis manipulator is adopted, the X-axis shift precision is no more than ±1mm, it can fully satisfy the automatic shot peening requirement, Z-axis is similar with X-axis, configuring linear bearing to make it more accurate and stable, realize digital control; A-axis can work when 2-4 guns spray guns are swaying at the same time between 95~+95
Wind power fan blade shot peening machine tool
The fan turbine is under vibrating stress of wind power in a long time, especially under turbulent wind field environment. The rotary blade is forced to vibrate under this periodical external force action, and sometimes this vibrating is sudden, resonance in a short time leads to appearance of split, the vibrating stress is large and destructive force is strong, thereby split and even break is produced. Besides, as the vibration of blade and neighboring blade is mutual interfered and destructive force will cause the split and break on the blade surface. In the operating process of motor, such as high speed object impacting on the blade, it will easy to cause split. So when designing the motor blade, wind strength, drive model, metal anti-fatigue feature of rotary blade need to be fully considered.
At present, the most economic and effective way to solve the motor blade metal fatigue is shot peening. By bringing in a residual press stress on the surface of blade surface, it can offset or overcome the destructive tensile stress to improve anti-fatigue strength of blade.
minor-caliber stainless steel tube inner wall shot peening equipment
Along with the development of supercritical power plant and related industries, the inner wall oxidation resistance requirement of stainless pipe like the stream pipe is increasing continuously, so the manufacturing process of equipment is required to be more advanced. Many years of research by expertise at home and abroad shows that, inner wall of stainless steel pipe can be improved of its oxidation resistance by shot peening, the experiment shows that the inner wall micro structure of stainless steel can be changed by shot peening, in the process of using, all kinds of elements ( especially Cr) will change to improve oxidation resistance greatly. The thickness of oxide layer will 0.07%~1.7% of which is not shot peened, and the oxide layer will not fall off. At present the stainless steel pipe manufacturers in domestic all require to use the shot peening equipment to improve the oxidation resistance of inner wall, at the same time make the wall hardened.
Shanghai Liangshi
As the largest and strongest manufacturer in the surface treatment industry in China, our predecessor is Shanghai Research Institute, which means we've got the whole-chain technology related to the blasting, painting and coating process. With over twenty years experience in this industry, by adopting and developing domestic and overseas advanced technology, with a strong technical team and large production base, we will provide our customers with the most superior blasting and painting equipment, as well as the solution plan of the whole production line, our specialized engineer will make you customized design which can fully meet your requirements.
We have cooperated with many domestic and foreign companies, and wined trust of all our customers. Our after-sales system can solve the problems effectively to insure the normal operation of equipment. With the delivery of equipment, operation manual in English version is provided and installation can be done at spot by sending our engineers, as well as arranging technical training of your workers accordingly.
Our advantages:
l China earliest manufacturer in the surface treatment industry, with twenty years experience.
l A professional technical team composed of more than twenty engineers.
l Good-quality equipment with very long service-life, we use famous brand of elements in our equipment.
l Customized service to provide most suitable design and layout according to your special needs.
l By cooperating with ABB and Full automatic robot system can be provided.
l Good after-service and specialized training.
For more detailed information, pls enter our website: http://shlspt.en.made-in-china.com
