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By Sunny Tang
The quotation of precision machinery parts is mainly composed of three points: First one is Machining material, second is precision machining cost, and the third one is management cost. Every point will affect the price. Kanou Precision keep to take “Creat benefits to the customer” as the cause of action, and constantly to increase the benefits and reduce the cost for the customer.
The customer sends as attachment drawing to Kanou Precision for quotation, This Precision Machined component is a plate. Customer required material is tin bronze, and it has several positions with High precision. Tin bronze material is relatively soft, The machining cost will be higher to sure these high precision sizes. and it will use electrical discharge machining, it will take a long time to do this processing. But we still gave the quotation on time according to the customer's requirements, the cost is relatively high.
At the same time, We tried to ask the customer about the purpose of choosing tin bronze as the material, and what requirements he wants. His main request has two points: One is the precision machined part must be Completely nonmagnetic, secondly, it must be wear-resisting. After understanding the customer's quality requirements, Kanou Precision’s sales and technical engineer have the meeting to discuss this project immediately.
After much thought, we thought of replacing the material as tungsten copper. The tungsten copper can meet all character that tin bronze have. Even though the cost is higher than tin bronze, but tungsten copper can reach more high precision on processing, and the machining cost is much lower. the hardness and toughness of tungsten copper are better than tin bronze, and the wear-resisting is also better.
so it will be a good proposal to change the material as tungsten copper. then we put this proposal to the customer immediately , and also make new quotation to him to compare. It saved 600RMB/piece compared with the first quotation. Customer full of praise for us after checking this suggestion, as this proposal not only solved all requirements and have better quality, it also reduced much cost for them.
Kanou Precision not only provide precision machining service, but also provide a better solution. No matter you have precision machining request, or machining solution request, we can meet all of your requirements. If you have any question or inquiry, please feel free to contact us. We will do our best to serve you.
By Sunny Tang
Polishing technology is widely used in precision machining field, It’s very important processing that no matter for precision machined parts or Mold Parts. With the wide application of hardware products, the appearance quality requirements for hardware is becoming more and more higher, then the requirements for surface polishing will also be higher, and the roughness requirements for mirrored and highlighted surface products is especially higher, so the requirements for polishing also becoming higher and higher. Polising Not only increases the beauty of the precision machined parts, but also can improve the Corrosion and wear resistance of the material surface for precision machining parts, it also Convenient to Injection molding processing such as making plastic products easy to demold, reduce the production of injection cycle etc.
A:Rough polishing and grinding: The surface was normally rough after processing of Lathe, Grinding, CNC, cutting or EDM, It need be polished by using oilstone, Use kerosene as the lubricant,the General order of use will be #180 ~ #240 ~ #320 ~ #400 ~ #600 ~ #800~ #1000.
Whetstone polishing is very important and difficult processing, According to the different specifications of processed products like automotive parts, Cross lapping was performed equably at an Angle of about 70 degrees, The optimal round trip range is about 40 ~ 70 mm. Whetstore processing will also be changed according to the material for machined parts, In order to save the time, they will choose #400 to start.
B: Normal Polishing mainly use sandpaper and kerosene.After Whetstone processing will be sanding paper, When sanding paper, pay attention to the round edges, sharp corners, round corners and orange peel appears. so the process of whestone should be done with high precision. The important point for Sanding paper: Sand paper is intersected with hard sticks for grinding like Whetstone processing , and the grinding frequency of one side of sand paper is about 10 ~ 15 times. If the grinding time is too long, the abrasive force of sand paper will be reduced, and then it will lead the surface finish be uneven( This is one of the reason for orange peel appears). sanding paper usually use bamboo piece to grind, Actually the optimal ways is use the wood bar with less elastic or aluminum bar with Low hardness to grind at a 45 degree angle. The grinding surface should not be rubber or highly elastic materials, it can be grind at Acute Angle if the shape can’t grind at 45 degree angle. The Numbers of sandpaper are #220~ #320~ #400 ~#600~ #800 ~#1000~#1200~#1500. In fact #1500 sandpaper is only suitable for hardened die steel (above 52HRC) and not for prehardened steel as this may cause surface burns to the prehardened steel.
C:Precision polishing mainly use diamond paste. If use polishing wheel that mixes diamond abrasive powder or paste to grinding, The paste and polishing wheel can remove the Grinding crack that remained by #1200 and # 1500 sand paper. and then polishing by using felt and diamond paste.It can use the clean polishing chamber in mold processing workshop directly if the polishing precision is Ra0.2, If the polishing precision is very high, then it must use an absolutely clean space to process. It will scrap the polishing surface in high precision if the space has Dust, smoke, dandruff and spittle.
Our Kanou Precision use these polishing technology to service the customer, and also provide kind of solution for customer’s project. We always provide the precision machining part, cnc machined part, CNC turned part, CNC millded part, Mechanical components, automotive spare part to customer, Especially for mass production auto part, these all need this polishing technology, and we received highly praise from customer. We will keep to learn more polishing skills, and bring more advanced polishing tool and meterial to provide more high precision spare parts to customer.
Do you want to know more knowledge about technical skills? pls check this link for more: www.kanouprecision.com/blog/