The process of the overall impeller milling process can be divided into: according to the processing part: (1) Slotting: The task is to roughly form the channel and leave a relatively uniform machining allowance for the blades on both sides of the channel. (2) Slotting processing: from the slotting position, the groove is expanded from the inside to the outside, and the surface of the tire is formed at the same time. (3) Leaf type finishing and root removal processing: For non-straight surface impellers, only the point contact processing of the ball edge of the ball end mill and the blade surface can be used. The purpose of root cleaning is to create a smooth connection between the hub and the blade root. The problem of the NC machining process of the three-dimensional curved surface of the aero-engine TC6 impeller is that the blade forming process uses a ball end mill and a cone ball end mill. The cutting speeds of the blade points vary greatly, and the surface of the machined surface is rough. During the surface forming process, the multi-axis linkage, the contact between the material to be cut and the cutting edge of the tool is constantly changing, and the cutting allowance is uneven. Under the combined action of cutting deep deformation, cutting vibration and surface hardening layer in the finishing of the blade, the blade will be slip-rolled on the semi-finished surface of the workpiece. If the blade cannot cut through the hardened layer, the cutting state is unstable and the surface is out of the surface. Profile deformation, precision control is difficult. Because CNC milling cutters provided by domestic and foreign manufacturers basically adopt common tool geometry parameters, they can not adapt well to the machinability of TC6 titanium alloy, with low efficiency, high cost and short tool life. This has caused bottlenecks in the mass production of engine impellers. Whether the tool geometry parameters are reasonable or not directly affects the performance of the CNC machining center. If the specific conditions of the workpiece are used, the orthogonal test optimizes the reasonable tool geometry parameters, and then uses the advanced powerful CNC grinding technology to “manufacture the tool†to produce the tool, which is very effective for improving the forming efficiency and reducing the cost of the foliar. New process approach.
(1) The existence of the hardened layer is an important factor that causes the ball end mill to finish cutting and cutting the metal when the metal is not cut or the cutting is too deep. Study the distribution of the thickness of the hardened layer on the surface after semi-finishing of the curved surface, and formulate a reasonable finishing allowance so that there is enough margin during the finishing to cut through the hardened layer, so that the cutting edge is cut under the hardened layer to improve the work of the cutting edge. Conditions to ensure precision of finishing. (2) In order to improve the cutting efficiency, the influence of the main geometric parameters on the tool wear during the cutting process of the ball end mill for CNC milling of TC6 material is studied, and the reasonable geometric parameters of the tool are optimized. The orthogonal test method was used to study the influence of the geometric parameters of the ball end mill on the surface milling process. The hardness and thickness of the hardened layer and the flank wear index (VB) of the planned test tool under certain cutting conditions were investigated. From the cutting test results of the nine kinds of knives, the rake angle is 0=12°, the relief angle is 0=8°, the land width br1=0.3 mm, and the helix angle=38°. The selection conclusions of the above-mentioned front and rear corners are different from those of the conventional titanium alloy in plane milling. The main reason is that the curvature change of the blade surface is active and the front angle is larger. The cutting edge can be sharpened and the cutting vibration can be reduced. Choosing a smaller back angle increases the blade strength, and the actual working angle of the tool changes continuously as the blade surface curvature changes. The vibration resistance and the strength of the blade should be the first consideration. They directly affect tool life.
(Finish)
Pedal Bin
1. Hands-free opening with a foot pedal to prevent the spread of germs.
2 The stainless steel body of the bin is fingerprint-proof, smudge-resistant, and easy to clean.3.Perfect way to store trash in your kitchen, office, wherever space is limited .
4. Inner compartments are removable and holds much crash.
FAQ:
1:How can I get the sample?
We can provide the sample for customers to check the quality.
Please kindly provide the delivery info for calculate the sample cost. If you have DHL /TNT/UPS/FEDEX account, please also kindly provide it to us.
You can do the payment of sample via T/T and PayPal.
2:How about the sample time?
Usually the sample time is 7~10 days after have the sample cost.
3:How long will it take for mass production?
Usually 45~60 days after have the deposit.
4:Can we have our logo or company name to be printed on your products or the package?
Welcome OEM.
5:what certificate can you provide?
CE,CB,GS,FDA,LFGB,ROHS are available here.
6:How can we get your monthly new products announcement?
Please join our mailing lists.
Compost Bin,Oval Shape Pedal Bin,Stainless Steel Dust Bin,Stainless Steel Pedal Bin
Jiangmen Wellway Houseware Co.,Ltd , https://www.hkwellway.com