Established In Jan 1996, OKE Precision Cutting Tools Co., Ltd. (Hereinafter Referred To As 'OKE'), With Registered Capital Of CNY 100 Million, Is A High-Tech Enterprise Specializing In Independent R&D, Production And Sales Of Cemented Carbide And CNC Cutting Tool Products. On 10th Dec. 2020, OKE Was Successfully Listed And Becoming The First Listed Company On The SSE Star Market In Zhuzhou City，Also The First Listed One With Cemented Carbide Tools As Its Main Business.

When producing PCD drill bits, it is necessary to understand what material the PCD drill bit needs to process. The work piece material is different, the clearance angle is also different, the material is hard, the clearance angle is small; the material is soft, the clearance angle is large. The larger the relief angle, the sharper the cutting edge, but the rigidity will be worse.

OKE Insists Its Business Conception“Obligation Keeps Excellence”, And Keeps In Line With The Orientation Of China's High-End Manufacturing Industry, Who Focuses On Localization And Import Substitution Of High-Precision CNC Tools. The Company Aims To Be An High-Tech Intelligent CNC Tool Preponderant Enterprise And Become A Leading Domestic And Internationally Renowned Comprehensive Supplier And System Service Provider Of CNC Cutting Tools.

The drill bit implements drilling by embedding two cutting edges in the workpiece. When drilling, the drill bit or the workpiece rotates, the drill bit enters the workpiece, and the cutting edge drills. The main role at this time is the rake angle. Compared with the rake angle of the PCD turning tool, the rake angle of the drill bit is diverse and complex, so the helix angle of the drill bit is generally regarded as the rake angle. Even if the drill has only one rake angle, it also has a chisel edge, and the closer it is to the outer edge, the larger the rake angle. The back angle is just the opposite, that is, the closer the back angle is to the outer edge, the smaller the back angle. Usually, PCD drills can be used to process workpieces made of aluminum alloy, silicon aluminum alloy, brass, bronze alloy and other materials.

OKE Is The Largest Manufacturer Of Carbide Saw Tips In China, And Its Product Technology Ranks Among The Forefront Of China. In 2019, The CNC Carbide Inserts Output Is Top 2 In China. After Years Of Technological Exploration, OKE Has Mastered The Key Technology System For Manufacturing Of Tungsten Cemented Carbide, CNC Carbide Insert (Tools) And Whole Process Of Integrated Application, Successfully Solved The Control Problem Of Cemented Carbide Performance Stability And Accuracy Consistency. OKE Is Able To Stably Produce Cemented Carbide Tool Products With Complex Structures Such As Ultra-Fine And Low-Cobalt, Ultra-Fine And Ultra-Thin, And Functional Gradients Etc. .The PVD Coated Inserts For Stainless Steel Processing And CVD Coated Inserts For Steel Processing Independently Developed By OKE Have Reached The International Advanced Level And Can Replace Imported Products.

The apex angle is the angle formed by the two cutting edges, usually 118°. 118° is not calculated by theory, but an empirical value. Although 118° is the standard angle, in actual processing, the vertex angle is often changed according to the workpiece material. Cast iron, steel, brass, hard alloy and other workpieces often use 118° apex angle; low hardness, good machinability, phenolic plastic, hard rubber, etc. often use 60°~80° apex angle. In addition, the workpiece material with higher hardness adopts an angle of 125°~135°.

The chip pockets on the side of the drill body are used to discharge the chips and transport the cutting fluid to the cutting area. In order to keep the edge of the chip flute smooth, a tool can be used to sharpen the chip flute. The number of chip flutes and cutting edges is the same. For example, a reaming drill has three cutting edges corresponding to three chip flutes, and four cutting edges have four chip flutes. The angle between the tangent of a point on the edge of the chip flute and the axis is called the helix angle. The helix angle varies with the material of the workpiece. However, the helix angle is different from the top angle and the back angle. It is not grinded by the worker at will, but is determined by the manufacturer during the production of the drill. Therefore, the worker can only choose the helix angle according to the material of the workpiece.

The part between the two blade backs when the blade is the outermost end of the drill body. The transverse dimension between the two cutting edges represents the standard size of the drill (drill diameter). Since the blade has to contact the inner wall of the workpiece and guide the drill, the wider the width of the blade, the better. But too large a width will increase the friction between the two and cause the drill bit to wear too fast. For this, a shovel back must be installed. However, when processing workpieces that have special requirements for hole accuracy and machined surface, a double-edged drill with a blade width four times that of ordinary drills is usually used.

When using PCD drill bits, what impact will the rake angle of the PCD drill bit have on processing? We need to understand the role of PCD drill rake angle.

The diameter of the drill is getting smaller and smaller from the outer corner to the shank. When drilling, the drill bit rubs against the hole wall, and the hole gradually increases. The inverted taper is to prevent the cutting edge from always rubbing with the hole wall when drilling the hole, which causes the cutting heat to increase. Therefore, the diameter of the working part of the drill is not equal, and the diameter of the drill is marked at the empty tool. Of course, there is no inverted taper for drills with a diameter of less than 1mm.

Generally speaking, PCD drill bits have relief angles. The drill tip has a relief angle, and its angle is called the relief angle of the drill point or the relief angle of the cutting edge. The relief angle is to prevent the machined surface from being worn away behind the drill tip when drilling.

OKE Always Adheres To The R&D Concept Of'close To The Market For Improvement And Lead The Market For Research And Development', And Formed A Technical R&D Team Composed Of Chief Technical Experts, R&D Engineers, New Product Realization Echnologists, And Expert Consultants. At The Same Time, OKE Has Carried Out In-Depth Industry-University-Research Cooperation With Many Universities Such As Central South University, Sichuan University Etc.. By The End Of 2020, OKE Has Obtained 84 Authorized Domestic Patents, Include 11 Invent Patents, 49 Practical Patents, 24 Appearance Patents. At The Same Time, OKE Has Taken Part In The Formulation Of 3 National Standards And 3 Industry Standards. OKE Also Participated In A Number Of Technology And Industrialization Projects. OKE Is Not Only A New Material Enterprise In Hunan Province But Also A National High-Tech Enterprise, Who Had Established An Provincial Enterprise Technology Center And Known As The“Little Giant Enterprise”Of Hunan Province.