Diamond tool turning FRP durability and processing efficiency

Introduction: FRP is actually a glass fiber reinforced engineering plastic, which is a combination of glass fiber and epoxy resin or phenolic resin. FRP is a thermosetting plastic with epoxy phenolic resin as binder, glass fiber as filler and small amount of compounding agent. Products. Especially in high-silica glass reinforced plastics with a SiO2 content of more than 90%, these hard spots have abrasive properties during the cutting process, which causes serious tool wear, and the workpiece is layered, slag, and dust is serious.

FRP is not tempered glass. It is a combination of glass fiber and epoxy resin or phenolic resin. The glass fiber reinforced plastic is a thermosetting plastic product with epoxy phenolic resin as binder, glass fiber as filler and small amount of compounding agent. Especially in high-silica glass reinforced plastics with a SiO2 content of more than 90%, these hard spots have abrasive properties during the cutting process, which causes serious tool wear, and the workpiece is layered, slag, and dust is serious. The resin is burnt due to the high cutting temperature. When turning FRP, CDW20 grade diamond turning tool has the following processing characteristics: high tool durability, high turning finish, high processing efficiency, CDW20 grade generally without cutting fluid for dry cutting; if high speed or poor thermal conductivity of workpiece When the cutting temperature is too high, the water-based cutting fluid can be used for cooling.

(1) Tool material performance: CDW20 brand diamond tool is developed by Henan Superhard Materials Research Institute for turning FRP. Compared with carbide tool turning, it can improve tool durability by dozens of times.

(2) Tool geometry parameters: FRP is mostly brittle material. Such materials as high silica glass reinforced plastic sheets, molded materials and wound materials are among these materials. Only by properly increasing the rake angle and keeping the blade sharp, can the fiber be cut smoothly. Due to the small elastic modulus of FRP and large elastic recovery, in order to reduce the friction and make the cutting light, the front angle of the tool, due to the limitation of the blade structure and the strength of the blade material, Hualing superhard tool will design the tool according to the customer's specific conditions. Angle; strive to achieve the best cutting state, rich experience in tool sharpening technology makes the FRP high after smooth turning. After many verifications, CDW20 grade is used for turning FRP, adopting 7-11 degree back angle, 5-6 degree front angle , 2-3 degree blade inclination angle, can be rough-processed, can be finished. When this angle is adopted, it is not easy to produce a product to be cut, the tool does not vibrate, and the noise during processing is small;

(3) Cutting amount: cutting speed of turning FRP, when using cemented carbide tool, νC=40——80m/min, ap=0.1——4mm, f=0.2——0.5mm/r. When cutting with a CDW20 grade diamond tool, νC = 100 - 120 m / min. Processing efficiency is increased by 2-3 times. Moreover, due to the high durability of the tool, it is possible to contact several shifts without re-grinding the tool; save a lot of auxiliary working hours, use the CDW20 grade generally without cutting fluid for dry cutting; if the cutting temperature is too high due to high speed or poor thermal conductivity of the workpiece When high, water-based cutting fluid can be used for cooling.

Introduction to diamond tool grades and suitable materials for processing:

The diamond tool grades developed by Henan Superhard Materials Research Institute are CDW10, CDW20, CDW30; respectively suitable for finishing, medium finishing and roughing.

Diamond tools are suitable for processing materials in three main categories: non-ferrous metal materials, non-metallic materials and some composite materials:

1. Non-ferrous metal: aluminum alloy, babbitt alloy, brass alloy, copper alloy, lead alloy, manganese alloy, silicon aluminum alloy, silver, platinum, tungsten-based hard alloy, zinc alloy.

2. Non-metallic materials: Alumina, silicon carbide, polyurethane, plexiglass, graphite, sintered ceramics, bakelite, cerium oxide, ceramics, epoxy resin, glass, glass ceramics, rubber and various plastics.

3. Composite materials: asbestos, epoxy glass fiber, carbon filling material, nylon filling material, phenolic filling material, polyvinyl chloride filling material, silicic acid filling material.

The main performance indicators of this type of diamond tool:

1, the hardness can reach 8000HV, 80-120 times of cemented carbide;

2. The thermal conductivity is 700W/mK, which is 1.5-9 times that of cemented carbide, even higher than PCBN and copper, so its heat transfer is more rapid;

3. The friction coefficient is generally only 0.1-0.3 (the friction coefficient of cemented carbide is 0.4-1), so the cutting force can be significantly reduced.

4. The thermal expansion coefficient is only 0.9×10 -6——1.18×10 -6, which is only 1/5 of the cemented carbide. Therefore, the CDW20 grade diamond cutter has small thermal deformation and high processing precision.

5. The affinity between the cutter and the non-ferrous metal and non-metal materials is very small. During the processing, the chips are not easy to adhere to the tip of the knife to form a built-up edge.

Conclusion: CDW20 brand diamond cutter not only has high hardness, but also excellent toughness, not only solves the problem of not wearing the traditional tool, but also solves the problem that the diamond tool often collapses due to large brittleness. When turning FRP, CDW20 grade diamond tool exhibits high tool durability, high turning finish and high processing efficiency.

Portable Power Station

Jiangmen Dilin Lighting High-Tech Co., Ltd. , https://www.jmdilinlighting.com