Turned parts refer to mechanical parts formed by the rotation of the workpiece on a lathe, covering internal and external cylindrical surfaces, conical surfaces, screw threads, and other rotating surfaces. CNC turning machining uses computer – controlled technology to automatically execute cutting operations based on a CAD model. The machining accuracy generally reaches IT11 – IT7 (and in some cases, IT6), and the surface roughness Ra is controlled within 12.5 – 0.8μm. Precision CNC turned parts need to go through strict quality control and testing to ensure performance under extreme conditions.
Before Operation
- Before starting work, use protective equipment as required. Tuck in the sleeves, and do not wear scarves or gloves. Female workers should tuck their hair into the hat. Operators must stand on the footboard.
- Conduct a strict inspection of bolts at various parts, travel limits, signals, safety protection (insurance) devices, mechanical transmission parts, electrical parts, and lubrication points. Start the machine only after ensuring everything is reliable.
- The lighting for various machine tools should use safe voltage, and the voltage shall not exceed 36 volts.
- Workpieces, fixtures, tools, and workpieces must be firmly clamped. For all types of machine tools, after starting, perform a low – speed idle run first. Start the formal operation only after everything is normal.
- Do not place tools and other items on the machine tool guideways and workbench. Do not remove iron filings by hand. Use special tools for cleaning.
- Observe the surrounding dynamics before starting the machine. After the machine starts, stand in a safe position to avoid the moving parts of the machine tool and splashing iron filings.
- During the operation of all types of machine tools, do not adjust the speed change mechanism or travel. Do not touch the transmission parts, moving workpieces, tools, and other working surfaces during processing with your hands. Do not measure any dimensions during operation. It is prohibited to pass or pick up tools and other items across the transmission parts of the machine tool.
- If there is an abnormal noise, stop the machine for inspection immediately. Do not operate it forcibly or when it is malfunctioning. Do not overload the machine tool.
- During the processing of each component, strictly follow the process discipline. Read the drawings carefully, understand the control points, roughness, and technical requirements of relevant parts, and determine the processing procedures for the fabricated parts.
- Stop the machine when adjusting the machine speed, travel, clamping workpieces and tools, and cleaning the machine tool. Do not leave the work post when the machine tool is running. If you need to leave for some reason, stop the machine and cut off the power.
- Stack the raw materials to be processed, finished products, semi – finished products, and waste materials in the designated places. Keep all kinds of tools and cutters complete and in good condition.
- After the operation, cut off the power, remove the tools, place the handles in the neutral position, and lock the switch box.
- Clean the equipment, sweep up the iron filings, and inject lubricating oil into the guideways to prevent rust.
Install the Workpiece: Clamp the workpiece on the lathe according to the processing requirements, and select an appropriate rough – machining or finish – machining tool.
Set Lathe Parameters: Adjust the rotation speed and feed rate of the lathe according to the workpiece material, target size, and processing requirements.
Start the Lathe and Make an Initial Cut: Make a slight feed and make the first cut at the specified length on the right side of the workpiece.
Measure the Workpiece Dimensions: Stop the lathe while keeping the position of the feed mechanism unchanged. Measure the workpiece dimensions and calculate the amount of material to be removed further.
Perform Final Processing and Inspection: Continue turning until the target size is reached, and check the surface quality of the workpiece to ensure there are no defects. Make necessary adjustments if there are deviations to meet the final tolerance requirements.
Different types of tools are used during the turning process. Each tool has different structures, materials, and uses. Common tool types include:
Facing Tool: Mainly used for machining the end face of the workpiece. According to the tool feed direction, it can be divided into left – hand facing tool and right – hand facing tool.
Chamfering Tool: Used for machining chamfers. The material is usually carbide or high – speed steel, and it can be divided into single – angle, variable – angle, and replaceable – insert chamfering tools.
Threading Tool: Divided into internal threading tool and external threading tool, used for machining threads inside holes or on the surface of workpieces respectively.
Forming Tool: Mainly used for high – precision CNC machining, suitable for the manufacture of parts that require high – precision contours.
Taper Turning Tool: Used for machining conical parts such as shafts and nozzles, which can change the diameter of the workpiece.
Grooving Tool: Mainly used for cutting grooves on the surface of the workpiece. It has various shapes, and different tools are selected according to processing requirements.
Turning is suitable for a variety of materials, mainly metals. At the same time, some high – performance plastics can also be used for turning.
Metal materials include:
- Steel
- 1.0038/ St37 – K / S235JR
- 1.0503/C45
- 1.0570/ St52 – 3 / S355J2G3
- Brass
- Aluminum
- EN AW – 2007/ 3.1645/AICuMgPb
- EN AW – 6060/ 3.3206/AI – MgSi
- EN AW – 6061/3.3211/AI – Mg1SiCu
- EN AW – 6082/3.2315/AI – Si1Mg
- EN AW – 5083/3.3547| AI – Mg4,5Mn
- EN AW – 7075 /3.4365/AI – Zn6MgCu
- Nickel Alloy
- Titanium
- Stainless Steel
- 1.4301/X5CrNi18.10(V2A)
- 1.4404/ X2CrNiMo17 – 12 – 2 (V4A)
- 1.4571/X6CrNiMoTi17 – 12 – 2
- 1.7131/16MnCr5
- 1.7225 /42CrMo4
Plastic materials include:
- Polycarbonate
- PEEK
- PEI
- PP
The precision CNC turned parts of Xiamen Goldcattle all need to go through strict quality control and testing to ensure that they meet the highest standards and requirements. They can adapt to extreme conditions such as high temperature and high pressure in harsh environments and maintain excellent performance and reliability. Therefore, our products are widely used in products that require high – reliability components, such as aerospace, medical devices, energy, and automatic control. This includes implants in medical devices and key components in energy equipment. As the terminals of capacitive coolant level switches, the copper turned parts produced by Xiamen Goldcattle can be used normally in high – temperature environments of 125 degrees and low – temperature environments of minus 40 degrees.
