Auto parts processing schemes vary depending on the type of parts, materials and processing requirements. The following are some common examples of auto parts processing schemes and general principles for reference:

Examples of 1. common parts processing schemes

Engine cylinder block and cylinder head machining

Drilling processing: the use of carbide multi-edge drill (such as 3-edge drill), compared to the traditional 2-edge drill can improve the feed rate, significantly improve efficiency.

Thread processing: Use high-speed synchronous internal cooling oil hole tap, suitable for cast iron and aluminum alloy materials, and can stably process threads at high line speeds.

Chamfering: Combine the drilling and chamfering processes through composite tools to reduce tool change time and improve accuracy.

crankshaft machining

Drilling and reaming: Select carbide drill bits and reamers with special coating to take into account wear resistance and toughness and extend tool life.

Oil hole processing: special drill bits are used for straight oil holes and inclined oil holes respectively to ensure the stability and accuracy of deep hole processing.

Thread processing: select the corresponding tap according to the material characteristics, such as straight flute tap for cast iron and extrusion tap for alloy steel to optimize chip removal performance.

Steering knuckle machining

Positioning and clamping: the use of five-axis machine tools with a two-pin positioning, to ensure the accuracy of processing.

Milling and boring: Use PCD tools to machine planes, cavities and holes, and cooperate with coolant sleeves to improve chip removal effect.

Compound processing: through multi-process integrated tool, reduce the number of clamping, improve production efficiency.

New energy vehicle input shaft processing

Double-head turning process: one clamping completes the processing of the outer circle, end face, inner hole and central hole at both ends, avoiding reference conversion error and improving efficiency by 113.

Precision control: by optimizing the heat treatment parameters, control the quality of the blank, to ensure that the inner spline radial circle runout and outer circle precision, to meet product requirements.

General 2. processing scheme design principles

Tool selection

According to the material characteristics (such as cast iron, aluminum alloy, alloy steel) and processing (drilling, milling, boring, thread processing) to select the appropriate tool, such as PCD tool for aluminum alloy finishing, carbide tool for cast iron and steel parts.

The tool with internal cooling function is preferred to improve the chip removal and heat dissipation effect, and improve the processing quality and tool life.

process optimization

The principle of process concentration is adopted to reduce the number of clamping and improve the machining accuracy and efficiency. For example, multiple processes can be completed at one time by a composite tool or a multi-function machine tool.

Reasonable arrangement of the processing sequence, the first processing datum, and then gradually processing other parts, to ensure the accuracy of the transfer between the various processes.

Equipment and fixture

According to the size, shape and processing requirements of the parts, select the appropriate machine tools, such as CNC lathes, machining centers, five-axis machine tools, etc.

Special fixture is designed to ensure accurate positioning of parts, reliable clamping and reduce machining deformation. For thin-walled parts, flexible clamps or support structures are required to avoid deformation due to excessive clamping force.

Quality Control

Set key detection points in the processing process, such as size measurement, surface roughness detection, shape tolerance detection, etc., to find and correct quality problems in time.

The use of automated testing equipment (such as coordinate measuring machines, visual inspection systems) to improve detection efficiency and accuracy.

3. considerations

Material characteristics: the cutting performance of different materials varies greatly, so it is necessary to select appropriate cutting parameters and tools according to the hardness, toughness and thermal conductivity of the material.

Machining accuracy requirements: For high-precision parts (such as engine block, steering knuckle, etc.), it is necessary to strictly control the machining error, adopt high-precision machine tools and tools, and optimize the machining process.

Production efficiency and cost: Under the premise of ensuring quality, reduce processing costs by optimizing tool life, reducing tool change time, and improving equipment utilization.

Environmental protection and safety: the use of environmentally friendly cutting fluid, optimize the chip removal system, reduce cutting fluid leakage and waste accumulation; at the same time, to ensure the normal operation of equipment and tool safety protection devices.

The above scheme is for reference only, and the actual processing needs to be adjusted and optimized according to the design requirements of specific parts, production batch, equipment conditions and other factors.