The precision of CNC small parts is extremely high precision, so it can serve the processing of precision spare parts in various industries. Before CNC machining small parts, it is necessary to clearly understand the content of the CNC process flow, clearly know the parts to be CNC machined, the shape of the CNC machining and the size of the workpiece, and also know the content of the next CNC machining process. What are the steps for cnc small parts?
►. As is well known, the feed CNC machining path of a CNC lathe moves from the tool point (or the fixed origin of the machine tool) until it returns to that position and completes the machining program, including the cutting path, tool cutting, cutting and other non-cutting idle paths.
► The feed lines for CNC precision machining are basically carried out in accordance with the contour sequence of the parts. Therefore, the key to determining the tangent line lies in the feed lines for rough CNC machining and idle travel.
►During the cnc precision machining process, the following principles are generally followed to ensure that the accuracy and surface roughness of CNC small parts can be guaranteed.
►Try to shorten the CNC precision machining route as much as possible, reduce idle travel time, improve CNC machining efficiency, simplify the workload of numerical calculation, and simplify the machining program. For some reusable programs, subroutines should be adopted.
► cnc refers to the programming and control of cnc machine tools using the NC machining language, which is usually G-code. The G coding language for NC machining tells the cnc machine tool which Cartesian position coordinate to use for the machining tool, and controls functions such as the feed rate of the tool, spindle speed, tool change, and coolant.
The four main processes of the precision machining of CNC small parts:
CNC precision machining utilizes computer numerical control mechanical processing, that is, it is a method of controlling the processing and motion processes of mechanical processing by using digital automation information. It can also refer to an automated machine tool equipped with a control system program. The main division of processes is as follows:
1. CNC machining of surface first and then holes:
For components such as shells, brackets and connecting rods, parallel surfaces should be cnc machined first before cnc machining holes are produced. In this way, the production and processing holes can be precisely positioned with parallel surfaces, ensuring the positional precision of the parallel surfaces and holes, and providing convenience for the production and processing of holes on the parallel surfaces.
2. First, cnc process the reference surface:
During the production process of components, the outer surface that serves as the precise positioning reference should be completed by cnc machining first, which provides a more accurate reference for the subsequent production and processing steps. It is called "benchmark first".
3. Surface finish CNC machining:
The surface finish of the main outer surface should be processed by cnc machining (such as grinding and polishing, honing, fine grinding and rolling production processing, etc.) at the end of the processing technology planning. The roughness of the outer surface after processing should be above Ra0.9um. Even slight impacts can damage the outer surface. Generally, protective measures should be taken with velvet cloth. It is strictly prohibited to directly touch the product workpiece with hands or other items to prevent the outer surface of the finishing production from being damaged during transportation and assembly between steps.
4. Distinguish the production CNC processing links:
For the outer surfaces of precision cnc small parts with high quality standards, the production and processing stages should be distinguished, which are usually divided into rough machining, semi-precision milling and precision milling. It is mainly to ensure the quality of the products produced and processed; It is beneficial to the rational use of machinery and equipment; Facilitate the reasonable arrangement of heat treatment process steps; It is also convenient to detect defects in the embryo as soon as possible.
The process flow of precision mechanical processing of CNC small parts
The technological process of CNC precision mechanical processing of small parts usually includes the following steps:
(1) Part drawing analysis: Based on the part drawing, analyze the geometric shape, dimensional accuracy and surface quality requirements of the part, and determine the processing technology route.
(2) Develop processing programs: Based on the part drawings and processing technology routes, use CAD/CAM software to develop processing programs and generate G codes or M codes.
(3) Program input and debugging: Input the pre-written processing program into the controller of the CNC machine tool for program debugging to ensure that the program can be executed correctly.
(4) Clamping the workpiece: Clamp the workpiece to be processed onto the machine tool's worktable to ensure that its position and posture meet the processing requirements.
(5) Tool setting and origin setting: Determine the relative position between the tool and the workpiece through manual or automatic tool setting, and set the processing origin.
(6) Start processing: Start the CNC machine tool and, in accordance with the instructions of the processing program, automatically complete the processing of the parts.
(7) Processing process monitoring: During the processing, the processing status and tool status are monitored in real time through the monitoring system and tool wear detection device equipped on the machine tool to ensure processing quality.
(8) Workpiece inspection and processing: After processing is completed, dimensional inspection and surface quality check are carried out on CNC small parts, and non-conforming products are dealt with to ensure product quality.
As an experienced manufacturer in the field of CNC fabrication, we provide CNC Small parts to a full range of industries, such as CNC rc car parts, CNC robot parts, CNC electronic parts, cnc medical parts etc. Our modern technology and precision CNC machines enable us to produce complex and customized CNC small parts for a wide range of industries and applications. We place great emphasis on precision and efficiency to ensure that each CNC part meets our high quality standards. We work closely with our customers to develop custom machining solutions tailored to their specific needs. We have high-quality and reliable material suppliers, the mechanical properties of materials are up to military standards, and the use of advanced testing equipment to strictly control the size and tolerance, at any time to provide you with high-quality non-standard CNC small parts in every field.
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