Each precision custom CNC machined part always has to go through several processes before completion: sketches, drawings, materials, creation of CNC machining programs, prototype production, quality assurance testing, and mass production. The basic CNC machining process of this series will affect the cost and quality of making custom CNC machining parts.
Below we will reveal the story behind the custom CNC machining parts for you:
Drawing of custom CNC machining parts drawings
As a professional CNC lathe processing staff, understanding the drawing dimensions and professional symbols of precision custom CNC machining parts is the basis, but if you are initially exposed to the CNC machining industry, or you need to develop a project, then the dazzling drawings may let you It’s difficult. If you don’t understand the drawings, it’s difficult to guarantee efficiency and effectiveness. Then you can use outsourcing to achieve it. Commonly used formats for drawing drawings of custom CNC machining parts include CAD file (dwg, dxf, pdf, etc.), 3D File (step, stp, etc) drawings.
Custom CNC machining parts preparation
Before starting a new project, we need to be fully prepared, from the preparation of raw materials to the guarantee of quality inspection. The key to making custom CNC machining parts lies in the selection of raw materials, the production of CNC programs, the selection of tools, and the application of fixtures. With these preliminary preparations, it will be possible to ensure that the next work can proceed smoothly.
CNC machining program
The creation of programs in custom CNC machining is one of the most critical steps, and CNC programs are related to most of the machine-driven manufacturing. There are two main manufacturing factors that need to be considered in the program generated by custom CNC machining parts: machining parameters and machining sequence.
Perfect parameters are often related to the quality of custom CNC machining parts. Parameter setting is an important factor that needs to be focused on, because it can prevent bad conditions such as poor surface finish, tool pull-out, tool breakage, and unplanned spindle stop. Therefore, a CNC machining program must be prepared to manufacture custom CNC machining parts with the least number of operations. As complexity increases, so does the number of operations. The correct sequence of the machining process in the program will help to manufacture the part from a machining perspective.
Cutting tool
Tools affect the efficiency of the entire custom CNC machining part process because they are the main players in material subtraction. These tools are used to precisely remove material from custom CNC machined parts to form custom machined parts. Various cutting tools need to have a high level of strength, hardness, toughness and wear resistance to withstand the extreme conditions during the cutting operation.
There are many types of tools suitable for each process and each material. The key points for preparing suitable tools for custom CNC machining parts are:
A. Prepare tools suitable for custom CNC machining parts process.
B. Choosing a strong, suitable and correct tool holder for the process of custom CNC machining parts.
C. Select the tool grade suitable for the material to be cut (tool material, coating, blade grade, etc.)
D. Pay attention to the geometric form suitable for the specific application. (For example, depth of cut, rake angle, number of grooves or teeth, bandwidth, helix angle, etc.)
E. Make sure to match the correct tool gauge length to the CNC program.
Choice of fixture
In the process of customizing CNC machining parts, it is necessary to select suitable fixtures, which can help fix the processed materials. Some common fixtures seen in custom CNC machining parts workshops are CNC jaws, spindles, centers, driving jaws, horizontal plates, sinusoidal plates, milling fixtures, drilling fixtures, and so on. This is also a necessary step for optimizing custom CNC machining parts.
custom CNC machining operations
Customizing the appearance of CNC machined parts, choosing the right processing technology is one of the processes of customizing CNC machined parts. For example, milling, turning, surface treatment, etc.
Each custom CNC machined part has its unique part characteristics. From the most basic point of view, the main operations are completed by milling and turning. The difference between the two lies in the processing method of the custom CNC machined part, for example: whether the tool is fixed or custom Whether the CNC machining parts are rotating, etc.
There are hundreds of common custom CNC machining processes, the most common are the following:
1. Outer diameter turning-This is a process completed in a turning operation (lathe), which can remove the material on the surface of the custom CNC machined part to obtain the required external features.
2. Copy milling-as the name suggests, this is a process of creating a copy on a custom CNC machined part using an end mill.
3. Cavity/groove milling-This will use an end mill to create a groove or cavity area on a custom CNC machined part.
4. Thread Machining-This process creates threaded holes in custom CNC machined parts by taps or thread milling cutters.
5. Grooving-This is done in a turning operation (lathe), where grooves are formed on the surface of the custom CNC machined part. Can be grooved on the inner diameter, outer diameter and end face.
6. Drilling-This is the use of twist drills to create dimensional controlled holes.
7. Boring-This is a process done in a turning operation (lathe), using a single point cutting tool to enlarge an existing hole.
8. Reaming-This is done on the existing hole to achieve a strictly controlled size up to +-.0001 inches.
9. Finishing-This process is defined as subtracting material to cut a flat surface. The end face can be completed in turning and milling.
10. Grinding-This process involves using abrasives to subtract material from custom CNC machined parts at a very accurate speed.
Surface treatment
Each customer has different requirements for surface treatment. We will customize the application scenarios, materials and consumer groups of CNC machining parts to choose the appropriate surface treatment according to customer needs. Surface treatment is an important part of beautifying the appearance of custom CNC machined parts. It can not only cover the appearance of parts, but also improve the corrosion resistance and wear resistance of custom CNC machined parts. Common appearance and surface treatments of custom CNC machined parts include: anodizing, electroplating, sandblasting, PVD, silver plating, and so on. CNCMF has more than 15 kinds of surface treatments for you to choose from.
Quality Inspection
This is an important step to check the quality of custom CNC machining parts. Common testing instruments include: height detector, two-dimensional testing, CMM (three-dimensional testing) and so on. Since the production accuracy of machined parts, precision is an important part of custom CNC machined parts, so the commonly used inspection indicators in custom CNC machined parts are usually dimensional accuracy, surface finish and structural integrity.
Surface finish and structural integrity
For precision inspection, check the structural integrity through non-destructive testing methods to check whether there are cracks or voids in the custom CNC machined parts during processing. Then check the final properties of the custom CNC machined parts, including surface finish and structural integrity. The surface finish is usually checked by a profiler.
Dimensional accuracy
Check the size of the custom CNC machined parts immediately after the custom CNC machining is completed. The dimensional accuracy is very important. The gauge used to measure the custom CNC machined parts is the attribute gauge (pass or fail gauge). Before sending the custom CNC machining parts to the customer, the variable gauge (caliper, micrometer, height gauge) is usually used in the operation process, and the coordinate measuring machine (CMM) is used for final and thorough quality inspection.
Package
It is inevitable that there will be collisions during transportation, in order to reduce unnecessary losses caused by custom CNC machining parts during transportation. We will conduct a full inspection before packaging, and then package according to customer requirements to reduce the risk of custom CNC machining parts. Four layers of protection: 1. Wrapping paper 2. Pearl cotton 3. Foam 4. Paper/wooden boxes are used in the packaging process to ensure that we provide you with the best quality and most beautiful custom CNC machining parts.
Shipment
Before shipment, confirm with the customer and choose the shipping method according to the customer’s requirements. We will also recommend the customer to choose the appropriate shipping method according to the situation. Transportation: We use express courier suchas UPS, DHL, EMS, TNT, FEDEX UPS，DHL，EMS，TNT，FEDEX for sample shipping. We canarrange air or ocean shipping for bulk delivery as your requirement.