5 Points to Know about When Choosing A CNC Machining Company

What is Their CNC Precision Parts Machining Process?

As we all know, no matter whether it is from all walks of life or any job, there is a set of standardized workflows in order to complete tasks with high efficiency and high quality. Of course, CNC machining is no exception. So first we will walk into the CNC precision parts machining process and see how each precision part is made from scratch.

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1. Customer Provides Drawings

The so-called processing must have a basis: drawings or samples. Without these two, processing will be impossible. A complete set of drawings is essential for CNC machining, which can improve the quality of the finished custom CNC parts’ rationality and efficiency, quality, etc.

2. Develop Processing Plan According to Drawings

After getting the drawings, the engineer will conduct a detailed analysis and understanding of the mechanism, size, process, etc. of the precision CNC machining parts to be processed, and determine what equipment needs to be used for processing.

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3. Determine the Final Processing Plan

Improve the initially formulated processing plan, select the best processing plan in the differentiation, improve efficiency and production cost, and achieve a win-win situation.

4. Make Work Instructions

According to the final selected processing plan, the processing engineering drawings are produced, the pictures are created according to the process, and the parameters such as dimensions and tolerances are inspected, so as to meet the needs of customers and provide convenience for the production staff.

cnc machined components manufactured by YIJIN Hardware

The above is a relatively simple CNC machining process for your reference. Although it is just four points, it takes a lot of time and energy in actual operation, especially for some novice engineers or manufacturers who do not have much experience, the communication process will be more difficult.

What Determines the Price of CNC Machining?

It is beyond reproach that the advantages of CNC machining methods for some complex parts and special-shaped parts are unmatched by ordinary lathe processing. Under such powerful advantages, CNC machining methods continue to be favored by various entrepreneurs, so let’s talk about it next. There are factors that determine the price of CNC machining.

First of all, the factors that affect the price of CNC machining mainly include materials, tolerances, quantities, etc., so in order to let everyone see each item more intuitively, we will explain point by point.

1. Materials

As we all know, different raw materials are always an important factor in determining the price trend. Of course, the quality of the material is also an important factor in determining the quality of the CNC precision machining parts.

2. Tolerance

Fine tolerances can reduce the scrap rate of precision components machining, of course, this also means a higher price.

3. Quantity

We all know that the cnc turned component needs to be programmed before processing. Whether it is processing 1 piece or 1000 pieces, the programming time is the same, so batch processing can reduce the programming cost, thereby reducing the overall price.

4. Processing Time

This is easy to understand, the longer a CNC part takes to process, the higher the cost of processing will naturally be.

5. Delivery Time

In addition to normal orders, we can also see that there are usually some urgent orders that need to be processed. For these urgent orders, more employees need to be coordinated for processing and subsequent delivery. Other orders are naturally one of the costs, or we can simply understand them as expedited fees.

OK, then we have analyzed the above points for the factors that affect CNC machining. Of course, in actual machining, we also need to calculate the cost according to the actual situation.

How to Choose Raw Materials for CNC Precision Parts Machining?

When it comes to CNC precision parts processing, we have to mention aluminum alloy machining. Aluminum alloy processing accounts for a very large proportion of CNC manufacturing. In such a proportion, CNC machined components manufacturers must be fiercely competitive. To gain an advantage in the competition, let’s talk about it.

First of all, the quality determines the advantage to a large extent. It can be processed through some difficult materials. The engineers of these CNC manufacturing manufacturers are very experienced in the tool, machine tools, and other industries.

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For example, a major feature of aluminum alloys is work hardening. During processing, the chamfered angle is large and the contact area formed is small. In addition, the high cutting force in the machining process, combined with the frictional force of the chip flow, these factors will cause the local cutting heat of the tool to be too high.

Then these factors are one of the major reasons that lead to the failure of their precision CNC machining parts.

Therefore, in order to ensure the quality of precision parts and small rebounds, etc., it is necessary to avoid excessive cutting force. Thin-walled parts often have a tendency to deform under tool pressure, as well as causing chatter, friction, and even tolerance issues.

Why CNC Machining Sequence is Important to Product?

The CNC metal parts processed by CNC are generally parts with complex structure and high precision, so setting a reasonable processing sequence helps to improve and guarantee the machining accuracy and product quality.

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The following YIJIN Hardware engineers will share with you the importance and key points of setting up the CNC machining sequence reasonably, hoping to help you in your daily machining operations.

  1. Before processing, the surface of the workpiece must be adjusted to the fine benchmark, which is conducive to the accuracy of the workpiece after processing.
  2. After completing the finishing datum machining, it is necessary to perform rough machining → semi-finishing → finishing machining on each surface of the workpiece at one time. Mirror processing is also required for surfaces that require mirror processing.
  3. When processing a workpiece with a responsible shape and a larger size, it is necessary to arrange the scribing process first, so that it is convenient to find the benchmark correctly.
  4. When machining easily damaged materials or workpieces. Mirror finishing and finishing can be processed first in the front. Other surfaces can be machined later.

The division rules of the CNC machining sequence should be flexibly controlled according to the quality requirements, structural characteristics, and raw material characteristics of the CNC precision machining parts, and should not be static. Reasonable and orderly division of machining sequence is beneficial to improving CNC machining efficiency and CNC precision parts quality.

How to Correctly Choose CNC machining Companies for Cooperation?

Parts processing or metal rapid prototyping cannot blindly choose cheap materials and CNC machining companies without quality assurance. As a research and development company or a CNC manufacturing company, you must understand and follow the following methods for your precision machining parts.

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  1. Select the processing raw materials according to the needs of your own precision machining components. If you don’t know the material, choose a machining manufacturer with more than 10 years of experience, they will advise you on what kind of material to use, and the processing plan)
  2. It is necessary to choose a CNC machining company that is willing to sign a contract and a confidentiality agreement before cooperation. Avoid leaking your own CNC products in advance and causing unnecessary trouble.
  3. For manufacturers with high processing efficiency, some custom machined parts development processes need to go through trial and error iterations. In this process, machining manufacturers are required to ensure the processing time. Generally, powerful machining manufacturers can ship within 2 days.
  4. Choose a manufacturer with guaranteed after-sales. Generally, the machining manufacturers who dare to promise after-sales are CNC machining companies with deep experience in the industry.

The above are the main points of how manufacturing companies and R&D companies should find machining manufacturers to cooperate. Hope it will be of some help to you all.

Conclusion

If you need CNC machined parts for your business or project, there are a number of companies that offer CNC machining services. These companies will take your design and create the parts you need using CNC machines.

Before choosing a company, it’s important to consider factors such as cost, turnaround time, and the materials they are able to work with. You should also request quotes from multiple companies to ensure you are getting the best price.

Expand Knowledge

What is CNC Machining?

CNC machining is a manufacturing process that uses computer-controlled tools to remove material from a workpiece. The process can be used to create parts with complex shapes and intricate details.

CNC machining is a versatile manufacturing process that can be used to create parts for a wide range of industries and applications. In this guide, we will introduce you to the basics of CNC machining, including its history, how it works, and some of its most common applications.

What is the History of CNC Machining?

CNC machining is a descendant of the earlier subtractive manufacturing process known as NC (numerical control) machining. NC machining was developed in the 1940s and 1950s as a way to automate the production of parts for use in the aerospace industry.
The first NC machines were large and expensive, and could only be found in specialized factories. But as the technology progressed, it became more compact and affordable. This led to the development of the first CNC machines in the 1960s.

How Does CNC Machining Work?

CNC machining is a subtractive manufacturing process, which means it starts with a solid block of material (known as the workpiece) and removes material from it to create the desired part or component.

The process is controlled by a computer program, which tells the CNC machine what movements to make and how much material to remove. The program is written using a CNC programming language, which is then converted into code that the machine can understand.

The code is fed into the CNC machine, which reads it and proceeds to mill, drill, or otherwise remove material from the workpiece according to the instructions. When the machining is complete, the part is ready for use.

Common Applications of CNC Machining

CNC machining is used in a wide range of industries and applications. Some of the most common uses for CNC machined parts include:

Aerospace: CNC machining is often used to create parts for aircraft and spacecraft, such as engine components, landing gear, and control surfaces.

Automotive: Many car parts are now manufactured using CNC machining, including engine blocks, transmissions, and suspension components.

Medical: CNC machined parts are used in a variety of medical devices and equipment, such as implants, prosthetics, and surgical instruments.

Consumer goods: A wide variety of consumer products are manufactured using CNC machinings, such as phones, computers, and appliances.

Advantages of CNC Machining

CNC machining has a number of advantages over other manufacturing processes, such as:

Precision: CNC machining can create parts with very high levels of precision. In some cases, the tolerance can be as low as 0.001 inches (0.025mm).

Repeatability: CNC machined parts can be identical to each other, making mass production easier.

Versatility: CNC machining can be used to create parts with a wide range of shapes and sizes.

Speed: CNC machining is a fast manufacturing process, which means parts can be produced quickly.

Disadvantages of CNC Machining

There are also some disadvantages to using CNC machining, such as:

Cost: CNC machining can be expensive, particularly for small batch sizes.
Setup time: It can take a significant amount of time to set up a CNC machine for production.

Limited materials: CNC machining is typically only used for metals and plastics.
Operator training: CNC machining requires operators to have specialized training.

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