CNC Machining Principle and Application in Prototype

With the rapid development of scientific and technological innovation today, the speed of product update is so fast. Therefore, the most important thing in the research and development stage is to see the effect of product design through rapid production. The application of CNC processing to the prototype industry will contribute to the improvement of technological innovation. If you want to more, let’s continue to read the topic together.

From machine tools to CNC machines, machines are no longer mindless

When it comes to industry, the most basic thing is manufacturing, and manufacturing is taking all kinds of things from raw materials to parts and then assembling them into products. In the traditional field of metal processing, the manufacture of parts is forging and welding, as well as the turning, milling and grinding. Any metal with shape that we see in our life has been tempered by iron and fire in the factory for many times before we see it.

The steel produced by the steel mill is not a variety of strange shapes we see in life, but the plate, pipe, ingots and other regular shape materials. These materials to be processed into various shapes of the parts need to use a machine tool for cutting. There are some higher precision requirements and surface roughness requirements of the finer parts, and will be used in the machine tool cutting out or grinding out of the elaborate process.

In order to achieve different cutting speeds, traditional machine tools have designed extremely complex transmission systems. Such complex machines are rarely seen in today’s designs.

With the development of servo motor and its application in numerical control machine tool, direct control of motor speed becomes convenient and quick with high efficiency. Servo motor is basically a CVT, the structure of transmission system greatly simplified. Even there are many link motor directly connected to the actuator, and omit the transmission system.

The simplification of the structure is not enough, to achieve a variety of shapes of parts processing, but also need to make the machine tool can be efficient and accurate control of multiple motors to complete the entire processing process.

This will allow the machine to become smart CNC machine tools. And this brain is the numerical control system.

Too “free” in shape? It’s done by interpolation

If the motion trajectory can be expressed in an analytical expression, the entire motion can be decomposed into a composite motion of several coordinate independent motions, and the motor can be directly controlled to generate.

But the shape of a lot of parts in the manufacturing process can be said to be very “Free”, neither round, or square, don’t even know what’s the shape is. Such as cars, ships, aircraft, mold, art, and other products can’t often curve surface is described by using analytic expression, this kind of curve surface is called the Free curve or Free curved surface.

The machine tool can well complete the relative motion of linear segment, arc or other analytic spline curve between the workpiece and the tool, but how to complete this complex “free” movement? The answer is interpolation.

The so-called interpolation is the process of determining the movement path of the cutting tool on the CNC machine tool according to a certain method. According to the given velocity and trajectory, add some new intermediate points between the known points of the trajectory, and control the workpiece platform and tool to pass through these intermediate points, so that the whole motion can be completed.

The posture of the knife is wrong, can’t it be processed?

5-axis CNC can complete!

The processing of complex surface is not only theoretically possible, but also needs to consider the relative position relationship between the cutter and the processed surface.

On the one hand, if the attitude of the tool is not appropriate, it will lead to low surface quality. On the other hand, the tool will also interfere with the structure of the processed parts, do not adjust the relative attitude of the tool is no way to process. This needs to give CNC machine more freedom of movement, make it more dexterous.

Because we are in 3D space relative motion consists of six degrees of freedom (three translational degrees of freedom as well as three rotational degrees of freedom), five coordinate linkage is to make the CNC machine in a space x, y, z three directions of the translational degrees of freedom, and increased the rotational degree of freedom in two directions, and that between cutter and workpiece can present any relative position and relative attitude.

CNC used in the prototype industry

What is prototype model? Generally speaking, after the design of an industrial product is completed, it is not immediately put into production. Instead, a small number of models should be made according to the drawings, so as to see the samples of the finished product in advance. If you are not satisfied with the design, the drawings will be modified, and the batch manufacturing will be started after the final agreement is reached. And this little model, this little model, is the hand board model.

CNC prototype processing has the following advantages:

There is no need for complicated tooling. If you want to change the shape and size of the part, you only need to modify the parts processing procedure, which is suitable for the development and modification of new products.

(2) WayKen processing quality stability, high processing accuracy, high repetition accuracy, to meet the requirements of high-precision products.

(3) Batch production of the production efficiency is higher, can reduce the production preparation, machine tool adjustment and process inspection time.

(4) Can process conventional methods difficult to process complex surface, even some processing parts can not be observed.

WayKen rapid prototyping is a precision prototype model and CNC batch production company. After decades of steady development, has become a business throughout the world more than 30 countries and regions. Quality assurance, reasonable price, timely delivery, service first principle. Our company customers throughout the United States, Britain, France and other parts of the world, the quality of products by customers.

Today, the continuous extension of wake technical force, improve the enterprise overall quality, and implement standardized management, with advanced production equipment, strong technical force, rich experience and the most reasonable price, wake in business and technology in recent years has made a great extend, in metal parts, plastic parts, small batch rapid mould made very good result, Very honor to provide optimal service to our customers. Sincerely welcome friends from all walks of life to inquire.