Category Archive CNC Machining parts


The difference of machining center, engraving and milling machine and engraving machine

Carving and milling machine, carving machine and machining center (computer gong) are very similar in appearance and structure. The following is a comparative analysis of the three


Machining center: Hong Kong, Taiwan and Guangdong are called computer gongs. They are highly automatic multi-functional CNC machine tools with tool magazine and automatic tool changing device. The first machining center appeared in the United States in 1958. It can realize the centralized processing of milling, drilling, boring, reaming, tapping and other processes after the workpiece is clamped once, with special emphasis on “milling”.

Engraving machine: its spindle speed is high, suitable for small tool processing, torque is relatively small, focusing on the “engraving” function, such as wood (special processing of wood called wood engraving machine), two-color board, acrylic board and other low hardness plate, not suitable for strong cutting of large workpieces. At present, most of the products on the market under the banner of engraving machine are mainly for processing handicrafts with low cost. Due to the low precision, they are not suitable for mold development; but there are exceptions, such as wafer engraving machine.

Carving and milling machine: as the name suggests. It can be carved or milled. On the basis of engraving machine, the power of main shaft and servo motor is increased, and the bearing force of bed is increased. At the same time, the high speed of main shaft is maintained, and more importantly, the precision is very high. Engraving and milling machine is also developing at a high speed, commonly known as high-speed machine. It has stronger cutting ability and very high machining accuracy. It can also directly process materials with hardness above HRC60 for one-time forming.

In terms of appearance and volume

The volume of machining center is the largest, the volume of large 1690 machine is 4m * 3M, and that of small 850 machine is 2.5m * 2.5m; carving and milling machine is the second, and that of large 750 machine is 2.2m * 2m; carving machine is the smallest.

In terms of mechanical structure

Machining centers generally use cantilever type, carving and milling machines and carving machines generally use gantry type structure, gantry type is divided into pillar type and fixed beam type, at present, carving and milling machines are mostly fixed beam type.

In terms of index data

Spindle maximum speed (R / min): 8000 machining center; carving and milling machine is the most common 240000, high-speed machine is the lowest 30000; engraving machine is generally the same as carving and milling machine, engraving machine for high gloss processing can reach 80000, but it is not ordinary motorized spindle, but air floating spindle.

Spindle power: machining center is the largest, from thousands of watts to tens of kilowatts; carving and milling machine is the second, generally within ten kilowatts; carving machine is the smallest.

Cutting capacity: machining center is the largest, especially suitable for heavy cutting, roughing; carving and milling machine is the second, suitable for finishing; carving machine is the smallest.

Speed: because the engraving and milling machine and engraving machine are relatively light, their moving speed and feed speed are faster than the machining center, especially the high-speed machine equipped with linear motor, the maximum moving speed can reach 120m / min

Accuracy: the accuracy of the three is almost the same.

From the processing dimension: the area of the worktable can better reflect this. The smallest worktable area (unit mm, the same below) of domestic machining center (computer gong) is 830 * 500 (850 machines); the largest worktable area of engraving and milling machine is 700 * 620 (750 machines), and the smallest is 450 * 450 (400 machines); engraving machine generally does not exceed 450 * 450, the common is 45 * 270 (250 machines).

In terms of application objects: machining center is used to complete the processing equipment of large amount of milling work pieces, large molds and materials with relatively high hardness, which is also suitable for roughening of ordinary molds; engraving and milling machine is used to complete the finishing of small amount of milling work pieces and small molds, which is suitable for copper and graphite processing; low-end engraving machine is inclined to wood, two-color board, acrylic board and other materials with low hardness Plate processing, high-end suitable for wafer, metal shell polishing.

people say that

Machining center, engraving and milling machine can do both products and molds, engraving machine can only do products.

Tool magazine: Machining Center, there is a tool magazine is the machining center, no tool magazine is called computer gong or CNC milling; carving and milling machine generally does not equipped with tool magazine, even if the optional tool magazine is 12 knife umbrella tool magazine, or 6 knife in-line tool magazine; carving without tool magazine.


There is no CNC engraving and milling machine in foreign countries. Strictly speaking, engraving is a part of milling, so there is only the concept of machining center in foreign countries, and the concept of small machining center is derived to replace engraving and milling machine. Purchase engraving machine or purchase CNC milling machining center is often to ask their own questions, to see the actual production needs. In addition, there is the popular high-speed cutting machine (hscmachine), which is called high-speed machine in China.

2、 Analysis from the angle of numerical control

  1. — the CNC milling center requires a general speed for the CNC system, and the spindle speed is about 0 ~ 8000rpm
  2. — the engraving and milling machine requires a high-speed numerical control system, and the spindle speed is about 3000 ~ 30000 rpm
  3. High speed cutting machine tools require high-speed CNC system and excellent servo motor characteristics. The spindle speed is about 1500 ~ 30000 rpm

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Introduction of mold production process

The following modern mold production process to do a simple introduction.

1)ESI(Earlier Supplier Involvement Early participation of suppliers): this stage is mainly about the technical discussion on product design and mold development between customers and suppliers. The main purpose is to let suppliers clearly understand the design intention and precision requirements of product designers, and at the same time let product designers better understand the mold production capacity and product process performance, so as to make more reasonable decisions The design of the theory.

2) Quotation: including the price of the mould, the service life of the mould, the turnover process, the required tonnage of the machine and the delivery date of the mould. (more detailed quotation should include product size and weight, mold size and weight, etc.

3) Purchase order: customer order, deposit issue and supplier order acceptance.

4) Mold production planning and schedule arrangement: at this stage, we need to reply to the customer according to the specific delivery date of the mold.

5) Mold design: the possible design software includes Pro / Engineer, UG, Solidworks, AutoCAD, CATIA, etc

6) Purchasing materials

7) Mold processing: the processes involved include turning, milling, heat treatment, grinding, CNC, EDM, WEDM, jig grinding, laser engraving, polishing, etc.

8) Mold assembly

9) Trial run

10) Sample evaluation report (SER)

11) Ser approval


Causes of computer gong limit alarm

Cause analysis of positive and negative hard limit alarm of computer gong

Computer gong processing in normal circumstances will not appear this alarm, but what is the reason for this situation?

  1. The contact of travel switch is pressed and stuck (over travel);
  2. The travel switch is damaged;
  3. There is open circuit, short circuit and no signal source in the travel switch circuit;
  4. The limit stop cannot press the switch contact to the action position;
  5. The PLC input point is burnt out.

Many times, due to the improper use of the operation and technical personnel, or the work handover is not in place, there will be some failures in the processing of computer gongs. How can we prevent the deformation of parts in the processing of computer gongs?

In order to meet the requirements of ultra-high speed machining, the computer gong machining will adopt the structure of spindle motor and machine tool spindle, which realizes the integration of variable frequency motor and machine tool spindle. The bearing of spindle motor adopts magnetic floating bearing, hydrodynamic bearing or ceramic rolling bearing. Deformation often occurs in the process of processing, how to prevent it?

1、 In order to reduce the influence of cutting force and cutting heat, the deformation caused by rough machining can be corrected in finish machining.

2、 In order to reduce the influence of clamping force, the following measures are taken to reduce the influence of clamping force

  1. When radial clamping is used, the clamping force should not be concentrated on a radial section of the workpiece, but should be distributed over a larger area to reduce the clamping force per unit area of the workpiece.
  2. The position of clamping force should be selected in the part with strong rigidity to improve the deformation of thin-walled parts under the action of clamping force.
  3. Change the direction of clamping force, change the radial clamping to axial clamping.
  4. In order to reduce the clamping deformation, the computer gong processes the process boss or thread to strengthen the rigidity of the workpiece. When processing, the special structure claw is used to clamp, and the convex edge is cut off at the end of processing.

What is RC Car?

RC car (RC = remote control) is a miniaturized version of all kinds of real racing cars. It has the same mechanical principle as the real car, similar structure and handling characteristics, and the amazing speed that makes super sports cars feel inferior! Take one eighth of the level road remote-controlled cars, for example, which can accelerate from standstill to 100km / h in 1.6 seconds and reach a top speed of 160km / h. This performance is equal to that of the world’s most technologically advanced formula one racing cars, and makes all super sports cars blush. The reason why remote control model is considered as “hobby” rather than “toys” is that the remote control model requires players to have certain knowledge and technology, which is fundamentally different from toys that can be bought and played. Players can not only have fun in the operation of the model, but also constantly learn new knowledge in the model, exercise thinking ability and practical ability. Therefore, remote control model is definitely a hobby beneficial to the body and mind. Although driving a remote control model car can not control the steering wheel in the car, it can only control the car through the wireless remote control, but in fact, the pleasure obtained through the eyes is no less than that In the real car, because you can enjoy the lightning speed and strong ability to cross the corner. If speed is not your pursuit, you can choose a remote control vehicle with high fidelity or various interesting functions, such as watching several unreal container trucks walking, driving a jumbo to conquer rugged roads, and driving an AE86 drift remote control model car to deliver bean curd by Tuohai, who plays the first character D, is also a fun remote control enjoyment.

What is RC Car

Remote control model vehicles can be divided into two categories according to the power source. The first category is “EPRC car” driven by battery / electric motor, and the second is “GP RC car” with internal combustion engine as power output. According to the proportion, there are 1 / 28, 1 / 18, 1 / 10, 1 / 8 and 1 / 5. For example, 1 / 10 is about one tenth of the size of the real car. At present, there are 1 / 10 electric saloon cars, 1 / 10 oil powered saloon cars, 1 / 8 large foot trucks and 1 / 8 oil powered off-road vehicles. In the future, we will make an in-depth introduction to each type of vehicles. You can choose your favorite remote control model car according to the characteristics of each vehicle type, so that we can realize the model dream together.

The product of high technology

Remote control model car can be said to be a product of high technology, widely used in many advanced materials and technologies, such as carbon fiber, titanium alloy, aviation aluminum, in the remote control vehicle are very common parts materials. Moreover, the latest electrical / electronic technology and digital technology have been applied to remote control vehicles for the first time.

Drive for RC Car

CHENGCHUANG are China machining parts workshop for Radio Control R/C Planes, RC Airplanes, RC Helis and Helicopters, RC Cars, RC Trucks, RC Truggys, RC Boats, RC Radios, RC Engines, parts, hop-ups, and accessories, We can produce machined parts according to your requirements. high quality, low price, low cost OEM CNC Machining service.


RC remote control vehicle frame

RC is the abbreviation of radio control. It is not a very popular sport either at home or abroad. Why do you say that? RC is really a sport that requires a lot of time and money. Therefore, those who have money foundation do not necessarily have the time, and those who have time do not necessarily have the money to play RC remote control model car entry – Adult remote control toys.

A complete set of RC includes the following parts (this article only takes the remote control vehicle as an example) firstly, the frame, the remote control system, the power and steering system, and finally some auxiliary materials such as tools and oil products.

The foundation of RC is the frame. Different types of RC models will have different types of frames. The figure above shows a flat road sports car, referred to as level running. Other categories include off-road vehicles, short-distance trucks, big foot trucks, climbing cars, F1, drift cars, etc. due to the different transmission structures, they can also be divided into belt drive and shaft drive. The above figure shows belt driven motor car. The frame can also be divided according to the proportion: 1:16 1:14 1:12 1:10 1:8, 1:5 and so on. Generally speaking, those below 1:20 are collectively referred to as mosquito vehicles, and the most popular ones are 1:10 and 1:8.

In fact, the biggest difference between RC and other remote-control toy cars is the frame. The RC frame can be adjusted from the height of the car to the inclination of the tire, the tightness of the transmission device, and the height of the shock absorbers. This is to adapt to different remote control methods and the needs of different venues. This is also one of the fun of RC. Even if the same frame is in the hands of different people, there will be different settings and different motion characteristics because of the manipulation.

Our factory specializes in RC frame by CNC machining, welcome to contact us for customized.


RC Driver Cup/Shaft

Our factory specializes in RC Driver Cup/Shaft by CNC machining.

Drive shaft description

Working conditions

The driving shaft is subjected to, torsion, shear, tension, compression, impact and other alternating stresses, which can also cause the torsional and bending vibration of the drive shaft and generate additional stress; the stress distribution is uneven; there is sliding friction between the drive shaft journal and the bearing.

performance requirement

The main failure modes of drive shaft are fatigue fracture and serious wear of journal. Therefore, the material should have high strength, certain impact toughness, enough bending and torsion fatigue strength and stiffness, and the journal surface should have high hardness and wear resistance.

Drive shaft material

Forged steel drive shaft: high quality medium carbon steel and medium carbon alloy steel, such as 40, 45, 35Mn2, 40Cr, 45Cr, 35CrMo steel, etc;

Material selection

This kind of material is medium carbon alloy steel, which can be improved by quenching and tempering (or normalizing) heat treatment. In recent years, a new kind of steel, namely alloy quenched and tempered steel, has been widely used in high-power engines. The grain size is refined by adding alloy elements such as Si, Cu and Ti, strengthening the steel matrix and improving the strength of the steel.


CNC Machining Shop

CNC Machining Shop

CNC Machining Shop. CNC Machining Shop is a China CNC precision machining manufacturer and Chinese CNC machining company with state-of-the-art CNC manufacturing factory based in China. We provide custom 3-5 axis CNC Machining Services, CNC milling services, CNC turning services and manufacture CNC Machined Parts in our China precision CNC machining factory.


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