Can anyone tell me about that technical term symbol in CNC

G0 fast positioning, the tool holder moves at a fast degree, the speed is set in the parameters, and the fast magnification on the panel can also be adjusted; G1 linear feed, car plane, outer circle, and slope all use G1; G2 and G3 are forward and reverse circular feeds, which may be defined in different systems.

g4 delayed execution, its parameter d specifies the number of seconds of delay, but some system parameters are not necessarily represented by d; G50 sets the workpiece coordinate system; G92 thread cutting cycle; (G98 per minute feed G99 per revolution) is mainly used for lathes with private motors.

M3 spindle forward rotation; M4 spindle reversal; M5 stop spindle; M0 mechanical quasi-stop, only stop the signal of the tool holder; m8 on coolant; m9 Turn off the coolant; m98 calls subroutines; m99 subroutine ends; The M2 program ends, the program goes back to the beginning, but does not turn off the spindle, etc.

The M30 program ends, and the spindle, coolant, etc. are turned off, and the program returns to the beginning.

Chinese machine tool model compilation method: Chinese machine tool model adopts the combination of Chinese pinyin letters and Arabic numerals. Description of the model of the machine.

1) The category code of the machine tool uses uppercase Chinese pinyin letters to represent the category of the machine tool. For example, with"c"Representation"Lathes", read"car"。Some machine tools (such as grinding machines) are composed of several classifications, and the classification code is indicated by Arabic numerals, which is placed before the class code, but the first classification is not indicated.

The machine tool category code is shown in Table 2-12.

2) The characteristic code of the machine tool The characteristic code of the machine tool, including general characteristics and structural characteristics, is also represented by Chinese pinyin letters. When a certain type of machine tool, in addition to the ordinary type, there are various general characteristics listed in Table 2-13, the corresponding general characteristic code should be added after the category code, such as in the CM6132 model"m"Representation"Precision"It means that it is a precision ordinary lathe. The structural characteristic code is to distinguish machine tools with the same main parameters but different structures, such as CA6140 and C6140 are ordinary lathes with different structures and the same main parameters.

When the machine tool has a general property code and also has a structural property code, the structural property code should be ranked after the general property code. In addition, the letter of the structural characteristic code is specified separately according to the situation of each type of machine tool, and the meaning can be different in different models. The letters and letters used in the generic feature code"i""o"It cannot be used as a structural property code.

3) the group and type code of the machine tool Each type of machine tool is divided into several groups, and each group is divided into a number of types. A two-digit number is used as the group and type code, which is placed after the category and feature code, with the first digit indicating the group and the second digit indicating the type.

4) Main parameters The main parameters that represent the specifications and processing capacity of the machine tool, are expressed in two-digit decimal numbers and converted values. For example, the main parameter of the lathe is the maximum rotation diameter of the workpiece, and its mm number is divided by 10, which is the main parameter value. Sometimes, in addition to the main parameter, the second main parameter (also with the converted value) needs to be indicated in the model"×"number separately.

5) The serial number of the major improvement of the machine tool The performance and structure of the machine tool have been significantly improved, and the English letters A, B, C, D should be used after the original machine tool modelIndicates that it is the ordinal number of the first improvements, such as Y7132A and Z3040A, both indicate that it is the first major improvement. In addition, the number of spindles of multi-axis machines should be indicated in Arabic numerals after the model number and used in combination"

G: Main** M: Hold**, T: Tool**, S speed**, generally just a few. Or if while,

The meaning of numerical control is introduced as follows:

Numerical control technology refers to the technology of using digital instructions composed of numbers, words and symbols to realize the action control of one or more mechanical equipment. It usually controls mechanical quantities such as position, angle, velocity, etc., as well as switching quantities related to the direction of mechanical energy flow. The generation of numerical control depends on the emergence of data carriers and binary form data operations.

1) However, due to the fact that a high-precision imported CNC grinding machine costs about 4 million yuan, it is daunting for some manufacturers.

2) The shearing angle is automatically adjusted by the numerical control system, which can prevent the distortion of the workpiece caused by the simultaneous shearing process.

3) Divided power chucks are widely used in CNC lathes and automatic special machines, and are used in automobiles, internal combustion engines, engines, refrigeration valves, HVAC and other industries.

4) This article introduces a "microprogram numerical control bonding machine" made using the principle of coordinate rotation computer.

5) With the extension of the industrial chain of mold enterprises, the purchase of precision plastic machinery and CNC forging equipment has also increased year by year.

6) Guzhen Woka Lighting Factory, Zhongshan City, Guangdong Province, is a professional manufacturer of aluminum lighting products integrating metal stamping and CNC machining equipment.

7) At the same time, the design method and design process of magnetic bearing spindle unit of ultra-high-speed CNC precision cylindrical grinding machine were proposed for the first time.

8) However, the all-CNC gear hobbing machine and its series products with a wider range of applications, higher flexibility, high speed and high efficiency are still blank in China, and there are no mature products.

9) The extraction technology of spindle motor current signal in freeform CNC machining is analyzed, and it is pointed out that Hall current sensor is an effective method.

Numerical control: It is a technology that uses digital information to control mechanical movement and processing process.

Numerical control, also known as computer numerical control, is a technology that uses digital information to control mechanical movement and processing process, and is mostly used in automated production, CNC machine tools, robotic arms and other fields.

Computer digital control, which is the technology of using computers to achieve digital program control. This technology uses a computer to perform the operation sequence logic control function of the movement trajectory of the equipment and the peripherals according to the pre-stored control program. Because the computer is used to replace the numerical control device composed of the original hardware logic circuit, the storage, processing, calculation, logic judgment and other control functions of the input operation instructions are realized, and the microscopic instructions generated by the processing are sent to the servo drive device to drive the motor hydraulic actuator to drive the equipment to run.

Advantages of CNC machining:

1. Greatly reduce the number of tooling, and do not need complex tooling for processing parts with complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.

2. The processing quality is stable, the processing accuracy is high, and the repeatability is high, which can meet the processing requirements of the aircraft.

3. The production efficiency is higher in the case of multi-variety and small-batch production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the best amount of cutting.

4. It can process complex surfaces that are difficult to be processed by conventional methods, and even some processing parts that cannot be observed.

The disadvantage of CNC machining is that the machine tool equipment is expensive, and the maintenance personnel are required to have a high level.

1) The meaning of the basic terms of tolerance.

1) Basic size; The size given at the time of design is called the base size. 2) Actual size: The size obtained by measurement after the processing of the part is called the actual size.

3) Limit size: The two limit values that allow the actual size to vary are called the limit size. It is determined in basic dimensions.

The greater of the two limit values is called the maximum limit dimension dmax (or dmax); The smaller one is called the limit dimension dmin (or dmin).

It should be digital control.

Numerical control (English name: numerical control abbreviation: NC) technology refers to the technology of using digital instructions composed of numbers, words and symbols to realize the action control of one or more mechanical equipment.

CNC is generally the use of general or special computers to achieve digital program control, so CNC is also known as computer numerical control (computerized numerical control), referred to as CNC, foreign countries are generally called CNC, rarely use the concept of NC.