CNC milling knowledge will come to 100

1. The adaptability and flexibility of parts processing are strong, and the parts with particularly complex contours and shapes or difficult to control the size can be processed, such as mold parts, shell parts, etc. 2. It can process parts that cannot be processed by ordinary machine tools or are difficult to process, such as complex curve parts described by mathematical models and three-dimensional space surface parts. 3. It can process parts that need to be processed in multiple processes after a clamping and positioning.

4. High processing accuracy, stable and reliable processing quality. 5. The high degree of production automation can reduce the labor intensity of the operator. It is conducive to the automation of production management.

6. High production efficiency. 7. From the cutting principle, whether it is end milling or circumferential milling, it is an intermittent cutting method, and it is not continuous cutting like turning, so it has high requirements for the tool, and has good impact resistance, toughness and wear resistance. In....

CNC is numerical control. Digital program for CNC machining. With directives (g, m, h, s, f), and analogues. axis**, (x,y,z,a,b,), etc.

Learn CNC programming to pay attention to the following points:1.

There is some mechanical knowledge base and mold structure.

2.There are two kinds of manual and computer software for CNC programming, manual programming has a certain mathematical basis, coordination, and the direction to be cleared (x, -x, y, -y) is very important. 3.

Proficient in computer software programming, proficient in using software (e.g. Mastercam, UG, Pro-E), etc., there are machining and mold machining, quick learning of 2D drawing and 3D design, memorization of commands (e.g. G, M), etc.

4.Know how to operate the performance of the machine (such as Mitsubishi, Fanuc, Simon, HASS), etc.

and tool grinding.

5. Look at the actual factory, depending on the processing of the material, it may be the speed of the tool, run to the speed, and eat in moderation.

6.Ask, think, take notes, make the first mistake, and never have a second time.

CNC milling workers are personnel engaged in compiling CNC machining programs and operating CNC milling machines for parts milling.

Milling workers are technical workers who process parts with milling machines (equipment for processing parts) according to the design parts drawings, and are divided into junior workers, intermediate workers, and senior workers. The machining accuracy of its parts is required to be high. Milling certificate is Tuanchang milling professional qualification certificate, the certificate level is divided into primary, intermediate or take, senior, technician, senior technician, the certificate issued by the Ministry of Labor and Social Security.

Milling is a very important type of work in the manufacturing industry, and it is a complex processing process for special tool parts. Millers must not only have knowledge of the machine tools that are often used, but also be proficient in calculations and adjustments, such as indexing and angle measurement. Shirt or gear spline turbine forming and so on are the "specialty" of millers.

Tools and molds are inseparable from the participation of millers.

The milling process is mainly used to use milling machines to process various special-shaped or grooves, such as the tooth surface of gears, the keyway of parts, etc.

Safety Operating Procedures

1. Work clothes must be worn when entering the workplace. Gloves are not allowed to be worn during operation (to prevent gloves from hanging on knives, which can lead to accidents), and female students must wear work caps (to prevent hair from being too long and getting involved in the machine).

2. Before starting, check whether the position of the handle of the machine tool and the clamping of the tool are firm and reliable, and whether the direction of movement of the tool and the feed direction of the worktable are correct.

3. Fill each oil injection hole, idle test run (you must drive slowly in winter) for more than 2 minutes, check the oil window and other parts, and listen to whether the sound is normal.

Fourth, when cutting, drive first, if you stop halfway, you should stop feeding first, and then stop after retracting the knife.

Fifth, concentrate, stick to the post, must stop when leaving, the machine tool is not allowed to overload.

6. It is not allowed to accumulate too many iron filings on the workbench, and tools or other objects are prohibited from being placed on the workbench and track surface, and the tools should be placed in the designated position.

Selection of machine tools: According to the requirements of the parts drawing, the economical CNC milling machine can be used to meet the requirements. Therefore, XKN7125 CNC vertical milling machine is selected.

Select the tool: A 10 flat bottom end mill is now used, defined as T01, and the diameter of the tool is entered into the tool parameter table.

Determine the workpiece coordinate system and tool setting point: In the XOY plane, determine the workpiece center as the workpiece origin, and the z-direction with the workpiece surface as the workpiece origin, and establish the workpiece coordinate system, as shown in Figure 2-23. The manual tool setting method (the operation is the same as that of the CNC milling machine tool setting method introduced earlier) uses the point o as the tool setting point.

Write the program: according to the instructions and program section format specified by the machine tool, the entire process of the processed parts is compiled into a program list. Considering the groove shown in the processing diagram, the depth is 4, and the depth of cutting is 2 each time, and the secondary processing is completed, then it is convenient to program, and the number of instructions is reduced at the same time, and sub-programs can be used.

The machining procedure for this workpiece is as follows (this program is used for XKN7125 milling machine):

n0010 g00 z2 s800 t1 m03

n0020 x15 y0 m08

n0030 g20 n01 p1.-2；Adjust the subroutine once, and the slot depth is 2

n0040 g20 n01 p1.-4；Adjust the subroutine again, and the slot depth is 4

n0050 g01 z2 m09

n0060 g00 x0 y0 z150

n0070 m02；The main program ends.

n0010 g22 n01；The subroutine begins.

n0020 g01 zp1 f80

n0030 g03 x15 y0 i-15 j0

n0040 g01 x20

n0050 g03 x20 yo i-20 j0

n0060 g41 g01 x25 y15 ；The left cutter fills the square with the four corners rounded.

n0070 g03 x15 y25 i-10 j0

n0080 g01 x-15

n0090 g03 x-25 y15 i0 j-10

n0100 g01 y-15

n0110 g03 x-15 y-25 i10 j0

n0120 g01 x15

n0130 g03 x25 y-15 i0 j10

n0140 g01 y0

n0150 g40 g01 x15 y0；Left knife supplement canceled.

n0160 g24；The main program ends.

1. Feed control instructions.

1.Quickly locate the specified g00

Format: g00 x y z

wherein, x, y, z are the fast positioning end points, and at g90, the end points are the coordinates in the workpiece coordinate system; At g91 is the displacement of the end point relative to the starting point.

2.Linear imputation instruction G01

Format: g01 x y z f

where x, y, z are the end points, and at g90 are the coordinates of the end points in the workpiece coordinate system; At g91 is the displacement of the end point relative to the starting point.

f is the pass speed.