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u200bAutomatic programming for mechanical parts processing manufacturers

by:Yifeng Metal     2022-03-14

Automatic programming of Changzhou mechanical parts processing manufacturers

Automatic programming of CNC lathe processing refers to the process of automatically generating parts processing programs by a computer with the help of a numerical control language programming system or a graphics programming system. The programmer only needs to use the numerical control programming language defined by the numerical control language programming system or the graphic menu function provided by the graphic programming system according to the processing tools and process requirements, to make a more convenient view of the processing process and requirements, and the programming system automatically calculates. Out the machining action track, and output the part CNC machining program. Since the programmed graphics and feed track can be automatically drawn on the computer, it is possible to check whether the program is wrong in time, and make corrections to obtain the correct program.

CNC lathes have many techniques for machining the inner hole surface of parts, commonly used are drilling, reaming, reaming, boring, turning, grinding, pulling, grinding, honing, rolling Press holes, etc.

Applicable skills for inner hole processing of CNC lathe parts:

Hole reaming: reaming is to further process the drilled hole with a reaming drill to expand the hole diameter and improve the accuracy and lower surface roughness values. The size that can be reached by reaming is IT11~IT10, and the surface roughness value is Ra12.5~6.3μm, which belongs to the semi-finishing technique of the hole. It is often used for pre-processing before reaming, and can also be used as a precision tool. Final machining of tall holes.

1. Drilling: Drilling holes in the solid part of the workpiece with a drill is called drilling. Drilling is rough machining, the size that can be reached is IT13~IT11, and the surface roughness value is Ra50~12.5μm. It is due to the long length of the twist drill, the small diameter of the drill core and the poor rigidity, and the influence of the chisel edge.


2. Reaming: Reaming is performed in semi-finishing (reaming or semi-finishing boring). ) is a finishing technique for holes on the base. The size of the reamed hole can reach IT9~IT6, and the surface roughness value can be Ra3.2~0.2μm. There are two ways of reaming: organic reaming and hand reaming. Reaming at the length of the machine tool is called machine reaming, and reaming by hand is called hand reaming.

3. Turning hole: The turning hole on the lathe is the workpiece twisting and the turning tool moving. The aperture size can be controlled by the cutting depth of the turning tool and the number of passes, which is more convenient to operate. Lathe holes are mostly used to process holes for disc sleeves and small bracket parts.

4. Boring: Boring is the further processing of drilled, cast or forged holes with a boring tool. Can be held on long lathes, boring machines or milling machines. Boring is one of the commonly used hole processing techniques, which can be divided into rough boring, semi-fine boring and fine boring. The size of rough boring is IT13~IT12, and the surface roughness value is Ra12.5~6.3μm; the size of semi-fine boring is IT10~IT9, and the surface roughness value is Ra6.3~3.2μm; The size of the boring is IT8~IT7, and the surface roughness value is Ra1.6~0.8μm.

Before starting up the CNC machine tool, a comprehensive and detailed inspection should be carried out, including the control panel, guide rail surface, jaws, tailstock, tool rest, tools, etc.

1. After the CNC lathe is powered on, check whether the switches, buttons and keys are normal and flexible, and whether the machine tool has any abnormal signs.

2. After the program is input, carefully check the CNC lathe machining code, location, numerical value, positive and negative sign, and decimal point.

3. Correctly measure and calculate the workpiece coordinate system. And check the results obtained?? · Input the workpiece coordinate system, and the coordinates. Check the coordinate value, sign and decimal point carefully

4. Before installing the workpiece, run the program once to see if the program can be executed smoothly, whether the installation of tools and fixtures is reasonable, and whether there is 'overtravel'. '.

5. The speed override switch must be set to low gear when cutting.

6. During cutting feed, when the tool runs to 30~50mm of the workpiece, it is necessary to verify whether the Z-axis and X-axis coordinate surplus values u200bu200bare consistent with the machining program under the feed connection.

7. During cutting and machining, after sharpening the tool and changing the tool, it is necessary to re-measure the tool position and change the tool compensation value and tool compensation number.

8. After the sequence modification, it is necessary to check the modification carefully.

9. The head bed can only be started after confirming that the workpiece is clamped. It is strictly forbidden to measure and touch the workpiece when the workpiece is rolling.

10. The vehicle must be parked and punished if there are abnormal conditions such as workpiece jumping, shaking, abnormal sound, and loosening of fixtures during operation.

11. After emergency parking, the machine tool 'return to zero' should be re-operated to run the program again.



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