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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette

Elimination of Gear Backlash in CNC Machining Feed System

Elimination of Gear Backlash in CNC Machining Feed System   The transmission gear in the feed system of the CNC machining machine tool must eliminate the transmission gap between the meshing gears as much as possible, otherwise the motion will lag behind the command signal after each reversal of the feed system, which will affect the machining accuracy (accuracy) ). There are the following two common methods for CNC machining machine tools to eliminate the transmission gear gap.   1. Rigidity adjustment method   The rigid adjustment method is an adjustment method that cannot be automatically compensated for the tooth side clearance after adjustment. Therefore, the pitch tolerance and tooth thickness of the gear must be strictly controlled, otherwise the flexibility of the transmission will be affected. This adjustment method has a relatively simple structure and a better transmission rigidity.   (1) Eccentric shaft adjustment method   As shown in Figure 610, the gear 1 is mounted on th

Selection of Surface Machining Methods for Inner Hole of CNC Lathe Machined Parts

Selection of Surface Machining Methods for Inner Hole of CNC Lathe Machined Parts

 

There are many methods for surface processing of inner holes of CNC lathes. Commonly used are drilling, reaming, reaming, boring, turning, grinding, drawing, grinding, honing, and rolling holes.

 

Applicable method for inner hole machining of CNC lathe machined parts:

 

1. Drilling:

Drilling holes in the solid part of the workpiece with a drill is called drilling. CNC cutting is a process method for parts processing on CNC machine tools. The process regulations of CNC machine tool processing and traditional machine tool processing are generally the same, but significant changes have also taken place. A machining method that uses digital information to control the displacement of parts and tools. It is an effective way to solve the problems of variable parts, small batches, complex shapes, and high precision, and to achieve high-efficiency and automated processing. The drilling is rough swiss machining, and the dimensional tolerance level that can be reached is IT13~IT11, and the surface roughness value is Ra50~12.5μm. Is it due to the long length of the twist drill, the small core diameter and poor rigidity, as well as the influence of the chisel edge.

 

2. Reaming:

Reaming is a finishing method for holes on the basis of semi-finishing (reaming or semi-finishing boring). In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and letters, and the processing required by the processing technology. It generally refers to the process of processing parts on CNC machine tools. In order to improve the degree of production automation, shorten the programming time and reduce the cost of CNC machining, a series of advanced CNC drilling technologies have been developed and used in the aerospace industry. The size tolerance of the reaming hole can reach IT9~IT6, and the surface roughness value can be Ra3.2~0.2μm. There are two ways of reaming: organic hinge and hand hinge. Reaming on a machine tool is called a machine hinge, and a manual reaming is called a hand hinge.

 

3. Car hole:

The turning hole on the lathe is the rotation of the workpiece and the movement of the turning tool. The aperture size can be controlled by the cutting depth of the turning tool and the number of passes, which makes the operation more convenient. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and letters, and the processing required by the processing technology. It generally refers to the process of processing parts on CNC machine tools. In order to improve the degree of production automation, shorten the programming time and reduce the cost of CNC mill-turn, a series of advanced CNC machining technologies have been developed and used in the aerospace industry. Lathe turning holes are mostly used to process the holes of disc sleeves and small brackets.

 

4. Boring:

Boring is the further processing of holes that have been drilled, cast or forged with a boring tool. It can be carried out on a lathe, boring machine or milling machine. Boring is one of the commonly used hole processing methods, which can be divided into rough boring, semi-fine boring and fine boring. The dimensional tolerance grade of rough boring is IT13~IT12, and the surface roughness value is Ra12.5~6.3μm; the dimensional tolerance grade of semi-finish boring is IT10~IT9, and the surface roughness value is Ra6.3~3.2μm; The dimensional tolerance grade is IT8~IT7, and the surface roughness value is Ra1.6~0.8μm. here is about our partner.

 

5. Reaming:

Reaming is to use a reaming drill to further process the drilled hole to enlarge the aperture and improve the accuracy (precision) and reduce the surface roughness value. The dimensional tolerance level that can be achieved by reaming is IT11~IT10, and the surface roughness value is Ra12.5~6.3μm. It belongs to the semi-finishing method of hole processing. It is often used as pre-processing before reaming, and can also be used as precision (precision). The final machining of holes that are not high.

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 Copyright notice: This article comes fromhttps://be-cu.com/micromachining/

 

 


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