The design and research of the reciprocating spin electroplated diamond wire saw CNC cutting machine controls the wire saw rotation, and realizes the cutting and curve processing of non-metallic hard and brittle materials on the two-bedroom CNC workbench. Through the use of electroplated diamond inner circular saw blades to cut silicon wafers Schematic diagram. As a linear tool, electroplated diamond wire saw has the same processing performance as other superhard material electroplated tools. There have been many reports on processing equipment using electroplated diamond wire saw as a tool at home and abroad. Although 2 reciprocating spin electroplated diamond wire saw CNC cutting machine is designed with electroplated diamond wire saw as a tool, the processing equipment has different structural characteristics due to the difference of its main motion form. Generally can be divided into translation type and rotary type. The translational type refers to the reciprocating translational movement of the mechanism where the wire saw is installed; the rotary type refers to the movement of the wire saw driven by the rotating mechanism. The electroplated diamond wire saw CNC cutting machine we designed this time is a translational type.
2. Structural features show the structure diagram of the reciprocating spin electroplated diamond wire saw CNC cutting machine.
It can be seen from the picture that the saw frame of the wire saw which is tensioned by the spring is driven by the cylinder during processing of the cutting machine to realize the reciprocating cutting movement. The material to be processed is installed on a two-dimensional numerical control worktable, and the worktable is controlled by the numerical control device to realize one-dimensional or two-dimensional feed, thereby completing the precision of the straight line or curve of the processed material. There are two obvious features of this cutting machine. Features. One is that the driving device adopts the air cylinder to utilize the characteristics of adjustable and constant cylinder speed to ensure that the wire saw can remain unchanged. Adjustable cutting speed implements cutting processing of different materials. The reversing device at both ends of the cylinder can also reduce the reversing impact of the wire saw to prevent the wire saw from being broken due to the impact force when reversing. The use of air cylinders as the driving device is particularly suitable for occasions that have been equipped with air sources. The second is to use the stepper motor to drive the wire saw to continuously rotate at a small angle to achieve “spin”, which enables the cutting edges of the multi-edge wire saw coated with diamond abrasive particles to participate in the cutting evenly, reducing one-way Structure diagram of the cutting machine The cutting machine has a wide range of technology. It can not only make close friends with various rod-shaped and plate-shaped materials, but also conduct small hole training. The size range of the material to be processed can be formed into different specification series according to the stroke of the cylinder, the structure of the saw frame and the moving distance of the worktable to meet different requirements.
2. Cylinder parameter selection and calculation The main technical parameters of the cylinder are cylinder diameter and stroke stroke are determined according to the largest diameter of the cylindrical material to be processed. The cutting machine designed this time can process materials (such as ceramic rods) with a maximum diameter of 70mm, so the stroke of the selected cylinder is 160mm. The size of the cylinder diameter determines the output force of the cylinder, which is determined by the external load. When the cutting machine cuts, the external load on the cylinder includes the cutting force of the wire saw when cutting, the gravity of the saw frame, and the frictional force of the moving pair when the saw frame moves along the guide rail. In order to determine the value of the cylinder diameter, take the saw frame as the research object and consider the upward movement of the saw frame as the cylinder’s maximum thrust state. Set the air supply pressure as P. The cylinder thrust is F. The wire saw cutting force is F line. The saw frame gravity is G. The contact pressure is N, the friction force is F, the friction coefficient is and each length dimension //, the force state of the saw frame and the expression of each parameter can be seen based on the balance principle of force and moment. PN from the formula (2): The relationship between each parameter and the productivity can be found only by the experiment. Due to the limitation of conditions, our F motor F gas is cut by grinding instead of cutting by the wire saw, so it can be known that the F wire is very small and the corpse wire 3 processing technology. There are reports. However, these studies are mainly carried out on high-speed rotating filament saws. The discussion on the processing technology of the reciprocating circular parallel wire saw is rare because of its few mechanisms. Therefore, when we use the designed reciprocating spin electroplated diamond wire saw CNC cutting machine to process non-metallic hard and brittle materials, the cutting parameters There is no ready-made experience for the choice. Exploratory experiments can be used as our best method. Wire saw cutting is based on grinding instead of cutting, so productivity is the main technical indicator. There are many factors affecting the cutting productivity of electroplated diamond wire saws, such as cutting speed, feed speed, and the particle size and concentration of electroplated diamond abrasive particles. The size has a greater impact, only through a large number of repeated small-scale simulation experiments, under the selected process parameters on the reciprocating spin electroplated diamond wire saw CNC cutting machine designed and manufactured ceramic tube cutting and Plate glass cutting experiments conducted preliminary research on the performance and cutting productivity of the cutting machine. The test uses an electroplated diamond wire saw, with a wire diameter of 0.5mm, diamond abrasive grains of 150, and a ceramic tube with an outer diameter of <27mm and an inner diameter of felmm. The thickness of the plate glass For a 5mm cutting length of 301mm, the cutting process parameters are, the cutting speed of cutting the ceramic tube is 0.6m/s, the feed rate is 3.2mm/min cycle; the cutting speed of glass is 0.8m/s, the feed rate is 5. 6mm/ Emulsion is used for cooling during min cycle cutting. The whole cutting test is relatively smooth, and the cutting process is smooth and normal. It’s just that the tension of the wire saw must be very careful. The wire saw is easy to be broken during cutting with high tension. The tension of the wire saw is small, and the wire saw is easy to be bent when feeding, which makes the processing track offset. In addition, for the cutting friends of the translation mechanism, because the wire saw is short, the life of each wire saw is relatively short. When cutting long length and thick materials, the wire saw must be replaced during the cutting process, which increases the processing assistance time and affects the productivity. The improvement. But in terms of wire saw wear, short wire saws are better than filament saws in some aspects. After testing, the actual processing time is used to cut the ceramic tube. The productivity is 25mm2/min. The productivity of flat glass is 28mm2/min. Increase the cutting speed, which can increase the productivity. However, the movement of the translation mechanism limits the increase in speed, so it is not suitable to use too high cutting speed. . The surface roughness of the ceramic tube and glass after cutting is Ra3.2~lm. For the cut ceramic tube, see 4 Conclusion. Through the design of the reciprocating spin electroplated diamond wire saw CNC cutting machine and the cutting experiment on non-metallic hard and brittle materials, you can see The structure design of the reciprocating spin electroplated diamond wire saw CNC cutting machine is reasonable and has its own characteristics. After adopting the air cylinder as the driving device, the whole mechanism is compact and simple. This structure is convenient for miniaturization and economic efficiency, and is especially suitable for laboratory use. The cutting machine has a wide process range, and uses an electroplated diamond wire saw as a tool, which can perform one-dimensional and two-dimensional precision cutting of non-metallic hard and brittle materials and difficult-to-add materials with high cutting efficiency and cutting accuracy. The cutting machine can also be used for the training of small holes, which is also of special significance. However, the cutting machine also has defects. The inertia of the translation mechanism limits the increase in cutting speed. The large commutation impact can easily cause the wire saw to break. Reasonable process parameters A large number of experiments should be carried out to study the dynamic characteristics of the selection and processing process. In short, in order to make the cutting machine a real investment, it is necessary to carry out in-depth work in the structural form (for example, the saw frame adopts the hoisting type), the selection of component materials and the process test.
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