Deep hole drilling machine processing features
The continuous development of science and technology has driven the progress of all walks of life. In terms of machinery, the use of deep hole drills is quite extensive. Deep hole drilling machine is an essential mechanical product in deep hole machining. So what are the characteristics of deep hole drilling machine processing? If you don't know it yet, follow Xiaobian to see it.
1. The arbor is limited by the hole diameter, small in diameter and large in length, resulting in poor rigidity and low strength. It is easy to generate vibration, corrugation, and taper during cutting, which affects the straightness and surface roughness of the deep hole.
2. When drilling and reaming holes, the cooling lubricating fluid is difficult to input into the cutting area without using a special device, so that the tool durability is reduced, and chip evacuation is also difficult.
3, in the deep hole machining process, can not directly observe the tool cutting conditions, can only be judged by working experience listening to the sound of cutting, see the chip, hand touch vibration and workpiece temperature, view meter (oil pressure meter and electricity meter) to judge Is the cutting process normal?
4. If chips are difficult to remove, reliable methods must be used to break chips and control the length and shape of the chips so as to facilitate smooth removal and prevent chip jams.
5, in order to ensure that the deep hole in the process of processing and to achieve the required processing quality, should increase the tool (outside) chip removal device, tool guide and support device and high pressure cooling lubrication device.
In general, the hole depth is more than 3 to 5 times of the hole diameter, which is called deep hole. Its difficulty is in the chip removal and cooling drilling depth. The relatively small hole can use twist drill, in order to remove the chips smoothly, the iron chips should become thin strip straight. Comes out and brings out smaller pieces, while the coolant is easy to enter. The grinding method of the drill bit can use a relatively simple grinding method.
1, The angle of the cutting edge is increased to 130-140 degrees to increase the chip thickness and change the direction of chip discharge (the chip discharge direction is perpendicular to the cutting edge)
2. Trimming the traverse edge to reduce the axial cutting blade and the cutting edge to generate a knuckle at the core to facilitate swarf cutting.
3, if the drilling diameter is larger, you can grind the debris flutes on one side of the cutting edge. It should be wider and wider to balance the cutting forces of the two cutting edges. If the diameter is large, you can use two cutting edges to grind the flutes.
4, in the outer edge of the edge down 1 mm 45 degrees to reduce wear and improve the finish.
5. The rotational speed of the drill hole is slightly lower, and the feed amount should be larger, so that the thickened chips are discharged in strips.
6, The nozzle of the coolant should face the hole in order to facilitate the coolant into the cutting area.
When the hole diameter ratio is more than 8 times larger than the bulk of the best drilling in a dedicated deep hole drilling machine, the effect is very high, I have tried to produce lathe spindle diameter 32 length of about 850 mm material 45 steel only 13 minutes minutes.
The deep hole drill has two kinds of chip removal and chip removal.
Smaller diameter chips are used for effluent removal because the drill pipe is too small to remove swarf. The hole with a large diameter has enough space for chip evacuation. High-pressure oil is pressed between the hole wall and the drill pipe. The heat is discharged from the rod. The drill is a special carbide used in general. It is divided into two parts: the guide and the chip edge. The chip is ground into a trapezoidal shape to divide the chip. The height and width of the chip breaker are determined by the material and feed of the workpiece. It is better to ensure that the chip shape is a tight C shape or a tile shape.
The continuous development of science and technology has driven the progress of all walks of life. In terms of machinery, the use of deep hole drills is quite extensive. Deep hole drilling machine is an essential mechanical product in deep hole machining. So what are the characteristics of deep hole drilling machine processing? If you don't know it yet, follow Xiaobian to see it.
1. The arbor is limited by the hole diameter, small in diameter and large in length, resulting in poor rigidity and low strength. It is easy to generate vibration, corrugation, and taper during cutting, which affects the straightness and surface roughness of the deep hole.
2. When drilling and reaming holes, the cooling lubricating fluid is difficult to input into the cutting area without using a special device, so that the tool durability is reduced, and chip evacuation is also difficult.
3, in the deep hole machining process, can not directly observe the tool cutting conditions, can only be judged by working experience listening to the sound of cutting, see the chip, hand touch vibration and workpiece temperature, view meter (oil pressure meter and electricity meter) to judge Is the cutting process normal?
4. If chips are difficult to remove, reliable methods must be used to break chips and control the length and shape of the chips so as to facilitate smooth removal and prevent chip jams.
5, in order to ensure that the deep hole in the process of processing and to achieve the required processing quality, should increase the tool (outside) chip removal device, tool guide and support device and high pressure cooling lubrication device.
In general, the hole depth is more than 3 to 5 times of the hole diameter, which is called deep hole. Its difficulty is in the chip removal and cooling drilling depth. The relatively small hole can use twist drill, in order to remove the chips smoothly, the iron chips should become thin strip straight. Comes out and brings out smaller pieces, while the coolant is easy to enter. The grinding method of the drill bit can use a relatively simple grinding method.
1, The angle of the cutting edge is increased to 130-140 degrees to increase the chip thickness and change the direction of chip discharge (the chip discharge direction is perpendicular to the cutting edge)
2. Trimming the traverse edge to reduce the axial cutting blade and the cutting edge to generate a knuckle at the core to facilitate swarf cutting.
3, if the drilling diameter is larger, you can grind the debris flutes on one side of the cutting edge. It should be wider and wider to balance the cutting forces of the two cutting edges. If the diameter is large, you can use two cutting edges to grind the flutes.
4, in the outer edge of the edge down 1 mm 45 degrees to reduce wear and improve the finish.
5. The rotational speed of the drill hole is slightly lower, and the feed amount should be larger, so that the thickened chips are discharged in strips.
6, The nozzle of the coolant should face the hole in order to facilitate the coolant into the cutting area.
When the hole diameter ratio is more than 8 times larger than the bulk of the best drilling in a dedicated deep hole drilling machine, the effect is very high, I have tried to produce lathe spindle diameter 32 length of about 850 mm material 45 steel only 13 minutes minutes.
The deep hole drill has two kinds of chip removal and chip removal.
Smaller diameter chips are used for effluent removal because the drill pipe is too small to remove swarf. The hole with a large diameter has enough space for chip evacuation. High-pressure oil is pressed between the hole wall and the drill pipe. The heat is discharged from the rod. The drill is a special carbide used in general. It is divided into two parts: the guide and the chip edge. The chip is ground into a trapezoidal shape to divide the chip. The height and width of the chip breaker are determined by the material and feed of the workpiece. It is better to ensure that the chip shape is a tight C shape or a tile shape.
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