Ultrafine deep and long hole drilling machining method
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A processing method, the technology of deep and long holes, which is applied in the field of ultra-fine deep and long hole drilling, can solve the problems of weak rigidity and low efficiency, and achieve the effects of improving matching, optimizing process parameters and overcoming weak rigidity problems
Inactive Publication Date: 2020-12-01
SHANGHAI SPACE PRECISION MACHINERY RES INST
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[0003] The object of the present invention is to provide a method for drilling ultra-thin deep and long holes, which solves the problems of weak rigidity, low efficiency and depth in the
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Embodiment 1
[0042] In the first embodiment of the present invention, the inner diameter of the deep hole is Φ6mm, the length is 198mm, the precision grade is IT9, the material of the parts is forged aluminum alloy, the quantity is 8, and the processing time for a single deep hole is required to be within 2 minutes. The embodiment is completed on a horizontal four-axis machining center, and the specific technological process is as follows:
[0043] 1) Clamping
[0044] Using a horizontal four-axis machining center, the worktable rotates along the B axis to clamp the workpiece;
[0045] 2) Plane milling
[0046] Adopt Φ6mm end milling cutter, the bottom edge passes through the center, Z-direction feed, the spindle speed is 1000r / min, the feed speed is 40mm / min, and the milling is enough.
[0047] 3) Drill the centering hole
[0048] Using Φ2mm center drill, shank diameter Φ6mm, spindle speed 1000r / min, feed speed 100mm / min, drilling to a depth of 1.5mm.
[0049] 4) Drill pilot holes
...
Embodiment 2
[0062] In the second embodiment of the present invention, the inner diameter of the deep hole is Φ4mm, the length is 80mm, the precision grade is IT9, the material of the parts is forged aluminum alloy, the quantity is 8, and the processing time for a single deep hole is required to be within 2 minutes. The embodiment is completed on a horizontal four-axis machining center, and the specific technological process is as follows:
[0063] 1) Clamping
[0064] Using a horizontal four-axis machining center, the worktable rotates along the B axis to clamp the workpiece;
[0065] 2) Plane milling
[0066] Using Φ4mm end mill, the bottom edge passes through the center, Z-direction feed, the spindle speed is 1000r / min, the feed speed is 40mm / min, and the milling is enough.
[0067] 3) Drill the centering hole
[0068] Using Φ2mm center drill, shank diameter Φ6mm, spindle speed 1000r / min, feed speed 100mm / min, drilling to a depth of 1.5mm.
[0069] 4) Drill pilot holes
[0070] Usi...
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Abstract
The invention provides an ultrafine deep and long hole drilling machining method. The method comprises the steps including milling a plane; drilling a centering hole; drilling a guide hole; entering aguide hole in through a deep hole drill; normal feeding of the deep hole drill; deep hole drill feeding at a low rotating speed; deep hole drill retracting; and inspection. In the whole process route, firstly, the guide hole is machined; then, the inner-cooling deep hole drill is adopted for one-time continuous machining to the final depth; the machining quality of an ultrafine deep and long hole, the stability of the machining process and the reliability of the process are guaranteed through various measures such as selection of an efficient tool, reasonable planning of the process route andcalculation and optimization of process parameters, the non-cutting time of pecking drilling and retracting is omitted, and the deep hole machining efficiency is improved. According to the method, the problems of chip removal, cooling and lubrication in deep and long hole closed space machining are solved through an inner-cooling deep hole drilling tool, a reasonable process route is designed, the stability of the machining process and the reliability of the machining precision are guaranteed, one-time feeding machining of the ultrafine deep and long hole is achieved, and the machining efficiency of the deep hole is improved.
Description
technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to an ultra-thin deep and long hole drilling method. Background technique [0002] Hole processing is an important part of mechanical processing. Compared with ordinary holes, the ultra-thin deep and long hole processing has a smaller diameter, a longer depth, and a length-to-diameter ratio generally between 20 and 35. Cooling lubrication and chip breaking during processing The chip is more difficult, the cutting temperature is higher, the rigidity of the processing tool is very poor, the stability of the ultra-fine deep and long hole processing process is even worse, and it is more difficult to guarantee the processing accuracy of the deep and long hole. The traditional processing method adopts the peck drilling process. It can improve chip removal, cooling and lubricating effects in deep hole machining by using single tool retraction. However, there are still man...
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