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Knowledge of leaf cutter
Axial flow turbine blade root flange surface machining using ball-end mill. The central part of the tool ball tends to zero cutting speed, cutting in poor condition, easy to produce plug and cutter chip chipping. Ball End Domestic difficult now with Hitachi tool.
Ball Mills
Leaves out, water's edge and groove Xu Yong 80, 63 spiral mills. Foreign prices of about 1.7 to 2.7 tool yuan / to, and domestic prices spiral cutter is about the 1 / 4 to 1 / 8. Our cooperation in the development of Taiyuan Ace Tool Factory stainless steel blade suitable for processing spiral milling cutter, the cutter blade screw clamping structure for the paperback. Enhance capacity grove, increased helix angle, which will help chip removal and to make cutting light; cutter tip is involved in cutting up the site, also the most easily damaged, use can dramatically change the structure of the first extension of the cutter body life; improvement can change head design, increased capacity in the bottom edge of chip space and vice posterior horn, to avoid the common plug and play integrated chip knife phenomenon; side edge of change 2 to 4 blade cutting edge, has greatly improved the most vulnerable to damage in this area conditions; Week edge blade with side increased by the translocation of 2 to 4 times the utilization rate of advancement of the blade.
Helical End Mills
Large leaf surface machining region, forging surface machining allowance is 0 ~ 70mm, rough milling process air generated when operating conditions. Purchased from Germany Wadelixi. Kebao Gong Secretary of milling machine equipped with the world's most powerful CNC milling head, for the realization of large depth of cut, large feed provides the premise. And the Kazakhstan Institute of Technology, cotton factory co-workers developed a tool they feel double-edged sword special face milling cutter tooth structure, promising to cut depth of 20mm.
Special Face Milling
Unequal distribution of selected pitch, to reduce cutting vibration have better results.
Mills pitch distribution
Small value may increase after the election angle cutter strength, toughness of the material but leaves a large order to reduce the flank and machined surface friction, the latter should choose bigger angle, after taking angle = 7 ° ~ 9 °. Face milling cutter body from the posterior horn is designed after the installation angle and blade angle formation of the post, after the blade angle series 0 ° ~ 25 °, taking into account the intensity and the installation of blade angle limits, select the blade angle after = 11 °.
Face milling cutter with the main angle 45 ° ~ 90 ° Several. Main effects of different cutting force angle direction and the actual ablation depth. In addition, the face milling cutter main angle is different, the wiper blade until it has not the same, in the produce in the manipulators do not understand or do not pay attention to different main wiper blade angle difference, it can be said in the mixed state. Optimization of primary angle 75 °, and extended to other parts of the whole plant used in the processing, reducing the unfair use of blade damage.
Face milling can be divided into two-front corner by a negative rake angle, double positive rake angle and the positive and negative front face milling cutter. "Seven? Five" period at home and heavy machining industry and tool manufacturer to heavy cutting tool, developed to take axial and radial front double negative rake angle negative side cutters. Actually confirmed that different from the power plant equipment manufacturing heavy castings and forgings heavy machinery manufacturer processing, welding in a large group of components and parts machining applications, "heavy-duty cutting face milling cutter" is a misunderstanding. Double negative rake angle cutting face milling cutter is easy to produce vibration, so that machined surface coarse and heavy degree of difference, loss tool easily collapse. Selected axial, radial front is positive, increasing the rake angle, cutting force can be reduced, reducing the vibration, to achieve high precision and high-speed cutting requirements. After testing, optimization of radial front f = 0 ° ~ 2 °, the axial front p = 9 ° ~ 12 °.
Choice of cutter geometry
Blade clamping methods are before and after the briquette-style, wedge adjustable, eccentric, lever, clamp screw and flexible means of compression. Basic requirement to facilitate clamping, clamping firm, high positioning accuracy, the structure simple and easy chip removal. Face milling cutter blade clamp used briquette-style way of not only the larger capacity chip groove on the blade's precision and low versatility.
Blade clamping means
Face milling cutter blade structure according to the installation can be divided into paperback and established manner of dress. Paperback way from Germany Walter AG (WALTER) early adopters, standing equipment from Germany, Ingersoll (INGERSOLL) launched. Paperback form with a large blade angle before installation to allow for the characteristics of a large grove, established way of a blade mounted compression, impact resistance, suitable for heavy cutting characteristics. With the Harbin Institute of Technology, Harbin Engineering capacity tool factory, cotton factory co-workers have developed tools for machining stainless steel blade cutter paperback blade structural surface.
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