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Universal milling machine processing of long rack

The other side of the rack (Figure 3), must pay attention to: processing of the first tooth, we must find is the location, use calipers or a dial indicator tooth alignment. The pull is vertical milling head, with the cutter portion of the convex tooth milling tip off,[link widoczny dla zalogowanych], to complete the profile process (Figure 4) to improve efficiency, according to rack situation. Can simultaneously process several pieces, in order to reduce the time to adjust alignment. 5 Select the tool (Figure 6) (1) rack parameter calculation pitch P: l_l No. 3193 dedendum, = m (h + c) full tooth height h = m (2h. Ten c) h for the tooth height factor, c for the top gap coefficient. (2) Tooth width b = EF for a 2BD = nm/2-2m (h. + C) tg = m A 4 (h + c) tgd / 2 in the triangle AP, C in: H / sinEABC = b / sinz / ACB ACB = 9 because of a 2a, ABC = 9 + d so = bsin (9 +) / sin (9 a 2a) = hcosa/cos2a = mcosa [a 4 (h. + c) tga] / (2eos2a) as Milling cutter disc thickness or diameter, to the maximum, as much as possible large. b, cutting convex tooth root tip cutter diameter, the maximum, as much as possible large. Figure 6 (3) disc cutter diameter Cottage> D +2 hcosa = D +2 m (2h + c) c0s as disk cutter or saw blade cutter diameter, the minimum value. In ensuring the milling depth and arbor do not touch the workpiece under the premise of the small value of as much as possible. D, positioning sleeve arbor on the cutter diameter. In short, the selection tool when the cutter disc cutter or saw blade diameter and thickness as a large selection can ensure the tool rigidity and cutting, so as to enhance the teaching work. 6 Conclusions processing rack using this method, although the precision by the machine precision, the operation of influential, but less precision rack processing,[link widoczny dla zalogowanych], after all, a convenient way to not only expand the scope of the processing machine, to play its potential,[link widoczny dla zalogowanych], but also save the equipment investment, reducing the processing cost, with satisfactory results. Received Time: 2002 A Ol-10 (Continued from page 149) ① inductosyn feet properly installed, the operating REF. Z-axis z to return to zero; been measured with a standard submit (we use the circular device),[link widoczny dla zalogowanych], the pressure against the end of the rotary table positioning and installation of machine tools equipped with the zero on the axis, the alignment review a; Figure 3. Circular device = 59.9695mm, z-axis corresponds to the reading for the 690.0305nun, that is a reset point away from the z-axis 690. o305mm at the zero reading on a number of tools is zero error, this error as the coordinates of the variable input parameters of machine 84. ② the original 84 parameters for 714, adjust the schematic diagram 3Z axis part of their unit O. 5. In order to avoid input offset adjustment in the parameter data is too large, foot in the installation for synchronization to the attention of the error is not zero deviation is too large. Thus, according to the requirements and methods, we first adjusted to 760 to 84 parameters. ③ measured 6 times, z axis: a 689.967; a 689.970; a 689.968; a 689.970; a 698.969; a 689.971. Mean difference was calculated to take O. 06nun, so the parameters need to fill in the 84 # 120, about 84 parameters adjusted to 880. Test-retest 6, z-axis: a 690. O32; a 690.031: a 690.030; a 690.029: a 690.0304-690.031. Shows the group data, has been basically meet the requirement, thus zero recovery is complete. (3) Note ① After these adjustments, cleaning, install shields and machine inductosyn guard rails, and painted in the protective plastic shroud at the connection to prevent the infiltration of iron and impurities determined sliding scale Q . ② able to do so, after the above adjustments, the laser interferometer can be used on the z-axis pitch error compensation. 3 Conclusion this method can reduce the installation and adjustment is too large, asked to improve maintenance efficiency, ensure that the installation accuracy, and ensure inductosyn life. After six months of use,[link widoczny dla zalogowanych], the machine is stable, precision fully meet the requirements. Proved, the adjustment method is effective, with a table management, practical features, but also for other CNC machine tools to adjust the installation position feedback devices provide a useful reference. References l】【2】【manual machine tools FANUC 6M system for a manual 【3: Bi Chengen and so on. Modern CNC machine tools (the book). Beijing: China Machine Press. 1991 About the author: Mi Fang Wei, engineers, Box 919-608, Mianyang, Sichuan, 621900, Tel: (0816) 2488674 Received Time :2001-09 a i9

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