product news/產品新聞
Semi-Automatic Band Saw for Heavy-Duty Production 用于高强度生产的半自动带锯
Te Model KS450 semi-automatic band saw from
Kalamazoo Machine Tool, Portage, Mich., is designed for heavy-duty production sawing. Te frame is canted five degrees to easily cut through the bottom of a structural section without vibration or a reduction in sawing rate. Te saw has a variable speed blade from 60 to 360 ft./min. and is capable of sawing solids and structural shapes up to 14 in. at 90 degrees in full cycle, semi-automatic operation. It also can double miter 60 degrees to the left or right. Te Model KS450 features massive components for
vibration-free production cutting, fully hydraulic operation and a free-standing operator console. When the operator pushes a single button, the saw frame automatically senses the material size. Te saw frame makes the cut at the pre-set rate, then returns automatically to clear the workpiece.
美国密歇根州的波蒂齐的卡拉马祖机床公司生产的 KS450型半自动带锯设计用于高强度生产的锯切。为了 切穿型材截面的底部，此带锯框架倾斜5°，这样在锯切 时不会出现震动或降低锯速。带锯锯片的速度可变，从 18.3—109.7米/分。可全过程以90度的角度半自动化操 作，用于0.36米的固体和结构型材切割。它还能左右两 侧双向60度调节。
KS450型适用于无震动的大型产品的切割，完全液压 操作并有一个自立的操作员工作台。当操作员推动一个 按键时，这个带锯框架自动识别材料的尺寸。带锯按照 预设的速度锯切，然后自动对工件进行清除处理。
Bigger is Better for Steel Gear Casting 钢齿轮铸件，越大越好
When global mining supplier Metso Corp., Helsinki,
Finland, was in the market for large-scale gears for its op- eration in Los Bronsis, Chile, only a handful of metalcast- ers were capable of producing the necessary components. Metso placed an order for a 44.3-ft. ring gear for use in a semi-autogenous grinding (SAG) mill to crush rocks during the extraction process for gold and copper with Rexnord-Falk Mill Products, Milwaukee. Rexnord-Falk has produced more than 5,000 gears
and pinions, with many gears stretching beyond 40 ft. in diameter. While unable to determine the world’s largest gear, Gear Technology Magazine has cited Rexnord-Falk as one of a half-dozen metalcasting fa- cilities capable of producing such a component. For the Metso project, Rexnord-Falk engineers planned for the 8645 steel component to be cast in four sections, which then would be assembled using 3.5 x 22-in. studs to produce the massive ring gear. “To create each gear mold, cores made of chemically
bonded sand are assembled in one of our large pits,” said Paul Ostrenga, foundry operations manager. “Te pit mold setups, which take up to a week to assemble, are poured using one of Rexnord-Falk’s specifically engineered mate- rials providing customers with the necessary hardness and mechanical properties.” Each quarter section had a pour weight of 143,000 lbs. and cooled in the mold for two weeks before the casting was removed from the sand for further processing. Te four sections underwent upgrading operations before a final heat treatment. Te segments then were moved to Rexnord’s machine shop. “After each segment’s split joints were machined and
当位于芬兰赫尔辛基的全球矿业供应商美卓集团 为其智利Los Bronsis的公司购买大齿轮时，只有极 少数的铸造厂能够生产所需的部件。美卓向美国密尔 沃基的Rexnord-Falk公司订购了一件直径44.3英尺（ 约13.5米）的环形齿轮，用于在提取金和铜的过程中 使用半自磨机以粉碎岩石。 Rexnord-Falk已经生产了超过5000件齿轮和齿 轴，许多齿轮直径超过40英尺（约12米）。虽然不 能确认是否是世界上最大的齿轮，《齿轮技术》杂志 曾指出Rexnord-Falk公司是为数几家能生产此类产品 的厂家之一。对于美卓的项目，Rexnord-Falk的工 程师计划采用牌号是8645钢的材质分4块分体铸造成 型，用3.5x22英寸的螺栓装配成为巨大的环形齿轮。 “为了制造每个齿轮砂型，化学粘结剂制成的砂 芯在我们的一个大型地坑中装配”，铸造厂经理Paul Ostrenga说：“地坑砂型的装配需要花费一周，砂 型的浇注使用的是Rexnord-Falk特制的一种工程材 料，满足客户必要的硬度和力学性能要求。” 齿轮的每1/4部分浇注钢水量达143000磅（约 64.9吨），当铸件落砂进行后续工序时已在铸型中冷 却2周。这4部分在最终热处理前将进行升级操作，之 后将被运送到Rexnord的机加工车间。 “在每段的分体接头机加工并钻孔以使每段装配
June 2014
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 73
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