Abstract:
An indexible cutting insert is given applicability to perform under varying working conditions by giving the corner part a smaller rake angle gamma than the remaining parts of the cutting edge, the rake angle continuously decreasing in the direction of the corner in a transition zone which may extend up to one-third of the total length of the appertaining edge.
Abstract:
In an elongated boring and turning tool that includes an elongated bar and a cutting head, the bar comprises a steel support member and an outer tubular shaft of hard metal, which shaft is composed of a plurality of rings whose inner surfaces make a tight fit on said support member. The inner diameter of the rings is 70-90 percent of their outer diameter.
Abstract:
A drill rod coupling assembly in which each of two rods has at least two spaced sets of threads, the outer of which are coupled by a sleeve so that percussive force is transmitted through the abutting ends of the rods The threads at the end of each rod are designed for surface to surface contact with matching surfaces on a stop in the sleeve. Whenever the outer set of threads is worn or broken they may be cut off and a new end similar to the original end is provided and may be coupled by the sleeve.
Abstract:
A die is secured to a base plate by a resilient yoke which has hooks engaging recesses in the base plate. This mode of fastening permits the die to yield somewhat in the lateral direction and hence promotes automatic adjustment of adjacent knives.
Abstract:
A tool for the fine-turning of grooves in workpieces including a basic body having a rearwardly extending mounting part, and a forwardly projecting bracket. The bracket includes a narrow neck part and an enlarged support part disposed at an end of the neck part. The support part, which forms an insert seat, extends laterally from the neck part wherein the seat is arranged asymmetrically with respect to an imaginary center line of the basic body. A cutting insert includes a bottom side supported on the insert seat. The insert includes two spaced apart convexly arched side cutting edges arranged so that the imaginary center line passes therebetween. A hole is provided through the insert for receiving a fastening screw. The bottom side and the insert seat include mutually engaging stabilizing structures preventing angular displacement of the insert about an axis of the hole.
Abstract:
The present invention relates to a method of depositing a crystalline null-Al2O3-layer onto a cutting tool insert by Chemical Vapor Deposition at a temperature of from about 625 to about 800null C. The method comprises the following steps: depositing a from about 0.1 to about 1.5 nullm layer of TiCxNyOz where xnullynullz>null1 and z>0, preferably z>0.2; treating said layer at 625-1000null C. in a gas mixture containing from about 0.5 to about 3 vol-% O2, preferably as CO2nullH2 or O2nullH2, for a short period of time from about 0.5 to about 4 min, optionally in the presence of from about 0.5 to about 6 vol-% HCl; and depositing said Al2O3-layer by bringing said treated layer into contact with a gas mixture containing from about 2 to about 10 vol-% of AlCl3, from about 16 to about 40 vol-% of CO2, in H2 and 0.8-2 vol-% of a sulphur-containing agent, preferably H2S, at a process pressure of from about 40 to about 300 mbar. The invention also includes a cutting tool insert with a coating including at least one null-Al2O3-layer according to the invention.
Abstract translation:本发明涉及通过化学气相沉积在约625至约800℃的温度下将结晶α-Al 2 O 3层沉积到切削刀片上的方法。该方法包括以下步骤:将约0.1 至约1.5μm的TiC x N y O z层,其中x + y + z> = 1且z> 0,优选z> 0.2; 在包含约0.5至约3体积%O 2,优选作为CO 2 + H 2或O 2 + H 2的气体混合物中在625-1000℃下处理所述层,时间为约0.5至约4分钟, 任选地在约0.5至约6体积%HCl的存在下; 并通过使所述处理层与含有约2至约10体积%的AlCl 3,约16至约40体积%的CO 2,在H 2和0.8-2体积%的CO 2的气体混合物接触来沉积所述Al 2 O 3层, %的含硫试剂,优选H 2 S.在约40至约300毫巴的工艺压力下。 本发明还包括具有包括根据本发明的至少一个α-Al 2 O 3层的涂层的切削工具刀片。
Abstract:
A titanium based carbonitride alloy containing Ti, Nb, W, C, N and Co. The alloy also contains, in addition to Ti, 9-14 at % Co with only impurity levels of Ni and Fe, 1-
Abstract:
A drill for working in metallic materials includes a tool body having located in its front end at least one cutting insert, wherein the tool body is provided with one or several damping elements mounted such that during machining, a relative movement (i.e., sliding and/or deformation) of the tool body and the damping element is allowed to occur.
Abstract:
A mechanism for transferring mechanical energy onboard of a train of carriages of a sorting machine includes a friction wheel fitted onto a carriage. The wheel is rotated by friction caused by the engagement of the wheel against a track on which the carriage travels, and is connected to an electric generator disposed on the carriage. Rotation of the wheel is transmitted to the generator to rotate the generator and produce electricity for operating a belt(s) disposed on the carriage. The force with which the wheel is pressed against the track is automatically changed in response to changes in power requirements of the generator.
Abstract:
The present invention describes a coated substrate material. The coating is formed by one or more layers of refractory compounds of which at least one layer of fine-grained, crystalline gamma-phase alumina, Al2O3, with a grainsize less than 0.1 mum. The Al2O3layer is deposited with a bipolar pulsed DMS technique (Dual Magnetron Sputtering) at substrate temperatures in the range 450° C. to 700° C., preferably 550° C. to 650° C., depending on the particular substrate material. Identification of the gamma-phase alumina is made by X-ray diffraction. Reflexes from the (400) and (440) planes occurring at the 2theta-angles 45.8 and 66.8 degrees when using CuKalpha radiation identify the gamma-phase Al2O3. The alumina layer is also very strongly textured in the [440]-direction. The Al2O3 layer is virtually free of cracks and halogen impurities. Furthermore, the Al2O3 layer gives the cutting edge of the tool an extremely smooth surface finish.
Abstract translation:本发明描述了涂覆的基底材料。 涂层由一层或多层难熔化合物形成,其中至少一层细晶粒结晶γ相氧化铝Al 2 O 3具有小于0.1μm的颗粒。 根据具体的基底材料,在450℃至700℃,优选550℃至650℃的温度范围内,以双极脉冲DMS技术(双重磁控管溅射)沉积Al 2 O 3层。 通过X射线衍射鉴定γ相氧化铝。 当使用CuKalpha辐射时,在2θ角45.8°和66.8°处发生的(400)和(440)平面的反射识别γ相Al 2 O 3。 氧化铝层在[440] - 方向上也非常强烈地纹理化。 Al2O3层实际上没有裂纹和卤素杂质。 此外,Al2O3层使刀具的切削刃具有非常光滑的表面光洁度。