摘要:
Based on an offset direction which indicates whether a laser beam (RB) is offset in a direction to the right side or left side of a travelling direction contained in a motion definition statement, and the direction of a curve at a corner portion (CN) of a laser beam path (b.sub.i,b.sub.i+1), it is determined whether an inner side or outer side of the beam path at the corner is a part (PT). If the inner side of the corner is a part, an NC part program for laser machining is created upon inserting a preset escape path (EP) in the corner portion of the beam path. If the outer side of the corner is a part, an NC part program for laser machining is created in such a manner that similarly set machining conditions prevail in preset machining condition modification intervals.
摘要:
The present invention provides an area cutting method for machining an area (AR) bounded by the curve (OLC) of a predetermined external shape previously using a unidirectional cutting motion. The invention has a step of performing cutting along an i-th cutting path (PT.sub.i), a step, executed after completion of cutting along the cutting path (PT.sub.i), of moving a tool (TL) in a cutting-feed mode along the curve (OLC) of the external shape from a machining end point (Q.sub.i) on the cutting path to a machining end point (Q.sub.i-1) on an (i-1)th cutting path (PT.sub.i-1) previously cut, a step of positioning the tool (TL) from the point (Q.sub.i-1) to a machining starting point (P.sub.i) on the cutting path (PT.sub.i), a step of moving the tool in the cutting-feed mode along the curve of the external shape from the machining starting point (P.sub.i) on the cutting path (PT.sub.i) to a machining starting point (P.sub.i+1) on the next cutting path (PT.sub.i+1), a step of moving the tool in the cutting-feed mode along the cutting path (PT.sub.i+1) to execute cutting along the cutting path (PT.sub.i+1), and a step of repeating these steps to perform area machining.
摘要:
An input data sign determining method in a method of creating NC machining data by entering a direction (.uparw., , .fwdarw., , .dwnarw., , .rarw., ) for each block (b.sub.1 -b.sub.8) of a part profile through use of a profile symbol key thereby to specify the part profile, followed by entering a dimension for each block of the part profile and using these entered data to create the NC machining data, the method having steps of entering, in the form of an incremental quantity along each axis (x, z), a part profile dimension in a predetermined block, discriminating the direction of the part profile in the block, and determining the sign of an entered incremental quantity on the basis of the direction to convert the incremental quantity into a signed incremental quantity.
摘要:
A three-dimensional tool path determination method for determining at least one path out of an approach path along which a tool 11 of a machine tool having three or more controlled axes is made to approach a workpiece, and a retraction path along which the tool 11 is retracted from the workpiece after machining is completed. The three-dimensional tool path determination method includes steps of designating a prescribed tool path pattern from among a plurality of tool path patterns, which prescribed tool path pattern includes an undecided portion (coordinate values of P.sub.1, P.sub.2), entering data specifying the undecided portion of the tool path pattern, which data includes at least a target position (P.sub.e) and a distance (d.sub.1), calculating the undecided portion by using the input data and an arithmetic expression that corresponds to the designated tool path pattern, and creating NC data specifying a three-dimensional tool path by using the obtained coordinate values of the points (P.sub.1, P.sub.2).
摘要:
Disclosed is a data input/output unit which is equipped with a control device (1), a tape puncher (5), a tape reader (4) and a printer (6), and which is capable of operating even in response to a command from a host computer. The printer (6) is provided with a tab set counter (6ca) for setting a number of spaces. A number equivalent to a predetermined number of spaces is added to a print number set in a bit counter (6cc) of the printer (6) and space print data indicative of a prescribed number of spaces is successively set at the beginning of print data for a line to be printed in a print character register (6cg), thereby making it possible to maintain a predetermined space at the left margin on printing paper.
摘要:
There is disclosed a numerically controlled cutting method of cutting a curved surface SF generated by interconnecting corresponding points mi, ni (i=1, 2, . . . ) on two curved lines CV1, CV2 with a cutter BT of a milling machine having simultaneously controlled five axes or a wire electrode of a wire-cut electric discharge cutting machine. According to the numerically controlled cutting method, curve information specifying the two curved lines CV1, CV2, information on tool radius or wire radius, information on the direction of tool or wire compensation, and division information for dividing the curved lines are supplied as inputs. Using the above items of information an offset position at dividing points mi, ni, which are next to dividing points mi-1, ni-1 at which the cutter BT or wire is currently positioned, is determined. The cutter BT or wire is then moved to the offset position to cut the curved surface SF.
摘要:
The first object of the present invention is to provide a derailment prevention guard which can be easily shunted outside the range of the ballast tamping work, the rail grinding work and the rail maintenance work, and has no problem on safety.A derailment prevention guard comprises a guard member installed within a gauge and a support member fixed to a sleeper or a concrete slab track, and the guard member is held by a hold member which can turn around a central axis supported by the support member as turning center between a main rail and the inside of the gauge on the sleeper or the concrete slab track, and the support member is engaged with the hold member by means of a bolt through turning the hold member toward the main rail around the central axis as turning center on the sleeper or the concrete slab track, and the guard member can be shunted inward within the gauge by turning the hold member toward the inside of the gauge around the central axis as turning center on the sleeper or the concrete slab track after loosening the bolt.
摘要:
The first object of the present invention is to provide a derailment prevention guard which can be easily shunted outside the range of the ballast tamping work, the rail grinding work and the rail maintenance work, and has no problem on safety.A derailment prevention guard comprises a guard member installed within a gauge and a support member fixed to a sleeper or a concrete slab track, and the guard member is held by a hold member which can turn around a central axis supported by the support member as turning center between a main rail and the inside of the gauge on the sleeper or the concrete slab track, and the support member is engaged with the hold member by means of a bolt through turning the hold member toward the main rail around the central axis as turning center on the sleeper or the concrete slab track, and the guard member can be shunted inward within the gauge by turning the hold member toward the inside of the gauge around the central axis as turning center on the sleeper or the concrete slab track after loosening the bolt.
摘要:
A pyrolytic boron nirtride double container for a source of molecular beams used in molecular beam epitaxy, wherein the transmissivity of an inner container of the pyrolytic boron nitride double container with respect to light having a wave number of 2600 cm−1 to 6500 cm−1 is 90% or less of that of an outer container. The pyrolytic boron nitride double container, which enables molecular beams to generate stably with good temperature controllability and high heat efficiency and which can be used in a stable manner, is provided through a simple process and at low cost, so that molecular beam epitaxial growth can be stabilized, quality of the epitaxial film can be improved, and even though the rise and drop in the temperature of the material melt is repeated, or even at an emergency suspension of the operation, the trouble due to breakage of the container can be prevented.
摘要:
A heating apparatus having an electrostatic adsorption function comprising at least a supporting substrate, an electrode for electrostatic adsorption and a heating layer formed on the supporting substrate, and an insulating layer formed so as to cover the electrode for electrostatic adsorption and the heating layer, wherein a surface roughness of the insulating layer satisfies Ra≦0.05 μm and Rmax≦0.6 μm, and Vickers hardness of the surface of the insulating layer is 10 GPa or less. Thus, there can be provided a heating apparatus having an electrostatic adsorption function in which scratches are not generated on a silicon wafer or the like and the generation of particles can be suppressed when heating/cooling the wafer or the like.