摘要:
A servo controller capable of preventing downward displacement of a gravitating axis of a machine when an excitation of a servomotor for driving the gravitating axis is discontinued. When a shutdown command is issued, a command for shifting a position of the gravitating axis by an offset amount in a direction opposing the gravitation is issued to a servo system. Also, a command for operating a mechanical brake to apply a braking force on the gravitating axis is issued. After a predetermined time period, the excitation of the servomotor is discontinued. The position of the gravitating axis is shifted upward by the offset amount within a time-lag between an issuance of the mechanical brake operating command and actual application of the braking force by the mechanical brake, and the braking force is applied to the gravitating axis at the shifted position. When the excitation of the servomotor is discontinued, the downward displacement of the position of the gravitating axis due to a backlash of the mechanical brake is compensated by the upward shifting of the gravitating axis, thereby movable elements connected to the gravitating axis is prevented from collision or interference with peripheral objects.
摘要:
A general safe retract and return function is provided for a machine tool which is easily programmed for all cases to avoid collision and interference between the workpiece and tool and to reduce the damage or imperfection in the surface of the machined workpiece caused by the termination and/or resumption of machining. The general safe retract and return function includes parameters defining incremental retract and entry vectors relative to the direction of the machining path in the region of the interrupted point. Preferably the tool and workpiece are reengaged at the interrupted point along an entry ventor which is at a grazing angle with respect to the reverse of the tool feed direction along the machining path, thereby avoiding remachining of the workpieces but providing a smooth surface finish. Preferably the general safe retract and return function interprets programmer specified conditional expressions to determine when logical jumps should be performed to disengage the tool and workpiece and execute respective user-defined interrupt subroutines for corrective action. Preferably the logical jump for certain limit conditions or trigger signals is conditional based upon the engagement and disengagement of the tool and workpiece as specified by rapid traverse and feed rate moves, beginning and ending distances for the feed rate moves, and the depth of cut at the beginning and ending points of the feed rate moves.
摘要:
The present disclosure includes a motion control system for a machine tool system configured to shape a part with a tool, including an I/O module with machine configuration information that defines limits of a three-dimensional working space of the machine tool system. The I/O module further includes a part program that specifies first and second positions of the tool without reference to the working space limits. The motion control system further includes a software controller configured to internally process moves to determine whether the tool can be repositioned from the first position to the second position while maintaining the tool above a minimum clearance from the part and within the working space limits, output the internally processed moves to the machine tool system to cause movement of the tool if the tool can be safely repositioned, and output an error if the tool cannot be safely repositioned.
摘要翻译:本公开包括用于机床系统的运动控制系统,该机床系统被配置成用工具对部件成形,包括具有定义机床系统的三维工作空间限制的机器配置信息的I / O模块。 I / O模块还包括一个部件程序,它指定工具的第一和第二位置,而不参考工作空间限制。 运动控制系统还包括软件控制器,该软件控制器被配置为内部处理移动以确定工具是否可以从第一位置重新定位到第二位置,同时将工具保持在与零件之间的最小间隙以及工作空间限制之内,输出 如果工具可以安全地重新定位,则内部处理移动到机床系统以引起工具的移动,并且如果工具不能安全地重新定位,则输出错误。
摘要:
An automatic grinding apparatus includes a constant rotating grinder (24) having a motor (25) in which a load current increases or decreases due to the metal removal rate per unit hour, a travelling device for moving the grinder three-dimensionally along the grinding surface, a sliding device (20) for adjusting the distance between the grinder and an object (50, 51) to be found and a controller for controlling the sliding device to allow the load current of the grinding motor to be constant. An articulated robot or a cartesian coordinate robot is used for the travelling device. The automatic grinding apparatus starts the grinding motor at first, halting the travelling device at the initiation of grinding, permitting the grinder to approach the object to be ground after a time interval and starting the travelling device simultaneously or a little later after detecting that the grinding disk (26) contacts the object to be ground, due to the variation of the load current of the grinding motor. The apparatus restores respective relative positions of the grinder and the sliding device (20) to a certain position by regulating the operation time of an elevation motor (21) of the sliding device or by directly detecting the location of the slider of the sliding device before and after the grinding process. The automatic grinding apparatus is used for grinding a workpiece (50) such as for finishing welded metal and deburring or chamfering the work piece.
摘要:
The invention is directed to a method for automatically generating travel paths to the next geometric elements to be measured when there is a collision of the probe 25 or the probe head 10, for example, with the workpiece 22. The method utilizes safety-reference surfaces (S1 to S5) placed in the form of an enclosing parallelepiped about the workpiece 22. The shortest collision-free connecting paths (P1-P2-P3) from one geometric element to the next are computed on these safety-reference surfaces.
摘要:
The present invention relates to a method for machining a blank (10) by means of a tool (12) for producing a finished part, wherein the tool (12) is moved during the machining on a guide path (14) comprising at least three successive path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′) in the form of two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) and one connecting segment (18; 18-1; 18-2; 18′), which connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) to one another, and wherein the connecting segment (18; 18-1; 18-2; 18′) of the path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′), which connecting segment connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2), is determined in terms of its shape by the forward feed (F1) of the tool (12) at the end (24) of the first machining segment (16) and by the forward feed (F2) of the tool (12) at the start (30) of the second machining segment (20).
摘要:
The present invention relates to a method for machining a blank (10) by means of a tool (12) for producing a finished part, wherein the tool (12) is moved during the machining on a guide path (14) comprising at least three successive path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′) in the form of two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) and one connecting segment (18; 18-1; 18-2; 18′), which connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) to one another, and wherein the connecting segment (18; 18-1; 18-2; 18′) of the path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′), which connecting segment connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2), is determined in terms of its shape by the forward feed (F1) of the tool (12) at the end (24) of the first machining segment (16) and by the forward feed (F2) of the tool (12) at the start (30) of the second machining segment (20).
摘要:
By implementing a sequence control in a numerical control, tool-related machining operations and position elements are executed depending on the technology-dependent sequence in the machining program so that all cycles of a machining operation are selected consecutively as modal cycles, with all cycles being selected consecutively for a position element for each cycle for a machining operation, and the respective operation being executed at the position of the respective position element prior to the following cycle being selected as a modal cycle for an operation. Thus unnecessary tool changes are avoided and therefore machining productivity is increased.
摘要:
A method for controlling punch strokes of a punch press machine includes the step of performing a first punching operation with a punching tool wherein a sheet of material is in a first preselected position. A second punching operation is then initiated with the punching tool at a variable hover height before the sheet of material reaches a second preselected position. The variable hover height of the punching tool is determined by the distance between the first and second punching operations. If the sheet reaches a predetermined in-position zone before the punching tool reaches maximum hover height, the ram changes direction moving downward. The punch reaches the material just prior to the work piece coming to a stop thereupon performing the next punching operation.