Abstract:
Sistema de compensación de la calda del carnero en una máquina herramienta, comprendiendo un carro (1) de 5 traslación vertical, en el que se incorpora el carnero de aplicación, disponiéndose sobre dicho carro (1) al menos una y preferentemente dos placas (2) orificadas, sobre cada una de las cuales se incorpora un patín (3) fijo y unos patines (4) móviles, los cuales se 0 relacionan con una guia de desplazamiento transversal del carnero, de manera que mediante el flexado controlado de las placas (2) se compensa la calda del carnero.
Abstract:
The invention concerns a device for using a parallel structure (S) designed for positioning and displacing a mobile member (100) comprising at least a fixed element, at least a mobile member (100) and at least three actuators (200) each including a fixed part (210) and a mobile part (220), the mobile member (100) consisting of a support-sheath (110) of a tool spindle (111). Said device is characterised in that the parallel structure (S) is arranged such that the spindle (111) axis is horizontal. For this purpose, it comprises balancing means (M) which, enabling said support-sheath (110) to move in rectilinear manner along axes X, Y and Z, maintains the assembly consisting of the support-sheath (110), the spindle (111) and the tool such that the weight of the latter is not transferred on said parallel structure (S). The invention is useful for high-speed machining for machining operations including drilling, counter sinking, tapping or boring.
Abstract:
The invention concerns a device for using a parallel structure (S) designed for positioning and displacing a mobile member (100) comprising at least a fixed element, at least a mobile member (100) and at least three actuators (200) each including a fixed part (210) and a mobile part (220), the mobile member (100) consisting of a support-sheath (110) of a tool spindle (111). Said device is characterised in that the parallel structure (S) is arranged such that the spindle (111) axis is horizontal. For this purpose, it comprises balancing means (M) which, enabling said support-sheath (110) to move in rectilinear manner along axes X, Y and Z, maintains the assembly consisting of the support-sheath (110), the spindle (111) and the tool such that the weight of the latter is not transferred on said parallel structure (S). The invention is useful for high-speed machining for machining operations including drilling, counter sinking, tapping or boring.
Abstract:
A machine tool (1) comprising a vertical upright (4), a translatable support structure (6,54) supported by the upright (4) and bearing a spindle (8,58) and an extensible balancing device (30) which acts so as to push against the support, structure to counter the effect of the weight of said support structure and of the components supported thereby.
Abstract:
The invention is directed to solving a problem of inclination of a cross rail involved in movements of a spindlehead on the cross rail in a double column-type machine tool, in which the cross rail moves up and down, and degradation of accuracy caused thereby to facilitate up and down movements. Measures for solving the problem comprises detecting a position of a shaft end surface of a screw shaft for vertical movement of the cross rail on a side opposite to a load, comparing a reference value at the time when the spindlehead is at a central position of the cross rail, with a value of a displacement of the screw shaft at the time when the spindlehead is moved, to determine a correction value, and controlling drive means for the screw shaft on the basis of the correction value to correct the displacement for prevention of inclination of the cross rail. Further, in order to prevent a slide unit from dropping in an abnormal state, in the case where energization of a servomotor is shut off, in a machine tool, in which a command from a control device causes a feed screw having no self-locking function to move the slide unit or the like up and down, there are provided means separate from a position detector on a side of the control device and for detecting rotation of the screw shaft, and means for stopping movements of an object being fed, such as the slide unit, so that when a detection value detected by the detecting means exceeds a specified value, the stopping means is actuated to prevent dropping of the object being fed.
Abstract:
A counterbalance and drive system for a machine slide mechanism comprising: a machine mount supporting a vertically displaceable slide mechanism (16) and a counterweight (30); a counterbalance system including a first flexible connector (48) suspended from the machine mount and interconnecting the slide mechanism (16) and the counterweight (30) so that a gravitational force acting on the slide mechanism is at least partially opposed by a gravitational force acting on the counterweight; a drive system including a second flexible connector (58) suspended from the machine mount and interconnecting the slide mechanism and the counterweight, the drive system including: a drive motor (42) operatively engaged along a length of the second flexible connector for vertically displacing the slide mechanism; and a compliant connector (46) operating within a limited range of compliance imparts a regulated amount of tension along at least a portion of the length of the second flexible connector between the engagement of the drive motor and the counterweight.
Abstract:
A burrless, flexible track drilling system employing a counterweight tool balancing subsystem. The counterweight tool balancing subsystem provides essentially a "weightless" feel to a machining subassembly of the system that carries a drill and an electromagnet. This enables an operator to move the machining subassembly vertically with only a very minimal degree of effort being required. The machining subassembly also includes a plurality of lifting subassemblies that aid the user in lifting and lowering the electromagnet away from and toward a pair of panels on which a drilling operation is being performed. This also significantly reduces operator fatigue and contributes to a highly ergonomic system.
Abstract:
For movably mounting a measuring probe on a co-ordinate measuring machine, a carriage (18) has an electric motor (22) which, by means of rollers (24), provides a friction drive relation with a traction bar (16). The carriage (18) is connected by way of a wire rope (26) with a counterbalance deadweight (32). The latter has connected thereto an electric motor (36) providing a drive relation by means of a pair of rollers (38) with one of a pair of guide bars (34). The total mass of the motor arrangement is thereby split, with one arrangement compensating for the other and the power requirement is halved because the two motors share the total load. This provides for many operating advantages.