SU931373A1 - Apparatus for compensating crosspiece deformation - Google Patents

Description

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The invention relates to a machine tool industry, in particular, to heavy machines, in which the bending and torsion of the cross member from its own weight and the weight of the nodes moving along it reach significant values.

The bending and torsion of the cross member leads to an indirect movement of the tool. Known methods and devices that compensate for bending or torsion of the cross member.

A device is known for unloading the machine cross-guides using a special carrier beam mounted on the cross-bar at its junction with the stand. On each caliper there is a roller pressed to the beam by a spring and through a system of levers so that the force on the roller when the caliper moves remains constant regardless of the amount of deflection of the beam. This design provides accurate simultaneous and alternate movement of supposes.

However, this only compensates for the bending of the cross member from the weight of the calipers, and the torsional deformations that vary with the horizontal movement of the calipers and the deformations from the weight of the transverse itself are not compensated.

It is also known to have a coffering test ruler that moves with the crossbar and against which the deflection of the cross member is measured. The deflection is compensated for by the tension of the cable on the blocks fixed next to the measuring device. The tension is driven by the engine.

The main disadvantage of the known device is the complexity of the tension device. It must maintain constant tension when moving the cross member.

Claims (2)

The purpose of the invention is to simplify the design. This goal is achieved by the fact that the cable is tensioned by a hydraulic cylinder, the cable passing through the blocks located in the lower part of the rack, on the crossbar and in the middle part of the cross member. It is advisable that the test ruler be mounted on supports, one of which is designed to move along the cross member and the other is hinged. Also, the hydrocylinder needs to be fixed at the end of the crossmember. The drawing shows a machine with a device to compensate for the deformation of the cross member. The device consists of a hydraulic cylinder 1, the body of which is fixed on the crossbar 2, the cable 3 passing through the blocks C and connected to the middle of the cross member 2, along which the caliper 5 moves. The cross member formation is measured by the sensor 6, which detects the bow of the cross member 2 relative to the check ruler 7, pivotally mounted on the crossbar at the points of its junction with the uprights 8, When the caliper 5 is at station 8, the tension of the cable 3 carried out by the hydraulic cylinder 1 is chosen so that the cross member is parallel to the check ruler 7. When moving the supports 3, as well as deflecting the cross member from the force, we take the distance ruler and cross bar; which is measured by sensor 6 According to the signal from sensor 6, the pressure in the cavity of hydraulic cylinder 1 is redistributed (redistribution can be done, for example, with the help of a distribution zolotmik, which can also be used as a sensor) so that the tension will compensate for the deformations . When the cross member moves, the tension force of the cable remains as the cable length does not change. The development of the proposed device increases the straightness of the movement of the calipers by simultaneously compensating for the bending deformations and the torsion of the cross member from its own weight, the weight of the calipers and cutting forces, and also simplifies the design of the compensation device. Claim 1. A device for compensating the deformation of a cross-member, vertically moved on racks connected by a crossbar, containing a check-bar mounted on the cross-member, a cross-member deformation sensor and a cable fixed to the cross-member and connected to a drive, the force of which is controlled by the cross-member deformation sensor, characterized in that, for the purpose of upbringing the structure, the drive is made in the form of a hydraulic cylinder fixed on the cross-bar, the rod of which is connected to the cable passing through the block at the base Rack ,, blocks on the crossbar and fixed to the middle of the cross member. 2. Device POP.1, characterized in that the test line is installed on supports, one of which is made with the ability to move along the cross member, and the other is hinged. 3. The device according to claim 1, so that the cylinder is fixed at the end of the cross member. Sources of information taken into account during the examination 1. Machines 4 tools, No. 5. 1977, p. 7, fig. ke, 2. Patent of Great Britain М °, cl. VZ (3), pub. 1961.