SU837598A1 - Apparatus for measuring torque - Google Patents

Description

one

The invention relates to devices that serve to control and measure the load; ia tool in automatic control systems on aggregate drilling machines, automatic drilling machines for deep drilling and automatic Xl lines to increase their reliability.

The use of sensors that use deformation of elastic elements installed between the spindle and the tool leads to a weakening of the rigidity of the spindle assembly, complication of its design and reduces the reliability of the machine. Most of these torque sensors cannot be used in multi-spindle aggregate heads due to their design features (complexity, bulkiness of sensors, small center distance between spindles). These drawbacks are eliminated in devices that have active torque control units that measure the load on the tool at any time during machining without weakening the rigidity of the spindle assemblies with the least complexity of the design.

A planetary torque sensor is known, in which the driving element (shaft) is provided with a driver and trunnions, on which gear-wheels are mounted with bearings. The latter are in engagement with a gear wheel rigidly fixed on the driven element (output shaft) and the supporting element.

0 A support element, made in the form of a sun gear with teeth of external and internal gears, can rotate about its axis and interact with a spring-loaded rod with a spring. The spring is set to a predetermined amount of force RD. When the driving element of the satellite gears grows, running around the internal gear ring of the support element, which is kept from turning the spring-loaded rail, the torque element is transmitted to the driven element. If effort

5 applied to the support element from the side of the driving element will exceed the amount the spring is adjusted to, the driving element with the driver rotates relative to the driven element by a certain angle. At the same time gears, running around gear; the driven element, will cause the angular displacement of the support element. The latter will move the rail, which, in turn, deforms and transmits a new, greater force to the support element. The sensor is adjusted to the initial moment value MQ, the value of which depends on the diameter of the drill to be protected, by adjusting the spring accordingly. This sensor is a set of two transducers placed directly on the control object (spindle assembly), which takes a torque and converts it into an angular movement of the support element, and an intermediate one that converts the specified angular movement into a linear movement of the rail 1.

The disadvantages of this sensor are the complexity of the design, the impossibility of using such a sensor in multi-spindle power heads with a limited inter-center distance.

The purpose of the invention is to develop a simple and reliable torque sensor design for multi-spindle golves.

The goal is achieved by the fact that in a device for measuring torque on an aggregate machine containing an elastic sensitive element, a secondary transducer transducer gear including driving, intermediate and driven gears, the elastic sensitive element is made of a movable part, on which an intermediate gear is mounted, and a fixed part, mounted on the gearbox together with the secondary transducer, the measuring tip of which is in contact with the moving part of the elastic sensitive element cop.

FIG. 1 shows schematically a device for measuring torque, a general view; in fig. 2 the use of an intermediate gear on the moving part of the elastic sensitive element; in fig. Figures 3 and 4 of the measurement circuit with different placement of gears in the gearbox of the aggregate head for one spindle.

The device consists of an elastic sensing element 1, on the movable part of which, with the help of the axle 2 and the bearings, an intermediate gear 3 is fixed, which is in engagement with the driving gear 4 and with the driven gear 5 (spindle of the power head). In the fixed part of the elastic sensing element 1, mounted on the gearbox housing, a second transducer is installed - sensor b, the measuring tip of which is in contact with the moving part of the elastic sensitive element 1

The device works as follows.

When changing the torque, Mree on the spindle of the power head and, consequently, on the driven gear 5, the reaction forces P on the intermediate gear at the contact points change proportionally with the driving 4 and driven 5 gears and the total force P 2P on the intermediate gear axis changes accordingly , fixed on the movable part of the sensitive element, which causes a change in the deformation of the movable part of the sensitive element 1 and its displacement relative to the fixed part, which by means of the secondary converter 6 pr It is converted into a corresponding electrical signal proportional to the magnitude of the torque. The force P arising on the teeth x of the intermediate gear 3 at the point of contact with the driving gear 4, and the reaction force from the action of the cutting moment at the point of contact with the driven gear 5 are approximately equal, directed to one side and proportional to the torque (the cutting moment on the tool ).

Claims (1)

1. Copyright certificate. USSR №283783, cl. B 23 B 47/32, 1971. Bajt fuio is noose. fffonr Ki / mo4nai tgvetv n five U / rrvM en fftffonof uttem. fl JP-Cot n Lvn fPui.tt