SU917013A1

SU917013A1 - Device for measuring cutting force

Info

Publication number: SU917013A1
Application number: SU802970779A
Authority: SU
Inventors: Валерий Константинович Кукушкин; Алексей Филиппович Сафонов
Original assignee: Украинский Научно-Исследовательский Институт Орошаемого Садоводства
Priority date: 1980-08-08
Filing date: 1980-08-08
Publication date: 1982-03-30

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ УСИЛИЙ РЕЗАНИЯ(54) DEVICE FOR MEASURING CUTTING EFFORTS

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Изобретение относитс к силоизмерительной технике и может быть использовано дл измерени горизонтальной и вертикальной сое та вл кицих .усили резани и дл определени абсолютного угла йаправлени силы резани .The invention relates to load-measuring equipment and can be used to measure horizontal and vertical connections and forces to cut and to determine the absolute angle and direction of the cutting force.

Известно устройство дл измерени усилий резани , содержащее корпус с режущей кромкой, выполненной в виде промежуточного пр мого рычага, один конец которого цгарнирно соединен с режущей кромкой , а другой св зан с ней посредством дополнительного силоизмерительного прибора 1.A device for measuring cutting forces is known, comprising a housing with a cutting edge made in the form of an intermediate straight lever, one end of which is connected to the cutting edge and the other is connected to it by means of an additional force-measuring device 1.

Однако это устройство не обеспечивает требуемую точность измерени независимо от угла приложени результирующей силы.However, this device does not provide the required measurement accuracy regardless of the angle of application of the resulting force.

Наиболее близким к предлагаемому по технической сущности вл етс устройство дл измерени усилий резани , например,грунтов, содержащее раму с направл ющими, по которым перемещаетс каретка, св занна через шарнирно-соединенные двуплечий и промежуточный рычаги, силоизмерители касательной и нормальной составл ющих усили резани , угломерThe closest to the proposed technical entity is a device for measuring cutting forces, for example, soil, containing a frame with guides along which the carriage connected through hinged-connected double shoulders and intermediate levers, tangential load force force meters, protractor

и держатель с режущим инструментом 2 .and holder with cutting tool 2.

Недостатком известного устройства вл етс то, что оно не позвол ет измерить абсолютные величины составл ющих усили резани и угол действи результирующей силы резани , так как конструктивно устройство выполнено таким образом, что при воз10 действии на резец, например., только вертикальной составл ющей усили резани , все силоизмерители воспринимают и фиксируют ее. Кроме того, в известном устройстве,свыше дес ти A disadvantage of the known device is that it does not allow measuring the absolute values of the component cutting forces and the angle of the resultant cutting force, since the device is structurally designed so that when exposed to the cutter, for example, only the vertical component cutting force , all force meters perceive and fix it. In addition, in the known device, more than ten

15 шарнирных соединений, незначительный люфт которых в сумме дает большую погрешность и неточность измерений .15 articulated joints, the insignificant backlash of which in total gives greater error and inaccuracy of measurements.

Цель изобретени - повышение точ20 ности измерени путем получени истинных абсолютных значений составл ющих силы резани независимо от угла скольжени резани , а также упрощение конструкции.The purpose of the invention is to improve the accuracy of measurement by obtaining the true absolute values of the components of the cutting force regardless of the slip angle of the cutting, as well as simplifying the design.

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Указанна цель достигаетс тем, что устройство снабжено дополнительным двуплечим рычагом, шарнирно-закрепленным на каретке, одно плечо которого опираетс на регулировочный This goal is achieved by the fact that the device is equipped with an additional two-arm lever, hinged to the carriage, one arm of which rests on the adjusting

Claims

30 screw, and the other is spring-loaded, the additional lever is provided with a stop interacting with the force meter of the vertical component of the cutting force fixed rigidly on the carriage, and the intermediate two-arm lever is spring-loaded and equipped with the stop of the horizontal force of the cutting force fixed on the frame The drawing shows a diagram of the proposed device. The device comprises a frame 1 with guides 2, a carriage 3, intermediate single-shoulders 4 and two shoulders 5 chaga, an additional double-arm lever 6 with an emphasis 7, a screw 8 and a spring 9, an emphasis 10, load cells 11 and 12, a spring 13, a holder 14 a cutting tool 15 with a carbon meter 16 and a drive mechanism (not shown). The device works as follows. Test specimen 17 is mounted on a double-shouldered lever b. The cutting tool 15 with the goniometer 16 is mounted on the holder 14 to the required cutting parameter — the slip angle. With the help of the drive, the holder 1 receives a rotational motion and the cutting tool 15 cuts the sample 17. The force P acting on the sample in the form of horizontal Pf and vertical Pg components is perceived by a system of levers and force measuring 11 and 12. At that, measuring 11 only the vertical component P is the cutting force, and the load cell 12 is the horizontal component Pp of the cutting force. The readings of the force meters are recorded, for example, with an oscilloscope (not shown) as separate lines with ordinates, respectively, Hx and Nu. The proposed cutting measurement device allows quick and accurate calculation of the absolute values of the components of the cutting forces and the inclination angle of the resulting force. The use of the device makes it possible to develop optimal designs of the working bodies of the fruit grafting machine and contour cutter of fruit plantations. Claims An apparatus for measuring cutting forces, for example, branches of fruit crops, comprising a frame on which a holder for a cutting tool with a goniometer is placed, guides on which a carriage connected to a pivotally-jointed and double-arm levers and strength measures horizontal is mounted and vertical component cutting forces, such as, in order to increase the measurement accuracy by obtaining the true absolute values of the component cutting forces regardless of the slip angle In order to cut, as well as simplify the design, the device is equipped with an additional two-arm lever hinged on a carriage, one shoulder of which rests on an adjusting screw and the other is spring-loaded, and the additional lever is provided with a stop that interacts with the load cell of the vertical component of the cutting force fixed on the carriage rigidly and the intermediate double-arm lever is pschpruzhaynaya and is equipped with a stop that interacts with the siltimeter of the horizontal component of the cutting force attached to the frame gesture about. Sources of information taken into account during the examination 1. USSR author's certificate ft 386074, cl. G 01 i 1/00, 1973.

2. USSR author's certificate No. 553493, cl. G 01 L 5 / 16,1977 (prototype).

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