SU1571443A1 - Device for testing machines of percussive action - Google Patents

Abstract

This invention relates to a technique for measuring impact force. The purpose of the invention is to improve the accuracy of measuring the electrical parameters of percussion machines. When the tested machine 13 is turned on, its single impact through the working tool 12, the body of the power piston 4 and the oil column is transmitted to the pulse pressure sensor 14 and is sensed by its elastic membrane. The resulting electrical signal is recorded by the recorder 15. A cavity is formed in the hydraulic cylinder containing a hydraulic 5 and pneumatic 6 chambers. These chambers are separated by a plunger 7. Under the effect of the pressure that has arisen, the fluid is forced through the throttle hole 8 into the hydraulic chamber 5, increasing its volume and reducing the volume of the pneumatic chamber 6, the power piston goes into the cylinder body. In this case, a significant part of the energy of the shock pulse is absorbed, which is converted into heat absorbed by the water jacket 16. 1 Il.

Description

This invention relates to a technique for measuring impact force.

The purpose of the invention is to improve the accuracy of measuring the energy parameters of percussion machines, including chipping hammers, having wide application in industry.

A device for testing percussion machines is shown in the drawing.

It comprises a base 1 with an anvil 2 in which a hydraulic cylinder 3 is fixed. A hydraulic piston 4 is inserted into the hydraulic cylinder, inside which a cavity is formed containing two chambers: hydraulic 5 and pneumatic 6 separated by plunger 7. Chamber 5 communicates through cavity 9 cylinder, and the pneumatic chamber through the nozzle 10 communicates with the external network of compressed air. The power piston has a recess 11, into which the working tool 12 of the test machine 13 is inserted. At the bottom of the hydraulic cylinder, an electrical sensor 14 of pulsed pulse pressure is installed, connected to the recorder 15 of the energy parameters of hand-held percussion machines. The cylinder body for cooling is surrounded by a water jacket 16.

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The device works as follows.

The test unit RUM 13 is switched on, its single impact through the working tool 12, the body 4 of the power piston and the oil column in the hydraulic cylinder is transmitted to the sensor 14 of the impulse pressure cue and is sensed by its elastic membrane. The resulting electrical signal is recorded by the recorder 15.

Under the action of the pressure that has arisen in the liquid, it is forced through the throttle hole 8 into the hydraulic chamber 5, increasing its volume and reducing the volume of the pneumatic chamber 6, the power piston goes into the cylinder body. At the same time, a significant part of the shock pulse energy is absorbed; Under the influence of pressure in the pneumatic chamber 6, the junjer 7 squeezes the fluid through the throttle hole 8 from the hydraulic chamber 5 into the cavity 9 of the hydraulic cylinder, the power piston 4 rises to its original position, and the excess Energy turns into PLO. The pressure developed in the cavity 9 when the pneumatic chamber 6 is discharged is recorded by the Sensor 14 and the recorder 15.

By changing the initial air pressure in the external network, which communicates through the fitting with the pneumatic chamber, it is possible to change the elastic-plastic characteristic of the impedance of the proposed energy absorber by selecting it in accordance with the parameters of the real objects being processed.

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Claims (1)

Invention Formula A device for testing impact machines 5, comprising a housing inside which a hydraulic cylinder with a cavity, a power piston, a pulse pulse pressure sensor and an energy absorber, and a Q recorder connected to a pulse pulse pressure sensor, are characterized in that, in order to improve the accuracy measurement by creating a small inertia of 5, the energy absorber is made in the form of a cavity with hydraulic and pneumatic chambers separated by a plunger located inside the power piston, hydraulic chamber associated with the cavity by means of hydraulic cylinders symmetrically constructed throttle openings disposed on the housing axis, and the pneumatic chamber communicates via the connection to the external network 5 ozduha compressed. 0 13 10 Compressed  Air sixteen Water Water Compiled by I. Malginova Editor A, Dolynich Tehred M. DidykKorrektor S.Shevkun Order 1505 Circulation 474 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Subscription