RU2397856C1 - Cutting force components measurement device - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: device contains a base whereon rigid posts with sensors are mounted, the sensors registering orthogonal projections of cutting force, and a plate for blank fixation. For improved reliability and independence of cutting force components definition the device is equipped with guides mounted ion the posts with rolling resistance assemblies noted for the same freedom degree and a mechanism providing for clamping the plate for blank fixation to the posts. The clamping mechanism may contain a resilient element represented by a spring.

EFFECT: improved reliability and independence of cutting force components definition.

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Description

The invention relates to the field of material processing by cutting and can be used to measure components of the cutting force.

A device is known for measuring components of the cutting force, comprising a housing, a spring-loaded plate with a pad mounted on supports in the housing, moved by a power flow from a processing tool, sensors for recording this power flow (RF patent for utility model No. 77972, G01N 19/02, published 2008.11.10).

However, the disadvantage of this device is the low accuracy of measuring the cutting forces of materials due to imperfections in the design.

The closest in technical essence and the achieved result is a device for measuring the component of the cutting force, including a base on which fixed racks are mounted with sensors that perceive orthogonal projections of the cutting force, a plate for attaching the workpiece (RF patent No. 2028872, B23B 25/06, published 1995.02 .twenty).

However, the device does not allow to obtain reliable independent data on the values of the horizontal and vertical components of the cutting force during the machining of materials and is difficult to design.

The technical problem to be solved by the claimed invention is directed is to increase the reliability and independence of the determination of the components of cutting forces.

This task is achieved by the fact that in the device for determining the component of the cutting force, including a base on which fixed racks are mounted with sensors sensing orthogonal projections of the cutting force, the plate for securing the workpiece, according to the invention, the racks contain additional guides with rolling friction units, with one degree of freedom. In addition, the plate for attaching the workpiece has a clamping mechanism. In addition, the clamping mechanism is made in the form of an elastic element - a spring.

The use of additional guides on racks with rolling friction units with one degree of freedom allows the transmission of the orthogonal components of the power flow from the tool to three mutually perpendicular sensors. This increases the reliability and independence of the determination of the components of the cutting forces. The use of the clamping mechanism in the form of an elastic element - a spring increases the reliability of the sensors at the time of loading and ensures the absence of displacements arising from plastic deformations of the measuring system.

The invention is illustrated by drawings. Figure 1 shows a General view of the device; figure 2 is a front view; figure 3 is a top view.

A device for measuring the component of the cutting forces consists of a base 1, on which are fixed racks 2 with sensors 3, for example, strain gauges. A plate 4 is attached to the sensors 3 for mounting the workpiece 5 with the grab 6. Fixed racks 2 contain additional guides 7 with rolling friction units, with one degree of freedom. The plate 4 has a clamping mechanism made in the form of an elastic element - a spring 8, connected to the base 1 by a vertical strut 9.

The device operates as follows.

The processing tool (cutter) is pushed onto the workpiece 5. When cutting, a force arises from the tool to the workpiece 5. The components of the cutting force are independently measured by the device in three orthogonal directions using three corresponding sensors 3. By means of additional guides 7 with rolling friction units, when measuring cutting forces, achieve independence in determining the values of the components of the cutting force. In this case, the sensors 3 have one degree of freedom - movement in the direction perpendicular to the measured force. Due to this, the orthogonal components of the cutting force of the workpiece 5 are transmitted only to the respective sensors 3 (the workpiece is pre-attached to the plate 4).

Thus, the use of additional guides 7 on racks 2 with rolling friction units with one degree of freedom makes it possible to transfer the orthogonal components of the power flow from the tool to three mutually perpendicular sensors 3. This increases the reliability and independence of determining the components of the cutting forces.

Claims (2)

1. A device for determining components of the cutting force, comprising a base on which fixed racks are mounted with sensors that sense the orthogonal projections of the cutting force, and a plate for securing the workpiece, characterized in that it is equipped with rails mounted on racks with rolling friction units with one degree of freedom and a clamping mechanism to the racks of the plate for fixing the workpiece. 2. The device according to claim 1, characterized in that the clamping mechanism comprises an elastic element in the form of a spring.

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