RU2549560C2 - Method and device for monitoring accuracy of product shape, location and size of holes - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: reference square with indicator depthometers and a device with rearranged beams and calibres, perceiving deviations from the desired shape, location and size of holes, are mounted on the object. According to the values of the deviations obtained on the indicators the difference of the marginal references is calculated and compared with standard values, based on the entrance size of the hole of the object of the passages of the calibres the presence of deviations from the diameters and from the accuracy of the hole location is evaluated.

EFFECT: improvement of quality and accuracy of determining the deviation from the perpendicularity of the sides, the location and the diameters of the holes, providing versatility and operational capability during a single installation of the device on the object to assess the deviations of sides from perpendicularity and straightness with simultaneous assessment of compliance with the standard requirements, from the regularity of arrangement of the holes and their diameters, improvement of organisation of control through the operational comprehensive assessment of deviations, reducing the labour intensity of performing the measurements.

2 cl, 1 dwg

Description

The present invention relates to the woodworking industry and can be used to verify the accuracy of the shape of the product, the location and size of the holes on the shield and frame parts and assembly units.

A known stand for monitoring the relative position of the axes of the holes of the spatial structure (patent No. 2299398).

The disadvantages of this method are the complexity and limited capabilities of enterprises in creating a mathematical model of the product obtained using three-dimensional modeling.

There is also a method of controlling the alignment of holes in the bottom and on the wall of shells located at angles of 90 or more degrees, and a universal device for monitoring (No. 2290598).

The disadvantage of this method is the ability to take measurements only at the bottom and wall of conical and cylindrical shells.

A device for controlling the openings of parts is known (patent No. 2245516).

The disadvantage of this method is the limited use of the device only to control the internal holes and internal surfaces of the pipes.

A known method of checking the perpendicularity of the parties using a calibration square according to GOST 3749-77 "Squares testing 90 °. Technical conditions. "

The disadvantages of this method are the complexity and inconvenience of evaluating the perpendicularity of the form, the absence of fixation of the square on the surface of the product and the need for manual measurement using probes.

A known method of checking the perpendicularity of the parties using a calibration measuring angle (patent No. 2420713).

The disadvantage of this method is the complexity and inconvenience of assessing the perpendicularity of the form due to the need to convert the deviations expressed in degrees into millimeters for comparison with standard values and the inconvenience of measuring deviations from straightness using probes.

The task of the invention is to eliminate these disadvantages.

Technical result:

- improving the quality and accuracy of determining deviations from the perpendicularity of the sides, the location and diameters of the holes;

- ensuring versatility and operational ability for one installation of the device at the facility to assess deviations:

1) sides from perpendicularity and straightness with a simultaneous assessment of compliance with standard requirements (over a length of 1000 mm) without recounting;

2) from the correct location of the holes and their diameters;

- improving the organization of control due to the operational comprehensive assessment of deviations;

- reducing the complexity of the measurements.

The technical result is achieved by modernizing the design of the calibration square, equipping it with a device consisting of cross-mounted beams with gauges to control the location of holes and diameters while assessing deviations from the perpendicularity and straightness of the sides using indicator depth gauges placed on the square.

For this it is necessary, having modified the calibration square, to equip it with indicator depth gauges and additional rearranged beams with calibers installed on them.

Figure 1 shows a device for controlling the accuracy of the shape of the product, the location and size of the holes.

The measuring device includes a calibration square 1 with longitudinal holes in width on the plates, longitudinal and transverse beams 2 with calibers 3 installed at the intersection of the beams, and indicator depth gauges on both sides of the square.

The accuracy control of the product shape, location and size of the holes using the device is performed as follows:

- the device is assembled and configured according to a template or cutting cards by moving and securing the longitudinal and transverse beams 2 to the desired size according to the location of the holes on the calibration square 1;

- select the appropriate size of gauge plugs 3 in accordance with the design documentation;

- install indicator depth gauges 5 and configure;

- install the device on the test object 4, according to the testimony of a pair of indicator depth gauges calculate the difference in readings and compare with standard values; deviations from the diameters and from the accuracy of the location of the holes on the surface of the product are evaluated by the size of the entrance to the object’s opening of the gauge holes.

Thus, it is possible to quickly control a large number of products by moving the proposed device.

Claims (2)

1. A method of checking the accuracy of the shape of the product, the location and size of the holes, including the simultaneous measurement of deviations from the perpendicularity and straightness of the sides, the location and diameters of the holes, characterized in that when installing the device on the object, fix it, bringing it into contact with one of the sides, deviations are measured by indicator depth gauges and the difference of readings is calculated, comparing with standard values, deviations from ametrov Choose deviations in the location of the holes on the surface. 2. A device for checking the accuracy of the shape of the product, the location and size of the holes, including a calibration square with devices, characterized in that the calibration square is made with longitudinal holes on the plates with the possibility of installing longitudinal and transverse beams with gauges and indicator depth gauges that accept deviations of shape and size .

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