A transition tool for measuring geometric tolerance dimensional accuracy

Abstract

The present invention discloses a transition tooling for measuring the dimensional accuracy of form and position tolerances, comprising a base, a rotating shaft installed in the base through a bearing, a pressure cap fixed on the base and an inner locking ring fixed on the rotating shaft respectively provided at the lower end of the bearing, an outer fixing ring provided at the lower end of the inner locking ring, an extension shaft connected to the upper end of the rotating shaft, a positioning plate connected to the upper end of the extension shaft, a calibration plate provided at the upper end of the positioning plate, a steel ball provided at the center position between the calibration plate and the positioning plate, the calibration plate and the positioning plate are connected by a large gasket and a long screw to adjust the flatness accuracy of the calibration plate. The base of the present invention is installed on the reference plane of the frame part in the machine assembly, the long screw on the positioning plate is adjusted, and the calibration plate is rotated in conjunction with the rotating shaft, so that the runout accuracy of the reference plane end installed on the base is completely transitioned to the calibration plate, thereby improving the repair efficiency of large-scale frame parts in mechanical assembly, product accuracy and assembly efficiency.

Description

Technical Field

[0001] The invention belongs to the field of repair and grinding of assembly parts, and in particular relates to a transition tool for measuring form and position tolerance dimensional accuracy. Background Art

[0002] To ensure product assembly accuracy, measuring equipment is not available during the precision assembly process. Instead, fitters perform a trial assembly, then use a crane to hoist one of the assembled parts as a transitional fixture to measure the form and position tolerances of the remaining parts. This in-process measurement method increases cumulative errors and the difficulty of measurement during the assembly process, even leading to inaccurate measurements, low efficiency, and potential safety hazards. Summary of the Invention

[0003] The purpose of the present invention is to provide a transition tool for measuring the dimensional accuracy of form and position tolerances to solve the problems in the above-mentioned background technology.

[0004] The technical solution adopted to achieve the above-mentioned purpose is a transition tool for measuring the dimensional accuracy of form and position tolerances, including a base, a rotating shaft installed in the base through a bearing, the lower end of the bearing is respectively provided with a pressure cover fixed on the base and an inner locking ring fixed on the rotating shaft, the lower end of the inner locking ring is provided with an outer fixing ring, the upper end of the rotating shaft is connected to an extension shaft, the upper end of the extension shaft is connected to a positioning plate, the upper end of the positioning plate is provided with a calibration plate, a steel ball is provided at the center position between the calibration plate and the positioning plate, the calibration plate and the positioning plate are connected by a large gasket and a long screw to adjust the flatness accuracy of the calibration plate.

[0005] Furthermore, there are two bearings, which are installed between the rotating shaft and the base. An outer spacer is provided between the two bearings, and an inner spacer is provided inside the outer spacer.

[0006] Furthermore, the pressure cover and the base, the rotating shaft and the extension shaft, and the extension shaft and the positioning plate are all fixedly connected by gaskets and screws.

[0007] Furthermore, the pressure cover and the inner locking ring are both placed on the lower side of the bearing. The pressure cover is fixed on the base and is used to limit the outer ring of the bearing; the inner locking ring is clamped on the rotating shaft and is used to limit the inner ring of the bearing.

[0008] Furthermore, corresponding V-shaped holes are provided at the center positions between the calibration plate and the positioning plate, and the steel balls are installed in the V-shaped holes.

[0009] Beneficial effects

[0010] Compared with the prior art, the present invention has the following advantages.

[0011] 1. The base of the present invention is mounted on the reference plane of the frame part in the machine assembly. By adjusting the long screw on the positioning plate, the runout accuracy of the reference plane end of the base installation is transferred to the calibration plate. At the same time, combined with the rotation of the rotating shaft, the runout accuracy of the reference plane end of the base installation is completely transferred to the calibration plate. The measurement position on the other side can be transitionally detected and measured, including the coaxiality of its end face, inner hole and outer circle relative to the reference plane, the runout accuracy of the plane end and the parallelism and other shape and position dimensional accuracy. This not only improves the accuracy and efficiency of measurement, but also ensures the assembly accuracy and reliability of the product after the parts are assembled.

[0012] 2. The tooling of the present invention has a simple structure, is economical and feasible, and can also be used as a separate inspection tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 A top view of the structure of the present invention;

[0016] Figure 3 A bottom view of the structure of the present invention;

[0017] Figure 4 It is a structural schematic diagram when implementing the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments and drawings.

[0019] like Figure 1-Figure 3 As shown, a transition tooling for measuring form and position tolerance dimensional accuracy comprises a base 1, wherein a rotating shaft 9 is installed in the base 1 through a bearing 2, the lower end of the bearing 2 is respectively provided with a pressure cover 6 fixed on the base 1 and an inner locking ring 10 fixed on the rotating shaft 9, the lower end of the inner locking ring 10 is provided with an outer fixing ring 11, the upper end of the rotating shaft 9 is connected with an extension shaft 8, the upper end of the extension shaft 8 is connected with a positioning plate 12, the upper end of the positioning plate 12 is provided with a calibration plate 13, a steel ball 14 is provided at the center position between the calibration plate 13 and the positioning plate 12, the calibration plate 13 and the positioning plate 12 are connected by a large gasket 16 and a long screw 15 to adjust the flatness accuracy of the calibration plate 13.

[0020] There are two bearings 2 , which are installed between the rotating shaft 9 and the base 1 . An outer spacer 3 is provided between the two bearings 2 , and an inner spacer 4 is provided inside the outer spacer 3 .

[0021] The pressure cover 6 and the base 1 , the rotating shaft 9 and the extension shaft 8 , and the extension shaft 8 and the positioning plate 12 are all fixedly connected by gaskets 7 and screws 5 .

[0022] The pressure cover 6 and the inner locking ring 10 are both placed on the lower side of the bearing 2. The pressure cover 6 is fixed on the base 1 and is used to limit the outer ring of the bearing 2; the inner locking ring 10 is clamped on the rotating shaft 9 and is used to limit the inner ring of the bearing 2.

[0023] A corresponding V-shaped hole is provided at the center position between the calibration plate 13 and the positioning plate 12, and the steel ball 14 is installed in the V-shaped hole.

[0024] In the present invention, an extension shaft 8 is provided at the upper end of the rotating shaft 9, the positioning plate 12 is located at the upper end of the extension shaft 8, a steel ball 14 is provided at the center position of the upper end of the positioning plate 12, and a calibration plate 13 is provided at the upper end of the steel ball 14. The calibration plate 13 is connected to the positioning plate 12 by a large gasket 16 and a long screw 15.

[0025] When the present invention is specifically implemented, Figure 4 As shown, the bottom reference surface A of the base 1 is the side measurement reference surface for fixed installation with the machine frame part 18. The reference surface A is selected with a reasonable flatness. After being fixed through the screw holes on the base, the measured reference surface E is transitioned to the reference surface B at the upper end of the calibration plate, which solves the problem that the measuring equipment cannot achieve measurement during the on-site assembly process. By adsorbing the magnetic base with a micrometer 17 on the calibration plate 13, the measurement conditions of the parallelism accuracy, flatness accuracy and other form and position dimensional accuracy of the measuring positions F and G on the other side relative to the reference surface E can be measured.

[0026] The extended shaft 8 is precisely mounted on a precision rotating shaft system consisting of a bearing 2, an outer spacer 3, an inner spacer 4, a pressure cover 6, a rotating shaft 9, an inner locking ring 10, an outer fixed ring 11 and a base 1. During measurement, the base 1 is fixedly mounted on the measuring reference surface. By rotating the rotating shaft 9, the extended shaft 8 can be rotated, and the positioning plate 12, the steel ball 14 and the calibration plate 13 can be driven to rotate. The magnetic base with a micrometer 17 is adsorbed on the calibration plate 13 to achieve transition detection and measurement of the coaxiality accuracy index and parallelism accuracy index of the other measuring end position F, G, and H.

[0027] The runout accuracy of the plane of the calibration plate 13 can be adjusted by a large screw 15, and the end face runout of the mounting reference A surface of the base 1 can be transferred to the calibration plate 13. The distance relative to the positioning plate 12 is adjusted by the long screw 15 provided on the positioning plate 12, so that the positioning plate 12 and the steel ball 14 in the center V-shaped hole of the calibration plate 13 are adjusted by creeping positioning, so as to realize the transition of the plane end runout accuracy of the mounting base 1 reference to the calibration plate 13, and at the same time, the adjustment of the plane end face runout accuracy of the calibration plate 13 itself can also be realized. In the transition detection measurement, the magnetic base with the micrometer 17 is adsorbed on the calibration plate 13, and the calibration plate 13 is rotated to quickly measure the relative parallelism accuracy and plane end runout accuracy of the measurement position on the other side of the mounting surface reference of the assembled parts.

[0028] The working principle of the present invention is to calibrate the end runout accuracy of the reference surface E of the part 18 to be repaired by the gauge 17 in the machine, and install the base 1 on the reference surface E of the repaired part. After tightening, adjust the plane end runout accuracy of the calibration plate 13 to be consistent with the reference surface, realize the transition of the reference to the calibration plate 13, adsorb the magnetic gauge base with micrometer 17 on the calibration plate 13, measure the radial runout of the other end hole H of the part 18, that is, the coaxiality accuracy, and the runout of the opposite end face F of the hole, so as to calculate the shape and position dimensional accuracy index of the repair measurement position. When the base 1 is horizontally installed and fixed on the workbench, adjust the long screw 15 on the calibration plate 13 to level the plane runout accuracy of the calibration plate 13 itself, adsorb the magnetic gauge base with micrometer 17 on the calibration plate 13, rotate the calibration plate 13, and then measure the plane runout accuracy of the measured part. The transition fixture device is easy to fix and simple to operate.

[0029] The present invention provides a transition tool for measuring the accuracy of form and position tolerances, comprising a base 1 for fixing a measuring reference surface, wherein two bearings 2 are installed in the base 1, and the two bearings 2 are arranged in the upper and lower positions in the base 1; an outer spacer 3 and an inner spacer 4 are provided between the two bearings 2; a pressure cover 6 is provided at the lower ends of the two bearings 2, and the pressure cover 6 is fastened to the base 1 through a gasket 7 and a screw 5; a rotating shaft 9 is provided in the bearing 2, and an inner locking ring 10 and an outer fixing ring 11 are provided at the lower end of the rotating shaft 9, and the inner locking ring 10 and the outer fixing ring 11 are used to rotate the bearing 2. The shaft 9 is fixed in the bearing 2 in the base 1; an extension shaft 8 is provided at the upper end of the rotating shaft 9, and the connection between the extension shaft 8 and the rotating shaft 9 is fastened by a gasket 7 and a screw 5; the positioning plate 12 is located at the upper end of the extension shaft 8, and the connection between the positioning plate 12 and the extension shaft 8 is fastened by a gasket 7 and a screw 5; a steel ball 14 is provided at the center position of the upper end of the positioning plate 12, and a calibration plate 13 is provided at the upper end of the steel ball 14. The calibration plate 13 is connected to the positioning plate 12 for adjustment by a large gasket 16 and a long screw 15 installed on the positioning plate 12 at one end. The base 1 is mounted on the reference plane E. By adjusting the long screw 15 on the positioning plate 12, the reference plane runout accuracy of the base 1 is transferred to the calibration plate 13. The calibration plate 13 is equipped with an adjustable measuring table 17. At the same time, combined with the rotation of the rotating shaft 9, the transition of the reference plane E can be achieved on the calibration plate, so that the coaxiality, plane runout and parallelism accuracy indicators of the measured position on the other side of the measurement and the reference plane are achieved. This solves the problem of re-measurement and revision of the form and position tolerance dimensional accuracy of large frame parts in on-site assembly, improves the revision efficiency in mechanical assembly, product accuracy and assembly efficiency. The present invention has a simple structure and is suitable for transition measurement of the form and position tolerance dimensional accuracy of various large frame parts.

Claims

1. A transition tool for measuring geometric tolerance dimensional accuracy, comprising a base (1), characterized in that: A rotating shaft (9) is installed in the base (1) through a bearing (2), and the lower end of the bearing (2) is respectively provided with a pressure cover (6) fixed on the base (1) and an inner locking ring (10) fixed on the rotating shaft (9), and the lower end of the inner locking ring (10) is provided with an outer fixing ring (11), the upper end of the rotating shaft (9) is connected to an extension shaft (8), and the upper end of the extension shaft (8) is connected to a positioning plate (12), and the upper end of the positioning plate (12) is provided with a calibration plate (13), and a steel ball (14) is provided at the center position between the calibration plate (13) and the positioning plate (12), and the calibration plate (13) and the positioning plate (12) are connected by a large gasket (16) and a long screw (15) to adjust the flatness accuracy of the calibration plate (13); The gland (6) and the base (1), the rotating shaft (9) and the extension shaft (8), and the extension shaft (8) and the positioning plate (12) are all fixedly connected via gaskets (7) and screws (5); The pressure cover (6) and the inner locking ring (10) are both placed on the lower side of the bearing (2); the pressure cover (6) is fixed on the base (1) and is used to limit the outer ring of the bearing (2); the inner locking ring (10) is fixed on the rotating shaft (9) and is used to limit the inner ring of the bearing (2).

2. The transition tool for measuring geometric tolerance dimensional accuracy according to claim 1, characterized in that: There are two bearings (2), which are installed between the rotating shaft (9) and the base (1). An outer spacer (3) is provided between the two bearings (2), and an inner spacer (4) is provided inside the outer spacer (3).

3. The transition tool for measuring form and position tolerance dimensional accuracy according to claim 1, characterized in that: A corresponding V-shaped hole is provided at the center position between the calibration plate (13) and the positioning plate (12), and the steel ball (14) is installed in the V-shaped hole.

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