JPH0530703U - Step gauge for curved surface - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a step gauge capable of easily measuring the dimension of the step portion of a work having a reference measurement surface as a curved surface without causing a measurement error. [Configuration] A reference plate 25 is orthogonal to the lower portion of the main scale 20 of a general-purpose step gauge in which a vernier 21 having a measuring rod 22 attached to a measured portion of a step portion of a work is slidably mounted on the main scale 20. A plurality of copying pins 26 are provided on the reference plate 25 so as to be capable of advancing and retracting so that the tips project from the reference surface, and the copying pins 26 at both ends are independently provided by a pair of fixing bolts 35 provided on the reference plate. The center intermediate bolt 40 provided on the reference plate 25 can be used to collectively fix the other copying pins 26 in the middle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a step gauge that measures a step with reference to a part of a curved surface of a work.

[0002]

[Prior Art]

 As shown in Fig. 5, when measuring the dimension (a) of the step generated between the first work (1) and the second work (2) which are arranged opposite to each other, usually, a step gauge or a caliper depth is measured. It is measured at.

As shown in FIG. 6, the measurement with the step gauge (3) is performed by bringing the measurement reference surface (gauge reference surface) (5) of the main scale (4) into contact with the first work (1) having a high height. , The vernier (6) provided on the main scale (4) is lowered, the measuring rod (7) attached to the vernier (6) is brought into contact with the second work (2), and in this state, the scale of the main scale (4) is graduated. (10) and the scale (11) of the vernier (6) are read and measured.

Further, as shown in FIG. 7, the measurement with the caliper (12) is performed by bringing the reference surface (14) of the depth of the main scale (13) into contact with the first work (1) having a high height. The measurement is performed by bringing the Noosa (15) into contact with the second work (2).

[0005]

[Problems to be solved by the device]

 In the above measurement, for example, in the case of the step gauge (3), since the measurement surface (5) of the main scale (4) is formed on the flat surface, the measurement surface (1a) of the first workpiece (1) to be measured is flat. Since the main scale (4) is stable on the face, accurate measurement can be performed. However, as shown in FIG. 8, when the measurement surface (1a) of the first work (1) is a curved surface, the main scale (4) is not stable on the first work (1) during measurement, and A measurement error occurs depending on how the scale (4) is applied.

When using the caliper (12), a measurement error similarly occurs.

The present invention is intended to provide a step gauge capable of performing accurate measurement even when the reference measurement surface of a workpiece is a curved surface.

[0008]

[Means for Solving the Problems]

 This invention comprises a main scale, a vernier slidably mounted on the main scale, a measuring rod attached to the vernier, and a shape-following reference plate attached orthogonally to a reference end of the main scale, A plurality of profiling pins built in the shape profiling reference plate so that the tips project from the measurement reference plane, and the profiling pins, which are arranged on both sides of the shape profiling reference plate, of the plurality of profiling pins are independently fixed. It is a step gauge that includes a pair of fixing bolts and a center bolt that fixes the intermediate copying pins together.

[0009]

[Action]

 The step gauge with the above structure is placed on the curved surface part that serves as the measurement reference of the workpiece for measuring the copy pin provided on the shape copy reference plate, so that the shape copy reference plate is parallel to the tangent line serving as the reference of the curved surface part. Adjust the protrusion amount of each copying pin and fix it. Then, in this state, measure by applying the measuring rod provided on the vernier to the surface to be measured. In addition, the copy pins provided on the shape copy reference plate may be fixed to only the two copy pins at both ends depending on the shape of the curved surface of the workpiece to be contacted, or all copy pins may be fixed to the work pin. Make it imitate the shape of Ku.

In the above measurement, when a large number of workpieces of the same shape are measured, the master work of the workpieces is used to adjust the protrusion amount of the copying pin in advance, and the step gauge after the adjustment is measured. Apply and measure.

According to this configuration, the shape-tracking reference plate of the step gauge always comes into contact with the measurement reference surface of the work piece in a fixed relationship, so that no measurement error occurs.

Further, when the measurement reference surface is a flat end surface, all the copying pins provided on the shape copying reference plate are projected and fixed by the same amount, and the measurement is performed in this state.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the step gauge is a general step gauge having a main scale (20), a vernier (21), and a measurement rod (22), and a curved surface portion (24) of a work (23). 2) is provided with a shape copying reference plate (25) and copying pins (26) (26).

The main scale (20) is formed in a straight line, a vernier (21) is slidably mounted, and a measurement scale (27) is formed in a range in which the vernier (21) slides. On the other hand, a measuring scale (28) is also formed on the vernier (21) and indicates the measuring dimension together with the measuring scale (27) of the main scale (20). The vernier (21) has a support rod (30) mounted on one side in a direction orthogonal to the sliding direction, and the measuring rod (22) is slidably and vertically mounted on the supporting rod (30), and a set screw ( 31) and the adjusting bolt (32) respectively. The vernier (21) can be fixed to the main scale (20) with a set screw (33).

A shape following reference plate (hereinafter simply referred to as a reference plate) (25) is attached to a reference end of the main scale (20) so as to be orthogonal to the main scale (20), and a reference surface (34) is a flat end surface. Is formed. A large number of copying pins (26) (26) ... Are slidably inserted into the reference plate (25), and each tip of the reference plate is moved by a spring (not shown) incorporated in the reference plate (25). It is designed to be constantly projected from the reference plane (34) of (25).

The protrusion amounts of the respective copying pins (26) (26) ... Are all set to be the same, and the heights are uniform when no external force acts. Further, as shown in FIG. 2, for example, the copying pins (26) (26) are provided with the copying pins (26) (26) arranged at both ends on both side walls of the reference plate (25), respectively. The fixing pins (35) and (36) are independently fixed, and the other intermediate copying pins (26) (26) are fixed to the front wall (37) of the reference plate (25). The center bolts (40) are provided so as to fix them all together via the stopper plate (41).

At the time of measurement, as shown in FIG. 3, the step gauge uses a master work (42) in which a curved surface portion (24) serving as a measurement reference of the work (23) to be measured is reproduced, and is used as a standard. After the copying pins (26) (26) provided on the plate (25) are fixed along the curved surface portion (43), the work (23) is measured. That is, as shown in FIG. 3, the reference plate (25) of the step gauge is pressed against the curved surface portion (43) of the master work (42), and the copying pins (26) (26) ... Shape of the curved surface portion (43). Following this, the reference plate (25) is retracted into the reference plate (25), the reference surface (34) of the reference plate (25) is made to coincide with the tangent line with respect to one point of the curved surface portion (43), and the fixing bolt ( 35) (36) and the center bolt (40) are tightened to fix the respective copying pins (26) (26). Next, the tip of the measuring rod (22) is brought into contact with the surface to be measured (44) of the master work (42), and at this time, the measurement scale (27) of the main scale (20) and the vernier (21) are measured. The height of the measuring rod (22) is adjusted so that the zero of the scale (28) coincides.

After the adjustment as described above, as shown in FIG. 4, the reference plate (25) of the step gauge is applied to the curved surface portion (24) of the work (23), and the measurement rod (22) is measured. The dimension (a) of the step is obtained by contacting the surface (45) with the measuring scales (27) and (28) of the main scale (20) and the vernier (21) at this time.

The copy pins (26) (26) provided on the reference plate (25) are provided at both ends of the copy pin (26) if the curved surface part (24) of the workpiece (23) to be measured has a simple shape. ) (26) may be fixed and measured.

[0021]

[Effect of the device]

 According to this invention, the copy pin provided on the reference plate accurately positions the reference plate according to the shape of the curved surface portion of the workpiece to be measured, so that the dimension of the step difference of the workpiece with respect to the curved surface portion is accurately measured. Can be measured.

Further, by providing a large number of scanning pins and selecting two-point support by the scanning pins at both ends or all-point support by all the scanning pins, it is possible to perform measurement on a curved surface portion of any shape.

[Brief description of drawings]

FIG. 1 is a front view of a step gauge according to the present invention.

FIG. 2 is a cross-sectional plan view of a reference plate.

FIG. 3 is a front view showing a step gauge during adjustment.

FIG. 4 is a front view of the step gauge during measurement.

FIG. 5 is a sectional view showing an example of a step difference of a workpiece to be measured.

FIG. 6 is a partially cutaway front view showing measurement by a conventional step gauge.

FIG. 7 is a partially cutaway front view showing measurement by a caliper depth section.

FIG. 8 is a partially cutaway front view showing a problem of measurement with a conventional step gauge.

[Explanation of symbols]

 20 main scale 21 vernier 22 measuring rod 25 reference plate 26 copying pin 35 fixing bolt 36 fixing bolt 40 center bolt

Claims (1)

[Scope of utility model registration request] 1. A main scale, a vernier slidably mounted on the main scale, a measuring rod mounted on the vernier, and a shape-following reference plate mounted orthogonal to a reference end of the main scale. , A plurality of copying pins built in the shape copying reference plate so that the tip projects from the measurement reference surface, and a plurality of copying pins, which are arranged on both sides of the shape copying reference plate, are independently fixed. A step gauge for a curved surface portion, comprising a pair of fixing bolts and a center bolt for fixing the intermediate copying pins together.