JP3162576U - Measurement of effective diameter of meter male screw and attachment used as limit gauge for work - Google Patents

Abstract

An effective diameter of a male screw for a general machine and an attachment used as a limit gage for machining are provided. Processing by operating digital caliper 8 by attaching upper 1 and lower 2 provided with chevron teeth 3 and 4 processed using special steel to outer jaws 9 and 10 of digital caliper 8. It is characterized by measuring the effective diameter of general male screws and using it as a limit gage for machining. [Selection] Figure 1

Description

The present invention relates to an effective diameter measurement of a general machine external thread that can be processed by attaching an attachment created on an outer jaw of a digital caliper, and a working limit gauge.

Conventionally, the effective diameter of a male screw is measured using a micrometer with a spherical piece or a wire of an appropriate diameter sandwiched between screws, and the working limit gauge is a screw limit gauge. Di was used.

This has the following drawbacks.
(B) When measuring the effective diameter using a wire, a wire with the best diameter that contacts at the midpoint of the slope of the screw is required, and skill is required for measurement with a micrometer waiting by hand.
(B) A micrometer with a spherical measuring piece is expensive and is not suitable when the external thread of the male thread to be measured is large.
(C) It is expensive to prepare various screw limit gauges as work limit gauges.

The present invention creates two parts of the same shape with special steel to measure the effective diameter of general machine external threads of the same nominal size to be machined and to measure with a digital caliper as the limit gauge for work. ) And the lower part (2), respectively, the angle tooth part (3), (4) and M4 tap (5), (6) and the pitch display part (7) on the surface, and the upper part (1) is a digital caliper ( 8) The external thread (9) of the lower part (2) is fixed to the outer jaw (10) with bolts (11) and (12) and processed with the same nominal male screw (15). It is an attachment for the upper part (1) and the lower part (2) for measuring the effective diameter and measuring with a digital caliper (8) as a limit gauge for work.

As described above, the present invention is simpler than the method of measuring the effective diameter using a wire, and the spherical measuring piece male screw micrometer is suitable when the external shape of the male screw is small, but the measurement is possible when it is large. Although it is not suitable, the present invention can be measured, and it can be measured as a limit gage for work, and the dimensional difference is set with a digital caliper based on the standard, so it is cheaper and easier to work with than the screw limit gage. It is.

Best mode for carrying out the invention

Attach the upper (1) attachment to the outer jaw (9) and the lower (2) attachment to the outer jaw (10) of the digital vernier caliper (8) that can be commercially available 0 set. 3) and (4) are accurately meshed and fixed with bolts (11) and (12), respectively. Inspect the machined male thread as a die.

Hereinafter, the present invention will be described with reference to the accompanying drawings for one embodiment (M = 16, P = 2).

FIG. 3 is a diagram showing the following procedure. The upper jaw (9) is attached to the outer jaw (9) of the dental caliper (8), and the lower jaw (2) is attached to the outer jaw (10). 4) is correctly meshed, tightened with bolts (11) and (12), respectively, and then the reset button (13) of the digital caliper (8) is pressed to set the scale of the liquid crystal display (14) to zero.

FIG. 4 is a diagram in which the effective diameter of the male thread of M16, P = 2 is actually measured. Since 14.7 is displayed on the liquid crystal display section (14), it indicates that the effective diameter has been confirmed.

FIG. 5 is a diagram showing the side of the work limit gauge. The reset button (13) is pushed to the value obtained by subtracting the dimensional difference below the effective diameter value on the liquid crystal display part (14), and the male thread passes. It is the figure which confirmed passing through the side.

FIG. 6 is a diagram showing the stop side of the limit gage for machining, and confirms whether the male screw stops by pushing the reset button (13) to a value obtained by subtracting the dimensional difference below the effective diameter on the liquid crystal display (14). FIG.

It is a perspective view which shows the principal part of this invention. It is explanatory drawing which shows the use condition of this invention. It is a figure which shows the procedure of this invention. It is a measurement figure of the effective diameter of this invention. It is a figure which shows the street side of the limit gage for work of this invention. It is a figure which shows the stop side of the limit gauge for work of this invention.

DESCRIPTION OF SYMBOLS 1 Upper attachment 2 Lower attachment 3 Upper attachment chevron 4 Lower attachment tooth 5 Pitch display 6 M4 tapped hole 7 M4 tapped hole 8 Digital caliper 9 Outer jaw (left)
10 Outer jaw (right)
11 M4 bolt 12 M4 bolt 13 Reset button 14 Liquid crystal display

Claims (1)

Create two parts of the same shape using special steel and use them for the upper part (1) and the lower part (2), and for the upper part (1) and the lower part (2) JIS-based basic chevron and chevron teeth (3) and (4) of basic dimensions are provided individually so that they can be engaged with each other, M4 tap (5) for upper part (1), M4 tap for lower part (2) (6) and a display portion (7) of pitch on the surface, respectively, the upper jaw (9) for the outer jaw (9) of the digital caliper (8), the lower jaw (2) for the outer jaw (10), Effective diameter of male screw for general machinery that can be processed by accurately engaging the chevron teeth (3) and (4) and fixing the upper part (1) with the bolt (11) and the lower part (2) with the bolt (12). Attachment for use as a limit gauge for measurement and work.

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