JPH10246603A - Method and device for inspecting diameter of annular chamfering part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and accurately inspect the diameter of a chamfering part formed on the end of a work. SOLUTION: A cylindrical or columnar work having an annular chamfering part on the end is supported so that an axial line is horizontal. The quality of the diameter of the chamfering part of the work is judged by comparing a numerical value which the pointer 19b of a stationary dial gage 19 abutted on the prescribed part of the chamfering part indicates with another numerical value which the dial gage 19 indicates at the time when the work finished in regulation size is abutted on the chamfering part 22 of the reference product of the same shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting the diameter of an annular chamfer formed at an end of a cylindrical or columnar work.

[0002]

2. Description of the Related Art As shown in FIG. 3, both ends of a cylindrical tappet (1) used in a valve train of an engine are chamfered in an annular shape. The diameter of the end in the axial direction of the chamfered portion (2) affects the thickness of the sprayed layer when the sprayed coating is formed on the outer peripheral surface, and therefore, high precision is required. Conventionally, FIG.
The quality of the diameter of the chamfered portion (2) was determined as shown in FIG.

FIG. 4 (3) shows a plate-like limit gauge, which has inspection grooves for inspecting the diameter of the chamfered portion (2) on the lower side and the upper side, respectively.
(4) and (5) are cut out, and the dimension between the left and right slopes in both inspection grooves (4) and (5) is the lower limit and upper limit of the allowable range of the diameter of the chamfer (2), respectively. Has become.

The inspection grooves (4) and (5) of the gauge (3) are alternately pressed against the chamfered portion (2) of the tappet (1), and the tappet (1) is pressed.
The quality of the diameter of the chamfered portion (2) is determined based on the gap formed between the end surface of (1) and the bottom of the inspection grooves (4) and (5). That is, when the diameter of the chamfered portion (2) is within the allowable range, FIG.
As shown in the figure, the tappet end face (1a) and the lower
There is a slight gap (6) between the base and (4).

The gap (6) is visually observed by an operator, and the diameter of the chamfer (2) is determined based on the size of the gap.

[0006]

However, it is necessary to be skilled to visually and accurately determine the size of the gap (6), and variations occur due to individual differences among the measurers, and the reliability of the test results is lacking.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a method and an apparatus which allow anyone to easily, quickly and accurately inspect the diameter of a chamfer.

[0008]

According to the method of the present invention,
The above problem is solved by supporting a cylindrical or columnar work having an annular chamfer at an end so that an axis thereof is horizontal, and a pointer of an immovable dial gauge abutting a predetermined portion of the chamfer. By comparing the numerical value shown and the numerical value shown by the dial gauge when brought into contact with the chamfered part of the standard product having the same shape as the work finished to the specified dimension, the diameter of the chamfered part of the work is obtained. The problem is solved by determining pass / fail.

Further, according to the device of the present invention, the above-mentioned problems are:
A V-block provided on a base for horizontally supporting a cylindrical or columnar work having an annular chamfer at an end, a work positioning stopper provided on the end of the V-block, A pillar is provided on one side with a height adjustable, and a dial gauge is provided on the pillar so that the tip can contact the annular chamfer of the work at right angles so that the height can be adjusted. It is solved by.

[0010]

1 and 2 show one embodiment of the present invention, which is cut on the upper surface of a cubic base (7) and faces left and right in FIG. A V-block (9) is fitted in the support groove (8) and is detachably fixed by a first bolt (10) screwed into the front surface of the base (7). .

A positioning stopper (12) having an upper end protruding above the V-block (9) is fitted into a vertically-adjusting adjusting groove (11) cut in the upper left surface of the base (7). The V-block (9) is fixed by the second bolt (13) provided on the stopper (12).
It is fixed to the left side of. In the center of the upper end of the stopper (12), a U-shaped concave groove (14) is cut out.

An arm (1) protruding from the lower left side of the base (7) is provided.
At the left end of 5), the lower end of the column (16) facing upward is fitted,
The height is adjustable by a third bolt (17) provided on the arm (15).

At the center of a holder (18) inclined upward and to the right, which is fixed to the upper end of the support (16), a dial cage (19) inclined downward and to the right is provided at the tip of the holder (18). 4 volts
By (20), it is movably fixed in the axial direction.

In order to inspect the diameter of the chamfered portion of the tappet using the above-described apparatus, the height of the stopper (12) is fixed so as not to hinder the verification operation described later, and then the V-block is checked.
(9) A master work (standard product) of the same shape as the tappet (1) above, with each part finished to specified dimensions (21)
Is placed with the chamfered portion (22) to be inspected facing left, and the left end is pressed against the stopper (12).

Next, loosen the third and fourth bolts (17) and (20), adjust the height of the support (16) and the holder (18), and attach the measuring needle (19a) of the dial gauge (19). , Lightly contact the chamfered part (22) of the master work (21), and
b) to the 0 position of the scale (19c), and then tighten both bolts (17) (2
Tighten 0).

Thereafter, the tappet to be measured (1)
Instead of the master work (21), place the master work (21) on the V-block (9) in the same manner and bring the tip of the measuring needle (19a) into contact with the chamfered part. Scale indicated by (19b)
From the numerical value of (19c), the accuracy of the diameter of the chamfered portion (2) of the tappet (1) can be accurately known.

The tappet on the V block (9)
By rotating (1), the deflection of the pointer (19b) at that time
The roundness of the chamfer (2) can also be inspected.

[0018]

According to the present invention, the measuring needle of the dial gauge is brought into contact with the chamfered portion of the workpiece and the standard product, and the scale indicated by the pointer at that time is read. The diameter of the part can be inspected with high accuracy. Therefore, unlike the related art, there is no need for skill in the work, and there is no individual difference in the test result.

[Brief description of the drawings]

FIG. 1 is a front view of the device of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the tappet at a central vertical section.

FIG. 4 is a front view taken along a center line showing a procedure for inspecting a tappet with a conventional limit gauge.

[Explanation of symbols]

 (1) Tappet (1a) End face (2) Chamfer (7) Base (8) Support groove (9) V block (10) First bolt (11) Adjustment groove (12) Stopper (13) Second bolt (14) Recessed groove (15) Arm (16) Post (17) Third bolt (18) Holder (19) Dial gauge (19a) Measuring needle (19b) Pointer (19c) Scale (20) Fourth bolt (21 ) Master work (standard product) (22) Chamfer part

Claims (2)

[Claims] 1. A stationary dial gauge pointer for supporting a cylindrical or columnar work having an annular chamfer at its end so that its axis is horizontal and abutting a predetermined portion of the chamfer. The diameter of the chamfered part of the work is obtained by comparing the numerical value indicated by ダ イ ヤ ル with the numerical value indicated by the dial gauge when brought into contact with the chamfered part of the standard product having the same shape as the work finished to the specified dimension. A method for inspecting the diameter of an annular chamfer, characterized by determining the quality of the circular chamfer. 2. A V-shaped support provided on a base for horizontally supporting a cylindrical or columnar work having an annular chamfer at an end.
A block, a work positioning stopper erected on the end surface thereof, a column erected on one side of the base so as to be height-adjustable, and a tip of the column erected on an annular chamfer of the work. A dial gauge provided so as to be adjustable in height so as to be able to abut at a right angle.