JPH0422247Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chamfer measuring device that can measure the dimensions and angle of a chamfer of a workpiece at the same time.

Conventionally, to measure the chamfered part of a workpiece, as shown in Fig. 1, a chamfer measuring gauge 2 is applied to the workpiece 1 to measure the dimension 3 of the chamfered part, and then as shown in Fig. 2, a chamfered part of the workpiece 1 is measured. The guide finger 6 of the protractor 5 is applied to the slope 4 to measure the angle 7 between the slope 4 and the extended imaginary plane of the end face of the workpiece 1.

However, with such conventional chamfer measuring instruments, the dimension 3 and angle 7 of the chamfer are measured separately, which takes time to measure and makes it difficult for the measurer to measure a workpiece with many measuring points. cause fatigue,
Problems have arisen as the measurement speed decreases.

This idea was made in view of the above circumstances,
A V-shaped recess with a 90° bevel angle is formed at one end,
A dimension scale is provided on the surface of the concave portion along the plane of the concave portion, and a center of rotation is provided on the opposite side of the concave portion with respect to a rotation center provided on the bisector of the groove angle. a gauge plate having an angular scale attached to the surface along the circular arc portion; a pin provided at the center of rotation; and a gauge plate rotatable relative to the gauge plate via the pin. a guide/instruction plate attached to the guide/instruction plate, a long hole into which the pin is slidably fitted is provided in a portion of the guide/indication plate where the pin is attached, and an elongated hole is provided at one end of the guide/indication plate. , an angle reading instruction section for reading the angle scale is provided, and further, an angle reading instruction section is provided at the other end of the guide instruction plate, and an angle reading instruction section is provided at the other end of the guide instruction plate along a direction perpendicular to the center line of the elongated hole and superimposed on the recess of the gauge plate. The chamfer is characterized by a flat surface that can measure the dimensions and angle of the chamfered part at the same time, which can significantly shorten the measurement time and reduce the fatigue of the measurer. An object of the present invention is to provide a chamfer measuring device that can prevent chamfering.

An embodiment of this invention will be described below with reference to FIGS. 3 to 6. Reference numeral 11 in FIG. 3 is a workpiece, and a chamfered portion 12 is formed at one end of the workpiece 11. The dimension 13 and angle 14 of this chamfer 12 are measured by a chamfer measuring device 15. The chamfer measuring device 15 has a gauge plate 16 and a pin 1.
7 and a guide and instruction board 18.

The gauge plate 16 is a rectangular plate with a substantially sector-shaped portion provided on one side.
A V-shaped recess 19 with a groove angle 19a of 90° is formed at one end of the groove 6. The gauge plate 16 has a guide plate 18 located on the bisector 19b of the groove angle of the recess 19, as described later.
A pin hole 20 is formed into which a pin 17 serving as a center of relative rotation with respect to the pin hole 20 is inserted. Also, gauge plate 1
At the other end of 6 is the center of the pin hole 20, that is, the gauge plate 16.
A circular arc portion 21 is formed around the center of rotation. A dimension scale 23 is engraved on the surface of the gauge plate 16 along the inner surface of the recess 19 with the bottom point 22 of the recess 19 as a base point. Base lines 24 and 25 are also provided on the surface of the gauge plate 16 in parallel to the inner surface of the recess 19 with the center of rotation, that is, the center of the pin hole 20 as the center.
is engraved, and a circular arc portion 2 is formed between these base lines 24 and 25.
An angle scale 26 is engraved along 1.

A guide and instruction plate 18 is rotatably attached to the back surface of the gauge plate 16. This guide instruction board 18
is formed into a T-shape and has a flat portion 27 at one end. Further, a long hole 28 perpendicular to the flat portion 27 is formed in the guide/instruction plate 18 and located near the flat portion 27 . Further, as shown in FIG. 5, a knob 29 is attached to a predetermined location on the guide/instruction plate 18. The guide/instruction plate 18 is superimposed on the back side of the gauge plate 16, and the head 1 is inserted into the elongated hole 28.
7a in the pin hole 2 of the gauge plate 16.
The pin 17 is fastened to the gauge plate 16 by a nut 17b that is inserted through the pin 17 and screwed into a threaded portion formed at the tip of the pin 17. Guidance board 18
At the other end, an angle reading instruction section 30 consisting of a scribing line is carved on the center line of the elongated hole 28, as shown in FIGS. 3 and 4. Note that the gauge plate 16 and the guide/instruction plate 18 may be formed of transparent plates.

Therefore, when using the chamfer measuring device configured as described above, (1) the recess 19 of the gauge plate 16 is brought close to the chamfer 12 of the work 11 which is the object to be measured;

(2) Loosen the nut 17b so that the guide plate 18 can be moved freely with respect to the gauge plate 16.

(3) Hold the chamfer measuring device 15 with one hand and move it in the direction of arrow W in Fig. 3 to press the inner surface of the recess 19 of the gauge plate 16 against the side and end surfaces of the workpiece 11, and guide it with the other hand. Instruction board 18
Hold the knob 29 and move the knob 29 to press the flat part 27 against the chamfered part 12 of the workpiece 11.

(4) Turn the nut 17b to guide the gauge plate 16 while making sure that the inner surface of the recess 19 is in close contact with the side and end surfaces of the workpiece 11 and that the flat part 27 is in close contact with the chamfered part 12 of the workpiece 11. Tighten it to the plate 18.

(5) Dimension 13 of the chamfer 12 from the dimension scale 23 and angle scale 26 of the chamfer measuring device 15, respectively.
Read angle 14. This angle 14 is the point where the angle reading instruction section (marked line) 30 coincides with the scale line of the angle scale 26.

It is proven as follows that the angle read value of this angle scale 26 (point B in FIGS. 3 and 6) becomes the angle 14 of the chamfered portion 12. That is, in Fig. 6, if the intersection points of the lines shown in this figure are A, B, C, N, O, P, Q, R, S, T, and +:+, then ∠AOB=∠PQN ∵+, + ∠CAO=∠RSQ, ∠OCA=∠QRS, ∴ΔAOC∽ΔSQR, ∴∠AOC=∠ROS=∠AOB=∠PQN (6) Loosen the nut 17b and return the guide plate 18 to the gauge plate 16. Return to state, Natsu 17
Close b.

As explained above, according to this invention, a V-shaped recess with a 90° groove angle is formed at one end, a dimensional scale is attached to the surface of the recess along the plane of the recess, and the groove angle is 90°. A circular arc portion centered on the rotation center is provided on the opposite side of the recessed portion with respect to the rotation center provided on the bisector of A gauge plate, a pin provided at the center of rotation, and a guide plate rotatably attached to the gauge plate via the pin, and a guide plate is provided at a portion of the guide plate where the pin is attached. is provided with an elongated hole into which the pin is slidably fitted; an angle reading indicator for reading the angle scale is provided at one end of the guide indicator plate; and an angle reading indicator for reading the angle scale; The other end is characterized in that a flat part is formed along a direction perpendicular to the center line of the elongated hole and superimposed on the recessed part of the gauge plate, and the flat part is chamfered by one measuring device. The dimensions and angle of a part can be measured at the same time, which can significantly shorten measurement time, prevent fatigue of the measurer, and greatly improve work efficiency. .

[Brief explanation of drawings]

Fig. 1 shows how a chamfer is measured by a conventional chamfer measuring gauge, Fig. 2 shows how a chamfer is measured by a conventional protractor, and Fig. 3 shows an embodiment of this invention. Figure 4 is a front view of the chamfer measuring device, Figure 5 is a sectional view taken along the - line in Figure 4, and Figure 6 shows that the angle reading instruction section is on the chamfer. This is a diagram for proving that the angle is indicated by 16... Gauge plate, 17... Pin, 18... Guide instruction plate, 19... Recess, 19a... Bevel angle, 2
1...Circular arc part, 23...Dimension scale, 26...Angle scale, 27...Plane part, 28...Elongated hole, 30...
Angle reading instruction section (marked line).

Claims (1)

[Claims for Utility Model Registration] (1) A V-shaped recess with a groove angle of 90° is formed at one end, and a dimensional scale is provided on the surface of the recess along the plane of the groove, and the groove angle is 90°. A circular arc portion centered on the rotation center is provided on the opposite side of the recessed portion with respect to the rotation center provided on the bisector of A gauge plate, a pin provided at the center of rotation, and a guide plate rotatably attached to the gauge plate via the pin, and a guide plate is provided at a portion of the guide plate where the pin is attached. is provided with an elongated hole into which the pin is slidably fitted; an angle reading indicator for reading the angle scale is provided at one end of the guide indicator plate; and an angle reading indicator for reading the angle scale; A chamfer measuring instrument characterized in that a flat part is formed at the other end of the slot along a direction perpendicular to the center line of the elongated hole and overlapped with the recess of the gauge plate. (2) The scope of the utility model registration claim characterized in that the angle reading instruction section is located on the center line of a long hole formed in the guide instruction plate and is a marking line provided on the guide instruction plate. The chamfer measuring device according to item 1.