JPH0720503U - Eccentric work measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To support the shaft center of the eccentric work on the spindle side so that the outer diameter of the other eccentric shaft can be measured accurately. [Configuration] A device for inserting a work 10 between two measuring heads 16L and 16R and measuring a diameter D thereof,
A positioning guide 6 having a recess 6b having a width capable of fitting the eccentric shaft 10b of a work whose axial center O1 is rotatably positioned by the centers 17 on both sides is overlapped with the measuring heads 16L and 16R in the rotation axis direction. I placed it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for supporting one shaft center of an eccentric work and accurately measuring the outer diameter of the other eccentric shaft.

[0002]

[Prior art]

 In camshafts, crankshafts, etc., the eccentric shaft may be formed on the same shaft with respect to the main shaft of rotation to form another eccentric shaft. This eccentric shaft is manufactured by cutting with a lathe so that it has a specified dimension.When measuring whether the diameter of such an eccentric shaft is a specified value, Since the other shaft center is eccentric, the position of the eccentric shaft was not constant, and mechanical measurement was not possible, so calipers and micrometer were often used.

[0003]

[Problems to be solved by the device]

 As described above, measuring with a caliper or a micrometer is a very troublesome work for the operator, and it is time-consuming, and the work efficiency is very poor for mass production of the eccentric shaft. In addition, it is desirable to use a sensor to measure the diameter of the eccentric shaft because it can be measured in a short time, but it is desirable to support one shaft center, but the other shaft center will shift and become misaligned. It was not possible to measure. Therefore, the present invention seeks to configure the sensor so that the diameter can be easily measured by providing a simple guide member.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above, and in order to solve the problems, a device for inserting a work between two measuring heads and measuring the diameter thereof is provided. A guide member having a concave portion having a width into which the eccentric portion of the work, whose center is rotatably positioned, can be fitted is arranged so as to overlap the measuring head in the rotation axis direction.

[0005]

[Action]

 By using such a means, the work positioned at the center can be rotated around the shaft center, so when measuring the diameter of the eccentric shaft part, when the measuring head is fitted into the eccentric shaft of the work, it is guided at the same time. The concave part of the member is fitted into the eccentric shaft, and the guide member rotates by guiding so that the eccentric shaft center is aligned with the line connecting the above-mentioned shaft center and the center of the diameter measuring head. When the center of the eccentric shaft is aligned with the center of the measuring head without being abutted against the eccentric shaft by being protected by a member, the measuring head is brought into contact with the outer circumference of the eccentric shaft portion to accurately measure the diameter of the measuring head. Can be measured.

[0006]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. Fig. 1 is a front view of a measuring device for an eccentric work according to the present invention, Fig. 2 is a front view of a work and a guide member at the time of measurement, and Fig. 3 is a side view of the same. 4 is a side view showing a state immediately before measurement, and FIG. 5 is a perspective view showing the same.

In FIG. 1, a main frame 1 is supported so as to be able to move up and down by an outer diameter head transfer device arranged on a lathe, a cylinder 2 is arranged parallel to the main frame 1, and a base portion of the cylinder 2 is arranged. Is fixed to the outer diameter head transfer device, and the tip of the piston rod 2a is fixedly fixed to a stay 3 projecting in the middle of the main frame 1 so that the measuring device A can be moved up and down by expanding and contracting the cylinder 2. .

A support stay 4 is cantilevered on the upper end of the main frame 1 via a plate 5, and a positioning guide 6 shown in FIG. 2 is fixed to the tip of the support stay 4 so that the left and right positions can be adjusted. To this end, the support stay 4 is formed with long holes 4a, 4a that are long in the left-right direction, so that the positioning guide 6 and the support stay 4 can be fixed by bolts 7, 7, and the vertical center line of the positioning guide 6 can be fixed. Is adjusted so as to coincide with the center of the center 17 described later in the axial direction.

The positioning guide 6 is made of a plate material, and has guide pieces 6a, 6a protruding upwards on both sides to form a concave shape. The width of the guide piece 6a and the recess 6b inside the guide piece 6a is measured. The diameter of the concave portion 6b is set so that the work 10 can be inserted thereinto, and the inside of the tip of the guide piece 6a has an inclined portion 6c so that the work 10 can be easily guided and fitted into the concave portion 6b. It is provided.

A main body 12 of the measuring unit is fixed to the lower part of the main frame 1 via a bracket 11, and cylinders 13L and 13R are attached to both upper sides of the main body 12, and the cylinders 13L and 13R are attached to the main body 12. The piston rods 13La and 13Ra are projected upward, while the base arms 14L and 14R are projected laterally upward on the upper surface of the main body 12 so that the lower parts of the base arms 14L and 14R are inserted into the main body 12 and the lower ends thereof are inserted. The base arms 14L and 14R are fixed or pivotally supported, and the connecting arms 15L and 15R are fixed to the upper portions of the base arms 14L and 14R so as to project laterally, and the piston rods 13La of the cylinders 13L and 13R are attached to the ends of the connecting arms 15L and 15R.・ 13Ra is loosely fitted, and the cylinders 13L ・ 13R are contracted so that the base portion is connected via the connecting arms 15L ・ 15. The arms 14L and 14R are pulled to open to both sides.

An angle sensor or a distance sensor is provided in the main body 12 at each of the lower movable portions of the base arms 14L and 14R. The displacement of the angle sensor or the distance sensor can be detected. The measuring heads 16L and 16R are fixed to the upper ends of the base arms 14L and 14R, and the upper portions thereof are located at the rear portions of the guide pieces 6a and 6a of the positioning guide 6 in the axial direction. They are arranged so that they overlap.

On the other hand, as shown in FIGS. 2 and 5, the work 10 is a case in which main shafts 10 a and 10 a are formed on both sides and an eccentric shaft 10 b is formed in the central portion. The centers of the spindles 10a, 10a on both sides in the axial direction are supported by the centers 17, 17 of the tailstock, and the measuring device A is arranged in the direction perpendicular to the axial center of the workpiece 10 to measure the diameter of the eccentric shaft 10b. I am trying.

That is, in order to measure the diameter of the eccentric shaft 10b of such a work 10, first, with respect to the work 10 in which the centers O1 at both ends of the main shafts 10a and 10a are supported by the centers 17 and 17, Positioning the measuring device A away from the work 10 and reducing the cylinders 13L and 13R provided on the side of the main body 12 as shown in FIGS. 4 and 5, the base arms 14L and 14R and the measuring heads 16L and 16R. Then, when the cylinder 2 is extended and the main frame 1 is lifted, the line L2 connecting the center O1 of the main shaft 10a of the work 10 and the center O2 of the eccentric shaft 10b of the work 10 is aligned with the positioning guide 6 as shown in FIG. Even when it does not coincide with the center line L1, the work 10 is inserted into the recess 6b of the positioning guide 6 so that the eccentric shaft 10b rotates and the center O2 of the eccentric shaft 10b becomes centered. The line L2 connecting the hearts O1 comes to coincide with the center line L1 of the measuring heads 16L and 16R, and the rising is stopped at the position of FIG. 2, the cylinders 13L and 13R are extended, and the base arms 14L and 14R are closed. When the measuring heads 16L and 16R are brought into contact with the outer circumference of the eccentric shaft 10b, the rotation angle of the base arms 14L and 14R is detected by the sensor provided in the main body 12, and the diameter of the eccentric shaft 10b is measured from the detected angle. You can do it.

[0014]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. That is, when measuring an eccentric work, the eccentric shaft rotates around the sensor axis, which allows easy positioning in the measurement posture and accurate diameter measurement, and a guide member for positioning. Will also protect the measuring head, and the measuring head will not be damaged during measurement.

[Brief description of drawings]

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

FIG. 2 is a front view of a work and a guide member during measurement.

FIG. 3 is a side view of the same.

FIG. 4 is a side view showing a state just before measurement.

FIG. 5 is a perspective view of the same.

[Explanation of symbols]

 A Measuring device 6 Positioning guide 6b Recess 10 Workpiece 16 Measuring head 17 Center

Claims (1)

[Scope of utility model registration request] 1. A device for measuring a diameter of a work by inserting the work between two measuring heads, the width of which is such that an eccentric portion of the work whose axial center is rotatably positioned at both centers can be fitted. A measuring device for an eccentric work, wherein a guide member having a recess is arranged so as to overlap the measuring head in the direction of the rotation axis.