JPH0626801Y2 - Simple position measuring device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a simple position for determining the quality of a work by detecting the mold deviation of the projection protruding radially outward on the outer periphery of the work and the protruding position. Degree measuring device.

The simple position measuring device of the present invention is a casting product, a manufacturing product, an injection molding product, in which a mold deviation may occur in the thickness direction of the protrusion of the work in order to mold the work by clamping the molding die. For example, it is effective in determining the quality of a work such as an import joint used in a constant velocity joint.

[Prior Art] For example, an import joint is known as a work projecting radially outward in the outer peripheral portion. In determining the degree of position of the import joint and the quality of the mold deviation, conventionally, as shown in FIG. 10, a protrusion W10 separated from the center of the work W by a predetermined dimension D3 by a three-dimensional measuring device or the like.
The reference points G1 and G2 of the workpiece W and the axis M1 of the workpiece W
The dimension D1 between the center line P1 passing through and the reference point G1 is measured, and the dimension D2 between the reference point G2 and the center line P1 is measured.

However, since there are three measurement dimensions D1, D2, and D3, measurement errors tend to be added, and there is a problem that it is difficult to obtain the required measurement accuracy. Further, in order to obtain the position degree of the protrusion W10 of the work W, the dimensions D1, D2, D
3 must be calculated and cannot be measured directly. Therefore, it is necessary to further improve the measuring means used in the field, which requires time to determine the quality of the protrusion W10 of the work W and is required to be used quickly and easily.

Further, conventionally, a measuring device disclosed in Japanese Utility Model Laid-Open No. 56-97701 has been provided. This measuring device is a ball center measuring device for measuring a distance from a reference surface of a workpiece having a spherical shape to a ball center position. In this measuring device, a fixed ball and a movable ball are brought into contact with a spherical surface of a master, which is a prototype having a regular shape and dimensions, and the position of the movable ball at this time is used as a reference value. Then, in determining the quality of the work that is an actual product, the fixed ball and the movable ball are brought into contact with the spherical surface of the work,
The quality of the work is determined by measuring the movement amount of the movable ball and detecting the difference between the reference value and the movement amount.

[Problems to be Solved by the Invention] The present invention is directed to the above-mentioned measuring device for measuring and calculating the dimensions D1, D2, and D3 in order to obtain the degree of position of the protrusion of the work, and further, fixed balls and movable balls. A measuring device of a system different from the measuring device of Japanese Utility Model Laid-Open No. 56-97701 is used.

An object of the present invention is to hold a pair of measuring elements having a V-shaped contact groove so as to be able to move forward and backward with respect to a work,
A simple position degree measuring device capable of easily determining the quality of a projecting part of a work having a projecting part projecting radially outward on the outer peripheral part by holding the pair of measuring elements swingably. To provide.

[Means for Solving the Problems] A simple position measuring device of the present invention is a work holding part for holding a work having a protrusion projecting radially outward on an outer peripheral part, and a thickness direction of the work protrusion at the tip. Of the first measuring element having a V-shaped contact groove that abuts on one half of the V shape, and a V shape having the same shape as the V-shaped contact groove of the first measuring element that abuts on the other half in the thickness direction of the protrusion of the work piece at the tip. While holding both the second measuring element having the character-abutting groove and the first measuring element and the second measuring element so that they can be moved forward and away from the work, the first measuring element and the second measuring element are held toward the work held by the work holding portion. A tracing stylus holding part for swingably holding at least one of the tracing stylus and the second tracing stylus so as to swing around the workpiece about the axis of the workpiece held by the workpiece holding part; The first probe and the second probe in the direction in which the
It is characterized in that it is configured by a detection unit that detects the relative displacement amount of the tracing stylus and determines the quality of the work.

The work holder is preferably rotatable so that the work can be rotated in its circumferential direction. The work held by the work holding portion may be any work that has a protrusion projecting radially outward on the outer peripheral portion. For example, an import joint used in a constant velocity joint, a gear with external teeth, etc. can do.

A dial gauge, a caliper, or the like can be used as the detection unit in consideration of easy measurement.

[Operation] In the simple position measuring apparatus of the present invention, the V-shaped contact groove of the first probe is abutted against the half of the protrusion of the workpiece in the thickness direction,
The V-shaped contact groove of the probe contacts the half of the protrusion of the workpiece in the thickness direction. Then, the quality of the protrusion of the work is determined by the amount of deviation between the first and second measuring elements.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

The work W measured by the simple position measuring apparatus of this embodiment is an import joint. The simple position measuring apparatus of the present embodiment includes a work holding unit 1, a first probe 2, a second probe 3, a probe holder 4, and a detector 5.

As shown in FIG. 1, the work holding unit 1 holds a work W having a projection W10 that projects radially outward in the outer peripheral portion in the horizontal direction. The work holding unit 1 includes a rotating unit 10 which can rotate horizontally in the circumferential direction of the work W and can be fixed at a predetermined rotation position, and three sets of clamp claws arranged on the rotating unit 10 for holding the work W. 11 and a bolt 12 for fixing the rotary unit 10 to the reference position. Here, the work W is primarily positioned by the rotating unit 10 and finally positioned by the clamp claw 11.

As shown in FIG. 1, the work W is attached to the tip of the first probe 2.
A V-shaped V-shaped contact groove 20 that contacts the upper half of the protrusion W10 in the thickness direction is formed. An escape groove 20a is formed in the V-shaped contact groove 20.

As shown in FIG. 2, a V-shaped contact groove 30 having the same shape as the V-shaped contact groove 20 of the first probe 2 is formed at the tip of the second probe 3. The V-shaped contact groove 30 of the second tracing stylus 3 is in contact with the other half of the protrusion W10 of the work W in the thickness direction, that is, the lower half. As shown in FIG. 5, a plurality of spherically concave ball receiving portions 21 are formed on the first tracing stylus 2, and slide balls 22 and 2 are formed in each ball receiving portion 21.
3 are held respectively. Second as shown in FIG.
A ball receiving portion 31 is similarly formed on the tracing stylus 3, and slide balls 32 and 33 are held in the ball receiving portion 31.

The tracing stylus holder 4 is a ball slide type first tracing stylus 2.
The second probe 3 is held so as to be able to move forward and backward and swing. In the present embodiment, the probe holder 4
Is a fixed base 40, as shown in FIG. 1 and FIG.
Guide stand 42 arranged on the fixed stand 40 and having a guide surface 41
And the movable portion 44 that moves away from the work W, that is, in the direction opposite to the arrow A that advances toward the work W in the direction of arrow A, and is operated when moving the movable part 44 forward or away. Move the handle 45 and the movable part 44 to the arrow A
And a spring 47 for biasing in the direction. As shown in FIG. 7, a slide ball 48 is interposed between the guide base 42 and the movable base 44 to secure the mobility of the movable portion 44.

Further, as shown in FIG. 1, a guide plate 49 is arranged at the tip of the movable portion 44. As shown in FIG. 5, the guide plate 49 has an arc shape bent at a predetermined radius r around an axis W2 which is a rotation center of the work W held by the work holding portion 1. . Then, as shown in FIGS. 5 and 6, the guide plate 49 is sandwiched by the slide balls 22 and 23, and as a result, the first probe 2 is held at the tip of the movable portion 44. Therefore, as shown in FIG. 5, when an external force acts on the first probe 2 in the direction of arrow B, the slide balls 22 and 23 roll along the guide plate 49, so that the first probe 2 holds the workpiece. The workpiece W held by the portion 1 can be swung in the circumferential direction, that is, in the arrow B direction around the axis W2 that is the rotation center. The second probe 3 has the same mechanism. That is, as shown in FIG. 2, since the slide balls 32 and 33 roll along the guide plate 49 provided on the movable portion 44, the second tracing stylus 3 also has the guide plate 49 centered on the axis W2 of the workpiece W. It is possible to swing in the direction of arrow B along 49.

The detection unit 5 is fixed to a dial plate holder 50 fixed to the second tracing stylus 3, a dial gauge 51 held by the dial gauge holder 50, and an unillustrated surface plate equipped with the tracing stylus holding unit 4. Dial gauge holder 52
And a dial gauge 53 held on a surface plate (not shown) via a dial gauge holder 52. The tip end of the detection rod 51a of the dial gauge 51 is urged against and comes into contact with the side surface of the first probe 2 by a spring built in the dial gauge 51. Similarly, dial gauge 53
The tip end portion of the detection rod 53a is biased by the spring incorporated in the dial gauge 53 to the contact portion 25 on the side of the first tracing stylus 2 and is in contact therewith. Here, when the first probe 2 and the probe 3 shown in FIG. 3 are both displaced in the direction of the arrow A and approach the work holding unit 1, the displacement amount is the scale pointed by the needle of the dial gauge 53. Detected by. When the first probe 2 and the second probe 3 are relatively displaced in the circumferential direction of the work W, that is, in the direction of the arrow B, the displacement amount is detected by the scale pointed by the needle of the dial gauge 51. It

Now, the case of using the simple position measuring device will be described together with its operation. First, the master W3, which is a prototype having a regular shape and dimensions, is used to hold the master W3 in the work holding unit 1, and the protrusion W10 of the master W3 is set to the reference position of the work holding unit 1. Then, in that state, the handle 45 is operated to move the movable portion 44 of the tracing stylus holder 4 forward in the direction of arrow A, that is, toward the workpiece holder 1, whereby the V-shaped measuring groove of the first tracing stylus 2 is moved. 20 is brought into contact with the upper half of the protrusion W10 of the master W3, and the V-shaped contact groove 30 of the second probe 3 is brought into contact with the lower half of the protrusion W10 of the master W3. In the case of the master W3, which is a prototype having a regular shape and dimensions, there is substantially no shift amount between the first probe 2 and the second probe 3 in the direction of arrow B.
The needle of the dial gauge 51 indicates the scale 0.

Next, the clamp claw 11 is removed, the master W3 is removed from the work holding part 1, the work holding part 1 is held, and the work W, which is an actual casting or crepe product, is held in the work holding part 1 by the clamp claw 11. The protrusion W10 of the workpiece W is set to the reference position of the workpiece holder 1. In this state, the needle 51 of the dial gauge indicates the scale "0", as shown in part in FIG. The first probe 2 and the second probe 3 are workpieces W
Because it is not in contact with.

Then, in that state, the handle 45 is pressed to move the movable portion 44 of the tracing stylus holding portion 4 forward in the direction of arrow A, that is, toward the workpiece holding portion 1, whereby the V-shaped contact of the first tracing stylus 2 is made. The contact groove 20 is brought into contact with the upper half of the protrusion W10 of the work W, and the V-shaped contact groove 30 of the second probe 3 is brought into contact with the lower half of the protrusion W10 of the work W.

At this time, the first probe 2 and the second probe 3 are urged by the urging force of the spring 47 to the protrusion W10 of the work W and are in close contact with each other.

By the way, when the mold deviation occurs between the upper half and the lower half of the protrusion W10 of the work W, the first probe 2 and the second probe 3 are relatively displaced by an amount corresponding to the displacement. To do. That is, when the upper half and the lower half of the protrusion W10 of the work W in the thickness direction are deviated in the circumferential direction of the work W (direction of arrow B), the first probe 2 and the second probe 3 are There is relative displacement in the circumferential direction of W, and the relative displacement amount is quantitatively detected by the needle of the tire gauge 51. The relative displacement of the first probe 2 and the second probe 3 in the direction of arrow B is smoothly performed by rolling the slide balls 22 and 23 and the slide balls 32 and 33.

When the measurement of one protrusion W10 is completed in this way,
The handle 45 of the tracing stylus holder 4 is operated to retract the movable portion 46 so as to separate from the workpiece holder 1, and the first tracing stylus 2 and the second tracing stylus 3 are released from the workpiece W. Then, the first tracing stylus 2 and the second tracing stylus 3 are aligned so as to match with each other, and the needles of the dial gauges 51 and 53 indicate the scale "0".

In addition, when the movable portion 44 is retracted, if the not-shown locking claw formed on the handle 45 is locked, the movable portion 4 is moved.
4 is held in a state of escaping from the work W.

Next, when measuring a protrusion W11 different from the protrusion W10 of the work W, the bolt 12 is loosened or removed, and in that state, the rotation unit 10 of the work holding unit 1 is rotated to cause another protrusion. Set W11 to the reference position. Then, similarly to the above, the handle 45 is operated to operate the movable portion 4 of the probe holder 4.
4 in the direction of arrow A, that is, toward the work holding portion 1, thereby bringing the V-shaped contact groove 20 of the first probe 2 into contact with the upper half of the protrusion W11 of the work W and performing the second measurement. The V-shaped contact groove 30 of the child 3 is brought into contact with the lower half of the protrusion W11 of the work W. Then, the quality of another protrusion W11 is quantitatively determined by the scale pointed by the needle of the dial gauge 51.

As described above, in this embodiment, the protrusion W1 of the work W is
It is possible to easily detect the amount of deviation in the circumferential direction (the direction of arrow B) between the upper half and the lower half in the thickness direction such as 0 and W11.

Another embodiment of the present invention is shown in FIGS. This embodiment is basically the same as the above-mentioned embodiment. However, in the case of this embodiment, the measurement holding unit 6 is
The holding part 60, the second holding part 61 arranged between the first holding parts 60, the third holding part 62 arranged between the second holding parts 61, the first holding part 60 and the first holding part 60. The rolling ball 63 is interposed between the second holding portion 61 and the second holding portion 61, and the rolling ball 64 is interposed between the second holding portion 61 and the third holding portion 62. The first tracing stylus 2 is arranged in the third holding portion 62 via an elastically contractible spring 65. Further, the second measuring element 3 is arranged in the second holding portion 61 via an elastically contractible spring 65. In the embodiment shown in FIG. 8 and FIG. 9 as well as the above-mentioned embodiment, the slide balls 22 and 23 are held by the first probe 2,
A guide plate 49 is provided on the third holding portion 62. Further, the slide balls 32 and 33 are held by the second probe 3, and the guide plate 49 is provided on the second holding portion 61.

Here, when an external force acts on the first probe 2 and the second probe 3 in the arrow B direction, the spring 65 elastically deforms, and
Since the slide balls 22 and 23 roll along the guide plate 49 and the slide balls 32 and 33 roll along the guide plate 49, the first probe 2 and the second probe 3 swing in the circumferential direction. It is possible to

In the embodiment shown in FIGS. 8 and 9, the second holding portion 61
Can be moved in the direction of arrow A with respect to the first holding portion 60 by the rolling of the rolling roller 63, whereby the second
The second tracing stylus 3 held by the holder 61 can be moved forward or away from the work W. Third
The holding portion 62 can be moved in the direction of arrow A with respect to the second holding portion 61 by the rolling of the rolling roller 64, whereby the first tracing stylus 2 held by the third holding portion 62 is The workpiece W can be moved forward or separated from the workpiece W.

As shown in FIG. 9, the detection unit 7 includes a backing plate 70 fixed to the first holding unit 60, a dial gauge 72 held by the second holding unit 61 and a detection rod 71 contacting the backing plate 70, The backing plate 73 fixed to the second holding portion 61 and the third holding portion 6
2 is provided with a dial gauge 75 with which the detection rod 74 abuts against the contact plate 73. Further, the tip of the detection rod 78 comes into contact with the first probe 2, and the tip of the detection rod 80 is provided with a dial gauge 77. The second gauge head 3 is provided in contact with the dial gauge 79. The dial gauge 77 is the second
It is held by the probe 3, and the dial gauge 79 is held by the first holding portion 60.

In this embodiment, the second holding portion 6 with respect to the first holding portion 60.
The relative movement amount of 1 is detected by the scale of the needle of the dial gauge 72. The relative movement amount of the third holding portion 62 with respect to the second holding portion 61 is detected by the scale of the needle of the dial gauge 75.

The relative displacement amount of the first probe 2 with respect to the second probe 3 in the arrow B direction is detected by the dial gauge 77. The amount of deviation of the second probe 3 in the direction of arrow B is detected by the dial gauge 79.

Also in this embodiment, the same effect as in the case of the above-described embodiment can be obtained, and by the operation of bringing the first and second measuring elements 2 and 3 into contact with the protrusion W10 of the work W, the protrusion W10 of the work W Circumferential direction between upper half and lower half in the thickness direction (arrow B
The deviation in the direction) and the deviation in the radial direction (direction of arrow A) between the upper half and the lower half of the work W in the thickness direction can be easily detected.

In the above-described embodiment, both the first probe 2 and the second probe 3 are configured to oscillate about the axis W2 of the work W, but instead of this, one of them is a non-oscillation type. May be

[Effects of the Invention] According to the simple position measuring device of the present invention, the half and the other half of the protrusion of the work in the thickness direction can be achieved by the operation of abutting the first probe and the second probe on the protrusion of the work. It is possible to easily detect the deviation in the circumferential direction from and.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a first probe and a second probe.
FIG. 4 is a schematic plan view of a state before abutting the gauge head, FIG. 4 is a schematic plan view of a state after abutting the first gauge head and the second gauge head, and FIG. Partial schematic plan view, part 6
FIG. 7 is a schematic side view of the main part of the first probe, and FIG. 7 is a sectional view schematically showing the movable mechanism of the movable part. 8 and 9 show another embodiment of the present invention.
The figure is a plan view and FIG. 9 is a side view. FIG. 10 is an explanatory view showing the measuring means of the conventional device. In the figure, 1 is a work holding part, 10 is a rotation unit, 2 is a first measuring element, 20 is a V-shaped contact groove, 22 and 23 are slide balls, 3 is a second measuring element, and 30 is a V-shaped contact groove. , 32, 33
Is a slide ball, 4 is a probe holder, 44 is a movable table,
Reference numeral 45 is a handle, 49 is a guide plate, and 5 is a detector.

Claims (1)

[Scope of utility model registration request] 1. A work holding portion for holding a work, which has a projection protruding radially outward on an outer peripheral portion, and a V-shaped contact groove for contacting with a half of the projection in the thickness direction of the work at the tip. A first measuring element; and a second measuring element having a V-shaped contact groove which is in contact with the other half of the protrusion of the work in the thickness direction and has the same shape as the V-shaped contact groove of the first measuring element. A measuring element and both the first measuring element and the second measuring element are held so that they can be moved forward and away from the work toward the work held in the work holding portion, and the first measuring element And at least one of the second probe,
A tracing stylus holding part that holds the work held by the work holding part so as to swing around the work center around the axis of the work, and the first one in a direction in which the one swings. A simple position degree measuring device comprising: a measuring element and a detecting section that detects a relative deviation amount of the second measuring element and determines whether the work is good or bad.