JP2960219B2 - Outer diameter measuring device for tapered workpiece - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the outer diameter of a tapered workpiece, and more particularly, to a method for measuring the outer diameter of a tapered workpiece by continuously transporting the tapered workpiece after finishing the outer diameter surface grinding process. The present invention relates to an outer diameter measuring device for performing high-speed scanning with light for measurement.

[0002]

2. Description of the Related Art A tapered workpiece having a tapered outer peripheral surface is
In general, after continuous grinding by through-feed grinding using a centerless grinding machine or the like, the finished outer diameter of the outer peripheral surface is measured.Conventionally, among the tapered workpieces that have completed these grinding processes, A method has been adopted in which some are appropriately extracted and measured with a gauge.

[0003]

However, the work of measuring the outer diameter using such a gauge is very troublesome and time-consuming, impairs the smooth flow of the production process in a large-volume production site, and furthermore, the measurement by sampling requires a total number of operations. Inspection was not possible, and the possibility that defective products outside the allowable outer diameter dimensions were included in the product could not be avoided. In this regard, an example
For example, as disclosed in Japanese Utility Model Application Laid-Open No. 62-186809.
Various outside diameter measuring devices have been proposed. This measuring device is a circle
Workpieces that are conveyed by vibrating a cylindrical workpiece by a straight feeder
Is transferred to the transport member by escapement, and
A fixed pitch of the transferred workpiece with a walking beam
While transferring sequentially at intervals, during the transfer,
The instrument is configured to measure the outer diameter with a measuring instrument.
According to the equipment described in
100% inspection is possible without compromising the flow. Only
However, in such a device configuration, the outer diameter dimension is in the length direction (axial direction).
Direction) Only for measuring the outer diameter of the same cylindrical workpiece over its entire length
It can be used, and the outer diameter extends over the entire length.
Used to measure the outer diameter of a tapered workpiece that changes continuously
could not. That is, for tapered workpieces,
The outer diameter of the
Therefore, when measuring the outer diameter,
It is necessary to measure the outer diameter at one measuring posture and at the same axial position
Where there is such an outside diameter measuring device, such measurement
Positioning the measurement posture and measurement position of the workpiece at the location
No means for measuring the outside diameter of tapered workpieces
Could not be applied.

The present invention has been made in view of the above-mentioned conventional problems, and automatically measures the outer diameters of all the tapered workpieces whose outer peripheral surfaces have been ground by a laser measuring device during the transportation thereof. It is an object of the present invention to provide a taper workpiece outer diameter measuring device capable of continuously measuring.

[0005]

In order to achieve the above object, an outside diameter measuring apparatus according to the present invention is provided with a conveying device for conveying a tapered workpiece through a measuring position, and provided at the measuring position. A guide device for adjusting the measurement posture of the tapered workpiece received from the transfer device, and a positioning device for moving the tapered workpiece riding on the guide device forward to position the tapered workpiece at a measurement reference position. A laser measuring device for scanning and measuring the outer diameter of the tapered workpiece at the measurement reference position with a laser beam ,
The transporting device includes left and right ones arranged in parallel at a predetermined interval.
In the case of a belt conveyor consisting of a pair of belts
In addition, the interval between the inner edges of both belts is at least
It is set narrower than the outer diameter of the center of the tapered workpiece
And said that you are.

[0006]

In the outer diameter measuring device according to the present invention, the predetermined interval
A belt consisting of a pair of left and right belts
A conveyor in the form of a belt conveyor continuously conveys a tapered work piece whose outer peripheral surface has been ground by a centerless grinder or the like at predetermined intervals with its tapered side directed in the conveying direction. In this case, the inner edges of the pair of left and right belts
The spacing between them is at least outside the center of the tapered workpiece.
It is set narrower than the diameter, and the tapered workpiece
With the outer peripheral surface supported by the inner edges of both belts
Conveyed.

[0007] At the measurement position in the middle of the transfer of the transfer device, the guide device in a stopped state receives the tapered workpiece from the transfer device and adjusts its measurement posture.

Subsequently, when the positioning device moves the tapered workpiece riding on the guide device forward and positions it at the measurement reference position, the laser measuring instrument converts the outer diameter of the tapered workpiece into laser light. Scan and measure.

The tapered workpiece whose outer diameter has been measured is pushed forward by the subsequent tapered workpiece in the transport direction, is moved again from the guide device to the transport device, and is transported to a predetermined unloading position. .

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Example 1

FIGS. 1 and 2 show an outer diameter measuring apparatus for a tapered workpiece according to the present invention. The outer diameter measuring apparatus is arranged continuously on the discharge side of a centerless grinding machine or the like which performs through feed grinding. Transport device 1 for transporting a tapered workpiece W
A guide device 2 for adjusting the measurement posture of the tapered workpiece W received from the transfer device 1, a positioning device 3 for positioning the tapered workpiece W on the guide device 2 at a measurement reference position P, and a measurement reference position And a laser measuring device 4 for measuring the outer diameter D of the tapered workpiece W at P.

The transport device 1 is, specifically, a belt conveyor composed of a pair of left and right thin steel belts 5 and 5 (thickness 1 mm or less) arranged in parallel at a predetermined interval. In this way, by using the thin steel belts 5 and 5 as the belt conveyor, scanning measurement by the laser measuring device 4 described later becomes possible.

The feed speed of the belt conveyor is set earlier than the work cycle time of the grinding machine or the like, whereby tapered workpieces W, W,. Are conveyed in the direction of arrow A at regular intervals.

The inner edge 5 of the steel belts 5, 5
a, the interval w ₁ between 5a is set smaller than the outer diameter of the axially central portion of at least the tapered workpiece W. Thus, as shown in FIG. 3, the tapered workpiece W has its lower outer peripheral surface formed on the inner edges 5a, 5a of the steel belts 5, 5.
While being supported by 5a, the paper is conveyed in the posture shown in FIG. 2, that is, with the tapered side facing the conveyance direction.

The guide device 2 includes a guide member 6 provided at a measurement position in the middle of the transfer of the transfer device 1 and inclined upward with respect to the transfer direction A of the transfer device 1.

The guide member 6 comprises a pair of right and left work guide bars 7, 7 arranged in parallel.
These sequences interval w ₂ is set smaller than the front end outer diameter, i.e. the minimum outer diameter of the tapered workpiece W, the inside portions of both work guide bars 7 to support and guide the lower peripheral surface of the tapered workpiece W A guide groove is formed.

[0017] The arrangement interval w ₂ also includes an inner edge 5a of the steel belt 5,5, narrower than the interval w ₁ of 5a, the two work guide bars 7, as shown in FIG. 2, the steel Between the belts 5, 5, they are provided in a cross shape from the lower side to the upper side.

The inclination angle of the work guide bars 7, 7 is set so as to be inclined by the taper angle with respect to the axis X of the tapered workpiece W, and the inclination angle is determined by the taper of the tapered workpiece W to be handled. It can be adjusted appropriately according to the angle.

When the tapered workpiece W conveyed by the steel belts 5, 5 reaches the measurement position, it rides on the work guide bars 7, 7, as shown in FIG. , 5 is released, and at the same time, the posture is adjusted such that the axis X is horizontal as shown in FIG.

As shown in FIG. 1, the positioning device 3 is provided on one side of the transfer device 1, and has a pressing member 8 for pressing the tapered workpiece W in the transfer direction A, and a driving device for driving the pressing member 8. It comprises a motor 9 and a stop member 10 for stopping the tapered workpiece W.

The pressing member 8 is supported by a guide bar 11 so as to be movable in the front-rear direction. The guide bar 11 is provided extending in the transport direction A in parallel with the steel belt 5. The front end 8a of the pressing member 8 is provided to extend forward on the center line between the steel belts 5 and 5, and the rear end 8b is connected to the drive shaft 9a of the drive motor 9 via the cam mechanism 12. It is connected to.

The cam mechanism 12 is, specifically, in the form of a crank mechanism as shown in FIG. 5, an eccentric shaft 12a of a disk fixed to a drive shaft 9a of a drive motor 9, and a pressing member 8
A connecting shaft 12b provided at the rear end portion 8b of the vehicle, and a connecting arm 12c having both ends pivotally supported by the connecting shaft 12b. And
With the rotation of the eccentric shaft 12a by the drive motor 9, the pressing member 8 reciprocates within the range of the movement stroke S in parallel with the transport direction A via the connecting arm 12c.

The stop member 10 is made of a spring plate material.
The work guide bars 7 are provided on the left and right sides of the work guide bar 7, respectively. The work guide bars 7, 7 are engaged with the tapered work W passing between the two stop members 10 in a sandwiching manner from both the left and right sides. It acts to stop it elastically.

When the pressing member 8 moves forward in the transport direction A, the front end portion 8a presses the rear end surface of the tapered workpiece W and moves it forward on the work guide bars 7,7. At the same time, at the forward end position of the tip 8a, the tapered workpiece W cooperates with the stop members 10, 10.
At the measurement reference position P. The stop time of the tapered workpiece W at the measurement reference position P is determined by the reciprocating time of the pressing member 8, that is, the time until the subsequent tapered workpiece W reaches the measurement reference position P. In the example, it is set to about 0.5 seconds.

The laser measuring device 4 continuously measures the outer diameter of the tapered workpiece W at the measurement reference position P in a non-contact state with a laser beam. For example, a US laser microphone is preferably used.

That is, the laser measuring device 4 applies a thin linear laser beam LB to the tapered workpiece W from the direction perpendicular to the transport direction A in the measurement outer diameter portion (from the measurement reference position P in FIG. 2). (The portion having the dimension H), and the outer diameter thereof is scanned at high speed.

Correspondingly, the work guide bars 7, 7 are cut off 7a at a portion corresponding to the lower outer diameter portion of the tapered workpiece W on the lower side of the measuring portion, ie, a portion through which the laser beam LB passes. I have.

Next, an operation of measuring the outer diameter of the tapered workpiece W by the outer diameter measuring device having the above-described configuration will be described.

The tapered workpiece W for which the outer peripheral surface grinding by the centerless grinding machine or the like has been completed is continuously discharged onto the steel belts 5 and 5 of the transport device 1, and the tapered side thereof is directed in the transport direction A. Conveyed by.

In this case, since the steel belts 5, 5 run at a feed speed faster than the work cycle time of the above-mentioned centerless grinding machine or the like, each tapered workpiece W, W is shown in FIG. 1 and FIG. As described above, the paper is conveyed at a constant interval corresponding to the speed difference between the two.

The tapered workpiece W transported to the measurement position by the transport device 1 rides on the work guide bars 7, 7 of the guide device 2, and the posture thereof is adjusted.

That is, the work guide bars 7, 7
Is set so as to be inclined by the taper angle with respect to the axis X of the tapered workpiece W, and the steel belts 5, 5
The tapered workpiece W rides on the work guide bars 7, 7 and is released from the support state by the steel belts 5, 5 because the tapered workpiece W is provided in a cross shape from the lower side to the upper side (see FIG. 4). At the same time, the posture is adjusted so that the axis X is horizontal (see FIG. 2).

The tapered work piece W riding on the work guide bars 7, 7 is positioned at the measurement reference position P by the positioning device 3.

That is, with the forward movement of the pressing member 8 of the positioning device 3, the tapered workpiece W is pushed forward by the rear end face thereof being pressed by the distal end portion 8a of the pressing member 8, and the forward end of the distal end portion 8a is advanced. At the position, it is stopped at the measurement reference position P. In this case, the stop member 10,
Since the braking force is always applied by 10, the tapered workpiece W is accurately positioned at the measurement reference position P and is held at this position.

The outer diameter of the tapered workpiece W positioned at the measurement reference position P is measured by the laser measuring device 4 (a portion having a dimension H from the measurement reference position P). That is, as shown in FIG. 4, the laser measuring device 4 always makes the thin linear laser light LB incident on the tapered workpiece W,
The outer diameter is scanned at high speed (350 to 600 times per second), and the outer diameter is automatically measured. This measurement time is about 0.3 seconds to 0.5 seconds.

The tapered workpiece W whose outer diameter has been measured
Is pushed in the transport direction A by the subsequent tapered workpiece W, moves forward, is again moved from above the work guide bars 7, 7 onto the steel belts 5, 5, and is transported to a predetermined carry-out position. And defective products. At the same time, a ± correction value based on the measurement result is fed back to the outer diameter measuring device.

Embodiment 2 This embodiment is shown in FIG. 6, and measures the taper by measuring the outer diameter of the tapered workpiece W at two places.

That is, in the present embodiment, the positioning device 3
The pressing member 8 performs motion in two stages during forward forward in the transport direction A, first, after positioning the tapered workpiece W to the first measurement reference position P ₁ (approximately 0.5 seconds), the the second measurement reference position P ₂ at the forward end position is configured to position the tapered workpiece W.

The tapered workpiece W conveyed to the measurement position is located at the first measurement reference position P ₁ at the tip end side thereof (a portion having the dimension H ₁ from the measurement reference position P ₁ ).
Outer diameter D ₁ is measured by the laser measuring device 4, followed by the second measurement reference position P _2, the outer diameter D ₂ laser of its rear end position (site of measurement reference position P ₂ from the dimension H ₂₎ of It is measured by the measuring device 4 and finally these two outer diameters D ₁ ,
And D ₂ from the dimension L between the two, so that the taper of the tapered workpiece W is measured. Other configurations and operations are the same as those of the first embodiment.

The present invention is not limited to the above-described first and second embodiments, but can be variously modified.
In particular, the specific structures of the transport device 1, the guide device 2, the positioning device 3, and the laser measuring device 4 which are the respective components of the outer diameter measuring device are not limited to the illustrated examples, and the same functions as those described above are provided. The design can be changed as appropriate within the range.

[0041]

As described in detail above, according to the present invention,
A transport device for transporting the tapered tapered workpiece through the measurement position, a guide device provided at the measurement position, for adjusting a measurement attitude of the tapered workpiece received from the transport device, and A positioning device that moves the tapered workpiece on the vehicle forward and positions the tapered workpiece at a measurement reference position; and a laser that scans and measures the outer diameter of the tapered workpiece at the measurement reference position with a laser beam. And a measuring device , wherein the transport device is provided at a predetermined interval.
Belt control consisting of a pair of left and right belts arranged in parallel
In the form of a bear, the inner edges of both belts
The spacing between them is at least outside the center of the tapered workpiece
Since the diameter is set smaller than the diameter, the outer diameters of all the tapered workpieces whose outer peripheral surface has been ground can be automatically and continuously measured by the laser measuring device during the transportation.

That is, the tapered work piece whose outer peripheral surface has been ground by a centerless grinding machine or the like is turned by the transfer device with its tapered side directed in the transfer direction and its lower outer circumferential surface raised.
After being continuously conveyed at a predetermined interval while being supported by the inner edges of the two belts, the belts are transferred to a guide device at a measurement position and the measurement posture is adjusted. Further, the tapered workpiece riding on the guide device is positioned at the measurement reference position by the positioning device, and the outer diameter thereof is scanned and measured by the laser measuring device, and then, in the transport direction by the subsequent tapered workpiece. It is pressed, moved again from the guide device to the transport device, and transported to a predetermined unloading position.

Therefore, the outer diameters of all tapered workpieces for which the outer peripheral surface grinding has been completed are measured in a short time during the transportation (in the embodiment, 0.3 seconds to 0.5 seconds for each workpiece). Second), and there is no possibility that the smooth flow of the production process in a mass production site is impaired at all. Incidentally, according to the apparatus of the embodiment, 100 to 1 per minute
Outer diameter measurement of 50 tapered workpieces is possible.

In addition, since the measurement is performed on all tapered workpieces instead of the measurement by sampling as in the conventional method, it is possible to completely avoid the possibility that defective products having an outside diameter outside the allowable outer diameter are included in the product. it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an outer diameter measuring device for a tapered workpiece according to a first embodiment of the present invention.

FIG. 2 is a side view showing a main part of the outer diameter measuring device.

FIG. 3 is a cross-sectional view of the outer diameter measuring device taken along line III-III in FIG. 2;

FIG. 4 is a sectional view of the outer diameter measuring device taken along line IV-IV in FIG. 2;

FIG. 5 is an enlarged side view showing a cam mechanism of a pressing member of the positioning device of the outer diameter measuring device.

FIG. 6 is a side view showing a main part of an outer diameter measuring device for a tapered workpiece according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conveying device 2 Guide device 3 Positioning device 4 Laser measuring device 5 Steel belt 5a Inner edge of steel belt 6 Guide member 7 Work guide bar 8 Pressing member 9 Drive motor 10 Stop member W Tapered workpiece X Axis of tapered workpiece A Transport direction w ₁ Steel belt inner edge interval w ₂ Work guide bar arrangement interval P Measurement reference position D Measurement outer diameter P ₁ , P ₂ Measurement reference position D ₁ , D ₂ Measurement outer diameter LB Laser light

Claims (6)

(57) [Claims] And 1. A tapered conveying apparatus a tapered workpiece is conveyed past the measurement position, the provided measurement position, and a guide device to arrange the measurement posture of the tapered workpiece received from the transfer device, A positioning device for moving the tapered workpiece riding on the guide device forward to position the tapered workpiece at a measurement reference position; and converting the outer diameter of the tapered workpiece at the measurement reference position into a laser beam. and a laser measuring instrument for scanning measuring Te, the transport device is left arranged in parallel at predetermined intervals
Formed as a belt conveyor consisting of a pair of belts on the right
In addition, the distance between the inner edges of the two belts is small.
Both are set narrower than the outer diameter of the center of the tapered workpiece.
Diameter monitor tapered workpieces, characterized by being. 2. The belt conveyor comprises a pair of left and right thin steel belts arranged in parallel at a predetermined interval, and the interval between the inner edges of both steel belts is at least the center of the tapered workpiece. 2. The outer diameter measuring device for a tapered workpiece according to claim 1, wherein the outer diameter is set to be smaller than the outer diameter. 3. The guide device according to claim 1, further comprising a guide member inclined upward with respect to a transfer direction of the transfer device, wherein the guide member has an inclination angle with respect to an axis of the tapered workpiece. The guide member is provided with guide grooves extending in parallel with a predetermined interval, and the interval between the inner edges of the guide grooves is
The outer diameter measuring apparatus for a tapered workpiece according to claim 1, wherein the outer diameter is set to be at least smaller than the outer diameter of a front end of the tapered workpiece. 4. The guide member comprises a pair of left and right work guide bars arranged in parallel at a smaller interval than the outer diameter of the front end of the tapered workpiece, and the inclination angles of the two work guide bars are adjusted. The outer diameter measuring device for a tapered workpiece according to claim 3, wherein a portion corresponding to a lower outer diameter portion of the tapered workpiece corresponding to a measuring portion is cut off. 5. The positioning device includes a pressing member that reciprocates in a front-rear direction. The pressing member presses a rear end face of the tapered workpiece forward when the taper workpiece moves forward. The outer diameter measuring apparatus for a tapered workpiece according to claim 1, wherein the tapered workpiece is positioned at a measurement reference position. 6. The laser measuring device is configured to cause a laser beam to be incident on a measurement outer diameter portion of the tapered workpiece from a direction perpendicular to a conveying direction of the tapered workpiece, and to scan the outer diameter at a high speed. The apparatus for measuring the outer diameter of a tapered workpiece according to claim 1, wherein: