JPH0349702B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an outer diameter measuring device for a centerless grinding machine, and more particularly, to a device for measuring an outer diameter dimension of a centerless grinding machine. This invention relates to a device that continuously measures all the outside diameters of workpieces online during transportation after through-feed grinding.

Conventional technology and its problems Conventionally, with centerless grinding machines, the workpiece after through-feed grinding is conveyed by a chain or flat belt, and the outer diameter is measured by sampling using a contact-type sizing device to control dimensions. I was getting used to it.

However, in the case of a workpiece having an extremely small outer diameter as described above, it is extremely difficult to transport the workpiece after grinding in a stable posture and to measure it with a contact-type sizing device. In addition, in recent years, very high dimensional accuracy has become required, and conventional sampling measurements are insufficient.
It is requested to measure all the workpieces, but
Extensive measurements are not possible with conventional equipment.

The purpose of this invention is to solve the above-mentioned problems, and to make it possible to measure all workpieces after through-feed grinding online with high accuracy and in a short time while they are being transported, even for workpieces with extremely small outer diameters. An object of the present invention is to provide a diameter dimension measuring device.

Means for Solving the Problems The outer diameter dimension measuring device according to the present invention is used in a centerless grinding machine that grinds a workpiece by through-feed grinding, and includes a workpiece conveying device that feeds the workpiece after through-feed grinding in the axial direction of the workpiece, and It is equipped with a laser measuring device that measures the outer diameter dimension by irradiating the workpiece being moved by the workpiece transport device with a laser beam from a direction perpendicular to the axis of the workpiece, and the workpiece transport device moves the workpiece inside the pipe. The pipe is fed in a single line, and is characterized in that a measurement gap is provided at a predetermined position of the pipe for passing laser light.

Operation The workpieces are conveyed in a single line in the axial direction within the pipe of the workpiece conveyance device. Therefore, even a workpiece with an extremely small outer diameter can be transported in a stable posture, and the structure of the workpiece transport device is also simple. Then, while the workpiece being moved in the pipe passes through the measuring gap, its outer diameter is measured by a laser measuring device. Therefore, the measurement accuracy is good and the time required for measurement is short. Therefore, it becomes possible to measure all workpieces after through-feed grinding online while they are being transported.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the following description, front, rear, left, and right refer to the transport direction of the workpiece. That is, the right side of FIG. 1 is the front, the left side is the rear, the back side of the page is the left, and the front side of the page is the right.

FIG. 1 schematically shows the part on the workpiece exit side of the centerless grinder 10, the outer diameter dimension measuring device 11, and the rear part of the workpiece discharge device 12, and FIGS. 2 to 4 show each part of the measuring device 11. Shown enlarged.

Although not shown in the drawings, the centerless grinding machine 10 can handle workpieces W with small outer diameters such as pins.
are successively supplied between the grinding wheel and the adjustment wheel by the workpiece feeding device so that the axes thereof face forward and backward, and are ground, and are sent to the exit guide 13 by the thrust during grinding.

The measuring device 11 includes a workpiece transfer device 17 that supports the workpiece W in the pipes 14, 15, and 16 arranged approximately horizontally in one row in the front and back so that the axis thereof is approximately horizontal in the front and rear direction, and transports the workpiece W in the direction of the axis. , and a laser measuring device 18 that non-contactly measures the outer diameter dimension of the workpiece W being transported.

The transport device 17 is configured as follows, for example.

The pipes 14, 15, 16 are arranged in a row between the outlet guide 13 of the centerless grinding machine 10 and the ejection device 12. A first roller feeding device 19 is installed between the exit guide 13 and the first pipe 14 at the rear.
However, a second roller feeding device 20 is provided between the first pipe 14 and the intermediate second pipe 15, respectively. Each roller feeding device 19, 20 has an upper and lower roller 1, which is composed of a metal driven roller 21 located below the pipes 14, 15 and a drive roller 22 made of an elastic material such as rubber located above the pipes 14, 15.
Two pairs of rollers 23 are provided at the front and rear, and as shown in detail in FIG. A pair of left and right guide plates 24 that are thinner than the diameter are arranged with an interval slightly larger than the outer diameter of the workpiece W. Furthermore, guides 33 are provided above and below between these left and right guide plates 24. The driving rollers 22 of each pair of rollers 23 are continuously rotated in the direction of the arrow in FIG. 1 by an appropriate means such as a motor.
The workpiece W sent to the upper and lower rollers 21,
22, guided by the left and right guide plates 24 and upper and lower guides 33, sent to the front roller pair 23, and further sent forward after being sandwiched between the upper and lower rollers 21 and 22. The feed speed of the first roller feed device 19 is a little faster than the passing speed of the centerless grinder 10, and the feed speed of the second roller feed device 20 is a little faster than the feed speed of the first roller feed device 19. Grinding fluid is added to the rear part of the first pipe 14 from the workpiece W being transported using a vacuum device or the like.
A water draining device 25 for removing grinding powder etc. is provided,
Air injection devices 26 and 27 for injecting air into the pipe 14 and sending the workpiece W forward by air pressure are provided at a front portion and a front portion of the water draining device 25. Similarly, a water draining device 28 is provided in the middle of the second pipe 15, and a water draining device 28 is provided in the middle of the second pipe 15.
An air injection device 29 is provided in the middle of the air.
Note that the configurations of these air injection devices 26, 27, and 29 are arbitrary, but they may be configured similarly to, for example, Utility Model Application No. 1069/1983, which was previously filed by the present applicant.

As shown in detail in FIGS. 3 and 4, the second
For example, 1 mm between the pipe 15 and the third pipe 16
A small measuring gap 30 is provided in which the laser measuring device 18 is provided. The laser measuring device 18 includes a light emitting section 31 disposed on one side of the gap 30, for example, on the right side, and a light receiving section 32 including a control section disposed on the opposite side of the gap 30, for example, on the left side. The laser light enters the light receiving section 32 through the gap 30.

Next, the operations of the centerless grinder 10, measuring device 11, and discharge device 12 will be explained.

First, in the centerless grinding machine 10, the workpieces W are ground one after another and sent to the exit guide 13, as described above. The workpiece W that has undergone through-feed grinding in this way is further pushed forward by the succeeding workpiece W and transferred to the first roller feeding device 19, thereby being sent further forward. It enters the inside of the first pipe 14 from the rear end thereof. The workpiece W that has entered the first pipe 14 is pushed by the following workpiece W and moves further forward, and during this time, the first water draining device 25 removes grinding fluid, grinding powder, etc. . When the workpiece W reaches the first injection device 26 , it is sent forward at high speed by the air injected from it, and is further accelerated by the second injection device 27 and transferred to the second roller feeding device 20 .
sent to. The workpiece W sent to the second roller feeding device 20 is thereby sent forward and enters the second pipe 15, and is further pushed by the following workpiece W and passes through the gap 30 to the second pipe 15. 3 Enter pipe 16. While the workpiece W is moving inside the second pipe 15, the grinding fluid and grinding powder are completely removed by the second draining device 28, and preparations for measurement are made, and the workpiece W is moved into the gap 30. While passing through the section, the outer diameter dimension is measured by the laser measuring device 18. Workpiece W is placed at gap 30.
If there is no laser measuring device 1, as mentioned above,
All the laser beams emitted from the light projecting section 31 of 8 enter the light receiving section 32 through the gap 30, but while the workpiece W passes through the gap 30, the laser light emitted from the light projecting section 31 passes through the gap 30. Part of the light is blocked by the workpiece W. At this time, the workpiece W that is hit by the laser beam
Since the parts are outside of pipes 15 and 16,
The workpiece W comes out from the light projecting section 31 of the laser measuring device 18.
The diameter of the workpiece W in the vertical direction can be measured by receiving the laser beam that has passed above and below the workpiece W with the light receiving section 32. Note that since the measurement of the outer diameter dimension using a laser measuring device itself is well known, detailed explanation will be omitted. The workpiece W, whose outer diameter dimension has been measured in this way, is further pushed forward by the following workpieces W, and when it reaches the third injection device 29, it is accelerated by the air injected from it at high speed. It is sent to the discharge device 12 and discharged by an appropriate means.

Although not shown, the measuring device 11 is equipped with a control device that controls the centerless grinding machine 10 based on the measurement results of the outer diameter dimension, and the machining dimension is corrected based on the measured value. . Also, based on the measured values, good products and defective products can be distinguished and discharged. Note that such a configuration is also well known, so detailed explanation will be omitted.

In the above embodiment, the outer diameter dimension is measured by applying a laser beam to the workpiece from the side, but it is also possible to measure the outer diameter dimension by applying a laser beam to the workpiece from above, from below, or obliquely.

Effects of the Invention According to the apparatus of the present invention, as described above, even if the workpiece has an extremely small outer diameter, the workpiece after through-feed grinding can be transported in a stable posture.
All of these can be measured online with high precision and in a short time during transportation, and the structure of the workpiece transportation device is simple.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an outer diameter dimension measuring device showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line of FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line of FIG. FIG. 4 is an enlarged view of the measuring gap shown in FIG. 1. 10... Centerless grinding machine, 11... Outer diameter dimension measuring device, 14, 15, 16... Pipe, 17...
... Workpiece conveyance device, 18 ... Laser measuring device, 30
...Measurement gap, W...Workpiece.

Claims (1)

[Claims] 1. In a centerless grinding machine that grinds a workpiece by through-feed grinding, a workpiece conveyance device that transports the workpiece after through-feed grinding in its axial direction;
It is equipped with a laser measuring device that measures the outer diameter dimension by irradiating the workpiece being moved by the workpiece transfer device with a laser beam from a direction perpendicular to the axis of the workpiece, and the workpiece transfer device moves the workpiece into a pipe. 1. An outer diameter measuring device for a centerless grinding machine, characterized in that the pipe is fed in a single line within the pipe, and a measuring gap for passing a laser beam is provided at a predetermined position of the pipe.