JPH02136701A - Inspecting device for circular arc-like product - Google Patents

Abstract

PURPOSE:To efficiently inspect the squareness of the end edge surface against the outside peripheral surface of a circular arc-like product, and also, to execute the inspection with high reliability by detecting an output difference at the time when a pair of sensors are brought into contact with the circular arc-like product or allowed to approach said product. CONSTITUTION:In the case of inspecting an arc segment 1, when the segment 1 is placed on parallel rollers 11 and a pair of rolls 11, 11 are brought to one to two rotations to the inside, respectively, the axis center of the segment 1 can be made parallel to the axes of the rollers 11, 11, and centering is completed. Subsequently, a pressure member 14 is allowed to descend and the segment 1 is fixed onto the rolls 11, 11. Next, when a supporting member 12 is moved to the segment 1 side and detecting elements 13a, 13a of a pair of sensors 13, 13 are allowed to abut on the end edge surface 1b of the segment or allowed to approach said surface, an output difference of the sensors 13, 13 can be known, and by comparing it with an allowable output difference determined in advance, the segment 1 can be inspected or selected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for inspecting the perpendicularity of the edge surface to the outer circumferential surface of an arc-shaped product, such as a permanent foundation stone in the shape of an arc segment. .

[Conventional technology]

Conventionally, an arc segment l as shown in FIG. 3 is formed by powder metallurgy, subjected to sintering treatment, and polished on its inner and outer circumferential surfaces.
Inspect the perpendicularity of the edge surface 1b with respect to the edge surface 1b. As an inspection apparatus in this case, there is one having a configuration as shown in FIG. 4, for example. In FIG. 4, reference numeral 2 denotes a V block, which has a V-shaped inclined surface 3 on its upper surface, and an arc segment 1 is placed on this inclined surface 3. (2) A support member 4.5 is erected at one end of the block 2 to support the reference gauge 6 and the dial gauge 7 on substantially the same horizontal plane.

The procedure for inspecting the arc segment 1 shown in FIG. 3 using the above inspection apparatus will be described. First, the tip of the reference stopper 6 and the tip of the dial gauge 7 are adjusted to zero using a master (not shown), and then the arc segment 1 is placed on the inclined surface 3 of the V block 2. Then, by sliding the arc segment 1 in the direction of the arrow while pressing it from above and bringing the edge surface Ib of the arc segment 1 into contact with the reference stopper 6, the reading on the dial gauge 7 indicates that the arc segment 1 is Outer peripheral surface 1a
Inspect the perpendicularity of the edge surface 1b with respect to the edge surface 1b. In this case, if a permissible reading range of the dial gauge 7 is determined and, for example, the scale band within the permissible range is colored, the work of sorting out good products from defective products becomes extremely easy.

[ill the invention tries to solve! [Problem] In the above inspection device, it is necessary to accurately match the outer circumferential surface 1a of the arc segment 1 and the inclined surface 3 of the V block 2. If the two do not match accurately, the test results will be inaccurate. . In this case, the so-called seating position on the inclined surface 3 differs depending on the shape and size of the arc segment 1. In other words, in the case of an arc segment 1 in which the radius of curvature of the outer peripheral surface 1a is small as shown in FIG. Obtainable. However, in the case of arc segment l as shown in FIG.

The radius of curvature of the outer peripheral surface 1a is large, and the central angle θ of the inclined surface 3
, is large, making it uncomfortable to sit, difficult to center, and unstable. In order to match the outer peripheral surface 1a and the inclined surface 3, even if the arc segment 1 is pressed from above or vibrated, it cannot be easily corrected due to the influence of the frictional force between the two. Therefore, there are problems in that the reliability of the test results is low and there are large individual differences between workers. Furthermore, even when the axial length of the arc segment 1 is small, the same problem as above occurs because the seat is uncomfortable.

The present invention solves the above-mentioned problems in the prior art, enables efficient inspection of the perpendicularity of the edge surface to the outer circumferential surface of an arc-shaped product such as an arc segment, and enables highly reliable inspection of the inspection results. The purpose is to provide equipment.

(Means for solving !II!) In order to achieve the above object, first of all, in the first invention,
A pair of parallel rollers each having an axis in a horizontal plane are provided rotatably inside each other, a pair of sensors are provided near one end of the parallel rollers so as to be movable in the axial direction of the parallel rollers, and a sensor is provided above the parallel rollers. A pressing member formed to be movable up and down is provided so that the arc-shaped product can be fixed and removed from the parallel rollers, and the edge relative to the outer peripheral surface is determined by the output difference when the pair of sensors are brought into contact with or close to the arc-shaped product. Inspect the squareness of the edges. A technical method was adopted.

Further, in the second invention, the first invention has an axis in a horizontal plane.
A centering device with a pair of parallel rollers each formed inside so they can rotate freely! A plurality of pieces are arranged on an index table that can be freely rotated nine times at equal intervals and their axes are arranged approximately radially from the center of the index table, and one arc-shaped product is placed on the centering device near the outer periphery of the index table. a supply station formed to be able to place objects, a pair of sensors formed movably in the axial direction of the centering device, and a pressing member formed above the centering device so as to be movable up and down. and a discharge station formed to be able to discharge the arc-shaped product on the centering device, and determine the surface angle of the edge surface with respect to the outer circumferential surface by the output difference when the pair of sensors are brought into contact with or close to the arc-shaped product. Inspect. A technical method was adopted.

[Effect]

With the above configuration, centering can be accomplished within a very short time by rotating the parallel rollers inwardly with the arcuate product placed on the pair of parallel rollers. Further, in the second invention, by providing a plurality of the above-mentioned inspection devices on a table, automatic inspection work can be realized.

[Embodiment] FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention. In the figure, 11 is a pair of parallel rollers.

The axes are provided in a horizontal plane, and each is formed to be rotatable inside. Reference numeral 12 denotes a support member, which is provided near one end of the parallel roller 11 so as to be movable in the axial direction of the parallel roller 11. A pair of sensors 13 are mounted on the support member 12 so as to be present in a substantially horizontal plane with their detection ends 13a facing above the parallel rollers 11. Note that the output of the sensor 13 is connected to an arithmetic unit or a comparator (none of which is shown) so that it can be input. 14 is a pressing member, and parallel roller 1
It is installed above 1 so that it can move up and down.

With the above configuration, when inspecting the arc segment 1, the arc segment 1 is placed on the parallel roller 11 with the pressing member 14 pulled upward, and the pair of parallel rollers 11, 11 are moved inwardly. After one or two rotations, the axis of the five arc segments 1 can be made parallel to the axes of the parallel rollers 11, 11, completing the so-called necessary operation. That is, when the axis of the arc segment l is non-parallel to the axis of the parallel roller 11, the outer peripheral surface 1a of the arc segment 1
Since only a portion of the arc segment 1 is in contact with the parallel roller 11, the inward rotation of the parallel rollers 11, 11 generates a force couple that rotates the arc segment 1 in the plane. Therefore, when the arc segment l-1 rotates in a plane and the outer circumferential surface 1a comes into line contact with the outer circumferential surface of the parallel roller 11, the above-mentioned couple disappears, and the parallel rollers 11, 1
The rotating forces due to the frictional forces of 1 balance each other and complete centering. After the above centering is completed, the parallel rollers 11, I
The rotation of I is stopped, the pressing member 14 is lowered, and the arc segment I is fixed on the parallel roller 11°11. Next, move the support member 12 to the arc segment 1 side,
By bringing the pair of sensors 13a and 13a into contact with or close to the edge surface 1b of the arc segment l, the output difference between the sensors 13 and 13 can be known, and the predetermined allowable output difference can be determined. The arc segment 1 can be inspected or sorted by comparison with the above.

Next, FIG. 2 is a perspective view of essential parts showing another embodiment of the present invention, and the same parts are designated by the same reference numerals as in FIG. 1. In FIG. 2, lO is a centering device, which is composed of a pair of parallel rollers 11 and 11 as shown in FIG.
On an index table 21 formed to be freely rotatable, a plurality of index tables are arranged at equal intervals and their axes extend substantially radially from the center of the index table 21. Next, near the outer periphery of the index table 21, supply stations 22. Inspection station 23. The discharge stations 24,25 are arranged at approximately equal intervals. First, the supply station 22 is provided with a supply means (not shown) combined with, for example, a parts feeder, and the arc segment l shown in FIG. It is possible to place one item at a time. Next, the inspection station 23 includes the first
A support member 12 provided with a pair of sensors 13, 13 as shown in the figure and a pressing member 14 (not shown) are provided so as to be able to detect the difference in output between the pair of sensors 13, 13.

The sensors 13, 13 are installed at the discharge stations 24 and 25.
A discharge device (not shown) and chutes 24a, 25a are provided which operate in response to the output difference of 1 and are configured to discharge, for example, good products at a discharge station 24 and defective products at a discharge station 25.

The operation when inspecting the arc segment 1 as shown in FIG. 1 using the above configuration will be described.

First, at the supply station 22, the arc segments 1 aligned by a means such as a parts feeder are placed on a centering device 210 as shown by the arrow through a known pickup means.
When rotated 90° in the direction of the arrow, arc segment 1
The centering device ff1O with the
reach. At inspection station 23.

The test is carried out according to the procedure described with reference to FIG. After a further rotation of 90° in the direction of the arrow, the centering device 10 reaches the ejection station 24. In this case, if the test result at the test station 23 is good, the arc segment l is removed by the ejection device 2, for example, a vertical movement ejection device (not shown) provided between the parallel rollers 11 and 11, which is operated by a signal from the storage device. It is discharged into the discharge chute 24a. On the other hand, when the test result is negative, the ejecting device at the ejecting station 24 does not operate, and when the index table 21 further rotates 90 degrees and the centering device 10 reaches the ejecting station 25, the same procedure as described above is performed. The arc segment 1 is discharged as a defective product to the discharge chute 25a. A 90' rotation of the index table 21 then causes the centering device IO to reach the supply station 22 and repeat the above operation. Although the description has been omitted, at each station,
Each time the index table 21 rotates by 90 degrees, the respective operations proceed simultaneously.

In the above embodiment, an electric micrometer is used as a sensor, but other contacts,
The effect is the same even if a proximity sensor is used. Also, known means can be used as the constituent members and constituent devices of each station. Further, the rotation angle of the index table can be appropriately selected in accordance with the number and position of each station to be installed. Note that the arc-shaped products to be inspected are not limited to arc segment permanent magnets, and can of course be expanded to other similar shapes.

Quick feedback is possible, making production management extremely easy.

(4) It can also be installed immediately after the processing equipment for inspection, and the number of products in progress can be significantly reduced.

〔Effect of the invention〕

Since the present invention has the structure and operation as described above,
You can expect the following effects.

(1) Compared to conventional means using V-blocks, centering work can be performed extremely easily and quickly, and errors and individual differences can be eliminated or greatly reduced, increasing the reliability of the test. can be significantly improved.

(2) By installing a plurality of centering devices on the index table, it becomes possible for one person to carry multiple centering devices or for unmanned automatic operation, thereby improving inspection efficiency and saving labor.

(3) By providing multiple discharge stations.

In addition to discharging by grade, it is also possible to supply data to the processing process.

[Brief explanation of the drawing]

1 and 2 are perspective views of essential parts showing an embodiment of the present invention, FIG. 3 is a perspective view of an arc segment, FIG. 4 is a perspective view of essential parts of a conventional inspection device, and FIG. 5 and the sixth
Each figure is an end view showing the state of contact between the arc segment and the inclined surface. l: arc segment, lO: centering device l: parallel roller, 13: sensor, 14: pressing member, 21: index table, 22: supply station, 23: inspection station, 24° 25 = discharge station.

Claims (2)

[Claims] (1) A pair of parallel rollers each having an axis in a horizontal plane are rotatably provided inside each roller, and a pair of sensors are provided near one end of the parallel rollers so as to be movable in the axial direction of the parallel rollers. A pressing member formed upwardly movable up and down is provided so that the arc-shaped product can be fixed and removed from the parallel rollers, and the outer periphery is determined by the output difference when the pair of sensors are brought into contact with or close to the arc-shaped product. An inspection device for arc-shaped products characterized by inspecting the perpendicularity of an edge surface to a surface. (2) A plurality of centering devices each having a pair of parallel rollers with their axes in a horizontal plane, each rotatably formed inside, are placed on the rotatably formed index table at regular intervals, and the axis is from the center of the index table. A supply station is arranged approximately radially and is formed near the outer periphery of the index table so that one arcuate product can be placed on the centering device; An inspection station is provided with a pair of sensors and a pressing member formed above the centering device so as to be movable up and down, and a discharge station is formed to be able to eject the arc-shaped product on the centering device. An inspection device for an arc-shaped product, characterized in that the perpendicularity of an edge surface to an outer circumferential surface is inspected based on the difference in output when a sensor is brought into contact with or close to the arc-shaped product.