JPH0594760U - Equipment for flaw detection and selection of stamped and molded products - Google Patents

Abstract

(57) [Abstract] [Purpose] A molded article in a mold is clamped and rotated by a pair of rotary shafts from above and below, and a flaw detector is mounted on one of the centering heads of the pair of centering heads arranged laterally. In a flaw detection sorting device that detects flaws with a flaw and selects whether it is good or bad, the distance between the outer peripheral surface of the rotating in-mold molded product and the tip of the flaw is kept constant, and the detection sensitivity of the flaw can be stabilized. To do. [Structure] The head portion (9b) provided with a pair of rollers (9a) of one centering head (9) on which the flaw detector (30) is mounted,
The base rod (9c) has a pin shaft (9d) and two springs (9d).
A cylinder (26) for connecting the centering head (9) via a spring cylinder (9f) provided at the rear end of the base rod (9c) while being provided so as to be swingable in the lateral direction via (e). ). Also, the other centering head
Provide at least two rollers (10a) on (10).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flaw detection / sorting apparatus for stamping-molded articles upset-molded from a rod-shaped material by a stamping apparatus such as a cold former or a hot former, and particularly, such as a seat nut and a cone clutch. In regard to the stamping and molding products having a perfect circle on the outer circumference, it relates to a flaw and damage selecting device for stamping and molding products which is used to automatically and continuously perform 100% flaw detection for the presence or absence of surface defects due to the stamping molding. It is a thing.

[0002]

[Prior Art]

 In recent years, higher reliability is required for relatively small die-molded products used in high-performance, high-precision equipment in the field of electronic equipment, which has been developing rapidly. , A stricter guarantee, that is, a 100% defect-free guarantee is required. On the other hand, a stamped product continuously molded by a stamping device such as a cold former or a hot former is generally molded by being subjected to a precise and high degree of plastic deformation. Surface defects are likely to occur at a certain frequency.

Therefore, in order to meet the above-mentioned demands for strict surface quality assurance, in addition to thoroughly examining the quality of the material to be used, after stamping and molding, 100% surface inspection is performed to determine the quality. In the past, it was necessary for inspectors to individually perform flaw detection / judgment on these stamped and molded products on a line separate from the stamped and molded line, using methods such as fluorescent magnetic particle flaw detection and fluorescent permeation flaw detection. I was selecting whether it was good or bad.

However, when an inspector individually performs flaw detection / judgment on these stamped and molded products to select whether they are good or bad, the handling is complicated and a relatively long working time is required, while the cold former or Since a die-casting device such as a hot former generally has a very high molding speed, there is a large gap between the flaw detection / sorting speed and the productivity of the die-casting device, and as a result, the overall productivity is increased. It becomes a big factor to inhibit. Therefore, it is possible to automatically and continuously perform 100% flaw detection on the surface of these stamped and molded products at a high working speed equivalent to the molding speed of a stamping device such as a cold former or a hot former to select the quality. A flaw detection and selection device was desired.

Therefore, the inventors of the present invention proposed a flaw detection / selection device (Japanese Patent Application No. 2-71249) having a configuration capable of meeting the above request prior to the present application. FIG. 3 shows the essential structure of an example of the flaw detection and selection apparatus of this prior application. As shown in Fig. (A), which is a front sectional view of the flaw detection and selection apparatus, a pair of rotating shafts (41) and (42) are provided to sandwich and rotate the workpieces W that are individually fed laterally from above and below. , (A) is a partial view taken along the line AA of (a), and as shown in (b), it has rollers (43a), (44a) for rotatably sandwiching the work W from both sides at its tip. It is equipped with a pair of centering heads (43), (44) that can be moved forward and backward and a flaw detector (45) mounted on one of the centering heads (43). A relatively large and heavy workpiece W is easily rotated to detect flaws efficiently.

[0006]

[Problems to be solved by the device]

 However, in order to further improve the efficiency and accuracy of flaw detection / selection of stamped and molded products by the flaw detection / selection device of the above-mentioned prior application, a detailed study was made on its specific use example. It was found that the sorting device (Practical application No. 2-71249) still has a problem to be improved in terms of flaw detection accuracy.

That is, in order to reliably hold and rotate a relatively large and heavy work W, it is necessary to increase the pressing force from above and below by the pair of rotating shafts (41) and (42). However, during rotation of the work W, the center of rotation cannot be substantially adjusted by the pair of centering heads (43) and (44). Therefore, if the work W has eccentricity or variation in outer diameter, or if there is an error in the centering adjustment before starting rotation, center deviation of the work W to be rotated occurs, and this work W outer peripheral surface and flaw detection. The distance from the tip of the probe (45) cannot be kept constant, the detection sensitivity of the flaw detector (45) changes, and the flaw detection performance becomes unstable, and as a result, it becomes difficult to guarantee high-precision quality. Of.

The present invention has been made in order to solve the above-mentioned problems, and when rotating a die-molded article upset by a die-casting device to detect a flaw, the outer circumference of the rotating die-molded article is detected. The purpose is to provide a flaw detection and sorting system for stamped and molded products that can always maintain a constant distance between the surface and the tip of the flaw detector and can automatically and flawlessly detect the surface of the flaw with a high degree of accuracy. It is what

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has the following configuration. That is, the flaw detection / selection apparatus for stamped and molded products according to the present invention has a pair of rotating shafts for individually clamping and rotating the laterally fed workpieces from the upper and lower sides, and facing the workpieces from both sides. A pair of centering heads that are provided so as to be able to move forward and backward and that have rollers for holding the workpiece rotatably at the tip end, a moving means that moves these centering heads forward and backward, and a flaw detector mounted on one of the centering heads. In a flaw detection / sorting apparatus for stamped and formed products, a centering head having a flaw detector mounted thereon is swingably connected to a moving means via a bullet, and the other centering head is at least 2 It is characterized by comprising individual rollers.

[0010]

[Action]

 In the present invention, since the centering head on which the flaw detector is mounted is provided so as to be swingably connected to the moving means via the ammunition, the centering head is clamped and rotated by the pair of rotary shafts from the vertical direction. Even if the workpiece has eccentricity, variation in outer diameter, or center runout due to centering adjustment error, the workpiece swings and moves back and forth following the displacement of the rotating workpiece outer peripheral surface. The detection sensitivity of this flaw detector can be stabilized by always keeping the distance between the tip of the flaw detector and the outer peripheral surface of the workpiece constant.

Further, even if the centering head having the flaw detector mounted thereon is swingable, the other centering head has at least two rollers, so that the workpieces fed laterally can be rotated. It can be sandwiched and centered.

[0012]

【Example】

 A flaw detection and selection apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are drawings showing a flaw detection and selection apparatus according to an embodiment of the present invention, wherein (a) of FIG. 1 is a front sectional view and (b) is (a). 2A is a partial cross-sectional view taken along the line AA of FIG. 2A, in which FIG. 2A is a top view, and FIG.

In FIGS. 1 and 2, (1) is a work transfer roadbed, and this work transfer roadbed (1) is attached to a base (15) through a plurality of columns (14). It is an annular plate-like member that is supported and arranged horizontally, and a work guide wall (1a) is provided around the outer peripheral edge thereof. Further, as shown in (a) of FIG. 2, a feeder rail (11) for receiving the work W is provided on the outer side of the work transfer path base (1) on the entrance side indicated by the arrow C. , A non-defective product delivery path (12) is provided below the outer side of the feeder rail (11), which is located 180 degrees opposite to this, and a phase of 60 degrees clockwise is provided from the non-defective product delivery path (12). A defective product delivery path (13) is provided on the changed outer portion.

(2) is an intermittent rotating disk, and the intermittent rotating disk (2) is concentrically and rotatably disposed on the work transfer path disk (1) and has a pair of outer peripheral portions. A plurality of work engaging tools (3) forming U-shaped recesses in which the outer periphery of the work W is loosely fitted are detachably attached by opening the recesses in the outer peripheral direction. Further, six pairs of work engaging members (3) are attached to the outer circumference of the intermittent rotating disk (2) so as to form recesses of 60 ° at an equal pitch. The work engaging members (3) of each pair are attached so that the distance between them can be adjusted, and the size of the recess formed by the pair can be adjusted according to the outer diameter of the work W to be engaged. ing.

Further, as shown in FIG. 1 (a), the intermittent rotating disk (2) has a central shaft (5) which is erected on the base (15) so as to penetrate through the center thereof. It is rotatably supported by the hollow rotating shaft (4) and is mounted on the base (15) through the intermittent feed plate (4a) provided at the lower end of the hollow rotating shaft (4). It is driven by a lever unit (16) and is intermittently rotated in a clockwise direction indicated by an arrow D in FIG. The lever unit (16) is connected to a main motor (17) arranged adjacently on the base (15) and driven by the operation of the main motor (17).

Reference numeral (6) is a support arm, and the support arm (6) has a central axis (5) as shown in (a) of FIG. 1 and (a) of FIG. It is cantilevered at the upper end and is horizontally extended from the position where the feeder rail (11) is arranged in the radial direction with the phase changed by 60 degrees clockwise. Further, below the support arm (6), a movable support arm (21) which is vertically movable by a cylinder (20) vertically provided in an intermediate portion is arranged in parallel.

(7) is a drive rotary shaft, and this drive rotary shaft (7) is a drive shaft vertically installed at the tip of the support arm (6) as shown in (a) of FIG. 1. The work is attached to the lower end of the spline connector (18) that engages with the output shaft of the motor (19), and the lower end surface of which is changed in phase by 60 degrees clockwise from the position where the feeder rail (11) is installed. It is arranged facing the roadbed (1). On the other hand, the spline connector (18) is rotatably supported by the tip of the movable support arm (21), and the drive rotation shaft (7) attached to the lower end of the spline connector (18). Is rotated by the drive motor (19) and moved up and down by the operation of the cylinder (20).

(8) is a push-up rotary shaft, and the push-up rotary shaft (8) is mounted on the base via a bearing (22) provided at the lower end as shown in (a) of FIG. 1. It is rotatably connected to the output shaft of the screw cylinder (23) installed vertically on the table (15), and its center line of rotation is matched with the center line of rotation of the drive shaft (7), and the work transfer path base ( It is arranged below 1) so that it can move up and down. The bottom of the work transfer path base (1) directly below the drive rotary shaft (7) is opened to allow passage of the upper end of the push-up rotary shaft (8). Here, the cylinder (20) and the screw cylinder (23) operate in synchronization with each other, and the operation causes the drive rotary shaft (7) and the push-up rotary shaft (8) to approach each other, and the drive rotary shaft (7) The work W that has been laterally fed directly below is pressed and pinched from above and below to rotate.

(9) is an outer centering head, and this outer centering head (9) is attached to a base (15) via a column (24) as shown in (a) of FIG. 1. It is slidably mounted on a supported pedestal (25) and rotates clockwise from the position where the feeder rail (11) of the work transfer roadbed (1) is arranged as shown in (a) of [Fig. 2]. It is located outside the position where the phase is changed by 60 degrees.

The outer centering head (9) has a head portion (9b) provided with a pair of rollers (9a) at its front end and a head portion (9b) as shown in FIG. 1 (b). (9b) is connected to a pin shaft (9d) via two springs (9e), and has a base rod portion (9c) provided with a spring cylinder (9f) at a rear end thereof. It is connected to the output end of a cylinder (26) mounted on the rear part of the frame (25) via a spring cylinder (9f) of 9c).

Under the above-mentioned structure, the outer centering head (9) is moved toward the center of the work transfer path base (1) by the operation of the cylinder (26) and is applied with a reaction force of a certain level or more. At this time, the head portion (9b) can be swung laterally or moved back and forth to absorb the reaction force.

(10) is an inner centering head, and this inner centering head (10) is attached to a base (15) via a column (27) as shown in (a) of FIG. 1. It is slidably mounted on a supported pedestal (28), and is arranged inside and below the work transfer path board (1) facing the outer centering head (9). The inner centering head (10) is provided with a pair of rollers (10a) at its tip, while its rear end is connected to a cylinder (29) mounted on the inner end of the gantry (28). The actuation of this cylinder (29) causes it to move towards the outer centering head (9).

Here, the outer / inner centering heads (9), (10) are brought closer to each other in synchronization with each other by the operation of the cylinders (26), (29), and are laterally fed directly below the drive rotation shaft (7). The workpiece W is clamped rotatably by a pair of rollers (9a) and (10a) provided at the respective tips, but in this device, a pair of rollers (9a) and (10a) are provided at the tip of the inner centering head (10). Since 10a) is provided, even if the outer centering head (9) can be swung, centering can be performed so that the rotation center line of the work W matches the rotation center line of the drive rotation shaft (7). it can.

(30) is an eddy current flaw detector, and this eddy current flaw detector (30) is attached to the head portion (9b) of the outer centering head (9) as shown in [FIG. 1] and [FIG. 2]. It is placed, its front end is located between a pair of rollers (9a), and its tip is arranged toward the center of the intermittent rotating disk (2). The eddy current flaw detector (30) is connected to an eddy current flaw detector (not shown here).

(31) is a non-defective item delivery lid, and the non-defective item delivery lid (31) is located above the non-defective item delivery passageway (12) as shown in FIG. 2 (b). The cylinder (32) provided on the bottom of (1) and supported by the base (15) is operated to open downward. Further, the cylinder (32) is adapted to operate by an electric signal from an eddy current flaw detector connected to the eddy current flaw detector (30) to open and close the non-defective item dispensing lid (31).

On the other hand, as shown in (a) of FIG. 1, the attachment part of the defective product delivery path (13) of the work transfer path board (1) is opened obliquely downward and transferred to this position. The received work W is automatically discharged to the outside.

The surface flaw detection and selection of the work W by the flaw detection / selection apparatus of the present embodiment having the above configuration will be described. First, as shown in FIG. 2 (a), the intermittent rotating disk (2) The recesses of any one of the pair of work engaging members (3) and the end positions of the feeder rails (11) are adjusted so as to coincide with each other. At this time, the leading one of the workpieces W continuously fed through the feeder rail (11) on the entry side enters the concave portions of the pair of workpiece engaging members (3) and is engaged with the concave portions. From this state, input to the main motor (17) to start the operation of the device of this example.

When the operation of the main motor (17) is started, the intermittent rotation disk (2) rotates 60 degrees clockwise and is temporarily stopped. During this rotation, the drive rotary shaft (7) and the push-up rotary shaft (8) are retracted upward and downward, respectively, as shown in (a) of [Fig. 1]. The inner centering head (10) and the inner centering head (10) are retracted laterally, as indicated by the solid line in the same figure (b). On the other hand, due to the rotation of the intermittent rotating disk (2), the work W engaged with the concave portion of the pair of work engaging tools (3) is guided along the work guide wall (1a) of the work transfer path disk (1). , 60 ° in the clockwise direction and is located directly under the drive shaft (7), that is, between the outer centering head (9) and the inner centering head (10) as shown in [Fig. 1]. Place and pause.

At this time, the cylinders (26) and (29) are operated in synchronization, and the work W is rotated by the rollers (9a) and (10a) at the tips of the outer and inner centering heads (9) and (10). Freely clamp and center, then operate cylinder (20) and screw cylinder (23) in synchronization, and clamp work W from above and below by drive rotary shaft (7) and push-up rotary shaft (8). Then, the inner centering head (10) is retracted to the original position, and at the same time, it is input to the drive motor (19) to rotate the work W via the drive rotation shaft (7). The upper end surface of the push-up rotary shaft (8) projects slightly from the upper surface of the work transfer path base (1), and the height position for supporting the work W is set to the upper limit.

On the other hand, simultaneously with the input to the drive motor (19), the eddy current flaw detector (30) mounted on the outer centering head (9) is operated to detect the outer peripheral surface of the rotating work W. .. Here, when the work W has an eccentricity or a variation in outer diameter dimension, or an error occurs in the centering adjustment before the start of rotation, a center runout occurs in the rotating work W. The head part (9b) of the outer centering head (9) swings and reciprocates easily following the displacement caused by the core runout of the outer peripheral surface of the work W, and the pair of rollers (9a) at the tip end are moved. Since the contact with the work W is maintained, the distance between the tip of the mounted eddy current flaw detector (30) and the outer peripheral surface of the work W is always kept constant, and the flaw detection accuracy is stable. You can

Then, the flaw detection result of the work W by the eddy current flaw detector (30) is transmitted to an eddy current flaw detector (not shown) as an electric signal, and the eddy current flaw detector determines the presence or absence of a defect and the determination. The result is transmitted as an electric signal to the cylinder (32) for opening and closing the non-defective item dispensing lid (31). In this embodiment, the temporary stop time for each intermittent rotation pitch of the intermittent rotation disk (2) is the time during which the work W rotates twice.

By the intermittent rotation of the intermittent rotation disk (2) accompanied by the above-mentioned coordinated operation of the respective parts, the work W from the feeder rail (11) on the entrance side is sequentially flaw-tested individually, and in the exit direction at a pitch of 60 degrees. To reach the non-defective item delivery lid (31), and the non-defective item W is delivered to the non-defective item delivery path (12) by the lower opening of the non-defective item delivery lid (31) based on the electric signal from the eddy current flaw detector. Then, the defective work W is transferred as it is to the defective product delivery path (13) side and is delivered from the defective product delivery path (13). That is, in the flaw detection and selection apparatus of this embodiment, the work W is intermittently transferred to perform rotation / flaw detection and pass / fail selection each time the intermittent rotation disk (2) is intermittently rotated.

As described above, according to the flaw detection / selection apparatus of the present embodiment, the stamped and formed products as the workpieces fed from the stamping apparatus are efficiently transferred while individually and continuously transferred. It is possible to perform flaw detection and selection.

Further, in the flaw detection / selection apparatus of the present embodiment, even a relatively large and heavy work can be reliably rotated for flaw detection, and in addition, the outer peripheral surface of the rotating work and the tip of the eddy current flaw detector can be detected. Since the distance between them can always be kept constant, it is possible to select pass / fail with high flaw detection accuracy. Furthermore, by adjusting or exchanging the pair of work engaging tools of the intermittent rotating disk, it is possible to easily deal with the change of the shape of the work to be inspected, and it can be applied to a wide range of flaw detection selection.

In this embodiment, the work is individually traversed in the circumferential direction to perform flaw detection and selection, but this is an example, and the work is pressed and clamped from above and below to rotate. At the same time, as long as the flaw is detected by the flaw detector mounted on one of the centering heads configured according to the gist of the present invention, the individual side feed mechanism of the work and the pass / fail distribution mechanism have other configurations. Needless to say, may be adopted.

[0037]

[Effect of the device]

 As described above, according to the flaw detection / sorting apparatus for stamping / molding products according to the present invention, the stamping / molding by upsetting is performed by a stamping device such as a cold former or a hot former having a high molding speed. It is possible to automatically and continuously perform 100% flaw detection and to perform quality screening at a high working speed equivalent to the molding speed of these stamping devices and with high flaw detection accuracy, thus increasing productivity. , The reliability of product quality can be significantly increased.

[Brief description of drawings]

1A and 1B are views showing a flaw detection and selection apparatus according to an embodiment of the present invention, in which FIG. 1A is a front sectional view, and FIG. 1B is a partial sectional view taken along the line AA of FIG.

2A and 2B are views showing a flaw detection and selection apparatus according to an embodiment of the present invention, wherein FIG. 2A is a top view and FIG. 2B is a sectional view taken along line BB in FIG. 2A.

3A and 3B are diagrams showing a main configuration of a conventional flaw detection / selection apparatus, wherein FIG. 3A is a front sectional view, and FIG. 3B is a partial sectional view taken along the line AA in FIG. 3A.

[Explanation of symbols]

(1) --Work transfer roadbed (2) --Intermittent rotating disk (3) --Work engaging tool (7) --Drive rotary shaft (8) --Push up rotary shaft (9) --Outer centering head ( 9a)-Roller (9b)-Head (9c)-Base rod (9d)-Pin shaft (9e)-Spring (9f)-Spring cylinder (10)-Inner centering head (10a) --Roller (12)-Good product delivery path (13)-Defective product delivery path (17)-Main motor (19)-Drive motor (20)-Cylinder (23)-Screw cylinder (26) --Cylinder (29)-Cylinder (30)-Vortex flaw detector (31)-Good product dispensing lid (32)-Cylinder W--Workpiece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hidenori Hata, 2nd Nadahama Higashi-cho, Nada-ku, Kobe-shi, Hyogo Prefecture Kobe Steel Works, Kobe Steel Works (72) Inventor Shiro Iwata 2nd Nadahama-higashi, Nada-ku, Kobe, Hyogo Prefecture Stock Company Kobe Steel Works Kobe Steel Works (72) Inventor Isao Motoyama 2 Nadahamahitocho, Nada-ku, Kobe City, Hyogo Prefecture Kobe Steel Works Kobe Steel Works

Claims (1)

[Scope of utility model registration request] 1. A pair of rotating shafts for sandwiching and rotating the individually laterally fed works, and a pair of rotating shafts facing the works so as to be able to advance and retreat. In a flaw detection and sorting apparatus for stamped molded products, which comprises a pair of centering heads provided with rollers capable of nipping as much as possible, a moving means for moving the centering heads forward and backward, and a flaw detector mounted on one of the centering heads. A stamping machine having a centering head on which a flaw detector is mounted is provided so as to be swingably connected to a moving means via a bullet, and the other centering head is provided with at least two rollers. Equipment for flaw detection and sorting of molded products.