KR101191430B1 - Manufacturing apparatus for pencil core capable of sensing normal operation - Google Patents

Abstract

PURPOSE: An apparatus for manufacturing a pencil core is provided to prevent a defective pencil core by sensing the normal or abnormal rotation of a cam. CONSTITUTION: A metal strip is supplied to a bottom die. A top die stamps the metal strip. A first transfer die stamps one side of a laminar member. A second transfer die stamps the other side of the laminar member. A first cam assembly transfers the first transfer die by rotating for preset time. A second cam(510) assembly transfers the second transfer die by rotating for preset time. A sensor unit(550) senses the normal or abnormal rotation of the first cam assembly or the second cam assembly. A sensor hole(551) is formed on at least one cam. The sensor unit senses the sensor hole.

Description

Manufacturing apparatus for pencil core capable of sensing normal operation

The present invention relates to a pencil core manufacturing apparatus, and more specifically, it can detect whether it is operating normally or can stop the device in case of abnormal operation can prevent the bad pencil core to be continuously manufactured. In particular, the present invention relates to a pencil core manufacturing apparatus that can prevent the laminated barrel from being damaged.

Generally, pencil cores are used in so-called ignition system coils for low voltage ignition systems, such as spark plugs.

1 and 2, the pencil core is formed by laminating a plurality of lamina members 1 having different widths. Each lamina member 1 is formed with interlock tabs 2 for coupling to each other, and the interlock tabs 2 formed on the upper lamina member 1 when the lamina members 1 are stacked are lower laminas. The coupling is achieved by forcibly fitting the interlock tab 2 of the member 1.

The lamina member 1 is manufactured by stamping from a metal strip by a pencil core manufacturing apparatus. Since the pencil core 5 must stamp the lamina members 1 having different widths, unlike the laminated cores for stators and rotors, the width of the pencil cores 5 when stamping the lamina members 1 from the metal strip is increased. Means for adjusting must be provided.

U. S. Patent No. 6,484, 387 discloses a technique for stamping lamina members 1 of different sizes by means of transversely transferable die stations. However, the die station includes a plurality of die holes corresponding to the type of lamina member 1 to be stamped, and a plurality of punch pins inserted into the die holes to punch metal strips. Thus, during operation, the upper die on which the punch pins are suspended and the lower die on which the die holes are formed are stamped by the servo motor means while moving in a direction perpendicular to the supply direction of the metal strip. At this time, the upper die and the lower die must move a considerable distance to select the punch and die hole corresponding to the lamina member of the desired size, and the movement interval for each stamping is very large. This long distance movement of the die station not only imposes an excessive load on the thermomotor, but also increases the frictional force caused by the movement. In addition, it is true that the work process for manufacturing pencil cores is very slow and the accuracy of stamping positioning is also lowered as the distance is moved rapidly.

In order to solve this problem, the present applicant has devised a pencil core manufacturing apparatus having first and second transfer dies, and the pencil core manufacturing apparatus is disclosed in Korean Patent No. 10-0510059.

As shown in FIG. 3, the pencil core manufacturing apparatus includes first and second transfer dies 50 and 60 and a first and second transfer die 50 which are reciprocated in a direction transverse to a supply direction of a metal strip. A cam 70 for reciprocating the 60 is provided, a step motor 90 for intermittently rotating the cam 70 by a predetermined angle, and an upper die (not shown).

In the pencil core manufacturing apparatus, the first and second transfer dies 50 and 60 are guide rails intermittently in the ± y direction by the cam 70 only by a distance corresponding to the width difference between the plurality of lamina members 1. 80 is conveyed (sliding), wherein the first conveying die 50 stamps one side 3 of the lamina member 1 and the second conveying die 60 is the other side of the lamina member 1. Stamp (4).

Since the distance that the first and second transfer dies 50 and 60 have to move is very short, the load applied to the step motor 90 and the friction caused by the movement of the first and second transfer dies 50 and 60 are reduced. Can be. In addition, the process of manufacturing pencil cores is very fast and the stamping positioning accuracy is high.

As described above, in the pencil core manufacturing apparatus, the cam 70 repeatedly rotates and stops at a high speed, and the first and second transfer dies 50 and 60 move in the ± y direction by the operation of the cam 70. The lamina member 1 is manufactured by stamping a metal strip while being transported (sliding).

However, when the cam 70 does not operate normally, the first and second transfer dies 50 and 60 cannot be transferred (slid) normally, and thus the lamina members 1 having the same width are continuously formed. There is a problem that the poor pencil core (5) is made to be made.

In particular, when the cam 70 is fixed to the position where the widest lamina member 1 is manufactured, that is, the cam 70 does not rotate, so that the first and second transfer dies 50 and 60 have a wide width. When the widest lamina member 1 is continuously manufactured and the widest lamina member 1 thus produced is continuously laminated to the lamination barrel, there is a problem that the lamination barrel may be broken (destructed).

The laminated barrel has a structure that presses the widest lamina member (1) from the side in order to laminate the blanked lamina member (1), the widest lamina member (1) is inside the laminated barrel If the lamination is continued, the lamination barrel may be damaged (destructed) because the pressure applied by the lamina member 1 increases.

In particular, the laminated barrel of the pencil core manufacturing apparatus has a smaller area of contact between the inner circumferential surface of the laminated barrel and the pencil core than the laminated barrel of the conventional laminated core manufacturing apparatus, and thus the laminated barrel exerts a higher pressure on the pencil core. More trouble.

The present invention has been devised to solve the above problems, and it is possible to detect whether the device is operating normally, in particular, whether the cam is rotating normally, and in case of abnormal operation, the defective pencil core can be stopped continuously. It is an object of the present invention to provide a pencil core manufacturing apparatus that can be prevented from being manufactured.

Another object of the present invention is to provide a pencil core manufacturing apparatus that can prevent the laminated barrel from being damaged.

In order to achieve the above object, the pencil core manufacturing apparatus according to the present invention, the lower die is supplied with a metal strip on the upper surface; An upper die stamping a metal strip while being lifted with respect to the lower die by a driving force transmitted from the driving source; It is installed on the lower die and transferred at predetermined time intervals by a distance corresponding to the width difference of the plurality of lamina members in a direction transverse to the supply direction of the metal strip, while receiving the driving force of the upper die to receive the work of the lamina member A first transfer die for stamping the side surface 3; It is installed on the lower die and is transferred at a predetermined time interval by a distance corresponding to the width difference of the plurality of lamina members in a direction transverse to the supply direction of the metal strip, while receiving the driving force of the upper die to receive the other A second transfer die for stamping the side surface 4; A first cam assembly rotated at predetermined time intervals to achieve the transfer of the first transfer die; A second cam assembly rotated at predetermined time intervals to achieve the transfer of a second transfer die; And a sensor unit installed on at least one of the first and second cam assemblies to detect whether the at least one rotation is normally performed.

The sensor unit may include a sensor hole formed in at least one cam 410 or 510 of the first and second cam assemblies; And a sensor for sensing the sensor hole. The sensor transmits a signal regarding whether the sensor hole is detected to the controller, and the controller determines whether the cams 410 and 510 are normally rotated according to whether the sensor detects the sensor hole and the cams 410 and 510. In case of abnormal rotation, an alarm signal can be generated.

Whether the cams 410 and 510 are normally rotated may be determined by comparing the number of manufactured lamina members with the number of times the sensor detects the sensor hole.

On the other hand, when the cam 410, 510 is rotated one time when manufacturing one pencil core, it is determined whether the cam 410, 510 is rotated once when all the lamina members constituting the pencil core is manufactured. By sensing the sensor unit, it is possible to detect normal operation.

The pencil core manufacturing apparatus may include a reset button for stopping the operation when the cams 410 and 510 are abnormally operated.

Pencil core manufacturing apparatus according to the present invention has the following effects.

First, it is possible to detect whether the device is operating normally, in particular, whether the cam is rotating normally, and to stop the device in the case of abnormal operation, thereby preventing the defective pencil core from being continuously manufactured.

Second, the laminated barrel can be prevented from being broken.

1 is a perspective view showing a typical pencil core.
FIG. 2 is a cross-sectional view taken along line II-II ′ of FIG. 1.
Figure 3 is a perspective view showing a pencil core manufacturing apparatus according to the prior art.
4 is a plan view showing a cam provided in the pencil core manufacturing apparatus of FIG.
Figure 5a is a plan view showing a pencil core manufacturing apparatus according to a preferred embodiment of the present invention.
5B is an enlarged view of portion A of FIG. 5A.
6A is a cross-sectional view illustrating a second transfer die and a second cam assembly provided in the pencil core manufacturing apparatus of FIG. 5A.
6B is an enlarged view of a portion B of FIG. 6A.
FIG. 6C is an enlarged view of portion C of FIG. 6A.
Figure 7 is a side cross-sectional view showing the pencil core manufacturing apparatus of Figure 5a.
8 is a perspective view illustrating a sliding plate provided in the pencil core manufacturing apparatus of FIG. 5A.
FIG. 9 is a plan view showing that the metal strip supplied to the pencil core manufacturing apparatus of FIG. 5A is stamped.
FIG. 10 is a plan view illustrating a driving motor and an index driver included in the pencil core manufacturing apparatus of FIG. 5A.
FIG. 11 is a plan view illustrating a first cam provided in the pencil core manufacturing apparatus of FIG. 5A.
12 is a plan view illustrating a second cam provided in the pencil core manufacturing apparatus of FIG. 5A.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

The present invention is an improvement of the pencil core manufacturing apparatus (laminated core manufacturing apparatus) disclosed in the Republic of Korea Patent No. 10-0510059. That is, the present invention improves the problems (as described in the background technology of the invention) of the pencil core manufacturing apparatus. Therefore, the contents disclosed in Korean Patent Registration No. 10-0510059 is incorporated by reference herein.

Figure 5a is a plan view showing a pencil core manufacturing apparatus according to a preferred embodiment of the present invention, Figure 5b is an enlarged view of a portion A of Figure 5a, Figure 6a is a second transfer die and the second transfer die provided in the pencil core manufacturing apparatus A cross sectional view showing a cam assembly.

Referring to the drawings, the pencil core manufacturing apparatus is a first and second transfer die which is transferred at predetermined time intervals in the direction transverse to the moving direction of the lower die 110, the upper die 330, and the metal strip (7). Among the first and second cam assemblies 400 and 500 for transferring the 200 and 300, the first and second transfer dies 200 and 300, and the first and second cam assemblies 400 and 500. It includes at least one sensor unit installed. Meanwhile, in FIG. 5A, the upper die 330 is omitted for convenience of understanding.

The lower die 110 has a metal strip 7 moved to the upper surface thereof. The lower die 110 has a through hole (not shown), a counter hole (not shown), a punch hole (not shown), and an interlock tab hole (not shown) for stamping the metal strip 7. ) And blanking dies 130 and 135 are installed.

The upper die 330 stamps the metal strip 7 while raising and lowering the lower die 110. The lower surface of the upper die 330 has a through hole, a counter hole, an interlock tab hole, and a pin punch for stamping the metal strip 7 corresponding to the blanking dies 130 and 135, respectively (through hole 7a of FIG. 9). ), Counter hole punch (former hole 7b is formed, not shown in the figure), interlock tab punch (interlock tab 2 is formed, not shown in figure), blanking A punch (blanking the lamina member. Not shown in the figure) is provided. Accordingly, as shown in FIG. 9, when the metal strip 7 is supplied to the upper surface of the lower die 110, the metal strip 7 is stamped by the lifting of the upper die 330 so that the through hole 7a and the counter hole are provided. 7b, side holes 7c and 7d, interlock tabs 2 are formed, and the lamina member 1 is blanked.

Lifting of the upper die 330 is made by a driving motor (610 of FIG. 10). Continuous rotation of the drive motor 610 is converted to the lifting motion of the upper die 330 by a predetermined cam means (not shown). The configuration for converting the continuous rotation of the drive motor 610 into the lifting motion of the upper die 330 is well known to those skilled in the art and a general laminated core manufacturing apparatus (or pencil core manufacturing apparatus). Since it is adopted in the detailed description thereof will be omitted.

In addition, a process of forming the through hole 7a in the metal strip 7 using a pin punch, a process of forming the counter hole 7b in the metal strip 7 using a counterhole punch, and an interlock tap punch To form the interlock tab 2 on the metal strip 7, and to cut the lamina member 1 using a blanking punch, and then to laminate the laminated barrel (131 in FIG. 7) (136 in FIG. 7). Since it is disclosed in the Republic of Korea Patent No. 10-0510059 or already known technology will not be described in detail here.

The first transfer die 200 is stamped by the first cam assembly 400 at predetermined time intervals, stamping one side 3 of the lamina member 1 (step IV in FIG. 9), and the second transfer die. The stamp 300 is stamped on the other side 4 of the lamina member 1 while being transferred at a predetermined time interval by the second cam assembly 500 (step VI of FIG. 9). Here, the predetermined time interval means a time when the upper die 330 is raised and lowered once.

The first and second transfer dies 200 and 300 have the same structure. Therefore, in the present specification, only the second transfer die 300 will be described in order to avoid duplication of description.

The second transfer die 300 includes a lower block 310 and an upper block 320 installed to be spaced apart from the lower block 310 by a predetermined interval. The lower block 310 and the upper block 320 are simultaneously moved by the second cam assembly 500.

The lower block 310 is installed in the groove 111 formed in the lower die 110 to slide in a ± y direction. The lower block 310 is connected to the upper block 320 by the shaft 311. Therefore, when the lower block 310 slides, the upper block 320 also moves together with the lower block 310.

The upper surface of the lower block 310 is formed with a punch hole (not shown) in which the side punch 321 is inserted. The metal strip 7 moves to the upper surface of the lower block 310, and the side holes 7d are formed by inserting the side punch 321 into the punch hole.

The side 312 of the lower block 310 is in contact with the second cam 510 and the side 313 of the lower block 310 is in contact with the spring 314. Therefore, when the second cam 510 is rotated, the lower block 310 is moved while sliding in the groove 111 of the lower die 110. That is, when the second cam 510 is rotated, the lower block 310 moves in the ± y direction. At this time, the spring 314 pushes the lower block 310 in the -y direction to the side surface of the lower block 310. 312 is always in contact with the second cam (510).

Meanwhile, as shown in FIGS. 5B and 6B, a bearing 315 may be installed on the side surface 312 of the lower block 310. The bearing 315 reduces the frictional force between the second cam 510 and the side 312 so that the lower block 310 can slide smoothly in the ± y direction.

In addition, grooves 316 are formed in the side surfaces 312 and 313 of the lower block 310 in the y direction, and guide grooves 113 are inserted into the grooves 316. The guide protrusion 113 is formed to be fixed to the lower die 110. When the lower block 310 slides in the ± y direction, the guide protrusion 113 cooperates with the recess 316 to prevent the lower block 310 from moving in the ± x direction (left and right directions).

6A and 7, a sliding plate 390 may be installed between the lower surface 317 of the lower block 310 and the bottom of the groove 111. Meanwhile, in FIG. 7, the illustration of the upper die 330 is omitted.

An oil (not shown) is applied to the sliding plate 390 so that the sliding of the lower block 310 is performed well, as shown in FIG. 8, the sliding plate 390 has an oil groove in the y direction ( 392) is preferably formed long. Part of the oil applied to the sliding plate 390 is stored in the oil groove 392, the oil stored in the oil groove 392 is slightly moved to the surface of the sliding plate 390 to the first, second transfer die ( 200) to facilitate the sliding of (300). The oil not only assists the sliding of the lower block 310 but also reduces the wear of the lower block 310 and the flat plate 390.

The oil groove 392 may be formed in a curved shape extending in the y direction. As an alternative to the curved shape, the oil groove may be formed in a straight shape extending in the y direction.

The sliding plate 390 may be installed not only between the bottom surface 317 and the bottom of the groove 111, but also between the side surface 318 of the lower block 310 and the side surface of the groove 111. Furthermore, the sliding plate 390 may be installed between the lower blocks 210 and 310. In this case, the oil grooves 392 may be formed on both sides of the sliding plate 390.

Forming the oil groove 392 in the sliding plate 390 and applying the oil to the sliding plate 390 is a configuration of the guide rail (80 in Fig. 3) and the guide groove (Fig. 3) in the existing pencil core manufacturing apparatus 51) can reduce the wear rate of the product (pencil core) by effectively guiding the sliding of the first and second transfer dies (200, 300) by reducing wear and reducing wear. have.

On the other hand, as an alternative to installing the sliding plate 390, the oil groove on the bottom and side of the groove 111, that is, the surface of the lower die 110 in contact with the first and second transfer die 200,300 And oil may be applied to the surface. The oil groove formed on the surface of the lower die 110 is also formed along the direction in which the first and second transfer dies 200 and 300 slide (± y direction), similarly to the oil groove 392.

As such, the pencil core manufacturing apparatus according to the present invention facilitates sliding of the first and second transfer dies 200 and 300 using a sliding plate 390 and reduces wear, and guide protrusions 113 and grooves ( The first and second transfer dies 200 and 300 are not shaken in the ± x direction (ie, the left and right directions) by using 316.

The upper block 320 has a plurality of side punches 321 installed on the lower surface thereof. The side punch 321 drills the other side 4 of the lamina member 1 (ie, drills a 7d portion in the VI process of FIG. 9), and the side punch provided in the first transfer die 200. The punch drills one side 3 of the lamina member 1 (ie, the 7c portion in the IV process of FIG. 9).

The number of side punches 321 is the same as the number of lamina members 1 produced at one time. In the drawing, since five lamina members are manufactured at once, five side punches 321 are installed in the upper block 320.

The upper block 320 is installed on the upper portion of the lower block 310, it is installed on the shaft 311 to be able to move up and down along the shaft 311.

A guide block 360 may be installed between the upper block 320 and the lower block 310 to guide the lifting and lowering of the side punch 321. The guide block 360 is installed on the shaft 311 and the lower block 310 so that its position is fixed. The guide block 360 is formed with a guide hole 361 through which the side punch 321 can be inserted. The side punch 321 penetrates the guide hole 361 to stamp the metal strip 7. .

The lowering of the upper block 320 is made by the pressing force of the upper die 330, the raising of the upper block 320 is made by the elastic restoring force of the spring 363. The spring 363 is installed around the shaft 311 between the upper block 320 and the guide block 360. The spring 363 has a rising restoring force on the upper block 320 so that the lower upper block 320 can be returned to its original position. to provide.

The upper die 330 includes a frame 331, a lever 333 installed to be slidable in the sliding groove 332 formed in the frame 331, a fixing block 336 installed to contact the lever 333, and a lever. A cylinder 340 for sliding the 333, and an elastic member for pulling up the fixed block 336.

A sliding groove 332 is formed in the y direction on the lower surface of the frame 331. The lever 333 is installed in the sliding groove 332 to be slidable in the ± y direction. The protrusion 334 and the recess 335 are repeatedly formed on the bottom surface of the lever 333. One end of the lever 333 is connected to the cylinder 340, which pushes or pulls the lever 333 in the ± y direction.

The fixed block 336 is installed on the lower surface of the lever 333. The groove 337 and the protrusion 338 are repeatedly formed on the upper surface of the fixing block 336. The protrusion 338 mates with the recess 335 and the recess 337 mates with the protrusion 334.

The elastic member includes a connecting rod 342 connected to the fixing block 336 and a spring 344 pulling the connecting rod 342 upward (+ z direction). The connecting rod 342 is installed to be slidable in the ± z direction to the frame 331, the lower end of which is connected to the fixed block 336. Accordingly, the elastic member provides a force to pull the fixing block 336 upwards (+ z direction), the fixing block 336 may maintain a close contact with the lever 333.

When the projection 334 and the projection 338 are in contact with each other (shown in FIGS. 6A and 6C), the cylinder 340 is operated to move the lever 333 in the + y direction or the -y direction. ) And the groove 337 abuts, and accordingly, the fixing block 336 rises upward (+ z direction) by the elastic force of the spring 344. When the fixing block 336 rises upward, the upper die Even if 330 presses the upper block 320, the metal strip 7 is not punched.

On the other hand, the pencil core manufacturing apparatus according to the present invention does not punch the side surface of the lamina member 1 when manufacturing the widest lamina member (1). That is, when manufacturing the widest lamina member 1, in the IV process and the VI process of FIG. 9, the side punch 321 does not punch the metal strip 7.

Accordingly, when manufacturing the widest lamina member 1, the cylinder 340 is operated to move the lever 333 in the ± y direction to raise the fixed block 336 upwards (+ z direction). .

As described above, the first cam assembly 400 moves the first transfer die 200 in the ± y direction, and the second cam assembly 500 moves the second transfer die 300 in the ± y direction. . The first and second cam assemblies 400 and 500 have a structure except that the sensor unit is installed in the second cam assembly 500 and the shapes of the first and second cams 410 and 510 are different from each other. same. Accordingly, the same parts of the first and second cam assemblies 400 and 500 will be described only with respect to the second cam assembly 500 in order to avoid duplication of description. Different parts of the structure of 500 will be described.

The second cam assembly 500 includes a second cam 510, a first driven pulley 520 that receives the driving force of the index drive 560, and a second follower that receives the driving force from the first driven pulley 520. A pulley 530.

As shown in FIG. 12, the second cam 510 has a portion whose outer circumferential surface protrudes outward as compared to a complete circle (shown in dashed lines). In addition, the second cam 510 does not have a constant curvature but has a curved portion.

In contrast, as shown in FIG. 11, the first cam 410 has a portion whose outer circumferential surface is inward as compared with a complete circle (shown in dashed lines) (the first cam 410 has a constant curvature. Not having the curved portion is the same as the second cam 510).

Therefore, the first transfer die 200 conveyed by the first cam 410 stamps one side 3 of the lamina member 1, and the second transfer die conveyed by the second cam 510. 300 stamps the other side 4 of the lamina member 1.

In the present invention, since the outer circumferential surface of the first and second cams 410 and 510 is in contact with the side surface 312 of the lower block 310 or preferably the bearing 315, the existing cam follower 72 and Compared to the configuration using the cam groove 74, it is possible to reduce the wear of the first and second cams 410 and 510, thereby increasing the service life of the first and second cams 410 and 510. There is this.

The second driven pulley 530 is installed on the lower surface of the second cam 510. The second driven pulley 530 receives the rotational force from the first driven pulley 520 to rotate the second cam 510. The second driven pulley 530 and the first driven pulley 520 are connected by a belt.

The first driven pulley 520 is rotated by receiving a rotational force from the index drive 560. The index drive 560 converts the continuous rotation of the drive motor 610 into intermittent rotation. The intermittent rotation means rotation at predetermined time intervals, and the predetermined time interval means a time interval in which the upper die 330 is elevated once.

As shown in FIG. 10, the index drive 560 includes a worm 563 rotatably installed between a pair of brackets constituting the main body, and a worm wheel 564 installed to engage the worm 563.

The worm 563 is installed side by side with the drive motor 610, the driven pulley 561 is coupled to the worm 563, the rotational force of the drive motor 610 is transmitted by the belt 611. A helical thread is formed on the outer circumferential surface of the worm 563.

The worm wheel 564 is installed so that its rotation axis is orthogonal to the rotation axis of the worm 563, and the engaging protrusion 565, which is engaged with the helical thread, is formed on the outer circumferential surface at predetermined intervals. In addition, the index pulley 567 is coupled to the rotation axis of the worm wheel 564, the index pulley 567 is connected to the first driven pulley 520 by a belt to transmit a rotational force. Preferably, the tension pulley 570 may be further provided to adjust the tension of the belt.

The driving motor 610 rotates continuously, and the rotational force of the driving motor 610 is transmitted to the upper die 330 through the belt 613 to elevate the upper die 330. In addition, the continuous rotational force of the drive motor 610 is transmitted to the worm 563 through the belt 611 to rotate the worm 563 continuously.

On the other hand, a helical thread is formed around the worm 563, and the helical thread includes an inclined section 568 and a horizontal section 569. The worm wheel 564 is not rotated while the engagement protrusion 565 is in contact with the horizontal section 569, and the worm wheel 564 is rotated while the engagement protrusion 565 is in contact with the inclined section 568. Therefore, the continuous rotation of the drive motor 610 is converted to the intermittent rotation of the worm wheel 564, the intermittent rotation of the worm wheel 564 is the first, second driven pulleys 520, 530 through the belt Are sequentially transmitted to the second cam 510 to rotate intermittently.

As described above, in the pencil core manufacturing apparatus according to the present invention, since the lifting and lowering of the upper die 330 and the rotation of the second cam 510 are performed by the same driving motor 610, the lifting and lowering of the upper die 330 is performed. Rotation of the cam 510 is linked with each other. Accordingly, the second cam 510 may be prevented from rotating while the upper die 330 presses the upper block 320 to perform punching (stamping), thereby reducing the failure of the device and the defective rate of the product. have.

The sensor unit detects whether the device operates normally, in particular, whether the second cam 510 rotates normally. The sensor unit includes a sensor hole 551 formed in the second cam 510, and a sensor 550 for sensing the sensor hole 551.

Since one sensor hole 551 is formed in the second cam 510, the second cam 510 is rotated once when the sensor 550 detects the sensor hole 551. As such, the sensor 550 detects whether the device is malfunctioning by detecting the sensor hole 551.

As described above, the second cam 510 is rotated to move the second transfer die 300 to produce a plurality of lamina members 1 having different widths, and the lamina members 1 thus manufactured. Is stacked to make a pencil core (5). By the way, for example, when the device malfunctions and the second cam 510 does not rotate, the lamina member 1 having the same width is continuously made, and the lamina member 1 is continuously laminated with the barrel ( Stacking on the 131 (136), a problem that a bad pencil core is made. In particular, when the lamina member 1 having the widest width is continuously made and laminated to the laminated barrels 131 and 136, the laminated barrels 131 and 136 may be damaged.

Meanwhile, the pencil core 5 is formed by stacking a plurality of lamina members 1 having different widths. For example, the pencil core 5 has a plurality of lamina members 1 having 24 different widths. ) Is formed by lamination, the interlock tab 2 is not formed in the lamina member 1 to be laminated first, but the counter hole 7b is formed. As is known, the counter ball 7b is formed to penetrate the lamina member 1, and because the counter ball 7b cannot be engaged with the interlock tab 2 of the lower lamina member 1, Separate pencil core (5) is to be made.

When the counter hole 7b is formed once (that is, when 24 lamina members are made), when the second cam 510 is rotated once, each time the counter hole 7b is formed once, the sensor The 550 should detect the sensor hole 551 once. By the way, when the device is broken, the one-time formation of the counter hole 7b and the detection of the sensor hole 551 of the sensor 550 do not match, and the sensor 550 detects such a case.

In addition, the controller may compare the number of times the sensor 550 detects the sensor hole 551 with the number of manufactured lamina members 1 to determine whether the apparatus is in normal operation. For example, when one pencil core 5 is manufactured, when the cams 410 and 510 of the first and second cam assemblies 400 and 500 are rotated once, one pencil core 5 is configured. When all of the lamina members 1 are manufactured, whether the sensor 550 detects the sensor hole 551 once or not may indicate whether the apparatus is in normal operation. On the other hand, whether the lamina member (1) constituting one pencil core (5) is manufactured whether or not it can be known by counting the number of lifting of the upper die (330).

In this way, the sensor 550 detects whether the device is operating normally by detecting the sensor hole 551, in particular, whether the second cam 510 is being rotated normally. The sensor 550 transmits the signal to a controller (not shown), and the controller generates an alarm signal or the like. By the alarm signal, the operator presses a reset button (not shown in the drawing) to stop the operation of the device, removes the cause of the failure, and removes the defective pencil core 5 in the stacked barrels 131 and 136. Then restart the device. The reset button may be, for example, a button for cutting off power supplied to the device.

The sensor unit may be installed only in the second cam assembly 500, but may be installed in both the first and second cam assemblies 400 and 500, and may not be installed in the second cam assembly 500. 400 may be installed only.

Then, the operation of the pencil core manufacturing apparatus according to the present invention will be described with reference to the drawings. In addition, the hatched part in FIG. 9 shows the part which the stamping operation was performed in each process.

When the metal strip 7 is supplied to the apparatus, the metal strip 7 is conveyed by one pitch in the + x direction at predetermined time intervals.

First, in the step I, a through hole 7a is formed in the metal strip 7. The through holes 7a are formed in the metal strip 7 every pitch.

The metal strip 7 in which the through holes 7a are formed is conveyed one pitch. In the II process, the counter holes 7b are formed in the metal strip 7. The counter hole 7b is not formed every time, but is formed only in one lamina member 1 of the 24 lamina members 1 when one pencil core 5 consists of 24 pieces. If the counter hole 7b is not formed, no operation is made in step II.

The metal strip 7 in which the counter hole 7b is formed is conveyed 1 pitch, and is then in the standby state (idle process) in step III.

Subsequently, in the IV process, one side 3 of the lamina member 1 is stamped. After the first cam 410 is rotated to move the side punch in the ± y direction, the upper die 330 is lowered to press the upper block 320 to punch the metal strip 7.

As the first cam 410 is rotated, the side punches are moved in the + y direction or the -y direction, whereby the lamina members 1 having different widths can be manufactured.

After the IV process, the process is in the standby state (idle process) in the V process.

Next, in the VI process, the other side surface 4 of the lamina member 1 is stamped. After the second cam 510 is rotated to move the side punch 321 in the ± y direction, the upper die 330 descends to press the upper block 320 so that the side punch 321 is the metal strip 7. Punch).

As the second cam 510 is rotated, the side punch 321 is moved in the + y direction or the -y direction, whereby the lamina member 1 having different widths can be manufactured.

After the VI process, in the VII process, an atmospheric state (idle process) is obtained.

Subsequently, the interlock tab 2 is formed at VIII. The interlock tab 2 serves to couple the upper and lower lamina members 1 to each other.

After the VIII process, the lamina member 1 is blanked in the IX process. In the figure, three of the five lamina members 1 are blanked in the IX process and two are blanked in the XI process. Thus, the lamina member 1 is separated and blanked without blanking all at once in order to prevent the metal strip 7 from bending or cutting due to the blanking. On the other hand, the X process between the IX process and the XI process is an idle process in which no work is performed.

In the IX and XI processes, the blanked lamina member 1 is first combined with the blanked lamina member 1 in the laminated barrel.

1: lamina member 5: pencil core
7: metal strip 200: first transfer die
300: second transfer die 400: first cam assembly
500: second cam assembly 550: sensor
551: sensor hole

Claims (5)

In the apparatus for manufacturing a pencil core formed by laminating a plurality of lamina members having different widths,
A lower die for supplying a metal strip to the upper surface;
An upper die stamping a metal strip while being lifted with respect to the lower die by a driving force transmitted from the driving source;
It is installed on the lower die and transferred at predetermined time intervals by a distance corresponding to the width difference of the plurality of lamina members in a direction transverse to the supply direction of the metal strip, while receiving the driving force of the upper die to receive the work of the lamina member A first transfer die for stamping the side surface 3;
It is installed on the lower die and is transferred at a predetermined time interval by a distance corresponding to the width difference of the plurality of lamina members in a direction transverse to the supply direction of the metal strip, while receiving the driving force of the upper die to receive the other A second transfer die for stamping the side surface 4;
A first cam assembly rotated at predetermined time intervals to achieve the transfer of the first transfer die;
A second cam assembly rotated at predetermined time intervals to achieve the transfer of a second transfer die; And
And a sensor unit installed on at least one of the first and second cam assemblies to detect whether the at least one rotation is normally performed. The method of claim 1,
Sensor part,
A sensor hole formed in the at least one cam 410 or 510; And
It includes; a sensor for detecting a sensor hole,
The sensor transmits a signal regarding whether the sensor hole is detected to the controller, and the controller determines whether the cams 410 and 510 are normally rotated according to whether the sensor detects the sensor hole and the cams 410 and 510. Pencil core manufacturing apparatus, characterized in that for generating an alarm signal when the abnormal rotation. The method of claim 2,
The pencil core manufacturing apparatus, characterized in that the at least one of the rotation is normally made by comparing the number of the lamina member manufactured and the number of times the sensor detects the sensor hole. The method of claim 1,
When manufacturing one pencil core, the cams 410 and 510 of the first and second cam assemblies are rotated once, and the at least one cam 410 when all the lamina members constituting the pencil core are manufactured. Pencil core manufacturing apparatus characterized in that it detects whether or not the normal operation by the sensor unit 510 is rotated one. 5. The method according to any one of claims 1 to 4,
Pencil core manufacturing apparatus characterized in that it comprises a reset button for stopping the operation when at least one of the abnormal operation.

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