JP7385226B1 - Laminated steel plate manufacturing device and laminated steel plate manufacturing method - Google Patents

Abstract

[Problem] To provide a laminated steel plate manufacturing apparatus and a laminated steel plate manufacturing method capable of manufacturing pressed steel plates and laminated steel plates having protrusions on the periphery and forming blank holes that nullify the protrusions with a simple configuration. . A laminated steel sheet manufacturing apparatus 1 is capable of a press section 2 forming M protrusions 35 on the periphery of a pressed steel sheet 31. The first die D1 of the first press section 21 is rotatable in one direction by 360/N degrees around the center C1 of the first press section every time the press steel plate 31 is punched. The second press section 22 includes a second punch P2 and a second die D2 that can form N protrusions 35 along the periphery of the press steel plate 31 punched. The third press part 23 is capable of punching blank holes 3 in a range that includes (NM) protrusions 35 out of the area in which N protrusions 35 can be formed in the second press part 22. , the punching position can be changed by 360/N degrees in one direction each time the steel plate material 30 is punched. [Selection diagram] Figure 1

Description

The present invention relates to a progressive laminated steel plate manufacturing apparatus and a laminated steel plate manufacturing method using the laminated steel plate manufacturing apparatus.

Conventionally, various laminated steel plate manufacturing apparatuses and laminated steel plate manufacturing methods have been proposed. For example, a strip-shaped metal plate is intermittently sent out and the inner diameter region is punched out from the metal plate to form a plurality of shaft holes provided with key protrusions such that each protrusion faces at a different angle. Further, the rotation includes punching the outer diameter region including each shaft hole from the metal plate to form a plurality of punched members, and rolling the plurality of punched members so that the protrusions overlap each other. A method for manufacturing a secondary laminated core has been proposed.

For example, according to the description in Patent Document 1, a plate piece with a plurality of protrusions formed on the periphery is punched out of a thin plate-like raw material, and the punched plate piece is rolled and stacked on other plate pieces. In the punching method, in order to punch out the plate piece, a punching blade in which a number of protrusion-forming blade parts is formed that is greater than the number of protrusions on the plate piece is used, and when the plate piece is punched out by the punching blade, the plate piece is punched out. First, forming blank holes for disabling the formation of the protrusions at positions corresponding to the protrusion blades on the raw material and having a smaller number of positions than the protrusion blades, and As the punching of the raw material progresses, the position of the blank hole is displaced.

Therefore, in the punching method of the present invention, prior to punching out a plate piece with the punching blade, the formation of a protrusion is disabled on the raw material at a position corresponding to a predetermined protrusion cutting edge on the punching blade. Blank holes are pre-formed for this purpose. Thereafter, a plate piece having a plurality of protrusions on the periphery is punched out using a punching blade having a plurality of protrusion blades. In this case, the number of protrusion cutting edges of the punching blade is set to be greater than the number of protrusions on the plate piece. Therefore, among the plurality of protrusion cutters on the punching blade, a predetermined protrusion cutter corresponds to a blank hole previously formed on the raw material, and the protrusion cutter by the protrusion cutter corresponds to a blank hole previously formed on the raw material. The formation of protrusions is disabled and the number of protrusions formed is limited.

According to this, a plate piece having a plurality of protrusions on the periphery can be formed by punching without creating recesses at the bases on both sides of the protrusions. Therefore, it is stated that there is no fear that excessive stress will be concentrated on the bases on both sides of the protrusion, and that the required fixing strength can be ensured.

Japanese Patent Application Publication No. 2011-36039

However, the invention described in Patent Document 1 has the following problems. When two key-shaped protrusions are formed on the rotor core pieces at an interval of 180 degrees, and the rotor core pieces are rotated 90 degrees and fixed in a stacked state, the blank holes are filled with two stations. need to be formed. That is, at the first station, a pair of blank holes are punched out at an interval of 180 degrees. Further, at the second station, a pair of blank holes are punched at positions displaced by 90 degrees with respect to the pair of blank holes formed at the first station. Blank holes are punched out alternately at the first station and at the second station.

This is a necessary step to align the key-shaped protrusions when the rotor core pieces are rotated 90 degrees and stacked, but two stations are required. Depending on the number of key-shaped protrusions in the rotor core piece, the number of stations for punching blank holes may be two or more, which increases the size of the entire apparatus. Furthermore, since the step of punching out the blank holes spans two steps, the manufacturing time increases. Furthermore, if the number of key-shaped protrusions changes, the device must be modified each time, and there is a problem that the ability to respond to changes in the shape of the rotor core piece is poor.

The purpose of the present invention is to solve the problems of the prior art, and to make the protrusions nullified with a simple structure in order to manufacture laminated steel plates by punching and rolling pressed steel plates having protrusions on the periphery. It is an object of the present invention to provide a laminated steel sheet manufacturing apparatus and a laminated steel sheet manufacturing method capable of forming blank holes.

A laminated steel plate manufacturing apparatus according to a first aspect of the present invention is an apparatus for punching and laminating a belt-shaped steel plate material, which is intermittently conveyed in a conveyance direction, into an annular pressed steel plate, and which is perpendicular to the conveyance direction. It includes an upper die and a lower die that are relatively movable in the vertical direction, a conveying device that conveys the steel plate material, and a plurality of press sections that punch out the steel plate material, and the press section is configured to press the upper die into the upper die. A punch is provided, the lower mold is provided with a die, a protrusion can be formed on the periphery of the press steel plate, N is a natural number, M is a natural number smaller than N, and the press part M protrusions can be formed on the steel plate, and the press section includes a first press section that can punch out the outer shape of the press steel plate, and a second press section upstream of the first press section in the conveying direction. Further, a third press section is provided upstream of the second press section, and the first die of the first press section rotates 360/N degrees in one direction around the center of the first press section every time the press steel plate is punched. The second press section is rotatable, and includes a second punch and a second die capable of forming N protrusions along the periphery of the press steel plate, and the third press section is rotatable. , out of the area in which N protrusions can be formed in the second press part, blank holes can be punched in a range that includes (NM) protrusions, and each time the steel plate material is punched, Further, the position at which the blank hole is punched can be changed in the one direction by 360/N degrees.

According to this, the second press section of the laminated steel sheet manufacturing apparatus includes a second punch and a second die that can form N protrusions along the periphery of the pressed steel sheet. The third press part is capable of punching blank holes in a range that includes (NM) protrusions out of the area in which N protrusions can be formed in the second press part, and punches out a steel plate material. Each time, the position at which the blank hole is punched can be changed in one direction by 360/N degrees. Therefore, the laminated steel plate manufacturing apparatus is capable of manufacturing pressed steel plates and laminated steel plates that have protrusions on the periphery, and has a simple configuration of only one press part, the third press part, to produce a blank that nullifies the protrusions. Holes can be formed.

The third press section of the laminated steel plate manufacturing apparatus includes N third punches and N third dies capable of punching out a region in which the protrusion is formed, and the upper mold. When descending, M of the N third punches are provided with a punch setting device that can set the steel plate material to a state in which they cannot punch out, and the punch setting device is configured to control the third press in the third press section. The third press part may be rotatable in the one direction by 360/N degrees around the center of the part each time the third press part punches the steel plate material.

In this case, since the laminated steel plate manufacturing apparatus includes a punch setting device in the third press section, it is possible to set a position where the blank hole is punched and a position where the blank hole is not punched. Furthermore, since the punch setting device can rotate in one direction by 360/N degrees each time a steel plate material is punched, the position at which the blank hole is punched can be easily changed.

Further, in the laminated steel plate manufacturing apparatus, the punch setting device includes a rotary disk, the rotary disk is rotatable around the center of the third press section in the third press section, and the M disc recesses are formed on the same radius centered on the center of the third press part, and the third punch is arranged on the same radius around the third press part center, and the M disc recesses are formed on the same radius centering on the third press part center, The third punch located directly below is in a state where it cannot punch out the steel plate, the (NM) third punches are capable of punching out the steel plate, and the rotary disk is in a state where it cannot punch out the steel plate. The press part may be rotatable in the one direction by 360/N degrees each time the press part punches the steel plate material.

In this case, in the laminated steel plate manufacturing equipment, the punch setting device is equipped with a rotary disk, and the third punch at the position corresponding to the concave portion of the disk can be set to a state in which punching is not possible. You can set the position where the blank hole is punched and the position where the blank hole is not punched.

Further, in the laminated steel sheet manufacturing apparatus, the punch setting device includes a backup pin between the rotary disk and each of the third punches in the vertical direction, and the upper die is lowered to lower the third punch. When the punch punches out the steel plate material, the third punch directly below the disc recess may be lifted up until the backup pin comes into contact with the disc recess, making it impossible to punch out.

In this case, the punch setting device includes a backup pin between the rotary disk and each third punch in the vertical direction. Since the rotary disk does not directly contact the third punch when rotating, the third punch can maintain vertical movement accuracy without being subjected to a load in the circumferential direction.

Further, the laminated steel plate manufacturing apparatus may include a rotating display board that rotates in synchronization with the rotating board, and the rotating display board may be capable of displaying the position of the disc recess. In this case, since the position of the disc recess can be confirmed by the rotary display, the state of the punch setting device can be confirmed during successive processes.

A laminated steel plate manufacturing method according to a second aspect of the present invention uses the laminated steel plate manufacturing apparatus to punch out the band-shaped steel plate material, which is intermittently conveyed in the conveyance direction, into the annular pressed steel plate and laminate the laminated steel plate. A method for manufacturing a steel plate, comprising: a first step in which, in the third press section, (NM) blank holes are punched out of a region in the second press section in which the N protrusions can be formed; a second step of forming the protrusion on the periphery of the pressed steel plate in the second press section; and a second step of punching out the outer shape of the press steel plate in the first press section; The first step includes a step of changing the punching position in the one direction by 360/N degrees each time the third press section punches the steel sheet material, The third step includes punching the outer shape of the pressed steel plate in the first press section, and then rotating the first die and the already laminated pressed steel plates in the one direction by 360/N degrees.

According to this, the laminated steel plate manufacturing method punches (NM) blank holes in the first step, and changes the punching position in one direction by 360/N degrees. Therefore, the blank hole position setting and punching can be performed only by the process in the third press section. The positions of the protrusions can be adjusted in the stacking direction by punching out a pressed steel plate having M protrusions on the periphery and performing rolling by rotating the plate by 360/N degrees in one direction.

1 is a plan view showing a laminated steel plate manufacturing apparatus 1a according to a first embodiment of the present invention, in which (a) shows the configuration of an upper die 4, and (b) shows changes in the state of a steel plate material 30 punched in each process. (c) shows the configuration of the lower mold 5. A state in which the rotary disk 8 and the first die D1 are rotated 45 degrees clockwise with respect to FIG. 1 is shown. A state in which the rotary disk 8 and the first die D1 are rotated 45 degrees clockwise with respect to FIG. 2 is shown. 3 is a plan view showing the punch setting device 7 in the third press section 23, in which (a) shows a state in which the rotary disk 8 is stopped and punching can be performed by the third press section 23, and (b) shows a state in which the rotary disk 8 is stopped and punching is possible. FIG. A state in which the position of the disc recess B is changed by rotating is shown. FIG. 7 is a plan view showing the operation of the punch setting device 7, in which (a) the disc recess B is at the position of the third punch P31, and (b) is a plan view showing the disc recess B moving from the position of the third punch P31 to the position of the third punch P32. (c) shows the state in which the disc recess B has transitioned to the position of the third punch P32, and (d) and (e) show the state in which the disc recess B has moved from the third punch P32 to the third punch P33. (f) shows a state in which the disc recess B has transitioned to the position of the third punch P33. FIG. 4B is a cross-sectional view taken along the line II in FIG. 4(b). 5(f) is a cross-sectional view taken along line II-II in FIG. 5(f). FIG. FIG. 3 is a plan view showing a pressed steel plate 31a. 9 is a cross-sectional view taken along section III-III in FIG. 8, showing a laminated steel plate 36a. 2 is a plan view showing a laminated steel plate manufacturing apparatus 1b according to a second embodiment of the present invention, in which (a) shows the configuration of an upper mold 4, and (b) shows changes in the state in which a steel plate material 30 is punched in each process. (c) shows the configuration of the lower mold 5. A state in which the rotary disk 8 and the first die D1 are rotated 60 degrees clockwise with respect to FIG. 10 is shown. It is a top view which shows the pressed steel plate 31b. It is a view from A in FIG. 12, showing the laminated steel plate 36b. FIG. 2 is a block diagram showing a control device 50 of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the laminated steel plate manufacturing apparatus 1 and the laminated steel plate manufacturing method which embody this invention are demonstrated. Note that the detailed description and the drawings referred to are used to explain technical features that can be adopted by the present invention. The present invention is not limited to these. The configurations shown in the drawings are not intended to be limiting, but are merely illustrative examples.

<<Configuration common to each embodiment of laminated steel plate manufacturing apparatus 1 >>
<Overall configuration>
A configuration common to the laminated steel plate manufacturing apparatus 1 according to the first aspect of the present invention will be explained. The explanation will be made with reference to FIGS. 1 to 14, but mainly the laminated steel plate manufacturing apparatus 1a of the first embodiment will be explained as an example. The laminated steel plate manufacturing apparatus 1 is an apparatus that punches and laminates a band-shaped steel plate material 30, which is intermittently conveyed in the conveyance direction, into an annular pressed steel plate 31. In particular, it is an apparatus that forms a protrusion 35 at a specific position on the inner circumferential edge and/or outer circumferential edge of a pressed steel plate 31, and performs rolling to produce a laminated steel plate 36. As shown in FIG. 1 and the like, the laminated steel plate manufacturing apparatus 1 includes an upper mold 4 and a lower mold 5 that are relatively movable in the vertical direction perpendicular to the conveyance direction, and a conveyance device 6 that conveys the steel plate material 30. , a plurality of press parts 2 for punching out a steel plate material 30 are provided. When the steel plate material 30 is moved to the plurality of press sections 2, a pilot hole 40 is formed to improve positional accuracy, and a pilot pin (not shown) is inserted when the steel plate material 30 is punched in each press section 2.

As shown in FIG. 1 and the like, the press section 2 includes an upper mold 4 with a punch P, a lower mold 5 with a die D, and can form a protrusion 35 on the periphery of a pressed steel plate 31. N is a natural number, and M is a natural number smaller than N. As shown in FIGS. 8 and 12, the press section 2 can form M protrusions 35 on the press steel plate 31. In the example shown in FIG. 8, M=1, and in the example shown in FIG. 12, M=3. As shown in FIGS. 1 to 3, as well as FIG. 10 and FIG. A second press section 22 and a third press section 23 are further provided upstream of the second press section 22.

The first press section 21 includes a first punch P1 and a first die D1. The first die D1 is rotatable in one direction by 360/N degrees around the center C1 of the first press portion each time the press steel plate 31 is punched. This angle is an angle at which the first die D1 is rotated when rolling the punched press steel plate 31 to the punched press steel plate 31. In the example shown in FIGS. 1 to 3, N=8, and the angle at which the first die D1 is rotated during rolling is 45 degrees.

As shown in FIG. 1 and the like, the second press section 22 includes a second punch P2 and a second die D2 that can form N protrusions 35 along the periphery of the press steel plate 31 punched. In addition, in the example shown in FIG. 1 etc., the second press part 22 consists of a second press part 22a on the downstream side in the conveyance direction and a second press part 22b on the upstream side, and the second punch P2a of the second press part 22a The second die D2a is configured to be able to punch out N protrusions 35. The second press section 22b includes a second punch P2b and a second die D2b.

As shown in FIG. 1 etc., the third press part 23 has a range that includes (NM) protrusions 35 out of the area where N protrusions 35 can be formed in the second press part 22. The blank hole 3 can be punched out, and the punching position can be changed in one direction by 360/N degrees each time the steel plate material 30 is punched out.

As shown in FIG. 1 etc., the protrusion 35 is formed by the third press part 23 and the second press part 22. That is, in the third press section 23, (NM) blank holes 3 for nullifying the protrusions 35 are formed in advance, and in the second press section 22, the second punch P2 at the position corresponding to the blank hole 3 is blank. It penetrates through the hole 3 and is in a missed state against the steel plate material 30. The second press part 22 forms protrusions 35 only in M areas where blank holes 3 are not formed.

<Effects due to overall configuration>
The overall configuration of the laminated steel plate manufacturing apparatus 1 described above provides the following effects. As shown in FIG. 1 etc., the second press section 22 of the laminated steel sheet manufacturing apparatus 1 includes a second punch P2 and a second die that can form N protrusions 35 along the periphery of the pressed steel sheet 31. Equipped with D2. The third press part 23 is capable of punching blank holes 3 in a range that includes (NM) protrusions 35 out of the area in which N protrusions 35 can be formed in the second press part 22. Each time the steel plate material 30 is punched out, the position at which the blank hole 3 is punched can be changed in one direction by 360/N degrees. Therefore, the laminated steel plate manufacturing apparatus 1 is capable of manufacturing a pressed steel plate 31 and a laminated steel plate 36 having a protrusion 35 on the periphery, and has a simple configuration of only the third press part 23, which is one press part 2, and has a protrusion 35 on the periphery. It is possible to form a blank hole 3 which nullifies the section 35.

<Configuration of third press section 23>
Next, the configuration of the third press section 23 will be explained. The third press section 23 includes N third punches P3 and N third dies D3 that can punch out the area in which the protrusion 35 is formed. When the upper die 4 is lowered, M of the N third punches P3 are provided with a punch setting device 7 that can set the steel plate material 30 to a state in which it cannot be punched.

As shown in FIG. 1 etc., the punch setting device 7 is formed in the third press section 23. As shown in FIG. As shown in FIGS. 4 and 5, the punch setting device 7 rotates the third press section center C3 in the third press section 23 by 360/N degrees each time the third press section 23 punches the steel plate material 30. It can be rotated in any direction. In the example shown in FIGS. 4 and 5, N=8, and the punch setting device 7 can rotate by 360/8=45 degrees. The third punch P3 and the third die D3 are each formed at N=8 locations so that the blank holes 3 can be formed at N=8 locations regardless of the positions of the blank holes 3. Although the detailed configuration of the punch setting device 7 will be described later, the punch setting device 7 sets a position where the blank hole 3 is punched and a position where the blank hole 3 is not punched in the third press section 23.

<Effects due to the configuration of the third press section 23>
According to the configuration of the third press section 23 explained above, the following effects are achieved. As shown in FIG. 4 and the like, the laminated steel plate manufacturing apparatus 1 includes the punch setting device 7 in the third press section 23, so that it is possible to set a position where the blank hole 3 is punched and a position where the blank hole 3 is not punched. Further, since the punch setting device 7 can rotate in one direction by 360/N degrees each time the steel plate material 30 is punched, the position at which the blank hole 3 is punched can be easily changed.

<Configuration of punch setting device 7>
Next, the configuration of the punch setting device 7 will be explained in detail. As shown in FIGS. 4 and 5, the punch setting device 7 includes a rotary disk 8, and the rotary disk 8 is rotatable around a third press section center C3 in the third press section 23. As shown in FIGS. 1(a) and 10(a), the rotary disk 8 has M pieces on the same radius R centered on the third press part center C3 on the lower surface 9 of the disk shown in FIG. 6 etc. A disc recess B is formed. In the example shown in FIG. 4 etc., M=1.

As shown in FIG. 1A and the like, the third punches P3 are arranged on the same radius R centered on the third press part center C3. As will be described later with reference to FIGS. 6 and 7, the third punch P3 located directly below the disc recess B is in a state where it cannot punch out the steel plate material 30, and the number of (NM) third punches P3 is as follows. The steel plate material 30 can be punched out. As an example, in the case shown in FIG. 5(a), the third punch P31 of the third punches P3 is located directly below the disc recess B, so that the steel plate material 30 cannot be punched out. The other third punches P32 to P38 can punch out the steel plate material 30. That is, as shown in FIG. 1(b) etc., blank holes 3 are punched at positions from the third punch P32 to the third punch P38.

The rotary disk 8 can rotate in one direction by 360/N degrees each time the third press section 23 punches out the steel plate material 30. In the example shown in FIG. 5, one direction is clockwise, the rotation is made by 45 degrees, the state of FIG. 5(a) changes to the state of FIG. 5(c), and the position of the disc recess B changes. FIG. 5A shows that the disc recess B is located at the third punch P31, and FIG. 5C shows that the disc recess B has moved to the third punch P32. Then, as shown in FIG. 2(b), the position where the blank hole 3 is punched changes. Further, when the rotary disk 8 rotates, the state shown in FIG. 5(d) changes to the state shown in FIG. 5(f), and the position where the blank hole 3 is punched changes as shown in FIG. 3(b). At this time, the disc recess B moves from the position of the third punch P32 to the position of the third punch P33. The angle at which the rotary disk 8 rotates is the same as the angle at which the first die D1 of the first press section 21 rotates, and the direction of rotation is also the same.

The configuration of the punch setting device 7 will be described in further detail with reference to FIGS. 4 to 7. As shown in FIG. 7, each member constituting the punch setting device 7 is configured to be rotatable with respect to a base 38 fixed to the upper mold 4. As shown in FIG. The rotary disk 8 is disposed below the base 38, is fixed to the rotary disk shaft 18 with a set screw 28, and rotates integrally with the rotary disk shaft 18. A ratchet cam 17 is arranged above the base 38 and similarly fixed to the rotary disk shaft 18. Furthermore, a belt pulley 33 is arranged above the cover 19 and is similarly fixed to the rotary disk shaft 18.

As shown in FIGS. 4, 5, and 7, a ratchet pin 14 that engages with the teeth of the ratchet cam 17 and a reversal prevention device 25 are arranged, and each is radially moved relative to the rotary disk shaft 18 by a spring 26. It can be pressed and moved. A swing bar 12 is arranged above the ratchet pin 14, and a swing pin 13 is fixed to the swing bar 12. A reversal prevention case 24 is attached above the reversal prevention 25. A slide bar 15 is arranged above the inversion prevention case 24 and the swing bar 12 and engages with the swing bar 12 via the swing pin 13. A cover 19 fixed to the upper mold 4 is arranged below the belt pulley 33. A bearing 29 is installed between the rotary disk shaft 18 and fixed members such as the cover 19 and the base 38.

Next, a mechanism for rotating the rotary disk 8 will be described with reference to FIGS. 4 to 6. As shown in FIG. 4, the slide bar 15 that engages with the swing pin 13 is movable along the width direction and is driven by an air cylinder 20. FIG. 4A shows a state in which the slide bar 15 is moved to the left side in the width direction, and is in a standby state in which the third press section 23 punches the steel plate material 30. When rotating the rotary disk 8, the slide bar 15 moves from the left side to the right side in the width direction. At this time, the slide bar 15 moves by the amount by which the swing bar 12 rotates through the swing pin 13 at an angle of 360/N degrees, which is 45 degrees in the example of FIG.

As shown in FIGS. 5(a) to 5(c), the ratchet pin 14 rotates in synchronization with the swing bar 12, engages with the teeth of the ratchet cam 17, and rotates the ratchet cam 17. The teeth of the ratchet cam 17 are shaped to engage with each other when the ratchet pin 14 moves to the right in the width direction, and the ratchet cam 17 rotates as the ratchet pin 14 rotates. Further, the reversal prevention 25 acts to prevent the ratchet cam 17 from rotating in the opposite direction during rotation. The reversal prevention 25 is a direction in which the teeth of the ratchet cam 17 engage in a direction opposite to that of the ratchet pin 14 . As shown in FIGS. 5(b) and 5(e), when the ratchet cam 17 rotates clockwise, the reversal prevention 25 moves in the radial direction of release against the reaction force of the spring 26. , so as not to impede the rotation of the ratchet cam 17. When the ratchet cam 17 attempts to rotate in the opposite direction, the reversal prevention 25 engages with the teeth to prevent reversal.

Since the rotary disk 8 rotates synchronously with the ratchet cam 17 via the rotary disk shaft 18, it rotates by the angle at which the ratchet cam 17 rotates. The rotary disk 8 rotates in one direction at fixed angle intervals. In this example, it rotates clockwise. The slide bar 15 rotates the turntable 8 by a certain angle so as to transition from the state shown in FIG. 5(c) to the state shown in FIG. 5(d), and then moves to the standby state. This operation is performed by moving the slide bar 15 to the left in the width direction by the action of the air cylinder 20. At this time, the ratchet pin 14 is released against the teeth of the ratchet cam 17 against the reaction force of the spring 26 (see FIG. 7). At this time, since the reversal prevention 25 engages with the teeth of the ratchet cam 17, the ratchet cam 17 does not reverse.

A series of steps from FIG. 5(a) to FIG. 5(d) are performed every time the steel plate material 30 is punched out in the third press section 23. The steps from FIG. 5(d) to FIG. 5(f) are for further rotating the position of the blank hole 3, and the position of the disc recess B changes from the position of the third punch P32 to the position of the third punch P33. Shows the process of moving.

<Effects due to the configuration of punch setting device 7>
According to the configuration of the punch setting device 7 described above, the following effects are achieved. As shown in FIGS. 4 to 7, in the laminated steel plate manufacturing apparatus 1, the punch setting device 7 includes a rotary disk 8, and the third punch P3 at the position corresponding to the disc recess B can be set to a state in which punching is impossible. Therefore, by rotating the turntable 8, it is possible to easily set the position where the blank hole 3 is punched and the position where the blank hole 3 is not punched. Further, since the number of blank holes 3 can be increased or decreased by increasing or decreasing the number of disc recesses B in the rotary disk 8, the number of protrusions 35 can be easily changed.

<Configuration of third punch P3>
Next, the configuration of the third punch P3 in the punch setting device 7 will be explained. As shown in FIGS. 6 and 7, the punch setting device 7 includes a backup pin 10 between the rotary disk 8 and each third punch P3 in the vertical direction. The N third punches P31 to P3N can each independently move up and down. In the example shown in FIGS. 1 to 9, N=8, and the third punch P3 consists of eight punches from third punch P31 to third punch P38. The backup pins 10 are also independently movable up and down in response to the third punch P3. When the upper mold 4 descends and the third punch P3 punches out the steel plate material 30, the third punch P3 directly below the disc recess B rises up until the backup pin 10 comes into contact with the disc recess B, making punching impossible. Become.

As shown in FIGS. 6 and 7, the third punch P3 is vertically movable along the third punch guide hole 37 in the upper mold 4. As shown in FIGS. When the upper die 4 descends, the backup pin 10 is pushed by the lower surface 9 of the disc and descends, pushing down the third punch P3. When the backup pin 10 is located directly below the disc recess B, the backup pin 10 is pushed up into the disc recess B, and the third punch P3 located directly below does not reach the steel plate material 30, making punching impossible. The backup pin 10 and the third punch P3 are in contact with each other in the vertical direction, but are movable independently.

<Effects due to the configuration of the third punch P3>
According to the configuration of the third punch P3 explained above, the following effects are achieved. As shown in FIGS. 6 and 7, the punch setting device 7 includes a backup pin 10 between the rotary disk 8 and each third punch P3 in the vertical direction. Since the rotary disk 8 does not directly contact the third punch P3 when rotating, the third punch P3 can maintain vertical movement accuracy without being subjected to a load in the circumferential direction. Furthermore, since each third punch P3 is independent, for example, when one of the N third punches P3 is damaged, only one damaged third punch P3 needs to be replaced, and all There is no need to replace the third punch P3. Therefore, maintenance costs can be reduced and replacement can be made easily.

<Other configuration examples of the third press section 23>
In addition, in the configuration of the third press section 23 explained above, the punch setting device 7 is provided with the rotary disk 8, and the N third punches P3 are each independently movable up and down, but the following configuration may also be used. good. Although not shown, the rotary disk 8 and the third punch P3 are integrated, and the third punch P3 is formed in advance to be able to punch out (NM) blank holes 3, and can be rotated by 360/N degrees. good. In this case, the third punch P3 is not configured to be movable up and down depending on the position at which the steel plate material 30 is punched, but is configured to lower integrally with the lowering of the upper die 4.

<Configuration of rotation display panel 11>
Next, the rotary display panel 11 will be explained. As shown in FIG. 4, the punch setting device 7 includes a rotating display board 11 that rotates in synchronization with the rotating board 8. The rotary display board 11 can display the position of the disc recess B. Specifically, as shown in FIGS. 4(b) and 6, the belt 34 is driven according to the rotation of the belt pulley 33, and the rotation display board 11 rotates by the phase of rotation of the belt pulley 33. For example, numbers corresponding to the N third punches P3 are attached to the side surface of the rotary display board 11, and the number of the third punch P3 corresponding to the disc recess B of the rotary board 8 appears on a specific side surface. It is composed of

For example, as shown in FIG. 4(b), the rotation display board 11 has an eight-sided configuration corresponding to N=8, and on each side, a number corresponding to the disc recess B in the third punch P3 is displayed on the right side. Is displayed. In this case, there is a disc recess B at the position of the third punch P32, and a display s2 appears on the right side of the rotary display board 11. On each side of the rotary display board 11, the numbers s1 to s8 are arranged clockwise in accordance with the numerical order of the third punch P3.

<Effects due to the configuration of the rotary display panel 11>
According to the configuration of the rotary display panel 11 described above, the following effects are achieved. As shown in FIG. 4, the rotary display board 11 allows the position of the disc recess B to be confirmed in conjunction with the rotation of the rotary disc 8. Therefore, during the successive steps, the position of the disc recess B, which is difficult to visually check inside the third press section 23, can be recognized, so the state of the punch setting device 7 can be checked.

<Description of control device 50>
Next, the control device 50 will be explained with reference to FIG. The laminated steel plate manufacturing apparatus 1 is controlled by a control device 50. In the control device 50, an input device 51 is connected to an input/output interface 60, and an input signal is transmitted to a CPU 61 in addition to information from a ROM 62 and a RAM 63, and performs die drive processing, punch setting device drive processing, transport drive source drive processing, And the mold lifting/lowering driving process is performed. Instructions necessary for the laminated steel plate 36 to be created are input to the input device 51, and various driving processes and controls are performed. In the first die D1, the die drive circuit 52 is controlled by the control device 50, and the die drive device 32 is driven. The first die D1 is rotated by a predetermined angle by the die driving device 32. The steel plate material 30 is transported by the transport device 6 by controlling the transport drive circuit 53 and driving the transport drive source 54 .

The upper mold 4 is raised and lowered by controlling the mold raising/lowering drive circuit 55 and driving the mold raising/lowering drive source 56 . The punch setting drive circuit 57 is controlled by the control device 50, and the punch setting device 7 is driven to move the slide bar 15 of the punch setting device 7. Specifically, the air cylinder 20 of the punch setting device 7 is driven. The amount of movement of the air cylinder 20 is controlled according to the angle at which the rotary disk 8 is rotated.

<Description of the laminated steel plate manufacturing apparatus 1a of the first embodiment>
Next, a laminated steel plate manufacturing apparatus 1a of a first embodiment according to the first aspect of the present invention will be described. Although the overall configuration has already been described, here, the configuration specific to the laminated steel plate manufacturing apparatus 1a will be explained. As shown in FIGS. 1 to 9, the laminated steel sheet manufacturing apparatus 1a is an apparatus that forms a protrusion 35a at one location on the inner peripheral edge of a pressed steel sheet 31a, and manufactures a laminated steel sheet 36a.

In the laminated steel sheet manufacturing apparatus 1a, the first press section 21 rotates the pressed steel sheet 31a clockwise by 45 degrees every time the pressed steel sheet 31a is punched out to perform roll stacking. That is, N=8. Therefore, as shown in FIG. 1 and the like, when rolling, the first die D1 rotates clockwise at 45 degree intervals with N=8. The third punch P3 and the third die D3 are each formed at eight locations at equal intervals on the same radius R1 centering on the rotary disk shaft 18. The third punch P3 consists of eight punches P31, P32, P33, P34, P35, P36, P37, and P38 in accordance with the number N. The numbers of the third punches P3 are sequentially assigned clockwise as the rotary disk 8 rotates clockwise. In the third die D3, D31, D32, D33, D34, D35, D36, D37, and D38 are arranged in a clockwise order corresponding to the position of the third punch P3.

Note that the numbers assigned to the third punch P3 and the third die D3 are for convenience, and may be indicated by alphabets, for example. Note that these numbers may be actually attached near the third punch P3, or may be marked at specific positions. This order corresponds to the numbers displayed on the rotary display board 11, etc. Of course, the number etc. may not actually be attached. In the state shown in FIG. 1A, there is a disc recess B at the position of the third punch P31, indicating that the third punch P31 does not punch out the steel plate material 30. Similarly, FIG. 2(a) shows that there is a disc recess B at the position of the third punch P32, and FIG. 3(a) shows that the disc recess B is located at the position of the third punch P33.

As shown in FIG. 4 and the like, the punch setting device 7 changes the position of the disc recess B while rotating the rotary disc 8a clockwise by 45 degrees, as described above. As shown in Fig. 1(a) etc., the disc recess B is formed in one place, and as shown in Fig. 1(b) etc., the blank holes 3 are formed in (N-M) = 8-1 = 7 places. be done.

The blank hole 3a has a shape that includes the protrusion 35a, and forms a part of the inner peripheral edge of the pressed steel plate 31a. As shown in FIGS. 1 to 2 and further in FIG. 3, the position of the blank hole 3a changes each time the press steel plate 31a is punched, and the portion where the blank hole 3a is not formed and the protrusion 35a is formed is rotated clockwise. It changes so that it rotates 45 degrees.

As shown in FIG. 1A and the like, in the second press section 22a, the second punch P2 has a structure capable of punching out protrusions 35a at N=8 locations on the inner peripheral edge. Since blank holes 3a are formed in seven of these locations in the third press section 23, only one protrusion 35a is punched out in the second press section 22a.

As shown in FIG. 8, a protrusion 35a is formed at one location on the inner peripheral edge of the pressed steel plate 31a. Further, as shown in FIG. 9, the laminated steel plates 36a are formed by rolling pressed steel plates 31a. At this time, the protrusions 35a are stacked one on top of the other in the stacking direction.

<Description of the laminated steel plate manufacturing apparatus 1b of the second embodiment>
Next, a laminated steel plate manufacturing apparatus 1b of a second embodiment according to the first aspect of the present invention will be described. The laminated steel plate manufacturing apparatus 1b differs from the laminated steel plate manufacturing apparatus 1a in the position, shape, and number of protrusions 35b. As shown in FIG. 12, the protrusions 35b of the pressed steel plate 31b are equally formed at three locations on the outer peripheral edge of the pressed steel plate 31b at 120 degree intervals. Moreover, the first die D1 in the first press part 21 rotates by 60 degrees and rolls each time the outer shape of the press steel plate 31b is punched. That is, N=6 and M=3.

As shown in FIGS. 10 and 11, there are six third punches P3 in the third press section 23, from third punch P31 to third punch P36. Six third dies D3, from third die D31 to third die D36, are formed at positions corresponding to the positions of third punch P3. As shown in FIGS. 10(a) and 11(a), the disc recesses B in the rotary disk 8b are arranged at (NM)=6-3=3 locations at equal intervals of 120 degrees on the same radius R2. is formed. As shown in FIGS. 10(b) and 11(b), the blank holes 3 are formed at three locations on the same radius R2 at intervals of 120 degrees.

As shown in FIGS. 10 to 12, the protrusions 35b of the pressed steel plate 31b are formed at three locations on the outer periphery at 120 degree intervals at positions where the blank holes 3b are not formed. Further, as shown in FIG. 13, the laminated steel plates 36b are formed by rolling pressed steel plates 31b. At this time, the protrusions 35b are stacked one on top of the other in the stacking direction.

As shown in FIGS. 10 and 11, a hole inside the protrusion 35b is punched out in the second press section 22b, and a slit hole is punched out in the second press section 22a. In the first press part 21, the protrusion 35b is punched out at the same time as the outer shape. The first press part 21 is configured such that the first punch P1 and the first die D1 can each form protrusions 35b at six locations, and no protrusions 35b are formed at locations corresponding to the blank holes 3b.

Although the laminated steel plate manufacturing apparatus 1a and the laminated steel plate manufacturing apparatus 1b have been described as separate devices, they may be configured as a series of devices. As long as the pressed steel plate 31a has a shape that fits within the inner circumferential circle of the pressed steel plate 31b, a series of devices can be formed. For example, the laminated steel plate manufacturing apparatus 1a is placed on the upstream side in the conveyance direction, and the pressed steel plate 31a is formed using the central portion of the steel plate material 30 in the width direction. The laminated steel plate manufacturing apparatus 1b may be disposed on the downstream side, and the pressed steel plate 31b may be formed by continuously using the steel plate material 30 from which the pressed steel plate 31a has been punched. According to this configuration, the steel plate material 30 has fewer scraps, so material costs can be reduced. Moreover, two types of pressed steel plates 31 and laminated steel plates 36 can be manufactured through a series of steps.

<Explanation of laminated steel sheet manufacturing method>
Next, a method for manufacturing a laminated steel plate according to a second aspect of the present invention will be explained. The laminated steel plate production method is a method of manufacturing a laminated steel plate 36 by punching a band-shaped steel plate material 30, which is intermittently conveyed in the conveyance direction, into an annular pressed steel plate 31 using the laminated steel plate manufacturing apparatus 1 described above. be. Although the operations and effects of each component in the laminated steel plate manufacturing apparatus 1 have already been explained, here, the manufacturing procedure of the laminated steel plate 36 will be explained. Although the explanation will be given using the laminated steel plate manufacturing apparatus 1a as an example, the procedure is similar when using the laminated steel plate manufacturing apparatus 1b.

The laminated steel plate manufacturing method includes a first step of punching (NM) blank holes 3 in the third press section 23 out of the area in the second press section 22 where N protrusions 35 can be formed. . Next, a second step of forming a protrusion 35 on the periphery of the pressed steel plate 31 is provided in the second press section 22 . Next, in the first press section 21, a third step is provided in which the outer shape of the pressed steel plate 31 is punched out and the pressed steel plate 31 is laminated on the already punched pressed steel plate 31.

The first step includes a step of changing the punching position in one direction by 360/N degrees each time the third press section 23 punches out the steel plate material 30. The third step includes punching out the outer shape of the pressed steel plate 31 in the first press section 21, and then rotating the first die D1 and the already laminated pressed steel plates 31 in one direction by 360/N degrees.

Specifically, as shown in FIGS. 1 to 3, as well as FIGS. 10 and 11, in the laminated steel plate manufacturing method, a steel plate material 30 is punched in four stages to form a pressed steel plate 31. In the example shown in FIG. 1 and the like, the second press section 22 punches out the steel plate material 30 using two stages, a second press section 22a and a second press section 22b. First, in the third press section 23, blank holes 3 are punched out in a range that includes (NM) protrusions 35. In the example shown in FIG. 1, N=8 and M=1, so seven blank holes 3 are punched out.

As shown in FIG. 1(a), the second press part 22b punches out a hole shape other than the protrusion 35. The second press section 22a punches out the protrusion 35a on the inner peripheral edge of the pressed steel plate 31a and the inner peripheral portion at the same time. The second punch P2a in the second press part 22a has a shape that can form protrusions 35 at eight locations, which are N locations, evenly in the circumferential direction on the inner peripheral edge of the pressed steel plate 31. When punching out the protrusion 35 in the second step, the second punch P2 punches out the protrusion 35 in an area where there is no blank hole 3. In the region where the blank hole 3 is present, the second punch P2 penetrates through the blank hole 3, so that no protrusion 35 is formed. That is, the second press part 22a can always form the protrusions 35 at N locations regardless of the position where the protrusions 35 are formed, and the position where the protrusions 35 are formed is determined by the position of the blank hole 3.

The third step is a step of punching out the outer shape of the pressed steel plate 31 and rolling it onto the already punched pressed steel plate 31. The first die D1 of the first press section 21 rotates clockwise by an angle of 360/N degrees each time the press steel plate 31 is punched. The position of the protrusion 35 is determined by the position of the blank hole 3 punched in the first step, and when the pressed steel plates 31 are rolled in the third step, the position of the protrusion 35 matches in the upper and lower layers of the stack. The position at which the blank hole 3 is punched is determined by driving and controlling the punch setting device 7 of the third press section 23 described above.

<Effects of laminated steel plate manufacturing method>
According to the laminated steel plate manufacturing method explained above, the following effects are achieved. In the laminated steel plate manufacturing method, in the first step, (NM) blank holes 3 are punched out, and the punching positions are changed in one direction by 360/N degrees. Therefore, the position setting and punching of the blank hole 3 can be performed only by the process in the third press section 23. A pressed steel plate 31 having M protrusions 35 on the periphery is punched out and rolled by rotating it by 360/N degrees in one direction, so that the protrusions 35 can be aligned in the stacking direction.

1, 1a, 1b Laminated steel plate manufacturing device 2 Press section 3, 3a, 3b Blank hole 4 Upper mold 5 Lower mold 6 Conveying device 7 Punch setting device 8, 8a, 8b Rotating disk 9 Lower disk surface 10 Backup pin 11 Rotation Display board 21 First press part 22, 22a, 22b Second press part 23 Third press part 30 Steel plate materials 31, 31a, 31b Press steel plate 35, 35a, 35b Projections 36, 36a, 36b Laminated steel plate B Disc recess C1 First press part center C3 Third press part center D Die D1 First die D2, D2a, D2b Second die D3 Third die P Punch P2 Second punch P3 Third punch R, R1, R2 Radius

Claims (6)

A device that punches and laminates a band-shaped steel plate material, which is intermittently conveyed in the conveyance direction, into an annular pressed steel plate,
an upper mold and a lower mold that are relatively movable in an up-down direction perpendicular to the conveyance direction;
a conveyance device that conveys the steel plate material;
comprising a plurality of press parts for punching the steel plate material,
The press part is equipped with a punch in the upper mold, a die in the lower mold, and can form a protrusion on the periphery of the pressed steel plate,
N is a natural number, M is a natural number smaller than N,
The press part is capable of forming M protrusions of the press steel plate,
The press section includes a first press section capable of punching out the outer shape of the pressed steel plate, a second press section upstream of the first press section in the conveying direction, and a third press section upstream of the second press section. Equipped with a department,
The first die of the first press part is rotatable in one direction by 360/N degrees around the center of the first press part each time the press steel plate is punched,
The second press section includes a second punch and a second die capable of forming the N protrusions along the periphery of the press steel plate,
The third press section is capable of punching blank holes in a range that includes (NM) of the protrusions out of a region in which the N protrusions can be formed in the second press section; The laminated steel plate manufacturing apparatus is capable of changing the punching position of the blank hole by 360/N degrees in the one direction each time the steel plate material is punched. The third press section is
N third punches and N third dies capable of punching out a region in which the protrusion is formed;
When the upper mold is lowered, M of the N third punches include a punch setting device that can set the steel plate material to a state where it cannot be punched;
1 . The punch setting device is rotatable in the one direction by 360/N degrees around the center of the third press section each time the third press section punches the steel plate material. The laminated steel plate manufacturing apparatus described in . The punch setting device includes a rotary disk,
The rotary disk is rotatable around the center of the third press section in the third press section, and M disk recesses are formed on the same radius around the center of the third press section on the lower surface of the disk. formed,
The third punch is arranged on the same radius centered on the center of the third press part,
The third punch located directly below the disc recess is in a state where it cannot punch out the steel plate material,
The (NM) third punches are capable of punching out the steel plate material,
3. The laminated steel plate manufacturing apparatus according to claim 2, wherein the rotary disk is rotatable in the one direction by 360/N degrees each time the third press section punches the steel plate material. The punch setting device includes a backup pin between the rotary disk and each of the third punches in the vertical direction,
When the upper mold is lowered and the third punch punches the steel plate material, the third punch directly below the disc recess is lifted up until the backup pin comes into contact with the disc recess, and punching becomes impossible. The laminated steel plate manufacturing apparatus according to claim 3. comprising a rotation display board that rotates in synchronization with the rotary disc,
4. The laminated steel plate manufacturing apparatus according to claim 3, wherein the rotary display board is capable of displaying the position of the disc recess. A laminated steel plate is manufactured by using the laminated steel plate manufacturing apparatus according to any one of claims 1 to 5, and punching out the band-shaped steel plate material that is intermittently conveyed in the conveyance direction into the annular pressed steel plate. A method,
In the third press part, a first step of punching (NM) blank holes out of a region in the second press part in which the N protrusions can be formed;
a second step of forming the protrusion on the peripheral edge of the pressed steel plate in the second press part;
In the first press section, a third step of punching out the outer shape of the pressed steel plate and laminating it on the already punched pressed steel plate,
The first step includes a step of changing the punching position in the one direction by 360/N degrees each time the third press section punches the steel plate material,
The third step includes punching the outer shape of the pressed steel plate in the first press section, and then rotating the first die and the already laminated pressed steel plates in the one direction by 360/N degrees. Laminated steel plate manufacturing method including.

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