CN111989213A

CN111989213A - Apparatus for manufacturing press-worked product

Info

Publication number: CN111989213A
Application number: CN201980026595.9A
Authority: CN
Inventors: 本田武
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2018-04-20
Filing date: 2019-03-27
Publication date: 2020-11-24
Also published as: WO2019202930A1

Abstract

The invention provides a manufacturing device of a press-processed product, which can improve the positioning precision of a processing position in a die, thereby eliminating the precision error when the die is divided. The press-formed product manufacturing apparatus (1) manufactures a press-formed product (50) by press-forming a strip-shaped steel sheet (100) with a plurality of dies (5a, 5b, 6a, 6 b). The plurality of molds (5a, 5b, 6a, 6b) each have: guide hole forming portions (22, 32) that form guide holes at different positions of the steel plate for each of the plurality of dies; guide pins (23, 33) inserted into guide holes (22, 32) formed in accordance with each of the plurality of dies; and press-working sections (8, 9) that press-work the steel plate (100) positioned by inserting the guide pins (23, 33) into the guide holes (22, 32) into a predetermined shape.

Description

Apparatus for manufacturing press-worked product

Technical Field

The present invention relates to a press working product manufacturing apparatus.

Background

A press die apparatus is known which feeds a strip-shaped steel sheet between dies and performs press working to cut out a product. The die has a plurality of processing areas for performing predetermined press processing on each of the strip-shaped steel sheets sequentially fed. In press working using a die having a plurality of working areas, after aligning a strip-shaped steel plate with each working area using a guide pin of each working area, the strip-shaped steel plate is press-worked into a predetermined shape for each working area.

If the number of machining areas in such a die having a plurality of machining areas is increased, the size of the die is increased in the steel sheet feeding direction, and therefore a large-sized press die apparatus is required. Therefore, for example, patent document 1 (japanese patent application laid-open publication No. 2011-239678) discloses a press mold device in which a machining region is divided into a plurality of molds.

The press die apparatus of patent document 1 includes a main press working apparatus and an auxiliary press working apparatus. The auxiliary press working apparatus forms a second guide hole in a portion which has been disposed of in the past, and performs positioning using the second guide hole, in addition to regularly forming the guide hole in the entire steel sheet. This enables the metal thin plate of the portion to be discarded to be effectively used.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-239678

Disclosure of Invention

Problems to be solved by the invention

However, when the steel sheet is aligned using the guide holes common to the divided dies, it is necessary to adjust the relative positions of the divided dies with higher accuracy.

The invention aims to provide a manufacturing device of a press-processed product, which can improve the positioning precision of press processing in a die and eliminate the precision error when the die is divided.

Means for solving the problems

A first aspect of the present invention is a press-worked product manufacturing apparatus that manufactures a press-worked product by press-working a strip-shaped steel sheet with a plurality of dies, each die having: a guide hole forming portion that forms a guide hole at a different position of the steel plate for each of the plurality of dies; a guide pin inserted into a guide hole formed in accordance with each of the plurality of dies; and a press working portion that press-works the steel plate positioned by the guide pin being inserted into the guide hole into a predetermined shape.

Effects of the invention

With the above configuration, the positioning accuracy of the machining position can be improved in each die, and an accuracy error in die division can be eliminated.

Drawings

Fig. 1 is a perspective view schematically showing a schematic configuration of a press-worked product manufacturing apparatus according to an embodiment.

Fig. 2 is a view schematically showing the mounting structure of the first mold and the second mold mounted to the fixed platen.

Fig. 3 is a perspective view showing a schematic structure of the motor core member.

Fig. 4 is a diagram showing a state of a steel sheet after press working for each working area of a die.

Fig. 5 is a diagram showing the structure of the mold mating surface of the first lower side mold.

Fig. 6 is a diagram showing the structure of the die mating face of the second lower die.

Fig. 7 is a flowchart illustrating a process of manufacturing the core member for a motor using the press-worked product manufacturing apparatus of fig. 1.

Fig. 8 is a diagram showing a configuration of a mold mating surface of a first lower mold according to a modification.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated. The dimensions of the components in the drawings do not faithfully represent actual dimensions of the components, dimensional ratios of the components, and the like.

In the following description, in a state where the press-worked product manufacturing apparatus 1 is installed, the vertical direction of the press-worked product manufacturing apparatus 1 is referred to as the "vertical direction", and the horizontal direction of the press-worked product manufacturing apparatus 1 is referred to as the "horizontal direction". The feeding direction of the strip-shaped steel sheet in the horizontal direction is referred to as "feeding direction", and the direction perpendicular to the feeding direction is referred to as "width direction".

In the following description, the terms "fixed", "connected", and "attached" (hereinafter referred to as "fixed" and the like) mean not only the case where components are directly fixed to each other, but also the case where the components are fixed to each other via other components. That is, in the following description, expressions such as fixing include meanings such as direct and indirect fixing of members to each other.

(Overall Structure)

Fig. 1 is a perspective view showing a schematic configuration of a press-worked product manufacturing apparatus 1 according to an embodiment of the present invention. The press-worked product manufacturing apparatus 1 performs press working on a strip-shaped steel sheet 100 with a die 4, thereby manufacturing a press-worked product.

In the following embodiment, an example will be described in which a strip-shaped steel plate is punched by the press-worked product manufacturing apparatus 1 to process the motor core member 50 as a press-worked product, but the configuration of the present embodiment can be similarly applied to manufacturing of press-worked products used for other applications.

The press-work product manufacturing apparatus 1 performs punching work on a strip-shaped steel plate 100 to form a motor core member 50 as a product portion. Specifically, the press working product manufacturing apparatus 1 includes a lower die 4a and an upper die 4b that are opened and closed relative to each other in the vertical direction. The press-worked product manufacturing apparatus 1 performs punching of the steel plate 100 positioned on the upper surface of the lower die 4a by the upper die 4 b.

The press working product manufacturing apparatus 1 has a fixed platen 2 and a movable platen 3. The movable platen 3 is located above the fixed platen 2 at a predetermined interval in the vertical direction with respect to the fixed platen 2. The movable board 3 can move in the up-down direction so as to be separated and coupled with respect to the fixed board 2.

The lower mold 4a is fixed to the upper surface of the stationary platen 2. The upper die 4b is fixed to the lower surface of the movable platen 3.

The lower die 4a includes a first lower die 5a and a second lower die 6a divided into two in the feeding direction of the steel plate 100. The upper die 4b has a first upper die 5b and a second upper die 6b that are divided into two in the feeding direction of the steel plate 100.

The first lower mold 5a and the second lower mold 6a are fixed to the fixed platen 2 in a state where the relative positions are determined. Specifically, as shown in fig. 2, the stationary platen 2 has a mold mounting surface 2a that fixes the lower mold 4a and extends in the lateral direction. The stationary platen 2 has a plurality of positioning pins 7 on the mold mounting surface 2a for determining the mounting positions of the first lower mold 5a and the second lower mold 6 a.

The positioning pins 7 include four positioning pins 7a arranged in the feeding direction and positioning pins 7b located in the lateral direction with respect to the four positioning pins 7 a.

Three

positioning pins

7a, 7b are arranged in an L-shape on the mold mounting surface 2a when viewed from the up-down direction to determine the position of the first lower mold 5 a. The three

positioning pins

7a and 7b are arranged in an L-shape on the mold mounting surface 2a when viewed in the vertical direction to position the second lower mold 6 a. The fixing positions of the first lower die 5a and the second lower die 6a with respect to the die mounting surface 2a are determined by butting the width-

direction end surfaces

5c, 6c and the feed-

direction end surfaces

5d, 6d against the

positioning pins

7a, 7 b.

Specifically, the widthwise positions of the first lower die 5a and the second lower die 6a with respect to the die mounting surface 2a are determined by abutting the

widthwise end surfaces

5c, 6c of the first lower die 5a and the second lower die 6a against two positioning pins 7a arranged in the feeding direction. Further, the feeding direction positions of the first lower die 5a and the second lower die 6a with respect to the die mounting surface 2a are determined by abutting the width

direction end surfaces

5c, 6c and the feeding

direction end surfaces

5d, 6d of the first lower die 5a and the second lower die 6a with the positioning pins 7a aligned in the feeding direction and the positioning pins 7b positioned in the width direction.

The lower die 4a and the upper die 4b have die-

engaging surfaces

20 and 30, respectively, and the die-

engaging surfaces

20 and 30 have press working

portions

8 and 9 for punching the steel plate 100.

The press working portions of the first lower die 5a, the second lower die 6a, the first upper die 5b, and the second upper die 6b have a plurality of

working areas

21 and 31, respectively. The plurality of

processing areas

21 and 31 are arranged in line in the feeding direction of the first lower die 5a, the second lower die 6a, the first upper die 5b, and the second upper die 6 b.

The

processing regions

21 and 31 of the

press working portions

8 and 9 have

cutting edges

20a and 30a that enable punching processing such as hole forming and outline blanking. Details of the

press working portions

8 and 9 and the working

regions

21 and 31 will be described later.

The lower die 4a and the upper die 4b punch the strip-shaped steel plate aligned with the

respective machining areas

21 and 31 in the

respective machining areas

21 and 31, thereby forming the motor core component 50.

The motor core member 50 is a member for constituting a stator core of a motor not shown. That is, the stator core includes a plurality of motor core members 50 stacked in the thickness direction of the motor core members 50. The structure of the stator core of the motor is the same as that of the conventional stator core, and thus detailed description thereof is omitted.

As shown in fig. 3, the motor core member 50 has a ring shape having a central hole 51 at the center. A plurality of protrusions 56a arranged at a predetermined angle in the circumferential direction are formed on the outer edge 56 of the motor core member 50. The projecting portion 56a is used for circumferential positioning in the lamination process of the motor core member 50.

The motor core member 50 includes an annular yoke 52 and a plurality of teeth 53 extending radially inward from the radially inner side of the yoke 52. The teeth 53 are formed with grooves 55 on both circumferential sides.

Further, the yoke 52 has a plurality of crimping portions 54. The pressure-bonding section 54 is used for fixing the motor core members 50 to each other in a lamination process of the motor core members 50 in manufacturing the stator core.

Fig. 4 is a diagram schematically showing a case where the motor core member 50 is formed from the steel plate 100 by a punching process. Fig. 5 is a diagram showing the structure of the mold mating surface 20 of the first lower die 5 a. Fig. 6 is a diagram showing the structure of the die engagement surface 30 of the second lower die 6 a.

As described above, the die-mating surface 20 of the first lower die 5a and the die-mating surface of the second lower die 6a include the

press working portions

8 and 9, and the

press working portions

8 and 9 include the plurality of

processing regions

21 and 31. The first upper die 5b and the second upper die 6b have die-mating surfaces, not shown. The first lower die 5a and the first upper die 5b, and the second lower die 6a and the second upper die 6b press the steel sheet 100 with the

cutting edges

20a and 30a formed on the die mating surfaces with each other by the

cutting edges

20a and 30 a.

That is, the die-mating surfaces of the first upper die 5b and the second upper die 6b have the same configuration as the die-mating surfaces 20 of the first lower die 5a and the die-mating surfaces 30 of the second lower die 6 a. Hereinafter, in the present embodiment, the configuration of the die engagement surface 20 of the first lower die 5a and the die engagement surface 30 of the second lower die 6a will be mainly described, and the detailed description of the first upper die 5b and the second upper die 6b will be omitted.

When the motor core member 50 is formed from the steel plate 100, a plurality of steps are assigned to the respective working

regions

21, 31 of the

press working sections

8, 9. Each machining area is performed on the steel plate 100.

The steps include, for example, a hole forming step of forming the center hole 51 and the groove 55 of the yoke 52 in the steel plate 100, and an outer shape punching step of forming the outer shape of the motor core component 50 in the steel plate 100. Fig. 4 is a diagram showing a state of the steel sheet 100 after press working for each of the working

regions

21 and 31 of the die 4. The steel plate 100 is press-worked in these plural working regions, thereby forming the motor core component 50 shown in fig. 3.

The sequence of the respective steps shown in fig. 4 is an example, and as long as the motor core member 50 shown in fig. 3 can be formed, the sequence of the respective steps is not determined to be the sequence shown in fig. 4.

As shown in fig. 4 to 6, the die 4 of the present embodiment is a so-called double cavity die in which two rows of

processing areas

21, 31 are located in the

press processing portions

8, 9 in the width direction of the steel sheet 100.

The plurality of

processing regions

21 and 31 are arranged in the

press processing portions

8 and 9 of the first lower die 5a and the second lower die 6a in the feeding direction. As described above, each

machining region

21, 31 has the

cutting edges

20a, 30a on the

die mating surfaces

20, 30. The first lower die 5a and the first upper die 5b, and the second lower die 6a and the second upper die 6b press the steel plate 100 into the shapes of the

cutting edges

20a and 30 a. Therefore, it is necessary to feed the steel sheet 100 to the die 4 in the feeding direction while sequentially aligning the steel sheet 100 with the

processing regions

21 and 31 of the die 4.

As shown in fig. 4, the first guide holes 10 and the second guide holes 15 formed in the steel plate 100 are used for positioning the steel plate 100 with respect to the

processing regions

21 and 31. As a first step, the first lower die 5a forms a first guide hole 10 in the steel plate 100. Therefore, the first lower die 5a has a first guide hole forming portion 22 for forming the first guide hole 10 in the steel plate 100. In addition, as a first step, the second lower die 6a forms the second guide hole 15 in the steel plate 100. Therefore, the second lower die 6a has a second guide hole forming portion 32 for forming the second guide hole 15 in the steel plate 100.

The following describes in detail the structures of the die engagement surface 20 of the first lower die 5a and the die engagement surface 30 of the second lower die 6 a.

(first lower mold)

As described above, the die mating face 20 of the first lower die 5a has the guide hole forming portion 22 for initially forming the first guide hole 10. The die-mating surface 20 of the first lower die 5a has a press working portion 8 on the downstream side in the feeding direction of the first guide hole forming portion 22. The press working portion 8 has a plurality of working regions 21.

As shown in fig. 4 and 5, the first guide hole forming portion 22 forms the first guide hole 10 in the slug portion 101 remaining on the steel plate 100 after the motor core member 50 as a product portion is molded from the steel plate 100. In the present embodiment, the first guide holes 10 are formed at both ends of the steel plate 100 in the width direction.

As described above, the first guide hole 10 formed by the first lower die 5a is formed in the scrap portion 101 of the steel plate. The diameter of the first guide hole 10 is not particularly limited, and is appropriately determined according to the size of the scrap part 101.

As described above, the press-worked portion 8 has a plurality of worked regions 21. The respective machining areas 21 are arranged in two rows in the width direction of the steel sheet 100. The positions of the processing regions 21 arranged in two rows are shifted in the feeding direction. This can improve the yield of the motor core component 50 as a product with respect to the steel sheet 100.

Each of the machining regions 21 is formed by press-working a different part of the motor core member 50. Therefore, each machining region 21 has a cutting edge 20a having a shape corresponding to each pressing step. For example, in the machining region 21a located on the most upstream side in the feeding direction, the outer edge 56 of the motor core member 50 has protrusions 56a arranged at a predetermined angle in the circumferential direction. In the next processing region following the processing region 21a located on the most upstream side, the center hole 51 is formed. The order of arrangement of these processing regions is not particularly limited.

The first lower die 5a has a plurality of first guide pins 23 inserted into the first guide holes 10 of the steel plate 100 so as to align the steel plate 100 with the respective processing areas 21. The first guide pins 23 have a shape protruding upward from the die mating surface 20 of the first lower die 5 a. The first guide pins 23 are located in the vicinity of the processing areas 21.

Thus, the plurality of first guide pins 23 are arranged at equal intervals in the feeding direction of the steel plate 100, similarly to the machining areas 21 arranged at equal intervals in the feeding direction of the steel plate 100. In the present embodiment, the first lower die 5a has at least three first guide pins 23. Thus, the first guide pins 23 for positioning corresponding to the respective processing areas 21 can be inserted into the three or more first guide holes 10 formed in the steel plate 100, and therefore the steel plate 100 can be positioned with higher accuracy with respect to the first dies 5a, 5 b.

(second lower mold)

As described above, the die mating face 30 of the second lower die 6a has the second guide hole forming portion 32 for initially forming the second guide hole 15. The die-mating surface 30 of the second lower die 6a has a press-worked portion 9 on the downstream side in the feeding direction of the second guide hole forming portion 32. The press working portion 9 has a plurality of working regions 31.

As shown in fig. 4 and 6, the second guide hole forming portion 32 forms the second guide hole 15 in the slug portion 101 remaining on the steel plate 100 after the motor core member 50 as a product portion is molded from the steel plate 100. In the present embodiment, the second guide holes 15 are formed at both ends of the steel plate 100 in the width direction at positions different from the first guide holes 10 formed by the first lower die 5 a.

The diameter of the second guide hole 15 formed by the second lower die 6a is the same as the diameter of the first guide hole 10 formed by the first lower die 5 a.

By making the diameters of the first guide hole 10 and the second guide hole 15 formed for each of the plurality of dies the same, it is easy to secure the positions of the first guide hole 10 and the second guide hole 15 on the steel plate 100. Therefore, the yield of the motor core member 50 in the steel plate 100 can be improved.

As described above, the press-worked portion 9 has a plurality of worked regions 31. The respective processing areas 31 are arranged in two rows in the width direction of the steel plate 100, similarly to the first lower die 5 a. The positions of the processing regions 31 arranged in two rows are shifted in the feeding direction. This can improve the yield of the motor core component 50 as a product with respect to the steel sheet 100.

Each of the machining regions 31 is formed by press-working different portions of the motor core member 50. Therefore, each machining region 31 has a cutting edge 30a having a shape corresponding to each pressing step. For example, in the machining area 31a located on the most upstream side in the feeding direction in the left row shown in the figure, a plurality of pressure-bonding sections 54 positioned at the yoke 52 of the core member 50 for the motor are formed. In the next working area 31c following the working area 31a located on the most upstream side, a hole in which a groove 55 of the plurality of teeth 53 is formed.

On the other hand, in the machining region 31b located on the most upstream side in the right row shown in the figure, a hole in which a groove 55 of a plurality of teeth 53 is formed. In the next machining area 31d following the machining area 31b located on the most upstream side, a plurality of pressure-bonding sections 54 positioned at the yoke 52 of the motor core member 50 are formed. In this way, the sequence of press working steps for each of the working regions 31 positioned in two rows in the width direction of the steel sheet 100 may be different.

The holes of the second lower die 6a have a plurality of second guide pins 33 inserted into the second guide holes 15 of the steel plate 100 to align the steel plate 100 with the respective machining areas 31. The second guide pins 33 have a shape protruding upward from the die engagement surface 30 of the second lower die 6 a. The second guide pins 33 are located in the vicinity of the respective processing areas 31.

Thus, the plurality of second guide pins 33 are arranged at equal intervals in the feeding direction of the steel plate 100, similarly to the machining areas 31 arranged at equal intervals in the feeding direction of the steel plate 100. In the present embodiment, the second lower die 6a has thirteen guide pins 33. Thus, the second guide pins 33 for positioning respectively corresponding to the processing areas 31 can be inserted into the three or more second guide holes 15 formed in the steel plate 100, and therefore the steel plate 100 can be positioned with higher accuracy with respect to the second dies 6a, 6 b.

The second lower die 6a further includes a third guide hole forming portion 34 for forming the third guide hole 16 at a position different from the second guide hole 15. The second lower die 6a has a larger proportion of the punched portion of the steel plate 100 on the downstream side thereof. Therefore, the scrap part 101 remaining on the steel sheet 100 is likely to be displaced. The third guide hole 16 can further improve the accuracy of positioning the steel plate 100 in a state where the punched portion is increased.

A third guide pin 35 positioned in the further downstream processing area 31 is inserted into the third guide hole 16 formed by the third guide hole forming portion 34. The second guide pins 35 have a shape protruding upward from the die engagement surface 30 of the second lower die 6a, and are positioned at equal intervals in the feeding direction.

With the above configuration, since the first guide hole 10 and the second guide hole 15 are formed at different positions for each of the plurality of dies, the positioning accuracy of the machining position can be improved in each die, and an accuracy error in die division can be eliminated. Thus, since the steel plate can be press-worked by the plurality of dies 5 and 6, a multi-step press-worked product can be manufactured by a small machine tool.

(Press working Process of iron core Member for Motor)

Next, a press working process for manufacturing the motor core member by the press-worked product manufacturing apparatus 1 of the present embodiment will be described. In the present embodiment, the steel sheet 100 conveyed in sequence is simultaneously and continuously subjected to press working in the plurality of working

areas

21 and 31 included in the lower die 4a and the upper die 4 b. Hereinafter, a process of manufacturing the motor core member by sequentially moving a specific processed portion of the steel sheet 100 in the die 4 will be described.

First, the movable platen 3 is raised to open the lower mold 4a and the upper mold 4b (step S1). This enables the strip-shaped steel sheet 100 to be fed between the lower die 4a and the upper die 4 b. Next, the steel plate 100 in a band shape is passed over the lower die 4a, and a specific portion of the steel plate 100 is positioned at a predetermined position on the upper surface of the first lower die 5a (step S2). The positioning of the steel plate 100 with respect to the first lower die 5a is the same as the positioning of the steel plate in the conventional press-worked product manufacturing apparatus, and therefore, a detailed description thereof is omitted.

Next, the movable platen 3 is lowered to form the first guide hole 10 at a specific portion of the steel plate 100. Thus, the first guide hole 10 is formed by punching at the widthwise end portion of the steel plate 100 by the first guide hole forming portion 22 of the first lower die 5a (step S3). This step is a first pilot hole forming step.

Next, the steel sheet 100 is conveyed, and the steel sheet 100 is aligned with the machining area 21 located on the downstream side in the feeding direction of the first guide hole forming portion 22 (step S4). The amount of feed of the steel sheet 100 at this time is determined by the pitch between the processing regions 21 of the die 4. Next, the first guide pin 23 of the processing area 21 is inserted into the first guide hole 10 formed in the steel plate 100 in the first guide hole forming process (step S5). Thereby, the first lower die 5a is aligned with the steel plate 100.

Next, the movable platen 3 is lowered, and the first lower die 5a and the first upper die 5b perform press working corresponding to the working area (step S6). This step is a first press working step. Thereafter, steps S4 to S6 are repeated according to the number of processing regions 21 included in the first lower die 5a and the first upper die 5 b.

When the press working is performed through the working area 21 of the first lower die 5a and the first upper die 5b by repeating the above steps S4 to S6, the specific portion of the steel sheet 100 is discharged to the outside of the first lower die 5a and the first upper die 5b and is conveyed to the second lower die 6a and the second upper die 6 b.

As described above, the fixed platen 2 determines the mounting positions of the two

molds

5a, 6a by the positioning pins 7, and thus the relative positions between the two

molds

5a, 6a are fixed.

Next, the strip-shaped steel sheet 100 is passed over the lower die 4a, and the specific portion of the steel sheet 100 is positioned at a predetermined position on the upper surface of the second lower die 6a (step S7). The positioning of the steel plate 100 with respect to the second lower die 6a is the same as the positioning of the steel plate in the conventional press-worked product manufacturing apparatus, and therefore, a detailed description thereof is omitted.

Then, the movable disk 3 is lowered to form second guide holes 15 at specific portions of the steel plate 100. Thereby, the second guide hole 15 is formed by punching at the widthwise end portion of the steel plate 100 by the second guide hole forming portion 32 of the second lower die 5b (step S8). This step is a second pilot hole forming step.

Next, the steel sheet 100 is conveyed so that a specific portion of the steel sheet 100 is aligned with the machining area 31 located on the downstream side in the feeding direction of the second guide hole forming portion 32 (step S9). The amount of feed of the steel sheet 100 at this time is determined by the pitch between the processing regions 21 of the die 4. Next, in the second guide hole forming step, the second guide pin 33 of the processed area 31 is inserted into the second guide hole 15 formed in the specific portion of the steel plate 100 (step S10). Thereby, the second lower die 6a is aligned with the steel plate 100.

Next, the movable platen 3 is lowered, and the second lower die 6a and the second upper die 6b perform press working corresponding to the working area (step S11). This step is a second press working step. Thereafter, steps S9 to S11 are repeated in accordance with the number of processing regions 31 arranged in the feeding direction which the second lower die 6a and the second upper die 6b have.

When press working is performed in the working area 31 arranged in the feeding direction of the second lower die 6a and the second upper die 6b, the core component 50 for a motor is manufactured as a product.

With the above configuration, the press-worked product manufacturing apparatus 1 forms the guide holes 10 and 15 at different positions for each of the plurality of dies 5a, 5b, 6a, and 6b, and therefore can improve the positioning accuracy of the working position in each of the dies 5a, 5b, 6a, and 6b, and can eliminate the accuracy error in die division. Thus, the steel plate 100 can be press-worked by the plurality of dies 5a, 5b, 6a, and 6b, and thus a multi-step press-worked product can be manufactured by a small machine tool.

(other embodiments)

The embodiments of the present invention have been described above, but the above embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above embodiment, and can be implemented by appropriately modifying the above embodiment without departing from the scope of the present invention.

In the above embodiment, the first guide hole 10 and the second guide hole 15 are formed at the width direction end portions of the steel plate 100. However, the first guide hole 10 may be formed anywhere as long as it is a portion that is a scrap portion in the processing step after the first guide hole is formed.

For example, as shown in fig. 8, when the steel plate 100 is viewed in plan, the first lower die 65a may form the first guide hole 62 in the portion 61 of the steel plate 100 that is located on the inner side of the outer shape of the press-worked product after press-working by the first lower die 65a and that is the discard portion. That is, the first lower die 65a has a first guide hole forming portion 62 capable of forming a first guide hole in a portion 61 of the steel plate 100 which is a scrap portion.

For example, as the portion 61 which is located inside the outer shape of the press-worked product after press-working by the first lower die 65a and is a slug portion, a portion formed by punching the central hole 51 can be exemplified.

As a result, when the steel sheet 100 is viewed in plan, the guide hole is formed in the scrap part 61 of the steel sheet 100 located inward of the outer shape of the press-worked product, and the yield can be improved as compared with the case where the guide hole 10 is formed outward of the outer shape of the press-worked product 50.

In the above embodiment, the motor core member 50 is described as a press-worked product. However, the press-worked product is not limited to the motor core component, and includes a component produced by press working.

Industrial applicability

The present invention can be applied to a press-worked product manufacturing apparatus that presses a strip-shaped steel sheet with a plurality of dies to manufacture a press-worked product.

Description of the reference symbols

1: a press working product manufacturing device; 2: fixing the disc; 3: a movable disk; 4 a: a lower mold; 4 b: an upper side mold; 5 a: a first lower die; 5 b: a first upper side mold; 5c, 6 c: a widthwise end surface; 5d, 6 d: a feed direction end face; 6 a: a second lower mold; 6 b: a second upper side mold; 7. 7a, 7 b: positioning pins; 8. 9: a press working section; 10: a first guide hole; 15: a second guide hole; 16: a third guide hole; 20. 30: a die mating surface; 20a, 30 a: a knife tip; 21. 31: a machining area; 22: a first guide hole forming part; 23: a first guide pin; 32: a second guide hole forming part; 33: a second guide pin; 34: a third guide hole forming part; 35: a third guide pin; 50: an iron core member for a motor; 51: a central bore; 52: a yoke portion; 53: teeth; 54: a crimping part; 55: a groove; 56: an outer edge; 100: a steel plate; 101: and a waste part.

Claims

1. A press-worked product manufacturing apparatus for manufacturing a press-worked product by press-working a strip-shaped steel plate with a plurality of dies, respectively,

The plurality of molds each have:

a guide hole forming portion that forms a guide hole at a different position of the steel plate for each of the plurality of dies;

a guide pin inserted into a guide hole formed in accordance with each of the plurality of dies; and

and a press working portion that press-works the steel plate positioned by the guide pin being inserted into the guide hole into a predetermined shape.

2. The press-worked product manufacturing apparatus according to claim 1,

the guide hole forming portion forms the guide hole in a portion of the steel plate that is a scrap portion located inward of an outer shape of the press-worked product after press-working by the plurality of dies in a plan view of the steel plate.

3. The press-worked product manufacturing apparatus according to claim 1 or 2,

the guide hole forming portions of the plurality of dies form guide holes having the same diameter at different positions of the steel plate.

4. The press-worked product manufacturing apparatus according to any one of claims 1 to 3,

the press working section has three or more press working regions for press working the steel sheet,

The guide pins include positioning guide pins corresponding to the three or more processing areas,

the press working region press-works the steel plate positioned by the positioning guide pin being inserted into the guide hole.

5. A method of manufacturing a press-worked product by press-working a strip-shaped steel plate with a plurality of dies, respectively, wherein,

the manufacturing method of the stamping product comprises the following steps:

a first guide hole forming step of forming a first guide hole by a first die of the plurality of dies;

a first press working step of press working the steel sheet into a predetermined shape with reference to a first guide hole by the first die;

a second guide hole forming step of forming a second guide hole at a position different from the first guide hole by a second die press-forming the steel plate after the first die, out of the plurality of dies; and

and a second press working step of performing press working with the second guide hole as a reference by the second die.

6. The press-worked product manufacturing method according to claim 5,

In the first guide hole forming step, when the steel plate is viewed in plan, a first guide hole is formed in a portion of the steel plate which is located inside the outer shape of the press-worked product in the second press working step and is a slug portion.

7. The press-worked product manufacturing method according to claim 5 or 6,

in the first and second guide hole forming steps, guide holes having the same diameter are formed at different positions of the steel plate.

8. The press-worked product manufacturing method according to any one of claims 5 to 7,

the first press working step using the first die is performed using three or more press working regions in which the steel sheet is press-worked, and the press working is performed with the first guide hole as a reference for each of the three or more press working regions.

9. The press-worked product manufacturing method according to any one of claims 5 to 8,

the second press working step using the second die is performed using three or more press working regions in which the steel sheet is press-worked, and the press working is performed with the second guide hole as a reference for each of the working regions.