US20090158808A1 - Method for Manufacturing Ring-Shaped Member - Google Patents
Method for Manufacturing Ring-Shaped Member Download PDFInfo
- Publication number
- US20090158808A1 US20090158808A1 US12/083,232 US8323206A US2009158808A1 US 20090158808 A1 US20090158808 A1 US 20090158808A1 US 8323206 A US8323206 A US 8323206A US 2009158808 A1 US2009158808 A1 US 2009158808A1
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- United States
- Prior art keywords
- shaped member
- ring
- blank
- longitudinal
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title description 5
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 description 22
- 238000000465 moulding Methods 0.000 description 18
- 238000003825 pressing Methods 0.000 description 17
- 230000001105 regulatory effect Effects 0.000 description 10
- 230000000994 depressogenic effect Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/06—Making more than one part out of the same blank; Scrapless working
Definitions
- the present invention relates to a method of manufacturing a ring-shaped member.
- a ring-shaped member 1 as shown in FIG. 12 has been conventionally manufactured through a method of punching out a plurality of annular ring-shaped members 1 by one column or a plurality of columns by a pressing device from a raw material 2 having a predetermined plate thickness as shown in FIGS. 13( a ) and 13 ( b ).
- the yield rate or the percentage of the weight of the ring-shaped member 1 with respect to the weight of the raw material 2 is bad, and tends to increase the cost of the ring-shaped member 1 .
- the “Skeleton” is a frame shaped scrap that remains after punching out a plurality of ring-shaped members 1
- the “slug” is a plurality of scraps punched out and removed with a punch when punching out the plurality of ring-shaped members 1 .
- the present invention in view of solving the above problems, aims to provide a method of manufacturing a ring-shaped member that improves the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material, and capable of cost reduction.
- a plurality of longitudinal annular blanks are punched out from a raw material of a predetermined width, and the longitudinal annular blank is molded into an annular ring-shaped member.
- material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shaped member is suppressed low compared to the case shown in FIG. 13 , and thus the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be improved.
- the method of manufacturing the ring-shaped member according to the present invention enables material to be removed so that both end edges in the width direction of the blank lie along both ends in the width direction of the raw material when punching out the blank from the raw material.
- the blank includes linear parts facing each other at both sides in the width direction and a pair of curved parts for continuing both ends in the longitudinal direction of the linear parts, the outer end edges of the linear parts of the blank can be formed by both end edges in the width direction of the raw material.
- the material can be removed such that the percentage of the scrap with respect to the longitudinal annular blank is suppressed to a minimum, and in consequence, the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be further improved.
- material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shaped member is suppressed low, and thus the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be improved, and the cost of the ring-shaped member can be reduced.
- FIG. 1 is a plan view showing a first embodiment of a step of punching out blanks from a raw material.
- FIG. 2 is an enlarged front view showing the blank punched out from the raw material of FIG. 1 .
- FIG. 3 is a plan view showing an embodiment of a state in which the blank is set in a first shaping device.
- FIG. 4 is a plan view showing an embodiment of a state in which the deformed blank is molded by the first shaping device.
- FIG. 5 is a plan view showing an embodiment of a state in which the deformed blank is set in a second shaping device.
- FIG. 6 is a plan view showing an embodiment of a state in which a half-finished article is molded by the second shaping device.
- FIG. 7 is a plan view showing an embodiment of a state in which the half-finished article is set in a third shaping device.
- FIG. 8 is a plan view showing an embodiment of a state in which the right half portion of the half-finished article is molded into a semicircle by the third shaping device.
- FIG. 9 is a plan view showing an embodiment of a state in which the half-finished article is molded into a ring-shaped member by the third shaping device.
- FIG. 10 is an enlarged front view showing a second embodiment of a blank.
- FIG. 11 is a plan view showing another embodiment of a step of punching out the blank from the raw material.
- FIG. 12 is a front view showing one example of the ring-shaped member.
- FIG. 13 is a plan view showing the conventional steps of punching out the blank from the material, where 13 ( a ) shows punching out one column, 13 ( b ) shows punching out in parallel.
- a plurality of longitudinal annular blanks 3 is punched out in series at a predetermined spacing 1 in the feeding direction by the pressing device while feeding the raw material 2 of a predetermined width and plate thickness in the longitudinal direction of the raw material 2 as shown by an arrow X.
- the raw material 2 used may be that formed into a plate shaped body by rolling the metal rod material such as copper, aluminum, iron, stainless steel and the like, or that formed as a plate shaped body from the beginning.
- the longitudinal annular blank 3 includes linear parts 3 b , 3 c on the left and right sides facing each other with a longitudinal hole 3 a having a small width dimension w 1 on the inner side, and a pair of curved parts 3 d continuing both ends in the longitudinal direction of the linear parts 3 b , 3 c , as shown in FIG. 2 , and the longitudinal annular blank 3 is set in a first shaping device 4 , as shown in FIG. 3 .
- the first shaping device 4 includes a moving plate 5 and a pair of front and back guide plates 6 , where the moving plate 5 is guided by the guide plates 6 to move forward and backward in the left and right direction (direction of arrow X 1 , X 2 ) by a forward/backward movement mechanism (not shown).
- the moving plate 5 includes a main body part 5 a , and collar parts 5 b , 5 b formed on both ends in the front and back direction of the main body part 5 a , where the collar parts 5 b , 5 b slidably go under the lower side of the edges 6 a , 6 a at the side facing the opponent in the guide plate 6 , and a vertical step difference surface 5 c formed at the boundary of the main body part 5 a and the collar parts 5 b , 5 b is arranged so as to slidably contact the end surface 6 b at the side facing the opponent in the guide plate 6 .
- An inner die 8 - 1 having a boat shape in a projected plane is projected upward at the central part of the main body part 5 a in the moving plate 5 on the line Y orthogonal to line X.
- the width dimension w 2 of the inner die 8 - 1 is set to a size slightly smaller than the width dimension w 1 of the longitudinal hole 3 a so as to fit into the longitudinal hole 3 a of the blank 3 .
- a pair of front and back positioning projections 8 - 2 , and two pairs of front and back positioning/deformation tolerating projections 9 are arranged on the guide plate 6 in the first shaping device 4 .
- the pair of positioning projections 8 - 2 is provided to prevent the longitudinal annular blank 3 from moving in the direction of the arrow Y 1 , Y 2 and to position the longitudinal annular blank 3 at an appropriate position when the longitudinal annular blank 3 is set in the first shaping device 4 , and furthermore, is arranged at symmetrical positions with the line X in between so as to face each other on the line Y orthogonal to the line X, where the distance in between is set to a value slightly larger than the dimension in the longitudinal direction of the longitudinal annular blank 3 to enable the setting of the longitudinal annular blank 3 .
- the two pairs of front and back positioning/deformation tolerating projections 9 are provided to prevent the longitudinal annular blank 3 from moving in the direction of the arrows X 1 , X 2 and to position the longitudinal annular blank 3 at an appropriate position as well as to tolerate the deformation of the longitudinal annular blank 3 by an inner die 8 - 1 when the longitudinal annular blank 3 is set in the first shaping device 4 , and is further arranged at symmetrical positions with the line X and the line Y passing through the center of the moving plate 5 in between, where the distance in between in the direction of the line X is set at a value slightly larger than the dimension in the width direction of the longitudinal annular blank 3 to enable the setting of the longitudinal annular blank 3 .
- Each positioning/deformation tolerating projection 9 has a circular arc shaped deformation tolerating surface 9 b formed in continuation to the positioning surface 9 a that is parallel to the line Y.
- an upper die 10 shown by a double-chain dashed line is lowered from above.
- the upper surfaces of the guide plate 6 , the positioning projection 8 - 2 , and the positioning/deformation tolerating projection 9 are thereby pressed by the lower surface of the upper die 10 , and the upper surfaces of the blank 3 and the inner die 8 - 1 face the lower surface of the upper die 10 by way of an extremely small gap (small gap allowing slide movement) thereby preventing a warp of the blank 3 .
- the moving plate 5 is moved in the direction of the arrow X 2 in this state.
- the inner die 8 - 1 presses and energizes the linear part 3 c on the right side of the longitudinal annular blank 3 in the direction of the arrow X 2 from the inner side to bend in the direction of the arrow X 2 as shown in FIG. 4 , and subsequently, the moving plate 5 is moved in the direction of the arrow X 1 so that the inner die 8 - 1 presses and energizes the linear part 3 b on the left side (see FIG. 3 ) of the longitudinal annular blank 3 in the direction of the arrow X 1 from the inner side to bend in the direction of the arrow X 1 as shown in FIG.
- the deformed longitudinal annular blank 3 A shown in FIG. 4 is set in a second shaping device 11 shown in FIG. 5 .
- the second shaping device 11 includes a pair of left and right molding outer dies 12 , and a pair of front and back regulating dies 13 , where the molding outer die 12 is guided by a guide groove 14 and is moved forward and backward in the left and right direction (direction of arrows X 1 , X 2 ) on the base 15 by a forward/backward movement mechanism (not shown).
- the molding outer die 12 includes a mounting surface 12 a and a pressing surface 12 b projecting vertically upward from the mounting surface 12 a and having the projected plane depressed into a circular arc shape, where the curvature radius of the pressing surface 12 b is set to a value larger than the curvature radius of the outer peripheral surface of the curved part 3 d in the deformed longitudinal annular blank 3 A.
- the regulating die 13 is formed at the end face on the side facing the opponent with a regulating surface 13 a having the projected plane depressed into a circular arc shape.
- a holding inner die 16 projecting upward from the upper surface at the central part of the base 15 and having a boat shape in projected plane view is arranged extending in the direction of the line X, where the width dimension of the holding inner die 16 is set to a dimension slightly smaller than the width dimension of the longitudinal hole 3 e so as to be fitted to the longitudinal hole 3 e of the deformed longitudinal annular blank 3 A.
- a circular arc shaped holding surface 16 a is arranged vertically at both ends on the line X of the holding inner die 16 , and a cut-out part 16 b is formed on the lower side of the holding surface 16 a and the vicinity thereof.
- an upper die 17 shown by a double chain-dashed line is lowered from above.
- the upper surfaces of the regulating die 13 and the holding inner die 16 are pressed by the lower surface of the upper die 17 , and the upper surfaces of the longitudinal annular blank 3 A and the molding outer die 12 face the lower surface of the upper die 17 by way of an extremely small gap (small gap allowing slide movement) thereby preventing the warp of the blank 3 A.
- the molding outer dies 12 are moved in the direction of the arrows X 1 , X 2 in this state.
- the pressing surface 12 b of the molding outer die 12 thereby presses and energizes the outer side of the curved part 3 d of the deformed longitudinal annular blank 3 A towards the curved part 3 d on the opponent side.
- the mounting surface 12 a of the molding outer die 12 enters the cut-out part 16 b of the holding inner die 16 . Therefore, as shown in FIG.
- both curved parts 3 d are deformed along the pressing surface 12 b when the radial outer surface of large curvature radius is pressed inward from the outer side by the pressing surface 12 b depressed into a circular arc shape of the molding outer die 12 in a state wherein the radial inner surface is slightly pressed and widened by the circular arc shaped holding surface 16 a of the holding inner die 16 and positioned with the movement in the directions of the arrows X 1 , X 2 regulated, and thus “extension” is generated in the radial outer region having large curvature radius and “extension” in the radial inner region having small curvature radius in the curved part 3 d are suppressed as much as possible, thickness of the radial inner region is avoided from being thinned, and furthermore, flow of material that thickens the curved part 3 d is generated so as to alleviate stress concentration at the radial inner region.
- both curved parts 3 d can be molded into a large curved part 3 D having a large curvature radius advantageous in manufacturing the ring-shaped member 1 without generating cracks at the curved part 3 d , and thus the yield rate or the percentage of the ring-shaped member 1 with respect to the longitudinal annular blank 3 A can be improved.
- the half-finished article 18 shown in FIG. 6 is further set in a third shaping device 19 shown in FIG. 7 in the next step.
- the third shaping device 19 includes a base 20 , and an upper plate 21 for blocking the upper surface of the base 20 by way of a spacing in the height direction, where a guide groove 22 is formed in the base 20 on the line X passing through the center, and a moving plate 23 that freely moves forward and backward in the direction of the arrows X 1 , X 2 is fitted into the guide groove 22 .
- the moving plate 23 moves forward and backward in the direction of the arrows X 1 , X 2 by a forward/backward moving mechanism (not shown).
- the upper surface of the moving plate 23 is in plane with the upper surface of the base 20 , and a finishing inner die 24 having an elliptical shape in a projected plane view is arranged at the central part so as to project upward on a line Y passing through the center of the base 20 and being orthogonal to the line X.
- the finishing inner die 24 faces a window part 25 of a substantially perfect circle formed on the upper plate 21 , and the inner peripheral surface of the window part 25 functions as an outer die.
- an upper die 26 shown with a double chain-dashed line is lowered from above.
- the upper surface of the upper plate 21 is thereby pressed by the lower surface of the upper die 26 , and the upper surfaces of the half-finished article 18 and the finishing inner die 24 face the lower surface of the upper die 26 by way of an extremely small gap (small gap allowing slide movement) thereby preventing the warp of the half-finished article 18 .
- the moving plate 23 is moved in the direction of the arrow X 2 in such state.
- the finishing inner die 24 presses and energizes the right half portion of the half-finished article 18 in the direction of the arrow X 2 from the inner side and presses the outer peripheral surface of the right half portion against the inner peripheral surface of the right half portion in the window part 25 of a substantially perfect circle, as shown in FIG. 8 , thereby molding the right half portion of the half-finished article 18 into a semicircle.
- the moving plate 23 is moved in the direction of the arrow X 1 .
- the finishing inner die 24 thereby presses and energizes the left half portion of the half-finished article 18 in the direction of the arrow X 1 from the inner side and presses the outer peripheral surface of the left half portion against the inner peripheral surface of the left half portion in the window part 25 of a substantially perfect circle as shown in FIG. 9 , thereby molding the left half portion of the half-finished article 18 into a semicircle to manufacture a ring-shaped member 1 shown in FIG. 9 and FIG. 12 .
- the ring-shaped member 1 shown in FIG. 9 and FIG. 12 is manufactured by punching out a plurality of longitudinal annular blanks 3 from a raw material 2 shown in FIG. 1 , and pressing and widening the longitudinal annular blanks 3 to be molded into an annular shape by first to third shaping devices 4 , 11 , 19 . Therefore, the yield rate or the percentage of the weight of the ring-shaped member 1 with respect to the weight of the raw material 2 can be improved, and the cost of the ring-shaped member 1 can be reduced by removing the material such that the percentage of the skeleton S 1 and the slug S 2 of FIG. 1 with respect to the ring-shaped member 1 is suppressed lower than the percentage of the skeleton S 1 and the slug S 2 with respect to the ring-shaped member 1 described in FIG. 13 .
- each curved part 3 d is deformed along the pressing surface 12 b when the radial outer surface of large curvature radius is pressed inward from the outer side by the pressing surface 12 b depressed into a circular arc shape of the molding outer die 12 in a state wherein the radial inner surface is slightly pressed and widened by the circular arc shaped holding surface 16 a of the holding inner die 16 and positioned with the movement in the directions of the arrows X 1 , X 2 regulated by pressing and energizing the outer side of the pair of curved parts 3 d of the deformed longitudinal annular blank 3 A towards the curved part 3 d on the opponent side by the pressing surface 12 b depressed to a circular arc shape of the molding outer die 12 by the second shaping device 11 , and thus “extension” in the radial outer region having large curvature radius is suppressed as much as possible, the thickness of the radial inner region is avoided from being thinned, and furthermore, flow of material that thickens
- both curved parts 3 d can be molded into a large curved part 3 D having a large curvature radius and advantageous in manufacturing the ring-shaped member 1 without generating cracks at the curved part 3 d , and thus the yield rate or the percentage of the ring-shaped member 1 with respect to the longitudinal annular blank 3 A can be improved and the cost of the ring-shaped member 1 can be reduced.
- the longitudinal annular blank 3 having a small width dimension w 1 of the longitudinal hole 3 a is punched out, and such blank 3 is pressed and widened to manufacture the ring-shaped member 1 , as shown in FIG. 2 , but, as shown in FIG. 10 , a longitudinal annular blank 27 having a longitudinal hole 27 a of oval shape in which the width dimension w 3 is sufficiently larger than the width dimension w 1 of FIG. 2 may be punched out, and such blank 27 may be pressed and widened through the same procedures as the above embodiment to be molded into the ring-shaped member 1 .
- the yield rate or the percentage of the ring-shaped member 1 with respect to the longitudinal annular blank 27 can be improved and the cost of the ring-shaped member 1 can be reduced, similar to the above embodiment.
- the material can be removed such that the percentage of the scrap with respect to the longitudinal annular blank 3 , 27 is suppressed to a minimum.
- the scraps are reduced to the slug S 1 punched out and removed by punch in time of punching out the longitudinal hole 3 a , 27 a , and an end plate part 2 x of drum shape existing between the longitudinal annular blanks 3 or blanks 27 arrayed in the longitudinal direction and to be separated away from the raw material 2 , as shown by slashed lines in FIGS. 11( a ) and 11 ( b ).
- the yield rate or the percentage of the weight of the ring-shaped member 1 with respect to the weight of the raw material 2 can be further improved.
- the method of manufacturing the ring-shaped member of the present invention also has the following features.
- the longitudinal annular blank 3 is molded into an annular shape by pressing the curved part 3 d at both ends in the longitudinal direction towards the opponent side from the outer side.
- the material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shaped member 1 is suppressed low, and the yield rate or the percentage of the weight of the ring-shaped member 1 with respect to the weight of the raw material can be improved.
- the curved parts 3 d at both ends in the longitudinal direction are pressed towards the opponent side from the outer side, the “extension” of the radial inner region having a small curvature radius at the curved part 3 d can be suppressed as much as possible, thinning of the radial inner region is avoided, and furthermore, the flow of material that thickens the curved part 3 d is generated and alleviates the stress concentration of the radial inner region. As a result, cracks are not generated at the curved part 3 d , and the yield rate or the percentage of the ring-shaped member 1 with respect to the longitudinal annular blank 3 can be improved.
- the longitudinal annular blank 3 is desirably molded into an annular shape by shaping devices 11 , 19 including an inner die 16 , 24 and an outer die 12 , 25 .
- the ring-shaped member 1 of high quality is thereby efficiently manufactured and cost can be reduced.
- the longitudinal annular blank 3 includes linear parts 3 b , 3 c facing each other at both sides in the width direction with the longitudinal hole 3 a on the inner side, and curved parts 3 d for continuing both ends in the longitudinal direction of the linear parts 3 b , 3 c , where the dimension in the width direction of the longitudinal annular blank 3 is widened by pressing and energizing the linear parts 3 b , 3 c by the inner die 8 - 1 fitted in the longitudinal hole 3 a , and thereafter, the outer side of the curved parts 3 d is pressed and energized towards the curved part 3 d on the opponent side with the molding outer die 12 with the holding inner die 16 fitted into the longitudinal hole 3 a which dimension in the width direction is widened, thereby pressing and widening the curved parts 3 d to large curved parts 3 D having a large curvature radius.
- the curved parts 3 d are pressed inward from the outer side by the molding outer die 12 while being positioned with the movement towards the curved part 3 d on the opponent side regulated by the holding inner die 16 , whereby “extension” of the radial inner region having a small curvature radius in the curved part 3 d is suppressed as much as possible, thinning of the radial inner region is avoided, and stress does not concentrate at the radial inner region, so that both curved parts 3 d are readily molded into the large curved parts 3 D having a large curvature radius without generating cracks at the curved parts 3 d.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
The yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material is improved to achieve the cost reduction of the ring-shaped member. A plurality of longitudinal annular blanks 3 is punched out from a raw material 2 of a predetermined width, and the longitudinal annular blank 3 is molded into an annular ring-shaped member 1.
Description
- The present invention relates to a method of manufacturing a ring-shaped member.
- A ring-
shaped member 1 as shown inFIG. 12 has been conventionally manufactured through a method of punching out a plurality of annular ring-shaped members 1 by one column or a plurality of columns by a pressing device from araw material 2 having a predetermined plate thickness as shown inFIGS. 13( a) and 13(b). - However, in the conventional manufacturing method, the yield rate or the percentage of the weight of the ring-
shaped member 1 with respect to the weight of theraw material 2 is bad, and tends to increase the cost of the ring-shaped member 1. - This is because the material is removed at high percentage of skeleton S1 and slug S2 with respect to the ring-
shaped member 1. The “Skeleton” is a frame shaped scrap that remains after punching out a plurality of ring-shaped members 1, and the “slug” is a plurality of scraps punched out and removed with a punch when punching out the plurality of ring-shaped members 1. - The present invention, in view of solving the above problems, aims to provide a method of manufacturing a ring-shaped member that improves the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material, and capable of cost reduction.
- In the method of manufacturing a ring-shaped member according to the present invention, a plurality of longitudinal annular blanks are punched out from a raw material of a predetermined width, and the longitudinal annular blank is molded into an annular ring-shaped member.
- According to such configuration, material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shaped member is suppressed low compared to the case shown in
FIG. 13 , and thus the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be improved. - In one suitable aspect, the method of manufacturing the ring-shaped member according to the present invention enables material to be removed so that both end edges in the width direction of the blank lie along both ends in the width direction of the raw material when punching out the blank from the raw material. In such case, the blank includes linear parts facing each other at both sides in the width direction and a pair of curved parts for continuing both ends in the longitudinal direction of the linear parts, the outer end edges of the linear parts of the blank can be formed by both end edges in the width direction of the raw material. Accordingly, the material can be removed such that the percentage of the scrap with respect to the longitudinal annular blank is suppressed to a minimum, and in consequence, the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be further improved.
- According to the present invention, material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shaped member is suppressed low, and thus the yield rate or the percentage of the weight of the ring-shaped member with respect to the weight of the raw material can be improved, and the cost of the ring-shaped member can be reduced.
-
FIG. 1 is a plan view showing a first embodiment of a step of punching out blanks from a raw material. -
FIG. 2 is an enlarged front view showing the blank punched out from the raw material ofFIG. 1 . -
FIG. 3 is a plan view showing an embodiment of a state in which the blank is set in a first shaping device. -
FIG. 4 is a plan view showing an embodiment of a state in which the deformed blank is molded by the first shaping device. -
FIG. 5 is a plan view showing an embodiment of a state in which the deformed blank is set in a second shaping device. -
FIG. 6 is a plan view showing an embodiment of a state in which a half-finished article is molded by the second shaping device. -
FIG. 7 is a plan view showing an embodiment of a state in which the half-finished article is set in a third shaping device. -
FIG. 8 is a plan view showing an embodiment of a state in which the right half portion of the half-finished article is molded into a semicircle by the third shaping device. -
FIG. 9 is a plan view showing an embodiment of a state in which the half-finished article is molded into a ring-shaped member by the third shaping device. -
FIG. 10 is an enlarged front view showing a second embodiment of a blank. -
FIG. 11 is a plan view showing another embodiment of a step of punching out the blank from the raw material. -
FIG. 12 is a front view showing one example of the ring-shaped member. -
FIG. 13 is a plan view showing the conventional steps of punching out the blank from the material, where 13(a) shows punching out one column, 13(b) shows punching out in parallel. -
- 1 ring-shaped member
- 2 raw material
- 2 a ends in width direction of raw material
- 3 longitudinal annular blank
- A preferred embodiment of the method of manufacturing the ring-shaped member according to the present invention will now be described based on the drawings.
- As shown in
FIG. 1 , a plurality of longitudinalannular blanks 3 is punched out in series at apredetermined spacing 1 in the feeding direction by the pressing device while feeding theraw material 2 of a predetermined width and plate thickness in the longitudinal direction of theraw material 2 as shown by an arrow X. Theraw material 2 used may be that formed into a plate shaped body by rolling the metal rod material such as copper, aluminum, iron, stainless steel and the like, or that formed as a plate shaped body from the beginning. - The longitudinal
annular blank 3 includeslinear parts longitudinal hole 3 a having a small width dimension w1 on the inner side, and a pair ofcurved parts 3 d continuing both ends in the longitudinal direction of thelinear parts FIG. 2 , and the longitudinalannular blank 3 is set in afirst shaping device 4, as shown inFIG. 3 . - The
first shaping device 4 includes a movingplate 5 and a pair of front andback guide plates 6, where the movingplate 5 is guided by theguide plates 6 to move forward and backward in the left and right direction (direction of arrow X1, X2) by a forward/backward movement mechanism (not shown). The movingplate 5 includes amain body part 5 a, andcollar parts main body part 5 a, where thecollar parts edges guide plate 6, and a verticalstep difference surface 5 c formed at the boundary of themain body part 5 a and thecollar parts end surface 6 b at the side facing the opponent in theguide plate 6. An inner die 8-1 having a boat shape in a projected plane is projected upward at the central part of themain body part 5 a in themoving plate 5 on the line Y orthogonal to line X. The width dimension w2 of the inner die 8-1 is set to a size slightly smaller than the width dimension w1 of thelongitudinal hole 3 a so as to fit into thelongitudinal hole 3 a of the blank 3. - A pair of front and back positioning projections 8-2, and two pairs of front and back positioning/
deformation tolerating projections 9 are arranged on theguide plate 6 in thefirst shaping device 4. As mentioned below, the pair of positioning projections 8-2 is provided to prevent the longitudinalannular blank 3 from moving in the direction of the arrow Y1, Y2 and to position the longitudinalannular blank 3 at an appropriate position when the longitudinalannular blank 3 is set in thefirst shaping device 4, and furthermore, is arranged at symmetrical positions with the line X in between so as to face each other on the line Y orthogonal to the line X, where the distance in between is set to a value slightly larger than the dimension in the longitudinal direction of the longitudinalannular blank 3 to enable the setting of the longitudinalannular blank 3. - As mentioned below, the two pairs of front and back positioning/
deformation tolerating projections 9 are provided to prevent the longitudinalannular blank 3 from moving in the direction of the arrows X1, X2 and to position the longitudinalannular blank 3 at an appropriate position as well as to tolerate the deformation of the longitudinalannular blank 3 by an inner die 8-1 when the longitudinalannular blank 3 is set in thefirst shaping device 4, and is further arranged at symmetrical positions with the line X and the line Y passing through the center of themoving plate 5 in between, where the distance in between in the direction of the line X is set at a value slightly larger than the dimension in the width direction of the longitudinalannular blank 3 to enable the setting of the longitudinalannular blank 3. Each positioning/deformation tolerating projection 9 has a circular arc shapeddeformation tolerating surface 9 b formed in continuation to thepositioning surface 9 a that is parallel to the line Y. - As shown in
FIG. 3 , when the longitudinalannular blank 3 is set in thefirst shaping device 4, anupper die 10 shown by a double-chain dashed line is lowered from above. The upper surfaces of theguide plate 6, the positioning projection 8-2, and the positioning/deformation tolerating projection 9 are thereby pressed by the lower surface of theupper die 10, and the upper surfaces of the blank 3 and the inner die 8-1 face the lower surface of theupper die 10 by way of an extremely small gap (small gap allowing slide movement) thereby preventing a warp of the blank 3. - The
moving plate 5 is moved in the direction of the arrow X2 in this state. The inner die 8-1 presses and energizes thelinear part 3 c on the right side of the longitudinal annular blank 3 in the direction of the arrow X2 from the inner side to bend in the direction of the arrow X2 as shown inFIG. 4 , and subsequently, themoving plate 5 is moved in the direction of the arrow X1 so that the inner die 8-1 presses and energizes thelinear part 3 b on the left side (seeFIG. 3 ) of the longitudinalannular blank 3 in the direction of the arrow X1 from the inner side to bend in the direction of the arrow X1 as shown inFIG. 4 , where a longitudinalannular blank 3A in which the dimension in the width direction is widened and deformed from the dimension in the width direction ofFIG. 3 is molded. In the process of molding, the widening deformation of thelinear parts annular blank 3 shown inFIG. 3 is tolerated since the outer surface in the width direction of the region near thecurved part 3 d of thelinear parts deformation tolerating surface 9 b of each of the two pairs of positioning/deformation tolerating projection 9, and the thinning of the widened and deformed part in time of widening deformation can be suppressed since thedeformation tolerating surface 9 b is formed into a circular arc shape. - In the next step, the deformed longitudinal
annular blank 3A shown inFIG. 4 is set in asecond shaping device 11 shown inFIG. 5 . - The
second shaping device 11 includes a pair of left and right moldingouter dies 12, and a pair of front and back regulatingdies 13, where the moldingouter die 12 is guided by aguide groove 14 and is moved forward and backward in the left and right direction (direction of arrows X1, X2) on thebase 15 by a forward/backward movement mechanism (not shown). - The molding
outer die 12 includes amounting surface 12 a and apressing surface 12 b projecting vertically upward from themounting surface 12 a and having the projected plane depressed into a circular arc shape, where the curvature radius of thepressing surface 12 b is set to a value larger than the curvature radius of the outer peripheral surface of thecurved part 3 d in the deformed longitudinalannular blank 3A. The regulatingdie 13 is formed at the end face on the side facing the opponent with aregulating surface 13 a having the projected plane depressed into a circular arc shape. Furthermore, a holdinginner die 16 projecting upward from the upper surface at the central part of thebase 15 and having a boat shape in projected plane view is arranged extending in the direction of the line X, where the width dimension of the holdinginner die 16 is set to a dimension slightly smaller than the width dimension of thelongitudinal hole 3 e so as to be fitted to thelongitudinal hole 3 e of the deformed longitudinalannular blank 3A. A circular arc shapedholding surface 16 a is arranged vertically at both ends on the line X of the holdinginner die 16, and a cut-outpart 16 b is formed on the lower side of theholding surface 16 a and the vicinity thereof. - As shown in
FIG. 5 , after the longitudinalannular blank 3A is set in thesecond shaping device 11 with the holdinginner die 16 sandwiched by thelinear parts curved part 3 d and the vicinity of the blank 3A mounted on themounting surface 12 a of the moldingouter die 12, anupper die 17 shown by a double chain-dashed line is lowered from above. The upper surfaces of the regulatingdie 13 and the holdinginner die 16 are pressed by the lower surface of theupper die 17, and the upper surfaces of the longitudinal annular blank 3A and the moldingouter die 12 face the lower surface of theupper die 17 by way of an extremely small gap (small gap allowing slide movement) thereby preventing the warp of the blank 3A. - The molding
outer dies 12 are moved in the direction of the arrows X1, X2 in this state. Thepressing surface 12 b of the moldingouter die 12 thereby presses and energizes the outer side of thecurved part 3 d of the deformed longitudinalannular blank 3A towards thecurved part 3 d on the opponent side. In this case, themounting surface 12 a of the moldingouter die 12 enters the cut-outpart 16 b of the holdinginner die 16. Therefore, as shown inFIG. 6 , bothcurved parts 3 d are deformed along thepressing surface 12 b when the radial outer surface of large curvature radius is pressed inward from the outer side by thepressing surface 12 b depressed into a circular arc shape of the molding outer die 12 in a state wherein the radial inner surface is slightly pressed and widened by the circular arc shaped holdingsurface 16 a of the holdinginner die 16 and positioned with the movement in the directions of the arrows X1, X2 regulated, and thus “extension” is generated in the radial outer region having large curvature radius and “extension” in the radial inner region having small curvature radius in thecurved part 3 d are suppressed as much as possible, thickness of the radial inner region is avoided from being thinned, and furthermore, flow of material that thickens thecurved part 3 d is generated so as to alleviate stress concentration at the radial inner region. As a result, bothcurved parts 3 d can be molded into a largecurved part 3D having a large curvature radius advantageous in manufacturing the ring-shapedmember 1 without generating cracks at thecurved part 3 d, and thus the yield rate or the percentage of the ring-shapedmember 1 with respect to the longitudinal annular blank 3A can be improved. - In the process of molding both
curved parts 3 d to the largecurved part 3D having a large curvature radius, thelinear parts FIG. 5 are widened in the direction of the arrows Y1, Y2 thereby forming a curved bulge-out-part 3E at the central part, as shown inFIG. 6 , where the deformed longitudinal annular blank 3A (seeFIG. 5 ) is regulated from widening in excess in the direction of the arrows Y1, Y2 when the outer surface of the bulge-outpart 3E contacts the regulatingsurface 13 a depressed into a circular arc shape of the regulating die 13, and a half-finished article 18 including a pair of largecurved parts 3D of large curvature radius and a pair of curved bulge-outparts 3E, and having the largecurved parts 3D and the bulge-outparts 3E continuously connected to each other by way of four shortlinear parts 3F is molded. - The half-
finished article 18 shown inFIG. 6 is further set in athird shaping device 19 shown inFIG. 7 in the next step. - The
third shaping device 19 includes abase 20, and anupper plate 21 for blocking the upper surface of the base 20 by way of a spacing in the height direction, where aguide groove 22 is formed in thebase 20 on the line X passing through the center, and a movingplate 23 that freely moves forward and backward in the direction of the arrows X1, X2 is fitted into theguide groove 22. The movingplate 23 moves forward and backward in the direction of the arrows X1, X2 by a forward/backward moving mechanism (not shown). The upper surface of the movingplate 23 is in plane with the upper surface of thebase 20, and a finishinginner die 24 having an elliptical shape in a projected plane view is arranged at the central part so as to project upward on a line Y passing through the center of thebase 20 and being orthogonal to the line X. The finishinginner die 24 faces awindow part 25 of a substantially perfect circle formed on theupper plate 21, and the inner peripheral surface of thewindow part 25 functions as an outer die. - As shown in
FIG. 7 , when the half-finished article 18 is set in thethird shaping device 19, anupper die 26 shown with a double chain-dashed line is lowered from above. The upper surface of theupper plate 21 is thereby pressed by the lower surface of theupper die 26, and the upper surfaces of the half-finished article 18 and the finishinginner die 24 face the lower surface of theupper die 26 by way of an extremely small gap (small gap allowing slide movement) thereby preventing the warp of the half-finished article 18. - The moving
plate 23 is moved in the direction of the arrow X2 in such state. The finishinginner die 24 presses and energizes the right half portion of the half-finished article 18 in the direction of the arrow X2 from the inner side and presses the outer peripheral surface of the right half portion against the inner peripheral surface of the right half portion in thewindow part 25 of a substantially perfect circle, as shown inFIG. 8 , thereby molding the right half portion of the half-finished article 18 into a semicircle. Subsequently, the movingplate 23 is moved in the direction of the arrow X1. The finishinginner die 24 thereby presses and energizes the left half portion of the half-finished article 18 in the direction of the arrow X1 from the inner side and presses the outer peripheral surface of the left half portion against the inner peripheral surface of the left half portion in thewindow part 25 of a substantially perfect circle as shown inFIG. 9 , thereby molding the left half portion of the half-finished article 18 into a semicircle to manufacture a ring-shapedmember 1 shown inFIG. 9 andFIG. 12 . - Therefore, according to the present invention, the ring-shaped
member 1 shown inFIG. 9 andFIG. 12 is manufactured by punching out a plurality of longitudinalannular blanks 3 from araw material 2 shown inFIG. 1 , and pressing and widening the longitudinalannular blanks 3 to be molded into an annular shape by first tothird shaping devices member 1 with respect to the weight of theraw material 2 can be improved, and the cost of the ring-shapedmember 1 can be reduced by removing the material such that the percentage of the skeleton S1 and the slug S2 ofFIG. 1 with respect to the ring-shapedmember 1 is suppressed lower than the percentage of the skeleton S1 and the slug S2 with respect to the ring-shapedmember 1 described inFIG. 13 . - Furthermore, each
curved part 3 d is deformed along thepressing surface 12 b when the radial outer surface of large curvature radius is pressed inward from the outer side by thepressing surface 12 b depressed into a circular arc shape of the molding outer die 12 in a state wherein the radial inner surface is slightly pressed and widened by the circular arc shaped holdingsurface 16 a of the holdinginner die 16 and positioned with the movement in the directions of the arrows X1, X2 regulated by pressing and energizing the outer side of the pair ofcurved parts 3 d of the deformed longitudinal annular blank 3A towards thecurved part 3 d on the opponent side by thepressing surface 12 b depressed to a circular arc shape of the molding outer die 12 by thesecond shaping device 11, and thus “extension” in the radial outer region having large curvature radius is suppressed as much as possible, the thickness of the radial inner region is avoided from being thinned, and furthermore, flow of material that thickens thecurved part 3 d is generated so as to alleviate stress concentration at the radial inner region. As a result, bothcurved parts 3 d can be molded into a largecurved part 3D having a large curvature radius and advantageous in manufacturing the ring-shapedmember 1 without generating cracks at thecurved part 3 d, and thus the yield rate or the percentage of the ring-shapedmember 1 with respect to the longitudinal annular blank 3A can be improved and the cost of the ring-shapedmember 1 can be reduced. - In the above embodiment, the longitudinal annular blank 3 having a small width dimension w1 of the
longitudinal hole 3 a is punched out, and such blank 3 is pressed and widened to manufacture the ring-shapedmember 1, as shown inFIG. 2 , but, as shown inFIG. 10 , a longitudinal annular blank 27 having alongitudinal hole 27 a of oval shape in which the width dimension w3 is sufficiently larger than the width dimension w1 ofFIG. 2 may be punched out, and such blank 27 may be pressed and widened through the same procedures as the above embodiment to be molded into the ring-shapedmember 1. In this case as well, the yield rate or the percentage of the ring-shapedmember 1 with respect to the longitudinal annular blank 27 can be improved and the cost of the ring-shapedmember 1 can be reduced, similar to the above embodiment. - In punching out a plurality of longitudinal
annular blanks raw material 2 of a predetermined width, as shown inFIGS. 11( a) and 11(b), material can be removed with both end edges in the width direction of the longitudinal annular blank 3, 27 lying along both ends 2 a in the width direction of theraw material 2. More specifically, the outer end edges of thelinear parts end edges 2 a in the width direction of theraw material 2, and a pair ofcurved parts 3 d for continuing the pair oflinear parts raw material 2 with the pressing device. Therefore, the material can be removed such that the percentage of the scrap with respect to the longitudinal annular blank 3, 27 is suppressed to a minimum. In other words, the scraps are reduced to the slug S1 punched out and removed by punch in time of punching out thelongitudinal hole end plate part 2 x of drum shape existing between the longitudinalannular blanks 3 orblanks 27 arrayed in the longitudinal direction and to be separated away from theraw material 2, as shown by slashed lines inFIGS. 11( a) and 11(b). As a result, the yield rate or the percentage of the weight of the ring-shapedmember 1 with respect to the weight of theraw material 2 can be further improved. - The method of manufacturing the ring-shaped member of the present invention also has the following features.
- The longitudinal annular blank 3 is molded into an annular shape by pressing the
curved part 3 d at both ends in the longitudinal direction towards the opponent side from the outer side. The material can be removed such that the percentage of the skeleton and the slug with respect to the ring-shapedmember 1 is suppressed low, and the yield rate or the percentage of the weight of the ring-shapedmember 1 with respect to the weight of the raw material can be improved. Furthermore, since thecurved parts 3 d at both ends in the longitudinal direction are pressed towards the opponent side from the outer side, the “extension” of the radial inner region having a small curvature radius at thecurved part 3 d can be suppressed as much as possible, thinning of the radial inner region is avoided, and furthermore, the flow of material that thickens thecurved part 3 d is generated and alleviates the stress concentration of the radial inner region. As a result, cracks are not generated at thecurved part 3 d, and the yield rate or the percentage of the ring-shapedmember 1 with respect to the longitudinal annular blank 3 can be improved. - The longitudinal annular blank 3 is desirably molded into an annular shape by shaping
devices inner die outer die member 1 of high quality is thereby efficiently manufactured and cost can be reduced. - Moreover, preferably, the longitudinal annular blank 3 includes
linear parts longitudinal hole 3 a on the inner side, andcurved parts 3 d for continuing both ends in the longitudinal direction of thelinear parts linear parts longitudinal hole 3 a, and thereafter, the outer side of thecurved parts 3 d is pressed and energized towards thecurved part 3 d on the opponent side with the molding outer die 12 with the holdinginner die 16 fitted into thelongitudinal hole 3 a which dimension in the width direction is widened, thereby pressing and widening thecurved parts 3 d to largecurved parts 3D having a large curvature radius. - Therefore, after widening the dimension in the width direction of the longitudinal annular blank 3 by the inner die 8-1 fitted into the
longitudinal hole 3 a and pressing and energizing the outer side of thecurved part 3 d toward thecurved part 3 d on the opponent side by the molding outer die 12 with the holdinginner die 16 fitted into thelongitudinal hole 3 a which dimension in the width direction is widened, thecurved parts 3 d are pressed inward from the outer side by the molding outer die 12 while being positioned with the movement towards thecurved part 3 d on the opponent side regulated by the holdinginner die 16, whereby “extension” of the radial inner region having a small curvature radius in thecurved part 3 d is suppressed as much as possible, thinning of the radial inner region is avoided, and stress does not concentrate at the radial inner region, so that bothcurved parts 3 d are readily molded into the largecurved parts 3D having a large curvature radius without generating cracks at thecurved parts 3 d.
Claims (3)
1. A method of manufacturing a ring-shaped member, wherein a plurality of longitudinal annular blanks is punched out from a raw material of a predetermined width, and the longitudinal annular blank is molded into an annular ring-shaped member.
2. The method of manufacturing the ring-shaped member according to claim 1 , wherein the material is removed such that both end edges in the width direction of the blank lie along both ends in the width direction of the raw material when punching out the blank from the raw material.
3. The method of manufacturing the ring-shaped member according to claim 2 , wherein the blank includes linear parts facing each other at both sides in the width direction and a pair of curved parts for continuing both ends in the longitudinal direction of the linear parts, the outer end edges of the linear parts of the blank being formed by both end edges in the width direction of the raw material.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPPCT/JP2005/018840 | 2005-10-13 | ||
PCT/JP2005/018840 WO2007043176A1 (en) | 2005-10-13 | 2005-10-13 | Method of manufacturing ring-shaped member |
PCT/JP2006/320287 WO2007043565A1 (en) | 2005-10-13 | 2006-10-11 | Method for manufacturing ring-shaped member |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090158808A1 true US20090158808A1 (en) | 2009-06-25 |
Family
ID=37942445
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/083,237 Expired - Fee Related US7849724B2 (en) | 2005-10-13 | 2005-10-13 | Method of manufacturing a ring-shaped member |
US12/083,232 Abandoned US20090158808A1 (en) | 2005-10-13 | 2006-10-11 | Method for Manufacturing Ring-Shaped Member |
US12/083,231 Abandoned US20090158803A1 (en) | 2005-10-13 | 2006-10-11 | Method of Manufactring Ring-Shaped Member |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/083,237 Expired - Fee Related US7849724B2 (en) | 2005-10-13 | 2005-10-13 | Method of manufacturing a ring-shaped member |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/083,231 Abandoned US20090158803A1 (en) | 2005-10-13 | 2006-10-11 | Method of Manufactring Ring-Shaped Member |
Country Status (6)
Country | Link |
---|---|
US (3) | US7849724B2 (en) |
EP (3) | EP1946862A1 (en) |
JP (1) | JP4496215B2 (en) |
KR (2) | KR20080039518A (en) |
CN (3) | CN100553820C (en) |
WO (3) | WO2007043176A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090301162A1 (en) * | 2008-06-06 | 2009-12-10 | Yahya Hodjat | Method of making a ring |
CN101791656A (en) * | 2010-03-11 | 2010-08-04 | 杭州兴意金属制造有限公司 | Stamping and discharging method for brake shoe rib plate |
CN102513780A (en) * | 2011-12-22 | 2012-06-27 | 西南铝业(集团)有限责任公司 | Forging process of large forged ring |
RU2645419C1 (en) * | 2016-12-06 | 2018-02-21 | Александр Иванович Максимов | Device for aligning curved wall of tube from aluminum foil for packaging |
RU2646176C1 (en) * | 2016-12-12 | 2018-03-01 | Александр Иванович Максимов | Method for slabbing curvilinear wall of tube from aluminum foil for packaging |
CN110184836B (en) * | 2019-05-31 | 2021-05-07 | 燕山大学 | Automatic hook device for steel wire of steel wire rope |
CN113829063B (en) * | 2021-09-23 | 2024-02-20 | 周六福珠宝股份有限公司 | Diamond ring cutting device |
CN114700435B (en) * | 2022-02-24 | 2024-03-15 | 永康市中景金属制品有限公司 | Metal ring stamping equipment and ring piece manufacturing method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1839530A (en) * | 1929-03-07 | 1932-01-05 | Victor F Braun | Method and apparatus for forming rings |
Family Cites Families (11)
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US1091751A (en) * | 1913-03-12 | 1914-03-31 | Pittsburgh Steel Products Co | Method of forming axle-housings. |
US2670025A (en) * | 1951-03-14 | 1954-02-23 | Moore Drop Forging Company | Apparatus for spreading split bars to circular forms |
FR2462215A1 (en) * | 1979-07-26 | 1981-02-13 | Ferodo Sa | METHOD FOR CONFORMING A TUBE ESPECIALLY FOR HEAT EXCHANGER AND HEAT EXCHANGER WITH TUBES SO COMPLIANT |
JPS58128231A (en) * | 1982-01-28 | 1983-07-30 | Honda Motor Co Ltd | Blanking method of blank material for automobile body |
JPH0647139B2 (en) | 1986-03-01 | 1994-06-22 | 株式会社日立製作所 | Ring flange molding method and molding apparatus |
JPS6442721U (en) * | 1987-09-10 | 1989-03-14 | ||
IT1261103B (en) * | 1993-10-29 | 1996-05-09 | Borletti Climatizzazione | PROCEDURE FOR CONFORMING ACCORDING TO A CIRCULAR CROSS SECTION THE END OF AN OBLONG CROSS SECTION TUBE. |
DE60044487D1 (en) * | 1999-10-22 | 2010-07-15 | Honda Motor Co Ltd | Process for producing a laminated ring |
SE0100143L (en) * | 2001-01-17 | 2002-07-18 | Lindab Ab | Coupling ring and device and method for using it |
JP4698890B2 (en) * | 2001-03-28 | 2011-06-08 | 坂本工業株式会社 | Processing method of protruding part of deformed pipe |
US6655182B2 (en) * | 2001-05-18 | 2003-12-02 | Lindab Ab | Apparatus and method for reshaping tubes |
-
2005
- 2005-10-13 EP EP05793177A patent/EP1946862A1/en not_active Withdrawn
- 2005-10-13 WO PCT/JP2005/018840 patent/WO2007043176A1/en active Application Filing
- 2005-10-13 JP JP2006522833A patent/JP4496215B2/en not_active Expired - Fee Related
- 2005-10-13 US US12/083,237 patent/US7849724B2/en not_active Expired - Fee Related
- 2005-10-13 CN CNB2005800517977A patent/CN100553820C/en not_active Expired - Fee Related
-
2006
- 2006-10-11 US US12/083,232 patent/US20090158808A1/en not_active Abandoned
- 2006-10-11 EP EP06811594A patent/EP1949985A1/en not_active Withdrawn
- 2006-10-11 KR KR1020087007293A patent/KR20080039518A/en not_active Application Discontinuation
- 2006-10-11 WO PCT/JP2006/320287 patent/WO2007043565A1/en active Application Filing
- 2006-10-11 WO PCT/JP2006/320285 patent/WO2007043564A1/en active Application Filing
- 2006-10-11 EP EP06811592A patent/EP1949984A1/en not_active Withdrawn
- 2006-10-11 CN CN2006800374164A patent/CN101282800B/en not_active Expired - Fee Related
- 2006-10-11 CN CN2006800374855A patent/CN101282801B/en not_active Expired - Fee Related
- 2006-10-11 KR KR1020087007294A patent/KR100990308B1/en not_active IP Right Cessation
- 2006-10-11 US US12/083,231 patent/US20090158803A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1839530A (en) * | 1929-03-07 | 1932-01-05 | Victor F Braun | Method and apparatus for forming rings |
Also Published As
Publication number | Publication date |
---|---|
JP4496215B2 (en) | 2010-07-07 |
EP1949985A1 (en) | 2008-07-30 |
US7849724B2 (en) | 2010-12-14 |
CN101282801B (en) | 2010-05-19 |
WO2007043176A1 (en) | 2007-04-19 |
CN100553820C (en) | 2009-10-28 |
EP1949984A1 (en) | 2008-07-30 |
WO2007043565A1 (en) | 2007-04-19 |
KR100990308B1 (en) | 2010-10-26 |
US20090255318A1 (en) | 2009-10-15 |
JPWO2007043176A1 (en) | 2009-04-16 |
CN101282800A (en) | 2008-10-08 |
WO2007043564A1 (en) | 2007-04-19 |
CN101282801A (en) | 2008-10-08 |
KR20080039519A (en) | 2008-05-07 |
US20090158803A1 (en) | 2009-06-25 |
CN101282800B (en) | 2010-08-11 |
EP1946862A1 (en) | 2008-07-23 |
CN101282799A (en) | 2008-10-08 |
KR20080039518A (en) | 2008-05-07 |
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Owner name: KANEMITSU CORPORATION,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANEMITSU, TOSHIAKI;KANEMITSU, SHUJI;ODA, MISAO;AND OTHERS;REEL/FRAME:020821/0989 Effective date: 20080325 |
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