EP1066893A1 - Biegevorrichtung von metalplatte - Google Patents

Biegevorrichtung von metalplatte Download PDF

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Publication number
EP1066893A1
EP1066893A1 EP99973573A EP99973573A EP1066893A1 EP 1066893 A1 EP1066893 A1 EP 1066893A1 EP 99973573 A EP99973573 A EP 99973573A EP 99973573 A EP99973573 A EP 99973573A EP 1066893 A1 EP1066893 A1 EP 1066893A1
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EP
European Patent Office
Prior art keywords
lower bar
molds
bar molds
metal plate
metal
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.)
Withdrawn
Application number
EP99973573A
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English (en)
French (fr)
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EP1066893A4 (de
Inventor
Takaaki Yuugenkaisha Taigaa Koosan MAEDA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yuugenkaisha Taigaa Koosan
Original Assignee
Yuugenkaisha Taigaa Koosan
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP10373221A external-priority patent/JP2000197918A/ja
Priority claimed from JP11049048A external-priority patent/JP2000246341A/ja
Priority claimed from JP11049047A external-priority patent/JP2000246340A/ja
Application filed by Yuugenkaisha Taigaa Koosan filed Critical Yuugenkaisha Taigaa Koosan
Publication of EP1066893A1 publication Critical patent/EP1066893A1/de
Publication of EP1066893A4 publication Critical patent/EP1066893A4/de
Withdrawn legal-status Critical Current

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    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor

Definitions

  • the present invention relates to the apparatus for bending metal plates by the use of special metal molds.
  • this apparatus is characterized in that it is provided with the rotary control gadget.
  • Such apparatus is used as a bender for bending metal plates (press brake), oil pressure press, air pressure press, mechanical press, etc.
  • the lower plane mold provided with a groove therein and the upper punching mold.
  • the metal plate is placed in the groove of the lower plane mold. Then, the metal plate is pressed into the groove of the lower mold and thereby bent.
  • the groove of the lower plane mold is limited in size and shape, the lower plane mold is required to change the size and shape of the groove for taking care of the thickness of the metal plate to be bent and the bending degree required.
  • several scores of the lower plane molds provided with the different size and shape of grooves are required to be prepared. This causes a larger cost in equipment. Not only that, but a space is required for storing such number of the lower plane molds. This is a problem in terms of space economy
  • the lower mold is required to be changed , whenever necessary, depending upon the purpose for which it is used.
  • the above apparatus is labor-consuming and lowers an operational efficiency.
  • the acute bending accuracy desired is not likely to be obtained because the tip part of the groove is wide.
  • the thick metal plate is bent, scratches are liable to be formed on the surface of the metal plate, because the groove gets tight in its tip part.
  • the pressure of the upper mold is rectangularly, by way of the metal plate, imposed on the groove of the lower plane mold.
  • an excessive pressure causes the friction between the surface of the metal plate and the groove surface of the lower mold.
  • scratches on the surface of the metal plate Such scratches produce the inferior appearance on the products made of the metal plate bent in such manner. This is another disadvantage.
  • the metal plate is placed on the groove of the lower plane mold and then bent by pressing it down by the upper mold.
  • the metal plate tends to get out of place. Even when the tip part of the metal plate can be bent, its bending accuracy tends to be insufficient or unsatisfactory.
  • the object of the present invention is that, Unlike the conventional lower plane mold, the lower plane mold of the present invention is not required to use scores of plane molds in different size and shape for taking care of the thickness of metal plates to be bent or the bending degrees required.
  • the metal plate may be optionally bent by the use of one or a few pairs of lower molds.
  • the present invention makes it unnecessary to change lower molds and thereby improves work performance.
  • the further object of the present invention is that, when bending the meal plate by the use of the aforementioned one or a few pairs of rotary lower mold, the pressure of the upper mold is correctly conveyed to the metal plate.
  • the pressure of the upper mold conveyed through the metal plate to the groove surface of the lower mold is caused to be released.
  • the further object of the present invention is that, by receiving the pressure of the upper mold at the entire metal contact surfaces of two (2) lower bar molds, such pressure is dispersed and thereby the physical texture of the metal plate is made free from any damage or deterioration. Thereby, cracks are prevented from being formed on the metal plate. Thus, the physical strength of the metal plate is maintained.
  • the further object of the present invention is that, even if the stroke of the upper mold does not reach the lower dead point, it becomes possible to bend the metal plate and, thereby the shock by the pressure (stroke) is mitigated from the upper mold. Further, there is made smaller the friction between the groove surfaces of the lower mold and the metal plate from the pressure of the upper mold. No scratches and damage are formed on the groove surface of the lower mold. Thereby, the groove of the lower mold is prevented from being abraded or worn out.
  • the further object of the present invention is that, even when the tip part is bent or the bending length is short, the metal plate is accurately bent without running off the groove.
  • the object of the present invention is to control the rotation of two (2) lower bar molds by the use of one or a few pairs of rotary lower molds having such rotary control gadget as spring, etc. without making the metal contact surfaces of two(2) bar molds run off the metal plate.
  • the pressure of the upper mold is properly conveyed to the metal plate.
  • the metal plate is accurately and nicely bent, adjusting the bending angle (R) of the metal plate in accordance with the object for which it is used. Thereby, the bending performance is improved.
  • the pressure of the upper mold is properly conveyed to the metal plate by preventing the metal contact surfaces of two (2) lower bar molds from running off the metal plates.
  • the bending angle (R) of the metal plate is made acute and the metal plate is precisely bent. Thereby, the bending accuracy is improved. This is the further advantage of the present invention.
  • the further object of the present invention is that, the metal contact surfaces of the two (2) bar molds are not required to be manually restored to the original position.
  • the metal contact surfaces of the two (2) lower bar molds are automatically caused to rotate inversely and return to the horizontal position.
  • the present invention relates to the apparatus for bending metal plates.
  • the metal plate is bent by pressing the metal plate by the upper mold against the lower mold.
  • Two (2) lower bar molds semicircular in section are prepared as the lower mold.
  • two (2) bar molds semicircular in section are prepared as the lower molds.
  • the curbed convex surfaces of two lower bar molds are slidably placed on the support provided with two (2) concave surfaces having the groove in the intermediate of the surfaces.
  • the metal plate is placed on the metal contact surfaces of the two (2) lower bar molds.
  • the metal plates are pressed by the upper mold against the lower mold. Simultaneously, the metal contact surfaces of two(2) lower bar molds are caused to rotate inwardly , and the metal plates is bent.
  • the invention is characterized of being provided with such mechanism. Thereby, the metal plates are precisely bent at the acute angle.
  • this invention is characterized in that, referring to the aforementioned apparatus for bending metal plates, two (2) lower bar molds in normal use are removed from the two (2) curbed concave surfaces of the support, the two (2) curbed convex surfaces, semicircular in section, of the adapter forming the two (2) smaller-sized curbed concave surfaces on the two (2) curbed concave surfaces of the support, the convex surfaces of the smaller-sized two (2) lower bar molds, semicircular in section, are placed so as to rotate slidably on the two (2) smaller-sized curbed concave surfaces forming the adapter, the metal contact surfaces of the two (2) smaller-sized bar molds are caused to rotate slidably in the inner direction and thereby, metal plates are bent.
  • This metal bending apparatus is characterized in that , when using this apparatus, the two (2) ordinary lower bar molds are replaced with the two (2) smaller-sized lower bar molds.
  • the aforementioned of the present invention for bending metal plates is characterized by using the lower bar molds wherein the adjoining curbed convex surfaces of the lower bar molds, semicircular in section, positioned in parallel is cut off in the perpendicular direction against the metal contact surfaces.
  • Lower bar molds are made thinner.
  • the space between the lower bar molds is made smaller. Thereby, the bending performance of the metal plate is further improved.
  • the present invention relates to the apparatus for bending metal plates.
  • the metal plate is bent by pressing the metal plate by the upper mold against the lower mold.
  • Two (2) lower bar molds semicircular in section are prepared as the lower mold.
  • two (2) bar molds semicircular in section are prepared as the lower molds.
  • a rotary control plumb is attached to the upper outer lengthwise end of the curbed concave surface of each lower bar mold.
  • the curbed convex surfaces of two lower bar molds are slidably placed on the support provided with two (2) concave surfaces having the groove in the intermediate of the surfaces.
  • the metal plate is placed on the metal contact surfaces of the two (2) lower bar molds.
  • the metal plates are pressed by the upper mold against the lower mold.
  • the metal contact surfaces of two(2) lower bar molds are caused to rotate inwardly against the gravity of the rotary control plumb, and the metal plates is bent.
  • the invention is characterized of being provided with such mechanism.
  • the present invention is characterized by being provided with the following mechanism.
  • the metal plate is bent by pressing the metal plate against the lower mold.
  • Two (2) lower bar molds semicircular in section are prepared as the lower mold.
  • the rotary control gadget, such as spring, etc. is attached to the alligator or concave surface of each lower bar mold.
  • These two (2) lower bar molds are slidably placed on the support provided with two (2) curbed concave surfaces having the groove in the intermediate of the surfaces.
  • the metal plate is put on the metal contact surfaces of two (2) lower bar molds and the metal plate is pressed against the lower mold by the upper mold. Simultaneously, the metal contact surfaces of two (2) lower bar molds are caused to rotate inwardly against such restraint as the resilience, etc. of the rotary control gadget, etc. This improves the accuracy of the metal plate bending.
  • the metal mold of the apparatus comprises the ordinary upper punch shape mold 1 and the lower mold 3 consisting of two (2) lower bar molds 2a and 2b semicircular in section.
  • Some of apparatuses for bending metal plates comprise these two (2) lower bar molds 2a and 2b semicircular in section additionally placed on the support 4.
  • the two (2) bar molds 2a and 2b semicircular in section are provided with curbed convex surfaces 5a and 5b thereunder and metal contact surfaces 6a and 6b thereon.
  • the curbed convex surfaces 5a and 5b of these two (2) bar molds 2a and 2b are placed, as shown in Figure 2, on the curbed concave surfaces 7a and 7b formed on the support 4.
  • the curbed convex surfaces 5a and 5b of the two (2) bar molds 2a and 2b are caused to rotate slidably and metal contact surfaces 6a and 6b are caused to incline.
  • the metal plate 8 is pressed downwardly by lowering the upper mold 1.
  • the metal contact surfaces 6a and 6b of the two (2) lower bar molds 2a and 2b are caused to rotate slidably in the inner direction.
  • the groove 13 spacious enough to lower the upper mold 1 between the curbed concave surfaces 7a and 7b formed on the support 4.
  • the lower bar molds 2a and 2b are made in semicircular in section. In addition to those semicircular in section, as shown in Figure 4, the round bar is lengthwise cut off in about 2/3 section. As shown in Figure 5, the round bar is lengthwise cut off in about 1/3 in section,. These are included in the concept of "semicircular section" of the present invention.
  • the stroke of the upper mold 1 is caused to move down to the position of the desired bending angle and simultaneously the metal contact surfaces 6a and 6b of the low bar molds 2a and 2b are caused to be inclined in the V-shape.
  • the metal plate 8 is acutely bent in the V-shape.
  • the stroke of the upper mold 1 is not caused to move down to the position immediately before the separation of the metal contact surfaces 6a and 6b at their inner ends, namely, the position as previously shown in Figure 3.
  • the stroke thereof is suspended halfway In such way, the bending degree of the metal plate 8 may be undoubtedly allowed to be made obtuse.
  • the bending degree of the metal plate 8 may be adjusted by the stroke of the upper mold 1.
  • the stroke of the upper mold 1 is shallow, the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are slightly inclined. The bending degree of the metal plate 8 becomes larger.
  • the bending degree of the metal plate may be likewise adjusted by the position of metal contact surfaces 6a and 6b of lower bar molds 2a and 2b.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are cut off, as shown in Figure 4, lengthwise in about 1/3 of the round bar section. Namely, when the metal contact surfaces 6a and 6b are positioned above in semicircular section, the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are more inclined by the slidable rotation of two (2) lower bar molds 2a and 2b.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are cut off lengthwise, as shown in Figure 5, in about 2/3 of the round bar section. Namely, when the metal contact surfaces 6a and 6b are positioned below in semicircular section, the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are less inclined by the slidable rotation of two lower bar molds 2a and 2b.
  • two (2) lower bar molds 2a and 2b constituting the lower bar molds 3 employed for the aforementioned apparatus for bending metal plates are removed, as shown in Figure 6, from the two (2) curbed concave surfaces 7a and 7b of the support 4.
  • the adapter 9 is removably placed on the two (2) curbed concave surfaces 7a and 7b of this support 4.
  • the two (2) smaller-sized concave surfaces 10a and 10b are formed on the upper part of the adapter 9. Simultaneously, there are formed thereunder two (2) curbed convex surfaces 11a and 11b semicircular in section.
  • the two (2) curbed convex surfaces 11a and 11 b, semicircular in section, of the adapter 9 are placed on the two (2) curbed concave surfaces 7a and 7 bof the support 4.
  • the two (2) smaller-sized lower bar molds 12a and 12b, semicircular in section, are placed so as to rotate slidably on the two (2) smaller-sized curbed concave surfaces 10a and 10b of the adapter 9.Thus, the metal plate 8 is bent, as mentioned above.
  • the metal plate bending mechanism by means of two (2) smaller-sized lower bar molds 12a and 12b semicircular in section placed on the adapter 9 is the same as mentioned above. Therefore, the explanation thereof is omitted.
  • the same material is used as for the aforementioned lower bar molds 2a and 2b.
  • the size of the two (2) curbed convex surfaces 11a and 11b of the adapter 9 is made the same as that of the curbed convex surfaces 5a and 5b of the two (2) lower bar molds 2a and 2b.
  • the length and thickness of two (2) smaller-sized lower bar molds 12a and 12b of the adapter 9 may be optionally determined by the thickness and quality of the metal plate 8 to be bent and the desired bending angle of the metal plate 8, etc.
  • the lower bar molds 12a and 12b would be sufficient, if 3 ⁇ 100cm in length and if 0.5 ⁇ 100mm in thickness respectively.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 12a and 12b would be sufficient, if 0.3mmx 3cm ⁇ 100mm x 200cm in size.
  • the two (2) lower bar molds 2 and 2b, provided with the adjoining curbed convex surfaces, constituting the upper mold 3 are cut off lengthwise and perpendicularly, as shown in Figure 7, against the metal contact surfaces 6a and 6b and the surface 10 is formed.
  • Two (2) lower bar molds 2a and 2b are placed more closely in parallel. Thereby, the bending angle of the metal plate 8 may be made smaller. Thereby, the thickness of lower bar molds 2 and 2b may be made smaller.
  • any materials provided with higher hardness and abrasion resistance may be preferably used, such as metal mold steel, bearing steel, chrome-molybdenum steel, etc. Ordinary steel and surface-hardened steel may also be used.
  • the length and thickness of lower bar molds 2a and 2b may be optionally determined by the thickness and quality of the metal plate 8 to be bent and the desired bending angle of the metal plate 8, etc.
  • the lower bar molds 2a and 2b would be sufficient, if 1 ⁇ 500 cm in length and if 0.5 ⁇ 300 cm in diameter respectively.
  • the metal contact surfaces 6a and 6b area of lower bar molds 2a and 2b would be sufficient, if 1 x 5 cm ⁇ 300 x 500 cm in size.
  • the material for the support 4 there may be used the same material as that for lower bar molds 2a and 2b.
  • the size of the support 4 would be satisfied if it is made larger than two (2) lower bar molds 2a and 2b.
  • the downward pressure of the upper mold 1 is reduced and further the downward pressure of the upper mold 1 on the lower mold 3 is released through the metal plate 8. .Because of such release, no scratches are caused by the friction between the metal plate 8 and lower bar molds 2a and 2b.
  • the resultant metal plate 8 is provided with better outer appearance.
  • the upper mold 1 is caused to return to the original position. Then, the bent metal plate 8 is taken out of the lower mold 3. It is required that the lower bar molds 2a and 2b of mold 3 be caused to rotate inversely so that the lower bar molds 2a and 2b of the mold 3 may return to the horizontal position.
  • the lower bar molds 2a and 2b are not capable of being satisfactorily restored to their original positions by their own weight alone. Their restoration requires manual labor. Thus, work performance is lowered. This is another disadvantage.
  • the lower mold 3 comprises two lower bar molds 2a and 2b semicircular in section.
  • the rotary control plumb is attached to the upper lengthwise ends on the curbed concave surfaces of two (2) lower bar molds 2a and 2b. These two lower bar molds 2a and 2b are placed on the support 4. This is the structure of the apparatus provided with the rotary control gadgets for bending metal plates.
  • Two (2) lower bar molds 2a and 2b semicircular in section are provided with the curbed convex surfaces 5a and 5b thereunder and the metal contact surfaces 6a and 6b thereon.
  • the curbed convex surfaces 5a and 5b of these two (2) lower bar molds 2a and 2b are placed on the two (2) curbed concave surfaces 7a and 7b formed on the support 4.
  • the curbed convex surfaces 5a and 5b of two (2) lower bar molds 2a and 2b are caused to rotate slidably in the inner direction and the metal contact surfaces 6a and 6b are caused to incline in the V-shape.
  • the metal plate 1 For bending metal plate 8, the metal plate 1 is placed on the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b. Thereafter, as shown in Figure 10 , the upper mold 1 is caused to move downwardly and the metal plate 8 is pressed downwardly. While so doing, the metal contact surfaces 6a and 6b of lower bar molds 2a and 2b are caused to rotate slidably in the inner direction in such manner as to be in the V-shape against the plumb of the rotary control plumbs 15. Thus, the bending of metal plate 8 is started.
  • the stroke of the upper mold 1 is caused to move down to the position of the desired bending angle and simultaneously the metal contact surfaces 6a and 6b of the low bar molds 2a and 2b are caused to be inclined in the V-shape.
  • the metal plate 8 is acutely bent in the V-shape.
  • the downward pressure of the upper mold 1 is accepted and dispersed at the entire mental contact surfaces 6a and 6b of the two (2) lower bard molds.
  • the resultant product made of such metal plate is provided with good outer appearance.
  • the stroke of the upper mold 1 is not caused to move down to the position immediately before the separation of the metal contact surfaces 6a and 6b at their inner ends, namely, the position as shown in Figure 10. This to say, the stroke thereof is suspended halfway
  • the bending degree of the metal plate 8 may be allowed to be made obtuse.
  • the downward motion of the upper mold 1 is stopped.
  • the upper mold 1 is caused to move upwardly and the pressing force is relieved.
  • the metal contact surfaces 6a and 6b of lower bar molds 2a and 2b are caused to automatically return to the horizontal position by the weight of the rotary control plumb 15. Then, the bent metal plate is taken out of the lower mold 3. Thereafter, the aforementioned operation may be repeated, whenever necessary.
  • the lower bar molds 2a and 2b provided with the spring 16 are made in semicircular in section. In addition to those semicircular in section, as shown in Figure 11, the round bar is lengthwise cut off in about 2/3 section. As shown in Figure 12, the round bar is lengthwise cut off in about 1/3 in section,. These are included in the concept of "semicircular section" of the present invention.
  • the bending degree of the metal plate 8 may be adjusted by the stroke of the upper mold 1.
  • the stroke of the upper mold 1 is shallow, the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are slightly inclined. The bending degree of the metal plate 8 becomes larger.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are cut off lengthwise, as shown in Figure 11, in about 2/3 of the round bar section. Namely, when the metal contact surfaces 6a and 6b are positioned below in semicircular section, the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are less inclined by the slidable rotation of two lower bar molds 2a and 2b.
  • the two (2) lower bar molds 2 and 2b, provided with the adjoining curbed convex surfaces, constituting the upper mold 3 are cut off lengthwise and perpendicularly, as shown in Figure 13, against the metal contact surfaces 6a and 6b and the surface 10 is formed.
  • Two (2) lower bar molds 2a and 2b are placed more closely in parallel. Thereby, the bending angle of the metal plate 8 may be made smaller. Thereby, the thickness of lower bar molds 2 and 2b may be made smaller.
  • the shape of rotary control plumb 15 provided at lower bar molds 2a and 2b may be in the shape of bar, board, block, or anything which may be used as a plumb. Further, the weight of the rotary control plumb 15 is required to be 1/5 ⁇ 1/20 th against the lower bar molds 2a and 2b.
  • any material provided with higher hardness and abrasion resistance may be used, such as metal mold steel, bearing steel, chrome-molybdenum steel, etc. Ordinary steel and ordinary surface-quenched steel may be also used.
  • the length and thickness of the rotary control plumb 15 may be optionally determined by the length of the lower bar molds 2a and 2b, the thickness and quality of the metal plate 8 to be bent, the bending angle of the metal plate 8,
  • the apparatus for bending metal plates comprises the ordinary upper punch type mold 1 and the lower mold 3 consisting of two (2) lower bar molds 2a and 2b semicircular in section.
  • This apparatus is further provided with the spring 16 as the rotary control gadget attached to the alligator parts of the lower bar molds 2a and 2b.
  • the two lower bar molds 2a and 2b are placed on the support 4.
  • the two (2) lower bar molds 2a and 2b semicircular in section are provided with the curbed convex surfaces 5a and 5b thereunder and the metal contact surfaces 6a and 6b thereon.
  • the curbed convex surfaces 5a and 5b of these lower bard molds 2a and 2b are placed on the two curbed concave surfaces 7a and 7b formed on the support 4.
  • the curbed convex surfaces 5a and 5b of two (2) lower bar molds 2a and 2b are caused to rotate slidably in the inner direction and the metal contact surfaces 6a and 6b are inclined in the V-shape.
  • the metal plate 8 For bending the metal plate 8, the metal plate 8 is placed on the mental contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b. Thereafter, as shown in Figure 11, the upper mold 1 is caused to move downwardly and the metal plate 8 is pressed in the downward direction.
  • the mental contact surfaces 6a and 6b of lower bar molds 2a and 2b are caused to rotate slidably in the inner direction against the resilience of the spring 16.
  • the rotation of the mental contact surfaces 6a and 6b of the lower bar molds 2a and 2b is controlled by the resilience of the spring 16 as the rotary control gadget.
  • the metal contact surfaces 6a and 6b are assuredly pressed to the metal plate 8.
  • the mental contact surfaces 6a and 6b of lower bar molds 2a and 2b are made not to slip away from the metal plate 8 and the downward pressure of the upper mold 1 is properly conveyed to the metal plate 8.
  • the stroke of the upper mold 1 is caused to move down to the position of the desired bending angle and simultaneously the metal contact surfaces 6a and 6b of the low bar molds 2a and 2b are caused to be inclined in the V-shape.
  • the metal plate 8 is acutely bent in the V-shape.
  • the downward pressure of the upper mold 1 is accepted and dispersed at the entire mental contact surfaces 6a and 6b of the two (2) lower bard molds.
  • the resultant product made of such metal plate is provided with good outer appearance.
  • the stroke of the upper mold 1 is not caused to move down to the position immediately before the separation of the metal contact surfaces 6a and 6b at their inner ends, namely, the position as previously shown in Figure 15.
  • the stroke thereof is suspended halfway In such way, the bending degree of the metal plate 8 may be undoubtedly allowed to be made obtuse.
  • the downward movement of the upper mold 1 is caused to stop.
  • the metal contact surfaces 6a and 6b of lower bar molds 2a and 2b are caused to return automatically to the horizontal position with the help of the resilience of the spring 16 as the rotary control gadget. Thereafter, the bent metal plate 8 is taken out of the lower mold 3. Thereafter, the same operation may be repeated, whenever necessary.
  • the lower bar molds 2a and 2b provided with the spring 16 are made in semicircular in section. In addition to those semicircular in section, as shown in Figure 12, the round bar is lengthwise cut off in about 2/3 section. As shown in Figure 13, the round bar is lengthwise cut off in about 1/3 in section,. These are included in the concept of "semicircular section" of the present invention.
  • the bending degree of the metal plate 8 This degree may be adjusted by the stroke of the upper mold 1.
  • the stroke of the upper mold 1 When the stroke of the upper mold 1 is shallow, the metal contact surfaces 6a and 6b of lower bar molds 2a and 2b are less inclined and the bending angle of the metal plate 8 becomes obtuse. Further, when the stroke of the upper mold 1 is deep, the metal contact surfaces 6a and 6b of two lower bar molds 2a and 2b are largely inclined and the bending angle of the metal plate 8 becomes acute.
  • the bending degree of the metal plate 8 may be likewise adjusted by the positions of the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b.
  • the metal contact surfaces 6a and 6b of two lower bar molds 2a and 2b provided with the spring 16 are those, as shown in Figure 12, cut off lengthwise and horizontally in about 2/3 section of the round bar. In this case, the metal contact surfaces 6a and 6b are below positioned in semicircular section.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are less inclined by the slidable rotation of two lower bar molds 2a and 2b.
  • the metal contact surfaces 6a and 6b of the two (2) lower bar molds are those , as shown in Figure 17, cut off in about 1/3 section of the round bar. In this case, the metal contact surfaces 6a and 6b is above positioned in semicircular section.
  • the metal contact surfaces 6a and 6b of two (2) lower bar molds 2a and 2b are more inclined by the slidale rotation of two lower bar molds 2a and 2b.
  • the two (2) lower bar molds 2 and 2b, provided with the adjoining curbed convex surfaces, constituting the lower mold 3 provided with the spring 16, are cut off lengthwise and perpendicularly, as shown in Figure 14, against the metal contact surfaces 6a and 6b and the surface 10 is formed.
  • Two (2) lower bar molds 2 and 2b are placed more closely in parallel. Thereby, the bending angle of the metal plate 8 may be made smaller. Thereby, the thickness of lower bar molds 2 and 2b may be made smaller as mentioned above.
  • the spring 16 may be attached to the alligators of the lower bar molds 2a and 2b.
  • the spring may be attached to the groove or pin, etc. provided at the lower bar molds 2a and 2b.
  • any ordinary spring may be used as the spring 16.
  • any expansible gadgets as shown in Figure 18, such as the piston 17, damper, absorber, etc., if such gadgets are capable of controlling, when bending the metal plate 8, the rotation of the lower bar molds 2a and 2b and returning the rotated lower bar molds 2a and 2b to the horizontal position.
  • the length and thickness of lower bar molds 2a and 2b and alligator may be optionally determined by the thickness and quality of the metal plate 8 to be bent, the bending angle thereof, etc.
  • the lower bar molds 2a and 2b may be satisfied, if in the range of 1 ⁇ 500 cm in length, and in the range of 0.5 ⁇ 300 cm in thickness.
  • the metal contact surfaces 6a and 6b of the lower bar molds 2a and 2b may be satisfied, if in the range of 1 x 5 cm ⁇ 300 x 00 cm in size.
  • the excellent advantage of the present invention is that the downward pressure of the upper mold 1 is properly conveyed to the metal plate by controlling the rotation of the lower bar molds 2a and 2b and the metal contact surfaces are caused not to run off the metal plate, and the bending angle (R) of the metal plate may be made acute.
  • the downward pressure of the upper mold conveyed by way of the metal plate to the groove surface of the lower mold have been reduced by halves.
  • that pressure is released by the rotation of the metal contact surfaces of the two (2) lower bar molds.
  • the product made of the metal plate bent thereby has the better outer appearance. This is the advantage of the present invention.
  • the downward pressure of the upper mold is accepted and dispersed at the entire metal contact surfaces of two lower bar molds, there is neither damage nor deterioration in the physical texture of the metal plate. There are made no cracks in the metal plate. Not only that, but the inherent physical strength is maintained.
  • the present invention even when the stroke of the upper mold does not reach the lower dead point, it is possible to bend the metal plate. Because of this, the shock by the stroke of the upper mold is mitigated. There is minimized the effect of friction cause between the groove surface of the lower mold and the metal plate by the downward pressure of the upper mold. Thus, scratches and damages are eliminated on the groove surfaces of the lower molds. This prevent the lower mold groove from being abraded and worn out and contributes to the longer life of the metal molds. The work performance of the metal mold is stabilized and may be used semi-permanently.
  • the metal contact surfaces of the two lower bar molds are automatically caused to return to the horizontal position. There is no need for restoring manually the metal contact surfaces of the two lower bar molds to the original position. Thus, the bending processes of the metal plates are remarkably improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP99973573A 1998-12-28 1999-11-30 Biegevorrichtung von metalplatte Withdrawn EP1066893A4 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP10373221A JP2000197918A (ja) 1998-12-28 1998-12-28 金属板折り曲げ装置
JP37322198 1998-12-28
JP4904799 1999-02-25
JP11049048A JP2000246341A (ja) 1999-02-25 1999-02-25 回転抑制機材付金属板折曲装置
JP4904899 1999-02-25
JP11049047A JP2000246340A (ja) 1999-02-25 1999-02-25 錘付金属板折り曲げ装置
PCT/JP1999/006702 WO2000040348A1 (fr) 1998-12-28 1999-11-30 Dispositif de pliage de feuille metallique

Publications (2)

Publication Number Publication Date
EP1066893A1 true EP1066893A1 (de) 2001-01-10
EP1066893A4 EP1066893A4 (de) 2002-09-04

Family

ID=27293499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99973573A Withdrawn EP1066893A4 (de) 1998-12-28 1999-11-30 Biegevorrichtung von metalplatte

Country Status (2)

Country Link
EP (1) EP1066893A4 (de)
WO (1) WO2000040348A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008062152A1 (en) * 2006-11-21 2008-05-29 Rolls-Royce Plc A bending tool
EP2581145A1 (de) * 2011-10-10 2013-04-17 Invacare Corporation Biegestempel- und Matrizensatz
WO2015103655A1 (de) * 2014-01-09 2015-07-16 Trumpf Maschinen Austria Gmbh & Co. Kg. Unterwerkzeug einer biegepresse mit einer biegewinkelmessvorrichtung
CN108453178A (zh) * 2017-12-27 2018-08-28 中核北方核燃料元件有限公司 一种核燃料组件压紧板弹簧折弯模具

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10111134C1 (de) * 2001-03-08 2002-07-04 Bayerische Motoren Werke Ag Verfahren zum Abkanten eines Bleches und Vorrichtung zur Durchführung des Verfahrens
RU2638465C1 (ru) * 2017-01-13 2017-12-13 Евгений Владимирович Михайлов Способ и устройство для гибки тонколистового металла
CN114850269B (zh) * 2022-05-31 2023-07-28 江苏科力西铝业有限公司 一种l型铝型材弯弧模具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0242718U (de) * 1988-09-13 1990-03-23
JPH0299222A (ja) * 1988-09-30 1990-04-11 Kobe Steel Ltd 制振鋼板のｖ曲げ加工方法およびｖ曲げ金型
JPH0314010U (de) * 1990-07-09 1991-02-13
JPH03124317A (ja) * 1989-10-11 1991-05-27 Nisshin Steel Co Ltd 複合型積層金属板の回転ｖ曲げ加工方法
GB2278795A (en) * 1993-06-12 1994-12-14 Douglas Roger Hawkey Apparatus and method for working materials
JPH10166060A (ja) * 1996-12-04 1998-06-23 Amada Metrecs Co Ltd 板材折曲げ加工機の金型

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0242718U (de) * 1988-09-13 1990-03-23
JPH0299222A (ja) * 1988-09-30 1990-04-11 Kobe Steel Ltd 制振鋼板のｖ曲げ加工方法およびｖ曲げ金型
JPH03124317A (ja) * 1989-10-11 1991-05-27 Nisshin Steel Co Ltd 複合型積層金属板の回転ｖ曲げ加工方法
JPH0314010U (de) * 1990-07-09 1991-02-13
GB2278795A (en) * 1993-06-12 1994-12-14 Douglas Roger Hawkey Apparatus and method for working materials
JPH10166060A (ja) * 1996-12-04 1998-06-23 Amada Metrecs Co Ltd 板材折曲げ加工機の金型

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11, 30 September 1998 (1998-09-30) & JP 10 166060 A (AMADA METRECS CO LTD), 23 June 1998 (1998-06-23) *
See also references of WO0040348A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008062152A1 (en) * 2006-11-21 2008-05-29 Rolls-Royce Plc A bending tool
US7980111B2 (en) 2006-11-21 2011-07-19 Rolls-Royce Plc Bending tool
EP2581145A1 (de) * 2011-10-10 2013-04-17 Invacare Corporation Biegestempel- und Matrizensatz
WO2015103655A1 (de) * 2014-01-09 2015-07-16 Trumpf Maschinen Austria Gmbh & Co. Kg. Unterwerkzeug einer biegepresse mit einer biegewinkelmessvorrichtung
CN108453178A (zh) * 2017-12-27 2018-08-28 中核北方核燃料元件有限公司 一种核燃料组件压紧板弹簧折弯模具

Also Published As

Publication number Publication date
WO2000040348A1 (fr) 2000-07-13
EP1066893A4 (de) 2002-09-04

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