EP2210686B1 - Press for hot pressing billets and the like - Google Patents
Press for hot pressing billets and the like Download PDFInfo
- Publication number
- EP2210686B1 EP2210686B1 EP20100150080 EP10150080A EP2210686B1 EP 2210686 B1 EP2210686 B1 EP 2210686B1 EP 20100150080 EP20100150080 EP 20100150080 EP 10150080 A EP10150080 A EP 10150080A EP 2210686 B1 EP2210686 B1 EP 2210686B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- punch element
- piston
- hydraulic cylinder
- driving
- 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.)
- Active
Links
- 238000007731 hot pressing Methods 0.000 title claims description 7
- 238000005242 forging Methods 0.000 claims description 6
- 238000009497 press forging Methods 0.000 claims 2
- 239000000463 material Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/027—Special design or construction with punches moving along auxiliary lateral directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/18—Drives for forging presses operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars
Definitions
- the present invention relates to a press for hot pressing billets and the like.
- the above mentioned toolings comprise one or more movable punch elements which are mounted, by resilient mounting support elements, on the bottom half-die or mold.
- the top half-die is directly fixed to the sledge or ram of the press.
- the top half-die As the press ram is downward driven, the top half-die, as it contacts the bottom half-die, presses the resilient system supporting the bottom half-die holding means and, in the meanwhile, through one or more crank levers or the like, causes all the punch elements to simultaneously penetrate into the material being pressed.
- a prior approach provides to use a driving system with corresponding hydraulic cylinders directly arranged on each punch element; however, such approach, because of the required high force and operating speed, requires to use high power driving motors, and corresponding large displacement hydraulic pumps as well as large amounts of circulating oil.
- a forging press that has the features set forth in the preamble of claim 1, is known from DE 19933998 .
- the aim of the present invention is to overcome the above mentioned problems, by providing a press for hot molding billets and the like, allowing to manage the driving of the punch elements in an adjustable time and with variable operating strokes between respective punch elements, without using large displacement hydraulic pumps.
- a main object of the invention is to provide such a press adapted to operate with large pressing forces, while facilitating the forming of the workpieces, to provide high quality end pressed products.
- Another object of the present invention is to provide such a press which, owing to its specifically designed constructional features, is very reliable and safe in operation.
- Yet another object of the present invention is to provide such a press for hot pressing or molding billets and the like, which can be easily made and which, moreover, is very competitive from a mere economic standpoint.
- the press for hot pressing billets and the like which has been generally indicated by the reference number 1, comprises a bearing framework 2, which supports the operating equipment or tooling with a bottom mold or forging die 3 which is coupled with rigid supporting elements.
- top forging die 4 is coupled to the ram or sledge 5 of the press, which is advantageously driven by hydraulic driving means.
- a plurality of movable punch elements are provided.
- the main feature of the invention is that the movable punch elements 10 comprise a punch member, indicated by the reference number 11, which is introduced to provide a forming or shaping operation on the billet 8, into the corresponding mold or die.
- a further very important feature of the invention is that two toggle levers are herein provided, and, more specifically, a first toggle lever 13, pivoted to the movable carriage 14 supporting the punch member 11, and adapted to be driven with respect to the forging die.
- the first toggle lever 13 in particular, is pivoted, at the other end portion thereof, to a fixed point of the punch bearing carriage support, coupled to the base of the bottom die bearing equipment, which is rigidly fixed to the framework 2.
- a hydraulic cylinder 20 the piston stem 21 of which is coupled to the pivot point of the levers 16 and 13 is herein provided.
- This assembly comprises the toggle levers and movable carriage and may be arranged both vertically and horizontally on its supporting base.
- inventive press may comprise any desired number of punch elements, as shown, for example, in figures 5 and 6 , which show press embodiments including four and three punch elements respectively.
- the telescopically sliding movable carriage will support the punch element or member 11 to be driven for introducing it for engaging the pivot region of the levers and cylinder.
- the pressing cylinder comprises, as is shown in figures 9 and 10 , a first piston 30 coupled to the lever pivot stem 21, thereby allowing the punch element to be easily introduced into and withdrawn from the die.
- a second piston 35 projecting from a rear flange 36 for adjusting the piston stroke is herein provided.
- the adjustment of the full stroke of the punch element is performed by driving and locating the second piston 35 in the cylinder chamber directly through the electrohydraulic system, generally indicated by the reference number 40, which also allows to electronically detect the achieved position.
- each said assembly will be an actually independent and autonomous operating arrangement.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Press Drives And Press Lines (AREA)
Description
- The present invention relates to a press for hot pressing billets and the like.
- As is known, for hot pressing articles, usually made of a brass material, mechanical or hydraulic presses which comprise toolings allowing to provide, by using a contoured pattern in the press die or molds and suitable movable punches, a desired configuration or shape are conventionally used.
- In actual practice, upon having introduced a heated material length, the pressed pieces, even including large depth borings, are achieved by the press punch assemblies, thereby achieving saving materials and a greatly reducing the press operating time.
- Typically, the above mentioned toolings comprise one or more movable punch elements which are mounted, by resilient mounting support elements, on the bottom half-die or mold.
- The top half-die, in turn, is directly fixed to the sledge or ram of the press.
- As the press ram is downward driven, the top half-die, as it contacts the bottom half-die, presses the resilient system supporting the bottom half-die holding means and, in the meanwhile, through one or more crank levers or the like, causes all the punch elements to simultaneously penetrate into the material being pressed.
- While the above operating method is satisfactory under several aspects, it, however, does not allow to individually control each punch element, both with respect to its penetrating stroke and to a possibility of properly differentiating the starting and end of stroke times.
- In order to overcome the above mentioned problem, a prior approach provides to use a driving system with corresponding hydraulic cylinders directly arranged on each punch element; however, such approach, because of the required high force and operating speed, requires to use high power driving motors, and corresponding large displacement hydraulic pumps as well as large amounts of circulating oil.
- Accordingly, because of the high inlet and outlet speed of the punch element with respect to the die, it is necessary to use large size and high cost mechanical detent elements and manual adjusting assemblies. A forging press that has the features set forth in the preamble of
claim 1, is known fromDE 19933998 . - Accordingly, the aim of the present invention is to overcome the above mentioned problems, by providing a press for hot molding billets and the like, allowing to manage the driving of the punch elements in an adjustable time and with variable operating strokes between respective punch elements, without using large displacement hydraulic pumps.
- Within the scope of the above mentioned aim, a main object of the invention is to provide such a press adapted to operate with large pressing forces, while facilitating the forming of the workpieces, to provide high quality end pressed products.
- Another object of the present invention is to provide such a press which, owing to its specifically designed constructional features, is very reliable and safe in operation.
- Yet another object of the present invention is to provide such a press for hot pressing or molding billets and the like, which can be easily made and which, moreover, is very competitive from a mere economic standpoint.
- The above aim and these and other objects, which will become apparent better, hereinafter, are achived by a press for hot processing billets and the like, according to the invention, that has the features of
claim 1. - Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of a press for hot pressing billets and the like, which is illustrated, by way of an indicative, but not limitative, example in the accompanying drawings, where:
-
Figure 1 is a schematic perspective view showing the press according to the present invention; -
Figure 2 is a front elevation view of the press according to the present invention; -
Figure 3 is a further side elevation view of the press according to the present invention; -
Figure 4 shows a top plan view of the press according to the present invention; -
Figure 5 shows a further cross-sectional view substantially taken along the section line V-V offigure 2 ; -
Figure 6 shows a further cross-sectional view, substantially taken along the section line V-V offigure 2 , of the inventive press including three punch elements; -
Figure 7 is a further cross-sectional view showing the punch elements in a lowered or introduced position thereof; -
Figure 8 is a schematic view showing the punch element at an opening position thereof; and -
Figures 9 and 10 show a position transducer for controlling the operating strokes of hydraulic pistons controlling the punch elements. - With reference to the number references of the above mentioned figures, the press for hot pressing billets and the like according to the invention, which has been generally indicated by the
reference number 1, comprises a bearingframework 2, which supports the operating equipment or tooling with a bottom mold or forgingdie 3 which is coupled with rigid supporting elements. - More specifically, the
top forging die 4 is coupled to the ram orsledge 5 of the press, which is advantageously driven by hydraulic driving means. - At the lower mold or forging die of the press, a plurality of movable punch elements, generally indicated by the
reference number 10 are provided. - The main feature of the invention is that the
movable punch elements 10 comprise a punch member, indicated by thereference number 11, which is introduced to provide a forming or shaping operation on thebillet 8, into the corresponding mold or die. - A further very important feature of the invention is that two toggle levers are herein provided, and, more specifically, a
first toggle lever 13, pivoted to themovable carriage 14 supporting thepunch member 11, and adapted to be driven with respect to the forging die. - The first toggle lever 13, in particular, is pivoted, at the other end portion thereof, to a fixed point of the punch bearing carriage support, coupled to the base of the bottom die bearing equipment, which is rigidly fixed to the
framework 2. - To properly drive the
movable carriage 14, ahydraulic cylinder 20, thepiston stem 21 of which is coupled to the pivot point of thelevers - This assembly comprises the toggle levers and movable carriage and may be arranged both vertically and horizontally on its supporting base.
- In this connection it should be apparent that the inventive press may comprise any desired number of punch elements, as shown, for example, in
figures 5 and6 , which show press embodiments including four and three punch elements respectively. - In operation, the telescopically sliding movable carriage will support the punch element or
member 11 to be driven for introducing it for engaging the pivot region of the levers and cylinder. - The pressing cylinder comprises, as is shown in
figures 9 and 10 , afirst piston 30 coupled to thelever pivot stem 21, thereby allowing the punch element to be easily introduced into and withdrawn from the die. - Moreover, a
second piston 35 projecting from arear flange 36 for adjusting the piston stroke is herein provided. - More specifically, the adjustment of the full stroke of the punch element is performed by driving and locating the
second piston 35 in the cylinder chamber directly through the electrohydraulic system, generally indicated by thereference number 40, which also allows to electronically detect the achieved position. - If the press equipment or tooling comprises two or more punch bearing assembly, then each said assembly will be an actually independent and autonomous operating arrangement.
- Moreover, it is herein possible to manage or control in a separate manner the operation time, to facilitate the material extruding operation, while facilitating its displacement to points which could not be easily reached and to prevent undesirable urging or pressing forces from being applied to the other punch elements.
- From the above disclosure it should be apparent that the invention fully achieves the intended aim and objects.
- In particular, the fact is to be pointed out that the provision of a toggle lever system allows to greatly reduce the driving power, since the toggle arrangement provides the possibility of gradually multiplying the applied pressing force, while reducing the linear displacement speed or rate.
- Thus, the forming of the workpiece will be greatly facilitated, since with a smaller penetration speed of the punch element into the material, the required effort or force will be correspondingly less.
- Moreover, with the herein provided toggle lever system, as the linear driving speed or rate decreases, the penetrating force will correspondingly increase.
- Thus, by suitably designing the size of the toggle levers, it is possible to achieve very high operating forces with small driving pressing efforts.
- Thus, as stated, the invention fully achieves the intended aim and objects.
- In particular, the fact is to be pointed out that the use of a mixed hydraulic and mechanical system, including the toggle lever arrangement and the hydraulic cylinder, allows to greatly improve the press operation, and to greatly reduce the required power.
- The invention, as disclosed, is susceptible to several modifications and variations, all of which will come within the scope of the invention, as defined in the claims.
Claims (5)
- A press for hot pressing billets and the like, said press (1) comprising: a bottom press-forging die (3); a top forging-die (4) associated with the sledge (5) of said press, on said bottom forging die (3) being provided at least a movable punch element (10) for forming the workpiece (8); driving means for driving said movable punch element (10), said driving means including two toggle levers (13, 16) operating between said movable punch element (10) and a fixed point, characterized in that it further comprises a hydraulic cylinder (20) operating at a pivot point of said toggle levers (13, 16) for driving said movable punch element (10), and in that said hydraulic cylinder (20) comprises a first hydraulic cylinder piston (30) coupled to a piston stem (21) that operates at said pivot point and a second piston (35) projecting from a rear flange (36) of said hydraulic cylinder (20) for adjusting the operating stroke of said punch element (10); said bottom
press-forging die (3) being rigidly coupled to the base of the equipment and to a basic frame (2) through resilient supporting elements. - A press, according to claim 1, characterized in that it comprises a movable press carriage (14) supporting, at an end portion thereof, at least a said punch element (10) and, at the other end portion thereof, being coupled to one (13) of said toggle levers
- A press, according to claim 1, characterized in that it comprises a plurality of mutually independently driven punch elements (10).
- A press, according to claim 1, characterized in that the overall stroke of said movable punch element (10) is adjusted by driving and arranging the second, rear piston (35) inside the hydraulic cylinder chamber (20).
- A press, according to claims 1 or 4, characterized in that it comprises an electrohydraulic actuator (40) adapted to directly drive and locate said second piston (35) in the chamber of said cylinder (20) for the adjustment of the full stroke of said movable punch element (10) and to operate as an absolute position transducer for detecting the achieved position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2009A000056A IT1392795B1 (en) | 2009-01-21 | 2009-01-21 | PRESS FOR HOT MOLDING OF BILLETS AND THE LIKE. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2210686A1 EP2210686A1 (en) | 2010-07-28 |
EP2210686A8 EP2210686A8 (en) | 2010-12-22 |
EP2210686B1 true EP2210686B1 (en) | 2012-12-26 |
Family
ID=41376398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100150080 Active EP2210686B1 (en) | 2009-01-21 | 2010-01-05 | Press for hot pressing billets and the like |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2210686B1 (en) |
ES (1) | ES2420586T3 (en) |
IT (1) | IT1392795B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9770841B2 (en) | 2014-05-30 | 2017-09-26 | Saint-Gobain Ceramics & Plastics, Inc. | Hot press and method of using |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900012969A1 (en) | 2019-07-26 | 2021-01-26 | Mecolpress S P A | EQUIPMENT FOR MATERIALS MOLDING. |
WO2023031767A1 (en) * | 2021-08-30 | 2023-03-09 | Thorside S.R.L. | Press for hot forging metal components |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES397281A1 (en) * | 1971-05-03 | 1975-03-01 | Mecolpress Di Giulio Molinari | Improvements in the construction of presses for hot stamping of brass. (Machine-translation by Google Translate, not legally binding) |
DE19933998A1 (en) * | 1999-07-20 | 2001-01-25 | Skf Gmbh | Press forming process for formed parts uses blanks with smaller volume than mold interior, and die to press recesses into part to fill mold interior |
DE102006023721B3 (en) * | 2006-05-19 | 2007-08-02 | Wepuko Hydraulik Gmbh | Forge has moving guide beam with side-mounted force pickups driving contra-action |
-
2009
- 2009-01-21 IT ITMI2009A000056A patent/IT1392795B1/en active
-
2010
- 2010-01-05 EP EP20100150080 patent/EP2210686B1/en active Active
- 2010-01-05 ES ES10150080T patent/ES2420586T3/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9770841B2 (en) | 2014-05-30 | 2017-09-26 | Saint-Gobain Ceramics & Plastics, Inc. | Hot press and method of using |
Also Published As
Publication number | Publication date |
---|---|
EP2210686A8 (en) | 2010-12-22 |
ES2420586T3 (en) | 2013-08-26 |
ITMI20090056A1 (en) | 2010-07-22 |
IT1392795B1 (en) | 2012-03-23 |
EP2210686A1 (en) | 2010-07-28 |
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