EP0353231B1 - Process and apparatus for forging one piece track roller rim - Google Patents
Process and apparatus for forging one piece track roller rim Download PDFInfo
- Publication number
- EP0353231B1 EP0353231B1 EP19880902665 EP88902665A EP0353231B1 EP 0353231 B1 EP0353231 B1 EP 0353231B1 EP 19880902665 EP19880902665 EP 19880902665 EP 88902665 A EP88902665 A EP 88902665A EP 0353231 B1 EP0353231 B1 EP 0353231B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shells
- cavity
- frame
- punch
- closed
- 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.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/025—Dies with parts moving along auxiliary lateral directions
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
- B21K23/04—Making other articles flanged articles
Definitions
- the present invention relates to a process and apparatus for the forging of a hollow metal part, more particularly of a track roller rim for a track-type vehicle.
- the track roller rims of track-type vehicles generally consist of two complementary parts welded coaxially to each other.
- the present process used to produce the two piece track rollers is time consuming and costly. In fact, it requires that the ends of the parts to be attached to each other be machined prior to welding. Also, it necessitates considerable precaution to ensure a suitable alignment of the parts to be butt-welded to avoid the production of defective rollers.
- JP-A-5841643 discloses a method and an apparatus for forging a roller.
- metallic molds are used which define, when closed, a cavity having one end closed by a lower punch. The molds can be locked into the closed position.
- An upper cylindrical punch is provided to force the material of a metal blank located in the cavity against the inner surface of the cavity. To remove the forged roller from the cavity the cylindrical upper punch is removed and the molds are moved apart.
- the present invention aims at overcoming the various drawbacks discussed above, and it is therefore an object of the present invention to provide a process and apparatus for the forging of a hollow metal part, more particularly a one piece track roller rim for a track-type vehicle, which process is set forth in claim 1.
- the invention provides for the following steps: placing a hot metal billet on a supporting block; closing a die having two complementary half-shells which, when brought together in a closed position, define forging cavity having a lower end closed by the supporting block, an open upper end, and an inner shape of which corresponds to the outer surface of the part to be produced; moving a hoop around the two half-shells so as to interlock them; moving a cylindrical punch into the forging cavity to form in the billet an axial opening with a bottom portion above the lower end of the extrusion cavity and to force the material of the billet against the inner surface of said extrusion cavity; removing the cylindrical punch from the extruded part; unlocking the two half-shells; moving the two half-shells apart; removing the extruded part resting on the supporting block; and punching out the bottom portion of the axial cavity in the extruded part.
- the track rollers and/or other hollow parts can now be produced from a single billet using a single die, thereby reducing the fabrication costs, improving the production rates and making the work easier for the personnel.
- the two half-shells are brought together and are moved apart by being moved in opposite directions along a horizontal straight path; and the hoop that locks the two half-shells closed is removed therefrom by being moved vertically.
- the hoop may be advantageously disposed around the two half-shells while the punch is being lowered, and removed therefrom while said punch is being raised.
- the present invention also relates to an apparatus as set forth in claim 5. Further, said apparatus comprises: a supporting block; a die having at least two complementary shells disposed on either side of the supporting block and movable in opposite directions from an open position, in which they are spaced apart, to a closed position in which they engage each other, said shells when in their closed position defining a cavity having one end closed by the supporting block, an open opposite end, and an inner shape which corresponds to the outer surface of the part to be produced; control means for moving the two half-shells in opposite directions along a straight path; a frame movable toward the supporting block from an inoperative position to a fully extended position; a hoop supported from the frame and so shaped as to surround the two half-shells in their closed position to lock them in the closed position when the frame is in an intermediate locking position between its extreme positions; a cylindrical punch mounted on the frame so as to project into the forging cavity when the frame is between its intermediate locking position and its fully extended position; and means for moving the frame between its inoperative and fully
- a cylindrical supporting block 1 is shown resting on a horizontal baseplate 2 which is integral with a fixed frame 3.
- a die 4 consists of two complementary half-shells 4a, 4b which are disposed on either side of the supporting block 1.
- Control means 5a, 5b are provided to move the half-shells 4a, 4b in opposite directions from an open position (as shown by Figures 1 and 7) in which they are apart to a closed position (as shown by Figures 2 to 6 and 8) in which they engage each other and enclose the supporting block 1.
- a frame 6 is movable vertically above said supporting block from an uppermost position (as shown by Figures 1, 2, 6 and 7).
- a rigid hoop 7 extending below the frame 6 is configured for closely surrounding the two half-shells 4a, 4b in their closed position, for solidly locking them in the closed position when the frame 6 is in an intermediate position as shown in Figures 3 to 5.
- a cylindrical punch 8 provided in the lower end of a column 9 projects vertically from the lower face of the frame 6.
- Means 10 is provided to move the frame 6 between its uppermost and lowermost positions, such means being for example hydraulic jacks.
- the half-shells 4a, 4b are movable in opposite directions between two straight guiding rails 11 (as shown on Figures 8 and 9) which are secured by means of screws 12 to the frame 3, on either side of the supporting block 1.
- the half-shells are respectively formed with two side brackets 13a, 13b projecting under the guiding rails 11 which keep the half-shells on the frame 3.
- the brackets are perpendicular to the half-shells on the frame 3.
- the brackets are perpendicular to the half-shells as is shown in Figure 8.
- the half-shells 4a, 4b In their closed position, the half-shells 4a, 4b have outer surfaces 22a,22b in the form of a truncated cone and defining inner surfaces forming and/or forging cavity 14 having its lower end closed by the supporting block 1 and its upper end in communication with a cylindrical prechamber 15 which is open at its upper portion.
- the forming cavity 14 and prechamber 15 extend coaxially with the punch 8, the inner surfaces of forming cavity 14 further having shape corresponding to the outer surface of the part to be produced.
- the control means 5a, 5b consist of two coaxial jacks having their cylinders 16a, 16b attached to the frame 3 and their piston rods 17a, 17b connected to the half-shells 4a, 4b.
- said jacks are equidistant from the guiding rails 11 and extend perpendicular to engage surfaces 18a, 18b of the half-shells.
- the hoop 7 is fastened to the lower end of vertical rods 19 slidably mounted on the frame 6.
- Such rods of which only one is visible in the drawings, are distributed uniformly along the side wall of an imaginably cylinder, the axis of which is coincident with the axis of the hoop.
- the rods 19 are loosely secured to frame 6 by nuts 20 that are screwed on to their upper ends.
- the inner surface 21 of the hoop 7 has a truncated shape corresponding to the truncated cone shape provided by the outer surfaces 22a, 22b of the half-shells 4 a, 4b, when the half-shells are in their closed position.
- the punch 8 in turn, is formed at its upper end with a cylindrically enlarged portion 23 which cooperates with the side surface of the prechamber 15 when the half-shells 4a,4b are in their closed positions to close the upper end of the forming cavity 14 when the frame 6 is in its lowermost position.
- Resilient members 24 are further interposed between the frame 6 and the hoop 7 so as to be compressed when the frame is between its intermediate locking position and its lowermost position.
- the resilient members 24 are formed by Belleville spring washers disposed in vertical tubes 25, 26 which are mounted in a telescopic manner between the hoop 7 and the frame 6.
- the telescopic tubes 25, 26 of which only one set is represented in the drawings are angularly equidistant from one another as well as from the rods 19 supporting the hoop.
- a cylindrical steel billet 27 is placed on the supporting block 1, as shown in Figure 1.
- the billet used is slightly larger in volume than the volume of the track roller rim to be produced. It is heated to a temperature in the order of 1200 o C.
- the jacks 5a, 5b are then actuated to move the half-shells 4a, 4b into engagement with each other, as illustrated on Figure 2.
- the billet 27 then extends into the forming cavity 14 and is slightly projecting into the prechamber 15.
- control means 10 is actuated to lower the frame 6. While the latter is moving from its uppermost position to its intermediate locking position as shown on Figure 3, the hoop 7 moves down around the half-shells 4a, 4b until its inner surface 21 comes into intimate contact with the outer surfaces 22a, 22b thereof solidly locking the half-shells into their engaged position.
- the punch 8 moves into the prechamber 15 at this time.
- the Belleville spring washers 24 compress, maintaining the locking of the half-shells 4a, 4b by applying pressure on the hoop 7.
- the punch 8 penetrates into the billet 27 forcing the metal outwardly against the inner surface of the forming cavity 14 as frame 6 continues to move downward.
- the frame 6 reaches its lowermost position as shown in Figure 4, the punch 8 will have formed an axial opening 29 with a relatively thin bottom portion 30 in the billet 27.
- the enlarged portion 23 is obstructing the upper end of the extrusion cavity 14 when the punch reaches this position.
- the material of the billet is rearranged, taking the shape of the inner surface of the forming cavity 14 while forming the axial opening 29.
- the means 10 is now actuated reversibly so as to raise the frame 6. While the latter is moving away from its fully extended position, the punch 8 moves out of the cavity 29 of the forged part 31 made from the billet 27. It moves to the position represented in Figure 5, without the hoop 7 being driven upwardly. It should be noted here that the upward movement of the punch 8 from the cavity 29 is assisted by the Belleville spring washers 24.
- the jacks 5a, 5b are actuated to bring the half-shells 4a, 4b to their open position as shown in Figure 7 and thus allows removal of the extruded part 31 from the extrusion cavity 14.
- the extruded part 31 is finally transferred to a punching station to cut out the bottom portion 30 of the cavity 29 in a well known manner.
- the track roller needs only to be submitted to a conventional finish machining operation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
- The present invention relates to a process and apparatus for the forging of a hollow metal part, more particularly of a track roller rim for a track-type vehicle.
- The track roller rims of track-type vehicles generally consist of two complementary parts welded coaxially to each other. However, the present process used to produce the two piece track rollers is time consuming and costly. In fact, it requires that the ends of the parts to be attached to each other be machined prior to welding. Also, it necessitates considerable precaution to ensure a suitable alignment of the parts to be butt-welded to avoid the production of defective rollers.
- To solve such problems there have been attempts to produce one piece track roller rims from a single metal billet. Unfortunately, the solution proposed, which consisted in transforming the billet step by step using several interchangeable dies, is not fully satisfactory as it involves high investments and further requires fairly numerous and difficult handling operations to be performed by the personnel using such processes.
- JP-A-5841643 discloses a method and an apparatus for forging a roller. For this purpose, metallic molds are used which define, when closed, a cavity having one end closed by a lower punch. The molds can be locked into the closed position. An upper cylindrical punch is provided to force the material of a metal blank located in the cavity against the inner surface of the cavity. To remove the forged roller from the cavity the cylindrical upper punch is removed and the molds are moved apart.
- The present invention aims at overcoming the various drawbacks discussed above, and it is therefore an object of the present invention to provide a process and apparatus for the forging of a hollow metal part, more particularly a one piece track roller rim for a track-type vehicle, which process is set forth in
claim 1. Further, the invention provides for the following steps: placing a hot metal billet on a supporting block; closing a die having two complementary half-shells which, when brought together in a closed position, define forging cavity having a lower end closed by the supporting block, an open upper end, and an inner shape of which corresponds to the outer surface of the part to be produced; moving a hoop around the two half-shells so as to interlock them; moving a cylindrical punch into the forging cavity to form in the billet an axial opening with a bottom portion above the lower end of the extrusion cavity and to force the material of the billet against the inner surface of said extrusion cavity; removing the cylindrical punch from the extruded part; unlocking the two half-shells; moving the two half-shells apart; removing the extruded part resting on the supporting block; and punching out the bottom portion of the axial cavity in the extruded part. - With this process, the track rollers and/or other hollow parts can now be produced from a single billet using a single die, thereby reducing the fabrication costs, improving the production rates and making the work easier for the personnel.
- In a preferred embodiment of the process, the two half-shells are brought together and are moved apart by being moved in opposite directions along a horizontal straight path; and the hoop that locks the two half-shells closed is removed therefrom by being moved vertically.
- In order to further increase the production rates, the hoop may be advantageously disposed around the two half-shells while the punch is being lowered, and removed therefrom while said punch is being raised.
- The present invention also relates to an apparatus as set forth in
claim 5. Further, said apparatus comprises: a supporting block; a die having at least two complementary shells disposed on either side of the supporting block and movable in opposite directions from an open position, in which they are spaced apart, to a closed position in which they engage each other, said shells when in their closed position defining a cavity having one end closed by the supporting block, an open opposite end, and an inner shape which corresponds to the outer surface of the part to be produced; control means for moving the two half-shells in opposite directions along a straight path; a frame movable toward the supporting block from an inoperative position to a fully extended position; a hoop supported from the frame and so shaped as to surround the two half-shells in their closed position to lock them in the closed position when the frame is in an intermediate locking position between its extreme positions; a cylindrical punch mounted on the frame so as to project into the forging cavity when the frame is between its intermediate locking position and its fully extended position; and means for moving the frame between its inoperative and fully extended positions. - The above as well as other features and objects of the machine according to the present invention will become apparent from the following description provided by way of example with references to the accompanying drawings.
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- Figure 1 is a schematic sectional and cutaway view of an apparatus according to the invention, with the components of said apparatus shown in their relevant position during the first step of the forming process;
- Figures 2 to 7 illustrate further steps of the forming process;
- Figure 8 is a schematic scaled down sectional view taken along line VIII-VIII of Figure 5; and
- Figure 9 is a schematic scaled down sectional view taken along line IX-IX of Figure 5.
- Referring now to the drawings, a cylindrical supporting
block 1 is shown resting on ahorizontal baseplate 2 which is integral with afixed frame 3. A die 4 consists of two complementary half-shells block 1. Control means 5a, 5b are provided to move the half-shells block 1. Aframe 6 is movable vertically above said supporting block from an uppermost position (as shown by Figures 1, 2, 6 and 7). Arigid hoop 7 extending below theframe 6 is configured for closely surrounding the two half-shells frame 6 is in an intermediate position as shown in Figures 3 to 5. Acylindrical punch 8 provided in the lower end of acolumn 9 projects vertically from the lower face of theframe 6.Means 10 is provided to move theframe 6 between its uppermost and lowermost positions, such means being for example hydraulic jacks. - The half-
shells screws 12 to theframe 3, on either side of the supportingblock 1. The half-shells are respectively formed with twoside brackets rails 11 which keep the half-shells on theframe 3. The brackets are perpendicular to the half-shells on theframe 3. The brackets are perpendicular to the half-shells as is shown in Figure 8. - In their closed position, the half-
shells outer surfaces cavity 14 having its lower end closed by the supportingblock 1 and its upper end in communication with acylindrical prechamber 15 which is open at its upper portion. - The forming
cavity 14 and prechamber 15 extend coaxially with thepunch 8, the inner surfaces of formingcavity 14 further having shape corresponding to the outer surface of the part to be produced. - The control means 5a, 5b consist of two coaxial jacks having their
cylinders frame 3 and theirpiston rods shells rails 11 and extend perpendicular to engagesurfaces - The
hoop 7 is fastened to the lower end ofvertical rods 19 slidably mounted on theframe 6. Such rods, of which only one is visible in the drawings, are distributed uniformly along the side wall of an imaginably cylinder, the axis of which is coincident with the axis of the hoop. Therods 19 are loosely secured to frame 6 bynuts 20 that are screwed on to their upper ends. - To ensure proper locking of the half-shells, the
inner surface 21 of thehoop 7 has a truncated shape corresponding to the truncated cone shape provided by theouter surfaces shells - The
punch 8, in turn, is formed at its upper end with a cylindrically enlargedportion 23 which cooperates with the side surface of theprechamber 15 when the half-shells cavity 14 when theframe 6 is in its lowermost position. -
Resilient members 24 are further interposed between theframe 6 and thehoop 7 so as to be compressed when the frame is between its intermediate locking position and its lowermost position. In the example illustrated, theresilient members 24 are formed by Belleville spring washers disposed invertical tubes hoop 7 and theframe 6. It should be noted that thetelescopic tubes rods 19 supporting the hoop. Although the forging apparatus is shown and described in a generally vertical arrangement, it is to be understood that other orientations would be feasible. - The operation of the apparatus according to the invention is described hereafter, assuming that the half-
shells frame 6 is in its uppermost position. - Firstly, a
cylindrical steel billet 27 is placed on the supportingblock 1, as shown in Figure 1. The billet used is slightly larger in volume than the volume of the track roller rim to be produced. It is heated to a temperature in the order of 1200oC. - The
jacks shells billet 27 then extends into the formingcavity 14 and is slightly projecting into theprechamber 15. - Next, the control means 10 is actuated to lower the
frame 6. While the latter is moving from its uppermost position to its intermediate locking position as shown on Figure 3, thehoop 7 moves down around the half-shells inner surface 21 comes into intimate contact with theouter surfaces punch 8 moves into the prechamber 15 at this time. - As the
frame 6 is moving from its intermediate position to its lowermost or fully extended position as shown on Figure 4, the Bellevillespring washers 24 compress, maintaining the locking of the half-shells hoop 7. - The
punch 8 penetrates into thebillet 27 forcing the metal outwardly against the inner surface of the formingcavity 14 asframe 6 continues to move downward. When theframe 6 reaches its lowermost position as shown in Figure 4, thepunch 8 will have formed anaxial opening 29 with a relativelythin bottom portion 30 in thebillet 27. Theenlarged portion 23 is obstructing the upper end of theextrusion cavity 14 when the punch reaches this position. As thepunch 8 is forced into the billet, the material of the billet is rearranged, taking the shape of the inner surface of the formingcavity 14 while forming theaxial opening 29. - The means 10 is now actuated reversibly so as to raise the
frame 6. While the latter is moving away from its fully extended position, thepunch 8 moves out of thecavity 29 of the forgedpart 31 made from thebillet 27. It moves to the position represented in Figure 5, without thehoop 7 being driven upwardly. It should be noted here that the upward movement of thepunch 8 from thecavity 29 is assisted by theBelleville spring washers 24. - Then, as the
frame 6 continues moving from the position shown in Figure 5 to the position shown in Figure 6, it drives with it thehoop 7, thus unlocking the half-shells - Thereafter, the
jacks shells extruded part 31 from theextrusion cavity 14. - The
extruded part 31 is finally transferred to a punching station to cut out thebottom portion 30 of thecavity 29 in a well known manner. - Then, the track roller needs only to be submitted to a conventional finish machining operation.
- The above described production cycle will of course be repeated to produce other track rollers.
- It stands out clearly from the foregoing that with the process and apparatus according to the present invention, one piece track roller rims can be produced more easily and quickly at a lower cost than with the processes and machines of the prior art.
- Although the apparatus is described as producing track rollers for track-type vehicles, it may be used without any limitations for producing other hollow metal parts.
Claims (12)
- A process for forging a one piece track roller rim from a billet of material, comprising the steps of:
placing the billet (27) against a supporting block (1) ;
closing a die (4) having at least two complementary shells (4a, 4b) which, when closed, define a cavity (14) and a cylindrical prechamber (15) extending said cavity, said cavity having one end closed by the supporting block (1) , an open opposite end at the side of the prechamber, and an inner surface with a shape corresponding to the outer surface of the track roller rim to be formed in the cavity;
locking the shells (4a,4b) in their closed position;
moving a cylindrical punch (8) into the cavity (14) to form an axial opening (29) in the billet (27) and to force the material against the inner surface of the cavity and form the track roller rim, said punch (8) having at one end a cylindrical enlarged portion (23) which cooperates with the side surface of the prechamber (15) to close the open end of the extrusion cavity (14) when a frame (6) carrying said punch (8) is at its lower most position;
removing the cylindrical punch (8) from the axial opening (29);
unlocking the shells (4a, 4b);
moving the shells (4a, 4b) apart;
and removing the formed track roller rim (31). - The process according to claim 1, wherein closing and opening of the shells (4a, 4b) is done by moving them in opposite directions along a straight path.
- The process according to claim 1, wherein the hoop (7) locking the shells (4a, 4b) closed is moved in a straight path into and out of surrounding engagement with the shells.
- The process according to claim 1 or 3, wherein the hoop (7) surrounds the two half-shells (4a, 4b) locking them in their closed position while the punch (8) is being moved into the cavity, and it is removed as said punch is being moved out of said cavity.
- An apparatus for forming a one piece hollow part from a billet of material comprising:
a supporting block (1);
a die (4) having at least two complementary shells (4a, 4b) adjacent the supporting block (1) and movable between an open position in which they are spaced apart and a closed position in which they engage each other, said shells when in their closed position defining a cavity (14) having one end closed by the supporting block (1), an open opposite end, and an inner surface having a shape corresponding to the outer surface of the part to be formed;
control means (5a, 5b) for moving the shells (4a, 4b) between said positions along a straight path;
a frame (6) mounted for movement with respect to the supporting block (1) and in a direction generally perpendicular to said path from an inoperative position to a moved position;
a rigid hoop (7) supported on the frame (6) and configured to surround the shells (4a, 4b) in their closed position locking them in said closed position when the frame (6) is at a locking position intermediate its inoperative and moved positions;
a cylindrical punch (8) mounted on the frame (6) to progressively project into the cavity (14) as the frame (6) moves from its intermediate locking position to its moved position; means (10) for moving the frame (6) between its said positions; and wherein the cavity (14) is extended by a cylindrical prechamber (15) defined by said shells when closed, the punch (8) being formed at one end with a cylindrical enlarged portion (23) which cooperates with the side surface of the prechamber (15) to close the open end of the cavity (14) when the frame (6) is at its lower most position. - The apparatus according to claim 5, wherein the shells (4a, 4b) are slidably mounted in parallel guiding rails (11).
- The apparatus according to claim 5, wherein the control means (5a, 5b) of the shells (4a, 4b) consist of two coaxial jacks.
- The apparatus according to claim 5, wherein the outer surfaces (22a, 22b) of the shells (4a, 4b) and the inner surface (21) of the hoop (7) are truncated in shape and have the same dimensions when the shells are in their closed positions.
- The apparatus according to claim 5, wherein the hoop (7) is fastened to the end of vertical rods (19) slidably mounted on the frame (6).
- The apparatus according to claim 5, wherein resilient members (24) are interposed between the frame (6) and the hoop (7), so as to be compressed when the frame (6) is between its intermediate locking position and its fully extended position.
- The apparatus according to claim 10, wherein the resilient members (24) are disposed in vertical tubes (25, 26) mounted in a telescopic manner between the hoop (7) and the frame (6).
- The apparatus according to claim 5 wherein the shells (4a, 4b) are two complementary half-shells.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8703438A FR2612095B1 (en) | 1987-03-13 | 1987-03-13 | PROCESS AND MACHINE FOR THE MANUFACTURE BY EXTRUSION OF A HOLLOW METAL PART, PARTICULARLY A ROLLER ROLLER FOR TRACKED MACHINE |
FR8703438 | 1987-03-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0353231A4 EP0353231A4 (en) | 1990-01-08 |
EP0353231A1 EP0353231A1 (en) | 1990-02-07 |
EP0353231B1 true EP0353231B1 (en) | 1993-06-30 |
Family
ID=9348922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880902665 Expired - Lifetime EP0353231B1 (en) | 1987-03-13 | 1988-02-22 | Process and apparatus for forging one piece track roller rim |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0353231B1 (en) |
DE (1) | DE3882137T2 (en) |
FR (1) | FR2612095B1 (en) |
WO (1) | WO1988006931A1 (en) |
Cited By (1)
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CN114012017A (en) * | 2022-01-07 | 2022-02-08 | 宁波润程智能科技有限公司 | Forging die for forming hub |
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WO2012088490A1 (en) * | 2010-12-23 | 2012-06-28 | Orchid Orthopedics Solutions, Llc | Orthopedic implant and method of making same |
CN102632184B (en) * | 2012-04-20 | 2014-10-08 | 上海运良企业发展有限公司 | Method for forging roller for crawler excavator |
CN103056602A (en) * | 2012-09-11 | 2013-04-24 | 昌利锻造有限公司 | Manufacturing method for rolling wheel for crawler excavator |
CN105798218A (en) * | 2014-12-29 | 2016-07-27 | 苏州宝业锻造有限公司 | Oil tube head loose tooling with boss |
CN105855396B (en) * | 2016-05-25 | 2017-12-05 | 皖西学院 | A kind of Tapered Cup high pressure torsion mould |
BE1029728B1 (en) * | 2021-09-03 | 2023-04-11 | Safran Aero Boosters | PROCESS FOR MANUFACTURING A TURBOMACHINE BLADE |
CN114453583B (en) * | 2022-04-13 | 2022-06-21 | 合肥工业大学 | High-pressure torsion forming die for conical shaped charge liner |
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US2744426A (en) * | 1949-12-28 | 1956-05-08 | Lyon George Albert | Apparatus for coining metal parts |
DE2310983A1 (en) * | 1973-03-06 | 1974-09-12 | Rheinstahl Ag | Forging profiled rolls - billet forged first to preform then to final shape |
DE2345528A1 (en) * | 1973-09-10 | 1975-03-20 | Schirmer & Plate | HYDRAULIC HORIZONTAL FORGING MACHINE |
US4294101A (en) * | 1979-01-12 | 1981-10-13 | Diemer Donald J | Method of making single or double flanged track tractor roller for off-highway equipment |
JPS57168742A (en) * | 1981-04-09 | 1982-10-18 | Fukui Kikai Kk | Forging press |
JPS5841643A (en) * | 1981-09-05 | 1983-03-10 | Kawasaki Yukou Kk | Closed-forging method |
GB2107231B (en) * | 1981-10-08 | 1985-06-12 | Gkn Forgings Ltd | Forging press |
SU1106571A1 (en) * | 1982-07-05 | 1984-08-07 | Предприятие П/Я В-2725 | Device for stamping components of lead bullet type |
DE3343623A1 (en) * | 1983-12-02 | 1985-06-13 | Thyssen Industrie AG Schmiedetechnik/Bergbautechnik, 4100 Duisburg | FORGING PRESS AND CONTROL FOR THIS |
JPH04112343A (en) * | 1990-09-03 | 1992-04-14 | Nec Corp | Abnormality supervisory unit for function decentralized system |
-
1987
- 1987-03-13 FR FR8703438A patent/FR2612095B1/en not_active Expired - Lifetime
-
1988
- 1988-02-22 DE DE19883882137 patent/DE3882137T2/en not_active Expired - Lifetime
- 1988-02-22 WO PCT/US1988/000484 patent/WO1988006931A1/en active IP Right Grant
- 1988-02-22 EP EP19880902665 patent/EP0353231B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114012017A (en) * | 2022-01-07 | 2022-02-08 | 宁波润程智能科技有限公司 | Forging die for forming hub |
Also Published As
Publication number | Publication date |
---|---|
FR2612095B1 (en) | 1994-05-13 |
EP0353231A4 (en) | 1990-01-08 |
WO1988006931A1 (en) | 1988-09-22 |
DE3882137T2 (en) | 1994-02-10 |
DE3882137D1 (en) | 1993-08-05 |
FR2612095A1 (en) | 1988-09-16 |
EP0353231A1 (en) | 1990-02-07 |
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