Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J3/00—Lubricating during forging or pressing
• • 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
  • B21J13/08—Accessories for handling work or tools
  • B21J13/10—Manipulators
• • 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
  • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
  • B21K27/02—Feeding devices for rods, wire, or strips
  • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps

Definitions

• the subject of the present invention is an improved automatic installation for the transfer and forging of any metal parts to the press.
• Robotized installations have already been proposed enabling automatic production of parts by deformation under a press, the parts being automatically transferred to the press and automatically handled between the upper and lower dies of the press.
• These facilities generally included a forging press equipped with a plurality of die bodies, a robot provided with a arm for feeding a piece or a blank to the press, and two robots working "in mirror” respectively disposed opposite two opposite sides of the press and each provided with a workpiece transfer arm.
• the present invention aims to remedy in particular the above drawbacks by proposing an improved robotic installation having all the qualities required with regard to productivity and flexibility of operation regardless of the volume of the parts to be forged and manufactured .
• the subject of the invention is an improved automatic installation for transferring and forging any metal parts, essentially comprising a forging press equipped with a plurality of die-forging members, at least one robot provided with an arm brought a piece or a draft to the press and two opposing robots arranged respectively in manhole from two opposite sides of the press and each provided with a workpiece transfer arm, this installation being characterized in that the transfer arm of each of the two opposite robots is equipped with a plurality of workpiece grippers and a plurality of spraying booms for the matrixing members.
• each aforementioned transfer arm is equipped with as many gripping members as the press comprises forging members.
• the spraying ramps are interposed between the gripping members.
• the spray bars are mounted on each transfer arm so as to be interposed between two adjacent stamping members of the press during the advance of the transfer arms for gripping the rooms.
• the press comprises four successive bodies or stamping stations, the first of which on which the piece is brought possibly has means, such as an imprint of a particular shape, to form on the piece a burr allowing its gripping. by the gripping members, while the last member or stamping station deburring the part which is evacuated through said station on any inclined plane.
• the two aforementioned opposite robots are each pivotally mounted and in a locking mode on a base or the like.
• the installation according to this invention is controlled by a digital control associated with a programmable automaton, in particular to allow work in synchronization of the transfer arms of the two opposite robots and of the robot allowing the supply of a piece or a blank to the press.
• FIG. 1 is a partial schematic view from above of an installation according to this invention, the press slide is not shown;
• - Figure 2 is a schematic view in elevation of the installation according to arrow II of Figure 1;
• FIG. 3 is a partial side view of the installation, along arrow III of Figure 1, and illustrating the kinematics of the movement of the transfer arms belonging respectively to the two opposite robots;
• FIG. 4 is a very schematic and sectional view illustrating the press stamping stations or members and the operation of the spray bars;
• - Figures 5 and 6 are respectively sectional and top views of a burr associated with a workpiece and allowing its gripping by the transfer arms of the two opposite robots; and - Figures 7 and 8 are respectively sectional and top views of another form of burr associated with the part.
• FIGS. 1 to 4 we see a forging press P equipped with four adjacent tools or forging bodies marked respectively in 1, 2, 3 and
• Each matrixing member 1, 2, 3, 4 has a upper matrix 1a, 2a, 3a and 4a integral with a slide 5 (FIG. 3), and a lower matrix 1b, 2b, 3b and 4b.
• FIGS. 1 and 2 There has been shown at 6 in FIGS. 1 and 2, a robot provided with an arm 7 for feeding a piece or a blank (21) to the press on precisely the lower die 1b of the first stamping tool 1 .
• each robot 8, 9 comprises, as known per se, a arm 8a, 9a for transferring the parts.
• each arm 8a, 9a comprises a plurality of gripping members identified at 10, 11, 12 and 13, as regards the gripping members carried by the arm 8a of the robot 8, and identified at 14, 15 , 16 and 17 as regards the gripping members carried by the arm 9a of the robot 9.
• gripping members are four in number for each robot 8, 9, this number corresponding to the number of stamping members 1, 2, 3 and 4.
• FIGS. 1, 3 and 4 have shown at 18 watering booms which are preferably orientable and which, like the gripping members 10 to 17, are integral with the arms 8a, 9a of the opposite robots 8, 9. These watering bars, as can be seen in the figure
• each arm 8a, 9a has three spraying or lubrication ramps for the forging tools 1,
• the robots 8 and 9 each comprising four stations or gripping members work in synchronization for the transfer of the parts.
• These gripping members can constitute a set of aligned grippers which make it possible to transfer several parts at the same time, so that the transfer time is halved, which considerably increases the productivity.
• one forging tool in two works during the descent of the slide 5, so that it is advantageous to alternately provide blowing, lubrication and cooling of the tooling.
• pieces 21 are brought and positioned by the arm 7 of the robot 6 in the first stamping operation, that is to say on the lower die 1b of the tool matrixing 1.
• the cycle then proceeds as follows.
• the imprints (not shown) of the stamping tools 1 and 3 are blown to descale them and lubricated by the spray bars 18 which, as explained above, are integral with the bars transfer 8a and 9a.
• the outlet orifices of the lubricant jets are oriented in the direction of the cavities and only those which are arranged opposite the empty cavities (2b and 4b, in the case of FIG. 4) are put into service. , while the other jets are closed. Then, the bars 8a, 9a carrying the .ramps 18 and the gripping members recede simultaneously during the descent of the slide.
• the part which is in the trimming position 4b is evacuated through the lower die during the press stroke and falls on any inclined plane shown at 22 in FIG. 2. It will be observed here that the trimming station 4b being directly associated with the preceding forging stations, the size of the installation is advantageously reduced, which thus does not need to include a special deburring station situated outside the press. In addition, such an association advantageously avoids the provision of an intermediate manipulator arm ensuring the transfer of the forged part from the forging press to a deburring press.
• the slide 5> st then reassembled, the transfer bars 8a, 9a, advance and raise the part in position 2b and the burr detached from the finished part in 4b, then the robots 8 and 9 are translated to place the part in 3b at the same time as the removal in lb of another piece thanks to the arm 7 of the robot 6. It should be noted that during forging, the robots 8 and 9 return to the initial retracted position.
• the manufacturing cycle can comprise, as explained above, either two operations, that is to say two press strokes per piece, the latter then being only deposited on the station lb without being worked on, or three operations.
• the forging takes place from the first stamping station 1 to carry out a phase called “crushing” or "distribution of material”.
• the gripping members 10 and 14 corresponding to the first stamping station 1 must have a particular configuration in order to be able to grasp the piece 21.
• two possible variants have been illustrated in FIG. of structure for the gripping members 10 and 14.
• the first stamping tool (1 or 2) can act on the piece 21 to form a burr having the desired shape and facilitating the gripping of the part by the organs grippers.
• a blank part E with which is associated a burr B forming in a way two small wings allowing the gripping of the blank by the gripping members integral with the arms 8a, 9a of the robots 8 and 9.
• FIGS. 7 and 8 a variant of burr shape has been shown associated with the blank E and which here has the shape of a tongue or the like C.
• the shape of the gripping members 10 to 13 and 14 to 17 respectively adapts to these two configurations.
• the installation according to this invention makes it possible to produce parts of variable volume and mass, it being understood that the transfer bars 8a, 9a of the robots 8 and 9 can be quickly assembled and disassembled to allow pre-adjustment outside the machine.
• the gripping members 10 to 17 can be easily and quickly changed after rotation of the "mirror" robots 8, 9 as seen in FIG. 1.
• the installation of this invention is somewhat universal in the sense that it can process parts according to any number and having any shape, and this with a minimum transfer time.
• the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example.
• this installation may include elements other than those described, namely for example a cover protecting the two robots 8, 9 and their equipment against dust and a cooling and overpressure system installed under this cover to guarantee correct and reliable operation of the robots in all circumstances.
• the invention includes all the technical equivalents of the means described and their combinations if these are carried out according to the spirit.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Forging (AREA)

Applications Claiming Priority (2)

Publications (2)

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• 1989
  • 1989-06-07 FR FR8907547A patent/FR2648062B1/fr not_active Expired - Fee Related
• 1990
  • 1990-06-01 DE DE69004543T patent/DE69004543T2/de not_active Expired - Fee Related
  • 1990-06-01 WO PCT/FR1990/000384 patent/WO1990014903A1/fr active IP Right Grant
  • 1990-06-01 EP EP19900908559 patent/EP0432236B1/de not_active Expired - Lifetime
  • 1990-06-01 ES ES90908559T patent/ES2045925T3/es not_active Expired - Lifetime

Non-Patent Citations (1)

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