The present invention relates to a press system for removing the pressed pieces from under the press sheet metal strip used in processes such as forming, bending, punching, cutting and drawing.

Background of the Invention

Mechanical presses work with the principle of transferring the kinetic energy, which is accumulated by rotating the flywheel, to the ram as power by means of a mechanism. Today, the flywheel is replaced by the servo motor and these types of presses are called servo motor controlled presses (servo press).

In the state of the art, two or more sheet metal forming processes (such as cutting + punching or cutting + forming or cutting + bending) can be performed together in the compound dies. The piece that is formed after the said operations remains on the sheet metal strip. In this case, first the piece is removed from the sheet metal strip roll and then the sheet metal strip is moved forward to proceed to the next pressing operation. An example of compound dies is provided in the state-of- the-art Japanese patent document numbered JP2000233239A. The said patent document discloses a press die for piercing an inclined part, and at the same time forming a flange on the part. Furthermore, an example of compound dies is provided in the state-of-the-art United States patent document numbered US20040020261A1. The said patent document discloses a compound press forming apparatus and a compound press forming method. The invention discloses a press system comprising one upper die and a plurality of side dies and conducts two different forming processes at the same time. However, the piece pressed in the compound dies remains on the sheet metal strip and therefore first the piece must be removed and then the sheet metal strip should be moved forward . This causes a waste of time and a decrease in production rate.

In the state of the art progressive dies, in order to remove the piece produced in the operation steps including height such as forming/bending, in other words, in order to remove the piece on the sheet metal strip, the piece on the sheet metal strip must be leaped over the lower die. In order to carry out this process, the sheet metal strip must be lifted up a certain amount above the lower die at each stamping. The sheet metal strip can be fed (moved forward) after being lifted up. An example of progressive dies is provided in the state-of-the-art US patent document numbered US5349740A. The said patent document discloses a method of producing an electric motor. In order to realize the production of electric motors, each part is formed in the dies and then removed from the strip. However, in the progressive dies, first lifting the sheet metal strip up from the lower die and then feeding it at each press stamping causes a waste of time. In addition, lifting the sheet metal strip at each stamping causes vibration, shaking and bouncing of the sheet metal strip where rapid production is required. This can lead to poor piece stamping quality. In addition, in order to increase the quality of the pieces and minimize the errors resulting in production, the production rate must be reduced.

During the die forming steps applied in the transfer production systems in the state of the art, the piece is moved by being moved in 3 axes. Automatic pressing is performed by first holding it from the side, then lifting it up and then moving it to the next die-forming step. As an example of transfer production systems, the- state-of-the art United States patent document numbered US3834213A discloses a mechanism for moving the workpiece that is produced by pressing method by means of an arm extending from outside. However, in the transfer production system, the press-formed workpiece needs to be lifted up, and this causes the production rate to decrease. In addition, centering problems may be experienced when lifting and lowering the workpiece during lifting and removing the workpiece. This can reduce workpiece pressing quality.

Problems Solved by the Invention

The objective of the present invention is to provide a press system which increases the production rate in dies used in processes such as forming, bending, punching, cutting and drawing.

Another objective of the present invention is to provide a press system which enhances product quality and production rate by eliminating the problems of vibration and bouncing on the sheet metal strip observed in the progressive dies used in processes such as forming, bending, punching, cutting and drawing.

A further objective of the present invention is to provide a press system which increases the production rate in press systems operating with transfer system by eliminating the transfer mechanism upward/downward movement.

Detailed Description of the Invention

A press system developed to fulfill the objective of the present invention is illustrated in the accompanying figures wherein:

Figure 1 is a perspective view of the press system.

Figure 2 is a perspective exploded view of the press system.

Figure 3 is a front schematic view of the press system.

Figure 4 is a front schematic view of another embodiment of the press system.

The components in the figures are given reference numbers as follows: 1. Press system

2. Body

21. Forming area

3. First actuator

4. Belt transmission system

41. Belt

42. Flywheel

5. First sliding mechanism

51. First gear

52. First crank

53. First rod

6. Ram

7. Second actuator

8. Second sliding mechanism

81. Second gear

82. Second crank

83. Second rod

9. Lower table A press system (1) for removing the pieces stamped in the presses from under the sheet metal strip essentially comprises

at least one body (2),

at least one forming area (21) provided on the body to enable forming the metal workpiece therein,

- at least one first actuator (3) placed on the body (2),

at least one first sliding mechanism (5) placed on the first actuator (3), at least one ram (6) which is connected to the first sliding mechanism (5) and which is adapted to move within the forming area (21) by the help of the first sliding mechanism (5),

- at least one second actuator (7) placed on the body (2), at least one second sliding mechanism (8) to which the second actuator (7) transmits the rotational movement that it provides,

at least one lower table (9) which is connected to the second sliding mechanism (8) and which moves within the forming area (21) to correspond to the ram (6) by means of the second sliding mechanism (8).

In a preferred embodiment of the present invention, at least one belt transmission system (4) for adjusting the rpm (revolutions per minute) of the first actuator (3) essentially comprises

at least one belt (41) which is connected to the rotationally moving shaft of the first actuator (3),

at least one flywheel (42) which is placed on the belt (41) and which includes thereon a gear that is positioned concentrically therewith.

The first sliding mechanism (5) essentially comprises

at least one first gear (51) which is placed on the body (2) so as to contact the gear positioned on the flywheel (42) or the shaft provided on the first actuator

(3),

at least one first crank (52) placed on the central axis of the first gear (51), at least one rod (53) placed on the first crank (52).

The second sliding mechanism (8) essentially comprises

at least one second gear (81) placed on the rotationally moving shaft of the first actuator (7),

at least one second crank (82) which is placed on the second gear (81) such that it is concentric with the second gear (81),

at least one rod (83) placed on the second crank (82).

A press system (1) for removing the pieces stamped in the presses of the present invention from under the sheet metal strip comprises a body (2), and a forming area (21) is formed on the said body (2). In the said forming area (21), the workpiece is pressed. There is provided a first actuator (3), and in a preferred embodiment of the invention, the first actuator (3) is disposed on the body (2). In a preferred embodiment of the invention, an induction motor is used as the first actuator (3). In a preferred embodiment of the invention, there are two first actuators (3). A first sliding mechanism (5) is connected on the shaft of the first actuator (3) which makes a rotational movement around its own center, and with the rotational movement of the shaft, the first sliding mechanism (5) converts the rotational movement to linear movement. In a preferred embodiment of the invention, there are two first sliding mechanisms (5). Upon movement of the first sliding mechanism (5), a ram (6) connected to the end of the first sliding mechanism (5) moves linearly in the forming area (21) provided on the body (2). There is provided an upper die on the ram (6). There is provided a second actuator (7) in the press system (1); and the second actuator (7) is preferably disposed on the body (2). In a preferred embodiment of the invention, an induction motor is used as the second actuator (7). In a preferred embodiment of the invention, there are two second actuators (7). A second sliding mechanism (8) is disposed on the second actuator (7). The second sliding mechanism (8) connected to the rotationally moving shaft of the second actuator (7) converts the rotational movement to linear movement. In a preferred embodiment of the invention, there are two second sliding mechanisms (8). A lower table (9) is placed on the second sliding mechanism (8), and by means of the second sliding mechanism (8), the lower table (9) moves linearly within the forming area (21). There is provided a lower die on the lower table (9). In addition, the lower table (9) is positioned so as to correspond to the ram (6).

The piece intended to be formed should first be brought into the forming area (21). Forming is performed by simultaneously applying pressure on the piece in the forming area (21) by the upper die on the ram (6) and the lower die on the lower table (9). In other words, the ram (6) moves from top to bottom in the forming area (21) by means of the first sliding mechanism (5), and simultaneously the lower table (9) moves from bottom to top in the forming area (21) by means of the second sliding mechanism (8). Through the said reciprocal movement of the ram (6) and the lower table (9), the piece between the ram (6) and the lower table (9) is formed. After the forming of the piece pressed with the upper die and the lower die is performed, the formed piece remains on the lower die on the lower table (9) under the influence of gravity or a pusher, and the formed piece moves together with the lower table (9) and descends. The formed piece which descends with the lower table (9) is removed from the lower die on the lower table (9) by the user or through a conveying system. Upon removal of the formed piece, the lower table (9) moves again from the bottom to the top and performs the forming of a new piece. By means of the press system (1) of the present invention, the production rate increases in the dies used in the processes such as forming, bending, punching, cutting and drawing. Furthermore, by means of the press system (1) of the present invention, product quality and production rate are enhanced by eliminating the problems of vibration and bouncing on the sheet metal strip observed in the progressive dies used in the processes such as forming, bending, punching, cutting and drawing.

In the press system (1) of the present invention, a first actuator (3) is disposed on the body (2). In a preferred embodiment of the invention, a belt transmission system (4) is placed on the first actuator (3). The belt transmission system (4) is used to adjust the speed (rpm) of the rotational movement coming from the first actuator (3). The belt transmission system (4) essentially comprises a belt (41) which is disposed on the rotationally moving shaft of the first actuator (3), and a flywheel (42) which is positioned on the body (2) and extends onto the belt (41). The flywheel (42) can make a rotational movement around the point where it is placed on the body (2), and additionally, there is provided a gear positioned on the flywheel (42) such that it is concentric therewith. A first sliding mechanism (5) is connected onto the belt transmission system (4). The first sliding mechanism (5) essentially comprises a first gear (51) disposed on the body (2), a first crank (52) positioned in the central axis of the first gear (51), and a first rod (53) placed at the moving end of the first crank (52). In other words, the first gear (51) is arranged on the body (2) so as to contact the gear positioned on the flywheel (42) or the shaft of the first actuator (3). The first crank (52) can make rotational movement such that it is concentric with the first gear (51). A ram (6) is connected onto the first sliding mechanism (5), and the ram (6) is able to move linearly within the forming area (21) by means of the first sliding mechanism (5). An upper die is placed on the ram (6). In other words, the ram (6) is able to move linearly in the forming area (21) provided on the body (2) by means of the first sliding mechanism (5). In other words, a ram (6) is connected onto the first rod (53). A second actuator (7) is preferably placed on the body (2). A second sliding mechanism (8) is connected to the second actuator (7). The second sliding mechanism (8) essentially comprises a second gear (81) connected to the rotationally moving shaft of the second actuator (7), a second crank (82) connected onto the second gear (81) such that it is concentric therewith, and a second rod (83) connected onto the second crank (82). A lower table (9) is connected onto the second sliding mechanism (8). By means of the second sliding mechanism (8) connected thereon, the lower table (9) is able to move towards the ram (6) within the forming area (21).

A belt (41) is placed on the shaft of the first actuator (3), which is placed on the body (2), rotating about its own axis; and the belt (41) is connected to the flywheel (42). As the shaft makes a rotational movement around its own axis, the belt (41) also makes rotational movement and moves the flywheel (42) provided in the belt (41). In addition to the flywheel (42) making a rotational movement about its own axis, the gear disposed on the flywheel (42) also makes rotational movement such that it is concentric with the flywheel (42). The first gear (51) which comes into contact with the gear upon the rotational movement of the gear also makes a rotational movement. Upon rotational movement of the first gear (51), the first crank (52), which is connected to the first gear (51), also makes a rotational movement such that it is concentric with the first gear (51). Upon rotational movement of the first crank (52), the first rod (52) connected to the first crank (52) also moves. One end of the first rod (53) is connected to the first crank (52) and the other end thereof is connected to the ram (6). Upon the rotational movement of the first crank (52), the first rod (53) enables the ram (6) to move linearly from top to bottom in the forming area (21) which is provided on the body (2). At the same time, the second gear (81), which contacts the shaft of the second actuator (7) rotationally moving on the actuator, also makes a rotational movement. Upon the rotational movement of the second gear (81), the second crank (82), which is connected to the second gear (81), also makes a rotational movement such that it is concentric with the second gear (81). Upon the rotational movement of the second crank (82), the second rod (82) connected to the second crank (83) also moves. One end of the second rod (83) is connected to the second crank (82) and the other end thereof is connected to the lower table (9). Upon the rotational movement of the second crank (82), the second rod (83) enables the lower table (9) to move linearly from bottom to top in the forming area (21) which is provided on the body (2).

The piece intended to be formed should first be brought into the forming area (21). Pressure is applied on the piece in the forming area (21) simultaneously by the upper die on the ram (6) and the lower die on the lower table (9). After the forming of the piece pressed with the upper die and the lower die is performed, the formed piece remains on the lower die on the lower table (9) under the influence of gravity, and the formed piece moves together with the lower table (9) and descends. The formed piece which descends with the lower table (9) is removed from the lower die on the lower table (9) by the user or through a conveying system. Upon removal of the formed piece, the lower table (9) moves again from the bottom to the top and forms a new piece. By means of the press system (1) of the present invention, the production rate increases in the dies used in the processes such as forming, bending, punching, cutting and drawing. Furthermore, by means of the press system (1) of the present invention, product quality and production rate are enhanced by eliminating the problems of vibration and bouncing on the sheet metal strip observed in the progressive dies used in the processes such as forming, bending, punching, cutting and drawing.