Stamping press

Abstract

A stamping press includes a first body (200) and a second body (100,300), at least one of them having axial movement, the first body have a third body (255) with controlled rotary movement capability, and the second body have a fifth body (115,350) that also has rotary movement, the third body (255) and the fifth body (115,350) rotary movements as well as the axial movements from the first body (200) and the second body (100,300) are independent with respect to each other.

Claims

1. Stamping press for stamping a metal blank into a metal coil, comprising: a first body, a second body, at least one of the first body and second body having an axial movement, the first body holding a third body for controlled rotary movement, a hydraulic cushion which supports the third body, said third body having an actuator to provide said rotary movement, the second body holding a fifth body for rotary movement, a hydraulic cushion which supports the fifth body, the rotary movements of the third body and the fifth body as well as axial movements of the first body and the second body being independent with respect to each other; a contour punch; a scrap coil ejector; the first body has, surrounding the third body, a fourth body with axial movement capability with respect to said third body; a hydraulic cushion which supports the fourth body to eject scrap from the metal coil cut out by the contour punch with the scrap coil ejector, the scrap being formed as slugs deriving from parts punched by the contour punch to form pierced holes; the fifth body ejecting a finished part out of the stamping press; wherein the independent linear and rotary movements produce a variable pitch on blanked parts according to a variation of feed movements of the first body, the second body against the rotation movements of the third body and the fifth body during a single blanking action of a single press cycle.

2. Stamping press according to claim 1, wherein the third body is hollow, and wherein the slugs are removed through a hollow portion of the third body.

3. Stamping press according to claim 1, further comprising an internal ejector to remove the slugs through ejector pins and a device which engages the ejector pins, the internal ejector having a rotary movement and an axial movement.

4. Stamping press according to claim 3, wherein the internal ejector is held by the third body and has at least one element for rotary movement.

5. Stamping press according to claim 1, wherein the fourth body is formed as a casing around the third body and includes a fixed element fitted to one of a press frame and a press bench, and a mobile element movable with respect to said third body.

6. Stamping press according to claim 1, wherein the fourth body is formed by one of: a set of acting hydraulic elements and a set of acting electromechanical elements placed around the third body.

7. Stamping press according to claim 1, wherein the third body includes at least one spindle head.

8. Stamping press according to claim 1, further comprising a tool with mobile components having at least one of axial and rotary movements operated by the stamping press.

9. Stamping press according to claim 1, wherein the fifth body has a free rotary movement.

10. Stamping press according to claim 1, wherein the fifth body has a controlled rotary movement powered by an actuator.

11. Stamping press according to claim 10, wherein the second body includes, placed around the fifth body, a sixth body with axial movement capability.

12. Stamping press according to claim 11, wherein the sixth body is formed as a casing around the fifth body and includes a fixed component held to a ram of the stamping press and a mobile element.

13. Stamping press according to claim 11, wherein the sixth body is formed by one of: a set of acting hydraulic elements and a set of acting electromechanical elements placed around the fifth body.

14. Stamping press according to claim 10, further comprising a spindle head that moves together with the fifth body.

15. Stamping press according to claim 14, further comprising an ejector with axial movement and controlled rotary movement powered by the actuator, the ejector having an internal axial groove contour, and the spindle head having an external axial groove contour allowing free relative axial movements as well as direct rotary movement transmission with respect to each other.

16. Stamping press according to claim 14, wherein the spindle head has at least one rotary element with controlled movement.

17. Stamping press according to claim 16, wherein the at least one rotary element has a controlled axial movement.

18. Stamping press according to claim 1, wherein the fifth body comprises different independent spindle heads.

19. Stamping press according to claim 1, wherein a single press frame of the stamping press is adapted to hold more than one operation unit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Eleven pages with eleven figures are enclosed in which the essence of the invention is represented as an example, where:

(2) FIG. 1 shows a schematically sectional view of the press of the invention according to a first embodiment, in which a first body (represented as a lower body) represents the press bench, and where a third rotary body with hollow core and a fourth body with lineal movement are placed, and a second body that constitutes the ram of the press is provided with a fifth body with free or controlled rotary movement;

(3) FIG. 2 shows a schematically sectional press view according to a second embodiment, in which the first and second body positions are inverted, as well as their associated components; in this second embodiment the second body constitutes the bench and the first body is the ram, the third rotary body has inside an internal element that has the capability to make linear (axial) movements, such as an ejector, with free or controlled rotary movement;

(4) FIG. 3 shows a schematically sectional press view according to a third embodiment in which the first body is substantially identical to that of FIG. 1 where the second body (upper) has a fifth body with controlled rotary movement with one or more punches in a centered or non centered position, said fifth body being inserted inside a sixth body formed by a hollow cylinder with axial movement capability;

(5) FIG. 4 shows a sectional press view according to a fourth embodiment in which are combined the features of the first body of FIG. 2 with the features of the second body of FIG. 3, in an inverted position;

(6) FIG. 5 shows a schematically sectional press view according to a fifth embodiment in which the first body is basically identical to those of FIGS. 1 and 3, and where the second body in addition to the fifth and sixth bodies of FIG. 3 comprises one or more independent elements with controlled rotary movement;

(7) FIG. 6 combines the features of the first body of FIGS. 2 and 4 with the second body of FIG. 5 in an inverted position; the internal element of the third body can have one or more rotary elements;

(8) FIG. 7 shows a schematically sectional press view according to a seventh embodiment, in which the first body is basically identical to the one show in FIGS. 1, 3 and 5, and the second body is as that of FIG. 5, but where the independent elements of the fifth body have also axial controlled movement capability;

(9) FIG. 8 combines the features of the first body of FIG. 6 with the second body of FIG. 7, but in an inverted position;

(10) FIG. 9 shows a detail of a spindle head in the fifth body according to FIGS. 3 and 4 in which is shown a punch retaining system;

(11) FIG. 10 shows a detail from a spindle head at the fifth body according to FIGS. 5 and 6 where the independent elements with controlled rotary movement capability and the punches that they hold can be seen;

(12) FIG. 11 Shows a detail from a head at the fifth body according to embodiments of FIGS. 7 and 8 in which the independent elements with controlled rotary movement capability and controlled axial (lineal) movement with the punches that they hold can be seen.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(13) As explained above the present invention consists of a stamping press that is composed by a first body (200), usually placed in the lower position, and this first body has a bench (235), and a second body (100,300), usually placed in the upper position and constituting the ram press. The first body (200) has a third body (255); this third body (255) is placed over the press frame (295) or in the press bench (235) and has a rotary movement against the press bench (235). This third body (255) is composed of a hollow cylinder that is supported by a hydrostatic system over the press frame (295). This third body (255) will be normally supported by a hydraulic cushion (270,275), with an upper chamber (270) and a lower chamber (275). The filling or leaking action of those chambers will produce a linear movement of the third body (255) against the press bench (235), and to get a perfect position adjustment of the third body itself, this position usually will be locked during the operation or alternatively will produce a lineal movement for certain operations. The third body (255) comprises an actuation zone by means of an actuator (290). This actuator can be composed by a mechanical, hydraulic, electrical, among others.

(14) Surrounding the third body (255) there is a fourth body (245,280) that is composed of a fixed part (280) usually held to the press frame (295) or to the press bench, and a mobile part (245). This fourth body (245,280) has also a hydraulic cushion (260,265) to generate axial movements, and this cushion has an upper chamber (260) and a lower chamber (265), with the axial movement generated by adding or leaking fluid into the different chambers. The fourth body (245,280) can be manufactured as a hollow cylinder around the third body (255) or by a set of cylinders placed around the third body (255). The fourth body (245,280) will move a set of transfer pins (240) that will transfer the movement to the tool transfer pins (225).

(15) According to the first embodiment shown in FIG. 1, on the press is assembled a tool with a lower base plate (230), a contour punch (215), a scrap coil ejector (210), and a rotary movement transmission mechanism (250) between the third body (255) and the tool components. According to this configuration the contour punch (215) will rotate as much as the actuator (290) generates the rotary movement over the third body (255).

(16) The second body (100), (ram press), is moved by a hydraulic cylinder (105). It comprises a fifth body (115) that is supported by a hydraulic cushion (125,130). This hydraulic cushion has an upper chamber (125) and a lower chamber (130) that will control its axial movement as well as its axial position. This fifth body has the capability to get free rotary movement or also controlled rotary movement by an actuator (not represented in the first embodiment). Said fifth body (115) operates on some transfer pins (150) supported on the tool over a partial circular groove in the upper tool plate. The transfer pins (150) move the ejector (170) through the die (145) held by the upper plate (135). A piercing punch in the center position is represented by (160), and is located in a retaining plate (140) that has a free rotary mechanism, this mechanism can have any shape as it moves under a synchronized movement against the third body (255) when a part is being cut and when the part is being ejected from the tool, and this synchronized movement will be produced by the part itself at a cutting action or will be produced by a controlled rotary movement produced by an actuator.

(17) According to a second embodiment shown in FIG. 2, the press will be in an inverted position with respect to the first embodiment, with the first body (200) in the upper position and the second body (100) in the lower position. The second body in this case is identical to that of the first embodiment.

(18) This position does not allow removing the slugs through the upper part, the third body (255) will have an internal component (203) with lineal movement, with free or controlled rotary movement, or that will hold at its end a device (202) that will have such movement capability. One or more ejectors (201) are held by the device (202).

(19) According to a third embodiment, it can be seen that the press also includes a first body (200) and a second body (300) (it has the same name but different number than that of the first embodiment due to a higher press complexity); the first body (200) is basically equal to the first press model, so it shall not be described again.

(20) The second body, represented in the upper position in FIG. 3, comprises a fifth body (350); this fifth body (350) is a rotary element with respect to said second body (300) and has at least one spindle head (365) associated to or integrated in it. This fifth body (350) is composed by a hydraulic element that is supported hydrostatically by said second body (300). Said fifth body (350) will be usually supported by a hydraulic cushion (320,325) with an upper chamber (320) and a lower chamber (325). The filling or leaking action over those chambers will produce a linear movement of this fifth body (350) with respect to the second body (300) for a perfect position adjustment, and this position usually will be locked during the operation or will produce a linear movement for certain operations. The fifth body (350) has a rotary operation area by means of an actuator (315). This actuator can be composed by a mechanical, hydraulic, electrical, among others.

(21) Surrounding the fifth body (350) there is a sixth body (330,345) that has a fixed part (330) respect to the fifth body (350) and a mobile part (345). This sixth body (330,345) has also a hydraulic cushion (335,340) to generate axial movements, which is formed by an upper chamber (335) and a lower chamber (340) and filling or leaking those chambers will be produce the desired movement. The sixth body (330,345) can be composed by a hollow cylinder crossed through by the fifth body (350) or be composed by a set of hydraulic or electromechanical elements placed around the fifth body (350). The sixth body (330,345) will move a set of transfer pins (355) that will act on an ejector (375). The ejector (375) moves with axial and/or rotary movement inside the die (370). The ejector (375) is fitted to the spindle head (365) of the fifth body (350). The fifth body (350) and the spindle head (365) are usually assembled by means of a joint (360) in such a way that the first one transmits to the second one the synchronized rotary movement, and this spindle head (365) transmits the rotary movement to the ejector (375). Held by the spindle head (365) are placed punches (385) that move together with the spindle head in all its axial or rotary movements.

(22) According to a particular design the ejector (375) has a pattern with some internal axial grooves that engage to a similar external axial groove pattern of the spindle head (365), with free relative axial movement, but with synchronized rotary movement with respect to each other; nevertheless, as an alternative design both, the spindle head and the ejector, can have independent rotary movements acted by respective actuators with synchronized movements by means of a corresponding programming operation.

(23) According to a fourth embodiment shown in FIG. 4, the press is in an inverted position respect to the third embodiment, with the first body (200) in the upper position and the second body (300) in the lower position. The first body (200) is essentially the same as that of second embodiment, and the second body (300) substantially identical to that of the third embodiment. The internal mobile component (203) can hold one or more rotary elements in concordance to the rotary elements of the second body.

(24) According to a fifth embodiment shown in FIG. 5, similar to the third embodiment, the fifth body which has axial and rotary movements capability, and is supported by the second body (300) has at least one spindle head (365) that has one or more rotary elements (304) integrated in it. Nevertheless, the spindle head can be integrated in the fifth body itself. These rotary elements (304) are actuated by an actuator that allows a positional and speed controlled movement of these rotary elements (304). The first body is essentially identical to that in the third embodiment.

(25) According to a sixth embodiment shown in FIG. 6, the position of the first body (200) and the second body (300) are inverted, and the third body supported by the first body, as in the fourth embodiment, is provided with at least one internal element with axial and maybe also rotary movements, or can have independents rotary elements.

(26) A more complex press design is done by the seventh embodiment shown in FIG. 7. In addition to the elements of the fifth embodiment, the rotary elements (304) held by the spindle head (365) which in turn is held by the fifth body (350) have axial controlled movement capability. This movement capability comes from a hydraulic component, as an example a hydraulic cylinder with simple or double action with an upper chamber (302) and a lower chamber (303), with both speed and position controlled.

(27) According to an eighth embodiment shown in FIG. 8, the positions of the first and second bodies are inverted, the first body in essence is similar to the one on the sixth embodiment, and the second body is in essence like the one on the seventh embodiment.

(28) According to the part to be manufactured, the press will have also a tool with certain internal components with the capability to have independent axial or rotary movements, whose operation movements are transferred by the press to the tool components independently.

(29) In the explanation given above, the expression controlled movement means a movement with instant exact position and speed at the time the press has control of them, being said movements acted by means of actuators.

(30) The references to the axial or linear movements describe the approaching or moving away movements between the first and the second press bodies or the components that they hold.

(31) Even when certain systems are described as hydraulic systems as they are the most commonly used systems in this kind of applications, the actuators could also be electromechanical or others within the purpose of the present invention.

(32) As the axial movements of the first and the second bodies are relative to each other, the operation can be of one, the other or both.