Bending aid for a press brake

Patent metadata

Field	Value
Publication number	US-10363591-B2
Application number	US-201515126627-A
Country	US
Kind code	B2
Filing date	Mar 16, 2015
Priority date	Mar 19, 2014
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

The invention relates to a support device (15) for a press brake, comprising a base frame (24) and a support plate (17) with a bearing surface (18) which can be positioned between a base position (26) and a maximum position (27). The support plate (17) is arranged on a lever linkage system (25) which is connected to a drive unit (32) and which is designed as a parallel kinematics system. The drive unit (32) comprises a crank (35), which is connected to a positioning drive (33) designed as a rotary drive (34), and a rocker (54), which is connected to the crank in an articulated manner. The rocker (54) is connected to the crank (35) by means of an eight rotary joint (55) and to the lever linkage system (25) by means of a ninth rotary joint (56).

First claim

The invention claimed is:

1. A support device for a press brake, comprising:
(a) a base frame;
(b) at least one connecting plate arranged on the base frame for securing the support device on the press brake and defining a perpendicular connecting plane;
(c) a drive unit comprising a crank;
(d) a lever linkage system connected to the drive unit and comprising a parallel kinematic system, the lever linkage system comprising
a first main lever arm with a first rotary joint and a second rotary joint separated from the first rotary joint by a first standard interval and
a second main lever arm with a third rotary joint and a fourth rotary joint arranged parallel to the first main lever arm, the third rotary joint being separated from the fourth rotary joint by a second standard interval,
wherein the first main lever arm and the second main lever arm are mounted on the base frame by the first rotary joint and the third rotary joint,

wherein the first rotary joint and the third rotary joint lie in a main bearing plane;
(e) a support plate arranged on the lever linkage system and comprising a bearing surface positionable between a first end position and a second end position;
(f) a first support arm parallel to the main bearing plane and mounted on the first main lever arm and the second main lever arm by the second rotary joint and the fourth rotary joint, the first support arm comprising a part projecting over the fourth rotary joint;
(g) a second support arm;
(h) a positioning drive comprising a rotary drive connected to the crank;
(i) a rocker joined to the rotary drive;
(j) a fifth rotary joint arranged on the part of the first support arm projecting over the fourth rotary joint; and
(k) a sixth rotary joint, a seventh rotary joint, an eighth rotary joint, and a ninth rotary joint;
wherein the first standard interval between the first rotary joint and the second rotary joint is equal to the second standard interval between the third rotary joint and the fourth rotary joint and the second rotary joint and the fourth rotary joint are spaced further from the perpendicular connecting plane than the first rotary joint and the third rotary joint;
wherein the support plate is mounted on the first support arm by the fifth rotary joint;
wherein the support plate is connected by the sixth rotary joint to the second support arm;
wherein the second support arm is connected parallel to the first support arm by the seventh rotary joint to the first main lever arm or the second main lever arm and the seventh rotary joint is arranged along a straight line extending through the first rotary joint and the second rotary joint or extending through the third rotary joint and the fourth rotary joint; and
wherein the rocker is connected by the eighth rotary joint to the crank and by the ninth rotary joint to the lever linkage system.

2. The support device as claimed in claim 1 , wherein the rocker is connected by the ninth rotary joint to the support arm of the lever linkage system.

3. The support device as claimed in claim 2 , wherein the rocker is connected on a section of the support arm projecting above the second rotary joint to the second rotary joint.

4. The support device as claimed in claim 1 , wherein the crank in the first end position of the support plate is arranged at an acute angle between 1° and 20° relative to the rocker, and wherein the crank and the rocker are arranged relative to one another in the second end position of the support plate at an acute first angle between 160° and 179°.

5. The support device as claimed in claim 1 , wherein the crank of the positioning drive in the first end position of the support plate is rotated so that the crank is arranged at a second angle between 180° and 270° relative to the perpendicular connecting plane.

6. The support device as claimed in claim 1 , wherein the crank of the positioning drive is rotated in the second end position of the support plate so that the crank is arranged at a second angle between 0° and 45° relative to the perpendicular connecting plane.

7. The support device as claimed in claim 1 , wherein the positioning drive comprises a servomotor.

8. The support device as claimed in claim 1 , wherein the support arm is spaced apart further from the main bearing plane than the support arm.

9. The support device as claimed in claim 1 , wherein between the connecting plate and base frame an adjusting device is arranged, wherein the base frame adjustable via the adjusting device relative to a position of the base frame to the connecting plate parallel to the perpendicular connecting plane in a vertical direction.

10. The support device as claimed in claim 9 , wherein the adjusting device comprises a drive motor.

11. The support device as claimed in claim 1 , wherein the connecting plate on an interface of the connecting plate to the press brake has a linear guide, so that the support device is adjustable relative to the press brake parallel to the perpendicular connecting plane in a horizontal direction.

12. The support device as claimed in claim 1 , wherein the support device comprises a protective cover, wherein the protective cover comprises a fixed section and a section which can be moved with the support plate, and the first main lever arm and/or the first support arm comprises at least in sections an external contour adjusted to the internal contour of the protective cover.

13. The support device as claimed in claim 1 , wherein the distance of the fifth rotary joint to the sixth rotary joint is between 25% and 60% of the distance of the first rotary joint to the second rotary joint and wherein the fourth rotary joint has the same distance from the fifth rotary joint as the first rotary joint from the second rotary joint.

14. The support device as claimed in claim 1 , wherein the distance of the ninth rotary joint from the seventh rotary joint is between 5% and 30% of the distance of the first rotary joint from the second rotary joint and wherein the distance of the eighth rotary joint from the ninth rotary joint is between 110% and 145% of the distance of the first rotary joint to the second rotary joint, and wherein the distance of the center of rotation of the positioning drive from the eighth rotary joint is between 45% and 75% of the distance of the first rotary joint from the second rotary joint.

15. The support device as claimed in claim 1 , wherein the distance of the first rotary joint from the third rotary joint is between 25% and 60% of the distance of the first rotary joint from the second rotary joint, and wherein the horizontal distance of the first rotary joint from the third rotary joint is between 15% and 40% of the distance of the first rotary joint from the second rotary joint and wherein the horizontal distance of the center of rotation of the positioning drive from the third rotary joint is between 35% and 65% of the distance of the first rotary joint from the second rotary joint.

16. A processing system comprising a press brake with a first adjustable pressing bar, which comprises a first tool holder and a second fixed pressing bar, which comprises a second tool holder, and a support device for supporting a sheet metal to be processed, which via at least one connecting plate can be secured onto the press brake, wherein the support device is designed according to claim 1 .

Assignees

• Trumpf Maschinen Austria Gmbh & Co Kg

Inventors

• Badegruber Karl
• Secibovic Kabir

Classifications

• B21D43/105

  Manipulators, i.e. mechanical arms carrying a gripper element having several degrees of freedom · CPC title

• B21D5/0281 Primary

  Workpiece supporting devices · CPC title

• B21D5/02

  on press brakes without making use of clamping means · CPC title

• B21D43/145

  Turnover devices, i.e. by turning about a substantially horizontal axis · CPC title

• B21D5/002

  Positioning devices · CPC title