Sheet metal positioning assembly for use with a sheet metal brake
An assembly for positioning sheet metal on a sheet metal brake includes a coarse adjustment mechanism and a fine adjustment mechanism for respectively setting approximate and accurate positions of the sheet metal. Preferably, a mounting structure is removably mountable on front and rear beams of the brake via a pair of respective clamping mechanisms connected to respective mounting legs extending from a hollow tube. One mounting leg is movably connected to the tube for adjusting spacing between the mounting legs to facilitate mounting on the beams. A support arm is slidably received by the hollow tube to provide coarse adjustment. The support arm includes an upwardly extending portion on which is disposed a shelf for supporting an edge of the sheet metal. A threaded member threadably engages the upper portion of the support arm to finely adjust the position of the shelf and piece of sheet metal.
1. Technical Field
The invention relates generally to a sheet metal brake for bending sheet metal. More particularly, the invention relates to an assembly for setting the position of a piece of sheet metal on such a brake. Specifically, the invention relates to such an assembly having a sheet metal-engaging member which is adjustable with a coarse adjustment mechanism and a fine adjustment mechanism.
2. Background Information
Sheet metal brakes are well known in the industry for the purpose of bending sheet metal. In order to bend the sheet metal at the proper location, it is necessary to make accurate measurements and set the piece of sheet metal in a position in accordance with such measurements on the sheet metal brake. A problem arises in setting the position of the sheet metal on the brake, particularly when only one person is operating the sheet metal brake and even more particularly if the piece of sheet metal is relatively large. It has been found somewhat helpful to use a support arm having a coarse adjustment mechanism whereby the support arm supports an edge of the piece of sheet metal and is able to assist in setting the position of the sheet metal generally in the desired position. However, such a coarse adjustment mechanism by itself is still lacking in order to make the process expeditious.
In addition, many sheet metal brakes have no adjustment mechanism at all. Thus, there is a need for such an adjustment mechanism which can be retrofit onto existing sheet metal brakes and which can be used with stationary or portable brakes.
BRIEF SUMMARY OF THE INVENTIONThe present invention provides an apparatus for use with a sheet metal brake having a front and a rear and defining an axial direction extending from the front to the rear, the apparatus comprising a movable sheet metal-engaging member adapted to move in the axial direction when used with the sheet metal brake; the sheet metal-engaging member being adapted to facilitate positioning of a piece of sheet metal on the brake in the axial direction; and a fine adjustment mechanism for moving the sheet metal-engaging member in the axial direction to a desired position.
The present invention also provides a sheet metal-positioning assembly for use with a sheet metal brake, the assembly comprising a mounting structure adapted to mount on the sheet metal brake; the mounting structure including a pair of spaced upwardly extending mounting legs; a mounting mechanism mounted on each mounting leg and adapted to mount the respective leg to the brake; a support arm having an elongated first portion and an upwardly extending portion mounted on the first portion; the elongated first portion selectively movably engaging the mounting structure to provide coarse adjustment of the support arm; a sheet metal-engaging member movably mounted on the upwardly extending portion of the support arm and adapted to facilitate positioning of a piece of sheet metal on the brake at a desired location; and a fine adjustment mechanism mounted on the upwardly extending portion of the support arm for moving the sheet metal-engaging member to a desired position.
The present invention further provides a sheet metal-positioning assembly for use with a sheet metal brake, the assembly comprising a mounting structure adapted to mount on the sheet metal brake; an adjustable member selectively movably engaging the mounting structure; the adjustable member including an upwardly extending portion; a coarse adjustment mechanism to provide coarse adjustment of the adjustable member; a first securing mechanism for selectively securing the adjustable member at a selected position; a sheet metal-engaging member movably mounted on the upwardly extending portion of the adjustable member and adapted to facilitate positioning of a piece of sheet metal on the brake at a desired location; a fine adjustment mechanism mounted on the upwardly extending portion of the adjustable member for moving the sheet metal-engaging member to a desired position; and a second securing mechanism for securing the sheet metal-engaging member at the desired position.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Similar numbers refer to similar parts throughout the specification.
DETAILED DESCRIPTION OF THE INVENTION The adjustable assembly of the present invention is indicated generally at 10 in
Brake 12 is rigidly positioned on a stand 16, which may be a permanent or portable structure. Portable stands typically include at least a pair of wheels (not shown) to facilitate mobility of the stand and brake thereon. A variety of stands are known in the art for supporting brakes such as brake 12.
With reference to
A mechanism 42 for lowering pivot arm 34 and anvil 38 into a clamping position includes a lock bar 44 and a lock bar handle 46 extending therefrom. Lock bar 44 is pivotally connected to each C-casting 30 at a pivot 48 and pivotally connected to each pivot member 34 via pivots 50 and 52. A clamping base 54 is connected to front beam 26 and is disposed below anvil 38. Clamping base 54 is elongated in the longitudinal direction. A bending bar 56 is pivotally connected via a hinge 58 to clamping base 54 and is elongated in the longitudinal direction. A pair of bending bar handles 60 extend from bending bar 56.
In accordance with a feature of the invention and with reference to
A first mounting member or leg 70 and a rear mounting member or leg 72 spaced from leg 70 each project upwardly from tube 66 and are substantially perpendicular to tube 66. A front clamping mechanism 74 is mounted on leg 70 and a rear clamping mechanism 76 is mounted on rear leg 72. Preferably, front mounting leg 70 includes a lower member or bar 78 extending from and rigidly connected to tube 66 and an upper member or bar 80 adjustably connected to lower bar 78. In the exemplary embodiment, upper member 80 is removably connected to lower member 78 via a fastener such as a threaded bolt 82 and nut 84 with bolt 82 extending through a hole 86 formed in upper bar 80 and a hole 88 (
Front clamping mechanism 74 is configured to mount front mounting leg 70 to front beam 26 of brake 12 (
Similar to front leg 70 and with reference to
Rear clamping mechanism 76 includes a lower jaw 114 and an upper jaw 116 spaced from and disposed above jaw 114, each of jaws 114 and 116 extending from and connected to upper bar 102. Jaws 114 and 116 extend rearwardly with respect to brake 12 and define therebetween a rear throat 117 which opens toward rear 20 of brake 12. Thus, rear clamping mechanism 76 includes a portion of upper bar 102. Mechanism 76 further includes an engagement member in the form of a threaded member 118 having a handle 120 thereon to facilitate rotation of member 118. Threaded member 118 threadedly engages a threaded hole 122 (
Referring to
Assembly 10 further includes a forward securing or locking mechanism 138 (
With reference to
In accordance with another feature of the invention, a fine adjusting mechanism 160 (
Fine adjustment mechanism 160 further includes a threaded member 172 with a handle 174 attached thereto to facilitate the rotation of member 172. Threaded member 172 is threadably engaged with a threaded hole 176 (
To mount assembly 10 on brake 12, front clamping mechanism 74 is positioned to receive front member 26 therein (
The operation of assembly 10 and brake 12 is now described with reference to
As shown in
Once assemblies 10 have been adjusted to accurately position piece 14 of sheet metal on brake 12, brake 12 clamps piece 14 of sheet metal in place as shown in
Thus, assembly 10 provides a simple structure for accurately setting the position of a piece of sheet metal on a sheet metal brake. It will be appreciated that a variety of changes may be made to assembly 10 that are within the scope of the present invention. The broader concept of the present invention is the ability to finely and accurately position the piece of sheet metal on the sheet metal brake. A variety of mechanisms may be used to provide this type of adjustment. For example, the fine adjustment may be provided by a mechanism using engageable gears or rollers. Instead of the pivoting movement sheet metal-engaging member 162, an analogous member may be slidably or rollably mounted on an adjustable member such as support arm 64. Moreover, the assembly need not necessarily include a coarse adjustment mechanism. Indeed, for some applications, the use of a fine adjustment mechanism on a mounting structure without a moveable arm or analogous coarse adjustment mechanism may be suitable. In addition, the various options for moving an adjustable member such as support arm 64 may be suitable as the fine adjustment mechanism without the inclusion of a separate coarse adjustment mechanism. For example, a gear and track combination wherein a tooth gear engages teeth of a flat track to move a member such as support arm 64 may be used in this fashion. An adjustment member such as support arm 64 may also roll on rollers or ball bearings instead of simply sliding within a hollow tube such as tube 66 to facilitate smooth and easy movement. However, assembly 10 provides a simple and inexpensive mechanism for providing the coarse and fine adjustment mechanisms. In general, it is preferred to have both the fine and coarse adjustment mechanisms so that the coarse adjustment mechanism can quickly set the approximate location of the adjustable member and the fine adjustment mechanism can then accurately set the position of the sheet metal with relatively minor adjustment.
As previously discussed, mounting members 70 and 72 are vertically adjustable to allow assembly 10 to be used with sheet metal brakes having different dimensions. More particularly, this allows support arm 64 and shelf 170 to be set at the proper height for placement of the sheet metal thereon and would typically make the top of shelf 70 approximately the same height as the clamping base 54 or analogous structure on another sheet metal brake. The vertical adjustment of mounting members 70 and 72 is provided by a pair of holes in the respective lower members 78 and 100 such that bolts 82 and 104 may respectively be received in these lower holes to adjust the height of arm 64 and shelf 170 upwardly. This vertical adjustment can be done by any other suitable means. For instance, instead of a pair of holes in the lower members, an elongated slot may be used. The use of the pair of holes in the exemplary embodiment is due to the fact that there are currently two primary manufacturers of sheet metal brakes in the United States, each a manufacturer using standard dimensions which differ from one another.
Assembly 10 is configured to mount on the sheet metal brake itself and in particular, on the front and rear beams thereof. However, it is contemplated that the assembly may be mounted on other portions of the sheet metal brake, such as the C-castings or alternately on the stand on which the sheet metal brake sits. It is nonetheless most preferable to have the assembly connected directly to the sheet metal brake, as this provides a simpler and more sturdy connection for the assembly. Other changes may be made to the present invention that would be recognized by one skilled in the art.
In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed.
Moreover, the description and illustration of the invention is an example and the invention is not limited to the exact details shown or described.
Claims
1. An apparatus for use with a sheet metal brake having a front and a rear and defining an axial direction extending from the front to the rear, the apparatus comprising:
- a movable sheet metal-engaging member adapted to move in the axial direction when used with the sheet metal brake; the sheet metal-engaging member being adapted to facilitate positioning of a piece of sheet metal on the brake in the axial direction; and
- a fine adjustment mechanism for moving the sheet metal-engaging member in the axial direction to a desired position.
2. The apparatus of claim 1 further including a coarse adjustment mechanism for moving the sheet metal-engaging member in the axial direction to a position adjacent the desired position.
3. The apparatus of claim 2 wherein the coarse adjustment mechanism includes an adjustable member adapted to move in the axial direction when used with the sheet metal brake; and wherein the sheet metal-engaging member is movably mounted on the adjustable member.
4. The apparatus of claim 3 wherein the fine adjustment mechanism includes a threaded member which threadably engages the adjustable member to move the sheet metal-engaging member.
5. The apparatus of claim 4 wherein the sheet metal-engaging member is pivotally connected to the adjustable member.
6. The apparatus of claim 3 further including a mounting structure adapted to mount on the sheet metal brake; and wherein the adjustable member is movably mounted on the mounting structure.
7. The apparatus of claim 6 wherein the adjustable member includes an elongated portion which in use with the brake is elongated in the axial direction; wherein the adjustable member includes an upwardly extending portion mounted on the elongated portion and having an upper end; and wherein the sheet metal-engaging member is movably mounted on the upwardly extending portion adjacent the upper end thereof.
8. The apparatus of claim 7 wherein the elongated portion of the adjustable member selectively slidably engages the mounting structure.
9. The apparatus of claim 8 wherein the mounting structure defines an interior chamber within which the elongated portion of the adjustable member is selectively slidably received.
10. The apparatus of claim 1 further including a structure adapted to be positioned in fixed relation with respect to the sheet metal brake while in use therewith; and wherein the sheet metal-engaging member is movably mounted on the structure.
11. The apparatus of claim 10 wherein the structure is adapted to be removably mountable on the brake.
12. The apparatus of claim 10 wherein the structure is adapted to mount on the sheet metal brake.
13. The apparatus of claim 12 wherein the structure includes at least one mounting mechanism adapted to mount on the brake.
14. The apparatus of claim 13 wherein the at least one mounting mechanism includes a clamping mechanism adapted to clamp to the brake.
15. The apparatus of claim 13 wherein the at least one mounting mechanism includes first and second mounting mechanisms which are movable with respect to one another in the axial direction to selectively adjust spacing between the first and second mounting mechanisms.
16. The apparatus of claim 12 wherein the structure includes a pair of mounting members adapted to mount on the brake; and wherein each of the mounting members is vertically adjustable to adjust the height of the sheet metal-engaging member.
17. The apparatus of claim 12 wherein the structure is adapted for mounting on spaced front and rear elongated beams of the sheet metal brake.
18. The apparatus of claim 17 wherein the rigid structure includes a front mounting member adapted for mounting on the front beam and a rear mounting member adapted for mounting on the rear beam.
19. The apparatus of claim 18 wherein spacing between the front and rear mounting members is adjustable whereby the structure is adapted to generally align the front and rear mounting members respectively with the front and rear beams.
20. The apparatus of claim 19 wherein a front clamping mechanism is mounted on the front mounting member and a rear clamping mechanism is mounted on the rear mounting member; wherein the front clamping mechanism has a front throat adapted to open toward a front of the brake with the front beam of the brake receivable therein; and wherein the rear clamping mechanism has a rear throat adapted to open toward the rear of the brake with the rear beam of the brake receivable therein.
21. The apparatus of claim 1 wherein the sheet metal-engaging member is vertically adjustable whereby the sheet metal-engaging member is adapted to engage the piece of sheet metal at a height suited to dimensions of the sheet metal brake.
22. A sheet metal-positioning assembly for use with a sheet metal brake, the assembly comprising:
- a mounting structure adapted to mount on the sheet metal brake; the mounting structure including a pair of spaced upwardly extending mounting legs;
- a mounting mechanism mounted on each mounting leg and adapted to mount the respective leg to the brake;
- a support arm having an elongated first portion and an upwardly extending portion mounted on the first portion; the elongated first portion selectively movably engaging the mounting structure to provide coarse adjustment of the support arm;
- a sheet metal-engaging member movably mounted on the upwardly extending portion of the support arm and adapted to facilitate positioning of a piece of sheet metal on the brake at a desired location; and
- a fine adjustment mechanism mounted on the upwardly extending portion of the support arm for moving the sheet metal-engaging member to a desired position.
23. A sheet metal-positioning assembly for use with a sheet metal brake, the assembly comprising:
- a mounting structure adapted to mount on the sheet metal brake;
- an adjustable member selectively movably engaging the mounting structure; the adjustable member including an upwardly extending portion;
- a coarse adjustment mechanism to provide coarse adjustment of the adjustable member;
- a first securing mechanism for selectively securing the adjustable member at a selected position;
- a sheet metal-engaging member movably mounted on the upwardly extending portion of the adjustable member and adapted to facilitate positioning of a piece of sheet metal on the brake at a desired location;
- a fine adjustment mechanism mounted on the upwardly extending portion of the adjustable member for moving the sheet metal-engaging member to a desired position; and
- a second securing mechanism for securing the sheet metal-engaging member at the desired position.
Type: Application
Filed: Oct 14, 2004
Publication Date: Apr 27, 2006
Inventor: John Yoder (Millersburg, OH)
Application Number: 10/965,340
International Classification: B21D 11/00 (20060101);