Tool holder assembly, and seating / fixing components and starting system therefor.

Abstract

A tool holder assembly, and an insert body and activation system used with the assembly. The insert body of the tool holder assembly may be configured to shift as needed to engage with the fixture when the assembly is activated. In some cases, the insert body may be configured to shift further to engage better with the fixture. The activation system may be electrically operated.

Description

Technical Field

[0001] (Related Applications) This application is a new PCT international application that claims priority to U.S. Patent Application No. 18 / 533,126, filed December 7, 2023, and U.S. Patent Application No. 18 / 331,158, filed June 7, 2023, and claims priority to U.S. Provisional Patent Application No. 63 / 350,410, filed June 8, 2022, and the teachings of each of these patent applications are hereby incorporated by reference.

[0002] (Field of the Invention) The present invention relates to tool holder assemblies for use with industrial machines or equipment, as well as seating / fixing components and activation systems for such assemblies.

Background Art

[0003] Sheet metal and other workpieces can be processed into a wide range of useful products. Commonly used processing (i.e., manufacturing) processes involve bending, folding, and / or forming holes in sheet metal and other workpieces. Equipment used in such processes includes many types such as turret presses and other industrial presses (such as single-station presses), Trumpf-type machines and other rail-type systems, press brakes, sheet feeding systems, coil feeding systems, and other types of processing equipment adapted to punch or press sheet materials.

[0004] Regarding press brakes, they are generally used to deform metal workpieces and are equipped with a lower beam (or table) and an upper beam (or table). One beam (typically the upper beam) is configured to move perpendicularly toward the other beam. A forming tool is mounted on the beam, and when one beam is moved toward the other, a workpiece positioned between the beams can be formed, for example, bent into the desired shape. Typically, the upper beam is configured to hold a male forming tool (punch) with a bottom workpiece deformation surface (such as a V-shaped surface), and the lower beam is configured to hold a female tool (die) of the appropriate shape with an upper surface perpendicularly aligned with the workpiece deformation surface of the male tool.

[0005] As is known, forming tools are generally mounted on a press brake beam using one or more tool holders provided on the beam. In particular, the upper portion of the tool, commonly referred to as the tang or shank, is inserted between opposing walls of the holder, and these walls are configured to form a channel into which the tool tang can be secured. Very often, the channel is defined by a stationary portion of the tool holder and opposing movable portions of the holder.

[0006] Designing tool holders for industrial machinery, such as press brakes, requires consideration of numerous factors. One factor is particularly related to variability regarding the various tooling styles that can be used, each potentially having different tang profiles. For example, the surface or extent of the tang extending upward from the tool safety slot can be straight (substantially perpendicular), beveled (at an angle from the perpendicular), or curved. Some tool holders designed for press brake applications, for instance, are configured to require the use of adapters. While a viable solution for accommodating different tang styles, adapters require proper positioning and / or maintenance. In addition, adapters may need to be moved by different distances to accommodate different tang styles. These different movements typically require precise force adjustments, otherwise damage to the tang and / or tool holder from contact with the adapter can occur. Such adjustments have traditionally been provided via hydraulic, pneumatic, electrical, or other similar means, thereby allowing for precise control of the applied force. However, the incorporation of adjustment elements adds complexity and overall cost to the design.

[0007] Another factor to consider when designing tool holders is tolerances. There may be slight variations in each tool and tool holder design, such as the general dimensions of the tool (e.g., its tang) or the operation of the tool holder (e.g., the closing motion of one or more movable parts of the holder). While these variations may be negligible when considered separately, when encountered collectively, such as in the context of loading forming tools into tool holders, such variations can result in a corresponding degree of play for the fixture. To account for such variations, some tool holders have incorporated structures such as shape memory materials or springs to compensate for tolerances in these areas. However, even with these elements, problems of looseness or play between the tool and holder can still arise over time, often due to wear. Furthermore, such shape memory materials or structures may require periodic maintenance or replacement.

[0008] Further factors to consider when designing a tool holder relate to its machining and use. Regarding machining, if the tool holder is guaranteed for both new and retrofit designs, particularly for press brake applications, the holder design should be able to be configured / adapted to different lengths as needed, while also having some form of mounting system that is easily adaptable to its installation. Regarding the use of the holder, the issue can focus on how the holder is activated and how that activation is divided / controlled across the tool holder. As already discussed, the activation force should provide sufficient fixation of the fixture but not excessively so as to cause concern about damage to the holder and / or tool. In addition, the activation force may need to be adjusted based on the length of the tool holder being used / activated and the type of fixture being fixed. While it is possible to incorporate such adjustment elements into the tool holder design, this adds further complexity and overall cost to the design.

[0009] Therefore, there remains room for a tool holder assembly that can effectively and efficiently solve the aforementioned problems and other issues, thereby providing a superior holder design. [Overview of the project]

[0010] Embodiments of the present invention include a tool holder assembly, and insert bodies and activation systems used therewith. In some cases, the insert bodies of the tool holder assembly are configured to shift as needed to engage with a fixture when the assembly is activated. For example, the insert bodies can pivot in correspondence based on the shape of the tang of the fixture and the orientation in which the body can best engage with the tang. The insert bodies may have one or more fingers. In some cases, the fixture to be engaged may be one or more tools, thereby allowing each tang of the tool to be engaged by one or more of the fingers of the insert body. In some embodiments, the tool holder assembly is electrically activated. In some cases, the tool holder assembly is formed integrally with a single insert body and configured to activate a single insert body. In other cases, the tool holder assembly may be formed with multiple insert bodies and configured to activate multiple insert bodies, thereby allowing the insert bodies to be activated collectively or independently. In both cases, multiple tool holder assemblies may be joined adaptively to form tool holders for one or both of the upper and lower beams of a press brake. In such cases, the range of tool holders can be defined accordingly based on the machine size. Following the setup, a selected quantity of tool holder assemblies provided across the beam can be used as needed, based on the intended machining job and the fixtures required for it.

[0011] In one embodiment, a tool holder assembly is provided. The assembly includes a stationary portion having vertical sidewalls that partially define a tool channel, one or more movable portions located opposite the vertical sidewalls of the stationary portion, and an electrically activated system to which the one or more movable portions are operably connected. The electrically activated system includes one or more modules. At least one of the modules is connected to one of the movable portions via an output shaft, thereby allowing at least one module to be removed from the tool holder assembly by removing the output shaft from one of the movable portions in the event of failure.

[0012] In another embodiment, a tool holder assembly is provided. The assembly includes a stationary portion having vertical sidewalls that partially define a tool channel, a movable portion positioned opposite the vertical sidewalls of the stationary portion, an activation system to which the movable portion is operably connected, and when the system is activated, the movable portion is moved relative to the tool channel, resulting in a locked engagement with the fixture when loaded into the channel, and at least two illumination devices. The illumination devices are provided for one or more of the following: illuminating a machining area adjacent to the tool channel, and signaling the status of the current use of the movable portion and one or more machining operations scheduled for the movable portion.

[0013] In a further embodiment, a press brake machine is provided. This machine includes an upper beam and a lower beam, and a holder assembly mounted on one end of either the upper beam or the lower beam. One end of either the upper beam or the lower beam is formed to interface and engage with the mounting surface of the holder assembly. [Brief explanation of the drawing]

[0014] The following drawings illustrate specific embodiments of the present invention and are not intended to limit the scope of the invention. The drawings are not necessarily to scale (unless otherwise stated) and are intended to be used in conjunction with the descriptions in the following detailed description. Embodiments of the present invention are described below in conjunction with the accompanying drawings, and similar reference numerals represent similar elements. [Figure 1] This is a cross-sectional view of a tool holder assembly according to a particular embodiment of the present invention, the holder assembly shown in a closed configuration, connected to an exemplary adapter, with an exemplary forming tool loaded therein, viewed along line II in Figure 5A. [Figure 2A] This is a rear view of the insert body shown in an exemplary use according to a particular embodiment of the present invention. [Figure 2B] This is a front view of the insert body according to a specific embodiment of the present invention, as shown in Figure 2A. [Figure 2C] This is a front view of a further insert body according to a particular embodiment of the present invention. [Figure 2D] Figure 2C is a front perspective partially exploded view of the electrically activated system and insert body according to a specific embodiment of the present invention. [Figure 2E] Figure 2D is a rear perspective view of the electrically activated system and the insert body in a partially exploded view. [Figure 3A] This is a cross-sectional view of a tool holder assembly according to a particular embodiment of the present invention, the holder assembly is shown in an open configuration and connected to an exemplary adapter, viewed along line IIIA-IIIA in Figure 5A. [Figure 3B] Figure 3A is an alternative diagram of the tool holder assembly, where the holder assembly is shown in a closed configuration. [Figure 4] This is an alternative diagram of the tool holder assembly in Figure 1, where the holder assembly is shown in an open configuration. [Figure 5A] This is an upper rear perspective view of a tool holder assembly configuration according to a specific embodiment of the present invention. [Figure 5B]It is a top front perspective view of the assembly configuration of FIG. 5A. [Figure 5C] It is a front view of the assembly configuration of FIG. 5A. [Figure 5D] It is a bottom view of the assembly configuration of FIG. 5A. [Figure 5D(i)] It is a front perspective view of the tool holder assembly of FIG. 5A according to a particular embodiment of the present invention. [Figure 5D(ii)] It is a front perspective view of the tool holder assembly of FIG. 5A according to a particular embodiment of the present invention. [Figure 5E(i)] It is a bottom perspective view of a further tool holder assembly according to a particular embodiment of the present invention. [Figure 5E(ii)] It is a bottom perspective view of a further tool holder assembly according to a particular embodiment of the present invention. [Figure 5F(i)] It is a front perspective view of another tool holder assembly according to a particular embodiment of the present invention. [Figure 5F(ii)] It is a front perspective view of another tool holder assembly according to a particular embodiment of the present invention. [Figure 5G(i)] It is a front perspective view and a rear perspective view of a press brake machine representing an electrical system related to a lighting device for a tool holder assembly for a press brake machine according to a particular embodiment of the present invention. [Figure 5G(ii)] It is a front perspective view and a rear perspective view of a press brake machine representing an electrical system related to a lighting device for a tool holder assembly for a press brake machine according to a particular embodiment of the present invention. [Figure 5H] It is an exemplary electrical circuit diagram of the system depicted in FIGS. 5G(i) and 5G(ii). [Figure 6A] It is a top rear perspective view of a further tool holder assembly configuration according to a particular embodiment of the present invention. [Figure 6B] It is a top front perspective view of the assembly configuration of FIG. 6A. [Figure 6C] It is a front view of the assembly configuration of FIG. 6A. [Figure 6D]Figure 6A is a bottom view of the assembly configuration. [Figure 7A] Figure 7C shows a cross-sectional view of a further tool holder assembly according to a particular embodiment of the present invention, the holder assembly being shown in an open configuration along line VIIA-VIIA. [Figure 7B] Figure 7A is an alternative diagram of the tool holder assembly, where the holder assembly is shown in a closed configuration. [Figure 7C] Figure 7A is a top rear perspective view of the tool holder assembly. [Figure 7D] Figure 7A is a top front perspective view of the tool holder assembly. [Figure 8A] This is a front perspective view of another tool holder assembly according to a particular embodiment of the present invention. [Figure 8B] Figure 8A is a rear perspective view of the tool holder assembly. [Figure 9] This is a front perspective view of an exemplary beam adapter according to a particular embodiment of the present invention. [Figure 10A] This is a front perspective view of an exemplary mounting configuration for grouping the tool holder assembly of Figure 8A, as mounted on the beam adapter of Figure 9, according to a particular embodiment of the present invention. [Figure 10B] This is a front perspective view of an exemplary mounting configuration for grouping the tool holder assembly of Figure 8A, as mounted on the beam adapter of Figure 9, according to a particular embodiment of the present invention. [Figure 11A] This is a front perspective view of one mounting configuration for the tool holder assembly shown in Figure 8A on the upper beam of a press brake, according to a particular embodiment of the present invention. [Figure 11B] This is a front perspective view of one mounting configuration for the tool holder assembly shown in Figure 8A on the upper beam of a press brake, according to a particular embodiment of the present invention. [Figure 12] This is a front perspective view of a further mounting configuration for the tool holder assembly of Figure 8A on the upper beam of a press brake, according to a particular embodiment of the present invention. [Figure 13A]This is a front perspective view of an exemplary configuration of an upper beam to which the tool holder assembly shown in Figure 8A can be connected, according to a particular embodiment of the present invention. [Figure 13B] This is a front perspective view of an exemplary configuration of an upper beam to which the tool holder assembly shown in Figure 8A can be connected, according to a particular embodiment of the present invention. [Figure 13C] This is a front perspective view of an exemplary configuration of an upper beam to which the tool holder assembly shown in Figure 8A can be connected, according to a particular embodiment of the present invention. [Figure 14] This is a front perspective view of a mounting configuration for a holder assembly on the lower beam of a press brake, according to a particular embodiment of the present invention. [Figure 15A] This is a front perspective view of an exemplary configuration of a lower beam to which a holder assembly can be connected, according to a particular embodiment of the present invention. [Figure 15B] This is a front perspective view of an exemplary configuration of a lower beam to which a holder assembly can be connected, according to a particular embodiment of the present invention. [Figure 15C] This is a front perspective view of an exemplary configuration of a lower beam to which a holder assembly can be connected, according to a particular embodiment of the present invention. [Modes for carrying out the invention]

[0015] The following detailed description is essentially illustrative and is not intended to limit in any way the scope, applicability, or configuration of the present invention. Rather, the following description provides several practical examples for implementing exemplary embodiments of the present invention. Examples of structure, materials, dimensions, and manufacturing processes are provided for selected elements, while other elements utilize those known to those skilled in the art of the present invention. Those skilled in the art will recognize that many of the embodiments described have various preferred alternatives.

[0016] Figure 1 shows a cross-sectional view of a tool holder assembly 100 according to a particular embodiment of the present invention. The holder assembly 100 is shown with an exemplary forming tool 102, which is loaded therein and coupled to an exemplary adapter 104 for coupling to a press brake (upper) beam (not shown). While the embodiments described herein are applicable to a wide variety of tool styles such as US, European, Bystronic, and Trumpf / Wilson Tool, it should be understood that the clamp will function predictably similarly with other tool styles / tang types. In addition, although the embodiments described herein are depicted with respect to a press brake upper beam, the present invention is also applicable to a press brake lower beam. Furthermore, while the assembly 100 can be operably coupled to a press brake beam via the adapter 104 as illustrated, various other adapters and / or configurations (such as Z1 or Z2 for Euro-style beams, or a Universal Bolt Pattern (UBP) for direct mounting to an OEM upper beam) may be used as alternatives. As a further alternative, the assembly 100 may have an integrated coupling for joining with the press brake beam, and thus may be configured not to require a separate adapter for such coupling. In a further embodiment, the holder assembly 100 can be used with other industrial machinery. For example, the tool holder assembly 100 can be used with a machine configured to provide any of the various forming processes such as bending, folding, and / or forming holes in sheet metal and other workpieces.

[0017] Continuing to refer to Figure 1, the illustrated tool holder assembly 100 has two main components used to seat and secure a jig or fixture in the assembly 100: a stationary portion 106 and one or more movable portions. In a particular embodiment, the stationary portion 106 is defined by a vertical side wall that at least partially defines the tool channel 101a. In the vertical use, those skilled in the art will understand that the wall may be substantially vertical, and even if slightly inclined or curved, it has a substantially vertical shape. One of the movable portions is an insert body 108. For further details regarding a first exemplary design of such an insert body 108, we look to Figures 2A and 2B illustrating rear and front perspective views of the design (with Figure 2A showing the insert body 108 in an exemplary use which will be detailed later herein). Continuing to refer to Figures 2A and 2B, in a particular embodiment, the insert body 108 has a base portion and at least one finger. In a more preferred embodiment, the body 108 has two or more fingers. To this end, the insert body 108 is illustrated together with the base portion 108d and the first fingers 108a and the second fingers 108b. In certain embodiments, as shown, the base portion 108d has a substantially triangular configuration, and the fingers 108a and 108b are configured to protrude from the base portion 108d. In certain embodiments, as shown, the fingers 108a and 108b are offset so as to extend along different axes A1 and A2 (e.g., elongated along them). In certain embodiments, as shown, axes A1 and A2 can be parallel, but the present invention should not be limited in this way. For example, one or more of the fingers 108a and 108 can protrude from the base portion 108d at an angle inward or outward with respect to the vertical midline M of the insert M. As shown, the vertical midpoints M1 and M2 of fingers 108a and 108b may be separated by angle A, the vertex of which lies at pivot point PP (described later) along the vertical midline M of the insert.When using the insert body 108, the fingers 108a and 108b can contact and engage at different points across the fixture loaded in the tool channel 100a. In particular, the fingers 108a and 108b of the insert body 108 are designed to extend at different points from the insert body 108 in order to achieve more effective engagement with the fixture. For example, the contact points (or locations) made by each of the two fingers 108a and 108b can be distinct, and each finger forms its own distinct engagement relationship with the fixture. Thus, the engagement with the fixture may be purer on one finger than on the other due to the tolerances of the fixture. Therefore, by offsetting the fingers 108a and 108b from each other, first and second opportunities are obtained to establish better engagement with the fixture.

[0018] Continuing to refer to Figures 2A / 2B, the separation angle between the midpoints M1 and M2 of fingers 108a and 108b with respect to the pivot point PP can be selectively selected based on the intended use of the tool holder assembly 100. Ideally, the separation angle A is as close to 180° as possible. However, the insert body 108 can function advantageously with separation angles less than 180°. In certain embodiments, angle A can be in the range of about 35° to about 120°. In more preferred embodiments, angle A can be in the range of about 50° to about 100°, and in even more preferred embodiments, angle A can be in the range of about 60° to about 80°. In certain embodiments, the insert body may include three or more fingers with an angle separation between each adjacent pair. For example, in the case of an insert body with three fingers, there is a first angle between the first outer finger and the middle finger, and a second angle between the middle finger and the second outer finger. In the case of three or more fingers, the sum of the separation angles between the fingers should ideally be as close to 180° as possible. However, the insert body 108 can function advantageously with separation angles less than 180° in total. For example, in a design with three fingers, the first and second angles between the first and second fingers, and between the second and third fingers, can be the same if desired, however, the present invention is not limited thereto. Depending on the fixture to which it is fixed, it may be preferable to have different angles relative to such first and second angles.

[0019] Moving on to Figure 2C, a further exemplary design of the insert body 109 is illustrated. Although not shown in the tool holder assembly 100 of Figure 1, the assembly 100 can be configured to work with the insert body 109. The insert body 109 has many similarities to the insert body 108 of Figures 2A / 2B, and includes, for example, a plurality of fingers (e.g., first finger 109a and second finger 109b) protruding from the base portion 109d to extend along axes A1' and A2' to contact / engage at different points across the tool when loaded into the tool channel of a tool assembly such as the assembly 100 of Figure 1. In a particular embodiment as shown, the fingers 109a, 109b are offset from each other (e.g., spaced apart), allowing for distinct contact points or locations (and effective engagement with the tool) through each of the fingers. Similar to the insert body 108 in Figures 2A / 2B, axes A1' and A2' can be parallel, but the present invention should not be limited in this way.

[0020] Continuing with respect to the insert body 109 in Figure 2C, the insert body also has a roughly triangular configuration, but has a reduced external shape compared to the insert body 108 in Figures 2A / 2B. Therefore, the central bore 109c defined within the base portion 109d is located at a lower height B' (measured from the bottom of the insert body 109) and is thus closer to the fingers 109a and 109b of the insert body 109. As a result, the separation angle A' between the central vertical centerlines M1' and M2' of the fingers 109a and 109b (the apex of the angle is at the pivot point PP along the vertical centerline M' of the insert body 109) is greater than the separation angle A of the insert body 108 in Figures 2A / 2B. Ideally, the separation angle A' is as close to 180° as possible. However, the insert body 109 can function favorably with separation angles less than 180°. In certain embodiments, the angle A can be in the range of about 105° to about 175°. In a more preferred embodiment, angle A can be in the range of approximately 125° to approximately 160°, and in an even more preferred embodiment, angle A can be in the range of approximately 140° to approximately 150°. It should be understood that as this separation angle increases, the distance between the vertical centerlines of the fingers 109a and 109b increases. Increasing this distance provides a more compact design for the insert body 109 and further counteracts overall play or looseness between the insert body 109 and the fixture in the holder through more reliable force transmission from the insert body 109 across its fingers 109a and 109b onto the fixture.

[0021] Similar to the insert body 108 in Figures 2A / 2B, the insert body 109 in Figure 2C may have three or more fingers, with an angular separation between each adjacent pair of fingers. For example, in the case of an insert body with three fingers, there is a first angle between the first outer finger and the middle finger, and a second angle between the middle finger and the second outer finger. Ideally, the sum of the separation angles should be as close to 180° as possible. However, the insert body 109 can function advantageously with separation angles less than 180° in total. The first and second angles may be the same if desired, however, the present invention is not limited in this respect. For example, depending on the fixture to which it is fixed, it may be preferable to have different angles relative to such first and second angles.

[0022] Returning to Figure 1 (and as already mentioned), either the insert body 108 of Figure 2A / Figure 2B or the insert body 109 of Figure 2C can be used with it. To that end, referring to Figure 2A, the insert body 108 is positioned within the pocket (or cavity) 100b of the tool holder 100. When activated, the insert body 108 (or 109) is moved in a first direction to a shallower position within the pocket 100b, for example, toward and into (or further into) the tool channel 100a of the holder assembly 100. As a result of this movement, as shown in Figure 1 for the insert body 108, its fingers 108a, 108b extend into the tool channel 100a and engage with one or more tongues 102a of the tool 102 loaded into the channel 100a. Although the finger 108a is not shown in Figure 1, the fingers 108a, 108b can be configured to be similar in shape and length. Therefore, the distal ends (or “tool engagement ends”) 108a', 108b' of the fingers 108a, 108b are respectively sized and molded to be received in corresponding grooves 102b defined within the tool tongue 102a and to engage with it. When activated, the insert body 108 is moved toward (and into, or further into) the tool channel 100a, and the distal ends 108a', 108b' of the fingers each enter (or move further into) the tool channel 100a and contact / engage with the tongue 102a of the tool 102 loaded therein. In a particular embodiment, each end 108a', 108b of the two fingers 102a, 108b has a tip region with an inclined surface configured to engage with the tool 102 when loaded within the tool channel 100a.

[0023] In a particular embodiment, the tool holder 100 has a length configured to extend along the length of the upper beam of the press brake, and the two tip regions 108a', 108b' of the two fingers 108a, 108b are spaced apart along the length of the tool holder. In relation to securing (or “clamping”) the tool 102 (and subsequently referring to the insert body 108), the process involves opposing sides of the tool tongue 102a being in contact with the stationary portion 106 and the corresponding surfaces of the insert body 108. Such contact collectively functions to securely clamp the tool 102 between the insert body 108 and the stationary portion 106. In a preferred embodiment, the securing and seating of the tool 102 in the tool channel 100a occurs simultaneously. However (as will be further detailed herein), seating the tool 102 involves vertically lifting the tongue 102a in the channel 100a so that one or more tongue top surfaces are in flush contact with one or more corresponding surfaces of the stationary portion 106. Once clamped and seated, the tool 102 is in a working position, meaning it does not require any further positioning steps before being used for its intended machining purpose. In this embodiment, clamping and seating preferably occur simultaneously (e.g., by a single movement of the insert body 108).

[0024] In a particular embodiment, as shown, the stationary portion 106 includes a lower wall 106a, a side wall 106b, and an upper wall 106c. The side wall 106b and the upper wall 106c boundary a tool channel 100a, which is configured to seat and secure a fixture within it. For example, a fixture can often be fixed (or "clamped") to the side wall 106b of the stationary portion 106, while the fixture can also be seated to one or more of the lower wall 106a and the upper wall 106c (as illustrated in Figure 1). As illustrated illustrative in Figure 1 (and also with reference to Figures 3A and 3B, which show diagrams of the tool holder assembly 100 in open / unclamped and closed / clamped configurations, respectively), the insert body 108 can be used in cooperation with the side walls 106b of the stationary portion 110 to fix (or "clamp") one or more forming tools 102 between them, and thus to the tool holder assembly 100. For seated fixtures, this is the function of the insert body 108 that remains pressed into a groove 102b defined within the tool tongue 102a. In certain embodiments, the distal ends 108a', 108b' of the fingers 108a, 108b of the insert body 108, respectively, have inclined upper surfaces (e.g., angled from horizontal), and thus they engage (e.g., cam-act) with the inclined upper surfaces bordering the groove 102b and exert force. Therefore, upon activation (and corresponding drive) of the insert body 108 into the tang groove 102b, the tool 102 is fixed against the side wall 106b and seated against the lower wall 106a, the upper wall 106c, or both, depending on the tool type 102.

[0025] Embodiments of the present invention relate to insert bodies used for fixing (or "clamping") and seating a tool within a tool holder assembly 100. As already described, insert body 108 of Figure 2A / 2B or insert body 109 of Figure 2C may be used, and when activated, are driven toward and into (or further into) the tool channel 100a to engage with the tool tongue 102a for fixing / seating purposes. In addition, insert bodies 108, 109 of Figures 2A / 2B and 2C, respectively, are preferably configured to shift orientation upon contact with and initial engagement with the tool tongue so that each has a favorable clamping / locking engagement with the tongue.

[0026] For example, the distal ends 108a', 108b' of the fingers 108a, 108b of insert body 108 (and similarly, the distal ends 109a', 109b' of the fingers 109a, 109b of insert body 109) can routinely be mated into tang grooves 102b of similar size, but if a particular groove 102b is of a different size, each insert body 108 and 109 is configured to shift as needed (along with the fingers 108a, 108b and 109a, 109b) to engage with the fixture when the assembly 100 is invoked. In certain embodiments, as further detailed herein, each insert body 108 and 109 can pivot in corresponding directions (based on the shape of the tang groove 102b of the fixture) to an orientation that allows the fingers 108a, 108b and 109a, 109b to best engage with the groove 102b. In some embodiments, such pivoting may involve rotation of the insert body relative to the tool 102, combined with movement in either an inward or outward direction from the groove 102b, depending on how the distal ends of the fingers 108a', 108b' and 109a', 109b' best lock-engage with the groove 102b.

[0027] As already mentioned with reference to Figure 1, the fixtures loaded into the tool channel 100a may be one or more tools 102, and the tang 102a of each tool 102 is engaged by one or more of the fingers 108a, 108b of the insert body 109 (or alternatively, by one or more fingers 109a, 109b of the insert body 108). To this end, depending on the amount of tools to be fixed / seated and the respective tang profiles of those tools, the insert body 108 (or body 109) may pivot slightly or more significantly from its default orientation to best fix / seate such tools. For example, as shown in Figure 2A, the insert body 108 engages with two tools 102' and 102''. However, the grooves 102b' and 102b'' of the respective tangs 102a' and 102a'' are not aligned, and the tang channel 102b' is higher than the other tang channel 102b''. Therefore, the insert body 108 can be rotated (for example, in a clockwise direction C as shown in the figure) such that the first finger 108a is housed in the upper channel 102b' of the tool 102' and the second finger 108b is housed in the lower channel 102b' of the other tool 102''. Returning to Figure 1, each of these engagements facilitates the advantageous fixing and seating of the tools 102' and 102''. Preferably, this is enhanced by the inclined profiles at the finger ends 108a', 108b', so that the ends still extend into the tongues 102a' and 102a'' and engage effectively. As already mentioned, the insert body 109 functions similarly when used alternately.

[0028] As described above, many different types of start / actuate systems (e.g., hydraulic, pneumatic, electric, mechanical, or other similar means) have been implemented over the years in conjunction with tool holder designs. Often, such systems result in excessive complexity and / or cost, especially when the start needs to be regulated. It should be understood that any of these start / actuate systems can be adapted for use with clamp assemblies, including the insert bodies 108 / 109 embodied herein.

[0029] In certain embodiments of the present invention, the tool holder assembly 100 is electrically actuated. Referring to Figure 3A, the tool holder assembly 100 can be constructed integrally with a single insert body (e.g., insert body 108 in Figure 2A / Figure 2B, or insert body 109 in Figure 2C, as shown) and configured to actuate the single insert body. The tool holder assembly 100 is shown in a non-clamp configuration, thereby the fingers 108a, 108b of the insert body 108 do not extend into the tool channel 100a. The electric start source or system 110, in certain embodiments, includes a DC motor 110a and a gearbox 110b having an output shaft 110c. Such DC motors are well known and are often configured with a corresponding gearbox as shown. By their design, the motor is equipped to operate at a certain voltage (e.g., 6V, 12V, or 24V) to provide a certain RPM, and the gearbox converts such a voltage to a specified RPM for the output shaft. Therefore, the speed and torque on the output shaft 110c depend on the internal configuration (or ratio) of the gearbox 110b. In a particular embodiment, the motor 110a has a worm gear coupled to the gearbox 110b and is configured to generate rotation of the output shaft 110c, which then generates the clamping force necessary to fix and seat the jig via the insert body 108. Exemplary parameters of the embodied configuration may include a 24V motor with a gearbox having a ratio of 600:1 such that the motor's 6000 RPM is converted by the gearbox to 10 RPM on the output shaft. It should be understood that other motor / gearbox configurations may be used as alternatives, and the designs described herein are provided for illustrative purposes only.Exemplary manufacturers of such motor / gearbox products include Fuzhou Bringsmart Intelligent Tech.Co.,Ltd. (Fuzhou, China, www.bringsmart.com), Shenzhen Jinshunlaite Motor Co.,Ltd. (Shenzen City, China, www.aslongdcmotor.com), and Need-for-Power Motor Co.,Ltd. (Shenzhen, China, www.nfpmotor.com).

[0030] Returning to Figures 2A / 2B and 2C, the fingers 108a, 108b and 109a, 109b of the insert bodies 108 and 109 shown therein are offset from each other (by being separated, branching, or both, for example, so that each of the illustrated insert bodies 108 and 109 has a roughly triangular shape. Referring to Figure 1, the fingers 108a, 108b of the insert body 108 protrude from the base of the body 108, and the apex or central region of the body 108 (e.g., the vertex or central region) is defined to receive and function with the threaded output shaft 110c of the electrical system 110. As shown in Figure 2C, the insert body 109 has a similar configuration. In a particular embodiment, each insert body 108, 109 is defined with threaded bores 108c, 109c, and the output shaft 110c of the electrical system 110 is correspondingly threaded (e.g., male threaded) such that the bore 108c is configured to screw in the shaft 110c. Preferably, the insert bodies 108, 109 (or movable parts) are configured to (a) move toward (and into, or further into) the tool channel 100a in response to rotation of the output shaft 110c in a first direction, and (b) move toward the tool channel 100a in response to rotation of the output shaft 110c in a second direction. The first and second directions are selected from clockwise and counterclockwise.

[0031] In certain embodiments, the output shaft 110c may be a single body extending from the gearbox 110b into the central bore 108c of the insert body 108 (or the central bore 109c of the insert body 109). Alternatively, referring to Figures 2D and 2E (as illustrated by the insert body 109), the output shaft may be designed to include multiple elements. For example, in certain embodiments as shown, the electric start system 110' has a gearbox 110b' configured with an output shaft 110c' including a male portion 111a and a female portion 111b that selectively mate to the insert body 109c. In certain embodiments, the male portion 111a of the output shaft has a shape that mates with an aperture 111c of a corresponding shape defined in the female portion 111b. In certain embodiments, as shown, the shape may be a multi-point star shape, such as a six-point star shape. Screw drives with such configurations are sometimes referred to as star drives. Certain commercially available drives with this property are sold under the trade name Torx. Herein, the reader should understand that such a male / female configuration allows for easy and efficient installation and / or replacement of the electric start system 110'. Further details regarding such installation / replacement will be covered later. In certain embodiments, the female portion 111b is defined by a male thread that mates in correspondence with the female thread of the central bore 109c of the insert body 109 (or the central bore 108c of the insert body 108).

[0032] Returning to Figures 3A and 3B, the activation of the electrical activation system 110 and the corresponding trigger for the insert body 108 are illustrated. While the combined function of system 110 and insert body 108 is detailed herein, it should be understood that the electrical system 110' and / or insert body 109 can be used as alternatives and will function similarly to those described for system 110 and insert body 108. When the electrical system 110 is activated, and as a result the threaded output shaft 110c rotates within the threaded bore 108c of the insert body 108, a corresponding forward movement of the insert body 108 occurs (e.g., toward and into or further into channel 100a). Such forward movement occurs by positioning the insert body 108 within the pocket 100b of the tool holder 100, thereby maintaining the orientation of the insert body 108, but allowing movement of the body 108 along the output shaft 110c as the output shaft 110c rotates. To that end, when the electrical system 110 is activated, the insert body 108 moves in a first direction toward the tool channel 100a. When the insert body 108 is advanced to contact the tang 102a of the fixture (when the fixture is received within the tool cavity 100a) so that the fingers 108a, 108b engage with the tang groove 102b, the fingers 108a, 108b are moved to move away from their initial engagement and orientation if they are not firmly engaged / clamped to the tool tang 102a.

[0033] As already described with reference to Figures 2A / 2B and 2C, the insert bodies 108 and 109 (and correspondingly their fingers 108a, 108b and 109a, 109b) can rotate relative to the shaft 110c, based on the space within the pocket 100b, until a secure engagement / clamping orientation is achieved. In certain embodiments, each insert body 108 / 109 has a limited degree of freedom to rotate both clockwise and counterclockwise around its pivot point PP / PP', such as 7 degrees or less, or 6 degrees or less, for example, 1 / 2 to 5 degrees, or 1 to 5 degrees. Essentially, this rotation or pivot of the insert bodies 108 and 109 corresponds to the pivoting of their fingers 108a, 108b and 109a, 109b, absorbing / compensating for tolerances (variations) for different tools that may be fitted into the tool cavity 100b. It should be understood that this rotation / pivot of the insert body 108 / 109 is made possible by a limited amount of tolerance between the outer circumference of the insert body 108 / 109 and the pocket 100b of the tool assembly 100. The size of such a pocket 100b can be varied, but it should have one or more wall surfaces defined to be close to, but at least at, the sides of the base portions 108d, 109d of the insert body 108, 109. This allows its overall orientation to be maintained when actuated via the output shaft 110c. As an alternative to having such a closely configured pocket 100b, two or more posts, shoulders, or other fasteners can be provided to allow only the desired limited degree of rotational freedom relative to the insert body.

[0034] Returning to Figures 2D and 2E, as described above, the electric starting system 110' is substantially the same as the electric system 110, except that the output shaft 110c' is selectively coupled to multiple elements, for example, the central bore 109c of the insert body 109c, and then includes male and female parts 111a and 111b that link together. For this purpose, the female part 111b may have a male thread that mates in correspondence with the female thread of the central bore 109c of the insert body 109 (or the central bore 108c of the insert body 108). In a particular embodiment as shown, the male thread of the female part 111b is a multi-start thread, such a thread converts rotation into linear movement of the insert body 109 from the male part 111a (for example, into the tool cavity of the holder). As can be understood, the linear movement of the body 109 is faster due to the multi-start thread compared to a standard pitch thread. However, in other embodiments, a single thread design can be used.

[0035] There are several reasons for using an electric start system (whether system 110 having a single body output shaft 110c, or system 110' having a multi-element output shaft 110c') with a tool holder assembly 100. Electric systems 110, 110' are particularly efficient and effective at generating the required clamping force compared to other actuation systems. Both systems 110, 110' have a limited number of components, which can lead to a simplified structure. However, despite their simplicity, a DC motor 110a used with systems 110, 110' can achieve greater torque, especially when using a high gear ratio in the motor, as the higher gear ratio corresponds to a higher clamping force, as will be further explained below.

[0036] When gearboxes 110b, 110b' (with worm gear drive) are used in combination with such motor 110a, systems 110, 110' exhibit mechanical self-locking of output shafts 110c, 110c' via the gear mechanism when in a first (or "started") position. Thus, insert body 108 or 109 is in either case locked and maintained in a closed (or "clamped") state, for example, together with insert body 108 as shown in Figure 3B. Such a first position represents the locked position of shafts 110c, 110c'. In other words, once activated via the electrical system 110 or 110', and as a result the fixture is fixed / seated, the threading and gearing of the motor / gearbox are locked in place, making it virtually impossible to move the fixture. Naturally, insert body 108 (or insert body 109) can be reversed from its locked position via system 110 (or system 110') when desired. Mechanical locking allows the clamping force of the electrical system 110 (50-100 pounds) to be lower and more effective than the clamping force required by other actuation systems. This locking characteristic of the electrical systems 110, 110' (from the motor / gear unit) is maintained even when power is lost, whereas this is not the case with other actuation systems. Using the electric start system 110 or 110' as an actuation source allows for reliable clamping for many applications with less clamping force (than other actuation systems) due to the nature of the mechanical locking characteristics of the start system 110. However, in certain applications, more clamping force may be required (for larger size fixtures), and the electric start systems 110, 110' of the present invention advantageously allow their design elements and parameters to be adaptable to those applications.

[0037] Continuing the above description of the electric start systems 110 and 110', it should be understood that the greater the clamping force, the slower the clamping speed (determined by the speed of the output shafts 110c, 110c'). However, as described above, this is not a significant drawback, as the electric start system 110 can function as needed with smaller clamping forces (50 lbs to 100 lbs). Preferably, other variables are considered when providing a preferred 50 lbs to 100 lbs clamping force. Such variables include the distance the insert body 108 needs to travel to engage / clamp the tool tang 102a, and how many rotations the output shaft 110c needs to make for such a movement. For example, to achieve a clamping force of 70 lbs to 100 lbs, the time required to rotate the shaft 110c sufficiently is in the range of 5.4 seconds to 7.1 seconds. In a particular embodiment, using an output shaft 110c with an M8 × 1.25 pitch, when proceeding with a system for a 70 lb clamping force, the system requires approximately 5.4 seconds. Increasing the pitch of shaft 110c and / or reducing the force to nearly 50 pounds, but not less than 50 pounds, allows the insert body 108 to move further with fewer rotations and / or in less time.

[0038] Alternatively, in certain embodiments as described above, a multi-start threaded insert can be used as the female part 111b, as depicted in the output shaft 110c' of Figures 2D and 2E, to allow slower rotational speeds of the motor 110a to achieve faster clamping times. As stated above, by using such a multi-start insert (or helix) as the female part 111b, the linear motion corresponding to the rotational motion of the shaft 111a extending from the gearbox 110b' is effectively accelerated. One example, as stated above, may include a gear ratio of 600:1 for the motor 110a, which produces about 10 rpm. Such a 10 rpm motor, when used with a 10 mm pitch five-start drive screw for the threaded insert acting as the female part 111b, allows for significant clamping force (100 lbs to 150 lbs) at an acceptable clamping speed in the range of 2 to 2.5 seconds. In comparison, conventional hydraulic systems tended to loosen unless a high clamping force (about 250 lbs) was maintained.

[0039] As described above, the electric start systems 110, 110' have a limited number of components, making them relatively easy to configure and operate. To that end, referring to Figures 1 to 4, the corresponding components are small enough that the electric systems 110, 110' can be provided on one side of the holder assembly 100. Furthermore, referring to Figures 5A and 5B, the components of the electric system 110 are quite compact and are comparable in width to the insert body 108 below. Thus, in certain embodiments as shown in Figures 5A and 5B, a series of integral units, each including a single electric system 110 (or a single system 110' connected to a single body 108, as exemplified in the tool holder assembly 300 illustrated in Figures 8A and 8B) connected to a single insert body 109, can be coupled and connected together in a manner that allows them to operate side by side to form a combined tool holder for one or both of the upper and lower press brake beams (or tables).

[0040] In contrast to the aforementioned concept of an integrated unit, the insert bodies 108 can be grouped together modularly to accommodate any beam length, enabling wide variability for new and modification applications. The tool holder assemblies 100 can be sized to accommodate any number of insert bodies 108 by their integrated start / clamping. For example, different tool holder assembly configurations are depicted in Figures 5A-5D and 6A-6D, as will be further described below. For this purpose, the configurations share common modules but have different lengths / numbers of modules, which can result in considerable savings for shipment. Upon reaching their destination, the tool holder assemblies 100' (see Figure 6A) can be joined together (to form the desired length / arrangement) and operably coupled to press the brake beam or to form the beam. When collectively grouped on a press brake beam (or table), any individual or combination of insert bodies 108 and 109 (and their fingers 108a, 108b and 109a, 109b) can be used for machining applications along the length of the beam. Again, this flexibility with respect to the length of the tool holder assembly 100 allows product packages to be shipped in much smaller units, and packaging to be palletized in smaller units rather than crated. For comparison, the hydraulic beams used in many clamping systems sold today must be fully assembled at the factory against the length of the press brake table and then shipped in standard 8-foot, 10-foot, 12-foot, or even longer lengths.

[0041] Referring to Figures 5A to 5D, in certain embodiments as shown, the tool holder assembly 100 includes a series of lighting devices. In certain embodiments, the lights are LED lights. In certain embodiments referring to Figure 5D, one lighting device may include, for example, an ambient downward-facing light 120 for illuminating the workspace. These lights 120 may be hidden from the overall view (e.g., positioned behind the shield 118) in certain embodiments as shown, but can be seen from the bottom view of the holder assembly 100 as shown in Figure 5D. Alternatively or in addition, in certain embodiments as shown in Figures 5B and 5C, the lighting configuration may include a forward / sideways-facing light 122, for example, a signaling function for the tool holder. In certain embodiments as shown, the light 122 extends over the holder assembly 100 and can be used exemplary to indicate the status of each holder section. For example, light 122 can illuminate red above the unclamped / open section of the holder and green above the clamped / closed section of the holder. In certain embodiments, either light 120 or 122 can be used in combination or alternately to signal any of the various characteristics of the tool holder, depending on their design / orientation. For example, either light 120 or 122 can be used for diagnostic purposes, as illustrated below, although the downward light 120 may work best when signaling a bend line, while signaling the next bend in a stepwise bend, via flashing a light of a specific color such as green, may work best when using the forward / sideways light 122. Furthermore, the forward / sideways light 122 can be used to signal where / when to remove the tool, for example, by flashing a light of a different color such as red. While the forward / side-facing light 122 is described with reference to holder assembly 100, please refer to Figures 11A and 11B to understand that certain holder assembly designs, such as assembly 300, may involve the use of adapter 310.In such cases, it should be understood that such forward / sideways lights 122 can be mounted in one or more forward / sideways ranges of the holder assembly 300 and its adapter 310.

[0042] Further attention will be paid to the lighting embodiments relating to the tool holder assembly, and Figures 5D(i) and 5D(ii) will be described in detail, continuing from the embodiments already described. In particular, the holder assembly 100 illustrates one embodiment of downward lighting relating to the assembly 100. Figure 5D(i) shows the non-limiting location and orientation of individual light sources (e.g., LEDs) 120 over the assembly range, while Figure 5D(ii) represents the direct path 120' of light emitted from the light sources 120. As can be understood, the path 120' can be influenced by any outer shield 118' of the assembly 100 to help direct the light downward onto the work surface.

[0043] Referring to Figures 5E(i) and 5E(ii), another downward lighting configuration for the tool holder assembly 100' is depicted. Similar to the downward lighting configurations in Figures 5D(i) and 5D(ii), the light source (e.g., LED) 124 is positioned behind an optional shield 118', however, the light source 124 shown here is located on the opposite side of the holder assembly 100' (compared to its position in Figures 5D(i) and 5D(ii)). In a particular embodiment, the light path 124 is primarily downward toward the work surface. Thus, when used in combination with the configuration of the light source 120 of assembly 100, the additional downward light can be provided for similar or different purposes, for example, relating to the work sequence or external variables / states related thereto. For example, in a particular embodiment, a desired bend line relating to the job can be projected, or a message and / or icon relating to the job instructions / specifications can be projected.

[0044] Figures 5F(i) and 5F(ii) show a tool holder assembly 100'' having a further downward illumination configuration, thereby positioning the light source (e.g., LED) 126 more centrally relative to the assembly 100'' (i.e., closer to the tool channel of the assembly 100''). In certain embodiments, the light path 126' is primarily directed downward toward the work surface. Thus, if the tool holder assembly 100'' is also configured to provide one or more of the light sources 120 and 124, further downward light from the light source 126 can be provided and used on the work surface as desired. Note that each of the light sources 120, 124, and 126 is shown as being formed from multiple light sources. In certain embodiments, these light sources 120, 124, and 126 can be used in coordination for a single purpose or controlled independently for separate tasks (for example, as illustrated later herein, one or more of the light sources 120, 124, and 126 may be used to project job details, and one or more of the other light sources may be used to provide diagnostic information regarding the function of the tool holder). Similarly, multiple lights from each of these light sources 120, 124, and 126 may be used in coordination for a single purpose or controlled independently for separate tasks. In certain embodiments, for safety concerns, the intensity of the light from each of the light sources 120, 124, and 126 may be varied, for example, by flashing or by changing color.

[0045] It should be understood that a given holder assembly may optionally include one or more of (i) light sources 120, (iii) light sources 124, and (iii) light sources 126 (or two or more, or all three, etc.). Therefore, a given tool holder assembly may optionally include configurations / locations / arrangements of one, two, or all three of such light sources.

[0046] Moving on to Figures 5G(i) and 5G(ii), a press brake machine 250 is shown, illustrating an exemplary electrical system relating to lighting devices for tool holder assemblies 100, 240 on the machine's table 400, 400'. In a particular embodiment, a control unit for machine 250 transmits to a control box 260 to activate one or more downward lighting configurations (e.g., one or more of the light sources 120, 124, and 126) and forward / side lighting 122, as well as to activate clamping and clamping / unclamping of assemblies 100, 240. Accordingly, electrical circuit diagram 5H outlines an exemplary wiring of one such system. However, it should be understood that these details are never necessary.

[0047] For example, upon receiving a signal via the control box 260, the electronic control unit (ECU) 270 is configured to operate the motors for the starting systems of the clamp assemblies 100, 240, and to control the downward lighting on the machine (one or more of the lighting configurations 120, 124, and 126, as well as the forward / side lighting 122 (e.g., an LED strip)). In certain embodiments, the ECU 270 has current sensing capability to monitor the pull-in and, if stall torque is reached, to stop the motor accordingly. In certain embodiments, the ECU 270 can further control the forward / side lighting 122, for example, by making it flash during transitions and / or by setting it to a certain color (e.g., red) for the clamp release state and another color (e.g., green) for the clamp state. In certain embodiments, one or more of the downward lights 120, 124, and 126 can be similarly controlled to perform similar signal notification / functions.

[0048] In certain embodiments, if the ECU 270 detects a current problem, the forward / sideways illumination 122 may be made to provide a problem signal (e.g., by flashing or displaying a different color). In certain embodiments, the ECU 270 may also be configured to provide different code signals, e.g., fast flashes and / or slow flashes, to indicate different problems. For example, if the ECU 270 detects a no-current condition from the clamp assembly, the corresponding code signal may be five fast pulses flashed with a 5-second delay, and then repeated. This signals that the motor is not functioning / responding in a no-current condition. As another example, if a high current pull is detected early in the clamp cycle, two fast pulses may be flashed, followed by two slow pulses flashed with a 5-second delay, and then repeated. This signals that such a high current pull is likely to cause the clamp fingers to stick by reaching stall torque earlier than expected in the clamp cycle. It should be understood that other scenarios may exist that require further monitoring using the current sensing features of the ECU270, in which case a signal diagnostic warning can be displayed via the forward / side lighting 122 accordingly. In certain embodiments, one or more downward lighting configurations 120, 124, and / or 126 can be controlled similarly to provide similar signal notifications / functions. In certain embodiments, each clamp assembly device 100, 240 can be monitored independently and therefore triggered to display its own diagnostic warning, thereby enabling the user to quickly identify which unit has a problem and what the specific problem is.

[0049] As described above, the tool holder assembly 100 may include pairs, each comprising a single electrical system 110 having a single insert body 108, and the assembly 100 can be formed with any desired number of such pairs. For this purpose, Figures 5A–5D show an exemplary tool holder assembly 100 having 24 such pairs, while Figures 6A–6D show a further exemplary tool holder assembly 100' having only 4 such pairs. In certain embodiments, such assemblies 100' may range in length from 6 to 8 inches, thereby the cost of transporting a desired number of such lengths will be lighter compared to transporting lengths ranging from 8 to 12 feet. In effect, the transport cost is significantly lower due to the small module size of the assemblies 100' that can be transported. Upon arrival at the shipping destination, the tool holder assemblies 100' can be joined together (for example, to form longer assemblies as shown in Figures 5A–5D) and operably coupled to a press brake beam or to form a beam. When grouped together on a press brake beam (or table), any individual or combination of insert bodies 108 (and their fingers 108a, 108b) can be used along the beam range for machining applications.

[0050] In certain embodiments, the electric start system 110 may be single and may be configured to pair with (e.g., operably coupled to) multiple insert bodies 108. Such embodiments are illustrated with respect to Figures 7A–7D, which illustrate a further tool holder assembly 200 according to a particular embodiment of the present invention. Similar to the tool holder assembly 100' shown in Figures 6A–6D, the assembly 200 in Figures 7A–7D is shortened in length. As described above, the assembly 200 comprises a single electric start system 210 including a DC motor 210a and a gearbox 210b, the output shaft 210c being configured to couple with a cam 205. In certain embodiments, as shown, the cam 205 is operably coupled to a pivot arm 207 configured to actuate the insert body 208. In certain embodiments, the insert body 208 has multiple fingers similar to those already described with respect to the insert body 108. However, the insert body may alternatively have a single finger.

[0051] When the electrical system 210 is activated during use, the output shaft 210c rotates. The distal end of the shaft 210c is defined by an inclined channel into which a cam 205 engages. As the shaft 210c rotates during activation, the channel becomes shallower for the cam 205 (thus causing a camming action), and the cam 205 is extended to exert an outward force on one end (e.g., the upper end) of the pivot arm 207. Such an outward force deflects the other end (e.g., the bottom end) of the pivot arm 207 inward, and accordingly provides an inward force to the insert body 208, causing one or more of its fingers 208a, 208b to move into the tool channel 200a and engage with a jig (not shown) therein. In certain embodiments, as already described with respect to the insert body 108 in Figures 1 and 2, the distal ends 208a', 208b' have inclined upper surfaces (e.g., angled from the horizontal), and thus they advantageously engage with the inclined upper surfaces that boundary the groove on the tang of the loaded fixture and apply force thereto. Thus, the initiation (and corresponding drive) of the insert body 208 into such a tang groove causes the fixture to first be fixed against the side wall 206b of the stationary portion 206, and then, depending on the fixture type, further seated against the lower wall 206a and / or upper wall 206c.

[0052] By configuring the electric start system 210 to function with the cam 205 as illustrated, the insert body 208 can be moved at a higher speed along with the gearbox 210b, which moves at a lower speed. To this end, the cam 205 is designed to move the insert body 208 only the distance required to fix / seat the jig (loaded in the tool channel 200a), rather than requiring the motor 210a to rotate an additional number of times based on the thread pitch, as in the case of system 110 in Figures 5A-5D. As described above, the distance the cam 205 moves (via the rotation of the output shaft 210c) corresponds to the distance the insert body 208 moves (via the pivot arm 207). In certain embodiments, the distances moved by the cam 205 and the insert body 208 can be related in a 1:1 ratio. However, the present invention is not limited in this way. In particular, this ratio can be varied as desired (for example, through a variation made to the pivot arm 207) to generate a lever effect that correspondingly increases or decreases the clamping force output by the motor gearbox.

[0053] Based on the concepts detailed with reference to Figures 6A to 6D, Figures 8A to 8B illustrate a tool holder assembly 300 in a specific range according to a particular embodiment of the present invention. In particular, as shown, the assembly 300 consists of four pairs (or four “modules”), each containing a single electrical system 110’ having a single insert body 109. As recognized, the holder assembly 300 shares similarities with the assembly 100’ in Figures 6A to 6D in that there are four pairs. However, the assembly 300 differs in that it is formed to be wrapped or enclosed. For this purpose, the overall length of the assembly 300 and / or the spacing between the fingers 109a, 109b of the insert body 109 can be established / standard parameters. For example, in a particular embodiment, the length of the assembly 300 can be in the range of 100 mm to 200 mm. In a more preferred embodiment, the assembly 300 can be in the range of 150 mm to 170 mm in length. Regarding the spacing between the fingers 109a and 109b of the insert body 109, this depends somewhat on the length of the assembly 300. In certain embodiments, the spacing can be in the range of 0 mm to 50 mm. In more preferred embodiments, the spacing can be in the range of 10 mm to 40 mm, in even more preferred embodiments, the spacing can be in the range of 20 mm to 30 mm, and in preferred embodiments, the spacing can be in the range of 20 mm to 25 mm.

[0054] In contrast to the advantageous concept of modular units, the assemblies 300 can be grouped together to accommodate any beam length, enabling a wide range of variability for new and refit applications. As a result, transportation savings can be achieved. For example, upon reaching their destination, the tool holder assemblies 300 can be joined together (to form a desired length / arrangement) and operably coupled to press the brake beam. When collectively grouped on a press brake beam (or table), any individual or combination of the insert bodies 109 (and their fingers 109a, 109b) can be used for machining applications along the beam length. This flexibility of the tool holder assemblies to length allows product packages to be shipped in much smaller units, and packaging can be palletized in smaller units rather than cratered. These assemblies can be significantly smaller in size compared to hydraulic beams that must be fully assembled and then shipped in standard 8-foot, 10-foot, 12-foot, or even longer lengths.

[0055] Moving to Figure 9, a beam adapter 310 is illustrated, which in a particular embodiment is configured to work with the modular tool holder assembly 300 of Figure 8A. For this purpose, the adapter 310 is used to mount to a specific OEM mounting option (Euro Style Z1 or Z2, UBP, etc.) and can be formed to have any applicable length. When in use, the top surface 312 of the adapter 310 is attached to the upper (or lower) beam of the press brake, and one or more assemblies 300 can be mounted to the adapter 310 via a mounting bar 314. As shown, the bar 314 is defined with a series of mounting holes 316 located spaced apart along its length. Returning to Figure 8A, each assembly 300 consists of one or more (e.g., a pair) mounting fasteners (e.g., threaded fasteners such as bolts or screws) 302 that are positioned / spaced to align with the hole spacing of the mounting bar 314. Thus, the tool holder assemblies 300 can be mounted to the adapter 310 as needed. To that end, Figures 10A and 10B illustrate close and spaced arrangements of such assemblies 300, respectively. It should be understood that the spacing 318 between the assemblies 300 in Figure 10B can be varied as needed to provide a guaranteed tool holder configuration.

[0056] Several advantages should be realized from the mounting configuration illustrated through Figures 10A and 10B. For example, if a section is damaged, only that section can be easily replaced by unplugging the supply cable, removing its fastener 302, and pulling the damaged section away from the beam adapter 310. The steps to do this may take about 5 to 10 minutes compared to days or weeks for a service call for a broken solid beam. Also, in the case of a damaged section, the rest of the holder assembly 300 continues to function, compared to the entire beam which is potentially unusable until a repair is made to one non-functional area along the beam.

[0057] Referring to Figures 11A and 11B, the adapter 310 is shown mounted (e.g., via fasteners) to the corresponding beam 400 of the press brake (e.g., the upper beam). Given this rigid platform / support, it should be understood that any desired number of tool holder assemblies 300 can be mounted via the adapter 310 (and its mounting bar 314) to function with the beam 400. However, as already stated herein, various other adapters and / or configurations can be used alternatively to secure the tool holder assemblies 300 to the press brake beam. In certain embodiments, the assembly 300 can be configured to have an integral coupling for joining with the press brake beam. Thus, a separate adapter used between the tool holder assembly 310 and the beam is not required. For example, referring to Figure 12, the leading surface 412 of the press brake beam 400' can be formed, i.e., molded or shaped, to directly interface and mate with the tool holder assembly 300. As described above, tool holder assemblies 300 of varying numbers and / or lengths can be configured in this manner depending on the work job and the range of beams used for it.

[0058] In certain embodiments, a beam can be formed to have one or more interface / mounting configurations. For example, beam 410 shown in Figure 13A is configured with mounting bars 414 (which may be integral projections of a single metal body defining beam 410), while beam 410'' shown in Figure 13C is configured to be directly mounted via a mounting bolt pattern 416', such as a universal bolt pattern. In certain embodiments, as illustrated in Figure 13B, beam 410' can be configured with multiple mounting interfaces along its range. For example, as shown, the beam range can be divided into two parts (e.g., a first length section and a second length section), each of which is configured with different mounting interfaces, such as by direct mounting via mounting bars 414' and a universal bolt pattern 416. It should be understood that other configurations may be used for the beam interface depending on the intended application of the beam. For example, the Z1 or Z2 configuration is often a preferred choice for Euro-style beams. For this reason, the present invention should not be limited.

[0059] Referring to Figures 14 and 15A-15C, the embodiments described above are also applicable to the lower beam 510 of the press brake. For this purpose, the beam 510 can be configured to accommodate a holder assembly 350 having various mounting interfaces. In certain embodiments, the lower beam 510 can be formed to have one or more interface / mounting configurations. For example, the beam 510 shown in Figure 15A is configured with a mounting bar 514 (which may be an integral projection of a single metal body defining the beam 510), while the beam 510'' shown in Figure 15C is configured to be mounted directly via a setting bolt pattern 516', such as a universal bolt pattern. Referring to Figure 15B, in certain embodiments, the beam 510' can be configured with multiple mounting interfaces along its range. For example, as shown, the beam range can be divided into two parts (e.g., a first length portion and a second length portion), each of which is configured with a different mounting interface, such as by direct mounting via mounting bars 514' and universal bolt pattern 516. Similar to those described with respect to the upper beam embodiment, other configurations may be used for the lower beam interface depending on the intended application of the beam. For this reason, the present invention should not be limited.

[0060] In certain embodiments where the upper or lower beam has a mounting bar (e.g., 414), preferably the mounting bar has a series of openings, each of which extends laterally (e.g., horizontally) through the thickness of the mounting bar, and the series of openings are spaced apart from each other along the length of the mounting bar. In embodiments including at least one UBP region, there are a number of vertical bolt holes extending into the beam.

[0061] It should be understood that ease of use, adaptability, and repairability are the objectives of the embodied system. For example, in the case of repair, and in relation to Figures 2C and 2D, by using the male part 111a and female part 111b on the output shaft 110c' of the electrical starting system 110', these parts can be easily separated as needed for maintenance or repair of the electrical system 110'. Furthermore, in some embodiments, the motor 110a can be replaced simply by removing the screws on the back of the assembly 300, removing the back cover 304, unplugging the motor 310a, sliding the male part 111a from its coupling to the female part 111b, thereby freeing the electrical system 110' for removal. In some preferred embodiments, these steps take only about 5-10 minutes compared to days or weeks for a service call for a broken solid beam. Also, in the case of motor failure, the rest of the holder assembly 300 continues to function, compared to a solid beam bladder failure where the entire beam cannot be used until it is repaired.

[0062] Thus, embodiments of a tool holder assembly, as well as seating / fixing components and a starting system therefor, are disclosed. Those skilled in the art will recognize that the present invention can be implemented in embodiments other than those disclosed. The disclosed embodiments are presented for illustrative purposes only and not limiting purposes, and the present invention is limited only by the following claims.

Claims

1. A tool holder assembly, A stationary portion having vertical side walls that partially define the tool channel, One or more movable parts located opposite the vertical side wall of the stationary part, A tool holder assembly comprising an electric start system in which one or more movable parts are operably connected, wherein the electric start system comprises one or more modules, at least one of which is connected to one of the movable parts via an output shaft, so that in the event of failure, at least one module can be removed from the tool holder assembly by removing the output shaft from one of the movable parts.

2. The tool assembly according to claim 1, wherein each of the one or more modules comprises a motor and a gearbox, and the output shaft of at least one module extends from the gearbox.

3. The tool assembly according to claim 1, wherein the one or more movable parts comprise a plurality of the movable parts, the one or more modules comprise a plurality of the modules, the plurality of modules are aligned side by side on one side of the assembly, and each of the plurality of modules is connected to a separate movable part of the plurality of movable parts.

4. The tool assembly according to claim 1, wherein the output shaft is movable when the at least one module is started, and when moved, it results in a corresponding movement of the one movable part.

5. The tool holder assembly according to claim 1, wherein the one movable portion is screwably connected to the output shaft, and the output shaft is movable by the rotation of the at least one module upon startup, such rotation resulting in rotation of the one movable portion relative to the output shaft.

6. The tool holder assembly according to claim 1, wherein the output shaft has a multi-pointed star shape.

7. The tool holder assembly according to claim 6, wherein the output shaft has an external thread including a multi-start thread, and the multi-start thread converts rotation into linear movement of the one movable portion.

8. The tool holder assembly according to claim 7, wherein the one movable portion has a plurality of fingers, the fingers protruding from the one movable portion, so that the fingers engage with a tool when loaded into the channel while the one movable portion is moving.

9. The tool holder assembly according to claim 8, wherein the plurality of fingers are two fingers, and the two fingers are offset so that the fingers contact and engage at one or more different points on the jig and along different axes when loaded into the tool channel.

10. A tool holder assembly, A stationary portion having vertical side walls that partially define the tool channel, A movable portion located opposite the vertical side wall of the stationary portion, A starting system, wherein the movable part is operably connected, and is configured to move relative to a tool channel in response to the starting of the system, such that the movable part provides a locked engagement with the tool when loaded into the channel; A tool holder assembly comprising a series of lighting devices for one or more of the following: illuminating a machining area adjacent to the tool channel; and signaling the status of one or more of the current use of the movable part and one or more machining operations scheduled for the movable part.

11. The tool holder assembly according to claim 10, wherein the series of lighting devices includes one or both of a first lighting device and a second lighting device coupled to or operably coupled to the assembly, the first lighting device of the lighting devices being positioned close to the tool channel to illuminate a machining area adjacent to the tool channel, and the second lighting device of the lighting devices being extended along the longitudinal range of the stationary portion to signal the state of the current use of the movable portion and one or more of the machining operations scheduled for the movable portion.

12. The tool holder assembly according to claim 11, wherein the series of lighting devices includes only the first lighting device, and the first lighting device is at least partially shielded so as to direct light from the first lighting device toward the work surface.

13. The tool holder assembly according to claim 12, wherein the light from the first lighting device projects a desired bending line onto the work surface.

14. The tool holder assembly according to claim 12, wherein the light from the first lighting device projects information corresponding to the machining job sequence onto the work surface.

15. The tool holder assembly according to claim 12, wherein the first lighting device comprises a plurality of lighting configurations, each positioned at different locations on the tool holder assembly.

16. The tool holder assembly according to claim 11, wherein the series of lighting devices includes only the second lighting device, and the starting system is an electric starting system.

17. The tool holder assembly according to claim 16, further comprising a module for monitoring the electrical parameters of the startup system, wherein the module is electrically connected to the second lighting device to change the parameters of the light projected from the second lighting device based on the electrical parameters.

18. The tool holder assembly according to claim 17, wherein the parameters of the projected light are one or more of color, intensity, and duration.

19. The tool holder assembly according to claim 11, wherein the series of lighting devices includes both the first lighting device and the second lighting device.

20. The tool holder assembly according to claim 19, wherein the first lighting device and the second lighting device each comprise a lighting configuration with a plurality of light sources, and the plurality of light sources for each lighting device are configured to be used in coordination.

21. It is a press brake machine, The upper beam and the lower beam, A holder assembly is attached to one end of the upper beam or the lower beam, A press brake machine in which the end of one upper or lower beam is formed to interface with and engage with the mounting surface of the holder assembly.

22. The press brake machine according to claim 21, wherein the end of one of the upper or lower beams is formed to have a mounting bar sized to align with a mounting channel defined in the holder assembly.

23. The holder assembly, A stationary portion having vertical side walls that partially define the tool channel, A movable portion located opposite the vertical side wall of the stationary portion, A press brake machine according to claim 21, comprising: a starting system, wherein the movable part is operably connected, and when the system is started, the movable part is moved relative to the tool channel, resulting in a locked engagement with the tool when loaded into the channel.

24. The press brake machine according to claim 23, wherein the holder assembly further comprises at least two illumination devices, the first of which is positioned to illuminate a machining area adjacent to the tool channel, and the second of which extends along the longitudinal range of the stationary portion to signal the status of the current use of the movable portion and one or more machining operations scheduled for the movable portion.

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