Adjustable coupling for a stamping and forming tool and stamping and / or forming machine having an adjustable coupling

Abstract

The invention relates to an adjustable coupling for a punching and forming tool for connecting a punch to a drive tappet in such a way that a force can be transmitted from the drive tappet to the punch in such a way that the punch carries out a punching and / or forming process on a workpiece, the adjustable coupling having a tappet element and a punch element, the tappet element and the punch element are connected to each other in such a way that they can be moved relative to each other in the longitudinal direction between the punch and the drive tappet, an adjustment screw being arranged between the tappet element and the punch element, the adjustment screw interacting with an adjustment wedge, wherein the adjusting wedge, on opposite sides in the longitudinal direction, bears with a first setting surface against a first stop surface of the tappet element and with a second setting surface against a second stop surface of the punch element. The invention further relates to a punching and / or forming machine having an adjustable coupling according to the invention between at least one punch and at least one drive plunger.

Description

Technical Field

[0001] The present invention relates to an adjustable coupling for a stamping and forming tool, the adjustable coupling being used to connect a punch to a drive push rod such that force can be transmitted from the drive push rod to the punch, enabling the punch to perform a stamping and / or forming process at a workpiece, and the present invention relates to a stamping and / or forming machine having an adjustable coupling between at least one punch and at least one drive push rod. Background Technology

[0002] In stamping and / or forming processes, the punch must act on the workpiece along a precisely set path length (also known as the penetration depth), or at a dead point—the point where the punch ceases further movement—to achieve the desired shape. For this purpose, a shim (also known as an adjustment plate) is typically placed between the push rod and the coupling to allow for precise setting of the penetration depth. However, this is labor-intensive and difficult because many components must move, be manipulated, or be affected, and these areas are often inaccessible.

[0003] Therefore, as known from DE 10 2019 215 750 A1, a multi-piece coupling with a coupled push rod element and a coupled punch element is used, wherein these two parts can be detachably connected to each other and remain connected in a partially detached state but can move relative to each other. For this purpose, for each individual desired depth of penetration, an individualized stop element is inserted into an opening in the coupled push rod element, the individualized stop element being different in its length extension along the longitudinal axis of the coupling. The stop element (relative to the longitudinal axis of the coupling) stops the coupled push rod element above and the coupled punch element below, and is fixedly mounted at the coupled push rod element by means of a clamping screw. At each desired change in penetration depth, the clamping screw must be loosened, and a stop element with a height precisely corresponding to the desired penetration depth must be removed from a set of existing stop elements, and then the original stop element must be replaced with the new stop element. The clamping screw must then be tightened again. Maintaining a set of stop elements at different heights is costly and error-prone, as one or more stop elements may be lost during replacement. Furthermore, it may be desirable to have a sinking depth such that a stop element with the exact required height does not exist relative to that sinking depth. Summary of the Invention

[0004] Therefore, the object of the present invention is to provide an adjustable coupling element that overcomes the aforementioned disadvantages.

[0005] According to the invention, the objective is achieved by an adjustable coupling for stamping and forming tools according to the invention. Advantageous designs are described below.

[0006] An adjustable coupling for a stamping and forming tool according to the invention comprises a push rod element and a punch element connected to each other such that the push rod element and the punch element can move relative to each other in the longitudinal direction between the punch and the drive push rod. This allows the penetration depth to be set without replacing the entire coupling. An adjusting screw is provided between the push rod element and the punch element, the adjusting screw interacting with an adjusting wedge whose extension in the longitudinal direction depends on the angular position of the adjusting screw. This allows for continuous adjustment of the penetration depth of the coupling. A particularly simple implementation is feasible because the adjusting wedge contacts the first stop surface of the push rod element and the second stop surface of the punch element at opposite setting surfaces in the longitudinal direction, and at least one of the two setting surfaces is inclined relative to the direction of the adjusting screw rod. The adjusting wedge is self-locking, and / or the adjusting screw is connected to a clamping device that fixes the angular position of the adjusting screw. If the adjusting wedge is self-locking, there is no need for additional equipment to prevent undesirable changes in the sinking depth. If a clamping device is present, undesirable changes in the sinking depth are prevented by a simple yet reliable method.

[0007] An advantageous improvement of the invention proposes that the first stop surface has the same slope relative to the longitudinal axis as the first setting surface of the adjusting wedge, and / or the second stop surface has the same slope relative to the longitudinal axis as the second setting surface of the adjusting wedge. Thus, the adjusting wedge can slide continuously along the associated stop surface with at least one of its (inclined) setting surfaces, thereby allowing stepless setting of the desired submersion depth of the coupling.

[0008] Another advantageous improvement of the invention proposes a clamping device for fixing the adjusting screw, comprising a stop screw and a clamping body that work in conjunction with a push rod element, the clamping body working together with the stop screw, the adjusting screw, and the push rod element. Thus, the fixing of the adjusting screw is reliably ensured simultaneously by means of a device that is simple to manufacture.

[0009] Another advantageous improvement of the invention proposes that the clamping body is U-shaped, with the free ends of the U-shaped legs located in the area of ​​the stop screw, and the adjusting screw located between the stop screw and the transition area between the two legs of the U-shape. Thus, the clamping body can be constructed in one piece, resulting in simpler operation during adjustment.

[0010] Another advantageous improvement of the invention proposes that a rib be formed at one of the legs of the clamping body, and a groove be formed at the push rod element that is inversely oriented to the rib. This achieves a simple and reliable feasibility in how the clamping body can be positioned and held in its designated location.

[0011] Another advantageous improvement of the invention proposes that one of the two legs has a setting hole, which is aligned with the screw head of the adjusting screw in the single-piece installation state of the coupler. Thus, the clamping body does not need to be removed from the push rod element during adjustment of the insertion depth of the coupler by rotating the adjusting screw.

[0012] Another advantageous improvement of the invention proposes that one of the legs of the clamping body has a push-in opening for receiving the screw head of an adjusting screw. Thus, the clamping body can be pushed via the screw head of a pre-installed adjusting screw, which is positioned and secured at the push rod element.

[0013] Another advantageous improvement of the invention proposes that a first guide rail is formed at the first setting surface of the adjusting wedge and a first guide tab with an opposite configuration to the first guide rail is formed at the push rod element, and / or a second guide rail is formed at the second setting surface of the adjusting wedge and a second guide tab with an opposite configuration to the second guide rail is formed at the punch element. Thus, the push rod element and / or the punch element maintain engagement with the adjusting wedge in a simple manner and method during and after rotating the adjusting screw to change the insertion depth of the coupling.

[0014] The objective is also achieved by a stamping and / or forming machine according to the invention, the stamping and / or forming machine having an adjustable coupling between at least one punch and at least one drive push rod. This achieves the advantages described above regarding the coupling according to the invention. Attached Figure Description

[0015] Further details and advantages of the invention will now be explained in detail with reference to embodiments shown in the accompanying drawings. The drawings show:

[0016] Figure 1 The coupling element according to the invention is shown in a perspective view.

[0017] Figure 2 In relation to Figure 1 The scale reduction is shown in the decomposition state. Figure 1 The coupling element according to the present invention,

[0018] Figures 3a to 3b In relation to Figure 1 The magnified view shows the adjusting wedge according to the invention in two views.

[0019] Figures 4a to 4b In relation to Figure 1 The clamping body according to the invention is shown in two views at a slightly enlarged scale.

[0020] Figure 5 In relation to Figure 1 The slightly scaled-down proportions are shown in the side view. Figure 1 The coupling element according to the invention, and

[0021] Figure 6 According to Figure 5 The cross-sectional view of line AA in the middle shows Figure 1 The coupling element according to the present invention. Detailed Implementation

[0022] Figure 1 The coupling element according to the invention is shown, the coupling element having a push rod element 1, a punch element 2, an adjusting device 3, and a clamping device 4. Figure 2 China and Israel relative Figure 1 The diagram in the image is rotated 45° to show the state in which the parts are decomposed. Figure 1 The coupling components in the figure. The reference numerals listed there are mainly explained in conjunction with other figures (refer to them where necessary). Figure 2 ( ), a single piece is shown in the accompanying drawings.

[0023] The push rod element 1 and the punch element 2 can move relative to each other. To guide the relative movement, a double-guide protrusion 21 is formed at the punch element 2 and a double-guide groove 11 is formed at the push rod element 1, more precisely, so that the movement can only be carried out in the following direction: the direction—vertically in the diagram—extends from the push rod coupling mechanism 10 at the push rod element 2 toward the punch coupling mechanism 20 at the punch element 2. This ensures that the relative movement is precisely used for the purpose of changing the distance between the punch coupled to the coupling member and the drive push rod (neither shown) in order to set the sinking depth.

[0024] To enable precise and stepless setting of the insertion point, an adjustment device 3 is provided between the push rod element 1 and the punch element 2, such as in... Figure 6 As shown in the illustration. In the illustrated embodiment, the adjusting device 3 consists of an adjusting wedge 31 and an adjusting screw 30, the adjusting screw passing through the adjusting wedge (see also...). Figure 3a and Figure 3b ).

[0025] Adjusting wedge 31 in its (about according to Figure 1 The upper end of the mounting direction has a first guide rail 35 with an undercut and is located in relation to the mounting direction. Figure 1The lower end of the first guide rail 35 (in the installation direction) has a second guide rail 38 with an undercut. An adjusting wedge 31 passes through the center of an internal thread 34 in the horizontal direction, and an adjusting screw 30 engages with the internal thread formed at its rod 36. The first guide rail 35 and a first guide tab 15 formed opposite to the first guide rail at the push rod element 1 (see...) Figure 6 The second guide rail 38 works together with the second guide tab 23, which is formed opposite to the second guide rail at the punch element 2 (see...). Figure 2 and Figure 6 The two work together, in such a way that the corresponding guide tabs 15 and 23 slide within the associated guide rails 35 and 38. Due to the chosen angle, in Figure 2 Only the second guide piece 23 at the right end of the punch element 2 is shown. A corresponding guide portion is also formed at the push rod element 1 in the area where the upper end of the adjusting wedge 31 is located at the push rod element 1. Figure 2 , Figure 3a , Figure 3b and Figure 6 The first setting surface 32 is marked in the middle. The contact surface of the push rod element 1 opposite to the first setting surface 32 of the adjusting wedge 31 is in... Figure 6 It has an inclined, extending surface shown as a first stop surface 12, at which a first guide tab 15 is formed in the opposite direction to the first guide rail 35 of the adjusting wedge 31. Conversely, (in Figure 6 The lower end of the wedge 31 and the contact surface between it and the punch element 2 extend horizontally. This contact surface on the side of the punch element 2 is called the second stop surface 22 (see [reference]). Figure 6 And on the side of the adjusting wedge 31, it is called the second setting surface 37 (see Figure 3). Figure 3a , Figure 3b and Figure 6 Therefore, the penetration depth—which is related to the total length of the coupling from the push rod coupling mechanism 10 to the punch coupling mechanism 20—depends on the horizontal position of the adjusting wedge 31. Figure 6 How far does it sink to the left into push rod element 1?

[0026] The insertion depth of the adjusting wedge 31 into the push rod element 1 is set by rotating the adjusting screw 30. For this purpose, the screw head 33 of the adjusting screw 30 is always held in the same position by means of the clamping device 4 (this is explained below according to the...). Figure 4a and Figure 4b(To explain further) – the screw head therefore cannot move, in particular, in the horizontal direction. When the adjusting screw 30 is turned clockwise, the adjusting wedge 31 moves to the left, causing the push rod element 1 and the punch element 2 to press away from each other in the vertical direction, increasing the total length of the coupling and thus increasing the sinking depth when machining the workpiece. When the adjusting screw 30 is turned counterclockwise, the adjusting wedge 31 moves to the right, causing the vertical distance between the push rod element 1 and the punch element 2 to decrease, thereby decreasing the sinking depth of the coupling. The sinking depth is related to the change in the total rotation angle of the adjusting screw 30 and the thread of the adjusting screw 30 (and thus also the internal thread 34 of the adjusting wedge 31) and the slope of the first setting surface 32 of the adjusting wedge 31 relative to the central axis of the internal thread 34 of the adjusting wedge.

[0027] The head of the adjusting screw 30 is secured by the clamping device 4, preventing the adjusting screw 30 from accidentally twisting. The clamping device 30 is implemented in one piece, and in its... Figure 6 The cross-section shown has a U-shape with two vertically extending legs 43 and a transition region 42 connecting the two legs 43 in the lower region. A free space 44 is formed between the two legs 43 above the transition region 42. The size of this free space depends on the degree to which the clamping bodies are pressed together horizontally by means of stop screws 41 in the regions of the two upper free ends of the legs 43. The stop screws 41 pass through the two legs 43 via drilled holes 48 and engage in stop threads 13 in the push rod element 1.

[0028] The clamping body 40 has a lateral push-in opening 46, which allows it to be laterally pushed onto the push rod element 1 via the screw head 33 of the adjusting screw 33, until it reaches the push rod element 1. Figure 1 and Figure 6 The position shown is such that the screw head 33 of the adjusting screw 30 is stopped horizontally at the end of the push-in opening 46. Precise orientation of the clamping body 40 at the push rod element 1 is also achieved by providing horizontally extending ribs 45 at the legs 43 of the clamping body that abut against the push rod element 1, the ribs being positioned within corresponding horizontally extending grooves 14 formed at the push rod element 1. If the clamping body 40 is in its correct position, the clamping bodies are pressed together by means of the stop screw 41 until the screw head 33 of the adjusting screw 30 is firmly clamped and can no longer move. This is achieved by guiding the stop screw 41 through drilled holes 48 formed at the upper ends of the two legs 43 and screwing it into the corresponding stop thread 13 in the push rod element 1. This ensures that the adjusting screw 30 will not undergo undesirable twisting.

[0029] To change the insertion depth of the coupling, slightly loosen the stop screw 41 until the head 33 of the adjusting screw 30 is no longer clamped—but still in a fixed position—and can be rotated in the internal thread 34 of the adjusting wedge 31. This is possible via a setting hole 47 in the leg 43 opposite to the push rod element 1, which is aligned with the head 33 of the adjusting screw 30, and through which an Allen wrench can be engaged with the hexagonal edge at the head 33 and the adjusting screw 30 can be turned. If the desired insertion depth of the coupling is achieved, tighten the stop screw 41 again until the head 33 of the adjusting screw 30 is reliably clamped in the clamping device 4 and can no longer be rotated.

[0030] List of reference numerals

[0031] 1. Push rod element

[0032] 2-punch component

[0033] 3. Adjustment equipment

[0034] 4 Clamping equipment

[0035] 10. Push rod coupling mechanism

[0036] 11 guide slots

[0037] 12 First stop surface

[0038] 13 Stop Thread

[0039] 14 trenches

[0040] 15 First guide splice

[0041] 20-punch coupling mechanism

[0042] 21. Guiding Prominence

[0043] 22 Second stop surface

[0044] 23 Second guide splice

[0045] 30 Adjusting Screw

[0046] 31 Adjusting wedge

[0047] 32 First Setting Surface

[0048] 33 screw head

[0049] 34 internal thread

[0050] 35 First guide rail

[0051] 36 strokes

[0052] 37 Second Setting Surface

[0053] 38 Second Guide Rail

[0054] 40 clamping body

[0055] 41 stop screw

[0056] 42 Transition Zone

[0057] 43 legs

[0058] 44 Free Space

[0059] 45 ribs

[0060] 46 Push into the opening

[0061] 47 Setting Hole

[0062] 48 drilling

Claims

1. An adjustable coupling for a stamping and forming tool, the adjustable coupling connecting a punch to a drive push rod, such that force can be transmitted from the drive push rod to the punch, enabling the punch to perform a stamping and / or forming process at a workpiece. The adjustable coupling has a push rod element (1) and a punch element (2), which are connected to each other such that the push rod element and the punch element can move relative to each other in the longitudinal direction between the punch and the drive push rod. An adjusting screw (30) is provided between the push rod element (1) and the punch element (2). The adjusting screw and the adjusting wedge (31) work together. The position of the adjusting wedge along the longitudinal direction in the direction of the rod (36) of the adjusting screw (30) depends on the angular position of the adjusting screw (30). The adjusting wedge (31) abuts against the first stop surface (12) of the push rod element (1) on opposite sides along the longitudinal direction with a first setting surface (32) and against the second stop surface (22) of the punch element (2) with a second setting surface (37). At least one of the combinations consisting of the first setting surface (32) and the first stop surface (12) or the combination consisting of the second setting surface (37) and the second stop surface (22) is inclined relative to the direction of the rod (36) of the adjusting screw (30). The adjusting wedge (31) is self-locking, and / or the adjusting screw (30) is connected to the clamping device (4), which fixes the angular position of the adjusting screw (30).

2. The adjustable coupling according to claim 1, wherein the first stop surface (12) has the same slope relative to the longitudinal axis as the first setting surface (32) of the adjusting wedge (31), and / or the second stop surface (22) has the same slope relative to the longitudinal axis as the second setting surface (37) of the adjusting wedge (31).

3. An adjustable coupling according to any one of the preceding claims, wherein the clamping device (4) for fixing the adjusting screw (30) has a stop screw (41) and a clamping body (40) that work together with the push rod element (1), the clamping body working together with the stop screw (41), the adjusting screw (30) and the push rod element (1).

4. The adjustable coupling according to claim 3, wherein the clamping body (40) is U-shaped, the free ends of the legs (43) of the U shape are located in the region of the stop screw (41), and the adjusting screw (30) is located between the stop screw (41) and the transition region (42) between the two legs (43) of the U shape.

5. The adjustable coupling according to claim 4, wherein a rib (45) is formed at one of the legs (43) of the clamping body (40), and a groove (14) with the opposite structure to the rib is formed at the push rod element (1).

6. The adjustable coupling according to any one of claims 4 or 5, wherein one of the two legs (43) has a setting hole (47) which is provided aligned with the screw head (33) of the adjusting screw (30) in the single-piece installation state of the coupling.

7. The adjustable coupling according to any one of claims 4 to 6, wherein a push-in opening for receiving the screw head (33) of the adjusting screw (30) is provided at one of the legs (43) of the clamping body (40).

8. An adjustable coupling according to any one of the preceding claims, wherein a first guide rail (35) is formed at the first setting surface (32) of the adjusting wedge (31) and a first guide tab (15) with the opposite configuration to the first guide rail is formed at the push rod element (1), and / or a second guide rail (38) is formed at the second setting surface (37) of the adjusting wedge (31) and a second guide tab (23) with the opposite configuration to the second guide rail is formed at the punch element (2).

9. A stamping and / or forming machine, the stamping and / or forming machine comprising at least one punch and at least one drive push rod, wherein at least one coupling element according to any one of the preceding claims is provided between the at least one punch and the at least one drive push rod.

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