Bending center downward pressing cutter deflection compensation device

Abstract

The utility model discloses a deflection compensation device for a bending center lower pressing cutter. The deflection compensation device comprises a compensation loading mechanism, the lower pressing cutter is mounted at the top of the lower base in the bending center; the bottom of the lower base is supported by a plurality of reinforcing plates; an opening is formed in the front side surface of at least one reinforcing plate; one compensation loading mechanism is arranged in each opening, and the compensation loading mechanism can expand the opening degree of the corresponding opening. According to the device, deformation compensation of the lower pressing cutter can be achieved, the structure is simple, cost is low, safety and reliability are achieved, adjustment is convenient, the effect is obvious, in addition, automatic compensation can be adopted, real-time dynamic adjustment can be achieved, or a lower-cost manual adjustment mode is adopted according to the requirements of actual use scenes.

Description

Technical Field

[0001] The utility model relates to the field of sheet metal bending processing, in particular to a bending center lower pressing knife deflection compensation device. Background Art

[0002] Bending center is a kind of processing equipment with high automation and high processing efficiency developed in the field of sheet metal bending processing in recent years. Its application in the sheet metal processing industry is gradually becoming popular. With the continuous expansion of its application sub-industries, its application in large-format thick plate processing sub-industries such as electrical cabinets and anti-theft doors has also begun. As the processing format becomes larger and the plate thickness becomes thicker, the impact of its deflection deformation on precision has gradually become a pain point in the industry. In addition, after the machine tool has been working for a period of time, the wear of the mold will also affect the processing accuracy, and the accuracy needs to be adjusted through deflection compensation.

[0003] When the plate is bent, the lower pressing knife is subjected to horizontal load, which will cause bending deformation of the lower pressing knife. The deformation cloud diagram of the lower pressing knife under the horizontal bending load is as follows: Figure 2 As shown, from Figure 2 It can be clearly seen that the bending deformation caused by the lower pressing knife will seriously affect the bending accuracy.

[0004] In response to the above technical problems, the following two patent applications emerged:

[0005] (1) Publication number is CN212168753U, and the invention name is “A bending machine blade curvature adjustment mechanism”

[0006] (2) Publication number is CN216226306U, and the invention name is “A multi-faceted linkage disturbance automatic compensation mechanism for a bending machine”

[0007] Although the above two patents can improve the influence of deflection deformation on precision to a certain extent, there are still the following problems in actual use that need to be solved:

[0008] Both patents want to compensate for the deflection deformation of the lower pressing knife by changing the curvature of the lower folding knife. That is to say, the lower folding knife is forced to adjust a deformed curve to fit the curve of the lower pressing knife. From the perspective of precision compensation, it is equivalent to using one precision deviation to match another precision deviation, and the effect is poor. However, there are differences between Patents 1 and 2. Patent 1 adjusts the curvature of the lower folding knife by manually adjusting the wedge block. Moreover, the adjustment is inconvenient and can only be made during the installation and debugging of the machine tool or during maintenance, which is inconvenient to operate. In addition, since there are many wedge blocks, if the adjustment amount of each wedge block is inconsistent, it will also cause the wavy deformation of the lower folding knife, seriously affecting the processing accuracy. Although Patent 2 can achieve automatic adjustment, due to the large rigidity of the mechanical structure of the installation position of the lower folding knife, in order to achieve the compensation effect, a large driving load is required, and the cost is high, the mechanical structure is complex, and a larger specification driving motor is required. The actual use effect is poor and it is difficult to achieve practical application.

[0009] At present, there is also a method of increasing the thickness of the frame material to improve its mechanical structural rigidity. However, on the one hand, the material cost is very high and the economic efficiency is very poor; on the other hand, once the mold is worn, it cannot be compensated. Utility Model Content

[0010] The technical problem to be solved by the utility model is to provide a bending center lower pressing knife deflection compensation device in view of the deficiencies of the above-mentioned prior art. The bending center lower pressing knife deflection compensation device can realize deformation compensation for the lower pressing knife, and has the advantages of simple structure, low cost, safety and reliability, convenient adjustment and obvious effect. In addition, according to the needs of actual use scenarios, automatic compensation can be adopted, and real-time dynamic adjustment can be achieved, or a lower-cost manual adjustment method can be adopted.

[0011] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0012] A bending center lower pressing knife deflection compensation device comprises a compensation loading mechanism.

[0013] The lower pressing knife is installed on the top of the lower base at the bending center; a plurality of reinforcing plates are arranged at the bottom of the lower base.

[0014] At least one reinforcing plate is provided with an opening on its front side.

[0015] A compensating loading mechanism is arranged in each opening, and the compensating loading mechanism can expand the opening degree of the corresponding opening.

[0016] The front side surface of the reinforcing plate located in the middle is provided with an opening.

[0017] An opening is arranged on the front side of each reinforcing plate.

[0018] The compensating loading mechanism is an inclined wedge mechanism.

[0019] The oblique wedge mechanism comprises a wedge block and a transverse screw rod; the opening has a wedge-shaped opening, and the wedge block is located in the wedge-shaped opening; the transverse screw rod is arranged horizontally, and the wedge block is threadedly connected to the lower base; the transverse screw rod can be rotated manually or electrically.

[0020] The oblique wedge mechanism also includes an electric wrench 1; the electric wrench 1 can control the electric rotation of the transverse screw.

[0021] The compensating loading mechanism is a bidirectional threaded driving mechanism.

[0022] The bidirectional thread drive mechanism comprises a bidirectional screw rod, which is vertically arranged in the opening and has threads in opposite directions at both ends of the bidirectional screw rod.

[0023] The bidirectional thread drive mechanism also includes an electric wrench 2, which can control the electric rotation of the bidirectional screw.

[0024] The opening is a rectangular opening.

[0025] The utility model has the following beneficial effects:

[0026] 1. The present application has a simple structure and low cost, and can achieve the function of deflection compensation without increasing the cost.

[0027] 2. Due to the effect of deflection compensation, the present application can appropriately reduce the rigidity of the machine tool, thereby reducing the material cost of the machine tool and reducing the cost.

[0028] 3. The compensation loading mechanism of the present invention has a self-locking function, which is stable and reliable. Among them, when the inclined angle of the wedge block in the inclined wedge mechanism is small (such as 5 degrees), it will have a self-locking function. When the helix angle of the upper thread and the lower thread in the bidirectional thread drive mechanism is small, self-locking can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The schematic diagram of the structure of the bending center in the utility model is shown.

[0030] Figure 2 The deformation cloud diagram of the lower pressing blade under the horizontal bending load in the prior art is shown.

[0031] Figure 3 A schematic diagram of a bending center with an inclined wedge mechanism in the present application is shown.

[0032] Figure 4 An enlarged schematic diagram of the oblique wedge mechanism in the present application is shown.

[0033] Figure 5 A schematic diagram of a bending center with a bidirectional thread drive mechanism in the present application is shown.

[0034] Figure 6 An enlarged schematic diagram of the bidirectional thread drive mechanism in the present application is shown.

[0035] Figure 7 The deformation cloud diagram of the lower base after compensation by the compensating loading mechanism in this application is shown.

[0036] Figure 8 The deformation cloud diagram of the downward pressing knife after compensation by the compensating loading mechanism in this application is shown.

[0037] Fig. 9 The deformation curve diagram of the lower pressing knife after compensation by the compensating loading mechanism in the present application is shown.

[0038] Among them are:

[0039] 10. Frame; 11. Upper slide plate; 12. Lower base; 121. Reinforcement plate; 122. Opening;

[0040] 21. Upper pressing knife; 22. Lower pressing knife;

[0041] 30. Folding knife mounting frame; 31. Upper folding knife;

[0042] 40. Plates;

[0043] 50. Oblique wedge mechanism; 51. Wedge block; 52. Transverse screw;

[0044] 60. Bidirectional thread drive mechanism; 61. Bidirectional screw. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0046] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0047] like Figure 1 As shown, the bending center is used for bending a plate 40 , and includes a frame 10 , a pressing knife and a knife mounting frame 30 .

[0048] The frame has an upper slide plate 11 and a lower base 12 .

[0049] The upper slide plate can slide up and down along the frame.

[0050] like Figure 3 As shown, the bottom of the lower base is supported by a plurality of vertically arranged reinforcing plates 121, and an opening 122 is preferably provided in the middle of the front side of at least one reinforcing plate. In this embodiment, the reinforcing plates are preferably arranged vertically and parallel to each other. Further, it is preferred but not limited to select four reinforcing plates located in the middle to set openings, and the opening positions are set according to the compensation position required by the lower pressing knife; according to needs, the front side of each reinforcing plate can also be provided with openings preferably in the middle.

[0051] The pressing blades include an upper pressing blade 21 arranged at the bottom of the upper slide plate and a lower pressing blade 22 arranged at the top of the lower base.

[0052] A C-shaped folding knife mounting frame 30 is also installed at the bending center, which has an upper folding knife 31 and a lower folding knife.

[0053] like Figure 3 and Figure 5 As shown, a bending center downward pressure knife deflection compensation device includes a compensation loading mechanism.

[0054] A compensating loading mechanism is arranged in the opening of each reinforcing plate, for expanding the opening degree of the corresponding opening, thereby compensating for the bending deformation of the lower base.

[0055] The compensating loading mechanism of the present utility model has the following two preferred embodiments.

[0056] Embodiment 1: The compensation loading mechanism is a wedge mechanism

[0057] like Figure 3 and Figure 4 As shown, the wedge mechanism includes a wedge block 51 and a transverse screw 52.

[0058] The opening of each reinforcing plate has a wedge-shaped opening. In addition, according to needs, a rectangular cavity which is connected to the inner contraction end of the wedge-shaped opening and has the same cross-sectional area can be provided.

[0059] The wedge-shaped block is located in the wedge-shaped opening, and the transverse screw is arranged horizontally to threadably connect the wedge-shaped block with the lower base.

[0060] The transverse screw can be rotated manually or electrically. In this embodiment, the bevel mechanism also preferably includes an electric wrench 1; the electric wrench 1 can control the electric rotation of the transverse screw.

[0061] According to the deformation of the lower pressing knife, the opening that needs to be compensated is selected, and the transverse screw is rotated to press the wedge block into the wedge-shaped opening, so that the opening of the wedge-shaped opening will expand, thereby compensating for the bending deformation of the lower base and then compensating for the deformation of the lower pressing knife.

[0062] Embodiment 2: The compensation loading mechanism is a bidirectional thread drive mechanism

[0063] like Figure 5 and Figure 6 As shown, the bidirectional threaded drive mechanism includes a bidirectional screw 61 .

[0064] The opening of each reinforcing plate is preferably a rectangular opening, but may also be other shapes; the bidirectional screw is vertically arranged in the opening, and the two ends of the bidirectional screw have threads in opposite directions, namely an upper thread and a lower thread, wherein the upper thread is threadedly connected to the reinforcing plate located above the opening, and the lower thread is threadedly connected to the reinforcing plate located below the opening.

[0065] Furthermore, the bidirectional threaded drive mechanism preferably also includes an electric wrench 2, which can control the electric rotation of the bidirectional screw.

[0066] The present application uses a compensating loading mechanism to push the opening set on the reinforcing plate to expand, thereby achieving compensation of the deflection curve. The deformation cloud diagram of the lower base after compensation by the compensating loading mechanism is as follows: Figure 7 As shown in the figure; the deformation cloud diagram of the pressing knife after compensation by the compensation loading mechanism is shown in the figure. Figure 8 As shown in Figure 2, the deformation curve of the lower pressing knife after compensation by using the compensation loading mechanism is as follows: Fig. 9 As shown, the horizontal axis is the coordinate along the length of the tool, and the vertical axis is the deformation, both in mm. It can be seen that the compensation effect is very obvious. According to the current situation in the industry, when there is no compensation, the accuracy deviation is about 5 degrees, while the accuracy deviation of this application after compensation is about 0.5 degrees, and the accuracy level is greatly improved.

[0067] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A bending center lower pressure knife deflection compensation device, characterized in that: including a compensating loading mechanism; The lower pressing knife is installed on the top of the lower base at the bending center; a number of reinforcing plates are arranged at the bottom of the lower base; At least one reinforcing plate is provided with an opening on its front side; A compensating loading mechanism is arranged in each opening, and the compensating loading mechanism can expand the opening degree of the corresponding opening.

2. The bending center lower pressing knife deflection compensation device according to claim 1 is characterized in that: The front side surface of the reinforcing plate located in the middle is provided with an opening.

3. The bending center lower pressure knife deflection compensation device according to claim 1 is characterized in that: An opening is arranged on the front side of each reinforcing plate.

4. The bending center lower pressing knife deflection compensation device according to claim 1 is characterized in that: The compensating loading mechanism is an inclined wedge mechanism.

5. The bending center lower pressing knife deflection compensation device according to claim 4 is characterized in that: The oblique wedge mechanism comprises a wedge block and a transverse screw rod; the opening has a wedge-shaped opening, and the wedge block is located in the wedge-shaped opening; the transverse screw rod is arranged horizontally, and the wedge block is threadedly connected to the lower base; the transverse screw rod can be rotated manually or electrically.

6. The bending center lower pressing knife deflection compensation device according to claim 5 is characterized in that: The oblique wedge mechanism also includes an electric wrench 1; the electric wrench 1 can control the electric rotation of the transverse screw.

7. The bending center lower pressing knife deflection compensation device according to claim 1 is characterized in that: The compensating loading mechanism is a bidirectional threaded driving mechanism.

8. The bending center lower pressing knife deflection compensation device according to claim 7 is characterized in that: The bidirectional thread drive mechanism comprises a bidirectional screw rod, which is vertically arranged in the opening and has threads in opposite directions at both ends of the bidirectional screw rod.

9. The bending center lower pressing knife deflection compensation device according to claim 8 is characterized in that: The bidirectional thread drive mechanism also includes an electric wrench 2, which can control the electric rotation of the bidirectional screw.

10. The bending center lower pressing knife deflection compensation device according to claim 8, characterized in that: The opening is a rectangular opening.

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