Positioning mechanism for rear material blocking device of bending machine

Abstract

The utility model discloses a positioning mechanism for a rear material blocking device of a bending machine, which is used for positioning a product with a positioning reference as a reference point and a positioning bevel edge, and comprises a first rear material blocking block, a second rear material blocking block, a bevel edge positioning clamp and a positioning block, and the positioning block is provided with an inclined positioning edge corresponding to the positioning bevel edge of the product, the positioning block is mounted on the second rear stop block and provided with a positioning surface, and the positioning surface is in contact with the datum point of the product and the inclined positioning edge is in contact with the positioning bevel edge, so that the product is positioned. The positioning mechanism for the rear material blocking device of the bending machine is simple in structure and reliable in positioning, the manufacturing cost in the bending forming process can be reduced, the period is shortened, and the product quality is improved.

Description

Technical Field

[0001] The present application relates to the field of mechanical manufacturing technology, and in particular to a positioning mechanism for a rear stopper of a bending machine. Background Art

[0002] Sheet metal parts are widely used in the automotive, aerospace, and other fields due to their light weight, high strength, and excellent rigidity. Various instruments, distribution cabinets, and equipment housings and casings are formed from sheet metal. CNC press brakes, known for their precision, convenience, and high efficiency, are used in sheet metal production. Common CNC press brakes feature 3+1 or 4+1 axes, with sliders controlling the up-and-down movement of the press brake (Y1 / Y2 axes) to control the sheet metal's horizontal angle, and the X-axis to control the sheet metal's horizontal length. Synchronous forward and backward movement of the back gauge controls the closing height of the bend (R-axis), and mechanical deflection compensation (W-axis) allows for the lifting of long sheets and ensures a level bend. Conventional press brakes, without a back gauge, instead feature step-by-step forward and backward movement (R1 / R2) and vertical and horizontal movement (Z1 / Z2), making them suitable for producing products requiring horizontal bending positioning dimensions.

[0003] The multi-axis CNC bending machine adds two axes of step-by-step movement of the back gauge (R1 / R2) and movement in the vertical direction of the back gauge (Z1 / Z2) to the ordinary bending machine, so as to adapt to different unfolding sizes more flexibly.

[0004] In addition, without improving the equipment capacity of the bending machine, the 3-axis and 4-axis bending machines have clear requirements for the unfolding size. The unfolding size must have 2 positioning ends on the same horizontal line, and the position of the positioning end is in contact with the back gauge to achieve plate positioning.

[0005] The unfolded sizes and structures of metal structural parts with bending capabilities are different. The bending forming of products can be achieved by increasing the equipment capacity of the bending machine or changing the structural size of the unfolded material. However, the former requires a higher initial investment in equipment, while the latter results in a greater waste of raw materials.

[0006] However, in the production and manufacturing process of this type of sheet metal, it is necessary to comprehensively consider the economic efficiency, production cycle and product quality requirements, and produce products that meet the requirements with minimal investment and a shorter development cycle.

[0007] How to achieve low manufacturing cost, short cycle and high product quality in the bending forming process is a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0008] In order to solve the above technical problems, the purpose of the utility model is to provide a positioning mechanism for the rear gauge device of a bending machine, so that the bending forming process has low manufacturing cost, short cycle and high product quality.

[0009] The technical solutions provided by this utility model are as follows:

[0010] A positioning mechanism for a rear stop device of a bending machine is used to position a product with a positioning reference as a reference point and a positioning bevel, comprising a first rear stop block, a second rear stop block, a bevel positioning fixture, and a positioning block. The bevel positioning fixture is installed on the first rear stop block and is provided with an oblique positioning edge corresponding to the product positioning bevel. The positioning block is installed on the second rear stop block and is provided with a positioning surface. The positioning surface contacts the product reference point and the oblique positioning edge contacts the positioning bevel to achieve positioning of the product.

[0011] Preferably, the oblique positioning edge has the same oblique angle as the product positioning oblique edge, so that the oblique positioning edge corresponds to the product positioning oblique edge.

[0012] Preferably, the oblique positioning edge is in the shape of a step, having a vertical surface for positioning the product and a tread for lifting the product.

[0013] Preferably, the bevel positioning clamp has two bevel positioning edges, and the two bevel positioning edges are symmetrically arranged.

[0014] Preferably, the bevel positioning fixture includes a triangular bevel positioning portion, and the two bevel positioning edges are located on the bevel sides of the triangular bevel positioning portion.

[0015] Preferably, the bevel positioning fixture includes a fixing portion for fixing to the first rear stop block, and the fixing portion is connected to the bottom edge of the triangular bevel positioning portion.

[0016] Preferably, the bevel positioning fixture is fixed to the first rear stop block by means of bolts and a fixing block.

[0017] Preferably, the positioning block is embedded in the second rear stop block to increase the positioning height.

[0018] Preferably, the positioning block has two positioning surfaces, and the two positioning surfaces are symmetrically arranged.

[0019] Preferably, a connecting block is further included, wherein the connecting block clamps and fixes the first rear stop block and the second rear stop block to prevent the first rear stop block and the second rear stop block from moving left and right.

[0020] Compared to existing technologies, the positioning mechanism for the rear stop of a press brake is designed in this invention. By installing a bevel positioning fixture and a positioning block on the first and second rear stop blocks, the bevel positioning fixture's beveled positioning edge contacts the product's beveled positioning edge, while the positioning block's positioning surface contacts the product's reference point, achieving product positioning. This positioning mechanism has a simple structure and reliable positioning, which can reduce manufacturing costs, shorten cycle times, and improve product quality during the bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a product to be bent applied to the positioning mechanism of the rear stop device of a bending machine according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 The structural diagram of the positioning mechanism of the rear stop device of the bending machine is shown;

[0024] Figure 3 for Figure 1 A three-dimensional diagram of a bevel positioning fixture used in a positioning mechanism for a rear stopper of a bending machine;

[0025] Figure 4 for Figure 3 A three-dimensional view of the bevel positioning fixture from another angle;

[0026] Figure 5 for Figure 3 Schematic diagram of the combination of the bevel positioning fixture and the first rear stop block;

[0027] Figure 6 for Figure 1 The figure shows a schematic diagram of the combination of the connecting block, the first rear stop block and the second rear stop block in the positioning mechanism of the rear stop device of the bending machine. DETAILED DESCRIPTION

[0028] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0029] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0033] like Figures 1 to 6 As shown, the embodiment of the present invention provides a positioning mechanism for the rear stopper of a bending machine, which is used to position a product 1 with a positioning reference point 11 and a positioning bevel 12. Figure 1 The sheet shown is a semi-finished product that requires a second bend (the first bend line is indicated by the dotted line A) after a single bend (the first bend line is indicated by the dotted line A). During the second bend, the contact point with the back gauge (reference point 11) is a point contact, making it impossible to locate the product using a conventional press brake. This is because the other positioning edge is a bevel (positioning bevel 12). Although a multi-axis CNC press brake has back-gauge axis R1 / R2 feed motion, it still cannot directly locate the bevel.

[0034] The positioning mechanism of the rear stop device of the bending machine in this embodiment includes a first rear stop block 2, a second rear stop block 3, a bevel positioning fixture 4, a positioning block 5, and a connecting block 6. The bevel positioning fixture 4 is installed on the first rear stop block 2 and is provided with an oblique positioning edge 41 corresponding to the product positioning bevel 12. The positioning block 5 is installed on the second rear stop block 3 and is provided with a positioning surface 51. The positioning surface 51 contacts the product reference point 11 and the oblique positioning edge 41 contacts the positioning bevel 12 to achieve product positioning.

[0035] In this embodiment, the first rear stopper 2 and the second rear stopper 3 both include a front end and a rear end. The width of the front end is greater than that of the rear end, and the width of the front end may be 100 mm.

[0036] In this embodiment, the connecting block 6 clamps and secures the first rear stop 2 and the second rear stop 3 to prevent the first rear stop 2 and the second rear stop 3 from moving left and right and causing dimensional deviation. In this embodiment, the connecting block 6 can be machined from No. 45 steel and has a length of 267 mm, a width of 40 mm, and a height of 20 mm. The connecting block 6 is secured to the first rear stop 2 and the second rear stop 3 using an inlaid structure. In other embodiments, the connecting block 6 may not be provided, and other methods may be used to prevent the first rear stop 2 and the second rear stop 3 from moving left and right.

[0037] In this embodiment, the oblique positioning edge 41 has the same oblique angle as the product positioning oblique edge 12, so that the oblique positioning edge 41 corresponds to the product positioning oblique edge 12. Specifically, the oblique positioning fixture 4 is arrow-shaped as a whole, including a triangular oblique positioning portion 42 and a fixing portion 43. The oblique sides of the triangular oblique positioning portion 42 respectively form oblique positioning edges 41, so that the oblique positioning fixture 4 has two oblique positioning edges 41, and the two oblique positioning edges 41 are symmetrically arranged, so that the oblique positioning fixture 4 can be positioned on both sides, improving applicability. The oblique positioning edge 41 is step-shaped, with a vertical surface 411 for positioning the product and a tread 412 for lifting the product (such as Figure 3 、 Figure 4 As shown). A lightening hole 44 is also provided in the middle of the oblique positioning portion 42 to reduce the weight of the clamp itself. The fixing portion 43 is connected to the bottom edge of the triangular oblique positioning portion 42 and is used to be fixed to the first rear stop block 2. The fixing portion 43 (which is provided with two threaded holes) is fixed to the first rear stop block 2 by bolts (not shown) and the fixing block 7. The bevel positioning clamp 4 can be machined from No. 45 steel. The maximum thickness of the clamp is 20 mm, the maximum width is 320 mm, and the maximum length is 330 mm. The length of the fixing portion is 130 mm and the width is 100 mm (consistent with the width of the front end of the first rear stop block 2 and greater than the width of the rear end). The diameter of the lightening hole is 100 mm. The bolt specification can be M8, and the fixing block can be machined from No. 45 steel, with a length of 100 mm, a width of 30 mm, and a height of 30 mm.

[0038] In this embodiment, a positioning block 5 is embedded in the second rear stop 3 to increase the positioning height and change the positioning reference. The positioning block 5 has two symmetrical positioning surfaces 51, allowing for bilateral positioning and improving applicability. The positioning block 5 can be machined from 45-gauge steel and is 150 mm long, 30 mm wide, and 30 mm high.

[0039] During use, after obtaining a flat sheet of material according to the unfolding procedure, a conventional bending machine is used to bend it 90° along the first bending line. At this time, the reference points corresponding to the second bending line are the reference point 11 and the positioning bevel 12. The positioning mechanism of this embodiment is installed on the conventional bending machine, and the reference point 11 is brought into contact with the positioning surface 51 of the positioning block 5, and the positioning bevel 12 is brought into contact with the bevel positioning edge 41 of the bevel positioning fixture 4, thereby achieving positioning for the second bend and completing the bend.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning mechanism for a rear gauge device of a bending machine, used for positioning a product with a positioning reference as a reference point and a positioning bevel, characterized in that: It includes a first rear stop block, a second rear stop block, a bevel positioning fixture, and a positioning block. The bevel positioning fixture is installed on the first rear stop block and is provided with an oblique positioning edge corresponding to the product positioning bevel. The positioning block is installed on the second rear stop block and is provided with a positioning surface. The positioning surface contacts the product reference point and the oblique positioning edge contacts the positioning bevel to achieve product positioning.

2. The positioning mechanism for the rear stopper of a bending machine according to claim 1, characterized in that: The oblique positioning edge has the same oblique angle as the product positioning oblique edge, so that the oblique positioning edge corresponds to the product positioning oblique edge.

3. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The oblique positioning edge is in the shape of a step, and has a vertical surface for positioning the product and a tread surface for lifting the product.

4. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The bevel positioning fixture has two bevel positioning edges, and the two bevel positioning edges are symmetrically arranged.

5. The positioning mechanism for the rear stopper of a bending machine according to claim 4, characterized in that: The oblique edge positioning fixture comprises an oblique positioning portion in a triangular shape, and two oblique positioning edges are located on the oblique edges of the triangular oblique positioning portion.

6. The positioning mechanism for the rear gauge device of a bending machine according to claim 5, characterized in that: The oblique edge positioning fixture includes a fixing portion for fixing to the first rear stop block, and the fixing portion is connected to the bottom edge of the triangular oblique positioning portion.

7. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The bevel positioning fixture is fixed to the first rear stop block through bolts and a fixing block.

8. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The positioning block is embedded in the second rear stop block to increase the positioning height.

9. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The positioning block has two positioning surfaces, and the two positioning surfaces are symmetrically arranged.

10. The positioning mechanism for the rear gauge device of a bending machine according to claim 1, characterized in that: The invention also includes a connecting block, which clamps and fixes the first rear stop block and the second rear stop block to prevent the first rear stop block and the second rear stop block from moving left and right.

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