Metal plate bending jig

Abstract

The utility model discloses a metal plate bending jig which comprises a fixing plate, a positioning strip, a nitrogen spring, a lifting plate and a linear driving motor. The top rear end of the fixing plate is provided with a positioning strip capable of sliding back and forth, the front section is provided with a through hole, and the bottom is provided with a nitrogen spring. The lifting plate slides up and down through cooperation of the sliding blocks and the positioning rod sliding grooves, and plates are placed when the top is flush with the positioning strips. The linear driving motor drives the positioning strip to move back and forth to adapt to different plate thicknesses. The positioning strip is provided with a positioning groove and a positioning pin, and an indicating grating is arranged at the rear end of the fixing plate to assist accurate positioning. After the plate is pressed, the hydraulic device presses the lifting plate downwards, bending is achieved through the fall between the positioning strip and the lifting plate, and the two ends are prevented from tilting. The bending device is compact in structure, accurate in positioning and adjustable in gap, and bending safety and machining efficiency are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of metal processing technology, and in particular to a sheet metal bending fixture. Background Technology

[0002] Sheet metal bending is a crucial process in metal processing, widely used in industries such as machinery manufacturing, automotive, and electronics. Traditional sheet metal bending equipment typically employs hydraulic or mechanical bending methods, applying pressure to the sheet metal using upper and lower dies to achieve bending. However, existing technologies suffer from several problems in practical applications. For instance, during the bending process, traditional bending equipment is prone to warping due to the lack of effective constraints at both ends of the sheet metal, leading to reduced bending accuracy and even material waste. Furthermore, the positioning function of existing equipment largely relies on manual adjustment, which is inefficient and inconsistent. Especially when processing sheets of different thicknesses or sizes, frequent fixture changes or adjustments are necessary, increasing operational complexity and time costs.

[0003] Some existing technologies attempt to improve positioning by adding fixing blocks or limit pins, but these solutions often lack flexibility. For example, some devices use fixed positioning strips, which prevent the gap from adaptively adjusting according to the sheet thickness. This can easily cause the sheet to jam during bending if the gap is too small, or affect the bending angle accuracy if the gap is too large. Furthermore, traditional devices pose safety risks; accidental displacement or rebound of the sheet during operation could cause injury to equipment and personnel. Although some patents (such as existing technologies not explicitly mentioned in the authorization announcement number) propose improvement solutions, they are mostly limited to local structural optimizations and fail to systematically address the comprehensive issues of positioning, adjustment, and safety. Therefore, there is an urgent need for a sheet metal bending fixture with a reasonable structure, flexible operation, and high safety to improve processing efficiency and product quality. Utility Model Content

[0004] The purpose of this utility model is to provide a sheet metal bending fixture to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A sheet metal bending fixture includes a fixed plate, a positioning strip fixedly installed at the top rear end of the fixed plate, a plurality of through holes evenly distributed from left to right at the top front section of the fixed plate, the through holes penetrating the fixed plate vertically, a support block fixedly installed at the bottom of the fixed plate, and a nitrogen spring corresponding to each through hole fixedly installed at the bottom of the fixed plate; the top end of the nitrogen spring passes through the through hole from bottom to top and extends above the through hole; a lifting plate is installed at the top front end of the fixed plate, the lifting plate is slidably installed on the top of the fixed plate, and when the lifting plate is at its highest position, its top surface is flush with the top surface of the positioning strip.

[0007] By adopting the above technical solution, when the sheet material to be bent is placed on the top of the lifting plate, the hydraulic device drives the pressure plate, which is the same size as the edge of the lifting plate, to press down and continue to press down. The sheet material above the positioning strip is restricted by the positioning strip, which causes a drop between the positioning strip and the top surface of the lifting plate, thereby realizing the bending function. This setting avoids the problem that both ends of the sheet material will warp when bending in traditional bending devices, making the device safer.

[0008] In a further embodiment, the top rear end of the positioning strip is provided with multiple positioning grooves from left to right, and a positioning pin is fixedly installed in each positioning groove.

[0009] By adopting the above technical solution, when the lifting plate is at its highest point, the plate is placed, and the cooperation of multiple positioning pins restricts the rear of the plate, achieving rapid positioning.

[0010] In a further embodiment, upward positioning rods are fixedly installed on the front sides of both the left and right ends of the fixed plate. The cross-section of the positioning rods is rectangular. A vertically penetrating groove is provided on the side of the two positioning rods that are close to each other. Slider blocks are slidably installed in the grooves on both the left and right sides of the lifting plate.

[0011] In a further embodiment, a linear drive motor is fixedly installed at the bottom of the fixing plate, and slide rails are provided on both sides of the top rear end of the fixing plate. The positioning strip is slidably installed on the slide rails, and a downward connecting protrusion is provided at the middle position of the rear bottom end of the positioning strip. The downward connecting protrusion is fixedly connected to the moving part of the linear drive motor, and the linear drive motor is used to drive the positioning strip to slide back and forth.

[0012] By adopting the above technical solution, because the thickness of the sheet material is different, the gap between the front end of the positioning strip and the rear end of the lifting plate needs to be adjusted within a certain range according to the thickness, so as to avoid the problem that the sheet material will get stuck in the gap due to insufficient gap when bending.

[0013] In a further embodiment, an indicator grating is provided at the top rear end of the fixing plate.

[0014] By adopting the above technical solution, the position of the board can be better indicated. By setting the bend line on the board that needs to be bent, the position can be checked again before bending begins, thus avoiding bending errors.

[0015] In a further embodiment, a support plate is fixedly installed on the bottom of the fixing plate, the support plate is used to fix the nitrogen spring, and equal-height pads are provided on opposite sides of the bottom of the fixing plate.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. When the sheet material to be bent is placed on top of the lifting plate, a hydraulic device is used to drive a pressure plate with the same edge size as the lifting plate to press it down. The sheet material above the positioning strip is restricted by the positioning strip, which causes a drop between the positioning strip and the top surface of the lifting plate, thereby achieving the bending function. This setting avoids the problem that both ends of the sheet material will warp when bending in traditional bending devices, making the device safer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the arrangement of the support block and nitrogen spring in this utility model.

[0020] In the diagram, 1 is the fixed plate; 2 is the positioning strip; 3 is the support block; 4 is the nitrogen spring; 5 is the lifting plate; and 6 is the linear drive motor. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0023] Example 1:

[0024] like Figures 1-2As shown, a sheet metal bending fixture includes a fixed plate 1. A positioning strip 2 is fixedly installed on the top rear end of the fixed plate 1. Multiple through holes evenly distributed from left to right are provided on the top front section of the fixed plate 1, penetrating the fixed plate 1 vertically. A support block 3 is fixedly installed on the bottom of the fixed plate 1. Nitrogen springs 4, corresponding to the through holes, are fixedly installed on the bottom of the fixed plate 1. The top of the nitrogen springs 4 passes through the through holes from bottom to top and extends above the through holes. A lifting plate 5 is installed on the top front end of the fixed plate 1. The lifting plate 5 slides vertically on the top of the fixed plate 1. When the lifting plate 5 is at its highest position, its top surface is flush with the top surface of the positioning strip 2. Multiple positioning grooves are provided from left to right on the top rear end of the positioning strip 2, and a positioning pin is fixedly installed in each positioning groove. The front and rear ends of the fixed plate 1... Each side is fixedly equipped with an upward-facing positioning rod. The cross-section of the positioning rod is rectangular. A vertically penetrating groove is provided on the side where the two positioning rods are close to each other. Slider blocks are provided on both the left and right sides of the lifting plate 5 and are slidably installed in the groove. A linear drive motor 6 is fixedly installed at the bottom of the fixed plate 1. Slide rails are provided on both sides of the top rear end of the fixed plate 1. The positioning strip 2 is slidably installed on the slide rails. A downward connecting protrusion is provided at the middle position of the bottom rear end of the positioning strip 2. The downward connecting protrusion is fixedly connected to the moving part of the linear drive motor 6. The linear drive motor 6 is used to drive the positioning strip 2 to slide back and forth. An indicator grating is provided at the top rear end of the fixed plate 1. A support plate is fixedly installed at the bottom of the fixed plate 1. The support plate is used to fix the nitrogen spring 4. Equal height pads are provided on opposite sides of the bottom of the fixed plate 1.

[0025] Specific implementation process: When the sheet material to be bent is placed on top of the lifting plate, a hydraulic device drives a pressure plate with the same edge size as the lifting plate to press it down. The sheet material above the positioning strip is restricted by the positioning strip, creating a height difference between the positioning strip and the top surface of the lifting plate, thus achieving the bending function. This design avoids the problem of the sheet material's ends warping during bending in traditional bending devices, making the device safer. A nitrogen spring supports the lifting plate and the positioning strip to create a height difference. During bending, the rear end of the sheet material is restricted by the positioning strip, while the front end moves downward with the lifting plate, preventing warping at both ends and improving bending accuracy and safety.

[0026] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A sheet metal bending fixture, characterized in that: The device includes a fixed plate (1), a positioning strip (2) is fixedly installed at the top rear end of the fixed plate (1), a plurality of through holes are provided at the top front section of the fixed plate (1) from left to right, the through holes penetrate the fixed plate (1) vertically, a support block (3) is fixedly installed at the bottom of the fixed plate (1), and a nitrogen spring (4) corresponding to the through hole is fixedly installed at the bottom of the fixed plate (1); the top of the nitrogen spring (4) passes through the through hole from bottom to top and extends to the top of the through hole; a lifting plate (5) is installed at the top front end of the fixed plate (1), the lifting plate (5) is slidably installed on the top of the fixed plate (1), and when the lifting plate (5) is at the topmost position, the top surface of the lifting plate (5) is flush with the top surface of the positioning strip (2).

2. The sheet metal bending fixture according to claim 1, characterized in that: The top rear end of the positioning strip (2) is provided with multiple positioning grooves from left to right, and a positioning pin is fixedly installed in each positioning groove.

3. The sheet metal bending fixture according to claim 1, characterized in that: The front sides of both ends of the fixed plate (1) are fixedly equipped with upward positioning rods. The cross-section of the positioning rods is rectangular. The two positioning rods are provided with a vertically penetrating groove on the side that is close to each other. The left and right sides of the lifting plate (5) are provided with sliders that are slidably installed in the grooves.

4. A sheet metal bending fixture according to claim 1, characterized in that: A linear drive motor (6) is fixedly installed at the bottom of the fixed plate (1). Slide rails are provided on both sides of the top rear end of the fixed plate (1). The positioning strip (2) is slidably installed on the slide rails. A downward connecting protrusion is provided at the middle position of the bottom rear side of the positioning strip (2). The downward connecting protrusion is fixedly connected to the moving part of the linear drive motor (6). The linear drive motor (6) is used to drive the positioning strip (2) to slide back and forth.

5. A sheet metal bending fixture according to claim 1, characterized in that: An indicator grating is provided at the top rear end of the fixing plate (1).

6. A sheet metal bending fixture according to claim 1, characterized in that: A support plate is fixedly installed at the bottom of the fixing plate (1), and the support plate is used to fix the nitrogen spring (4). Equal height pads are provided on opposite sides of the bottom of the fixing plate (1).

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