A positioning fixture for a bending machine

Abstract

This utility model discloses a positioning fixture for a bending machine, belonging to the technical field of sheet metal processing equipment. It includes a frame, a movable table, a stop, a transmission assembly, and a lateral support assembly. The movable table is mounted on the frame, the stop is mounted on the movable table, the transmission assembly is mounted on the stop, and the lateral support assembly is connected to the transmission assembly. This positioning fixture for a bending machine, through the coordinated work of the transmission assembly and the lateral support assembly, effectively supports the side of the sheet metal part while the stop performs end-face positioning. This structure can disperse the stress generated during bending and prevent deformation of the formed part.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing equipment technology, specifically a positioning fixture for a bending machine. Background Technology

[0002] A bending machine is an industrial device used to bend and shape metal sheets. It is widely used in the sheet metal processing field, especially for making various box structures. In the box processing process, the edges of the sheet metal parts need to be bent multiple times to form a three-dimensional box body. This process requires precise positioning of the bending position and ensuring that the formed part is not affected.

[0003] In existing technologies, bending machines typically use a stop as the main positioning element. The stop is moved in space by a moving table, so that it comes into contact with the edge of the sheet metal to be bent. In practice, the stop moves along the X, Y, and Z axes to a predetermined position under the command of the control system. Its position is defined by direct contact with the sheet metal, thereby ensuring the accuracy of the bending line. This method has a simple structure, is easy to operate, and can meet the bending requirements of general precision.

[0004] However, this method of single-point positioning using only a stop has obvious drawbacks. When bending one side of the box, the huge bending stress will cause complex deformation of the sheet metal. This deformation will be transmitted to the adjacent box body that has been initially formed, causing it to twist or dent. Since the existing stop only provides resistance in one direction, it cannot provide effective support and protection for the side of the adjacent box body, resulting in a decrease in the dimensional accuracy of the final formed box body and difficulty in ensuring the flatness of the box body, which seriously affects the product quality. This problem is particularly prominent when processing thin-walled or large-sized boxes. Utility Model Content

[0005] The purpose of this utility model is to solve the problems in the prior art by proposing a positioning fixture for a bending machine.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a positioning fixture for a bending machine, comprising: frame; A movable tabletop is mounted on the rack. A stop, set on the movable table, is used to abut the end face of the sheet metal part; The transmission component is mounted on the stop. Lateral support assembly, connected to the transmission assembly, is used to abut against the side of the sheet metal part when the transmission assembly is triggered.

[0007] The present invention is further configured such that: the transmission assembly includes a groove formed on the end face of the stop, an elastic reset assembly disposed in the groove, an active block connected to the elastic reset assembly and capable of sliding along the groove, and a connecting rod assembly connected to the active block and the lateral support assembly respectively.

[0008] The present invention is further configured such that the connecting rod assembly includes a first shaft fixed to the stop, a second shaft fixed to the drive block, and a crossbar movably sleeved on the first shaft and the second shaft.

[0009] The present invention is further configured such that: a plurality of crossbars are provided along the length direction of the slide groove.

[0010] The present invention is further configured such that: the elastic reset component is a reset spring, with its two ends respectively abutting the bottom of the slide groove and the active block.

[0011] The present invention is further configured such that: the lateral support assembly includes a vertical rod fixedly connected to the transmission assembly, a sliding member slidably connected to the vertical rod, an elastic buffer assembly disposed between the sliding member and the vertical rod, and a roller rotatably disposed on the sliding member.

[0012] The present invention is further configured such that: the elastic buffer component is a relief spring, and its two ends respectively abut against the sliding member and the vertical rod.

[0013] The present invention is further configured such that the outer circumferential surface of the roller is covered with an elastic material layer.

[0014] In summary, this utility model has the following beneficial effects: through the coordinated work of the transmission component and the lateral support component, while the stopper positions the end face, it achieves effective support for the side of the sheet metal part. This structure can disperse the stress generated during the bending process and prevent the formed part from deforming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0016] In the diagram: 1. Frame; 2. Stopper; 201. Slide groove; 3. Moving table; 4. Horizontal bar; 5. Vertical bar; 6. Sliding component; 7. Yield spring; 8. Roller; 9. First shaft; 10. Second shaft; 11. Driving block; 12. Return spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] A positioning fixture for a bending machine, such as Figures 1 to 4 As shown, it consists of a frame 1, a movable table 3, a stop 2, a transmission assembly, and a lateral support assembly. The frame 1 is made of metal and provides a stable mounting base for the entire positioning fixture. The movable table 3 is mounted on the frame 1 via a guide rail mechanism. The movable table 3 is driven by a servo motor and can move and position in the Y and Z axes. The stop 2 is mounted on the movable table 3 via a linear guide rail and is driven by a cylinder to achieve telescopic positioning in the X-axis direction. The transmission assembly is integrated inside the stop 2, and includes a slide groove 201, a return spring 12, an active block 11, and a connecting rod assembly. The slide groove 201 is opened on the end face of the stop 2 facing the sheet metal part and extends horizontally. The return spring 12 is installed inside the slide groove 201, with one end fixed to the bottom of the slide groove 201 and the other end connected to the active block 11. The active block 11 is made of wear-resistant material and its shape matches the slide groove 201, allowing it to slide smoothly within the slide groove 201. The connecting rod assembly consists of a first shaft 9, a second shaft 10, and a crossbar 4. The first shaft 9 is fixed on the stop 2, the second shaft 10 is vertically fixed on the active block 11, and the crossbar 4 is simultaneously sleeved on the first shaft 9 and the second shaft 10, forming a rotatable connection structure. Multiple crossbars 4 are arranged along the length of the slide groove 201, forming a parallel linkage mechanism.

[0019] like Figure 3 as well as Figure 4 As shown, the lateral support assembly is connected to the transmission assembly and includes a vertical rod 5, a sliding member 6, a relief spring 7, and a roller 8. The vertical rod 5 is made of rigid material and its top end is fixedly connected to the end of the horizontal rod 4. The sliding member 6 forms a sliding fit with the vertical rod 5 through a guide mechanism and can move vertically on the vertical rod 5. The relief spring 7 is installed between the sliding member 6 and the vertical rod 5 to provide elastic cushioning. The roller 8 is installed at the end of the sliding member 6 through a bearing, and its outer circumferential surface is covered with a polyurethane elastic layer, which not only ensures the support effect but also avoids scratching the surface of the workpiece. The various components of the positioning fixture cooperate with each other through mechanical structure to form a complete working system. The transmission component and the lateral support component realize motion transmission through the horizontal bar 4 and the vertical bar 5, ensuring that when the active block 11 is under pressure, it can drive the roller 8 to abut against the side of the sheet metal part in a timely manner.

[0020] Beneficial effects: Through the coordinated work of the transmission component and the lateral support component, the end face positioning of the stop 2 is achieved while the side of the sheet metal part is effectively supported. This structure can disperse the stress generated during bending and prevent deformation of the formed part. The setting of multiple crossbars 4 makes the support force distribution more uniform and improves the stability of the system. The combination of roller 8 and elastic material not only ensures the support effect but also avoids damage to the workpiece surface. The fixture has the characteristics of compact structure, sensitive response and accurate positioning, which significantly improves the processing quality and production efficiency of box-type workpieces.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning fixture for a bending machine, characterized in that: include: Rack (1); A movable table (3) is mounted on the frame (1); A stop (2) is set on the movable table (3) and is used to abut the end face of the sheet metal part; The transmission component is mounted on the stop (2); Lateral support assembly, connected to the transmission assembly, is used to abut against the side of the sheet metal part when the transmission assembly is triggered.

2. The positioning fixture for a bending machine according to claim 1, characterized in that: The transmission assembly includes a groove (201) opened on the end face of the stop (2), an elastic reset assembly disposed in the groove (201), an active block (11) connected to the elastic reset assembly and capable of sliding along the groove (201), and a connecting rod assembly connected to the active block (11) and the lateral support assembly respectively.

3. A positioning fixture for a bending machine according to claim 2, characterized in that: The linkage assembly includes a first shaft (9) fixed to the stop (2), a second shaft (10) fixed to the drive block (11), and a crossbar (4) movably sleeved on the first shaft (9) and the second shaft (10).

4. A positioning fixture for a bending machine according to claim 3, characterized in that: The crossbar (4) is provided in several places along the length of the slide groove (201).

5. A positioning fixture for a bending machine according to claim 2, characterized in that: The elastic reset component is a reset spring (12), whose two ends abut against the bottom of the slide groove (201) and the active block (11) respectively.

6. A positioning fixture for a bending machine according to claim 1, characterized in that: The lateral support assembly includes a vertical rod (5) fixedly connected to the transmission assembly, a sliding member (6) slidably connected to the vertical rod (5), an elastic buffer assembly disposed between the sliding member (6) and the vertical rod (5), and a roller (8) rotatably disposed on the sliding member (6).

7. A positioning fixture for a bending machine according to claim 6, characterized in that: The elastic buffer assembly is a relief spring (7), whose two ends abut against the sliding member (6) and the vertical rod (5) respectively.

8. A positioning fixture for a bending machine according to claim 6, characterized in that: The outer circumferential surface of the roller (8) is covered with an elastic material layer.

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