Small punching machine

Abstract

The utility model discloses a small-sized punching machine, which comprises a base, a lifting plate, a pressure head and a lower die, the lifting plate is arranged on the base and ascends and descends on the base, the pressure head and the lower die are arranged on the lifting plate, the lower die is connected with the base in a sliding mode, and right-angle frames are arranged on the base and located on the two sides of the lower die, and corner positions of the right-angle frames are connected with the base in a rotating mode. The front end of the right-angle frame is movably connected with the corresponding side face of the lower die, pressing rods are symmetrically arranged on the lifting plate and matched with the rear end of the right-angle frame, and the lower die is connected with the front end of the base through an extension spring. A workpiece is placed on the lower die, then the lifting plate descends, the right-angle frame rotates backwards under the action of the pressing rod, the lower die is driven to overcome the elastic force of the extension spring to slide backwards, the pressing head corresponds to the position, needing to be punched, of the workpiece, and therefore punching operation is achieved. Afterwards, the lifting plate ascends, the pressing rod ascends along with the lifting plate, the lower die moves forwards and resets under the action of the extension spring, and the workpiece is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of stamping, specifically a small punch press. Background Technology

[0002] A punch press is a type of stamping press mainly used for punching, forming, stretching, trimming, fine blanking, riveting, and extrusion of metal sheets. The working principle of a punch press is to convert circular motion into linear motion. A main motor drives a flywheel, which in turn drives gears, a crankshaft (or eccentric gear), and connecting rods via a clutch, thus achieving the linear motion of a slide block. Under pressure, the slide block drives the punch to process the workpiece.

[0003] However, in existing punch presses, the lower die is fixed. When placing the workpiece, if the upper die rises only slightly, it will interfere with the placement of the workpiece. Utility Model Content

[0004] The purpose of this invention is to solve the above problems by providing a small punch press with a movable lower die that is offset from the upper die, which facilitates workpiece placement.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A small punch press includes a base, a lifting plate mounted on the base and raised and lowered on the base, a press head and a lower die mounted on the lifting plate, the lower die being slidably connected to the base, right-angle brackets being provided on both sides of the lower die at corner positions and rotatably connected to the base, the front end of the right-angle brackets being movably connected to the corresponding side of the lower die, pressure rods being symmetrically provided on the lifting plate, the pressure rods cooperating with the rear end of the right-angle brackets, and the lower die being connected to the front end of the base by a tension spring.

[0007] Furthermore, the right-angle frame is provided with a first elongated hole, and the side of the lower mold is provided with a guide rod that cooperates with the first elongated hole.

[0008] Furthermore, a groove is provided at the bottom of the front side of the first elongated hole.

[0009] Furthermore, the rear end of the right-angle frame is provided with rollers that cooperate with the pressure rod.

[0010] Furthermore, the base is provided with a column that passes through the lifting plate and is slidably connected to the lifting plate. The base is provided with a vertical plate, and the vertical plate is provided with a swing arm whose rear end is rotatably connected to the vertical plate. The middle position of the swing arm is connected to the upper end of the pressure head through a connecting rod.

[0011] Furthermore, the lower mold is provided with a positioning mechanism for positioning the workpiece.

[0012] Furthermore, the positioning mechanism includes a positioning block mounted on the lower mold and right-angle plates respectively disposed on the rear side and the right side of the positioning block, the lower end of the right-angle plates extending into the positioning block and sliding within the positioning block.

[0013] Furthermore, the bottom of the right-angle plate is provided with a second elongated hole.

[0014] The beneficial effects of this utility model are:

[0015] 1. In this utility model, the lower die and the base are slidably connected. Right-angle brackets are provided on both sides of the lower die at corner positions, rotatably connected to the base. The front end of each right-angle bracket is movably connected to the corresponding side of the lower die. Pressure rods are symmetrically arranged on the lifting plate, and the pressure rods cooperate with the rear ends of the right-angle brackets. The lower die and the front end of the base are connected by a tension spring. Under normal circumstances, the lifting plate is at its uppermost position. Under the action of the tension spring, the lower die is at its foremost position. The workpiece is placed on the lower die, and then the lifting plate descends. Under the action of the pressure rods, the right-angle brackets rotate backward, driving the lower die to slide backward against the elastic force of the tension spring, so that the pressure head corresponds to the position where a hole needs to be opened on the workpiece, thereby realizing the punching operation. Afterward, the lifting plate rises, and the pressure rods rise accordingly. Under the action of the tension spring, the lower die moves forward to reset, facilitating workpiece replacement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is the left view of the present invention;

[0019] Figure 3 This is a schematic diagram of the positioning mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the positioning mechanism of this utility model.

[0021] In the diagram: 1. Base, 2. Lifting plate, 3. Press head, 4. Lower mold, 5. Right angle frame, 6. Press rod, 7. Tension spring, 8. First elongated hole, 9. Guide rod, 10. Groove, 11. Roller, 12. Column, 13. Upright plate, 14. Swing arm, 15. Connecting rod, 16. Positioning block, 17. Right angle plate, 18. Second elongated hole. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0023] like Figure 1 and Figure 2 As shown, a small punch press includes a base 1, a lifting plate 2 mounted on the base 1 and raised and lowered on the base 1, a pressure head 3 mounted on the lifting plate 2, and a lower die 4. The lower die 4 is slidably connected to the base 1 via a guide rail slider. Right-angle frames 5 are provided on both sides of the lower die 4 at corner positions and rotatably connected to the base 1. A support is provided on the base 1, and the corner positions of the right-angle frames 5 are rotatably connected to the support. The front end of the right-angle frames 5 is movably connected to the corresponding side of the lower die 4. Pressure rods 6 are symmetrically provided on the lifting plate 2, and the pressure rods 6 cooperate with the rear ends of the right-angle frames 5. The lower die 4 is connected to the front end of the base 1 via a tension spring 7. Under normal conditions, the lifting plate 2 is at its uppermost position. Under the action of the tension spring 7, the lower die 4 is at its foremost position. When a workpiece is placed on the lower die 4, the lifting plate 2 descends. Under the action of the pressure rods 6, the right-angle frames 5 rotate backward, driving the lower die 4 to slide backward against the elastic force of the tension spring 7, so that the pressure head 3 corresponds to the position on the workpiece where a hole needs to be opened, thereby realizing the punching operation. Then the lifting plate 2 rises, and the pressure rod 6 rises accordingly. Under the action of the tension spring 7, the lower mold 4 moves forward to reset, making it convenient to change the workpiece.

[0024] like Figure 1 As shown, the right-angle frame 5 is provided with a first elongated hole 8, and the lower mold 4 is provided with a guide rod 9 on its side that cooperates with the first elongated hole 8. When the right-angle frame 5 rotates, the lower mold 4 moves back and forth continuously under the action of the first elongated hole 8 and the guide rod 9.

[0025] like Figure 1 As shown, the bottom of the front side of the first elongated hole 8 is provided with a groove 10. When the lifting plate 2 descends until the pressure head 3 contacts the workpiece, the lifting plate 2 continues to descend a short distance, and the pressure head 3 punches a hole in the workpiece. At this time, the guide rod 9 enters the groove to ensure that the lower die 4 will not move during the punching process.

[0026] like Figure 2 As shown, the rear end of the right-angle frame 5 is provided with a roller 11 that cooperates with the pressure rod 6. When the pressure rod 6 descends, it contacts the roller 11, thereby driving the right-angle frame 5 to rotate.

[0027] like Figure 1As shown, the base 1 has a column 12 that passes through and is slidably connected to the lifting plate 2. The base 1 also has a vertical plate 13, and the vertical plate 13 has a swing arm 14 whose rear end is rotatably connected to the vertical plate 13. The middle position of the swing arm 14 is connected to the upper end of the pressure head 3 via a connecting rod 15. The upper end of the connecting rod 15 is rotatably connected to the swing arm 14, and the lower end of the connecting rod 15 is rotatably connected to the upper end of the pressure head 3. When the swing arm 14 swings up and down, the pressure head 3 continuously rises and falls under the action of the connecting rod 15.

[0028] like Figure 3 As shown, the lower die 4 is equipped with a positioning mechanism for positioning the workpiece. The positioning mechanism includes a positioning block 16 mounted on the lower die 4 and right-angle plates 17 respectively disposed on the rear and right sides of the positioning block 16. The lower end of the right-angle plate 17 extends into the positioning block 16 and slides within it. During operation, the workpiece is placed on the positioning block 16, and the position of the right-angle plate 17 can be adjusted according to the size of the workpiece, accommodating workpieces of different sizes and enabling punching at different positions on the workpiece.

[0029] like Figure 4 As shown, the bottom of the right-angle plate 17 is provided with a second elongated hole 18. The bottom of the right-angle plate 17 is positioned with the positioning block 16 by screws. By loosening the screws, the right-angle plate 17 can be moved along the second elongated hole, which is convenient for adjustment.

[0030] In the description of this utility model, it should be noted that the terms "left", "right", "up", "down", 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 this 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 this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A small punch press, comprising a base (1), a lifting plate (2) disposed on the base (1) and moving up and down on the base (1), a press head (3) disposed on the lifting plate (2), and a lower die (4), characterized in that, The lower mold (4) is slidably connected to the base (1). The base (1) is provided with right-angle brackets (5) at the corner positions on both sides of the lower mold (4) and rotatably connected to the base (1). The front end of the right-angle bracket (5) is movably connected to the side of the lower mold (4). The lifting plate (2) is symmetrically provided with pressure rods (6). The pressure rods (6) are engaged with the rear end of the right-angle brackets (5). The lower mold (4) is connected to the front end of the base (1) by a tension spring (7).

2. A small punch press as described in claim 1, characterized in that, The right-angle frame (5) is provided with a first elongated hole (8), and the lower mold (4) is provided with a guide rod (9) on its side that cooperates with the first elongated hole (8).

3. A small punch press as described in claim 2, characterized in that, The first elongated hole (8) has a groove (10) at the bottom of its front side.

4. A small punch press as described in claim 1, characterized in that, The rear end of the right-angle frame (5) is provided with a roller (11) that cooperates with the pressure rod (6).

5. A small punch press as described in claim 1, characterized in that, The base (1) is provided with a column (12) that passes through the lifting plate (2) and is slidably connected to the lifting plate (2). The base (1) is provided with a plate (13). The plate (13) is provided with a swing arm (14) whose rear end is rotatably connected to the plate (13). The middle position of the swing arm (14) is connected to the upper end of the pressure head (3) through a connecting rod (15).

6. A small punch press as described in claim 1, characterized in that, The lower mold (4) is provided with a positioning mechanism for positioning the workpiece.

7. A small punch press as described in claim 6, characterized in that, The positioning mechanism includes a positioning block (16) installed on the lower mold (4) and right-angle plates (17) respectively set on the rear side and the right side of the positioning block (16). The lower end of the right-angle plate (17) extends into the positioning block (16) and slides within the positioning block (16).

8. A small punch press as described in claim 7, characterized in that, The bottom of the right-angle plate (17) is provided with a second elongated hole (18).

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