Workpiece positioning device for punching machine

Abstract

The utility model discloses a work piece positioning device for a punching machine, which relates to the technical field of metal processing, and comprises a mechanical punching machine, the side surface of the mechanical punching machine is fixedly connected with a mounting table, the top of the mounting table is provided with a mounting support, and the mounting support is movably connected with an automatic material changing mechanism. A punch in transmission connection with a mechanical punch press is arranged above the automatic material changing mechanism, and pressure-bearing stand columns are arranged between the mounting support and the automatic material changing mechanism in a rectangular array mode. The automatic material changing mechanism comprises a sliding platform fixedly connected with the top of the pressure-bearing stand column, the sliding platform comprises a sliding transverse plate, and a positioning hole is formed in one end of the sliding transverse plate; according to the stamping die, the bottom die moves downwards through the dead weight and the weight of a workpiece, so that the bottom die moves into the positioning hole, and the chamfer arranged at the edge of the top of the positioning hole guides the workpiece into the positioning hole, so that the workpiece is positioned, and the workpiece is prevented from moving during stamping.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of metal processing, in particular to a workpiece positioning device for a punching machine. Background Art

[0002] Punching machines are mainly used for stamping metal sheets. Punching machines have a wide range of applications and can be used for punching, bending, stretching and forming. When in use, the material is placed at the bottom of the punch. The punch press applies pressure to the material to deform it and obtain the required shape and precision. Therefore, a set of molds (upper mold and lower mold) must be used to place the material between them and the machine applies pressure to deform it.

[0003] However, in practice, people have noticed that workers are required to place the workpiece on the workbench, and then the punch pushes the upper die to move, and the workpiece is processed through the cooperation of the upper and lower dies. The process of manually placing the workpiece and then stamping it takes a long time, resulting in low stamping efficiency, and automatic loading cannot guarantee the moving position of the workpiece. In addition, the workpiece will move to one side after being subjected to force during the stamping process, resulting in deviation in the stamping position and affecting the qualified rate. Utility Model Content

[0004] The purpose of the utility model is to provide a workpiece positioning device for a punch press, which drives the connecting rod to move the punch up and down while driving the sliding loader to slide on the sliding horizontal plate, cooperates with the workpiece storage box and the lifting die to complete the automatic replacement of the workpiece, improves the working efficiency of the punch press, and when the lifting die descends, it cooperates with the positioning hole to position the workpiece, prevents the workpiece from moving, and improves the accuracy of processing. To solve the technical problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A workpiece positioning device for a punch press comprises a mechanical punch press, a mounting platform is fixedly connected to the side of the mechanical punch press, a mounting support is arranged on the top of the mounting support, an automatic material changing mechanism is movably connected to the mounting support, a punch connected to the mechanical punch press is arranged above the automatic material changing mechanism, and pressure-bearing columns are arranged in a rectangular array between the mounting support and the automatic material changing mechanism;

[0007] The automatic material changing mechanism comprises a sliding platform fixedly connected to the top of the pressure-bearing column, the sliding platform comprises a sliding horizontal plate, one end of the sliding horizontal plate is provided with a positioning hole, and the inner side of the positioning hole is movably connected with a lifting die;

[0008] A workpiece storage box is fixedly connected to the top of one end of the sliding horizontal plate away from the lifting die, a sliding loader is arranged between the workpiece storage box and the sliding horizontal plate, and the sliding loader is slidably connected to the sliding horizontal plate.

[0009] As a further technical solution of the utility model, the bottom of the positioning holes is provided with support seats in a rectangular array, the support seats are fixedly connected to the sliding cross plate, and an arc-shaped groove is opened on the inner side of each support seat.

[0010] As a further technical solution of the utility model, the lifting die comprises a bottom die slidably connected to the inner side of the positioning hole, and the inner side of the bottom die is inserted into the arc-shaped groove, and the bottom of the bottom die is provided with a linkage shaft movably connected to the rectangular hole;

[0011] The sides of the two rectangular holes are integrally provided with shaft fixing plates corresponding to the linkage shaft, and both ends of the linkage shaft are penetrated through the shaft fixing plates and fixedly connected with end push rods.

[0012] As a further technical solution of the utility model, a middle push rod is fixedly connected to the middle position of the end push rod close to the bottom mold, the middle push rod is located below the bottom mold, and the end of the middle push rod is in contact with the bottom mold.

[0013] As a further technical solution of the utility model, the intermediate push rod and the end push rod are respectively arranged in an L shape, and rectangular holes corresponding to the end push rods are opened on both sides of the sliding cross plate, and the ends of the end push rods pass through the inner side of the rectangular holes.

[0014] As a further technical solution of the utility model, a punch is fixedly connected to the bottom of the punch, and both sides of the punch are integrally provided with extension shafts, both sides of the punch are provided with driving connecting rods, and the punch is transmission-connected to the sliding loader through the driving connecting rods.

[0015] v The sliding loader comprises a U-shaped moving frame, and both sides of the moving frame are integrally provided with fixed shaft rods, and the two ends of the driving connecting rod are movably connected to the fixed shaft rod and the extension shaft rod through bearings respectively.

[0016] As a further technical solution of the utility model, the end of the movable frame away from the lifting die is provided with a connecting rod and a rotating baffle, and one end of the connecting rod is movably connected to the movable frame through a pin shaft, and the other end of the connecting rod is movably connected to the rotating baffle.

[0017] As a further technical solution of the utility model, the workpiece storage box includes a box body fixedly connected to the top of the sliding horizontal plate, and the bottom of the box body is respectively fitted with the top of the movable frame and the rotating baffle, and a fixed ear plate is integrally provided on the side of the box body, and the end of the rotating baffle is movably connected to the fixed ear plate through a pin shaft.

[0018] As a further technical solution of the present utility model, a workpiece sliding cavity is provided inside the box body, and limiting horizontal plates are symmetrically arranged at the ends of the box body, and both of the two limiting horizontal plates are attached to both sides of the top of the moving frame.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] In the present utility model, when the punch drives the convex die to move upward, the sliding loader is driven to move to the left through the driving connecting rod, so that the workpiece in the sliding loader is moved to the lower part of the convex die, and when the workpiece inside the sliding loader moves, the processed workpiece can be pushed away from above the lifting concave die, thus completing automatic material replacement, saving the time consumption of manual workpiece placement, and improving the feeding speed and processing efficiency; in the present utility model, after the workpiece in the sliding loader moves to above the lifting concave die, the punch just drives the convex die to reach the topmost end, and then the convex die moves downward, pushing the sliding loader to move to the right through the driving connecting rod. After the sliding loader moves away from the top of the end push rod, the bottom die moves downward by its own weight and the weight of the workpiece, so that the bottom die moves into the positioning hole, and the chamfer provided at the top edge position of the positioning hole guides the workpiece into the positioning hole, thereby positioning the workpiece and preventing the workpiece from moving during stamping; in the present utility model, when the moving frame moves to the left, the rotating baffle is driven to rotate through the connecting rod, and the rotating baffle is rotated from the side of the box body to the lower part, blocking the workpiece stored inside the box body to prevent the workpiece from falling to the side of the moving frame, thus playing a limiting effect. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present utility model in the use state.

[0022] Figure 2 is in the present utility model Figure 1 partial enlarged schematic diagram.

[0023] Figure 3 is in the present utility model Figure 1 bottom structural schematic diagram.

[0024] Figure 4 is in the present utility model Figure 1 partial structural schematic diagram.

[0025] Figure 5 is in the present utility model Figure 4 another perspective view.

[0026] Figure 6 is in the present utility model Figure 4 partial structural schematic diagram.

[0027] Figure 7 is in the present utility model Figure 6 partial enlarged schematic diagram.

[0028] Figure 8 This utility model Figure 6 Schematic diagram of the bottom structure.

[0029] Figure 9 It is a three-dimensional structural schematic diagram of the workpiece storage box in the utility model.

[0030] Figure 10 It is a three-dimensional structural schematic diagram of the sliding platform in the utility model.

[0031] Figure 11 This utility model Figure 10 A partial enlarged schematic diagram of .

[0032] In the figure:

[0033] Mechanical punching machine -1, mounting table -2, punch -3, punch -4, mold protrusion -41, extension shaft -42, mounting support -5, sliding platform -6, sliding cross plate -61, slide groove -62, positioning hole -63, support seat -64, rectangular hole -65, arc groove -66, lifting die -7, bottom die -71, matching groove -72, linkage shaft -73, middle push rod -74, end push rod -75, driving connecting rod -8, connecting rod -81, end cover -82, adjustment groove -83, threaded column -84, sliding loader -9, moving frame -91, fixed shaft -92, limiting slider -93, connecting rod -94, rotating baffle -95, workpiece storage box -10, box body -101, workpiece sliding cavity -102, limiting cross plate -103, fixed ear plate -104, pressure-bearing column -11. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] See also Figure 1-11 The embodiment of the utility model provides a workpiece positioning device for a punching machine, comprising a mechanical punching machine 1, a mounting platform 2 is fixedly connected to the side of the mechanical punching machine 1, a mounting support 5 is provided on the top of the mounting platform 2, an automatic material changing mechanism is movably connected to the mounting support 5, a punch 3 which is transmission-connected to the mechanical punching machine 1 is provided above the automatic material changing mechanism, and a pressure-bearing column 11 is provided in a rectangular array between the mounting support 5 and the automatic material changing mechanism;

[0036] The automatic material changing mechanism includes a sliding platform 6 fixedly connected to the top of the pressure-bearing column 11. The sliding platform 6 includes a sliding cross plate 61. One end of the sliding cross plate 61 is provided with a positioning hole 63, and a lifting female die 7 is movably connected to the inner side of the positioning hole 63.

[0037] At the top of the end of the sliding cross plate 61 away from the lifting female die 7, a workpiece storage box 10 is fixedly connected. A sliding loader 9 is arranged between the workpiece storage box 10 and the sliding cross plate 61, and the sliding loader 9 is slidably connected to the sliding cross plate 61.

[0038] In this actual example, at the bottom of the positioning hole 63, support seats 64 are arranged in a rectangular array. The support seats 64 are fixedly connected to the sliding cross plate 61, and an arc-shaped groove 66 is formed inside each support seat 64.

[0039] By adopting the above technical solution, the sliding loader 9 slides on the sliding cross plate 61, moves the workpiece in the sliding cross plate 61 above the sliding cross plate 61, and then punches the workpiece through the mechanical punch 1 to realize automatic feeding of the workpiece.

[0040] In this actual example, the lifting female die 7 includes a bottom die 71 slidably connected to the inner side of the positioning hole 63. The inner side of the bottom die 71 is inserted into the arc-shaped groove 66. A linkage shaft rod 73 is arranged at the bottom of the bottom die 71 and is movably connected to a rectangular hole 65.

[0041] On the side surfaces of the two rectangular holes 65, a shaft rod fixing plate corresponding to the linkage shaft rod 73 is integrally arranged. Both ends of the linkage shaft rod 73 penetrate through the shaft rod fixing plate and are fixedly connected with end top rods 75.

[0042] In this actual example, in the middle position on the side of the end top rod 75 close to the bottom die 71, an intermediate top rod 74 is fixedly connected. The intermediate top rod 74 is located below the bottom die 71, and the end of the intermediate top rod 74 is in contact with the bottom die 71.

[0043] In this actual example, the intermediate top rod 74 and the end top rod 75 are respectively arranged in an L shape. Rectangular holes 65 corresponding to the end top rods 75 are formed on both sides of the sliding cross plate 61, and the ends of the end top rods 75 penetrate through the inner sides of the rectangular holes 65.

[0044] By adopting the above technical solution, the sliding loader 9 pushes the workpiece to move above the bottom mold 71. During the movement, the sliding loader 9 pushes the end push rod 75 to move downward. At this time, the end push rod 75 drives the linkage shaft 73 to rotate, and the middle push rod 74 on the other side of the linkage shaft 73 pushes the bottom mold 71 to move upward, so that the top of the bottom mold 71 is flush with the top of the sliding cross plate 61. When the sliding loader 9 continues to move, the workpiece inside the sliding loader 9 pushes the formed workpiece on the bottom mold 71 to the left until the workpiece inside the sliding loader 9 is located above the bottom mold 71.

[0045] When the sliding loader 9 moves away from the top of the end push rod 75, the bottom of the bottom mold 71 loses its upward thrust, and the bottom mold 71 slides downward on the inner side of the arc-shaped groove 66. At this time, the workpiece will fall into the positioning hole 63 to position the workpiece and prevent the workpiece from moving due to force during stamping.

[0046] In this example, the bottom of the punch 3 is fixedly connected to the punch 4, and both sides of the punch 4 are integrally provided with an extension shaft 42, both sides of the punch 4 are provided with a driving connecting rod 8, and the punch 4 is transmission-connected to the sliding loader 9 through the driving connecting rod 8.

[0047] In this example, the sliding loader 9 includes a U-shaped moving frame 91, and both sides of the moving frame 91 are integrally provided with a fixed shaft 92, and the two ends of the driving connecting rod 8 are movably connected to the fixed shaft 92 and the extension shaft 42 through bearings respectively.

[0048] In this example, the end of the movable frame 91 away from the lifting die 7 is provided with a connecting rod 94 and a rotating baffle 95, and one end of the connecting rod 94 is movably connected to the movable frame 91 through a pin shaft, and the other end of the connecting rod 94 is movably connected to the rotating baffle 95.

[0049] By adopting the above technical solution, when the punch 4 rises, the movable frame 91 is driven to slide on the sliding cross plate 61 by driving the two ends of the connecting rod 8 to be movably connected with the extension shaft 42 and the connecting rod 94, and the discharge and discharge work is completed in cooperation with the lifting of the lifting die 7, thereby realizing the automatic replacement of the processed workpiece. When the punch 4 descends, the movable frame 91 is pushed to move in the opposite direction by driving the connecting rod 8, and the lifting die 7 will sink when the movable frame 91 moves to position the workpiece, thereby providing a high degree of automation for the positioning device.

[0050] In this example, the workpiece storage box 10 includes a box body 101 fixedly connected to the top of the sliding cross plate 61, and the bottom of the box body 101 is respectively fitted with the top of the movable frame 91 and the rotating baffle 95, and a fixed ear plate 104 is integrally provided on the side of the box body 101, and the end of the rotating baffle 95 is movably connected to the fixed ear plate 104 through a pin shaft.

[0051] In this actual example, a workpiece sliding cavity 102 is provided inside the box body 101, and limiting cross plates 103 are symmetrically arranged at the ends of the box body 101. Both of the two limiting cross plates 103 are attached to both sides of the top of the moving frame 91.

[0052] By adopting the above technical solution, workpieces are stacked and placed in the workpiece sliding cavity 102 inside the box body 101. The workpieces move downward into the moving frame 91 due to their own weight. When the moving frame 91 moves, the connecting rod 94 on the side of the moving frame 91 drives the rotating baffle 95 to rotate to the bottom of the box body 101 to block the workpieces inside the box body 101 and prevent the workpieces from falling outside the moving frame 91, which affects the automatic material replacement of the moving frame 91.

[0053] In this actual example, limiting sliding blocks 93 are symmetrically arranged at the bottom of the moving frame 91. Sliding grooves 62 corresponding to the limiting sliding blocks 93 are formed on the limiting sliding blocks 93, and the limiting sliding blocks 93 are in sliding fit with the sliding grooves 62 to limit the moving direction of the moving frame 91, enabling the moving frame 91 to slide horizontally back and forth, and cooperating with the limiting cross plates 103 to prevent deviation during sliding.

[0054] In this actual example, the driving connecting rod 8 is composed of two connecting rods 81 that are intertwined with each other. End caps 82 are bolted to the ends of each of the connecting rods 81, and bearings are in interference fit between the connecting rods 81 and the end caps 82. The inner rings of the bearings are in interference fit with the fixed shaft rod 92 and the extended shaft rod 42 respectively.

[0055] In this actual example, adjusting grooves 83 are formed in each of the connecting rods 81. A threaded post 84 is integrally provided on the side of the connecting rod 81 away from the end cap 82. The end of any one of the threaded posts 84 penetrates through the adjusting groove 83 of the other connecting rod 81, and a locking nut is threadedly connected to the end of the threaded post 84.

[0056] In this actual example, fitting grooves 72 are formed in a circular array in the bottom die 71. The punch 4 is located above the bottom die 71, and a die protrusion 41 corresponding to the fitting grooves 72 is integrally provided at the bottom of the punch 4. After the punch 4 and the bottom die 71 are clamped, the die protrusion 41 is inserted into the fitting grooves 72 to punch the same holes on the surface of the workpiece through shear force.

[0057] The working principle of the present utility model is as follows: When in use, first stack the workpieces in the workpiece sliding cavity 102 inside the box body 101. The workpieces slide down into the moving frame 91. Inside the moving frame 91, only one workpiece can be accommodated. Then, the punch 3 drives the punch die 4 to move upward, drives the moving frame 91 to move to the left through the driving connecting rod 8. At the same time, the connecting rod 94 on the side of the moving frame 91 drives the rotating baffle 95 to rotate to the bottom of the box body 101 to block the workpieces inside the box body 101. As the moving frame 91 moves, the moving frame 91 pushes the end ejector rod 75 downward. The end ejector rod 75 drives the linkage shaft rod 73 to rotate, drives the middle ejector rod 74 on the other side of the linkage shaft rod 73 to move upward, so as to push the bottom die 71 upward and make the top of the bottom die 71 flush with the top of the sliding cross plate 61. During the movement of the moving frame 91, the workpiece inside the moving frame 91 will push the workpiece that has been stamped on the upper part of the bottom die 71 to move to the left until the workpiece inside the moving frame 91 completely moves above the bottom die 71, realizing the automatic replacement of the workpiece to be processed. Then, the punch 3 pushes the punch die 4 downward. The punch die 4 drives the moving frame 91 to move to the right through the driving connecting rod 8. When the moving frame 91 moves away from above the end ejector rod 75, the top of the end ejector rod 75 loses the block, and the bottom die 71 moves downward by its own weight, enabling the workpiece to enter the positioning hole 63 to automatically position the workpiece and prevent the workpiece from shifting after being stressed; the structure is simple, the operation is very convenient, and the labor intensity of workers is effectively reduced.

[0058] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0059] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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 workpiece positioning device for a punching machine, characterized in that: The invention comprises a mechanical punching machine (1), wherein a mounting platform (2) is fixedly connected to the side of the mechanical punching machine (1), a mounting support (5) is provided on the top of the mounting platform (2), an automatic material changing mechanism is movably connected to the mounting support (5), a punch (3) which is transmission-connected to the mechanical punching machine (1) is provided above the automatic material changing mechanism, and pressure-bearing columns (11) are provided in a rectangular array between the mounting support (5) and the automatic material changing mechanism; The automatic material changing mechanism comprises a sliding platform (6) fixedly connected to the top of the pressure-bearing column (11), the sliding platform (6) comprising a sliding horizontal plate (61), a positioning hole (63) being formed at one end of the sliding horizontal plate (61), and a lifting die (7) being movably connected to the inner side of the positioning hole (63); A workpiece storage box (10) is fixedly connected to the top of one end of the sliding transverse plate (61) away from the lifting die (7), a sliding loader (9) is provided between the workpiece storage box (10) and the sliding transverse plate (61), and the sliding loader (9) is slidably connected to the sliding transverse plate (61).

2. The workpiece positioning device for a punching machine according to claim 1, wherein: The bottom of the positioning holes (63) is provided with support seats (64) in a rectangular array. The support seats (64) are fixedly connected to the sliding horizontal plate (61), and an arc-shaped groove (66) is formed on the inner side of each support seat (64).

3. The workpiece positioning device for a punching machine according to claim 1, wherein: The lifting die (7) comprises a bottom die (71) slidably connected to the inner side of the positioning hole (63), and the inner side of the bottom die (71) is inserted into the arc-shaped groove (66). The bottom of the bottom die (71) is provided with a linkage shaft (73) movably connected to the rectangular hole (65); A shaft fixing plate corresponding to the linkage shaft (73) is integrally provided on the side surfaces of the two rectangular holes (65), and both ends of the linkage shaft (73) penetrate the shaft fixing plate and are fixedly connected to end push rods (75).

4. The workpiece positioning device for a punching machine according to claim 3, wherein: The middle position of the end push rod (75) close to the bottom mold (71) is fixedly connected to the middle push rod (74), the middle push rod (74) is located below the bottom mold (71), and the end of the middle push rod (74) is in contact with the bottom mold (71).

5. The workpiece positioning device for a punching machine according to claim 4, characterized in that: The intermediate push rod (74) and the end push rod (75) are respectively arranged in an L-shape, and rectangular holes (65) corresponding to the end push rods (75) are opened on both sides of the sliding cross plate (61), and the ends of the end push rods (75) pass through the inner sides of the rectangular holes (65).

6. The workpiece positioning device for a punching machine according to claim 1, characterized in that: The bottom of the punch (3) is fixedly connected to a punch (4), and both sides of the punch (4) are integrally provided with extension shafts (42), both sides of the punch (4) are provided with drive connecting rods (8), and the punch (4) is transmission-connected to a sliding feeder (9) via the drive connecting rods (8).

7. The workpiece positioning device for a punching machine according to claim 1, wherein: The sliding loader (9) comprises a U-shaped moving frame (91), and both sides of the moving frame (91) are integrally provided with fixed shafts (92), and both ends of the driving connecting rod (8) are movably connected to the fixed shaft (92) and the extension shaft (42) through bearings.

8. The workpiece positioning device for a punching machine according to claim 7, characterized in that: One end of the described moving frame (91) away from the lifting female die (7) is provided with a connecting rod (94) and a rotating baffle (95), and one end of the connecting rod (94) is movably connected to the moving frame (91) through a pin shaft, and the other end of the connecting rod (94) is movably connected to the rotating baffle (95).

9. The workpiece positioning device for a punching machine according to claim 1, characterized in that: The described workpiece storage box (10) includes a box body (101) fixedly connected above the sliding cross plate (61), and the bottom of the box body (101) is respectively in contact with the tops of the moving frame (91) and the rotating baffle (95). A fixed ear plate (104) is integrally provided on the side of the box body (101), and the end of the rotating baffle (95) is movably connected to the fixed ear plate (104) through a pin shaft.

10. The workpiece positioning device for a punching machine according to claim 9, characterized in that: A workpiece sliding cavity (102) is provided inside the described box body (101), and limiting cross plates (103) are symmetrically arranged at the ends of the box body (101), and both of the two limiting cross plates (103) are in contact with both sides of the top of the moving frame (91).

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