Punching and shearing equipment for transformer angle ring

Abstract

The utility model discloses punching and shearing equipment for a transformer angle ring, and relates to punching and shearing equipment used when the transformer angle ring is machined. The device is mainly designed for solving the problem of low efficiency of processing the angle ring of the transformer at present. The top of the base is provided with a working table and a supporting frame, the supporting frame is provided with a punching and shearing die and a hydraulic cylinder, the lower half portion of an opening in the middle of a fixed cutter of the punching and shearing die is in a V shape, cutting edges of the fixed cutter are arranged on the two edges of the lower half portion of the opening, and V-shaped cutting edges of a movable cutter are located above the sides of the cutting edges of the fixed cutter which is connected with the hydraulic cylinder. A connecting column is arranged in the sleeve at the upper end of the pressing block, and a nut is screwed on the connecting column after the connecting column extends out of the fixed cutter; and a tension spring is arranged between the connecting column and the pressing block. The upper end of the sleeve is connected with a connecting plate, a pressing block in a first groove in the connecting plate is connected to the movable cutter, and a second groove is formed in the fixed cutter. And a pressure spring is arranged outside the sleeve. And the cylinder of the pressing block extends into the long hole of the movable cutter. The fixed cutter is connected to the supporting frame through a bolt. The working efficiency is high.

Description

Technical fields:

[0001] This utility model relates to a punching and shearing device used in processing transformer corner rings. Background technology:

[0002] Currently, when processing transformer corner rings, the arc length of the corner ring is cut with a band saw, which easily generates dust and affects the health of workers. In addition, each corner ring needs to be cut according to the drawn dimension lines, and the burrs on the edges need to be polished with a small belt sander, which is time-consuming and inefficient. Summary of the Invention:

[0003] The technical problem to be solved by this utility model is to provide a punching and shearing device for transformer corner rings, which can punch and shear corner rings without grinding the cut, thus improving work efficiency.

[0004] The purpose of this utility model is achieved as follows: it includes a base, and a worktable is fixed on the top of the base;

[0005] The workbench is equipped with several rows of corner ring positioning slots. Each row of corner ring positioning slots includes several corner ring positioning slots and several positioning blocks that can be inserted into the corner ring positioning slots. After the arc-shaped corner ring to be processed is placed on the workbench, positioning blocks are inserted into the corner ring positioning slots on both sides of the corner ring to achieve positioning of the corner ring.

[0006] A support frame is fixed on the base on one side of the workbench. Two punching and shearing dies with the same structure are installed on the support frame. The two punching and shearing dies are set in a mirror image. Two hydraulic cylinders are also installed on the top of the support frame. The two hydraulic cylinders are connected to the two punching and shearing dies respectively.

[0007] The punching and shearing die includes a moving blade and a fixed blade;

[0008] The fixed blade has a V-shaped lower half and a rectangular upper half. The fixed blade has an opening in the middle, and the lower half of the opening is V-shaped. The approximately V-shaped blade edge is set on the two sides of the V-shaped lower half of the opening, and the included angle between the two sides of the blade edge is 90°. The fixed blade ends on both sides of the opening have grooves, and the fixed blade at the top of the opening has two round holes.

[0009] The lower end of the moving blade has an approximately V-shaped cutting edge. The moving blade and the fixed blade are positioned opposite each other, with the moving blade's cutting edge located above and to the side of the fixed blade's cutting edge. When the moving blade moves toward the fixed blade, the sides of the moving blade's cutting edge and the fixed blade's cutting edge come into contact, allowing for shearing of the workpiece. The included angle between the two sides of the moving blade's cutting edge is 86°. During operation, the workpiece is positioned between the moving blade and the fixed blade. Thus, as the moving blade moves, the included angle of the moving blade's cutting edge contacts the workpiece first, and then the two sides of the cutting edge gradually come into contact with the workpiece, achieving the shearing effect.

[0010] The top of the moving cutter is connected to the lever of the hydraulic cylinder. The two ends of the moving cutter are located in the grooves on both sides of the fixed cutter and slide in contact with the grooves. The operation of the hydraulic cylinder can drive the moving cutter to move closer to or away from the fixed cutter.

[0011] It also includes a clamping device for clamping the workpiece corner ring. The clamping device is located on the side of the moving blade. The clamping device includes a clamping block that is approximately inverted trapezoidal in shape. The two inclined sides of the clamping block face the cutting edge of the fixed blade. Two sleeves are fixed to the upper end of the clamping block. Connecting columns are slidably provided in the two sleeves. The upper part of the connecting columns is threaded. The upper ends of the two connecting columns extend from the two round holes of the fixed blade, and nuts are screwed onto the extended parts. A tension spring is connected between the lower end of the connecting column and the upper end of the clamping block.

[0012] Two sleeves are connected to a connecting plate at their upper ends. The connecting plate has two circular holes, which fit onto the two sleeves. Between the two holes, the connecting plate has a first groove with an upward-facing opening. A pressure block is located within this first groove and is bolted to the moving cutter. A corresponding second groove with a downward-facing opening is located on the fixed cutter above the first groove. The first and second grooves are the same width. The pressure block slides in contact with the sidewall of the first groove. When the lever of the hydraulic cylinder retracts, causing the moving cutter to move, the pressure block on the moving cutter can enter the second groove. When the lever of the hydraulic cylinder extends, causing the moving cutter to move, the pressure block contacts the bottom of the first groove, causing the connecting plate to continue moving downwards, thus pressing the workpiece down with a clamping block. A clamping spring is fitted onto each of the two sleeves between the connecting plate and the clamping block. A cylinder extending towards the moving cutter is fixed to the side of the clamping block facing the moving cutter. The moving cutter has a vertical elongated hole corresponding to the cylinder, into which the cylinder of the clamping block extends.

[0013] The two inclined sides of the clamping block facing the fixed blade protrude from the corresponding cutting edge of the moving blade. That is, when the device is stationary, the two inclined sides of the clamping block are located outside the cutting edge of the moving blade.

[0014] After the lower half of the fixed tool is rotated to a horizontal position, one of its inclined sides is connected to the support frame by bolts.

[0015] The advantages of this invention are: the device does not easily generate dust during operation, and the positioning blocks and positioning grooves can be used to limit the diagonal rings, resulting in fast positioning speed; the edges after punching and shearing are smooth and burr-free, eliminating the need for grinding and improving work efficiency.

[0016] This device is equipped with two mirror-mounted punching and shearing dies, which can realize the shearing of both ends of the positive and negative angle rings. Attached image description:

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

[0018] Figure 2This is a side view structural diagram of the present invention;

[0019] Figure 3 This is a top view of the structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the punching and shearing die in this utility model;

[0021] Figure 5 This is a schematic diagram of the moving blade in this utility model;

[0022] Figure 6 This is a schematic diagram of the fixed blade in this utility model. Detailed implementation method:

[0023] The following is combined with Figure 1-6 The present invention will be further described below;

[0024] It includes a base 1 and a worktable 2 fixed on top of the base;

[0025] The workbench is provided with several rows of corner ring positioning slots 21. Each row of corner ring positioning slots includes several corner ring positioning slots and several positioning blocks 22 that can be inserted into the corner ring positioning slots. After the arc-shaped corner ring 7 to be processed is placed on the workbench, positioning blocks are inserted into the corner ring positioning slots on both sides of the corner ring to achieve positioning of the corner ring.

[0026] A support frame 3 is fixed on the base on one side of the workbench. Two punching and shearing dies 4 with the same structure are installed on the support frame. The two punching and shearing dies are set in a mirror image. Two hydraulic cylinders 5 are also installed on the top of the support frame. The two hydraulic cylinders are connected to the two punching and shearing dies respectively.

[0027] The punching and shearing die 4 includes a moving blade 41 and a fixed blade 42;

[0028] The fixed blade 42 has a V-shaped lower half and a rectangular upper half. The fixed blade has an opening 44 in the middle, and the lower half of the opening is V-shaped. The approximately V-shaped blade edge 43 is set on the two sides of the V-shaped lower half of the opening, and the included angle between the two sides of the blade edge is 90°. The fixed blade ends on both sides of the opening are provided with grooves 45, and the fixed blade at the top of the opening is provided with two round holes 46.

[0029] The lower end of the moving blade 41 is provided with an approximately V-shaped moving blade edge 47. The moving blade and the fixed blade are positioned opposite each other, with the moving blade edge located above and to the side of the fixed blade edge. When the moving blade moves toward the fixed blade, the sides of the moving blade edge and the fixed blade edge come into contact, which can shear the workpiece. The included angle between the two sides of the moving blade edge is 86°. During operation, the workpiece is located between the moving blade and the fixed blade. Thus, when the moving blade moves, the included angle of the moving blade edge first contacts the workpiece, and then the two sides of the blade edge gradually contact the workpiece, achieving the shearing effect.

[0030] The top of the moving cutter is connected to the lever of the hydraulic cylinder 5. The two ends of the moving cutter are located in the sliding grooves on both sides of the fixed cutter and slide in contact with the sliding grooves. The operation of the hydraulic cylinder can drive the moving cutter to move closer to or away from the fixed cutter.

[0031] It also includes a clamping device 6 for clamping the workpiece corner ring. The clamping device is located on the side of the moving blade. The clamping device includes a clamping block 61 that is approximately inverted trapezoidal. The two inclined sides of the clamping block face the cutting edge of the fixed blade. Two sleeves 62 are fixed to the upper end of the clamping block. Connecting posts 63 are slidably provided in the two sleeves. The upper part of the connecting posts is threaded. The upper ends of the two connecting posts extend from the two round holes 46 of the fixed blade, and nuts are screwed onto the extended parts. A tension spring 64 is connected between the lower end of the connecting posts and the upper end of the clamping block.

[0032] A connecting plate 65 is connected to the upper end of the two sleeves. The connecting plate has two round holes, which fit onto the two sleeves 62 respectively. A first groove 66 with an upward opening is provided on the connecting plate between the two round holes. A pressure block 49 is located in the first groove and is bolted to the moving cutter. A corresponding second groove 410 with a downward opening is provided on the fixed cutter above the first groove 66. The first and second grooves have the same width. The pressure block slides in contact with the side wall of the first groove. When the lever of the hydraulic cylinder retracts, causing the moving cutter to move, the pressure block on the moving cutter can enter the second groove. When the lever of the hydraulic cylinder extends, causing the moving cutter to move, the pressure block contacts the bottom of the first groove, causing the connecting plate to continue moving downwards, thereby pressing the workpiece with the clamping block. A clamping spring 67 is fitted on each of the two sleeves between the connecting plate and the clamping block. A cylinder 68 extending toward the moving knife is fixed on the side of the clamping block facing the moving knife. The moving knife has a vertical elongated hole 48 at the corresponding part of the cylinder, and the cylinder of the clamping block extends into the elongated hole of the moving knife.

[0033] The two inclined sides of the clamping block facing the fixed blade protrude from the corresponding cutting edge of the moving blade. That is, when the device is stationary, the two inclined sides of the clamping block are located outside the cutting edge of the moving blade.

[0034] After the lower half of the fixed tool is rotated to a horizontal position, one of its inclined sides is connected to the support frame by bolts.

[0035] Working process: After placing the arc-shaped corner ring to be processed on the worktable, positioning blocks are inserted into the corner ring positioning grooves on both sides of the corner ring to position it. Then, the end of the corner ring is fed between the moving and fixed cutting edges. The hydraulic cylinder drives the moving blade to move towards the fixed blade. At the same time, the moving blade moves the connecting plate, sleeve, and clamping block through the pressure block, so that the clamping block first contacts the workpiece to clamp it, and then the moving blade edge contacts the workpiece to shear it. After shearing, the lever of the hydraulic cylinder retracts, causing the moving blade to return. At this time, under the action of the tension spring, the clamping block moves away from the workpiece.

[0036] This device is suitable for workpieces with a width of 250mm or less and a thickness of 4mm or less.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A punching and shearing device for transformer corner rings, comprising a base (1) and a worktable (2) fixed on the top of the base; characterized in that: A support frame (3) is fixed on the base on one side of the workbench. Two punching and shearing dies (4) with the same structure are installed on the support frame. The two punching and shearing dies are set in a mirror image. Two hydraulic cylinders (5) are also installed on the top of the support frame. The two hydraulic cylinders are connected to the two punching and shearing dies respectively. The punching and shearing die (4) includes a moving blade (41) and a fixed blade (42); The fixed blade (42) has a V-shaped lower half and a rectangular upper half. The fixed blade has an opening (44) in the middle. The lower half of the opening is V-shaped. The fixed blade cutting edge (43) with an approximate V-shape is set on the two sides of the V-shaped lower half of the opening. The fixed blade ends on both sides of the opening are provided with grooves (45). The fixed blade at the top of the opening is provided with two round holes (46). The lower end of the moving knife (41) is provided with an approximately V-shaped moving knife cutting edge (47). The moving knife and the fixed knife are positioned opposite each other. The moving knife cutting edge is located above the side of the fixed knife cutting edge. The top of the moving knife is connected to the lever of the hydraulic cylinder (5). The two ends of the moving knife are located in the sliding grooves on both sides of the fixed knife and slide in contact with the sliding grooves. It also includes a clamping device (6) for clamping the workpiece corner ring. The clamping device is located on the side of the moving knife. The clamping device includes a clamping block (61) that is approximately inverted trapezoidal. The two inclined sides of the clamping block face the cutting edge of the fixed knife respectively. Two sleeves (62) are fixed at the upper end of the clamping block. A connecting column (63) is slidably provided in both sleeves. The upper part of the connecting column is threaded. The upper ends of the two connecting columns extend from the two round holes (46) of the fixed knife respectively. Nuts are screwed on the extended parts. A tension spring (64) is connected between the lower end of the connecting column and the upper end of the clamping block. The upper ends of the two sleeves are connected to a connecting plate (65), that is, the connecting plate is provided with two round holes, and the round holes of the connecting plate are respectively fitted onto the two sleeves (62); the connecting plate between the two round holes is provided with a first groove (66) with the opening facing upward, and a pressure block (49) is provided in the first groove. The pressure block is connected to the moving knife by bolts. The fixed knife above the first groove (66) is provided with a second groove (410) with the opening facing downward. The width of the first groove and the second groove are the same. The pressure block slides in contact with the side wall of the first groove. A clamping spring (67) is fitted on both sleeves between the connecting plate and the clamping block; a cylinder (68) extending towards the moving knife is fixed on the side of the clamping block facing the moving knife. The moving knife is provided with a vertical long hole (48) at the corresponding part of the cylinder. The cylinder of the clamping block extends into the long hole of the moving knife. After the lower half of the fixed tool is rotated to a horizontal position, one of its inclined sides is connected to the support frame by bolts.

2. The punching and shearing equipment for transformer angle rings according to claim 1, characterized in that: The included angle between the two sides of the fixed cutting edge is 90°; the included angle between the two sides of the moving cutting edge is 86°.

3. The punching and shearing equipment for transformer angle rings according to claim 1 or 2, characterized in that: The workbench is provided with several rows of corner ring positioning slots (21). Each row of corner ring positioning slots includes several corner ring positioning slots and several positioning blocks (22) that can be inserted into the corner ring positioning slots.

4. The punching and shearing equipment for transformer angle rings according to claim 1 or 2, characterized in that: The two inclined sides of the clamping block facing the fixed blade protrude from the corresponding cutting edge of the moving blade. That is, when the device is stationary, the two inclined sides of the clamping block are located outside the cutting edge of the moving blade.

Images