Squeezing residue-pressing shear
By using a split-design extrusion shear with cemented carbide material and an oblique structure for connection, the problem of easy damage to the shear blade is solved, resulting in better shearing effect and reduced maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-23
- Publication Date
- 2026-03-24
Smart Images
Figure CN224026582U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of extrusion, specifically to an extrusion residual shear. Background Technology
[0002] During the extrusion process, after each short ingot is extruded, a certain thickness of tail material remains behind the extrusion die. The conventional method is to shear this off with a sharp metal blade. However, if the shearing is poor (e.g., a wide blade results in a poor shearing effect; a narrower blade is easier to cut cleanly, but the blade is more prone to damage and has higher maintenance costs), aluminum from the die cavity will be carried out, leading to surface scratches and bubbles in the profile during subsequent extrusion. Therefore, an improved design is needed that allows for a thinner yet more effective shear blade while reducing overall costs. Utility Model Content
[0003] To address the aforementioned problems, the purpose of this utility model is to provide a compression shear.
[0004] According to this utility model, a compression shear is provided, comprising: a power rod, a compression shear body, and a compression shear blade body formed separately. The compression shear blade body is fixedly installed below the power rod via the compression shear body. A gap is formed between a left support and a right support extending downward on the lower side of the power rod. A protrusion extending upward on the upper side of the compression shear body is inserted into the gap for fixed connection. In an inclined structure extending downward on the lower side of the compression shear body, the inclination angle between one side and the extension direction of the compression shear body is smaller than the inclination angle between the other side and the extension direction of the compression shear body. A first joint for installing the compression shear blade body and a fixing through hole for fixing the compression shear blade body are respectively opened at the lower end of the inclined structure. A second joint corresponding to the first joint and a threaded countersunk hole corresponding to the fixing through hole are formed on the compression shear blade body.
[0005] Preferably, the left and right pillars have through holes aligned with each other, and the protrusion has a corresponding through hole, so that the protrusion can be fixedly connected by the first bolt and nut.
[0006] Preferably, the first joint is configured as an irregular groove at the bottom of the inclined structure. In the cross-sectional view of the irregular groove, the left side is the inner left inclined surface, the top is the bottom plane of the groove, and the right side is the right plane of the groove. The second joint is configured as an irregular protrusion located in the upper right part of the main body of the pressure shear blade. In the cross-sectional view of the irregular protrusion, the three upper sides are: the left side is the left inclined surface, the top is the upper plane, and the right side is the right plane.
[0007] Preferably, the threaded through hole and threaded countersunk hole extending vertically downward relative to the axis, as well as the right plane and right plane of the groove extending vertically downward, form an inclined plane with the left bevel and the inner left bevel.
[0008] Preferably, the plane of the countersunk hole is set lower than the upper plane, so that the two are separated by a left inclined plane to form a step.
[0009] Preferably, the bottommost part of the residual shear blade body is the residual shear blade tip.
[0010] Preferably, two sets of through-holes are provided in the left and right pillars and the protruding block, spaced apart in the vertical direction.
[0011] Preferably, the thickness of the residual shear blade tip is 0.2±0.01mm.
[0012] The beneficial effects of this utility model are: the main body of the residual shear blade is separated from the residual shear structure, making it easier to replace the main body of the residual shear blade. Higher strength cemented carbide can be used alone, and the shear blade can be thinner. The thickness of the residual shear blade tip is 0.2 (±0.01) mm, compared with the general normal shear blade which only uses a maximum of 0.5 (±0.01) mm to extend its service life. The shearing effect is better, and the overall cost is lower. Attached Figure Description
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.
[0014] Figure 1 This is a schematic front cross-sectional view of a compression shear.
[0015] Figure 2 This is a magnified schematic diagram of a compression shear.
[0016] Figure 3 This is a magnified disassembly diagram of a compression shear. Detailed Implementation
[0017] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present invention, enabling those skilled in the art to implement and use the present invention in several different environments and for several different applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, a limiting description of the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the drawings are not necessarily drawn to actual scale. Orientation descriptions, such as up, down, left, right, top, bottom, etc., indicating orientation or positional relationships, such as the shearing direction corresponding to the vertical downward shearing of the compression shear, are all based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or partial constructions will be omitted where they may cause confusion or make the understanding of the present disclosure difficult to observe. Unless otherwise specifically stated, the order and numerical values of the components and assembly steps described in the embodiments do not limit the scope of this invention.
[0018] This utility model provides a compression shear, comprising: a power rod 101, a compression shear body 102, a compression shear blade body 103, a compression shear blade tip 104, a connecting bolt 105, a protrusion 106, a clear hole I 107, a clear hole II 108, a left support 109, a right support 110, a clear hole III 111, a clear hole IV 112, a bolt I 113, a nut I 114, a bolt II 115, a nut II 116, a countersunk groove 117, a threaded through hole 118, a threaded countersunk hole 119, a shaped groove 120, a shaped protrusion 121, an upper plane 122, a left inclined plane 123, a right plane 124, an inner left inclined plane 125, a groove bottom plane 126, a groove right plane 127, and an inclined structure 128.
[0019] The power rod 101 is connected to the left support 109 and the right support 110 below. The left support 109 and the right support 110 are parallel and both extend vertically downward from the power rod 101.
[0020] The left support 109 and the right support 110 each have two horizontally aligned through-holes at the top and bottom, respectively. The two through-holes are perpendicular to the left support 109 and the right support 110. The through-hole at the top is called through-hole Ⅲ111, and the through-hole at the bottom is called through-hole Ⅳ112.
[0021] The protruding block 106 extends vertically upward on the main body 102 of the residual shear.
[0022] Two through-holes are drilled on the top and bottom of the protrusion 106, and the two through-holes are perpendicular to the protrusion 106.
[0023] When the protrusion 106 on the main body 102 of the pressure shear is inserted into the gap between the left support 109 and the right support 110, the light hole on the protrusion 106 and the light hole on the left support 109 and the right support 110 are aligned on the same horizontal line.
[0024] Bolt I113 can be inserted into aperture III111 and aperture I107 first, and then nut I114 can be tightened to fix it.
[0025] Bolt II115 can be inserted into aperture II108 and aperture IV112 first, and then nut II116 can be tightened to fix it.
[0026] Below the main body 102 of the residual shear is an oblique structure 128. The left side of the oblique structure 128 is inclined at a small angle to the extension direction of the main body 102 of the residual shear, and the right side of the oblique structure 128 is inclined at a large angle to the main body 102 of the residual shear.
[0027] The lower left side of the slanted structure 128 has a countersunk groove 117, and the bottom of the countersunk groove 117 has a vertical through threaded hole 118.
[0028] The bottom of the slanted structure 128 has an irregular groove 120. The left side of the irregular groove 120 is the inner left slanted surface 125, the top is the bottom plane of the groove 126, and the right side is the right plane of the groove 127.
[0029] Below the italic structure 128 is an independent shear blade body 103.
[0030] The upper right part of the main body 103 of the pressure shear blade is an irregular protrusion 121. The three sides of the irregular protrusion 121 are: the left side is the left inclined surface 123, the top side is the upper plane 122, and the right side is the right plane 124.
[0031] The upper left part of the main body 103 of the shear blade has a vertical threaded countersunk hole 119.
[0032] The bottom of the main body 103 of the residual shear blade is the tip 104 of the residual shear blade.
[0033] The irregular protrusion 121 of the main body 103 of the shear blade can be inserted into the irregular groove 120 at the bottom of the inclined structure 128.
[0034] At this moment, the countersunk hole 119 of the main body 103 of the pressure shear blade and the threaded through hole 118 of the inclined structure 128 are aligned on the same horizontal line.
[0035] The connecting bolt 105 passes through the countersunk groove 117 and is screwed into the threaded through hole 118 and the threaded countersunk hole 119 to fix the main body 103 of the pressure shear blade and the inclined structure 128 together.
[0036] The plane with the countersunk hole 119 is lower than the upper plane 122, forming a step between them. This allows for the smooth installation of the shear blade body 103 by utilizing the inclined planes of the left bevel 123 and the inner left bevel 125. Furthermore, the connection between the threaded through hole 118 extending vertically downwards and the countersunk hole 119, as well as the mating between the right groove plane 127 extending vertically downwards and the right plane 124, overcomes the torque generated during machining, ensuring reliable fixation.
[0037] The assembled residual shear structure 100 is basically the same in appearance as the normal residual shear structure 100. During operation, the power rod 101 is hydraulically driven, which sequentially drives the residual shear body 102, the residual shear blade body 103, and the residual shear blade tip 104 downwards. When they pass the residual 300 on the end face of the extrusion die 200, they cut off the residual 300.
[0038] The above shows the joining recess on one side of the inclined structure 128 and the joining protrusion on the side of the shear blade body 103. Conversely, they can also be joined, so they can all be referred to as joining portions.
[0039] <Example: Dimensions and Material Specifications>
[0040] Left support column 109 dimensions: thickness 20 (±0.1) mm, height 400 (±0.1) mm, width 200 (±0.1) mm.
[0041] Right support column 110 dimensions: thickness 60 (±0.1) mm, height 400 (±0.1) mm, width 200 (±0.1) mm.
[0042] The apertures Ⅲ111 and Ⅳ112 have the same size, with a diameter of 21 (±0.1) mm.
[0043] Bolt I113 and bolt II115 have the same dimensions: diameter 20 (±0.01) mm and screw length 220 (±0.1) mm.
[0044] Dimensions of protrusion 106: Thickness 80 (0, -0.2) mm, Height 400 (0, -0.2) mm, Width 200 (±0.1) mm.
[0045] The aperture I 107 and aperture II 108 have the same size, with a diameter of 21 (±0.1) mm.
[0046] The dimensions of the main body 102 of the residual shear are: thickness 100 (±0.1) mm, height 100 (±0.1) mm, and width 200 (±0.1) mm.
[0047] The angle between the left side of the inclined structure 128 and the extension direction of the residual shear body 102 is 15 (±0.1)°, and the angle between the right side of the inclined structure 128 and the extension direction of the residual shear body 102 is 60 (±0.1)°.
[0048] The diameter of the countersunk groove 117 is 30 (±0.1) mm.
[0049] The diameter of the threaded through hole 118 is 20 (±0.01) mm and the depth is 55 (±0.1) mm.
[0050] The diameter of the countersunk hole 119 is 20 (±0.01) mm and the depth is 40 (±0.1) mm.
[0051] The diameter of the connecting bolt 105 is 20 (±0.01) mm, and the length of the screw is 100 (±0.1) mm.
[0052] The internal dimensions of the irregular groove 120 and the upper dimensions of the irregular protrusion 121 are basically the same.
[0053] The angle between the inner left inclined surface 125 of the irregular groove 120 and the extension direction of the shear body 102 is 15 (±0.1)°, and the angle between the left inclined surface 123 of the irregular protrusion 121 and the extension direction of the shear body 102 is 15 (±0.1)°.
[0054] The slope dimensions of the inner left inclined surface 125 of the irregular groove 120 are: length 110 (±0.1) mm and width 200 (±0.1) mm; the slope length of the left inclined surface 123 of the irregular protrusion 121 is 110 (±0.1) mm and the width is 200 (±0.1) mm.
[0055] The dimensions of the bottom plane 126 of the irregular groove 120 are 95 (0, +0.2) mm in length and 200 (±0.1) mm in width; the upper plane 122 of the irregular protrusion 121 has a length of 95 (-0.2, 0) mm and a width of 200 (±0.1) mm.
[0056] The right plane 127 of the irregular groove 120 has a length of 30 (±0.1) mm and a width of 200 (±0.1) mm; the right plane 124 of the irregular protrusion 121 has a length of 30 (±0.1) mm and a width of 200 (±0.1) mm.
[0057] The thickness of the 104 blade tip is 0.2 (±0.01) mm, while normal blades are typically only used to extend their lifespan by a maximum of 0.5 (±0.01) mm.
[0058] The power rod 101 and the main body of the pressure shear 102 are both made of high-carbon manganese steel, grade 65Mn.
[0059] The main body of the residual shear blade, 103, is made of tungsten-cobalt cemented carbide steel, grade YG20C, which has ultra-high wear resistance, high temperature resistance and impact resistance.
[0060] All bolts and nuts are made of high-carbon manganese steel, grade 65Mn.
[0061] Advantages: The main body 103 of the residual shear blade is separated from the residual shear structure 100, making it easier to replace the main body 103 of the residual shear blade. Higher strength cemented carbide can be used alone, and the shear blade can be thinner. The tip 104 of the residual shear blade is 0.2 (±0.01) mm, while normal shear blades are usually only 0.5 (±0.01) mm to extend their lifespan. This results in better cutting performance and lower overall cost.
[0062] The above describes irregularly shaped protrusions 121 and irregularly shaped grooves 120 with corresponding and consistent shapes and sizes, used to fit the inclined structure 128 and the shear blade body 103 together, and to precisely position the shear blade body 103 in the desired machining position. Therefore, the two are also collectively referred to as the joining protrusion and the joining recess. In addition, the countersunk groove 117 and the threaded through hole 118 are collectively referred to as the fixed through hole.
[0063] In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. Unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Although the present invention has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described inventive concept. Therefore, it is intended that the present invention be limited to the described embodiments but will have the full scope defined by the language of the appended claims.
Claims
1. A compression shear, characterized in that, include: The power rod (101), the residual shear body (102), and the residual shear blade body (103) are formed separately. The residual shear blade body (103) is fixedly installed below the power rod (101) via the residual shear body (102). A gap is formed between the left support (109) and the right support (110) extending downward on the lower side of the power rod (101). A protrusion (106) extending upward on the upper side of the residual shear body (102) is inserted into the gap for fixed connection. The blade body extends obliquely downward on the lower side of the residual shear body (102). In the inclined structure (128), the inclination angle between one side and the extension direction of the residual shear body (102) is smaller than the inclination angle between the other side and the extension direction of the residual shear body (102). A first joint for mounting the residual shear blade body (103) and a fixing through hole for fixing the residual shear blade body (103) are respectively provided at the lower end of the inclined structure (128). A second joint corresponding to the first joint and a threaded countersunk hole (119) corresponding to the fixing through hole are formed on the residual shear blade body (103).
2. The extrusion shear according to claim 1, characterized in that, The left support (109) and the right support (110) have through holes aligned with each other, and the protrusion (106) has a corresponding through hole, so that the protrusion (106) can be fixedly connected by the first bolt and nut.
3. The extrusion shear according to claim 1, characterized in that, The first joint is formed as an irregular groove (120) at the bottom of the inclined structure (128). In the cross-sectional view of the irregular groove (120), the left side is the inner left inclined surface (125), the top side is the bottom plane of the groove (126), and the right side is the right plane of the groove (127). The second joint is formed as an irregular protrusion (121) located in the upper right part of the main body of the pressure shear blade (103). In the cross-sectional view of the irregular protrusion (121), the three sides on the top are: the left side is the left inclined surface (123), the top side is the upper plane (122), and the right side is the right plane (124).
4. The extrusion shear according to claim 3, characterized in that, The threaded through hole (118) and threaded countersunk hole (119) extending vertically downward relative to the axis, and the groove right plane (127) and right plane (124) extending vertically downward, the left inclined plane (123) and the inner left inclined plane (125) constitute an inclined plane.
5. The extrusion shear according to claim 3, characterized in that, The plane of the countersunk hole (119) is set lower than the upper plane (122), so that the two are separated by a left inclined plane (123) to form a step.
6. The extrusion shear according to claim 1, characterized in that, The bottom of the main body of the residual shear blade (103) is the tip of the residual shear blade (104).
7. The extrusion shear according to claim 1, characterized in that, Two sets of through-holes are provided in the left pillar (109), the right pillar (110), and the protrusion (106) in a vertically spaced manner.
8. The extrusion shear according to claim 1, characterized in that, The thickness of the residual shear tip (104) is 0.2±0.01mm.