Improved cold shear blade

Abstract

The utility model relates to the field of steel production, in particular to an improved cold shear blade, which comprises an upper shear blade, a lower shear blade and a plurality of lower shear blades. A plurality of shearing grooves B are formed in the shearing side of the lower shearing blade in the length direction, chamfers are arranged on the outer edges of the shearing grooves B, and the shearing grooves B and the shearing grooves A are the same in number and matched in position; wherein the height from the notch of the shearing groove B to the upper surface of the lower shearing blade is the same as the height of the chamfer, and the shearing groove A and the shearing groove B are semicircular grooves with the radius being R respectively. The moving depth of the shearing groove B in the lower shearing blade towards the interior of the lower shearing blade is consistent with the height of the chamfer, so that during shearing, the chamfer can enable a bar to enter the shearing groove B more easily, and when the shearing groove A is matched with the shearing groove B, a circle which is the same as the section of the bar can be just formed for shearing. And deformation of the end face of the sheared bar is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel production, concretely relates to an improved cold shears blade. BACKGROUND

[0002] When producing bars, the steel plant usually needs to cut off by cold shears, generally, the blade of the shearing machine is upper cutting type, namely, the lower blade is fixed, and the upper blade moves up and down by the action of the hydraulic machine, so as to cooperate with the lower blade to realize the shearing function of the steel, for the shearing of the bar, since the bar is circular, it is easy to roll after extrusion during shearing, so it is usually necessary to set an arc groove with the size matching the diameter of the bar on the blade to limit each steel for shearing, but since the bar usually falls into the shearing groove of the lower blade from top to bottom, in order to make the bar more easily enter the shearing groove of the lower blade, it is usually necessary to set a certain chamfer on the edge of the shearing groove of the lower blade to guide the bar, and when the upper blade falls, the chamfer often causes the deformation of the end face of the bar during shearing due to the existence of the chamfer, so that it is not a circular end face, and such a bar often suffers from the accountability of the buyer in the market.

[0003] Therefore, an improved cold shears blade is needed to effectively avoid the formation of the special-shaped bar end face. SUMMARY

[0004] The main purpose of the utility model is to provide an improved cold shears blade, by moving the shearing groove B on the lower blade to the inside of the lower blade to the same height as the chamfer, so that the chamfer can make the bar more easily enter the shearing groove B during shearing, and when the shearing groove A cooperates with the shearing groove B, it can form a circle with the same cross section as the bar to shear, avoiding the deformation of the end face of the sheared bar.

[0005] To achieve the above purpose, the utility model adopts the technical scheme that:

[0006] An improved cold shears blade, comprising,

[0007] An upper blade, the shearing side of the upper blade is provided with a plurality of shearing grooves A along the length direction;

[0008] A lower blade, the shearing side of the lower blade is provided with a plurality of shearing grooves B along the length direction, the outer edge of the shearing groove B is provided with a chamfer, the number of the shearing groove B is the same as that of the shearing groove A, and the positions are matched;

[0009] Wherein, the height of the groove opening of the shearing groove B from the upper surface of the lower blade is the same as the height of the chamfer, the shearing groove A and the shearing groove B are respectively semicircular grooves with a radius R, wherein R is the radius of the bar to be sheared.

[0010] Further, the upper shear blade and the lower shear blade are both provided with mounting holes 30, and the mounting holes 30 are symmetrically arranged.

[0011] Further, the mounting holes 30 in the upper shear blade are arranged between the shear grooves A, and the mounting holes are counter-sunk bolt holes.

[0012] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0013] The patent is provided with a chamfer at the groove opening of the shear groove B on the lower shear blade, so that the bar transported to the cold shearing device can more easily enter the shear groove B, and at the same time, the shear groove B is moved into the lower shear blade by a depth equal to the height of the chamfer, so that the shear groove A and the shear groove B can wrap the to-be-cut bar in a complete shearing circle when the bar is cut, so that the end face of the cut bar is a circular face and is not easy to be deformed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The patent is provided with a chamfer at the groove opening of the shear groove B on the lower shear blade, so that the bar transported to the cold shearing device can more easily enter the shear groove B, and at the same time, the shear groove B is moved into the lower shear blade by a depth equal to the height of the chamfer, so that the shear groove A and the shear groove B can wrap the to-be-cut bar in a complete shearing circle when the bar is cut, so that the end face of the cut bar is a circular face and is not easy to be deformed.

[0015] Figure 2 The patent is provided with a chamfer at the groove opening of the shear groove B on the lower shear blade, so that the bar transported to the cold shearing device can more easily enter the shear groove B, and at the same time, the shear groove B is moved into the lower shear blade by a depth equal to the height of the chamfer, so that the shear groove A and the shear groove B can wrap the to-be-cut bar in a complete shearing circle when the bar is cut, so that the end face of the cut bar is a circular face and is not easy to be deformed. DETAILED DESCRIPTION

[0016] As Figure 1 shown, an improved cold shearing shear blade comprises,

[0017] an upper shear blade 10, a shear side of the upper shear blade 10 is provided with a plurality of shear grooves A101 along the length direction;

[0018] a lower shear blade 20, a shear side of the lower shear blade 20 is provided with a plurality of shear grooves B201 along the length direction, the shear grooves B201 are provided with chamfers 202 at outer edges, the shear grooves B102 and the shear grooves A101 are the same in number and are matched in position;

[0019] wherein, the shear groove B201 groove opening distance the upper surface height of the lower shear blade 20 and the chamfer 202 height is the same, the shear groove A101, shear groove B102 is a semicircular groove with a radius R respectively, wherein R is the radius of the to-be-cut bar.

[0020] Further, in order to ensure the stability of the shear force, the upper shear blade 10 and the lower shear blade 20 are both provided with mounting holes 30, and the mounting holes 30 are symmetrically arranged, and in order to improve the overall installation strength of the shear blade when the shear blade is installed with bolts, the mounting holes 30 in the upper shear blade 10 are arranged between the shear grooves A101, and the mounting holes 30 are counter-sunk bolt holes.

[0021] As Figure 2, the height of the chamfer at the notch of the shearing groove B201 is h, and the height of the notch of the shearing groove B201 from the upper surface of the lower shear blade 20 is h, so that when working, the upper shear blade 10 and the lower shear blade 20 perform shearing, and between the shearing groove A101 and the shearing groove B201, a base circle with the same size as the bar can be formed, thereby ensuring the round surface of the sheared bar.

Claims

1. An improved cold shear blade, characterized in that, include, The upper shear blade (10) has multiple shear grooves A (101) along its length on the shearing side. The lower shear blade (20) has multiple shear grooves B (201) along its length on the shearing side. The outer edge of the shear grooves B (201) has a chamfer (202). The number of shear grooves B (102) is the same as that of shear grooves A (101), and their positions match. Wherein, the height of the groove opening of the shearing groove B (201) from the upper surface of the lower shear blade (20) is the same as the height of the chamfer (202), and the shearing groove A (101) and shearing groove B (102) are semi-circular grooves with a radius of R, where R is the radius of the bar to be sheared.

2. The improved cold shear blade according to claim 1, characterized in that, The upper shear blade (10) and the lower shear blade (20) are both provided with mounting holes (30), and the mounting holes (30) are symmetrically arranged.

3. An improved cold shear blade according to claim 2, characterized in that, The mounting holes (30) in the upper shear blade (10) are spaced apart between the shear grooves A (101), and the mounting holes (30) are countersunk bolt holes.

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