Improved mechanism for half-round shears

Abstract

The present application relates to a kind of improved mechanisms of half-round shears, including rotatable hook block arranged at the cutting edge end of shear knife, one end of hook block is provided with rotating mechanism, the other end of hook block is provided with elastic mechanism, before shearing, rotating mechanism makes hook block hook the shearing material, after shearing, elastic mechanism makes hook block lift up and leave the shearing material.The present application has simple structure, low cost, easy to manufacture, good uniformity, high qualified rate and production efficiency, strong practicability.

Description

Technical Field

[0001] This invention relates to the field of fastener manufacturing, and more particularly to an improved mechanism for a semicircular shear. Background Technology

[0002] like Figure 1 As shown, in existing fastener production, the raw material blank 10 is first sent out from the discharge pipe 20 and cut into blanks 11 by a shearing blade (also known as a semi-circular shear) 30 (Note: before cutting, it is called the raw material blank 10; after cutting, it is called blank 11). Then, the blank 11 is clamped by a clamping pliers (not shown in the figure) and sent to the die cavity (not shown in the figure) for cold heading and other processing. However, the existing semi-circular shear equipment has the following defects:

[0003] (1) During the shearing process, the material to be punched 11 is prone to bend to one side, which causes the cut surface 12 of the cut to be non-parallel to the cross section of the material to be punched 11, resulting in a low pass rate, which affects normal production and causes economic losses.

[0004] (2) If other auxiliary equipment (not shown in the figure) is used, the initial blank 10 has many varieties with different fastener specifications, which leads to an increase in the number of auxiliary equipment models and specifications, increases equipment costs, and makes it impossible to achieve uniformity of auxiliary equipment.

[0005] To address these issues, this solution proposes an improved semicircular shear mechanism to overcome the aforementioned shortcomings. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of existing semi-circular shearing equipment, which suffer from the tendency of the material to be punched to bend at an angle, resulting in substandard cuts and affecting production. Furthermore, the use of auxiliary equipment increases the variety of models and specifications, making standardization difficult and increasing equipment costs. The specific solution is as follows:

[0007] An improved mechanism for a semi-circular shear includes a rotatable hook block disposed at the blade end of the shearing blade. One end of the hook block is provided with a rotating mechanism, and the other end of the hook block is provided with an elastic mechanism. Before shearing, the rotating mechanism causes the hook block to hook onto the material to be sheared. After shearing, the elastic mechanism causes the hook block to lift upward and leave the material to be sheared.

[0008] Furthermore, the hook block is saddle-shaped.

[0009] Furthermore, the rotating mechanism includes a rotating shaft located near the blade end of the shearing blade and a rotating shaft hole located at one end of the hook block.

[0010] Furthermore, a positioning mechanism is provided on the shearing blade body on the lower side of the pivot hole to prevent the hook block from drooping and blocking the discharge pipe of the sheared material.

[0011] Further, the positioning mechanism comprises a positioning column arranged on the cutter body, an arc-shaped guide rail arranged outside the pivot hole of the hook block, and an arc-shaped positioning port.

[0012] Further, the arc-shaped guide rail matches the positioning column, and the arc-shaped guide rail rotates along the positioning column.

[0013] Further, the arc-shaped positioning port matches the positioning column, and the arc-shaped positioning port is locked by the positioning column in the clockwise direction.

[0014] Further, the middle part of the cutter edge is a semicircular cutout, the semicircular cutout matches the shape of the cross section of the shearing material, and the cross section of the shearing material outside the semicircular cutout is hooked by the side inner wall of the inner groove of the other end of the hook block.

[0015] Further, the elastic mechanism comprises a tension spring with one end fixed to the spring hole on the other end of the hook block, and the other end of the tension spring is fixed to the machine tool above the cutter.

[0016] Further, the other end of the cutter away from the edge is fixed to the telescopic shaft moving in the transverse direction, when the telescopic shaft is retracted, the tension spring is relaxed, the hook block rotates clockwise under the action of gravity, the hook block hooks the shearing material, when the telescopic shaft is extended, the tension spring is tightened and the hook block rotates counterclockwise, and the hook block leaves the shearing material.

[0017] In summary, the technical scheme of the present application has the following beneficial effects:

[0018] The present scheme solves the problems of the existing semicircular shearing equipment, such as the bending of the material to be punched, the unqualified cutting edge, the influence on production, the increase of the auxiliary equipment types and specifications, the non-uniformity, and the increase of the equipment cost. The present scheme ingeniously adds a rotatable saddle-shaped hook block, a tension spring assembly, and a positioning column to the original semicircular shearing equipment, which is simple in structure, solves the problems of preventing the bending of the material to be punched, unifying various types of materials to be punched (only the matching saddle-shaped hook block needs to be replaced), improving the qualification rate and production efficiency, and is simple in structure, low in cost, easy to manufacture, good in uniformity, high in qualification rate and production efficiency, and strong in practicality. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1A top view of an existing semicircular shearing device;

[0021] Figure 2 This is a structural diagram of an improved semicircular shear mechanism according to the present invention;

[0022] Figure 3 This is a schematic diagram of the improved semicircular shear mechanism of the present invention after cutting.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10-Raw material blank, 11-Punching material, 12-Cut surface, 13-Sheared material, 20-Discharge pipe, 30-Shearing blade, 31-Positioning post, 32-Semi-circular cut, 40-Hook block, 41-Rotating shaft hole, 42-Arc-shaped guide rail, 43-Arc-shaped positioning port, 44-Inner groove, 45-Spring hole, 50-Rotating shaft, 60-Tension spring, 70-Machine tool, 80-Telescopic shaft. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] like Figure 2 , 3 As shown, an improved mechanism for a semi-circular shear includes a rotatable hook block 40 disposed at the blade end of the shearing blade 30. One end of the hook block 40 is provided with a rotating mechanism, and the other end of the hook block 40 is provided with an elastic mechanism. Before shearing, the rotating mechanism causes the hook block 40 to hook the shearing material 13 (that is, the raw material blank 10 before shearing and the blank to be punched 11 after shearing, as mentioned in the background art). After shearing, the elastic mechanism causes the hook block 40 to lift upward and leave the shearing material 13.

[0027] Specifically, the hook block 40 is saddle-shaped. The rotating mechanism includes a rotating shaft 50 located near the blade end of the shearing blade 30, and a rotating shaft hole 41 located at one end of the hook block 40. A positioning mechanism is provided on the shearing blade 30 body below the rotating shaft hole 41 to prevent the hook block 40 from sagging and blocking the discharge pipe 20 of the sheared material 13 (see reference). Figure 1 (As shown).

[0028] Specifically, the positioning mechanism includes a positioning post 31 on the shearing blade 30, an arc-shaped guide rail 42 and an arc-shaped positioning port 43 located outside the pivot hole 41 of the hook block 40. The arc-shaped guide rail 42 matches the positioning post 31 and rotates along the positioning post 31. The arc-shaped positioning port 43 matches the positioning post 31 and is locked by the positioning post 31 in a clockwise direction.

[0029] Further, the middle part of the cutting edge end of the cutting knife 30 is a semicircular cut 32, which matches the cross section of the sheared material 13, and the cross section of the sheared material 13 outside the semicircular cut 32 is blocked by the side inner wall of the inner groove 44 on the side of the hook block 40.

[0030] Specifically, the elastic mechanism includes a tension spring 60 fixed at one end to the spring hole 45 on the other end upper part of the hook block 40, and the other end of the tension spring 60 is fixed to the machine tool 70 above the cutting knife 30.

[0031] Further, the other end of the cutting knife 30 away from the cutting edge end is fixed to the horizontally moving telescopic shaft 80, when the telescopic shaft 80 is retracted, the tension spring 60 is relaxed, the hook block 40 rotates clockwise under the action of gravity, the hook block 40 hooks the sheared material 13, when the telescopic shaft 80 is extended, the tension spring 60 is tightened and makes the hook block 40 rotate counterclockwise, the hook block 40 (lifted upward) leaves the sheared material 13.

[0032] In summary, the technical scheme of the present application has the following beneficial effects:

[0033] The present scheme solves the problems of existing semicircular shearing equipment, such as the bending of the material to be punched, resulting in unqualified cutting edge, affecting production, and the increase of auxiliary equipment types and specifications, which cannot be unified and increases the cost of equipment. The present scheme ingeniously adds a rotatable saddle-shaped hook block, a tension spring assembly, and a positioning column to the original semicircular shearing equipment, which is simple in structure and solves the problems of preventing the bending of the material to be punched, unifying various types of materials to be punched (only the matching saddle-shaped hook block needs to be replaced), improving the qualification rate and production efficiency. In summary, the present scheme is simple in structure, low in cost, easy to manufacture, good in uniformity, high in qualification rate and production efficiency, and strong in practicality.

[0034] The above-described embodiments do not constitute a limitation on the protection scope of the technical scheme. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments shall be included in the protection scope of the technical scheme.

Claims

1. An improved mechanism for a half-round shears, characterized by: The hook block is saddle-shaped. The rotating mechanism includes a rotating shaft near the cutting edge of the cutting knife and a rotating shaft hole at one end of the hook block. A positioning mechanism is arranged on the lower side of the rotating shaft hole of the cutting knife body to prevent the hook block from falling and blocking the discharge pipeline of the cutting material. The positioning mechanism includes a positioning column arranged on the cutting knife body and an arc-shaped guide rail and an arc-shaped positioning hole arranged outside the rotating shaft hole of the hook block. The middle part of the cutting edge of the cutting knife is a semicircular notch, the semicircular notch matches the shape of the cross section of the cutting material, and the cross section of the cutting material outside the semicircular notch is hooked by the inner wall of the inner groove of the saddle-shaped inner groove on the side of the other end of the hook block. The elastic mechanism includes a tension spring with one end fixed to the spring hole on the other end of the hook block and the other end fixed to the machine tool above the cutting knife. The other end of the cutting knife away from the cutting edge is fixed to a horizontally moving telescopic shaft, when the telescopic shaft is retracted, the tension spring is relaxed, the hook block rotates clockwise under the action of gravity, the hook block hooks the cutting material, when the telescopic shaft is extended, the tension spring is tightened and the hook block rotates counterclockwise, the hook block leaves the cutting material. The arc-shaped guide rail matches the positioning column, and the arc-shaped guide rail rotates along the positioning column.

2. The improvement in a half round shears according to claim 1 wherein: The arc-shaped positioning hole matches the positioning column, and the arc-shaped positioning hole is locked in the clockwise direction by the positioning column.

3. The improvement in a half round shears according to claim 2 wherein: ​

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