CN211638132U

CN211638132U - Cutting edge with four cutting surfaces

Info

Publication number: CN211638132U
Application number: CN201921769301.5U
Authority: CN
Inventors: 王慧敏; 王静
Original assignee: Shanghai Hamp Hydraulic Machinery Co ltd
Current assignee: Shanghai Hamp Hydraulic Machinery Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-10-09
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a cutting edge with four cutting planes, a serial communication port, including cutting edge and bolted connection mounting hole, the four sides of cutter arbor all are equipped with the cutting edge, are equipped with the bolt mounting hole in the middle of the cutter arbor, and bolt mounting hole and cutter arbor four sides interval difference are less than or equal to 0.1 mm. The utility model discloses change at cutting edge installation form makes the cutting edge change need not to dismantle hydraulic pressure scissors's cylinder liner and piston, has the time of saving on-the-spot workman and changing the cutting edge, more gets rid of the hydraulic oil leakage that the cylinder liner and the piston that unload hydraulic pressure scissors brought, keeps the place clean. The cutting edge adopts the design of four surfaces, and has three more working surfaces than one working surface, thereby having the characteristic of greatly improving the service life.

Description

Cutting edge with four cutting surfaces

Technical Field

The utility model relates to a cutting edge with four cutting planes belongs to high-speed wire rod and cuts the field.

Background

A cutting edge of hydraulic scissors is used for removing heads, tails and samples in the production process of high-speed wires and bars. The shearing machine can be suitable for shearing high-speed wire rods, large coils and bar materials of various materials and specifications produced by most domestic steel mills.

1. The prior knife edge is made of tool steel T10 and cold-work grinding tool steel Cr12MoV materials by referring to a blade material of a plate shearing machine. The tool steel T10 has low toughness and high wear resistance, and is suitable for manufacturing tools which are not subject to sudden or violent vibration, such as turning tools, planing tools, wire drawing dies, drill bits, screw taps and the like, and tools of which the cutting edge does not heat up during working. The cold-work grinding tool steel Cr12MoV has higher hardenability, hardness, wear resistance and plasticity, and has small deformation but poor high-temperature plasticity. It can be used for making various casting and forging dies, cold cutting scissors, circular saw, gauge, thread rolling die, etc. But facing the diversification of materials and specifications, the enhancement of yield strength and shearing strength and the increase of hardness of high-speed wires in domestic steel mills, the temperature of the wires is low (200-300 ℃), cold shearing or hot shearing is needed, and the high-strength and high-hardness high-speed wires have considerable vibration during shearing. At present, the cutting edge is difficult to perform shearing work, and the service life is reduced.

2. At present, the cutting edge adopts a trimming design, the eccentric load condition is reduced by centering shearing force, but the trimming can only use the working surface of the trimming, only one surface is used, the service surface is few, and the service life is short (see figure 1).

3. At present, the cutting edge is connected with a pin by a piston, the connecting part is arranged in a cylinder sleeve, and the cylinder sleeve must be detached when the cutting edge is changed. The piston and the knife are taken down together, and then the pin is taken to separate the piston and the knife edge. After the blade is replaced, the blade is connected with the piston by a pin and is arranged back into the hydraulic scissors together (see figure 2).

Disclosure of Invention

The to-be-solved technical problem of the utility model is: how to increase the service life of the blade, how to increase the range of the shearing materials of the blade, and how to make the blade convenient to disassemble.

In order to solve the technical problem, the technical scheme of the utility model a cutting edge with four cutting planes is provided, a serial communication port, including cutting edge and bolt mounting hole, the four sides of cutter arbor all are equipped with the cutting edge, are equipped with the bolt mounting hole in the middle of the cutter arbor, and bolt mounting hole and cutter arbor four sides interval difference are less than or equal to 0.1 mm.

Preferably, the adjacent surfaces of the cutter bar are mutually vertical and parallel.

Preferably, the hole opening of the bolt mounting hole is provided with a chamfer.

The core component of the utility model is a cutting edge. Therefore, the utility model has the following several characteristics:

1 the cutting edge adopts hot-work grinding tool steel material and air-quenched hot-work die steel, has better wear resistance at the middle temperature (about 600 ℃), good toughness and high-temperature hardness and long service life, and is used for manufacturing alloy die-casting dies such as aluminum, magnesium, copper, brass and the like, tools for hot extrusion and perforation and press forging dies. The material has good toughness, can bear certain vibration and resist the vibration generated when the blade shears the high-strength and high-hardness high-speed wire rod. The material has high-temperature hardness and can be used for hot shearing or cold shearing high-speed wire rods. Good wear resistance and can be suitable for shearing various materials.

2 the cutting edge adopts the design of four sides, and the shear plane becomes four faces from a face, and the working face increases, directly increases four times in the condition life-span that shearing material, hardness, specification are the same. The eccentric shearing force causes the increase of the eccentric load force, and the eccentric load force is resisted by the increased guide belt of the piston on the hydraulic scissors.

3. The cutting edge is designed by using a middle countersunk head screw hole, the inner hexagonal screw is connected with the piston, the screw can be taken out from the head of the cutting edge, the cutting edge can be directly drawn out from the hydraulic scissors, and a cylinder sleeve and the piston of the hydraulic scissors do not need to be disassembled. The blade is fast and convenient to replace, the required time is short, and the blade can be directly replaced on site at the working station of the hydraulic scissors.

Generally, the change of the installation form of the cutting edge enables the cutting edge to be replaced without detaching a cylinder sleeve and a piston of the hydraulic scissors, saves the time for replacing the cutting edge by field workers, removes hydraulic oil leakage caused by detaching the cylinder sleeve and the piston of the hydraulic scissors, and keeps the field clean. The cutting edge adopts the design of four surfaces, and three working surfaces are added compared with one working surface, so that the service life is greatly prolonged.

Drawings

FIG. 1 is a schematic view of a current blade structure;

FIG. 2 is a schematic view of the connection between the blade and the piston;

fig. 3 is a structural cross-sectional view of a blade having four cutting surfaces according to the present invention;

fig. 4 is a front view of a blade having four cutting surfaces in accordance with the present invention;

fig. 5 is a schematic structural view of a blade having four cutting surfaces according to the present invention.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Firstly, the cutting edge is made of hot die steel materials, preheating is carried out at 790 ℃, heating and heat preservation are carried out at 1000 ℃ (salt bath) or 1010 ℃ (furnace controlled atmosphere) for 5-15 min, air cooling is carried out, and tempering is carried out at 550 ℃.

And secondly, obtaining 16 cutting edges with different hardness in three batches by controlling tempering time, wherein the hardness is HRC 52-56 in batch A, HRC56-60 in batch B and HRC 60-64 in batch C. The cutting edge was attached to a hydraulic scissors, and 200 shearing experiments were performed on 16 wires in total of four materials (Q235, 45#, 40Cr, GCr15) of four specifications (φ 6, φ 10, φ 15, φ 20).

The experimental results are as follows:

batch A: the four gauge wires of Q235 and 45# were sheared without significant deformation of the blade. The rear cutting edge of the four gauge wires of 40Cr is deformed, and the rear cutting edge of the four gauge wires of GCr15 is seriously deformed.

Batch B: the four gauge wires of Q235 and 45# were sheared without significant deformation of the blade. The rear blade for cutting four gauge wires of 40Cr is slightly deformed, and the rear blade for cutting four gauge wires of GCr15 is slightly deformed compared with the blade of batch A.

And C, batch: the four gauge wires of Q235 and 45# were sheared without significant deformation of the blade. The rear edges of the four gauge wires of 40Cr are slightly deformed after being sheared, and the rear edges of the four gauge wires of GCr15 which are not sheared are broken.

Consider that wire rod, the specification of steel mill are more diversified, unable one-to-one customization cutting edge, need a cutting edge to correspond multiple condition, combine the experimental result, HRC56 ~ 60 is got to cutting edge 1 hardness.

As shown in fig. 3, 4 and 5, the cutting edge with four cutting surfaces is characterized by comprising a cutting edge 1 and a bolt mounting hole 2, wherein the cutting edge 1 is arranged on four sides of a cutter bar 3, the bolt mounting hole 2 is arranged in the middle of the cutter bar 3, and the difference between the four sides of the bolt mounting hole 2 and the four sides of the cutter bar 3 is less than or equal to 0.1 mm. The cutting edge 1 is not blunted, but needs to be deburred; the blade 1 must be heat treated: quenching HRC 56-60; note that the orifice of the bolt mounting hole 2 must be chamfered; the difference value between the distances between the bolt mounting hole 2 and the four sides is less than or equal to 0.1 mm.

Claims

1. The utility model provides a cutting edge with four cutting planes, its characterized in that includes cutting edge (1) and bolt mounting hole (2), and the four sides of cutter arbor (3) all are equipped with cutting edge (1), and the middle bolt mounting hole (2) that is equipped with of cutter arbor (3), bolt mounting hole (2) and cutter arbor (3) four sides interval difference is less than or equal to 0.1 mm.

2. A cutting edge having four cutting faces as claimed in claim 1, characterized in that the shank (3) is perpendicular to each other with adjacent faces parallel.

3. A four-facet cutting edge according to claim 1, wherein the opening of the bolt receiving hole (2) is chamfered.