CN215966495U

CN215966495U - Reamer for preventing edge breakage of orifice of iron casting material

Info

Publication number: CN215966495U
Application number: CN202120083742.0U
Authority: CN
Inventors: 李振丰; 奚旭东; 孔小波
Original assignee: D&m Suzhou Precision Cutting Tools Co ltd
Current assignee: D&m Suzhou Precision Cutting Tools Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2022-03-08
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a reamer for preventing edge breakage of an orifice of an iron casting material, which comprises an edge part and a handle part, wherein the edge part comprises a drill point, a cutting edge, a double-chamfer combined edge, a back of a knife, a chip groove and a stepped edge, the drill point is arranged at the head part of the edge part, the cutting edge extends from the drill point to the double-chamfer combined edge, the length of the cutting edge is 6m, the stepped edge is arranged at a position close to the tail part of the edge part, a rear knife face is formed between adjacent cutting edges, an internal cooling hole is arranged on the rear knife face, the edge part and the handle part are provided with internal cooling channels communicated with the internal cooling hole, the back of the knife extends from the double-chamfer combined edge to the tail part of the edge part in a spiral manner, and the chip groove is arranged between the adjacent back of the knife. The cutting part adopts the design of double-chamfer combined edge, so that the strength of the double chamfers is better, the length of the cutting edge is increased, the impact on an outlet is reduced, and the phenomenon of edge breakage of the outlet surface of a through hole of a part is solved.

Description

Reamer for preventing edge breakage of orifice of iron casting material

Technical Field

The utility model relates to the technical field of cutters, in particular to a reamer for preventing an orifice of an iron casting material from edge collapse.

Background

The guide device of the valve guide pipe chamber automobile engine valve plays a role in guiding the movement of the valve, ensures that the valve does reciprocating linear motion, enables the valve to be correctly attached to a valve seat ring, and transfers the heat of a valve rod to a cylinder cover, so that the accuracy of a mounting hole for assembling the valve guide pipe and the cylinder cover of the valve directly influences the normal work and the durability of the valve. When a cutter is used for machining a mounting hole for assembling the valve guide pipe and the valve cylinder cover, the following machining difficulties exist:

(1) the inlet surface of the part is a casting surface, is irregular, has large impact on the cutting edge of the cutter, and needs to improve the strength of the cutting edge of the cutter while ensuring the cutting edge of the cutter;

(2) the bottom of the part is a through hole, the outlet surface is a casting surface, and the problem of edge breakage of the outlet surface frequently occurs when a cutter is used for machining.

Therefore, there is a need for a reamer for preventing edge chipping of an orifice of an iron casting material, which solves the above-mentioned processing problems.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in view of the above-mentioned problems and deficiencies in the prior art, it is an object of the present invention to provide a reamer for preventing edge chipping of an aperture in iron casting material.

The technical scheme is as follows: in order to achieve the purpose, the reamer for preventing the edge breakage of the orifice of the iron casting material comprises an edge part and a handle part, wherein the edge part comprises a drill tip, a cutting edge, a double-chamfer combined edge, a back of a knife, a chip groove and a stepped cutting edge, the drill tip is arranged at the head part of the edge part, the cutting edge extends from the drill tip to the double-chamfer combined edge, the length of the cutting edge is 6m, the stepped cutting edge is arranged at a position close to the tail part of the edge part, a rear knife face is formed between adjacent cutting edges, an internal cooling hole is formed in the rear knife face, internal cooling channels communicated with the internal cooling hole are formed in the edge part and the handle part, the back of the knife extends to the tail part of the edge part in a spiral mode from the double-chamfer combined edge, and the chip groove is arranged between the adjacent back of the knife.

Further, the double-chamfer combined edge comprises a first chamfer cutting edge and a second chamfer cutting edge, the first chamfer cutting edge is adjacent to the cutting edge, the included angle formed by the first chamfer cutting edge and the horizontal central axis is 50 degrees, and the included angle formed by the second chamfer cutting edge and the horizontal central axis is 20 degrees.

Furthermore, a first step blade zone and a second step blade zone are arranged on the knife back, and the width of the first step blade zone and the width of the second step blade zone are 1-2 mm.

Further, the angle of the drill tip is 140 °.

Further, the included angle formed by the stepped cutting edge and the horizontal central axis is 45 degrees.

Further, the blade and the shank are integrally formed.

According to the technical scheme, the utility model has the beneficial effects that:

(1) according to the reamer for preventing the edge breakage of the orifice of the iron casting material, the blade part adopts the design of the double-chamfer combined blade, so that the strength of the double chamfers is better, the length of the cutting blade is increased, the impact on the outlet is reduced, and the edge breakage phenomenon of the outlet surface of the through hole of the part is avoided.

(2) The reamer for preventing the edge of the orifice of the iron casting material from being broken has the advantages that the chip removal performance during the machining of the cutter is improved due to the spiral design of the chip removal groove, the heat generated by the cutter can be timely dissipated due to the design of the internal cooling hole and the internal cooling channel, and the service life of the cutter is prolonged.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of a double chamfer composite blade according to the present invention;

fig. 4 is a partial view of a part to be machined according to the present invention.

Detailed Description

The utility model is further elucidated with reference to the drawings and the embodiments.

The reamer for preventing the edge collapse of the orifice of the iron casting material comprises an edge part 1 and a handle part 2, wherein the edge part 1 is provided with a drill tip 11, a cutting edge 12, a double-chamfer combined edge 13, a back of the blade 14, a chip groove 15 and a stepped cutting edge 16, the drill tip 11 is arranged at the head part of the edge part 1, the cutting edge 12 extends from the drill tip 11 to the double-chamfer combined edge 13, the cutting edge 12 has an edge length of 6m, the stepped cutting edge 16 is arranged at a position close to the tail part of the edge part 1, a back of the blade 121 is formed between the adjacent cutting edges 12, an internal cooling hole 17 is formed in the back of the blade 121, the edge part 1 and the handle part 2 are provided with internal cooling channels 18 communicated with the internal cooling hole 17, the back of the blade 14 extends from the double-chamfer combined edge 13 to the tail part 1 in a spiral manner, and the chip groove 15 is arranged between the adjacent back of the blade 14 in a spiral manner.

As shown in fig. 3, the double-chamfer combined edge 13 includes a first chamfer edge 131 and a second chamfer edge 132, the first chamfer edge 131 is disposed adjacent to the cutting edge 12, an included angle between the first chamfer edge 131 and the horizontal central axis is 50 °, and an included angle between the second chamfer edge 132 and the horizontal central axis is 20 °.

And a first stepped blade zone 141 and a second stepped blade zone 142 are arranged on the blade back 14, and the widths of the first stepped blade zone 141 and the second stepped blade zone 142 are 1-2 mm.

The angle of the drill tip 11 is 140 ° in this embodiment.

In this embodiment, the angle between the stepped cutting edge 16 and the horizontal central axis is 45 °.

In the present embodiment, the blade 1 and the shank 2 are integrally formed.

The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as various equivalents will occur to those skilled in the art upon reading the present invention and are intended to be within the scope of the utility model as defined in the claims appended hereto.

Claims

1. A reamer for preventing edge chipping of an orifice of a cast iron material, comprising: including cutting part (1) and stalk portion (2), cutting part (1) is equipped with drill point (11), cutting edge (12), two chamfer combination sword (13), back of a knife blade (14), chip groove (15) and ladder cutting edge (16), drill point (11) set up the head at cutting part (1), and cutting edge (12) extend to two chamfer combination sword (13) departments from drill point (11), the blade length of cutting edge (12) is 6m, and ladder cutting edge (16) set up in the position that is close to cutting part (1) afterbody, wherein, constitute back knife face (121) between adjacent cutting edge (12), be equipped with interior cold hole (17) on back knife face (121), cutting part (1) and stalk portion (2) are equipped with interior cold aisle (18) that link up with interior cold hole (17), back of a knife blade (14) are from two chamfer combination sword (13) department spiral extension to the afterbody of cutting part (1), the chip grooves (15) are spirally arranged between the adjacent knife backs (14).

2. The reamer as claimed in claim 1, wherein the reamer is adapted to prevent the tipping of an aperture in iron casting material, and further comprises: the double-chamfer combined edge (13) comprises a first chamfer edge (131) and a second chamfer edge (132), wherein the first chamfer edge (131) is adjacent to the cutting edge (12), the included angle formed by the first chamfer edge (131) and the horizontal central axis is 50 degrees, and the included angle formed by the second chamfer edge (132) and the horizontal central axis is 20 degrees.

3. The reamer as claimed in claim 1, wherein the reamer is adapted to prevent the tipping of an aperture in iron casting material, and further comprises: the knife back (14) is provided with a first stepped blade area (141) and a second stepped blade area (142), and the widths of the first stepped blade area (141) and the second stepped blade area (142) are 1-2 mm.

4. The reamer as claimed in claim 1, wherein the reamer is adapted to prevent the tipping of an aperture in iron casting material, and further comprises: the angle of the drill tip (11) is 140 degrees.

5. The reamer as claimed in claim 1, wherein the reamer is adapted to prevent the tipping of an aperture in iron casting material, and further comprises: the included angle formed by the stepped cutting edge (16) and the horizontal central axis is 45 degrees.

6. The reamer as claimed in claim 1, wherein the reamer is adapted to prevent the tipping of an aperture in iron casting material, and further comprises: the blade part (1) and the handle part (2) are integrally formed.