CN214815398U - Left-handed right-cutting reamer - Google Patents
Left-handed right-cutting reamer Download PDFInfo
- Publication number
- CN214815398U CN214815398U CN202120098083.8U CN202120098083U CN214815398U CN 214815398 U CN214815398 U CN 214815398U CN 202120098083 U CN202120098083 U CN 202120098083U CN 214815398 U CN214815398 U CN 214815398U
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- cutting
- handed
- neck
- reamer
- cutter
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- 238000003754 machining Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 230000035929 gnawing Effects 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The utility model discloses a left-handed and right-handed reamer, which comprises a cutter body, wherein the cutter body comprises a cutting part, a neck part and a handle part, a step is arranged between the neck part and the handle part, one end with small diameter of the step is connected with the neck part, and the other end with large diameter is connected with the handle part; the cutting part is provided with a taper, and one end of the cutting part with a small diameter is connected with the neck part; the cutting part outer wall is provided with circumference spiral sword, circumference spiral sword is followed the tip of cutting part and is extended to the clockwise spiral of neck, be provided with the chip groove between the circumference spiral sword. The circumferential spiral blade of the utility model spirally extends clockwise, the cutter body rotates anticlockwise for cutting, the cutting chips are discharged downwards, the cutting and the hole wall contact and damage to the hole wall are avoided, and the processing quality is improved; the cutting part is provided with inverted small taper, so that the contact area of the cutting part and a machining surface is reduced, the vibration of the cutter is reduced, vibration lines are avoided, and the machining precision is improved.
Description
Technical Field
The utility model relates to a processing cutter especially relates to a levogyration right cutting reamer.
Background
The reamer is used for reaming drilled (or reamed) holes on a workpiece, mainly aims at improving the processing precision of the holes and reducing the roughness of the surface of the drilled (or reamed) holes, is a tool for fine processing and semi-fine processing of the holes, has small processing allowance, and is widely used in the mechanical processing process.
At present, the requirement on the machining precision through a reamer is higher and higher, the existing reamer mostly adopts a right-handed left-handed cutting structure, namely, a cutter rotates clockwise for cutting, chips are discharged upwards along a chip discharge groove, and the chips are contacted with a machining surface again during discharging to influence the surface machining quality; in addition, the cutting edges are positioned on the same cylindrical surface, and the contact area between the cutting edge part and the machined surface is large at the same time during machining, so that the cutter vibrates, vibration lines are generated, and the surface machining quality is influenced. Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a levogyration right angle cutting reamer is provided, solve the not enough problem of current reamer machining precision.
The utility model provides a left-handed and right-handed reamer, which comprises a cutter body, wherein the cutter body comprises a cutting part, a neck part and a handle part, a step is arranged between the neck part and the handle part, the step is conical, one end of the step with small diameter is connected with the neck part, and the other end with large diameter is connected with the handle part; the cutting part is provided with a taper, and one end of the cutting part with a small diameter is connected with the neck part; the outer wall of the cutting part is provided with a circumferential spiral blade, the circumferential spiral blade spirally extends from the end part of the cutting part to the neck part in the clockwise direction, the cutter body rotates anticlockwise to cut, and a chip groove is formed between the circumferential spiral blades.
Further, the number of the circumferential spiral blades is 6.
Furthermore, the taper of the cutting part is 0.03-0.05: 100, and the diameter of the neck part is slightly smaller than the minimum diameter of the cutting part.
Furthermore, the end face of the cutting part and the outer wall surface of the cutting part form an arc chamfer, and the radius of the arc chamfer is 0.8 mm.
Further, the front angle formed by the contact of the circumferential spiral blade and the workpiece is 4-6 degrees; the circumferential spiral blade and the wall surface of the chip groove opposite to the rotating direction of the cutter body form a spiral blade rear cutter surface, and the spiral blade rear cutter surface is contacted with a machined part to form a rear angle of 5-8 degrees.
Further, the helix angle of the chip groove is 35-38 degrees.
Further, the material of the cutter main body is a hard alloy bar with Co content larger than 6% and granularity of 0.4-0.8 um.
The utility model discloses contrast prior art has following beneficial effect: the utility model provides a left-handed and right-handed reamer, the circumferential spiral blade spirally extends clockwise, the cutter body rotates anticlockwise for cutting, the cutting chips are discharged downwards, the cutting and the hole wall contact are avoided to damage the hole wall, and the processing quality is improved; the cutting edge of the reamer is prevented from being cut and pulled, and the service life is prolonged; the cutting part is provided with inverted small taper, so that the contact area of the blade part and a processing surface is reduced, the vibration of a cutter is reduced, vibration lines are avoided, and the processing precision is improved; the circumferential spiral blade is provided with a front angle and a rear angle with small angles, so that the sharpness of the blade is improved, and the influence on the surface roughness of a workpiece caused by gnawing the blade is avoided; the chip groove is provided with a large helical angle, so that the processing is more stable, the cutting resistance is reduced, the abrasion is reduced, and the service life of the cutter is prolonged.
Drawings
Fig. 1 is a schematic structural view of a left-handed and right-handed reamer according to an embodiment of the present invention;
fig. 2 is an enlarged view of the cutting portion of the left-handed and right-handed reamer according to an embodiment of the present invention.
In the figure:
1. a handle; 2. a neck portion; 3. a cutting portion; 4. a step; 5. a circumferential helical blade; 6. a chip groove; 7. chamfering with an arc; 8. spiral blade flank face.
Detailed Description
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic view of a left-handed and right-handed reamer according to an embodiment of the present invention.
Referring to fig. 1, the left-handed and right-handed reamer according to the embodiment of the present invention includes a cutter body, the cutter body includes a cutting portion 3, a neck portion 2 and a handle portion 1, a step 4 is disposed between the neck portion 2 and the handle portion 1, the step 4 is conical, one end of the step 4 with a small diameter is connected to the neck portion 2, and one end of the step 4 with a large diameter is connected to the handle portion 1; the cutting part 3 is provided with a taper, and one end of the cutting part 3 with a small diameter is connected with the neck part 2; the outer wall of the cutting part 3 is provided with 6 circumferential spiral blades 5, the circumferential spiral blades 5 spirally extend from the end part of the cutting part 3 to the neck part 2 in a clockwise direction, the cutter body rotates anticlockwise for cutting, chips are discharged downwards, the chips are prevented from contacting with the hole wall and damaging the hole wall, and the processing quality is improved; the cutting edge is prevented from being damaged by cutting chips, and the service life is prolonged.
Specifically, chip grooves 6 are arranged between the circumferential spiral blades 5; the spiral angle of the chip groove 6 is 35-38 degrees. The chip groove 6 is provided with a large helical angle, so that the processing is more stable, the cutting resistance is reduced, the abrasion is reduced, and the service life of the cutter is prolonged.
Referring to fig. 2, in the left-handed and right-handed reamer according to the embodiment of the present invention, the taper of the cutting portion 3 is 0.03-0.05: 100, and the diameter of the neck portion 2 is slightly smaller than the minimum diameter of the cutting portion 3. The cutting part 3 is provided with inverted small taper, so that the contact area of the cutting part and a processing surface is reduced, the vibration of the cutter is reduced, vibration lines are avoided, and the processing precision is improved.
Specifically, the circumferential spiral blade 5 contacts with a workpiece to form a front angle of 4-6 degrees; the circumferential spiral blade 5 and the wall surface of the chip groove opposite to the rotation direction of the cutter body form a spiral blade rear cutter surface 8, and the spiral blade rear cutter surface 8 is in contact with a machined part to form a rear angle of 5-8 degrees. Circumferential spiral sword 5 sets up the anterior angle and the relief angle of small angle, improves the cutting part sharpness, avoids gnawing the sword and influences the surface roughness of work piece.
Preferably, the end face of the cutting part 3 and the outer wall surface of the cutting part 3 form a circular chamfer 7, and the radius of the circular chamfer 7 is 0.8 mm. The arc chamfer 7 guides to avoid scratching the hole wall.
Preferably, the material of the cutter main body is a hard alloy bar stock with Co content more than 6% and granularity of 0.4 um-0.8 um. The strength of the cutter main body is ensured.
To sum up, the left-handed and right-handed reamer of the embodiment of the utility model has the advantages that the circumferential spiral blade 5 spirally extends clockwise, the cutter body rotates anticlockwise for cutting, the cutting chips are discharged downwards, the cutting chips are prevented from contacting with the hole wall to damage the hole wall, and the processing quality is improved; the cutting edge is prevented from being damaged by cutting chips, and the service life is prolonged; the cutting part 3 is provided with inverted small taper, so that the contact area of the blade part and a processing surface is reduced, the vibration of a cutter is reduced, vibration lines are avoided, and the processing precision is improved; the circumferential spiral blade 5 is provided with a front angle and a rear angle with small angles, so that the sharpness of the blade part is improved, and the influence on the surface roughness of a workpiece caused by cutter gnawing is avoided; the chip groove 6 is provided with a large helical angle, so that the processing is more stable, the cutting resistance is reduced, the abrasion is reduced, and the service life of the cutter is prolonged.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The left-handed and right-handed reamer is characterized by comprising a cutter body, wherein the cutter body comprises a cutting part, a neck part and a handle part, a step is arranged between the neck part and the handle part, the step is conical, one end of the step with the small diameter is connected with the neck part, and the other end of the step with the large diameter is connected with the handle part; the cutting part is provided with a taper, and one end of the cutting part with a small diameter is connected with the neck part; the outer wall of the cutting part is provided with a circumferential spiral blade, the circumferential spiral blade spirally extends from the end part of the cutting part to the neck part in the clockwise direction, the cutter body rotates anticlockwise to cut, and a chip groove is formed between the circumferential spiral blades.
2. The left-right cutting reamer of claim 1 wherein the number of circumferential helical edges is 6.
3. The left-handed and right-handed reamer of claim 1 wherein the taper of the cutting portion is 0.03 to 0.05:100 and the neck diameter is slightly less than the minimum diameter of the cutting portion.
4. The left-handed and right-handed reamer of claim 1 wherein the end surface of the cutting portion and the outer wall surface of the cutting portion form an arc chamfer having a radius of 0.8 mm.
5. The left-handed right-cutting reamer of claim 3 wherein the circumferential helical edge contacts the workpiece at a rake angle of between 4 ° and 6 °; the circumferential spiral blade and the wall surface of the chip groove opposite to the rotating direction of the cutter body form a spiral blade rear cutter surface, and the spiral blade rear cutter surface is contacted with a machined part to form a rear angle of 5-8 degrees.
6. The left-handed and right-handed reamer of claim 1 wherein the flute helix angle is 35 ° to 38 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120098083.8U CN214815398U (en) | 2021-01-14 | 2021-01-14 | Left-handed right-cutting reamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120098083.8U CN214815398U (en) | 2021-01-14 | 2021-01-14 | Left-handed right-cutting reamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214815398U true CN214815398U (en) | 2021-11-23 |
Family
ID=78882630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120098083.8U Active CN214815398U (en) | 2021-01-14 | 2021-01-14 | Left-handed right-cutting reamer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214815398U (en) |
-
2021
- 2021-01-14 CN CN202120098083.8U patent/CN214815398U/en active Active
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