CN217618163U - Compound reamer - Google Patents
Compound reamer Download PDFInfo
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- CN217618163U CN217618163U CN202123118098.5U CN202123118098U CN217618163U CN 217618163 U CN217618163 U CN 217618163U CN 202123118098 U CN202123118098 U CN 202123118098U CN 217618163 U CN217618163 U CN 217618163U
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Abstract
The utility model discloses a compound reamer, which comprises a hilt and a cutter head fixedly connected with the hilt, wherein the cutter head is spirally provided with a plurality of cutting edges along the length direction, chip grooves are correspondingly arranged between the cutting edges, and the cutting edges comprise a first cutting edge which is arranged at the front end of the cutter head and used for rough machining and a second cutting edge which is arranged at the rear end of the cutter head and used for finish machining; a breaking groove is arranged between the first cutting edge and the second cutting edge; the first cutting edge comprises a rough reaming part with rough reaming taper and a first guide part for trimming guide; the second cutting edge comprises a finish reaming part with finish reaming taper and a second guide part for guiding; the diameter of the circumference formed by the rotation of the coarse hinge part is smaller than that of the circumference formed by the rotation of the fine hinge part. The utility model discloses have the effect of thick hinge and finish reaming concurrently, it has reduced the cutter because of the vibration that the overhang overlength leads to, makes the finish reaming all the time be in its quality and the precision that effectively improves work piece pore wall surface of stable cutting state simultaneously, has effectively promoted reamer life simultaneously.
Description
Technical Field
The patent of the utility model relates to a spot facing work technical field, specifically speaking are double entry reamer.
Background
The reaming of the reamer is a method for cutting a trace metal layer from the hole wall of a workpiece so as to improve the dimensional precision and the surface quality of the hole, and is widely applied in production. For smaller holes, reaming with a reamer is a more efficient and economical process than internal grinding and fine boring.
At present, when machining allowance is uneven and staggered dowel pin holes or reaming batch pin holes with deviated hole positions, an inner hole cannot be corrected by adopting a conventional reamer, so that finish machining allowance is kept the same, and the machined inner hole has poor surface quality and even ultra-poor size, and a product is scrapped.
In the machining process, the problems that reaming margins are uneven and staggered are caused, or when a batch of pin holes are reamed and the positions of the holes are deviated, finishing margins are different, interrupted cutting causes poor surface quality of an inner hole, and vibration is caused in long-overhang reaming are also caused.
The Chinese patent document discloses a composite reamer (publication No. CN203031045U, published 2013, 07 month 03), the technology discloses the composite reamer, the front end of the reamer body is sequentially provided with a rough reaming cutting edge, a finish reaming cutting edge and a chamfering cutting edge, the diameter of the finish reaming cutting edge is 0.02-0.06mm larger than that of the rough reamer cutting edge, and the tail end of the reamer body is provided with knurling patterns. The structure of the machine tool overcomes the problems that in the prior art, when a machined workpiece is subjected to rough reaming, fine reaming and chamfering, a cutter needs to be replaced, the machining procedure is increased, and the machining time is wasted.
However, the guide blades are only arranged at the rough reamer edge of the front section of the cutter body, and the guide part is not arranged at the finish reamer edge of the rear section of the cutter body, so that the machining allowance of the rear section is large. If the front end deviates during machining, the rear section cannot be corrected again, thereby affecting the quality and accuracy of the surface of the hole wall of the workpiece.
Disclosure of Invention
The utility model aims to provide an: aiming at the defects of the prior art, the compound reamer is convenient to operate, high in stability, long in service life and capable of effectively improving the processing quality.
The technical purpose of the utility model is realized through the following technical scheme:
a compound reamer comprises a shank and a cutter head fixedly connected with the shank, wherein the cutter head is spirally provided with a plurality of cutting edges along the length direction, chip flutes are correspondingly arranged among the cutting edges, and the cutting edges comprise a first cutting edge which is arranged at the front end of the cutter head from front to back and is used for rough machining and a second cutting edge which is arranged at the rear end of the cutter head and is used for finish machining; a breaking groove is arranged between the first cutting edge and the second cutting edge; the first cutting edge comprises a rough reaming part with rough reaming taper and a first guide part for trimming guide; the second cutting edge comprises a fine reaming part with fine reaming taper and a second guide part for guiding; the diameter of the circumference formed by the rotation of the coarse hinge part is smaller than that of the circumference formed by the rotation of the fine hinge part.
The diameter of the circumference formed by the rotation of the coarse hinging part is 0.05-0.1 mm smaller than that of the circumference formed by the rotation of the fine hinging part.
The coarse hinge taper of the coarse hinge part is 4-6 degrees, and the length of the coarse hinge part is the same as that of the first guide part.
The length of the thick hinge part and the length of the first guide part are 7-9 mm.
The precision reaming taper of the precision reaming part is 1-3 degrees, and the length of the precision reaming part is 2-4 mm.
The helix angle of the cutting edge is 14-16 degrees.
The 45-degree chamfer at the front end of the cutter head is provided with a 10-degree back angle.
The tool bit is also provided with an inverted cone which can avoid scratching the internal control surface when the reamer is withdrawn.
The tapering of back taper is 2, and its length is 3mm.
The length of the cutting edge is more than or equal to 50mm.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a thick hinge part and finish reaming part are integrated on a cutter to be equipped with and divide the disconnected groove, divide the disconnected groove to establish in reamer work position length department, guarantee the effective length of cutting tapering and correction direction at the thick hinge position of front end. The compound reamer has the effects of coarse reaming and fine reaming, the roundness and the machining allowance of the bottom hole are corrected by the coarse reaming part, the fine reaming hole is well guided by the coarse reaming part during reaming, vibration of the cutter caused by overlong overhang is reduced, the fine reaming is always in a stable cutting state, and meanwhile, the second guide part is arranged at the fine reaming cutting edge of the rear section of the cutter body, so that the machining allowance of the rear section is moderate. If the front end deviates during processing, the rear section can be corrected again by the second guide. Thereby effectively improving the quality and the precision of the surface of the hole wall of the workpiece; meanwhile, the service life of the reamer is effectively prolonged.
2. The utility model discloses a circumference diameter D1 that thick hinge portion rotation formed is less than circumference diameter D1 that finish hinge portion rotation formed and is 0.05 ~ 0.1mm. The diameter of the circumference formed by the rotation of the first guide part corresponds to the diameter of the circumference formed by the rotation of the coarse hinge part, and the diameter of the circumference formed by the rotation of the second guide part corresponds to the diameter of the circumference formed by the rotation of the fine hinge part. The quality and the precision of the surface of the inner hole can be improved by micro-cutting during fine reaming.
3. The utility model discloses a thick hinge tapering of thick hinge portion is 4 ~ 6, and the length of thick hinge portion is the same with the length of first guide part. By adopting the technical measure, the first blade edge at the front end can carry out rough reaming and rough polishing on the inner hole.
4. The utility model discloses a finish reaming tapering of finish reaming portion is 1 ~ 3, just finish reaming portion length is 2 ~ 4mm. The technical measure is beneficial to guiding to ensure that the cutting is smoothly carried out when the precision reaming is carried out in the interrupted cutting, the cutting thickness is thinned, the interrupted cutting impact is reduced, and the surface quality of an inner hole is favorably improved.
5. The utility model discloses a compound reamer overall length is L, and its working position length (cutting edge) L1 is longer than or equal to 50mm, guarantees that rear end working position 30mm is long, adopts this technical measure to be favorable to the abundant interior hole surface of carrying on of cutting edge to be repaiied.
6. The utility model discloses a tapering of back taper is 2, and its length is 3mm, scratch hole surface when adopting this technical measure to be favorable to avoiding withdrawing the reamer.
7. The helix angle of the cutting edge of the utility model is 14-16 degrees. The technical measure can facilitate the reamer repairing by adopting oilstone to manually grind the front cutter face after being worn for a period of time.
8. The utility model discloses a 45 chamfers of tool bit front end are equipped with 10 relief angles. By adopting the technical measure, when the allowance is too large, the front end chamfer angle of 45 degrees can also be cut. Thereby facilitating the processing and effectively improving the working efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the present invention;
FIG. 3 is an axial cross-sectional view of a compound reamer;
FIG. 4 is a cross-sectional view E-E of FIG. 3;
reference numerals: 1, a knife handle; 2, a cutter head; 3-a first blade; 31-coarse hinge; 32 — a first guide; 4-a second blade; 41-fine hinge; 42-a second guide; 5-breaking the groove; 6-inverted cone; 7-45 degree chamfer.
Detailed Description
Specific embodiments of the present invention are described below with reference to the accompanying drawings:
example 1
As shown in fig. 1-4, the compound reamer comprises a holder 1 and a cutter head 2 fixedly connected with the holder 1, wherein 4 blades are spirally arranged on the cutter head 2 along the length direction, and chip flutes are correspondingly arranged between the blades. In actual use, as shown in fig. 2, the helix angle a1 of the helical cutting edge is 14 °. The technical measure can facilitate the reamer to be worn for a period of time after being used, and the front cutter face is manually ground by adopting the oilstone to repair the reamer.
The cutting edges comprise a first cutting edge 3 which is arranged at the front end of the cutter head 2 from front to back and is used for rough machining and a second cutting edge 4 which is arranged at the back end of the cutter head 2 and is used for fine machining; a breaking groove 5 is arranged between the first blade 3 and the second blade 4; the depth and width of the breaking groove 5 are suitable for grinding the finish reaming taper when the reamer is manufactured. For example, the width of the dividing groove 5 is 3mm, and the depth of the dividing groove 5 is 2mm.
The first cutting edge 3 includes a rough hinge 31 having a rough hinge taper and a first guide 32 for a truing guide; the second blade 4 comprises a fine reaming part 41 with fine reaming taper and a second guiding part 42 for guiding; the diameter of the circumference formed by the rotation of the coarse hinge 31 is smaller than that of the circumference formed by the rotation of the fine hinge 41. The fine reaming cutting edge of the rear section part of the cutter body is provided with a second guide part 42, so that the machining allowance of the rear section is moderate. If the front end deviates during use, the rear section can be corrected again by means of the second guide 42. Thereby effectively improving the quality and the precision of the surface of the hole wall of the workpiece.
As shown in fig. 2, the diameter D1 of the circumference formed by rotating the coarse hinge part 31 is 0.05mm smaller than the diameter D1 of the circumference formed by rotating the fine hinge part 41. Correspondingly, the diameter of the circumference formed by the rotation of the first guide part 32 corresponds to the diameter of the circumference formed by the rotation of the coarse hinge part 31, and the diameter of the circumference formed by the rotation of the second guide part 42 corresponds to the diameter of the circumference formed by the rotation of the fine hinge part 41. The quality and the precision of the surface of the inner hole can be improved by micro-cutting during the fine reaming.
The coarse hinge taper of the coarse hinge 31 is 4 °, and the length of the coarse hinge 31 is the same as that of the first guide 32. The length of the thick hinge part 31 and the length of the first guide part 32 are 7mm. By adopting the technical measure, the first cutting edge 3 at the front end can carry out rough reaming and rough polishing on the inner hole.
The finish reaming taper of the finish reaming part 41 is 1 degree, and the length of the finish reaming part 41 is 2mm. The technical measure is favorable for guiding during the intermittent cutting and fine reaming so that the cutting is smoothly carried out, the cutting thickness is thinned, the impact of the intermittent cutting is reduced, and the improvement of the surface quality of an inner hole is facilitated.
As shown in figures 1-3, the overall length of the compound reamer is L, the length (cutting edge) L1 of the working position of the compound reamer is longer than or equal to 50mm, and the working position at the rear end is ensured to be 30mm long.
As shown in figure 3, the taper c1 of the inverted cone 6 is 2 degrees, the length of the inverted cone is 3mm, and the technical measure is favorable for avoiding scratching the surface of the inner hole when the reamer is withdrawn.
As shown in fig. 4, the 45 ° chamfer 7 at the reamer tip is provided with a 10 ° relief angle a, and by this technical measure, the 45 ° chamfer 7 at the tip can also perform cutting when the margin is too large. Thereby facilitating the processing and effectively improving the working efficiency.
In actual use, the compound reamer integrates the rough reaming part 31 and the finish reaming part 41 on a cutter, and is provided with the breaking groove 5, and the breaking groove 5 is arranged at the length of the working part of the reamer, so that the cutting taper of the rough reaming part 31 at the front end and the effective length of the correction guide are ensured. The compound reamer has the effect of thick hinge and finish reaming concurrently, and the circularity and the machining allowance of bottom hole are revised in thick hinge portion 31 part to thick hinge portion 31 part has good guide effect to the finish reaming hole during the reaming, reduces the vibration that the cutter leads to because of the overhang overlength, makes the finish reaming be in stable cutting state all the time, and simultaneously, its finish reaming cutting edge department at the cutter body back end part sets up second guide part 42, thereby guarantees that the machining allowance of back end is moderate. If the front end deviates during machining, the rear section can be corrected again by means of the second guide 42. Thereby effectively improving the quality and the precision of the surface of the hole wall of the workpiece and effectively prolonging the service life of the reamer.
Example 2
As shown in fig. 1-4, the compound reamer comprises a holder 1 and a cutter head 2 fixedly connected with the holder 1, wherein 6 blades are spirally arranged on the cutter head 2 along the length direction, and chip flutes are correspondingly arranged between the blades. In actual use, the helix angle a1 of the helical cutting edge is 15 ° as shown in fig. 2. After the reamer is worn for a period of time, the front cutter face is manually ground by adopting oilstone to repair the reamer.
The cutting edges comprise a first cutting edge 3 which is arranged at the front end of the cutter head 2 from front to back and is used for rough machining and a second cutting edge 4 which is arranged at the back end of the cutter head 2 and is used for fine machining; a breaking groove 5 is arranged between the first blade 3 and the second blade 4; the depth and width of the breaking groove 5 are suitable for grinding the finish reaming taper when the reamer is manufactured. For example, the width of the dividing groove 5 is 4mm, and the depth of the dividing groove 5 is 3mm.
The first cutting edge 3 comprises a coarse reaming portion 31 with a coarse reaming taper and a first guide portion 32 for a finishing guide; the second blade 4 includes a finish-reaming portion 41 having a finish-reaming taper and a second guide portion 42 for guiding; the diameter of the circumference formed by the rotation of the coarse hinge part 31 is smaller than that of the circumference formed by the rotation of the fine hinge part 41. A second guide part 42 is arranged at the fine reaming cutting edge of the rear section part of the cutter body, so that the machining allowance of the rear section is moderate. If the front end deviates during machining, the rear section can be corrected again by means of the second guide 42. Thereby effectively improving the quality and precision of the surface of the hole wall of the workpiece; meanwhile, the service life of the reamer is effectively prolonged.
As shown in fig. 2, the diameter D1 of the circumference formed by rotating the coarse hinge 31 is 0.8mm smaller than the diameter D1 of the circumference formed by rotating the fine hinge 41. Correspondingly, the diameter of the circumference formed by rotating the first guide part 32 corresponds to the diameter of the circumference formed by rotating the coarse hinge part 31, and the diameter of the circumference formed by rotating the second guide part 42 corresponds to the diameter of the circumference formed by rotating the fine hinge part 41. The quality and the precision of the surface of the inner hole can be improved by micro-cutting during the fine reaming.
The coarse hinge taper of the coarse hinge 31 is 5 °, and the length of the coarse hinge 31 is the same as that of the first guide part 32. The length of the thick hinge part 31 and the length of the first guide part 32 are 8mm.
The finish reaming taper of the finish reaming part 41 is 2 degrees, and the length of the finish reaming part 41 is 3mm. The technical measure is beneficial to guiding to ensure that the cutting is smoothly carried out when the precision reaming is carried out in the interrupted cutting, the cutting thickness is thinned, the interrupted cutting impact is reduced, and the surface quality of an inner hole is favorably improved.
As shown in figures 1-3, the overall length of the compound reamer is L, the length (cutting edge) L1 of the working position of the compound reamer is longer than or equal to 50mm, the working position at the rear end is ensured to be 30mm long, and the inner hole surface can be fully polished by the aid of the cutting edge.
As shown in figure 3, the taper c1 of the inverted cone 6 is 2 degrees, the length of the inverted cone is 3mm, and the adoption of the inverted cone is beneficial to avoiding scratching the surface of an inner hole when the reamer is withdrawn.
As shown in fig. 4, the 45 ° chamfer 7 at the reamer tip is provided with a 10 ° relief angle a, and if the margin is too large, the 45 ° chamfer 7 at the tip can also be cut. Thereby facilitating the processing and effectively improving the working efficiency.
Example 3
As shown in fig. 1-4, the compound reamer comprises a shank 1 and a cutter head 2 fixedly connected with the shank 1, wherein 8 cutting edges are spirally arranged on the cutter head 2 along the length direction, and chip flutes are correspondingly arranged between the cutting edges. In actual use, the helix angle a1 of the helical cutting edge is 16 ° as shown in fig. 2. After the reamer is worn for a period of time, the reamer is repaired by manually grinding the front cutter face with oilstone.
The cutting edges comprise a first cutting edge 3 which is arranged at the front end of the cutter head 2 from front to back and is used for rough machining and a second cutting edge 4 which is arranged at the back end of the cutter head 2 and is used for fine machining; a breaking groove 5 is arranged between the first blade 3 and the second blade 4; the depth and the width of the fracture splitting groove 5 are suitable for grinding the finish reaming taper when the reamer is manufactured. For example, the width of the dividing groove 5 is 5mm, and the depth of the dividing groove 5 is 4mm.
The first cutting edge 3 includes a rough hinge 31 having a rough hinge taper and a first guide 32 for a truing guide; the second blade 4 includes a finish-reaming portion 41 having a finish-reaming taper and a second guide portion 42 for guiding; the diameter of the circumference formed by the rotation of the coarse hinge part 31 is smaller than that of the circumference formed by the rotation of the fine hinge part 41. A second guide part 42 is arranged at the fine reaming cutting edge of the rear section part of the cutter body, so that the machining allowance of the rear section is moderate. If the front end deviates during machining, the rear section can be corrected again by means of the second guide 42. Thereby effectively improving the quality and the precision of the surface of the hole wall of the workpiece; meanwhile, the service life of the reamer is effectively prolonged.
As shown in fig. 2, the diameter D1 of the circumference formed by rotating the coarse hinge part 31 is 0.1mm smaller than the diameter D1 of the circumference formed by rotating the fine hinge part 41. Correspondingly, the diameter of the circumference formed by rotating the first guide part 32 corresponds to the diameter of the circumference formed by rotating the coarse hinge part 31, and the diameter of the circumference formed by rotating the second guide part 42 corresponds to the diameter of the circumference formed by rotating the fine hinge part 41. The quality and the precision of the surface of the inner hole can be improved by micro-cutting during the fine reaming.
The coarse hinge taper of the coarse hinge 31 is 6 °, and the length of the coarse hinge 31 is the same as that of the first guide 32. The length of the thick hinge part 31 and the length of the first guide part 32 are 9mm.
The finish reaming taper of the finish reaming part 41 is 3 degrees, and the length of the finish reaming part 41 is 4mm. The technical measure is beneficial to guiding to ensure that the cutting is smoothly carried out when the precision reaming is carried out in the interrupted cutting, the cutting thickness is thinned, the interrupted cutting impact is reduced, and the surface quality of an inner hole is favorably improved.
As shown in figures 1-3, the overall length of the compound reamer is L, the length (cutting edge) L1 of the working position of the compound reamer is longer than or equal to 50mm, the working position at the rear end is ensured to be 30mm long, and the inner hole surface can be fully polished by the aid of the cutting edge.
As shown in figure 3, the taper c1 of the inverted cone 6 is 2 degrees, the length of the inverted cone is 3mm, and the adoption of the inverted cone is beneficial to avoiding scratching the surface of an inner hole when the reamer is withdrawn.
As shown in fig. 4, the 45 ° chamfer 7 at the reamer tip is provided with a back angle a of 10 °, and if the margin is too large, the 45 ° chamfer 7 at the tip can also be cut. Thereby facilitating the processing and effectively improving the working efficiency.
The technical solutions of the above embodiments are only used for illustrating the present invention, and not for limiting the same. Although the present invention has been described in detail with reference to the technical solutions of the foregoing embodiments, those skilled in the art should understand that: the technical scheme can be modified, or part of technical characteristics can be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its specific aspects.
Claims (10)
1. The utility model provides a compound reamer, include the handle of a knife and with handle of a knife fixed connection's tool bit, the tool bit has arranged a plurality of cutting edges with the heliciform along length direction, just correspond between the cutting edge and be provided with chip groove, its characterized in that: the cutting edges comprise a first cutting edge which is arranged at the front end of the cutter head from front to back and is used for rough machining and a second cutting edge which is arranged at the back end of the cutter head and is used for finish machining; a breaking groove is arranged between the first cutting edge and the second cutting edge; the first cutting edge comprises a rough reaming part with rough reaming taper and a first guide part for trimming guide; the second cutting edge comprises a finish reaming part with finish reaming taper and a second guide part for guiding; the diameter of the circumference formed by the rotation of the coarse hinging part is smaller than that of the circumference formed by the rotation of the fine hinging part.
2. The compound reamer of claim 1 wherein: the diameter of the circumference formed by the rotation of the coarse hinging part is 0.05-0.1 mm smaller than that of the circumference formed by the rotation of the fine hinging part.
3. The compound reamer of claim 1 wherein: the coarse hinge taper of the coarse hinge part is 4-6 degrees, and the length of the coarse hinge part is the same as that of the first guide part.
4. The compound reamer of claim 3 wherein: the length of the thick hinge part and the length of the first guide part are 7-9 mm.
5. The compound reamer of claim 1 wherein: the precision reaming taper of the precision reaming part is 1-3 degrees, and the length of the precision reaming part is 2-4 mm.
6. The compound reamer of claim 1, wherein: the helix angle of the cutting edge is 14-16 degrees.
7. The compound reamer of claim 1 wherein: the 45-degree chamfer at the front end of the cutter head is provided with a 10-degree back angle.
8. The compound reamer of claim 1, wherein: the tool bit is also provided with an inverted cone which can avoid scratching the internal control surface when the reamer is withdrawn.
9. The compound reamer of claim 8, wherein: the tapering of back taper is 2, and its length is 3mm.
10. The compound reamer of claim 1, wherein: the length of the cutting edge is more than or equal to 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123118098.5U CN217618163U (en) | 2021-12-13 | 2021-12-13 | Compound reamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123118098.5U CN217618163U (en) | 2021-12-13 | 2021-12-13 | Compound reamer |
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| Publication Number | Publication Date |
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| CN217618163U true CN217618163U (en) | 2022-10-21 |
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| CN202123118098.5U Active CN217618163U (en) | 2021-12-13 | 2021-12-13 | Compound reamer |
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| CN (1) | CN217618163U (en) |
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- 2021-12-13 CN CN202123118098.5U patent/CN217618163U/en active Active
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