CN111922448A - Rough and fine integrated hard alloy dry cutting hob - Google Patents
Rough and fine integrated hard alloy dry cutting hob Download PDFInfo
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- CN111922448A CN111922448A CN202010739197.6A CN202010739197A CN111922448A CN 111922448 A CN111922448 A CN 111922448A CN 202010739197 A CN202010739197 A CN 202010739197A CN 111922448 A CN111922448 A CN 111922448A
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- machining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/12—Milling tools
- B23F21/16—Hobs
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Abstract
A rough and fine integrated hard alloy dry cutting hob belongs to the technical field of gear machining cutters. The invention relates to a rough and fine integrated hard alloy dry cutting hob which comprises a hob main body, a rough machining hob group and a fine machining hob group, wherein a hob positioning hole is formed in the center of the hob main body along the axial direction; the hobbing cutter main body, the rough machining hobbing cutter group and the finish machining hobbing cutter group are all made of hard alloy, key grooves in key connection with a main shaft of a hobbing machine tool are formed in the inner walls of positioning holes of the hobbing cutter, the rough machining hobbing cutter group and the finish machining hobbing cutter group are detachably and fixedly connected to the hobbing cutter main body respectively, a plurality of V-shaped rough machining hobbing cutter chip-containing grooves are uniformly formed in the outer circumferential surface of the rough machining hobbing cutter, and a plurality of V-shaped finish machining hobbing cutter chip-containing grooves are uniformly formed in the outer circumferential; the front cutter face of each rough-machining hobbing cutter piece in the rough-machining hobbing cutter group is provided with a rough-machining front cutting edge and a rough-machining side cutting edge; and the front cutter face of each finish machining hobbing cutter piece in the finish machining hobbing cutter group is provided with a finish machining front cutting edge and a finish machining side cutting edge. The invention is used for rough and finish machining of the gear.
Description
Technical Field
The invention belongs to the technical field of gear machining cutters, and particularly relates to a rough and fine integrated hard alloy dry cutting hob.
Background
With the rapid development of economy in China, the technologies of automobiles, aviation, machine tools and living appliances are greatly improved, and the demand for gears is continuously increased, so that an excellent gear machining process is particularly important. Hobbing is a process produced by the development of gears for many years and is a current mainstream gear processing method, however, the traditional wet cutting hobbing can not meet the requirements of enterprises in terms of current high-precision gears, high labor cost, green environmental protection requirements and the like. The conventional gear hobbing is mainly dry gear hobbing, generally rough machining or semi-finish machining, and honing is still required after gear hobbing to ensure that the gear precision reaches the required standard, so that the gear machining process has more steps, the gear machining time is increased, the gear machining efficiency is reduced, and the gear machining cost is increased. At present, the hob is generally made of high-speed steel, the cutting speed of the hob is lower than that of hard alloy, the influence on the processing efficiency is large, meanwhile, when the whole hob is ground, relatively large internal stress can be generated, and when the hob is damaged or cannot be ground again, the cost for replacing the hob is high.
Disclosure of Invention
The invention aims to provide a rough and fine integrated hard alloy dry cutting hob aiming at the problems of low machining precision, high hob changing cost, low cutting efficiency and the like in the existing hobbing process.
According to the rough and fine integrated hard alloy dry cutting hob, the hob is made of hard alloy, and the double-precision hob group (one group of rough machining and one group of fine machining) is detachably fixed, so that a hobbing processing technology capable of performing rough machining and fine machining is provided for gear cutting, the hobbing processing precision is improved, the gear processing flow is reduced, the hob changing cost is reduced, the cutting speed is increased, and the gear processing efficiency of an enterprise is improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a rough and fine integrated hard alloy dry cutting hob comprises a hob body, a rough machining hob group and a fine machining hob group, wherein a hob positioning hole is formed in the center of the hob body in the axial direction; the hobbing cutter comprises a hobbing cutter body, a rough machining hobbing cutter set and a finish machining hobbing cutter set, wherein the hobbing cutter body, the rough machining hobbing cutter set and the finish machining hobbing cutter set are all made of hard alloy, key grooves connected with a main shaft key of a hobbing machine tool are formed in the inner wall of a positioning hole of the hobbing cutter, the rough machining hobbing cutter set and the finish machining hobbing cutter set are detachably and fixedly connected to the hobbing cutter body respectively, a plurality of V-shaped rough machining hobbing cutter chip-containing grooves are uniformly distributed in the outer circumferential surface of the rough machining hobbing cutter, and a plurality of V-shaped finish; the front cutter face of each rough machining hobbing cutter piece in the rough machining hobbing cutter group is provided with a rough machining front cutting edge and a rough machining side cutting edge; and the front cutter face of each finish machining hobbing cutter piece in the finish machining hobbing cutter group is provided with a finish machining front cutting edge and a finish machining side cutting edge.
Compared with the prior art, the invention has the beneficial effects that:
(1) the hobbing cutter main part can be dismantled and be fixed with two sets of hobbing cutters, and a set of be rough machining hobbing cutter group, and another group is finish machining hobbing cutter group, and finish machining hobbing cutter group has higher machining precision, carries out general precision gear machining, and reducible or replace honing technology reduces gear machining time, reduces gear machining expense, improves gear machining efficiency.
(2) According to the rough and fine integrated hard alloy dry cutting hob disclosed by the invention, the hob body is provided with the positioning hole and the key groove, and a main shaft of a hob machine tool can transmit torque to the hob body through the key to drive the hob to move; meanwhile, when the hob is ground, the internal stress of the hob can be reduced, the grinding quality of the hob is improved, and when the hob is damaged or cannot be ground again, the hob does not need to be replaced integrally, so that the material waste is reduced, and the processing cost is reduced.
(3) The hob material is hard alloy which is powder of micron-order refractory high-hardness metal carbide, compared with high-speed steel, the hard alloy has excellent red hardness, the processed gear materials such as 20CrMnTi, 16CrMn5 and the like have higher hardness and wear resistance, the cutting speed is increased more than that of the high-speed steel, high-speed cutting can be realized, and the cutting efficiency is improved.
(4) The rough machining hob group is provided with a plurality of rough machining fixing bolt holes along the radial direction, the finish machining hob group is provided with a plurality of finish machining fixing bolt holes along the radial direction, the outer wall of the hob main body is provided with a plurality of threaded holes corresponding to the plurality of rough machining fixing bolt holes and the plurality of finish machining fixing bolt holes respectively, the rough machining hob group and the finish machining hob group are detachably and fixedly connected with the hob main body through a plurality of bolts respectively, the effect of fixing the hob and transmitting torque is achieved, meanwhile, a user can self-define the position of the hob according to the required cutter length and a high-efficiency tool fleeing method, the service life of the cutter can be prolonged, the consistency of workpieces is improved.
(5) The rough machining hob group and the finish machining hob group are respectively provided with a V-shaped rough machining hob chip groove and a V-shaped finish machining hob chip groove, the opening angles of the V-shaped rough machining hob chip groove and the V-shaped finish machining hob chip groove are 15 degrees, and the calculation formula of the depth is as follows:
the V-shaped rough machining hob chip pocket and the V-shaped finish machining hob chip pocket have the structural characteristics of large width and deep groove, the inflow of compressed air can be increased, the cutting heat diffusion speed is further improved, a chip discharge channel can be enlarged, scratches on the surface of the hob caused by chips are reduced, the service life of the hob is prolonged, rough machining fixing bolt holes and finish machining fixing bolt holes are respectively formed in the bottom of the V-shaped rough machining hob chip pocket and the bottom of the V-shaped finish machining hob chip pocket, and effective connection between a rough machining hob group and a finish machining hob group and the hob body can be achieved.
(6) The front cutter face of the rough machining hob in the rough machining hob group is provided with a rough machining front cutting edge and a rough machining side cutting edge; the front cutter face of a finish machining hob in the finish machining hob group is provided with a finish machining front cutting edge and a finish machining side cutting edge, and the rough machining hob cutting edge has the characteristics of high tooth height and narrow tooth side and mainly cuts the tooth root; the cutting edge of the finish machining hob embodies the characteristics of low tooth height and wide tooth side, and the high-precision machining is performed on the tooth side; the rough and fine integrated hard alloy dry cutting hob can reduce the cutting load of the tool tip, reduce the abrasion near the tool tip of the rear tool face and prolong the service life of the hob on the basis of improving the processing precision.
(7) The hob main body can be designed with threaded holes with different densities or different distances according to different cutter precision or cutter types so as to meet the requirements on machining precision, strength and the like, improve the machining efficiency of the machine tool, shorten the machining time and improve the enterprise benefits.
Drawings
FIG. 1 is a front view of a rough and fine integrated cemented carbide dry cutting hob of the present invention;
FIG. 2 is a cross-sectional view of a finish attachment bolt hole;
FIG. 3 is an enlarged view of a portion of the finishing hob in FIG. 1 at A;
FIG. 4 is a cross-sectional view of a rough anchor bolt hole;
fig. 5 is a partially enlarged view of the roughing hob in fig. 1 at B.
The names and reference numbers of the components referred to in the above figures are as follows:
the hob head comprises a hob body 1, a finish machining hob group 2, a rough machining hob group 3, a hob positioning hole 4, a key groove 5, a finish machining fixing bolt hole 6, a V-shaped finish machining hob chip pocket 7, a finish machining hob blade 8, a rough machining fixing bolt hole 9, a V-shaped rough machining hob chip pocket 10, a rough machining hob blade 11, a rough machining side cutting edge 12, a rough machining front cutting edge 13, a finish machining side cutting edge 14 and a finish machining front cutting edge 15.
The present invention will be described in further detail below with reference to the accompanying drawings.
Detailed Description
The first embodiment is as follows: as shown in fig. 1-5, the present embodiment discloses a rough and fine integrated cemented carbide dry cutting hob, which includes a hob body 1, a rough machining hob group 3 and a fine machining hob group 2, wherein a hob positioning hole 4 is axially formed in the center of the hob body 1; the hob main body 1, the rough machining hob group 3 and the finish machining hob group 2 are made of hard alloy, a key groove 5 in key connection with a main shaft of a hobbing machine tool is formed in the inner wall of a hob positioning hole 4, the rough machining hob group 3 and the finish machining hob group 2 (the finish machining hob group 2 is applied, a honing process can be reduced or replaced, gear machining time is reduced, gear machining cost is reduced, and gear machining efficiency is improved) are respectively and fixedly connected to the hob main body 1 through bolts in a detachable mode, a plurality of V-shaped rough machining hob chip grooves 10 are uniformly formed in the outer circular surface of the rough machining hob group 3, a plurality of V-shaped finish machining hob chip grooves 7 are uniformly formed in the outer circular surface of the finish machining hob group 2 (the inflow of compressed air can be increased, the cutting heat diffusion speed is further improved, chip discharge channels can be enlarged, and further scratches on the surface of the hob are reduced, prolonging the life of the tool); the front cutter face of each rough-machining hobbing cutter 11 in the rough-machining hobbing cutter group 3 is provided with a rough-machining front cutting edge 13 and a rough-machining side cutting edge 12; the front cutter face of each finish machining hob blade 8 in the finish machining hob group 2 is provided with a finish machining front cutting edge 15 and a finish machining side cutting edge 14 (the cutting load of a hob tip can be reduced, the abrasion near the hob tip of a rear cutter face is reduced, and the service life of the hob is prolonged).
The second embodiment is as follows: as shown in fig. 1, 2 and 4, in the present embodiment, a first specific embodiment is further described, a plurality of rough-machining fixing bolt holes 9 are uniformly distributed on the rough-machining hob group 3 in the radial direction, and the plurality of rough-machining fixing bolt holes 9 are all arranged at the bottom of corresponding V-shaped rough-machining hob chip flutes 10; the finish machining hob group 2 is uniformly provided with a plurality of finish machining fixing bolt holes 6 along the radial direction, the finish machining fixing bolt holes 6 are all arranged at the bottom of corresponding V-shaped finish machining hob chip grooves 7 (the functions of fixing the hob and transmitting torque are achieved, meanwhile, a user can self-define the position of the hob according to the required length of the hob and an efficient tool fleeing method, the service life of the hob can be prolonged, the consistency of workpieces is improved, and the like, the hob group fixing bolt holes are designed, the effective connection between the hob group and the hob body can be achieved, the rough machining hob group 3 is uniformly provided with a plurality of rough machining fixing bolt holes 9 along the radial direction, the finish machining hob group 2 is uniformly provided with a plurality of finish machining fixing bolt holes 6 along the radial direction, the effective connection between the rough machining hob group 3 and the finish machining hob group 2 and the hob body 1 can be achieved), and the outer wall of the hob body 1 corresponds to the plurality of rough machining fixing bolt holes 9 A plurality of threaded holes are respectively arranged; rough machining hobbing cutter group 3 can dismantle fixed connection through penetrating a plurality of rough machining fixing bolt holes 9 and close the bolt of being connected with a plurality of screw holes soon with hobbing cutter main part 1, and finish machining hobbing cutter group 2 can dismantle fixed connection through penetrating a plurality of finish machining fixing bolt holes 6 and close the bolt of being connected with a plurality of screw holes soon with hobbing cutter main part 1.
The third concrete implementation mode: as shown in fig. 2 and 4, in the present embodiment, the first or second embodiment is further explained, in which the opening angles of the V-shaped rough-machining hob chip pockets 10 and the V-shaped finish-machining hob chip pockets 7 are both 14 to 16 °, and the depth calculation formulas of the V-shaped rough-machining hob chip pockets 10 and the V-shaped finish-machining hob chip pockets 7 are:
wherein: h is the depth of a flute 10 of the V-shaped rough machining hob or the depth of a flute 7 of the V-shaped finish machining hob, H0Is full tooth height, k is the back of shovel, k1For the second relieving amount, the chip pocket of the V-shaped rough machining hob and the chip pocket of the V-shaped finish machining hob have the structural characteristics of large width and deep groove, the inflow of compressed air can be increased, the cutting heat diffusion speed is further improved, a chip discharge channel can be enlarged, the surface scratch of chips on the hob is reduced, the service life of the hob is prolonged, the rough machining fixing bolt holes 9 and the finish machining fixing bolt holes 6 are respectively arranged at the bottoms of the chip pocket 10 of the V-shaped rough machining hob and the chip pocket 7 of the V-shaped finish machining hob, and the effective connection between the rough machining hob group 3 and the finish machining hob group 2 and the hob body 1 can be realized.
Claims (3)
1. A rough and fine integrated hard alloy dry cutting hob comprises a hob main body (1), a rough machining hob group (3) and a fine machining hob group (2), wherein a hob positioning hole (4) is formed in the center of the hob main body (1) in the axial direction; the method is characterized in that: the hobbing cutter comprises a hobbing cutter body (1), a rough machining hobbing cutter group (3) and a finish machining hobbing cutter group (2), wherein the hobbing cutter body (1), the rough machining hobbing cutter group (3) and the finish machining hobbing cutter group (2) are made of hard alloy, a key groove (5) connected with a main shaft key of a hobbing machine tool is formed in the inner wall of a hobbing cutter positioning hole (4), the rough machining hobbing cutter group (3) and the finish machining hobbing cutter group (2) are detachably and fixedly connected to the hobbing cutter body (1) respectively, a plurality of V-shaped rough machining hobbing cutter chip grooves (10) are uniformly distributed on the outer circular surface of the rough machining hobbing cutter group (3), and a plurality of V-shaped finish machining hobbing; the front cutter face of each rough machining hobbing cutter (11) in the rough machining hobbing cutter group (3) is provided with a rough machining front cutting edge (13) and a rough machining side cutting edge (12); and the front cutter face of each finish machining hobbing cutter (8) in the finish machining hobbing cutter group (2) is provided with a finish machining front cutting edge (15) and a finish machining side cutting edge (14).
2. The rough and fine integrated hard alloy dry cutting hob according to claim 1, characterized in that: a plurality of rough machining fixing bolt holes (9) are uniformly distributed in the rough machining hobbing cutter group (3) along the radial direction, and the rough machining fixing bolt holes (9) are all arranged at the bottoms of corresponding V-shaped rough machining hobbing cutter chip grooves (10); a plurality of finish machining fixing bolt holes (6) are uniformly distributed in the finishing hob group (2) along the radial direction, the finish machining fixing bolt holes (6) are all arranged at the bottoms of the corresponding V-shaped finish machining hob chip grooves (7), and a plurality of threaded holes are respectively formed in the outer wall of the hob body (1) at positions corresponding to the plurality of rough machining fixing bolt holes (9) and the plurality of finish machining fixing bolt holes (6); rough machining hobbing cutter group (3) can dismantle fixed connection through penetrating a plurality of rough machining fixing bolt holes (9) and close the bolt of being connected soon with a plurality of screw holes with hobbing cutter main part (1), and finish machining hobbing cutter group (2) can dismantle fixed connection through penetrating a plurality of finish machining fixing bolt holes (6) and close the bolt of being connected soon with a plurality of screw holes with hobbing cutter main part (1).
3. The rough and fine integrated cemented carbide dry cutting hob according to claim 1 or 2, characterized in that: the opening angles of the V-shaped rough machining hob chip grooves (10) and the V-shaped finish machining hob chip grooves (7) are 14-16 degrees, and the depth calculation formulas of the V-shaped rough machining hob chip grooves (10) and the V-shaped finish machining hob chip grooves (7) are as follows:
wherein: h is the depth of a flute (10) of the V-shaped rough machining hob or the depth of a flute (7) of the V-shaped finish machining hob, H0Is full tooth height, k is the back of shovel, k1The second amount of spading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010739197.6A CN111922448A (en) | 2020-07-28 | 2020-07-28 | Rough and fine integrated hard alloy dry cutting hob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010739197.6A CN111922448A (en) | 2020-07-28 | 2020-07-28 | Rough and fine integrated hard alloy dry cutting hob |
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| Publication Number | Publication Date |
|---|---|
| CN111922448A true CN111922448A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010739197.6A Pending CN111922448A (en) | 2020-07-28 | 2020-07-28 | Rough and fine integrated hard alloy dry cutting hob |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210753A (en) * | 2021-05-17 | 2021-08-06 | 浙江上优刀具有限公司 | Straight flute hobbing cutter that can clear up chip groove automatically |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3535079A1 (en) * | 1985-10-02 | 1987-04-09 | Bernhard Ranker | High-duty hobbing cutter |
| JPH01222816A (en) * | 1988-02-29 | 1989-09-06 | Komatsu Ltd | Hob for machining internal gear |
| CN102114557A (en) * | 2010-04-09 | 2011-07-06 | 叶志君 | Gear hob |
| CN201950298U (en) * | 2011-04-11 | 2011-08-31 | 南京金腾重载齿轮箱有限公司 | Replaceable carbide blade hob |
| CN103706889A (en) * | 2013-12-31 | 2014-04-09 | 苏州亚太金属有限公司 | Rough and finish machining integrated hobbing cutter |
| CN206747725U (en) * | 2017-05-15 | 2017-12-15 | 浙江上优刀具有限公司 | A kind of alloy gear hob |
-
2020
- 2020-07-28 CN CN202010739197.6A patent/CN111922448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3535079A1 (en) * | 1985-10-02 | 1987-04-09 | Bernhard Ranker | High-duty hobbing cutter |
| JPH01222816A (en) * | 1988-02-29 | 1989-09-06 | Komatsu Ltd | Hob for machining internal gear |
| CN102114557A (en) * | 2010-04-09 | 2011-07-06 | 叶志君 | Gear hob |
| CN201950298U (en) * | 2011-04-11 | 2011-08-31 | 南京金腾重载齿轮箱有限公司 | Replaceable carbide blade hob |
| CN103706889A (en) * | 2013-12-31 | 2014-04-09 | 苏州亚太金属有限公司 | Rough and finish machining integrated hobbing cutter |
| CN206747725U (en) * | 2017-05-15 | 2017-12-15 | 浙江上优刀具有限公司 | A kind of alloy gear hob |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210753A (en) * | 2021-05-17 | 2021-08-06 | 浙江上优刀具有限公司 | Straight flute hobbing cutter that can clear up chip groove automatically |
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Application publication date: 20201113 |
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