CN108296572B - Bevel gear generating method milling head - Google Patents
Bevel gear generating method milling head Download PDFInfo
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- CN108296572B CN108296572B CN201710027766.2A CN201710027766A CN108296572B CN 108296572 B CN108296572 B CN 108296572B CN 201710027766 A CN201710027766 A CN 201710027766A CN 108296572 B CN108296572 B CN 108296572B
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- supporting plate
- gear
- motor
- cradle
- cutter head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/20—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling
- B23F5/24—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making bevel gears
Abstract
The invention relates to the technical field of gear processing equipment, in particular to a bevel gear generating method milling head which comprises a cutter head, a lower supporting plate, a limiting adjusting block, a middle supporting plate, an upper supporting plate, a sector gear, a supporting bedplate, a cradle bearing seat, a servo motor, a motor gear, an electric push rod, a slide block pair A, an adjusting screw rod, a hand wheel, a slide block pair B and a driving motor. The left side of the bottom surface of the lower supporting plate is provided with a cutter disc, the right side of the bottom surface of the lower supporting plate is provided with a driving motor, and the driving motor is connected with the cutter disc through a driving belt and drives the cutter disc to perform continuous rotation gear cutting; the cutter head and the driving motor form a gear cutting assembly; the generating milling head is designed by applying the formation principle of the gear profile, can be arranged on tooth damage production equipment, and is linked with a workpiece spindle of the equipment to form a bevel gear blank and tooth profile processing integrated machine, so that the difficult problem of pinion clamping and secondary clamping errors are avoided, and the working efficiency is improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of gear machining equipment, in particular to a bevel gear generating method milling head.
[ background of the invention ]
The micro-modulus bevel gear transmission is applied to medical dental surgery. The product requires more than 20 thousands of revolutions and has higher indexes of noise, vibration, temperature rise and service life, so that the bevel gear is required to have higher meshing performance and the tooth profile is very important. The current profiling processes do not meet the above requirements. The consistency of the product is also poor because the cutter is worn and is not easy to grind.
[ summary of the invention ]
The invention aims to provide a bevel gear generating milling head aiming at the defects and shortcomings of the prior art, the bevel gear generating milling head is designed by using the forming principle of gear tooth shapes, can be installed on tooth-defect production equipment, and is linked with a workpiece spindle of the equipment to form a bevel gear blank and tooth shape processing integrated machine, so that the difficult problem of pinion clamping and secondary clamping errors are avoided, and meanwhile, the working efficiency is improved.
The invention relates to a bevel gear generating method milling head which comprises a cutter head, a lower supporting plate, a limiting adjusting block, a middle supporting plate, an upper supporting plate, a sector gear, a supporting platen, a cradle bearing seat, a servo motor, a motor gear, an electric push rod, a slide block pair A, an adjusting screw rod, a hand wheel, a slide block pair B and a driving motor, wherein the cutter head is arranged on the left side of the bottom surface of the lower supporting plate, the driving motor is arranged on the right side of the bottom surface of the lower supporting plate, and the driving motor is connected with the cutter head through a transmission belt and drives the cutter head to perform uninterrupted rotation gear cutting; the cutter head and the driving motor form a gear cutting assembly;
a sliding block pair B is arranged on the lower supporting plate, a middle supporting plate is arranged on the sliding block pair B, an adjusting screw rod is arranged between the lower supporting plate and the middle supporting plate, the adjusting screw rod is inserted into the sliding block pair B, and a hand wheel is arranged at the outer side end of the adjusting screw rod;
the front surface of the middle supporting plate is provided with a plurality of limiting holes, limiting adjusting blocks are arranged on the limiting holes, a sliding block pair A is arranged on the middle supporting plate, and an electric push rod is arranged on the sliding block pair A; an upper supporting plate is arranged on the sliding block pair A;
a sector gear is arranged on the left side of the upper supporting plate, a motor gear is arranged on the right side of the upper supporting plate, and the motor gear is meshed with the sector gear; a support platen is arranged above the motor gear, a cradle bearing seat is arranged on the left side of the support platen, and the cradle bearing seat is connected with the sector gear through a cradle shaft; a servo motor is arranged on the right side of the supporting bedplate; the servo motor is connected with the motor gear through a crankshaft of the servo motor and drives the motor gear to rotate, the motor gear drives the sector gear meshed with the motor gear to rotate, and the sector gear rotates around the cradle shaft; the servo motor, the cradle bearing seat, the sector gear, the motor gear and the upper supporting plate form a cradle assembly; the cradle assembly is mounted on a fixed support of the lathe.
Further, the cutter head adjusts the eccentric amount through a fine adjustment device; the fine setting device comprises spacing regulating block, electric putter, linear guide, slider are vice, and fine setting device installs between layer board and well layer board, and the layer board bottom surface has the inclination to be 100: 1, the upper end of a limit adjusting block is inserted into a slot, the limit adjusting block is arranged at different positions in the slot, gaps at two sides of the slot are different, and an electric push rod 11 arranged on a middle supporting plate is utilized to push or pull the upper supporting plate to eliminate gaps in the slot, so that a left or right offset distance between the center of a micro cutter head and the center of a cradle shaft is obtained; when the limiting adjusting block is pushed to the bottom leftwards, the adjusting gap is 0.00 mm, namely the center of the cutter head is superposed with the center of the cradle; when the workpiece is pushed to the bottom rightwards, the gap is adjusted to be +/-1.00 mm; the total regulating quantity is 0 to plus or minus 1.00 mm.
Furthermore, the sector gear is a double-layer gear, the upper layer gear is sleeved on the cradle shaft in an empty mode, and a strong spring is arranged between the two layers, so that the double wheels are staggered, and the gear backlash during gear transmission is eliminated.
After adopting the structure, the invention has the beneficial effects that: the bevel gear generating milling head provided by the invention is designed by using the formation principle of gear tooth shape, can be installed on tooth damage production equipment, and is linked with a workpiece spindle of the equipment to form a bevel gear blank and tooth shape processing integrated machine, so that the difficult problem of pinion clamping and secondary clamping errors are avoided, the working efficiency is improved, a linear cutting edge cutter head can be used, the convenience is brought to self-grinding of a cutter, and the use cost of the cutter is reduced.
[ description of the drawings ]
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, and are not to be considered limiting of the invention, in which:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a perspective view of the present invention in a rear view direction.
Description of reference numerals:
1. a cutter head; 2. a lower supporting plate; 3. a limiting adjusting block; 4. a middle supporting plate; 5. an upper supporting plate; 6. a sector gear; 7. a support platen; 8. a cradle bearing seat; 9. a servo motor; 10. a motor gear; 11. an electric push rod; 12. a slider pair A; 13. a hand wheel; 14. a slide block pair B; 15. a drive motor; 16. adjusting the screw rod; 17. a drive belt.
[ detailed description ] embodiments
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1 and 2, the bevel gear generating milling head according to the present embodiment includes a cutter head 1, a lower supporting plate 2, a limiting adjusting block 3, a middle supporting plate 4, an upper supporting plate 5, a sector gear 6, a supporting platen 7, a cradle bearing seat 8, a servo motor 9, a motor gear 10, an electric push rod 11, a slider pair a12, an adjusting screw rod 16, a hand wheel 13, a slider pair B14, and a driving motor 15, wherein the cutter head 1 is disposed on the left side of the bottom surface of the lower supporting plate 2, the driving motor 15 is disposed on the right side of the bottom surface of the lower supporting plate 2, and the driving motor 15 is connected to the cutter head 1 through a transmission belt 17 to drive the cutter head to perform uninterrupted rotation and gear cutting; the cutter head 1 and the driving motor 15 form a gear cutting assembly;
a sliding block pair B14 is arranged on the lower supporting plate 2, a middle supporting plate 4 is arranged on a sliding block pair B14, an adjusting screw rod 16 is arranged between the lower supporting plate 2 and the middle supporting plate 4, the adjusting screw rod 16 is inserted into the sliding block pair B14, and a hand wheel 13 is arranged at the outer end of the adjusting screw rod;
a plurality of fixing holes are formed in the front surface of the middle supporting plate 4, a limiting adjusting block 3 is arranged on each limiting hole, a sliding block pair A12 is arranged on the middle supporting plate 4, and an electric push rod 11 is arranged on the sliding block pair A12; an upper supporting plate 5 is arranged on the sliding block pair A12;
a sector gear 6 is arranged on the left side of the upper supporting plate 5, a motor gear 10 is arranged on the right side of the upper supporting plate 5, and the motor gear 10 is meshed with the sector gear 6; a support platen 7 is arranged above the motor gear 10, a cradle bearing seat 8 is arranged on the left side of the support platen 7, and the cradle bearing seat 8 is connected with the sector gear 6 through a cradle shaft; a servo motor 9 is arranged on the right side of the supporting bedplate 7; the servo motor 9 is connected with a motor gear 10 through a crankshaft of the servo motor to drive the motor gear 10 to rotate, the motor gear 10 drives a sector gear 6 meshed with the motor gear to rotate, and the sector gear 6 rotates around a cradle shaft; the servo motor 9, the cradle bearing seat 8, the sector gear 6, the motor gear 10 and the upper supporting plate 5 form a cradle assembly; the cradle assembly is mounted on a fixed support of the lathe.
Further, the cutter head 1 adjusts the eccentric amount through a fine adjustment device; the fine setting device comprises spacing regulating block 3, electric putter 11, linear guide, the vice A12 of slider, and the fine setting device is installed between 5 and well layer boards 4 of layer board, and 5 bottom surfaces of layer board have the inclination to be 100: 1, the upper end of a limit adjusting block 3 is inserted into the slot, the limit adjusting block 3 is arranged at different positions in the slot, gaps at two sides of the slot are different, and an electric push rod 11 arranged on a middle supporting plate is utilized to push or pull the upper supporting plate to eliminate gaps in the slot, so that the left or right offset distance between the center of a micro cutter head and the center of a cradle shaft is obtained; when the limiting adjusting block is pushed to the bottom leftwards, the adjusting gap is 0.00 mm, namely the center of the cutter head is superposed with the center of the cradle; when the workpiece is pushed to the bottom rightwards, the gap is adjusted to be +/-1.00 mm; the total regulating quantity is 0 to plus or minus 1.00 mm. (with the function of amplifying by 100 times, namely, the eccentricity of 0.01 mm is required to be set, and the slide block can be adjusted by 1 mm).
Furthermore, the sector gear 6 is a double-layer gear, the upper layer gear is sleeved on the cradle shaft in an empty mode, and a strong spring is arranged between the two layers, so that the double wheels are staggered, and the gear backlash during gear transmission is eliminated.
The working principle of the invention is as follows:
1) a gear cutting part: the cutter head 1 and the driving motor 15 are arranged on the lower supporting plate 2, and the motor drives the cutter head to perform continuous rotation gear cutting through a transmission belt 17; in order to improve the cutting effect: the cutting edges of the cutterhead are divided into left and right cutting edges, the cutting edges are ground according to the angles of the respective cutting edges, the total number of the cutting edges of the cutterhead is an even number, and the left and right cutting edges are staggered;
2) a cradle part: the cradle is a mechanism for controlling the cutter to rotate around the central shaft of the shaping wheel;
the gear cutting machine is composed of a servo motor 9, a cradle bearing seat 8, a sector gear 6, a motor gear 10 and an upper supporting plate 5, wherein the components are all arranged on a fixed support, and the support is immovable in the gear cutting process. The rotation of the servo motor drives the sector gear 6 to rotate around the bearing seat through the motor gear 10, and the lower gear of the sector gear is fixed on the upper supporting plate and drives the lower part and the cutter head to rotate around the cradle shaft.
The sector gear 6 is a double-layer gear, the upper layer gear is sleeved on the cradle shaft in a hollow way, and a strong spring is arranged between the two layers, so that the double wheels are staggered to eliminate the gear backlash during gear transmission.
Cradle speed nRocking deviceWith the rotational speed n of the workpiece gearToothThe ratio is as follows:
nrocking device＝nToothX cos δ is the gear pitch cone angle;
3) the process adjustment part comprises the following steps:
the following three parts (set before starting up) are mainly adjusted according to gear parameters:
the first is that: and adjusting the inclination angle of the whole mechanism according to the pitch cone angle, loosening bolts on the fixing frame 7 and holes, and rotating the fixing frame to enable the central line of the cradle shaft to be perpendicular to the pitch cone generatrix of the gear. And the tool carrier is adjusted to ensure that the central line of the cradle shaft is superposed with the gear cone top.
Secondly, the cutter teeth of the cutter head are adjusted to be tangent at the midpoint of the tooth root, and the method comprises the following steps: 1) adjusting the rotating radius of the cutter head around the cradle according to the outer cone distance of the gear, wherein the part consists of a middle supporting plate 4, a linear guide rail, a sliding block pair 14, a lower supporting plate 2 and an adjusting screw rod 13, and the lower supporting plate 2 moves forwards or backwards by rotating a hand wheel 13 so as to adjust the distance A between the central line of the cutter head and the central line of the cradle shaft; 2) the downward moving distance B of the tool carrier (or the middle carriage) is adjusted.
The calculation method is as follows:
Rfz＝R/COS(ε)-b/(2cos(ε))
A＝[R sin(θ)-R sin(θf)+Rfzcos(θf)]/cos(θ)
B＝R cos(θ)+Rfzsin(θ)-R cos(θf)-Rfzsin(θF)
in the formula:
Rfzroot midpoint cone distance mm:
r, the pitch cone midpoint cone distance is mm;
b, tooth width mm
Epsilon, root angle; theta, pitch angle; thetafA root angle;
a, moving distance of the lower supporting plate;
b, knife rest (or distance moving middle splint)
Thirdly, because the tooth shapes of the bevel gears are intersected on the cone tops, but the milling cutter disc has a certain thickness, if the center of the milling cutter disc is aligned with the center of the gear to cut the teeth, the near tooth lines of the two sides of the teeth in the tooth width direction are not intersected with the cone tops. Therefore, the center of the cutter head is deviated from the center of the cradle shaft, the left tooth (the left side of the tooth groove) is cut, the center of the cutter head deviates to the right, and the center of the cutter head deviates to the left when the right tooth is cut. And the eccentricity t is a/2, and a is the thickness of the cutting edge of the cutter head at the pitch circle.
Because the eccentricity is very small but very accurate, the adjustment is automatically changed during the work, a fine adjustment device is specially designed for the adjustment, the fine adjustment device consists of a limit adjusting block 3, an electric push rod 11, a linear guide rail and a slide block pair A12, the fine adjustment device is arranged between an upper supporting plate 5 and a middle supporting plate 4, the bottom surface of the upper supporting plate 5 has an inclination of 100: 1, the upper end of the limiting adjusting block 3 is inserted into the notch, the position of the limiting adjusting block on the middle supporting plate 4 is moved, the gaps on two sides of the limiting adjusting block in the notch can be changed, and the more the limiting adjusting block moves rightwards, the larger the gap is. The electric push rod 11 is used for controlling the cutting of left and right teeth during working, the push-out or pull-in amount of the electric push rod is limited by the limit adjusting block 3 in the groove, and only the gaps at two sides of the limit adjusting block can be eliminated, so that the purpose of eccentric conversion of the cutter head is achieved.
In the design, when a pair of bevel gears are meshed, one gear is set as a gear blank, the other gear only has one tooth, the tooth is set as a rotary cutter (a milling cutter disc), the two gears are forced to wind respective central shafts by numerical control linkage of a machine tool, and pure rolling is carried out according to respective pitch cone lines, the cutter gear can cut a tooth groove into the processed gear blank, the tooth profile is an involute, the gear with the cutter is commonly called a generating wheel, the processing method is also called a generating method, and then one tooth is continuously cut by indexing until the cutting is finished.
The bevel gear generating milling head provided by the invention is designed by using the formation principle of gear tooth shape, can be arranged on tooth damage production equipment, and is linked with a workpiece spindle of the equipment to form a bevel gear blank and tooth shape processing integrated machine, so that the difficult problem of pinion clamping and secondary clamping errors are avoided, a cutter is simplified, the use cost of the cutter is reduced, and the working efficiency is improved.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.
Claims (2)
1. A bevel gear generating method milling head is characterized in that: the automatic gear cutting machine comprises a cutter head, a lower supporting plate, a limiting adjusting block, a middle supporting plate, an upper supporting plate, a sector gear, a supporting platen, a cradle bearing seat, a servo motor, a motor gear, an electric push rod, a sliding block pair A, an adjusting screw rod, a hand wheel, a sliding block pair B and a driving motor, wherein the cutter head is arranged on the left side of the bottom surface of the lower supporting plate, the driving motor is arranged on the right side of the bottom surface of the lower supporting plate, and the driving motor is connected with the cutter head through a transmission belt and drives the cutter; the cutter head and the driving motor form a gear cutting assembly;
a sliding block pair B is arranged on the lower supporting plate, a middle supporting plate is arranged on the sliding block pair B, an adjusting screw rod is arranged between the lower supporting plate and the middle supporting plate, the adjusting screw rod is inserted into the sliding block pair B, and a hand wheel is arranged at the outer side end of the adjusting screw rod;
the front surface of the middle supporting plate is provided with a plurality of limiting holes, limiting adjusting blocks are arranged on the limiting holes, a sliding block pair A is arranged on the middle supporting plate, and an electric push rod is arranged on the sliding block pair A; an upper supporting plate is arranged on the sliding block pair A;
a sector gear is arranged on the left side of the upper supporting plate, a motor gear is arranged on the right side of the upper supporting plate, and the motor gear is meshed with the sector gear; a support platen is arranged above the motor gear, a cradle bearing seat is arranged on the left side of the support platen, and the cradle bearing seat is connected with the sector gear through a cradle shaft; a servo motor is arranged on the right side of the supporting bedplate; the servo motor is connected with the motor gear through a crankshaft of the servo motor and drives the motor gear to rotate, the motor gear drives the sector gear meshed with the motor gear to rotate, and the sector gear rotates around the cradle shaft; the servo motor, the cradle bearing seat, the sector gear, the motor gear and the upper supporting plate form a cradle assembly; the cradle assembly is mounted on a fixed support of the lathe.
2. The bevel gear generating milling head of claim 1, wherein: the cutter head adjusts the eccentric amount through a fine adjustment device; the fine setting device comprises spacing regulating block, electric putter, linear guide, the vice A of slider, and fine setting device installs between layer board and well layer board, and the layer board bottom surface has the inclination to be 100: 1, the upper end of a limit adjusting block is inserted into a slot, the limit adjusting block is arranged at different positions in the slot, gaps at two sides of the slot are different, and an electric push rod arranged on a middle supporting plate is utilized to push or pull the upper supporting plate to eliminate gaps in the slot, so that a left or right offset distance between the center of a micro cutter head and the center of a cradle shaft is obtained; when the limiting adjusting block is pushed to the bottom leftwards, the adjusting gap is 0.00 mm, namely the center of the cutter head is superposed with the center of the cradle; when the workpiece is pushed to the bottom rightwards, the gap is adjusted to be +/-1.00 mm; the total regulating quantity is 0 to plus or minus 1.00 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710027766.2A CN108296572B (en) | 2017-01-11 | 2017-01-11 | Bevel gear generating method milling head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710027766.2A CN108296572B (en) | 2017-01-11 | 2017-01-11 | Bevel gear generating method milling head |
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| CN108296572A CN108296572A (en) | 2018-07-20 |
| CN108296572B true CN108296572B (en) | 2020-04-07 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61168420A (en) * | 1985-01-22 | 1986-07-30 | Takeo Inoue | Method for cutting and grinding large bevel gear of large module about mp18-mp120 on the basis of generating gear cutting method |
| SU1468693A1 (en) * | 1987-04-02 | 1989-03-30 | Предприятие П/Я В-2897 | Tool head for shaving bevel gear wheels |
| JPH06339811A (en) * | 1993-05-31 | 1994-12-13 | Nissan Motor Co Ltd | Forming method of chamfered part at addendum of gear |
| CN1857838A (en) * | 2005-04-30 | 2006-11-08 | 潘旭华 | Bevel gear processing process and apparatus |
| CN101342617A (en) * | 2008-08-19 | 2009-01-14 | 天津市精诚机床制造有限公司 | Four-shaft four-linkage numerical control spiral bevel gear milling machine arrangement |
| CN205237231U (en) * | 2015-11-02 | 2016-05-18 | 重庆市江津区禾丰机械有限公司 | Bevel gear processing equipment |
| CN206550447U (en) * | 2017-01-11 | 2017-10-13 | 广东精美医疗科技有限公司 | A kind of bevel gear generating milling head |
-
2017
- 2017-01-11 CN CN201710027766.2A patent/CN108296572B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61168420A (en) * | 1985-01-22 | 1986-07-30 | Takeo Inoue | Method for cutting and grinding large bevel gear of large module about mp18-mp120 on the basis of generating gear cutting method |
| SU1468693A1 (en) * | 1987-04-02 | 1989-03-30 | Предприятие П/Я В-2897 | Tool head for shaving bevel gear wheels |
| JPH06339811A (en) * | 1993-05-31 | 1994-12-13 | Nissan Motor Co Ltd | Forming method of chamfered part at addendum of gear |
| CN1857838A (en) * | 2005-04-30 | 2006-11-08 | 潘旭华 | Bevel gear processing process and apparatus |
| CN101342617A (en) * | 2008-08-19 | 2009-01-14 | 天津市精诚机床制造有限公司 | Four-shaft four-linkage numerical control spiral bevel gear milling machine arrangement |
| CN205237231U (en) * | 2015-11-02 | 2016-05-18 | 重庆市江津区禾丰机械有限公司 | Bevel gear processing equipment |
| CN206550447U (en) * | 2017-01-11 | 2017-10-13 | 广东精美医疗科技有限公司 | A kind of bevel gear generating milling head |
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Effective date of registration: 20211125 Address after: 528000 workshop 1, first floor, building A15, Guangdong new light source industrial base, Luocun, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee after: FOSHAN KUAILIXING TECHNOLOGY CO.,LTD. Address before: The town of Nanhai District, Guangdong city of Foshan province Luo village Langsha new light industrial base of Guangdong core area A district 15 floor of Building 2 Patentee before: GUANGDONG JINME MEDICAL TECHNOLOGY CO.,LTD. |