CN102380673B - Digital control large curve-tooth bevel gear broaching machine - Google Patents
Digital control large curve-tooth bevel gear broaching machine Download PDFInfo
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- 230000001050 lubricating effect Effects 0.000 claims abstract description 5
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Abstract
The invention relates to a digital control large curve-tooth bevel gear broaching machine, which comprises a bed body assembly, a tool case assembly, a workpiece case assembly, a digital control system, a hydraulic system, a lubricating system and a cooling scrap removing system, wherein the bed body assembly is connected with the tool case assembly, and a feeding mechanism is arranged in the tool case assembly; the bed body assembly is provided with a workpiece case assembly through a pair of trunnions, and an indexing mechanism is arranged in the workpiece case assembly. The digital control large curve-tooth bevel gear broaching machine is characterized in that: a cross beam clamping device which is used for fixing the relative position of the workpiece case assembly and the tool case assembly and is used for the workpiece case assembly to regulate a swinging angle is arranged on the workpiece case assembly and the tool case assembly; and a hydraulic clamping device is arranged in the indexing mechanism. The digital control large curve-tooth bevel gear broaching machine has the advantages that: a machine tool can be kept in a constant clamping state in a cutting process due to the cross beam clamping device, the high-rigidity frame structure of the whole machine tool is formed, a maximum processing rigidity is realized, and the structure of the machine tool is fully simplified. With an indexing damping and hydraulic clamping device, the indexing action of the machine tool is smooth, accurate and reliable, and the processing precision of the gear is improved.
Description
Technical field
The invention belongs to the gear-broach machine technical field, particularly relate to the large-scale spiral bevel gear broaching machine of a kind of numerical control.
Background technology
Bull wheel in curved-tooth bevel gear wheel set or hypoid gear pair is widely used in the various industries such as automobile, tractor, engineering machinery, military project as the vital part of transmission device.To guarantee that in spiral bevel gear and Machining of Near-Hyperboloid Gear process the teeth directional, profile of tooth, tooth pitch equal error of gear in certain claimed range, can guarantee that just processed tooth transmission accuracy is high.Its workpiece box of numerical control spiral bevel gear broaching machine of the prior art is mounted on turntable, the feeding of toolbox and to retreat be to complete by the driven by servomotor ball-screw, therefore the feeding of toolbox and retreating is all born by ball-screw, because the ball-screw load-bearing is heavier, therefore it is produced heavy wear, and affects the precision of ball-screw.In addition, because the cutting of large gear is had relatively high expectations to the lathe integral rigidity, the frock of above-mentioned gear-broach machine is installed perpendicular to the horizontal plane of lathe bed, also need rely on the angle of workpiece box on turntable to satisfy the actual cut angle during its cutting, therefore main cutting force all concentrates on workpiece box, makes workpiece box and turntable must bear larger chip-load.So not only can affect the integral rigidity of lathe, use also can affect the machining accuracy of lathe for a long time.
Above-mentioned gear-broach machine is in the workpiece working angles, and because the calibration of indexing mechanism acts frequently, required time is shorter, and during the worm and gear engagement, its gap is difficult to quick elimination; In addition, because worm and gear meshes for a long time, under the protection without backlash eliminating equipment, will affect and reduce indexing accuracy.Workpiece clamping is to step up workpiece box integral body by hydraulic cylinder, because its main cutting cutter concentrates on the workpiece casing, utilizes the hydraulic clamp workpiece box can't avoid workpiece that small play occurs in working angles.By the development of in enormous quantities, few kind to small batch, many kinds, more and more to the quantity required of large-scale high-precision gear, quality requirement is also more and more higher along with auto industry production, and traditional numerical control spiral bevel gear broaching machine can't adapt to above-mentioned requirements.
Summary of the invention
But the present invention provides a kind of enhanced machine bed ensemble rigidity, fully simplifies machine tool structure and can increase substantially the gear compound graduation precision and the large-scale spiral bevel gear broaching machine of numerical control of machining precision for solving the technical problem that exists in known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is:
The large-scale spiral bevel gear broaching machine of numerical control, comprise lathe bed assembly, toolbox assembly, workpiece box assembly, digital control system, hydraulic system, lubricating system and cooling chip removal system, described lathe bed assembly is connected with the supporting plate that it is slided along bed ways by screw pair, connect the toolbox assembly by screw pair on supporting plate, in described toolbox assembly, delivering gear is installed; Being equipped with by a pair of gudgeon on described lathe bed assembly can be around the workpiece box assembly of gudgeon center rotating, and described workpiece box assembly is connected with the hydraulic cylinder that is arranged on lathe bed assembly one side; Be provided with indexing mechanism in described workpiece box assembly, it is characterized in that: be equipped with on described workpiece box assembly and toolbox assembly top be used to fixing its relative position and be used for the machine beam clamping device that the workpiece box assembly is regulated pendulum angle between the two, be provided with in described indexing mechanism for the hydraulic damping device of eliminating calibration action play gap.
The present invention can also adopt following technical scheme:
Described machine beam clamping device comprises transverse beam assembly and clamp mechanism, described transverse beam assembly comprises arc plate, middle slide plate and upper slide, the end cap that described clamp mechanism comprises the bearing affixed with toolbox assembly top, be arranged on piston rod in bearing, be fixed on bearing both sides and the clamp jaw that is connected bearing pin and is connected with piston rod, be provided with Compress Spring between described piston rod and end cap, on the bearing of described clamp mechanism, contact-relay be installed.
The arc plate of described transverse beam assembly is affixed by securing member and workpiece box assembly top, be fixed with arc rack on the arc plate arc surface, be equipped with the arc rack engagement in described middle slide plate and can make middle slide plate along the gear shaft of arc plate arc surface slip, the relative position of arc plate and middle slide plate is fixed by T-shaped screw, also be fixed with one in middle slide plate and can drive the screw rod that upper slide slides along the middle slide plate keyway, the screw rod other end connects upper slide, the relative position of middle slide plate and upper slide is fixed by bolt, nut, and the described upper slide other end is shaped with the convex locating piece.
Comprise the hydraulic damping device of eliminating play gap in the calibration action and Workpiece clamping part, main shaft claming part in described indexing mechanism.
Described Workpiece clamping partly comprises the small-sized hydraulic piston cylinder affixed with cutter spindle one end, and the piston rod of piston cylinder is overhanging to be gone out the piston cylinder cylinder body and pack in cutter spindle, the described piston rod head pull bar that is threaded, and connect workpiece by pull bar.
Described main shaft claming partly comprises the hydraulic cylinder that is arranged in main spindle box and is sleeved on small-sized hydraulic piston cylinder outside, be equipped with in described hydraulic cylinder one with the fixing friction plate of cutter spindle one end, be provided with the hydraulic cylinder piston sheet between described friction plate and hydraulic cylinder.
Be equipped with slight clearance between described friction plate two sides and main spindle box body inwall, piston sheet.
Advantage and good effect that the present invention has are: because the present invention adopts technique scheme, namely by the relative position between machine beam clamping device fixed cutting tool box assembly and workpiece box assembly, make lathe be in all the time clamped condition in whole working angles, consist of the high rigid frame type structure of lathe integral body; Due to the main cutting force sensing lathe bed of gear-broach machine bed, so this lathe can utilize the lathe bed quality to obtain maximum processing rigidity, and fully simplify the lathe overall structure.In addition, adopt numerical control scale-division and auxiliary calibration damping unit and calibration hydraulic clamp, make the calibration stable action of lathe, accurately, reliable, and then avoid workpiece that small play occurs in working angles, raising Gear Processing precision.So not only the processing of large gear can be realized, but also the requirement that auto industry is produced small batch, many kinds can be satisfied.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is machine beam clamping device overall structure schematic diagram of the present invention;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is clamp mechanism structural representation in Fig. 2;
Fig. 5 is indexing mechanism structural representation of the present invention;
Fig. 6 is delivering gear structural representation of the present invention.
In figure: 1, lathe bed assembly; 1-1, supporting plate; 2, toolbox assembly; 3, variable-frequency motor; 4, delivering gear; 4-1, small-sized driving box; 4-2, servomotor output shaft; 4-3, pinion axle sleeve; 4-4, pressing plate; 4-5, gear wheel; 4-6, major axis cover; 4-7, ball screw assembly; 4-8, ring flange; 4-9, bearing outer end cap; 4-10, thrust bearing; 4-11, cutter spindle gear wheel; 4-12, cutter spindle; 5, machine beam clamping device; 5-1, upper slide; 5-2, middle slide plate; 5-3, arc plate; 5-4, tooth bar; 5-5, gear shaft; 5-6, screw rod; 5-7, convex locating piece; 5-8, bearing; 5-9, piston rod; 5-10, end cap; 5-11, bearing pin; 5-12, clamp jaw; 5-13, Compress Spring; 5-14, relay; 6, workpiece box assembly; 7, main spindle box body; 8, indexing mechanism; 8-1, work spindle; 8-2, worm gear; 8-3, worm screw; 8-4, endless screw support; 8-5, gear wheel; 8-6, pinion shaft; 8-7, hydraulic motor; 8-8, small-sized hydraulic piston cylinder; 8-9, piston rod; 8-10, hydraulic cylinder; 8-11, piston sheet; 8-12, friction plate; 9, gudgeon; 10, hydraulic cylinder.
The specific embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
See also Fig. 1-Fig. 6, the large-scale spiral bevel gear broaching machine of numerical control, comprise lathe bed assembly 1, toolbox assembly 2, workpiece box assembly 6, digital control system, hydraulic system, lubricating system and cooling chip removal system, described digital control system, hydraulic system, lubricating system and cooling chip removal system be not expression in the drawings all.Described lathe bed assembly is connected with by screw pair and makes it along the supporting plate 1-1 that bed ways slide, and connects toolbox assembly 2 by screw pair on supporting plate.In described toolbox assembly, delivering gear 4 is installed, also be equipped with on toolbox assembly 2 for the variable-frequency motor 3 that drives the cutter spindle gyration, being equipped with by a pair of gudgeon 9 on described lathe bed assembly 1 can be around the workpiece box assembly 6 of gudgeon center rotating, and described workpiece box assembly is connected with the hydraulic cylinder 10 that is arranged on lathe bed assembly one side.
Described delivering gear 4 terminals are fixedly connected with by screw with cutter spindle 4-12, delivering gear relies on driven by servomotor, servomotor is fixed on the outer wall of small-sized driving box 4-1, servomotor output shaft 4-2 connects a pinion axle sleeve 4-3, both rely on pressing plate 4-4 screw to be fixed together, and the pinion axle sleeve supports by a pair of ball bearing and is fixed in small-sized driving box casing.Pinion axle sleeve 4-3 and gear wheel 4-5 engagement, described gear wheel are fixed on a major axis cover 4-6, fixing ball screw assembly, 4-7 in the major axis cover, and major axis overlaps two ends all to be fixed by bearings.Cutter spindle 4-12 tail end is fixed a thrust bearing 4-10 by screw, and thrust bearing outer end cap 4-9 is fixed on bearing block, and cutter spindle gear wheel 4-11 is housed on cutter spindle.The ball-screw overhanging end is fixed a ring flange 4-8 by locking nut, and ring flange is fixed on the bearing outer end cap by screw, above-mentioned formation feed action transmission system.The rotation of servomotor output shaft is the rotation of major axis cover by the meshing gear transmission, causes leading screw to advance, retreat, and pulls cutter spindle to advance, retreat.Feed action and cutter spindle gyration mutually noninterfere are carried out simultaneously.The advance and retreat scope of cutter spindle can utilize approach switch to control advance and retreat stroke and the position of making zero within the leading screw travel range.Described gear wheel 4-5 is fixed together by two identical gear wheels and forms, both all mesh with the pinion axle sleeve, but profile of tooth certain angle that staggers in the time of fixedly, during engaged transmission, pinion axle sleeve profile of tooth both sides all with one of them engagement of gear wheel, the advantage of assembling is to rely on the gear wheel of two certain angles that stagger and pinion to mesh the gap that can eliminate to a certain extent in this part transmission like this, guarantees that leading screw advance and retreat stroke is more accurate, makes cutter fed rat more accurate.
Described workpiece box assembly 6 and toolbox assembly 2 tops are equipped be used to fixing its relative position and regulate the machine beam clamping device 5 of pendulum angle as the workpiece box assembly between the two, described machine beam clamping device comprises transverse beam assembly and clamp mechanism, and described transverse beam assembly comprises arc plate 5-3, middle slide plate 5-2 and upper slide 5-1.The arc plate of described transverse beam assembly is affixed by securing member and workpiece box assembly top, be fixed with arc rack 5-4 on the arc plate arc surface, by gear shaft 5-5 and arc rack engagement, middle slide plate is slided along the arc plate arc surface in described middle slide plate, the relative position of arc plate and middle slide plate is fixed by T-shaped screw.Also be fixed with one in middle slide plate and can drive the screw rod 5-6 that upper slide slides along the middle slide plate keyway, the screw rod other end connects upper slide, and the relative position of middle slide plate and upper slide is fixed by bolt, nut, and the described upper slide other end is shaped with convex locating piece 5-7.Described clamp mechanism comprises the bearing 5-8 affixed with toolbox assembly top, and piston rod 5-9 is installed in bearing, is fixed with end cap 5-10 and the clamp jaw 5-12 that is connected bearing pin 5-11 and is connected with piston rod in bearing both sides.Be provided with Compress Spring 5-13 between described piston rod and end cap, contact-relay 5-14 on the bearing of described clamp mechanism.After system pressure oil entered bearing, the pushing piston bar was pressed clamp jaw to the top, both sides, made it clamp the crossbeam upper slide, and when the unloading of system pressure oil, Compress Spring recovers the home position, and clamp jaw opens.
The hydraulic cylinder 10 that is arranged on lathe bed assembly 1 one sides is subjected to HYDRAULIC CONTROL SYSTEM, piston rod stretches and causes 6 liftings of workpiece box assembly, after hydraulic cylinder jack-up workpiece box assembly, the workpiece box assembly rotates around gudgeon 9 central shafts and rises, after upper slide 5-1 front end convex locating piece touches the contact-relay 5-14 that is fixed on clamp mechanism, clamp jaw 5-12 clamps upper slide, thereby makes toolbox assembly 2, clamp mechanism, transverse beam assembly, workpiece box assembly, lathe bed assembly consist of high rigid frame type structure.In working angles, clamp jaw clamps upper slide all the time under hydraulic system pressure, after cutting is complete, and hydraulic system unloading clamping system pressure, clamp jaw opens, and hydraulic cylinder piston rod shrinks, and the workpiece box assembly drops to horizontal level.Fix a rhizoid thick stick on described lathe bed assembly, fix a bearing below supporting plate, the bearing internal thread coordinates with leading screw, by the Wrench rotational lead screw, can drag supporting plate and slide on bed ways, the position of adjusting supporting board.Described supporting plate is also fixed a rhizoid thick stick, a bearing is fixed in toolbox assembly below, the bearing internal thread coordinates with leading screw, by the Wrench rotational lead screw, can drag the toolbox assembly slides along the supporting plate keyway, regulate the position of toolbox assembly, the supporting plate moving direction is vertical with toolbox assembly moving direction.Described upper slide and middle slide plate rotate by a screw rod interlock screw rod that is fixed in middle slide plate by Wrench, can drag upper slide and advance, retreat.Described middle slide plate and arc plate link by rack-and-pinion, are shaped with arc surface below middle slide plate, and match with the arc surface of arc plate, by Wrench turning gear wheel shaft 5-5, can drag middle slide plate and slide.After upper slide convex locating piece that the workpiece box assembly is raised up to transverse beam assembly touched contact-relay 5-14, the clamp mechanism of described machine beam clamping device drove the upper slide 5-1 that clamps transverse beam assembly by hydraulic system, and then the position of fixation workpiece box assembly.
Be provided with indexing mechanism 8 in described workpiece box assembly, described indexing mechanism is by driven by servomotor, motor output shaft is by shaft coupling connecting worm 8-3, the worm screw two ends are supported by a pair of ball bearing and are fixed in endless screw support 8-4, work spindle 8-1 cylindrical is by the fixing worm gear 8-2 of screw, the worm and gear engagement consists of the indexing mechanism of being controlled calibration by digital control system.Described worm gear is fixed a gear wheel 8-5 and is meshed with a pinion shaft 8-6, and pinion shaft connects a hydraulic motor 8-7, and hydraulic motor is fixed in main spindle box body 7, above-mentioned formation hydraulic damping device.When the work spindle calibration, hydraulic work system drives hydraulic motor and produces the moment of torsion opposite with work spindle gyratory directions tangent line, this torsional interaction is on pinion shaft, and pass to the worm and gear kinematic pair by gear wheel, make the worm and gear engagement rotate the opposing torque that is subject to all the time simultaneously from damping unit, eliminate the play gap in the calibration action, make the calibration process more steady, accurate.
Also be provided with in described indexing mechanism for the hydraulic clamp that keeps main shaft and workpiece indexing position thereof, described hydraulic clamp comprises Workpiece clamping part and main shaft claming part.Described Workpiece clamping partly comprises the small-sized hydraulic piston cylinder 8-8 affixed with work spindle 8-1 one end, and the piston rod 8-9 of small-sized hydraulic piston cylinder stretches out cylinder body outward and packs in work spindle, the described piston rod head pull bar that is threaded, and connect workpiece by pull bar.Described main shaft claming partly comprises the hydraulic cylinder 8-10 that is arranged in main spindle box body 7 and is sleeved on small-sized hydraulic piston cylinder outside, be equipped with in described hydraulic cylinder one with the fixing friction plate 8-12 of work spindle one end, be provided with hydraulic cylinder piston sheet 8-11 between described friction plate and hydraulic cylinder.Be equipped with slight clearance between described friction plate two sides and main spindle box body inwall, piston sheet.Described hydraulic clamp is under hydraulic system drives, and piston rod advances, retreat and pull the pull bar lifting, and when cutting workpiece, piston rod retreats, and pull bar descends, and workpiece is tightened up, and after cutting was complete, piston rod advanced, and pull bar rises, and workpiece is released.Described main shaft claming relies on hydraulic cylinder 8-10 and friction plate 8-12 to realize, hydraulic cylinder is peripheral at the small-sized hydraulic piston cylinder, is fixed in main spindle box, has a friction plate to be fixed in the main shaft tail end in hydraulic cylinder.Between friction plate two sides and main spindle box body, hydraulic cylinder piston sheet 8-11, slight clearance is arranged all.When calibration was completed, cutting workpiece need to guarantee that workpiece is not offset by position and calibration completing place under the cutting force effect.Hydraulic work system gives piston sheet pressure in hydraulic cylinder, and this masterpiece is used for friction plate, and it firmly is pressed in main spindle box body, and main shaft is clamped under the frictional force effect.By Workpiece clamping and main shaft claming, guarantee that like this workpiece is in clamped state all the time in working angles, guarantee flank of tooth fineness and tooth pitch precision.
Claims (6)
1. large-scale spiral bevel gear broaching machine of numerical control, comprise lathe bed assembly, toolbox assembly, workpiece box assembly, digital control system, hydraulic system, lubricating system and cooling chip removal system, described lathe bed assembly is connected with the supporting plate that it is slided along bed ways by screw pair, connect the toolbox assembly by screw pair on supporting plate, in described toolbox assembly, delivering gear is installed; Being equipped with by a pair of gudgeon on described lathe bed assembly can be around the workpiece box assembly of gudgeon center rotating, and described workpiece box assembly is connected with the hydraulic cylinder that is arranged on lathe bed assembly one side; Be provided with indexing mechanism in described workpiece box assembly, it is characterized in that: be equipped with on described workpiece box assembly and toolbox assembly top be used to fixing its relative position and be used for the machine beam clamping device that the workpiece box assembly is regulated pendulum angle between the two, be provided with in described indexing mechanism for the hydraulic damping device of eliminating calibration action play gap;
Described machine beam clamping device comprises transverse beam assembly and clamp mechanism, described transverse beam assembly comprises arc plate, middle slide plate and upper slide, the end cap that described clamp mechanism comprises the bearing affixed with toolbox assembly top, be arranged on piston rod in bearing, be fixed on bearing both sides and the clamp jaw that is connected bearing pin and is connected with piston rod, be provided with Compress Spring between described piston rod and end cap, on the bearing of described clamp mechanism, contact-relay be installed.
2. the large-scale spiral bevel gear broaching machine of numerical control according to claim 1, it is characterized in that: the arc plate of described transverse beam assembly is affixed by securing member and workpiece box assembly top, be fixed with arc rack on the arc plate arc surface, be equipped with the arc rack engagement in described middle slide plate and can make middle slide plate along the gear shaft of arc plate arc surface slip, the relative position of arc plate and middle slide plate is fixed by T-shaped screw, also be fixed with one in middle slide plate and can drive the screw rod that upper slide slides along the middle slide plate keyway, the screw rod other end connects upper slide, the relative position of middle slide plate and upper slide passes through bolt, nut is fixed, the described upper slide other end is shaped with the convex locating piece.
3. the large-scale spiral bevel gear broaching machine of numerical control according to claim 1 is characterized in that: comprise the hydraulic damping device of eliminating play gap in the calibration action and Workpiece clamping part, main shaft claming part in described indexing mechanism.
4. the large-scale spiral bevel gear broaching machine of numerical control according to claim 3, it is characterized in that: described Workpiece clamping partly comprises the small-sized hydraulic piston cylinder affixed with cutter spindle one end, the piston rod of piston cylinder is overhanging to be gone out the piston cylinder cylinder body and packs in cutter spindle, the described piston rod head pull bar that is threaded, and connect workpiece by pull bar.
5. the large-scale spiral bevel gear broaching machine of numerical control according to claim 3, it is characterized in that: described main shaft claming partly comprises the hydraulic cylinder that is arranged in main spindle box and is sleeved on small-sized hydraulic piston cylinder outside, be equipped with in described hydraulic cylinder one with the fixing friction plate of cutter spindle one end, be provided with the hydraulic cylinder piston sheet between described friction plate and hydraulic cylinder.
6. the large-scale spiral bevel gear broaching machine of numerical control according to claim 5, is characterized in that: be equipped with slight clearance between described friction plate two sides and main spindle box body inwall, piston sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110353914 CN102380673B (en) | 2011-11-10 | 2011-11-10 | Digital control large curve-tooth bevel gear broaching machine |
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| CN 201110353914 CN102380673B (en) | 2011-11-10 | 2011-11-10 | Digital control large curve-tooth bevel gear broaching machine |
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| CN102380673B true CN102380673B (en) | 2013-06-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103624332B (en) * | 2013-07-29 | 2016-01-13 | 河南科技大学 | A kind of spiral bevel gear broaching processing method and gear-broach machine bed |
| CN106077838B (en) * | 2016-06-22 | 2018-03-20 | 天津第一机床总厂 | Low module straight bevel gear numerical control gear shaper is by knife and adjusting apparatus |
| CN105965106B (en) * | 2016-06-22 | 2018-03-20 | 天津第一机床总厂 | Numerical control low module straight bevel (gear) generator |
| CN111730152B (en) * | 2020-07-20 | 2022-12-30 | 浙江日创机电科技有限公司 | Rotary milling head of internal gear rotary milling machine |
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|---|---|---|---|---|
| GB818887A (en) * | 1956-07-02 | 1959-08-26 | Gleason Works | Improvements relating to machines for cutting gears and like toothed parts |
| SU1484490A2 (en) * | 1987-05-27 | 1989-06-07 | Ижевский механический институт | Broaching rest for gear-hobbing machine |
| CN101342615A (en) * | 2008-08-19 | 2009-01-14 | 天津市精诚机床制造有限公司 | Three-axis numerical control spiral bevel gear broaching machine |
| CN201519811U (en) * | 2009-11-04 | 2010-07-07 | 天津市精诚机床制造有限公司 | Four-axis numerical control spiral bevel gear broaching machine |
| CN202317300U (en) * | 2011-11-10 | 2012-07-11 | 天津第一机床总厂 | Numerical control large-scale spiral bevel gear broaching machine |
-
2011
- 2011-11-10 CN CN 201110353914 patent/CN102380673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB818887A (en) * | 1956-07-02 | 1959-08-26 | Gleason Works | Improvements relating to machines for cutting gears and like toothed parts |
| SU1484490A2 (en) * | 1987-05-27 | 1989-06-07 | Ижевский механический институт | Broaching rest for gear-hobbing machine |
| CN101342615A (en) * | 2008-08-19 | 2009-01-14 | 天津市精诚机床制造有限公司 | Three-axis numerical control spiral bevel gear broaching machine |
| CN201519811U (en) * | 2009-11-04 | 2010-07-07 | 天津市精诚机床制造有限公司 | Four-axis numerical control spiral bevel gear broaching machine |
| CN202317300U (en) * | 2011-11-10 | 2012-07-11 | 天津第一机床总厂 | Numerical control large-scale spiral bevel gear broaching machine |
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Effective date of registration: 20200325 Address after: 300385 No.11, Zhuyuan Road, Dasi high tech Industrial Park, Xiqing Economic Development Zone, Xiqing District, Tianjin Patentee after: Tianjin First Machine Tool Co.,Ltd. Address before: 300180, No. 146 Jintang Road, Hedong District, Tianjin Patentee before: TIANJIN NO.1 MACHINE TOOL WORKS |
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Address after: No. 11 Chuyuan Road, Dasi High tech Industrial Park, Xiqing Economic Development Zone, Tianjin, 300385 Patentee after: General Technology Group Tianjin First Machine Tool Co.,Ltd. Country or region after: China Address before: No. 11, Chuyuan Road, Dasi Hi tech Industrial Park, Xiqing Economic Development Zone, Xiqing District, Tianjin, 300385 Patentee before: Tianjin First Machine Tool Co.,Ltd. Country or region before: China |
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