内齿轮在滚齿机 FD250 上制造的可能性外文文献翻译中英文翻译外文翻译.docx

1、内齿轮在滚齿机 FD250 上制造的可能性外文文献翻译中英文翻译外文翻译INTERNAL GEARS MANUFACTURING POSSIBILITY ON THE GEARHOBBING MACHINE “FD250”Sandor RAVAI NAGY, North Univrsity of Baia Mare, RomaniaGabor Laszlo PAY, Ph.D., College of Nyiaregyhaza, HungaryAbstract: The paper presents the possibility to modify the FD250 gear hobbin

2、g machine, with a device, in a machine apply to manufacturing internal gears. Redesigned and equipped with device it is possible to obtain a machine tool with higher universality and a possibility to decrease the manufacturing price for the internal spur and helical gear.Key words: Internal gears, g

3、ear hobbing machine, design, device.1. INTRODUCTION The paper presents the possibility to manufacture the internal cylindrical gears on the gear hobbing machines. To the present almost all internal gears what is manufactured with metal cutting methods are use the gear shaping procedures. With the pr

4、esented solution it is possible to eliminate some problems what presuppose the gear shaping methods. In case when its manufactured helical gear for each helix angle the gear shaper need a varied 3D cam. This 3D cam presents many technical problems when are manufactured and his precision has direct i

5、nfluence on the gear precision. On the financial side the gear hobbing machine are cheaper and his productivity are higher. 2. APPLICATION AREA This method and the device find applicability in branch of gear manufacture firms in case when it is needs to obtain gears for prototype and small series. C

6、oncomitantly is a possibility to invest in the existing machines to growth the machines productivity. With the presented device the universality of machines are growled and it is succeeding to manufacture on the same machine differed types of gears. 3. THE “FD250” GEAR HOBBING MACHINE The FD250 gear

7、 hobbing machine (Figure 1.) was designed by the Cugir Mechanical Factory able to manufacture spur and helical gears with 250-300 mm maximal diameter and m=6 mm maximal module. On this machine it is possible to manufacture all work-piece with the generating method in the presented limits. For hob th

8、e maximal dimensions are the follows: Dh=105mm, Lh =100mm (hob diameter and length). Fig. 1. The FD250 gear hobbing machine4. THE “FD250” HOBBING MACHINE MODIFY TO BY ABLE MANUFACTURE INTERNALS GEARS To effectuate the cutting procedure the cutting tools must by positioned inside of the donut form wo

9、rk-piece. For this the kinematics chain of primary motion for the hob must by to prolong. This proposed modification and the original kinematics chain are presented in (Figure 2.a. respective 2.b.) Fig. 2.a. The modified kinematics chain Fig. 2.b. The original kinematics chain In conformity with the

10、 adopted manufacturing method form-copying method or generating method in kinematics chain of indexing must introduce a manually indexing device for form copying case. After a dimensional and design study the follow possibility for modification are identified: 1- The work piece is fixed on the rotar

11、y-table and the cutting tool in device that introduce inside on the work piece, without modified the rear column. (Figure.3.) Fig.3. Hobbing machine without modified the rear columnThis solution is applying in case of work piece with external diameter under 330mm, because the rear column limits the

12、work piece dimensions. 2- The work pieces are fixed on the rotary-table and the cutting tool in device that introduce inside on the work piece and the rear column are dismantling. (Figure.4.) Fig.4. Hobbing machine with dismantled rear columnIn this case its possible to manufacture work piece with 8

13、00-850 mm maximum diameter. But in this case must by accorded a several attention for what cutting data are choice for avoid the over require the kinematics chain of indexing. It is imported to not forget that FD250 are designed for cutting data adequate for work piece with maximal diameter 250-300

14、mm. The work piece is fixed on the rotary-table of gear hobbing machine with jaw church or with faceplate, in depends on his dimension. 5. USED CUTTING TOOLS The possible used cutting tools are the followings: - Gear-tooth side milling cutter, in case when the internal gear are manufactured with the

15、 form-copying method, tooth space by tooth space. (Figure.5.)The tools profile is obtaining similar with the profile for external dears, taking in consideration the contact between the gears in gearing are convex-concave. Fig.5. Gear-tooth side milling cutter Fig.6. Ellipsoid hob and fly hob- Ellips

16、oid hob (Figure.6.) and fly hob, in case when the internal gears is manufactured with the generating methods. With the ellipsoid hob and fly hob it is possible to generate worm wheel for the internal worm . 6. DEVICE FOR THE CUTTING TOOLS FOR MANUFACTURING INTERNAL GEARS AND WHEELS. The proposed device for a simply use must by designed thus that do not modify the calculus method