SU1049207A2 - Gear shaper - Google Patents

Abstract

DENTAL MACHINE on auth. 837635, characterized in that, in order to increase productivity, the machine is equipped with a sinus mechanism introduced into the drive of circular feeds, the driving link of which is kinematically connected with the drive shaft of the machine, and the driven link with the driving link of the curved-head1 / output mechanism, works in antiphase with a crank-beam mechanism.

Description

The invention relates to a machine tool industry, specifically to sub-machine tools operating under the conditions of a dressing. On the main auth, sv. No. 837635 is a gear shaping machine in which a circular feed drive connecting a drive shaft of a machine with a run-in chain is made in the form of two kinematic chains connected by a summing mechanism, one of these chains comprising a crank-linking mechanism and a discrete action mechanism. The drive reports movement into the chain of rolling with a working circular feed discretely only during the period of progressive working stroke of the cylinder. In the case of a return free run of the trough into the chain of rolling, a movement whose speed is small and does not exceed the gap formed between the tines of the trough and the wheel being cut is reported. This eliminates the phenomenon of mashing the teeth of the bit and, as a result. It provides an increase in the dimensional stability of the chisel and an improvement in the quality of tooth processing l. In a known machine, the machine time of the splinter increases, as the discrete working circular feed varies sinusoidally. During the working stroke of the dolba, its value increases from the minimum at the beginning of the turn to the calculated one in the middle part of the stroke and then decreases again to the minimum at the end of the turn. This is due to the fact that at a constant circular frequency of rotation of the leading link of the crank-beam mechanism. Its slave link makes a swing-back movement in a sinusoidal manner. The aim of the invention is to increase the productivity of the machine. The goal is achieved by the fact that the gear-shaping machine is equipped with a sinus mechanism inserted into the drive of circular feeds, the leading link of which is kinematically connected with the drive shaft, and the follower with the leading link of the crank-beam mechanism, and the sinus mechanism is set to work in anti-phase with the crank beam mechanism. The drawing shows the general scheme of the machine. Priryd circular feed machine with a common motor is made in. Yidi two kinematic chains. The first circuit contains a kinematic na py 1, located on a drive shaft 2, a kinematic pair 3, a sinus mechanism 4, a kinematic pair 5, a crank-beam mechanism 6, a discrete mechanism 7, a tuning organ 8, an input 9 of the summing mechanism 10. Second the chain includes a kinematic pair 11 located on the drive shaft 2, a non-tunable kinematic branch 12, an input 13 of the summing mechanism 10. An output 14 of the summing mechanism 10 is connected with a kinematic link 15 located in the run-in chain branching after link 15. One a branch links this link through setting body 16, kinematic pairs 17 and 18 with a dividing table 19 of the machine, another branch — via kinematic pairs 20 and 21 with a ram 22 and a hollow 23. The sinus mechanism 4 is made in the form of a pair of identical sinusoidal wheels 24 and 25 Sinusoidal wheels can be replaced by zlliptical or quadratic wheels close to them in shape. The slave link of the sinus mechanism 4 (gear 25) is kinematically connected with the driving link 26 of the crank-beam mechanism b, the driven link 27 of which is simultaneously the leading link of the discrete action mechanism 7. The link 27 of the discrete action mechanism is made in the form of a ring with grooves 28 on the inside, the names of the diam bevels 29 on one side, covering the disk 30, bearing fingers 32 in the grooves 31, resting on the springs 33. The number of grooves 28 on the cylinder is larger. grooves 31 on the disk 30. The difference in angular steps of the grooves 28 and 31 determines the swing angle of the link 27, determined the period of communication of the movement from the drive shaft 2 into the rolling chain through link 15. To ensure synchronous operation of the rocker mechanism. 34, the drive of the sleeve 35 is exhausted with a sine mechanism 4, a crank-and-crank mechanism 6 and a discrete mechanism 7, the gear ratio of a chain section from kinetic pair 3 is one. Sinus mechanism 4 is installed to work in antiphase with a crank-arm mechanism b. The drive ratio of the drive chain — a kinematic pair 11, a kinematic branch 12, the input 13 of the summing mechanism 10 — is set so that a transfer is continuously communicated to the drive chain, the magnitude of which does not exceed the minimum clearance between the tooth teeth and the workpiece. during the return of the free course of the drive in movement The tuning element 8, for example, the guitar of interchangeable gears, is used to adjust the speed of the working circular feeds, i.e. the movement supplied to the run-in chain only during the periods of chiselling - working stroke of the engine in motion, Ilf.

The drive works as follows. When turning on the electric motor 36, the machine begins to rotate with a circular frequency, the drive shaft 2 each turn of which is converted into one double stroke of the slot 23 by means of a rocker mechanism 34 (movement P1). At the same time, from the drive room 2, a kinematic pair 11, a kinematic branch 12, an input of the summing mechanism 10, an output 14 of this mechanism — is transmitted through link 15 to the rolling chain. As a result, the rolling movement, reproduced by the matched rotation Bj of the slot 23. and the rotation of the divider table 19, is carried out at a minimum speed (which ensures a constant tension on the gear of the rolling chain and the return free movement of the blade without rubbing its teeth against the profiled teeth of the workpiece.

During the working stroke of the dolly 23 in the movement of P4, the movement is connected with the working circular feed along the kinematic chain — kinematic pairs 1 and 3, the sinus mechanism 4, the kinematic pair 5, the crank-linker mechanism 6, the mechanism 7 of discrete action, the organ 8 on - settings, input 9 of the summing mechanism 10, output 14 of this mechanism - and then through the adjusting element 16 - to the separating table, and through the kinematic pairs 20 and 21 - the ram 22 of the cylinder 23. Moreover, during each working stroke of the cylinder the working circular feed has a constant calculation This value is set by setting authority 8.

In the case of a return free run, the movement with a working circular feed into the run-in chain is not reported.

With such a drive of the circular feed rates of the machine, the circular frequency of rotation of the driving link of the crank-and-shaft mechanism varies sinusoidally. At the same time, its maximum corresponds to the beginning and end of the working stroke of the dredge, and

0 minimum of the middle part of the stroke. The circular oscillation frequency of the slave link of this mechanism also varies according to the rhinusoidal law, but in phase, i.e. its maximum

5 corresponds to the middle part of the stroke dlb ka. As a result of the addition of two sinusoidal movements having the same amplitude and frequency, the 1-level mechanism will report 0 through the mechanism of discrete action during periods of the stroke of the continuous circular feed into the chain of rolling. This provides increased machine productivity. -t

Claims (1)

DENTAL SHOP MACHINE by Auth. "837635, characterized in that, in order to increase productivity, the machine is equipped with a sinus mechanism introduced into the circular feed drive, the driving link of which is kinematically connected to the drive shaft of the machine, and the driven link with the crankshaft driving link" is a 4-link mechanism, and the sinus mechanism is installed for work in antiphase with a crank-rocker mechanism.