SU1253765A1 - Apparatus for dressing grinding wheel of involute profile - Google Patents

Description

The invention relates to halifing, in particular to the profiling and dressing of grinding wheels with a diamond tool,

The purpose of the invention is to improve the accuracy and performance of editing the involute profile of grinding wheels of gear grinding machines by reducing the deformations under the action of cutting forces (editing) and the possibility of simultaneous editing of the circle from two sides.

FIG. 1 shows the device and editing scheme, a general view; FIG. 2 is a section A-A in FIG. 1;

In bracket 1, a housing 3 is mounted, for example, on stop centers 2, rotated relative to the axis K from an engine (not shown), for example, by means of a connecting rod 4. In the radial guides 5 of the housing 3, a slider 6 is mounted, in which the possibility of radial movement installed diamond holder 7 with diamond 8,

, On the swing axis. To the body, a copier mounted in the form of a cylindrical face cam 9 is freely mounted and attached to the bracket. Between the cam 9 and the diamond holder 7 there is a wedge mechanism for controlling the amount of movement of the diamond holder. A cam 10 interacts with the cam 9 mounted on the upper part of the lever 11, which is housed in the housing on the axis 12, perpendicular to the swing axis to the housing,

The lower part of the lever 11 interacts with the diamond holder 7 through cylindrical crackers 13 with a bald spot, which contacts the roller 14 mounted on a slider 6,

The spring 15 selects the gaps and creates a constant tension in the transmission from the copier to the diamond holder. Using a screw 16 that engages with the ring gear, is filled with 1: on the copier, the latter can be rotated, and then fixed to the bracket 1, for example, with a nut 17 on the threaded rod 18, relative to the swing axis K

The profile of the cylindrical cam 9 must be such that when turning the casing, the top of the diamond will describe the involute of the main circle of diameter d, which should exceed or be equal to the diameter of the main

grinding wheel circumference.

The shape of the cam profile in this case depends on the position of the center K of the body oTHocHTej bHo of the center O of the main circle and the starting point of the involute b. This position can be characterized by polar coordinates. natami: radius O and angle H,

It is advisable to choose these coordinates so that the point k is the center of the circle, the least deviation of the law from the evolvent with the greatest deflection angle.

Such a circle is a circle intersecting the involute at track points so that at the starting and ending points and at the points of maximum distance from the involute between

the points of intersection of the distance from it to the evolvent are the same in absolute value. The greatest angle of evohvshventa takes place with a minimum number of teeth

g 17,

Then 4 22.984% KO. 0.5045 d ,, departure k8 0,2 d,.

With this choice of the coordinates of the center of oscillations, the radial displacements of the diamond holders are minimal, amounting to 0.012 hi, where yy is the modulus.

Therefore, the swing arc of the lever 11 with the rusk 13 is very small and, therefore, close to the straight line, bla-.

at a year when, when adjusting the angle of inclination, the biscuit does not appear that violates in a noticeable way the proportionality between the movements of the roller 10 and the diamond holder 7. In addition to

Moreover, with such an optimal choice of the center of body swing center, the change in the angular orientation of the diamond-holder relative to the normal to the evolvent is at least about 11), due to the irregular shape and wear of the diamond, causing the least distortion of the circle profile. The wedge mechanism adjusts the device to the specified profile with the unchanged copier. To adjust the device to the specified profile (involute of the main circumference of diameter d), you need to move the bracket 1 so that the K rotor of the rotary body coincides with the K point, the polar coordinates of which are relative to the center of the specified circle defined3. 12537654

Are those dependencies that the transfer otnenie b1 between

The ones selected for the copier (i.e., with an op-copier and a diamond holder, it became the right choice of the copier profile; i db / d b and turn the copier

 22.984, K O 0.5045 d), extending so that the radial direction is straight, the diamond holder is spaced jp when the KAK B swing center is set, which, with the optimal choice of the point to point k, coincided with pinia

The profile of the copier should be equal to O, and in the new position it should be equal to 0.2 d, turn the cracker, give it to c; line To about.

/ Y

/ Y

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18

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Editor T. Mitejko

Compiled by I.Kuznetsova Tehred V.Kadar

Order 4668/17 Circulation 740 Subscription

VNIIPI G.CCP State Committee on Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

FIG. 2

Proofreader A. Obruchar

Claims (1)

DEVICE FOR LEVELING THE EVOLVENT PROFILE GRINDING CIRCLE WITH A DIAMOND fixed in a holder placed in a housing mounted with a possibility of swinging around an axis passing through the center of curvature of the involute profile, while the firecracker mounted on the bracket of the device coaxially to the housing axis of rotation is connected to the diamond holder by means of a mechanism for controlling the magnitude of its rectilinear movement, characterized in that, in order to improve the accuracy and productivity of dressing, the control mechanism is made in the form of wedges th transmission comprising a lever, the axis of rotation of which is housed in the housing, and a cylindrical rusk mounted in the lever with a flattened, the arm being arranged to interact with the copier almazoderzhatelem and designed as a mechanical cam. Figure 1 SU „„ 1253765 A1 1 .1253765 2