SU891255A1 - Apparatus for working shafts with "equiaxle-shape" profile - Google Patents

Description

(54) DEVICE FOR TREATMENT OF SHAFTS WITH THE PROFILE "EQUAL CONTOUR

one

The invention relates to the machine tool industry and can be used in the processing of high-precision shafts with an equiaxial contour ("RK - profile shafts"), mandrels and tools (sewing, firmware, tap-less taps, chisels, mandrels, etc.) .. 5

Devices for processing shafts with a profile "equiaxial contour" are known, including a carriage mounted with transverse displacement, which due to the rectilinear slide is connected with a curved disk rigidly mounted on the drive shaft 1.

The disadvantages of the known devices are:

the presence of a long kinematic chain of shaping, the manufacturing error of the laziness and assembly of the elements of which will affect the accuracy obtained during the processing of the RK profile;

the need for a set of precise interchangeable elements of gears to match the rotation of the product to the number of double 20 strokes of the carriage of the mechanism of the formation of eccentricity (setting to the number N of faces of the "RK -11 profile shaft);

the inability to continuously adjust the forming chain i.

The purpose of the invention is to increase the processing accuracy and simplify the design.

The goal is achieved by the fact that the 4TO device is equipped with a rolling disk and connected to it by means of flexible tapes inserted into the device, installed with the possibility of reciprocating movement of the second carriage, the device being equipped with a second crank disk connected by means of adjustment by the second crank disk connected by means of the second linear curtain introduced with the second carriage.

The fingers of the first and second crank disks are located in the same diametral plane.

FIG. 1 shows a diagram of the machine in plan; in fig. 2 - end view; in fig. 3 - stages of forming profile sections.

Claims (2)

The device includes a table 1, on the guides 2 and 3 of which the carriage 4 of the eccentricity forming mechanism is located, and on the guides 5 - the carriage 6 of forming the angle of rotation of the product. The carriage 4 is equipped with a spindle 7 with a fixed disk 8 fixed on it and the shaft 9 to be machined. The disk 8 is rigidly connected to the carriage 6 by means of flexible tension bands 10 and 11. On the table 1 there is a drive shaft 12 with two crank disks 13 fixed on it 14, which, by means of fingers 15 and 16 arranged in the same diametral plane, with adjustable eccentricities, interact, respectively, via rocker grooves 17 and 18, with carriages 4 and 6. The drive shaft 12 is connected to the movement source 19 by an external kinematic chain i. Tools 20 and 21 are mounted on separate spindles x housed in housings 22 and 23 and have an individual drive (not shown). The tool ends 20 and 21 are located in planes parallel to the axis of the ground shaft 9 and perpendicular to the direction of the harmonic reciprocating movements of the shaft 9. The proposed device works in a similar way. From the source 19 of movement along the external kinematic chain io, the movement is transmitted to the drive shaft 12 and further, via the crank disks 13 and 14, respectively, the fingers 15 and 16, through the rocker slots 1 and 18 is converted into harmonic reciprocating mixes P and G12 of the carriages 4 and 6. When the HI carriage 4 moves, the spindle 7 with the disk m 8 fixed on it and the product 9 move progressively along with it, which through the belts 10 and 1 1 receive the corresponding rotational component B of the shaping motion (Fig. 2). Movement P2 of the carriage 6 with the help of belts 10 and 11 through the rolling disc 8 tells product 9 to complement .1 the second rotation. Cm. As a result of summing all the movements, the profile of the equiaxial shaft will be formed. The removal of the allowance over the diameter of the shaft 9 is ensured by supplying the approach of the tools 20 and 21 perpendicularly to the axis of the shaft 9 until a given value D of the equiaxial shaft is obtained. Processing the profile along the length is carried out due to the relative movement of the product 9 - tools 20 and 21 carry out the movement P. along the product axis. After processing the sections 1-2 and 1 2 (Fig. 3) of the equiaxial profile to the specified size, tools are retracted from the shaft ( along or upward from it), the disconnection of the obkatny disk and shpinddel 7 and spindle 7 with item 9 is rotated ot 360 ° / 2N using a separating disk fixed to the spindle (not shown), after which the processing is repeated. The device is configured as follows. The stroke of the carriage 4 of the eccentricity formation mechanism is set equal to twice the value of the eccentricity 2e of the RK-profile shaft and is adjusted by shifting the finger 15 to a distance e, e relative to the axis of the drive shaft 12. At the same time, the spinning disk 8, and with it the spindle 7 and product 9, get a turn on the angle of 360 ° - 2E 5t (D - "- a) where e is the value of the eccentricity" RK profile, mm; D - diameter obkatny disk. Mm; 5 tape thickness, m. The stroke H of the carriage 6 forming an angle of rotation of the product provides an additional twist of the product by an angle lb S60 ° -H) where H 2e2 is the stroke of the carriage 6 forming the angle of rotation of the product; ej is the eccentricity value of the finger 16 of the second crank disk 14. To obtain the specified "RC-profile, the product must turn through an angle of 360 ° / 2N (where N 3, 5, 7, ..., is the number of faces of an equiaxial shaft) equal to the sum of the angles ot, and 1 GySS- -) 2N from where I (rh-b) e S l -, - "tN The invention will improve the accuracy of manufacturing shafts with the" RK-profile, simplify the kinematics and adjustment of profile-grinding device, as well as reduce the cost of manufacturing the last . Claim 1. A device for treating shafts with a profile "equiaxial contour, including a transversely mounted carriage that is connected with a crank disk rigidly fixed to a drive shaft by means of a backstage, in order to improve processing accuracy and simplify the design, the device is equipped with a rolling disk and connected to it by means of flexible tapes inserted into the device, installed with the possibility of reciprocating movement of the second carriage, The vehicle is provided with a second crank disk located on the drive shaft, which is adjustable by means of an inserted second slide with the second carriage. 2. A device according to claim 1, characterized in that the fingers of the first and second curved spines are located in the same diametral plane. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 663502, cl. B 23 C 3/08, 1976. ////// FIG. 2 20 Disk Fig.Z