SU1816668A1 - Knurling capstan - Google Patents

Description

The invention relates to mechanical engineering and instrument making and can be used for straightening the RPM shafts, their usual rolling and combined processing (rolling with simultaneous PPD straightening).

The purpose of the invention is to improve processing productivity and expand the technological capabilities of the head.

Figure 1 shows the knurling head in section with a horizontal plane passing through the axes of the part and the knurling roller; figure 2 is a section a-a in figure 1; in Fig. 3 and 4 - schemes of shaft processing.

An example of a specific implementation.

The knurled head (Fig. 1, 2) contains a knurling roller 1 mounted on an axis 2, which rests on bearings 3 mounted in the holes of the fork 4. Two plates 5 are attached to the ends of the fork 4, into the holes of which the axes 6 and 7 are pressed. rest on bearings 8, installed in the holes of the holder 9, in which a rectangular through groove is made 10. At the free end of the axis 7 is fixed 5 to the gear 11. The 0-0 axis runs tangentially. close to the working surface of roller 1 in the middle of its width. ... ζ

In Fig.Z shows a schematic diagram of the installation, which used the proposed objects. The workpiece 12 is installed in the centers of the lathe. It is in contact with the probe of the sensor 13, which is connected to the stepper motor control unit (MSU) 14. The latter is connected to the stepper motor (SM) 15. On the output shaft of the SM, a gear is mounted which meshes with the gear 11 (Fig. 2) of the knurled head. (Sensor 13, BUSHD 14 and SHD 15 together represent a feedback loop of the angular position of the fork 4 with the position of the bending plane of the shaft 12 to be processed).

Details 12 report rotation. The sensor generates a signal and sends it to

BUSHD 14, which, depending on the value and sign of the signal from the sensor 12, generates a command and transmits it to the SM 15. The last

IV 8999181 turns through gear 11 (figure 2). plug 4 together with the roller 1 to position I: or I (Fig. 3.4). When the part 12 turns to the roller with its concave surface, the SD 15 turns the fork 4 with the roller 1 to position I (Fig. 3). When the part turns to the roller with its convex side, it goes to position II (Fig. 4). The knurled head is brought in until the roller 1 touches the part 12, loaded with force P and the head is fed along the generatrix of the shaft 12. Simultaneously with the rolling of the surface of the shaft, the process of its straightening is carried out strictly in the plane of its bending.

If during processing the shaft 12 is completely straightened, the sensor 13 generates a signal for the absence of beating and the SM 15 with the continuous rotation of the shaft 12 fixes one of the two positions of the fork 4 with the roller 1 I or II, depending on the required depth of work hardening. Therefore, then the usual uniform roll of the shaft is carried out over its entire surface. In this case, the previously achieved straightness of its axis is not violated.

Thus, the process of machining the part goes on continuously, without reinstalling the part or tool, which increases the processing productivity and facilitates the use of the proposed head and roller in automatic production.

It also follows from the above that if the shaft 12 has a non-straight generatrix. then it can also be processed using this head in any way:

a) normal rolling in the position of the roller I or II (Fig. 3.4);

b) combined processing (rolling with simultaneous straightening).

The technological capabilities of the head are expanding.

The advantages of the invention over the prototype:

processing performance increases, because the part does not need to be reinstalled during processing;

expanding technological capabilities, because it is possible to process shafts with both straight and curved generatrices;

it becomes possible to process shafts in automatic production on automatic lines, in flexible production systems, on PMG.

Claims (1)

Claim A knurling head containing a knurling roller mounted for rotation in a fork, which is placed in a holder, characterized in that, in order to increase productivity and expand technological capabilities, it is equipped with a feedback loop, a turn in the holder is mounted with the possibility of forced rotation in a plane, passing through the axis of rotation of the roller, by means of a feedback loop made in the form of a probe, mounted with the possibility of interacting with the workpiece and connected through a control unit with a stepping motor. FIG. 1 A-A