SU1442331A1 - Mandrel - Google Patents

Abstract

The invention relates to the field of metalworking and can be used for securing parts on metal-cutting machines. The purpose of the invention is to expand the technological capabilities of the mandrel by providing machining of the part in outer diameter and face. In case 1, ha 2 and additional ha 3 with collar 4 are placed. In the guiding grooves of case 1, there are crackers 5 with 6 clamping elements 7 mounted on the axes. Cams 21 are installed in holes of housing 1 and in contact with inclined surfaces 22 2. Segments 12 are fixed on the surface of flexible bands 14, which move on the reels 18. The tapes are attached to the slider 15 mounted on the collar 4 with additional 3. When moving the crackers 5, the clamping elements 7 interact with the inclined surface of the segments 12, the center Item 33 is attached and secured to the base hole. At the same time, the movement of the gigi 2 and uncoupling of the cams 21 occurs. The part is fastened in two sections. 8 Il. with (L

Description

9u.i1

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The invention relates to the field of metalworking and can be used for securing parts on metal cutting machines.

The purpose of the invention is to expand the technological capabilities of the mandrel by providing machining of the part in outer diameter and face.

Figure 1 presents the mandrel, a General view in section; figure 2 - section aa in figure 1; on fig.Z - section. BB in Figure 1; figure 4 - node 1 in figure 1; on fig.Z - section bb In figure 4 on figure 6 - section dG in figure 4; Fig. 7 shows the position of the clamping jaw during installation-removal of the workpiece; on Fig - the position of the cam for

Tali 33 working. (mineral

press when fixing parts.

The mandrel comprises a housing 1, in cent- 20 oil) is fed under pressure in a pore orifice, of which the cylinder bore 29 is located. The hydraulic hollow body is ha 2, inside which, from the cylinder 25, begins to move with the possibility of movement, an additional 3 ha is located with the shoulder 4. Boxes 5 are installed in the guide slots of the body 1 on its outer surface. In the grooves of the crackers 5 on the axis x 6, the rotary clamping elements 7 of the first clamping stage are installed, the clamping elements 7 are preloaded on both sides by flat springs 8 and 9 (figure 4), moreover the springs) 9 are more rigid than the springs 8. Sealing rubber

thirty

to the left (of FIG. 1) through the flange bushing 26 and the studs 27 displaces in

25 in the same direction of the crackers 5. The clamping elements 7, which took up the position shown in Fig. 7 before being mounted on the mandrel of the workpiece 33, under the action of the spring 9 supported on the tape 14, and due to their higher rigidity, overcoming the force of the spring 8, occupy the position , shown in figure 4. Resting against the face of the part 33, the clamping elements 7 move it to the left, pressing it against the supporting base mountaineer of the housing I of the frame. When it reaches: with the detail 33 of the thrust end of the case, the force on the clamping elements increases, and.

25 cops 7 move it to the left, pressing it against the stubborn base mountaineer of the body I of the mandrel. When it reaches: with the detail 33 of the thrust end of the case, the force on the clamping elements increases, and.

the rod 10 protects the cavity of the crackers 5 from contamination. The working surfaces 11 of the clamping elements 7 are described in an arc to ensure their contact with the inclined surface of the segments 12 and have rounding 13. Seg-40 having overcome the force of the springs 9, they 12 are rigidly connected with the flexible flap about the axes 6 along that 14 (Fig. 4), attached to a half-hour hand and moving in the base pinch 15, having the possibility of re-opening of the part 3. Moving the distance in the opening of the bead 4 is further left along with the breadcrumbs 5 3 with the help of the regulation-45 rounding 13 in Holes in contact with the naval oil in Inta 16. The screw 16 is fixed by a semicircular stop 17. Each of the three tapes 14 has a similar fastening device.

The tapes 4 are located on each of two reels 18, which have the possibility of rotation on the needle rollers 19 relative to the axes 20 mounted in the recesses of the housing 1.

The cams 21 are placed in the radial holes of the housing 1 and are supported on inclined surfaces 22 located 120 tons per ton 2, the surfaces 22 are opposite the windows 23 made by BJ collar 4. The cams 21 are enclosed by a collet spring 24. The cylinder 25 body through the flan - a bush bushing 26 and studs 27 are rigidly connected to the croutons 5. The hydraulic cylinder piston 28 is fixed to t 2. The working medium can be fed into the hydraulic cylinder cavities 29 and 30. In the cavity 30, a spring 31 is placed. From the end, the body 1 of the mandrel is closed by a clamp 32. The position 33 denotes a fixed blank.

The mandrel works as follows.

After installation of the fixed part 33 working. (mineral

oil) is fed under pressure into the cavity 29 of the hydraulic cylinder. The body of the hydraulic cylinder 25 begins to move

oil) is fed under pressure into the cavity 29 of the hydraulic cylinder. The body of the hydraulic cylinder 25 begins to move

to the left (of FIG. 1) through the flange bushing 26 and the studs 27 displaces in

the same direction of the crackers 5. The clamping elements 7, which occupied the position shown in Fig.7, under the action of the spring 9 supported on the tape 14, and due to their higher rigidity, overcoming the force of the spring 8, took up the position , shown in figure 4. Resting against the face surface of the part 33, the clamping elements 7 move it to the left, pressing against the thrust base mountaineer of the body I of the mandrel. When it reaches: with the detail 33 of the thrust end of the case, the force on the clamping elements increases, and.

overcoming the force of the springs 9, they rotate about the axes 6 clockwise and move into the base hole of the part 3. Moving further to the left together with the breadcrumbs 5 they are rounding 13 into X and t into contact with the inclined surface of the segments 12 and Sliding over this surface is rotated counterclockwise, the centering and fastened, part 33 in certain sections (Fig. 8). Simultaneously, the piston 28 of the hydraulic cylinder with the thrust 2 moves to the right, the cams 21 spinning, fixing the part 33 in a different section. Due to a certain stiffness: the O-ring Spring 24, the activation of the piston 28 of the hydraulic cylinder occurs with some delay compared to the body 25 of the cylinder.

The distance along the axis of the fixed part 33 between the clamping elements 7 and the cams 21 can be set to any necessary, regardless of the length of the part 33. To adjust the specified distance from the control system of the machine with a special drive (not shown), the additional pull 3 is mixed. moving it to the left, the distance between the clamp rows increases, and when moving to the right it decreases.

The accuracy of the centering of the part 33 by the clamping elements 7 depends largely on how precisely the pressure segments 1 are located relative to each other. In the design of the mandrel it is possible to adjust their relative position. To do this with. The removed cover 32 uses a screwdriver to turn the adjusting screw 16. The slider 15 moves the tape 14 and the pressure segment 12 rigidly connected with it.

To remove the machined part 33 from the mandrel, the pressurized oil is supplied to the cavity 30 of the hydrocyles. 25 cylinder housing when moving to the right

moves the sleeve 26 in the same direction, and through the studs 27. and crackers 5 s

the clamping elements 7 fastening parts 33,

happens

five

0

0

Claims (1)

Invention Formula The mandrel, in the case of which is mounted, is equipped with an inclined element designed to interact with the cams, and clamping elements designed to interact with an additional thrust, which differs from that in order to expand the technological capabilities by providing processing. the details on the outer diameter and the end of the mandrel are provided with pivot drums located in the housing, segments closed by flexible tapes and installed with the possibility of adjusting movements relative to the additional t and polzushkami, wherein the flexible belt 5 mounted on the rotary drum and fixed to polzushkah, and segments - in the surface of the flexible bands and intended for cooperating with the clamping elements. 9i, yy 21 21 9ag.5 y / 7777/7 // 77 /// $$ SN mi 5 12 .five in-in one i19 W -P fP (iz.6 ten agl 9 (lg.8