SU654357A2 - Diamond-boring machine - Google Patents

Description

no traffic jams; in fig. 8 - the scheme to the conclusion of the calculation formula.

On the guides of the bed 1 lies a table 2 connected with the hydraulic cylinder 3 of the longitudinal feed. Rests 4 and 5, mounted on the frame, limit the movement of the table in both directions.

A bridge 6 is also fixed on the frame, carrying the spindle heads 7 with devices (cartridges) 8 for fastening the parts to be machined: the bodies 9, the crane and the plugs 10. The spindle heads are installed so that the axis of the spindle rotation is rotated relative to the direction of the longitudinal table feed angle a, equal to half the angle of the processed cone.

A motor drive And, mounted on bridge 6, is connected with shpinindles via belt gears 12, 13.

A base 14 with a three-position hydraulic cylinder 15 is mounted on the mirror of the table 2. The pistons 16 and 17 are located in the casing. At the left end of the stepped brush 18 connected to the piston 16, there is a tool holder 19 for boring the casing, at the right end there is an adjustable retaining ring 20 for setting length / cylindrical groove.

The normal 17, which is a movable stop, is sealed in the hydraulic cylinder 15 and along the shaft 18. The diameter of the shaft 17 is larger than the diameter of the shaft 16, the diameter of the left side of the shaft 18 is larger than the diameter of the right side. The cavities of the hydraulic cylinder 15 are closed by flaps 21 and 22.

A hydraulic cylinder 23 with a piston 24 is also installed on the base 14, the tool holder 25 is fixed on the left end of the brush stem for turning the plug, and the stop ring 26 on the right end. The cavities of the hydraulic cylinder 23 are closed by flaps 27 and 28.

The tool holders 19 and 25 are set at an angle a to the direction of the longitudinal feed of the table, i.e. parallel to the axis of rotation of each spindle.

The movement of the table 2, the tool holders 19 and 25, as well as the rotation of the spindle heads 7, is controlled by cams 29 acting on the path switches (not shown) and stop rings 20 and 26 interacting with the limit switches 30, 31 and 32 .

All movements in the machine are hydraulically driven.

The left cavity 33 of the hydraulic cylinder 15 is connected to a pressure line 34 directly connected to the pump. A spool 35 connected to the two cavities of the hydraulic cylinder 23 and to the right-hand cavity 36 of the hydraulic cylinder 15 is connected to the same line. The main line 37 is connected to a drain. , Middle cavity 38 hydraulic cylinders 15

by means of a pressure slide valve 39, throttles 40 and a check valve 41, is connected to the throat cavity 42 of the hydraulic cylinder 3 of the longitudinal table feed 2. The highway 43, as well as the highway 45 connected to the piston cavity 44, is connected to the table motion control panel 2 (not shown ). Works machine as follows.

When the work cycle is switched on, the table 2 with the tool holders moves in an accelerated manner to the left. The tool holder 19 is at the same time in the position of the beginning of the axial feed defined by the movable stop

17, since the cavities 33 and 36 of the hydraulic cylinders 15 are under pressure, and the pressure slide valve 39 cuts off the cavity 38 from the splitting cavity 42. The tool holder 25 is pressed against the end face of the lid 27, since the left cavity

hydraulic cylinder 23 is connected to the pressure line, and the right to drain.

At the end of the accelerated stroke, one of the cams 29 acts on the track switch, issuing a command to switch on

longitudinal table feed (IPP) and spindle rotation. In addition, each cutter treats a conical surface moving along a generatrix of a cone parallel to the direction of longitudinal feed.

After stopping the table in position on the support 4, the pressure in the cavity 42 of the hydraulic cylinder 3 rises, and the oil flows through the pressure slide valve 39 into the cavity 38 of the hydraulic cylinder 15. Since it is effective

the area of the cavity 38 is larger than the cavity 33, the piston 16 with the rod 18 and the tool holder 19 is moved relative to the table to the left along the axis of rotation Schnindel, carried out axial feed (PR.P.) on the length / cylindrical groove in the body 9 of the crane. This length is limited by a stop ring 20 interacting with the end face of the cover 22. In this position, the protrusion of the ring 20 presses the limit switch 30, issuing a command to stop the rotation of the spindles, connect the discharge of both cavities of the hydraulic cylinder 3 and switch the spool 35. As a result, the cavity

36 and 38 of the hydraulic cylinders 15 are connected to a drain, the piston 16 moves at an accelerated speed to the right, the movable stop 17 moves, and stops in a fixed position outside the axial feed portion,

pass the way 1 + K. This position, determined by the contact of the back end of the tool holder 19 with the outer end of the cover 21, is accompanied by the action of the protrusion of the ring 20 on the limit switch 31.

At the same time, the direction of oil supply to the cavity of the hydraulic cylinder 23 is changed, as a result of which the piston 24 moves the tool holder 25 forward until it stops against the ring 26 into the end face of the lid 28. The ring 26 presses

Claims (1)

to the limit switch 32, the switches 31 and 32 issue a command to apply pressure to the cavity 44 of the hydraulic cylinder 3, i.e., to accelerate the movement of the table 2 with the tool holders to the right. Since the toolholder 19 is outside the axial feed section and is displaced by K relative to the position of the same tool holder at the beginning of the axial feed section (the cone is bored at this position of the tool holder), the tool tip does not contact the machined surface cone and does not spoil its risk. The tip of the turning tool also does not damage the surface of the cone of the plug, since the tool holder 25 is pushed forward relative to the position in which the turning occurred. The gaps between the tops of both incisors and the machined surfaces make it possible to start the accelerated movement of the table to the right, not waiting for the spindles to completely stop. Table 2 stops in the initial position - on the support 5, and one of the cams 29 acts on the initial position switch, issued a command to connect both cavities of the hydraulic cylinder 3 to drain and switch the spool 35. Under pressure from the oil supplied to the cavity 36 of the hydraulic cylinder 15, the movable stop 17 mixes the piston 16 with the tool holder 19 to the left by the value K, sets the tool holder to the position corresponding to the processing of the cone and the beginning of the axial feed section. By the pressure applied to the left cavity of the hydraulic cylinder 23, the tool holder 25 is moved to the working position determined by its contact with the outer end face of the cover 27. This completes the cycle of the machine. When choosing the value of K, the gap between the apex and the machined surface of the cone, measured along the normal to the machined surface, should be no less than the maximum value of Utah elastic squeezing of the technological system AIDS when boring the cone: when removing the tool, the tool holder 19 moves under angle a to the direction of the generatrix of the cone along which boring occurs. b From FIG. 8 that after the substitution of the gap value in expression (2) and the correc tion (1), we finally obtain a similar formula can be used to calculate the / Ci displacement of the toolholder 25. The stiffness of the aids system during boring is mainly determined by the stiffness of the toolholder 19, limited by the internal dimensions of the valve body. Since the tool holder 25 is outside the cork being machined, its dimensions can provide a sufficiently high rigidity of the system. Therefore, it is possible to achieve by constructive means that the elastic pressures of the AIDS system during turning are many times smaller than during boring. Accordingly, the possible depth of the risks in the withdrawal of the cutter will be significantly less on the cork than on the cone of the body. This allows, in a number of cases, to be limited to the described device only for the toolholder 19, by making the toolholder 25 stationary. The invention of the diamond boring machine according to ed. St. No. 529012, characterized in that, in order to exclude the formation of risks on the surface of the cone from the withdrawal of the boring tool and increase productivity, an additional power body, kinematically associated with the tool holder (tool holders) for boring the housing, is provided with an additional piston that serves as an emphasis positioning the toolholder in the position of the bore of the cone and the beginning of the axial feed section, spaced from the toolholder position located outside the said section at the end of its accelerated retraction to the distance ii - Kn ah ah - the greatest technological AIDS forced off system when boring cone; a-half the angle of the cone. / U lif :: - nrJ; 11 10 12 ig. one i 2S 27 23 Zi- 28 32 2B 13 FIG. Ip.n. -T start 1 / -L Stop at 6 Start Stop