SU891249A1 - Device for boring and facing hidden surfaces of base parts - Google Patents

Description

(54) DEVICE FOR BORING AND TRIMMING OF CLOSED SURFACES OF CASE DETAILS

one

The invention relates to machining.

A device for boring and trimming closed surfaces of body parts is known, which contains a boring bar with boring and cutting blocks installed with the possibility of radial movement by interacting with a copier mounted on the borshtangi shaft, and the device for mounting the part is made in the form of a stationary table and movable in the horizontal plane of the body one.

A disadvantage of the known device is that each block has guides mounted along the radius of the borschtangi, thereby increasing the overall diameter of the device, which makes it impossible to use it when machining small holes.

The purpose of the invention is the expansion of technological capabilities.

The goal is achieved by the fact that the device is equipped with spacers mounted for movement between the base of the device and the table of the device, the latter being equipped with a mechanism for its plane-parallel movement made in the form of a crank and a rack-and-pinion gear, the gear wheel of which is mounted on the above-mentioned crankshaft, interacting with the table, and mounted on the device with the possibility of fixation.

The drawing shows the device, the overall appearance.

The device contains a borschtang 1 with a boring 2 and a scoring 3 incisors fixed on it fixed on a given

fQ size. A borschtang is installed in a pinch 4 connected with a rotational drive 5 and an axial feed drive 6. The fixture 7 for the installation of the part includes a table 8 mounted on eccentric notches 9 Krivoshchips 10 placed on them

15 shchestrennyi 11, which are associated with rails 12, made on the rods of hydraulic cylinders 13. On opposite cheeks of Krivoshchips 10, made with a displacement of 90 ° relative to the first, a tie 14 is installed.

20 A movable body 15 with cranks located in it is mounted on the base 16 of the device with the ability to move under the action of the rod 17 of the cylinder

18. On the basis of fixed hard stop

19, the brackets 20 and the cylinder 21, on the rod of which spacers 22 are fixed. A cylinder 23 is mounted on the base with the possibility of mixing during the movement of the housing 15, on the rod of which the piston 24 of the cylinder 25 mounted in the housing 15 is freely mounted.

The device works in the following way.

The spindle 4 with the drill rod 1 and the drive 5 is retracted to the leftmost position by the cylinder 6. The housing 15 is retracted to the far right position by the rod 17 of the cylinder 18. The cylinder 13, the rail 12 through the gear 11 and the eccentric necks 9 of the cranks 10 the table 8 are pressed to the brackets 20 through spacers 22, and the entire fixture is pressed against the base 16 by the cylinder rod 23. In this initial position, the part 7 is mounted and secured to the table 8. Then, the drive 5 of the vrah, the spindle 4 and the boring bar 1 is turned on, and the drive 6 is axially fed. As a result, the cutter 2 produces a bore hole. After the end of the boring, when the cutter 2 has left the hole, the cylinder 6 rests on the fixed stop 19, while the cutters 3 stop at a strictly defined position relative to the part 7. After that, the cylinder 23 releases the fixture, and the pressure in the cylinder 25 raises the piston 24 and, on table 8, secures it with respect to housing 15. Then with rod 17 of cylinder 18, housing 15 moves to the left. In doing so, the cutters 3 cut into the wall of the hole to a predetermined size.

After the embedding is completed, the pressure in the cylinder 25 is released, and the housing 15 is clamped at the base 16 by the stem 17 of the cylinder 18. Next, table 8 with part 7 is attached to a plane-parallel circumferential movement around the boring bar 1. At the beginning of the movement of the table 8 by the cylinder 21 spacers

22 is withdrawn from the gap between the table 8 and the brackets 20 and the part can make a full revolution around the boring bar 1, and the cutters in this case process annular grooves in the part at a predetermined distance from each other. When machining the grooves with the cutters 3, the stitch 14 synchronizes the rotation of the cranks 10. Then the device is reset and the part is replaced.

The invention allows the machining of holes of various diameters and the machining of a part with several closely spaced holes by setting the appropriate number of spindles with boring bars without changing the device.

Claims (1)

Invention Formula A device for boring and trimming the enclosed surfaces of body parts, comprising a boring bar with boring and cutting cutters and a device for mounting a part, carrying a table and mounted for movement in a horizontal plane, characterized in that, in order to expand technological capabilities, the device is equipped with spacers installed movably between the base of the device and the table of the device, the latter being equipped with a mechanism for its plane-parallel movement, you filled in the form of a crank and a rack-and-pinion gear, the gear wheel of which is fixed on the said crank, interacting with the table, which is mounted on the fixture with the possibility of fixation. Sources of information taken into account in the examination 1. USSR author's certificate number 548382. cl. B 23 B 29/034, 1975.