RU1799694C - Drilling device - Google Patents

Abstract

Use: in metalworking for deep hole machining. SUMMARY OF THE INVENTION: A conductive sleeve is mounted in a movable housing. Elements are made in the housing, which make it possible to fix it on the workpiece. The guide hole of the conductor sleeve is stepped. The large diameter hole is designed to interact with the tool guide. On the side of the hole of a smaller diameter, a spring is placed between the end of the sleeve and the bottom of the housing, which compresses the sleeve to the end of the workpiece. The magnitude of the longitudinal movement of the sleeve relative to the housing should be equal to 1.1 ... 1.3 of the length of the cutting teeth of the tool, which ensures the complete exit of the cutting part and the tool from the machined hole. 3 ill.

Description

ate

WITH

The invention relates to metal working and can be used for. processing of holes by stretching and countersinking of deep holes.

The aim of the invention is to increase the accuracy of hole machining during deep drilling.

In FIG. 1 shows a device for drilling holes; in FIG. 2 is a diagram of the alignment of the device when installing it on the workpiece; in FIG. 3 is a diagram of a method implemented by this device.

The device consists of a housing 1, a conductive sleeve 2 and a mount assembly of the housing 1 on the workpiece 3. Inside the housing 1, a through step hole A. is made.

The first step of the opening A of the housing 1 is designed to connect the housing 1 with the workpiece 3. The gap between the opening of the housing 1 and the workpiece 3 allows the device to be installed coaxially with the output end of the machined hole in the presence of a bore axis of 2.5 mm.

The second stage of the hole A of the housing 1 is designed to accommodate the conductive sleeve 2, which eliminates damage to the housing 1 by the countersink 4 when the latter leaves the machined hole. The outer diameter of the conductor sleeve 2 is selected so as to ensure that the movement fits in the housing 13. The inner hole B of the conductor sleeve 2 is stepped. The part of the hole of the conductive sleeve 2 in contact with the end face of the workpiece 3 and designed to guide the countersink 4 when it leaves the work hole, has a diameter and a length equal to the length of the front guide sleeve 5 of the countersink

Xi

Oh Yu Oh

h

AND

4. The second part of the stepped hole In the conductor sleeve 2 is made with a diameter of mm, providing free passage of the stems 6. The outer part of the conductor sleeve 2 from the side of the smaller inner diameter is machined to a diameter that accommodates the spring, which in the process compresses the conductor sleeve 2 to the end face of the workpiece 3 The length of the machined part of the conductive sleeve 2 ensures that this part of the sleeve 2 extends beyond the housing 1 with the spring fully compressed.

The third step of the hole A of the housing 1 is made with a diameter that provides free passage of the machined part of the conductor bush 2 on one side and, on the other hand, serves as an end stop for the spring 7. The maximum longitudinal movement of the conductor bush 2 (until the spring is completely compressed) is selected from the condition complete exit of the cutting part 8 of the countersink 4 from the machined hole.

To improve serviceability, a contrast mark is applied to the machined part of the conductive sleeve 2, protruding beyond the end of the housing 1 with the spring 7 fully compressed, for example, in the form of a strip 10, applied around the sleeve 2 with red paint.

In order to increase the automation of the process of boring a deep hole, the end face of the protruding part of the conductor sleeve 2 is made in the form of a stop 11 for contact with the limit switch 12.

To ensure alignment of the conductor sleeve 2 with the outlet, the portion of the hole to be worked, before placing the device on the workpiece 3 in the hole, the mounting rod 13 is inserted into the conductor sleeve 2, then the device is mounted on the workpiece 3, allowing the parts of the mounting rod 13 to protrude from the conductor sleeve 2 into the machined hole and the stop of the housing 1 at the end face of the workpiece 3. In this position, the device is fixed on the workpiece 3. The mount is made in the form of four evenly spaced around the circumference awns. cams 14.

The workpiece 3 is installed on the machine with one end in the four-jaw chuck 1b of the headstock 16, and the other in the rest 17. The stem 6 is installed in the feed carriage 18 and inserted into the hole of the conductor device and then into the hole to be machined, pushing the mounting rod 13. Through the window of the cartridge 15 remove the installation rod 13 and

screw the countersink 4. onto the stem 6. By moving the feed carriage 18 with the stem 6, the front guide bush 5 of the countersink 4 is inserted into the hole to be machined.

The coolant is turned on, which under pressure enters through the internal cavities of the stem 6 and the countersink 4 and the openings of the countersink body 4 to the cutting blades of the countersink 4.

Turn on the rotation of the workpiece 3 and the working feed of the countersink 4.

During countersinking, the chips generated from the chip are removed along with the coolant from the zone

cutting and enters the cavity of the cartridge 15. At the end of the hole processing, the front guide sleeve 5 of the countersink 4 leaves the hole to be machined and enters the hole B of the sleeve 2.

the hole in the conductor sleeve 2 is aligned with the output end of the hole to be machined and has the same diameter as the hole to be machined - the base of the core drill 4 is maintained until the cutting blades of the core drill 4 exit the hole to be machined.

When the front guide sleeve 5 of the vertical drill 4 enters the hole B of the conductive sleeve 2 along its entire length (20 mm), the end face

of the front guide sleeve 5 abuts against the step of the hole B of the conductive sleeve 2. With further movement of the countersink 4, the conductive sleeve 2 moves with it, compressing the spring 7. Full exit

the cutting part 8 of the countersink 4 coincides with the output of the machined part of the conductor sleeve 2 with the contrast mark 10 applied to it for the end of the housing 1. The appearance of the contrast mark 10 is a signal to turn off the supply of the tool,

The supply of the tool can be turned off automatically when the stop 11 of the sleeve 2 contacts the limit switch 12.

After stopping the supply of the tool turn off the rotation of the workpiece 3 and coolant. Unscrew the cams 14 of the conductor device, remove the conductor device from the workpiece 3, unscrew the countersink

4 with stem 6.

Claims (1)

SUMMARY OF THE INVENTION A device for drilling holes, in the case of which a bush with a guide hole is movably mounted, characterized in that, in order to improve the accuracy of hole machining during deep drilling, the device is equipped with fastening elements of the device body on the workpiece and a spring, wherein the guide hole of the junction sleeve is stepped, and the hole with a large diameter is designed to interact with Figure 1 g A f 1 7 f I 10s / / Ii I I S X / 3 e UUShShshch (g B ../. tool guiding element, and the spring is placed in the housing between the bottom of the housing and the end of the conductor sleeve from the side of the hole of smaller diameter. / 3 Figs