SU956174A1 - Apparatus for working cone surfaces - Google Patents

Description

(54) DEVICE FOR TREATMENT OF CONICAL SURFACES

one

The invention relates to the field of machine tools.

A device for treating tapered surfaces is known, comprising a cone with a rotary coupling, a holder with a cutter, mounted at an angle to the axis of rotation of the coupling and connected to a spindle mounted in quills. The device is equipped with a mandrel and fixed in the head of the pin. do a ram with a finger. The holder has grooves, one of which is designed to interact with the finger of the slide, and the other two are L-shaped, oppositely arranged and intended to interact with the spring-loaded retainer placed in the mandrel 1.

However, the complexity of the kinematics of the mechanism of the motive and removal of the cutter reduces the reliability of the device.

The aim of the invention is to increase the reliability of operation.

This goal is achieved by the fact that the locking mechanism of the mandrel is made in the form of a wedge, the core of which is placed in a hole made in the coupling, with the possibility of axial movement and interaction with the stem. The locking mechanism is provided with a spring buffer mounted on the wedge rod, and the mandrel is spring-loaded toward the wedge.

FIG. 1 shows a device in longitudinal section, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 3; in fig. 5 - device in the interaction of moving elements in

and extreme working position.

The device comprises a housing 1 with a pinhole 2 mounted in it and a spindle 3 with an eccentrically displaced head 4. On the guide pins 5 of the housing 1 there is a hub 6, in which in bearings

15 nodes 7 a clutch 8 is placed. A mandrel 10 is mounted on the axle of the clutch 8 on the axle 9 s. A holder 11 with a cutter 12 is mounted for axial movement in the aperture of the mandrel 10. In the upper part on the holder

- 11 transverse grooves are made, which are included in the locking plate 13 fixed on the end face of the head 4. In the hole of the coupling 8 a fixing mechanism is installed, made in the form of a rod 14 with a wedge 15 interacting with a beveled surface

the mandrel 10. On the rod 14 is installed spring buffer, made in the form of a spring 16 and washers 17 and fixed by a nut 18. The spring buffer is placed in the groove of the head 4. The mandrel 10 is tucked in the direction of the wedge 15 by a spring 19 installed in the hole of the coupling 8. Between the head 4 and clutch 8 springs 20 are placed, interacting with clutch 8 through liners 21, and a key 22 is installed. In the bore of clutch 8 there is an elastic, for example rubber, ring 23, which interacts with the rod 14 and is designed to prevent spontaneous movement of rzhn 14 under its own weight. The spring buffer is designed to compensate for the deviation between the extreme initial position of the quill 2 with the pin 3 and the rod 14 in the working position of the wedge 15.

The device works as follows.

In the initial position, the mandrel 10 is fixed by means of a wedge 15, and the sleeve 8 with the hub 6 is held by means of the elements 15, 14, 4, 3 and 2 in the upper extreme position. By turning on the drive (the drives of the spindle rotation and movement of the quill to the hell, not shown), the spindle 3 is given rotation. Through the key 22, the coupling 8 with the mandrel 10 and the holder 11 is rotated. Axial feed of the quill 2 hub 6 through the elements 3, 4; 20 and 8 moves on the rolling pins 5 by the length E up to the stop of the hub 6 in the rolls of the rollers 5. This brings the cutter 12 to the work surface of the part 24. At the moment of the stop of the hub 6, the springs 5 begin to compress the springs 20 and move the head 4 with the holder 11 relative to couplings 8, i.e. working feed cutter 12 to the length of the BI. At the end of the working stroke of the cutter 12, the end face of the rod 14 abuts against the end face of the head 4 and at length 2 of the stroke of the cutter 12, the rod 14 moves with the wedge 15, rejects the wedge 15 from the mandrel 10, rotates the mandrel 10 on the axis x

9 under the action of the spring 19 and, therefore, the removal of the cutter 12 from the surface of the part 24.

Upon return of the quill 2 with the spindle 3 to the initial position, the head 4 first moves relative to the sleeve 8. After the spring 20 is depressed, the hub 6 with the sleeve 8 begins to move. When the hub 6 stops in the body 1, the head 4 moves by another amount and tightens through the spring buffer rod 14 with a wedge 15. The mandrel 10 is rigidly fixed with the help of a wedge 15, and the cutter 12 is brought into its working position.

Thus, the device makes it possible to automate the approach of the tool to the working position before the beginning of the working stroke and retraction from the surface to be processed before the start of the reverse stroke, which increases the reliability of its operation.

Claims (1)

Invention Formula A device for treating conical surfaces, comprising a housing with a sleeve that is rotatably disposed, a tool holder mounted in a mandrel at an angle to the axis of rotation of the coupling and connected to the spindle and a locking mechanism, the mandrel being rotatably mounted, characterized in that in order to increase the reliability of work, the fixing mechanism of the mandrel is made in the form of a wedge, the core of which is placed in the hole made in the coupling, with the possibility of axial movement and interaction with the spindle, p When in use, the locking mechanism is provided with a spring buffer, a wedge mounted on the rod and the mandrel is spring-loaded in the direction of the wedge. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2935694, cl. B 23 B 5/38, 1980 (prototype). // / J 20 18 Фа2.2 6-6 S S 0U2.3 112.6