SU1366317A1 - Arrangement for drilling - Google Patents

Abstract

The invention relates to the field of machine tools and can be used in flexible machine tools as a guide device for axial tools such as drills, countersinks and reamers, as well as boring bars. The aim of the invention is the expansion of technological capabilities by providing a backlash-free direction for tools of various diameters. The device contains spring-loaded cylindrical rollers 6 mounted on bearings at an angle to the axis of the tool 5. The conical surfaces of the rollers 6 form a gap for guiding the tool 5, and the spherical surfaces are in contact with the cam 8. Between the end of the spring 12 and the nut 13 are axially displaced to install the bushing 16. The end of the sleeve interacts with an adjustable stop. 17 placed on the pinhole drilling head or machine, which through the spring 12 acts on the copier 8, which in turn moves the rollers 6 all the way into the tool 5, thereby forming a backlash-free connection tool. ment - sleeve. 2 hp f-ly, 10 ill. S (/)

Description

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The invention relates to machine building and can be used in flexible machine systems as a guide device for axial tools such as drills, countersinks and reamers, as well as boring bars of boring machines.

The aim of the invention is the expansion of technological capabilities by providing a backlash-free direction for tools of various diameters.

Figure 1 shows the device, a longitudinal section; in fig. 2 - device when centering a tool of minimum diameter, bottom view; in fig. 3 - the same, when centering the tool of maximum diameter, bottom view; in fig. 4 - a device with an automatic adjustment mechanism for different tool diameters in multi-pass machining from versions, longitudinal section; in fig. 5 - the device operating according to the program, top view; in fig. 6 shows section A-A in FIG. in fig. 7 is a section BB in FIG. 5 (with the image of the device to turn the copier); in fig. 8 is a section bb of FIG. 5 (with the image of the initial position of the field of the roller turning the copier); in fig. 9 - section G-Y in FIG. 5 (with the image of the final position of the half a wand; in Fig. 10 - a section dD in Fig. 6 (working profile of an interchangeable cam placed on a cam).

The drilling device (FNG1) consists of a body 1, in cylindrical bores of which, by means of balls 2, smooth rings 3 and threaded rings 4, cylindrical rollers 6 are placed at an angle to the axis of the tool 5 and are capable of axial movement. At one ends of the rollers 6 are made tapered surfaces, the gap between them forms the direction for the tools 5 (Fig. 2 and 3). The spherical surfaces are made at the other ends of the rollers. The angle of inclination of the rollers 6 is chosen taking into account the reverse taper of the tool 5, and the length of the forming cone of the roller - taking into account the pitch of the spiral of the tool. The rollers 6 are spring-loaded relative to the housing 1 by the springs 7 to the inner conical part of the copier 8. The copier, by means of the balls 9 and the rings 10 and 11, is backlessly mounted on the cylindrical 172

The body 1 is axially displaceable and spring-loaded axially with spring 12 relative to the adjusting nut 13. The diameter of the central opening of the body 1 must be larger than the outer diameter of the cartridge 14. To prevent shavings and coolant from entering the cavity of the sleeve, rubber rings 15 are installed in the housing bores. .

The device works as follows.

The required tool 5 fixed in the chuck 14 is inserted into the gap formed by the conical surfaces of the rollers 6. Then, turning the nut 13 clockwise through the spring 12 and the copier 8, move the rollers 6, selecting the gap in the pair of tool-bushing. With the introduction of the tool 5, the rollers 6 are driven into rotation, forming a gapless connection, which improves the hole machining accuracy. The threaded rings 4 and 11 allow adjustment of the roller bearings of the rollers 6 and the copier 8.

When replacing the tool 5, it is necessary to release the copier 8 axially by rotating the nut 13. At the same time, after releasing the tool 5, the rollers 6 move under the action of the springs 7, lifting the copier 8. This allows the tool to be freely removed from the sleeve and replaced.

The drilling device (Fig. 4) can be automatically tuned to different tool diameters for multi-pass machining of the holes. For the cylindrical part of the housing 1, instead of the cup spring 12, a compression spring 12 is installed. A pressure sleeve 16 is axially displaced between the end of the spring 12 and the nut 13. The pressure sleeve 16 contacts the end of this sleeve with the quill head of the multi-position machine or CNC machine.

The number of stops 17 is equal to the number of working spindles of the machine or head

The device works as follows.

The location of the stop 17 on the pinhole heads is chosen in such a way that at first the tool 5 must freely enter the gap formed

the conical surfaces of the rollers 6, do not touch the workpiece. Then the stop 17, acting through the pressure sleeve 16, the spring 12 on the copier 8, must move the rollers 6 all the way into the tool 5, thereby forming a backlash-free connection between the tool and the sleeve. Only then should the hole be machined.

After the hole has been processed, the quill returns to its original position. Together with it, the spring bushing 16, the spring 12, the copier 8 and the rollers 6 return the tool 7, freeing the tool 5. Then, turning, for example, the drilling head, the second spindle with another tool is positioned in position and the machining cycle repeats.

The device for drilling (Figs. 5-7) can provide work according to the program: adjustment to the required diameter of the tool; tool clearance during hole machining; removal of the sleeve (rollers), without stopping the treatment process; setting to the next diameter size, without stopping the process.

For this purpose, the device is equipped with a mechanism for adjusting the internal diameter of the rollers, which consists of a device for turning the copier 8 and a device for selecting a gap in the mating bushing-tool. The device for turning the copier 8 is made asymmetrically placed in the grooves of the cylindrical part of the body 1 (figs, 6 and 7) of two sliders 18. With the springs 19 (fig, 7), the sliders are spring-loaded relative to the body and fitted at the ends with wedges ), Under the wedge of the sliders in the cam 8, circular through grooves are cut (FIGS. 6 and 7). Adjustable lugs 17 are installed on each quill of the CNC drilling machine or drill head (FIG. 7). The number of adjustable lugs 17 is equal to the number of machining transitions holes. The angular placement of each stop 17 on the corresponding quill is selected depending on the angle, the location of the sliders 18 and the condition of the alternation of the interaction of the stops 17 of each quill with the corresponding slide 18, On the quill, performing the last transition, the stop 17

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not installed. It is installed on the quill without a tool performing the idling, which is necessary to return the moving parts of the sleeve to the first position. An annular bore is made in the inner conical part of the copier 8, in which the interchangeable conical copier ring 20 (FIG. 7) is rigidly fixed. Three identical profiles are made on the ring 20 (FIG. 10), each of which interacts with one roller of the device, Profiles consist of horizontal D,

5 Yes Dz To D5 inclined C pads and interconnected by inclined pads C.

The device for selecting the gap is placed on the protrusions of the nut 13 (FIG. 5), in the slots of which, by means of the axles 21, the swivel arms 22 are mounted with rollers 23 at the ends. The rollers belonging to one shoulder of the rocker arm 22, interact with the conical part of the pressure sleeve 16, and the other with the flap pressure cam 24, placed on the quill of the machine or the drilling head. Petal copiers installed on the pinhole

0 working positions, In the case under the petals of copiers 24 grooves are cut.

Multi-pass processing of one hole is carried out as follows.

When lowering the first quill, the tool 5 (fig. 5) enters the gap formed by the conical surfaces of the rollers 6, but does not yet touch the surface of the part to be machined, Bench-mounted copier 24 through the rocker arm 22 with rollers, the push sleeve 16, and the disc spring 12 and the copier 8 selects a gap between the rollers 6 and the tool 5. The drilling of a hole with a diameter d, begins. The rollers 6, with their spherical surfaces, rest on the pads Dd (Fig. 10) of the copier 8 and rotate, carried away by the tool. After the drill bit has sunk into the part by the size of the inlet cone and has been centered in the machined part of the hole, the profile of the petal copier 24 lifts the copier 8 with the spring 12 and the pressure sleeve 16, the rollers 6 release the rotary drill by the action of the springs 7 Drilling, At the end of the working stroke

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The movable stop 17, pressing on that of the slides 18, which is ready to turn the copier 8. When the copier is turned, the rollers 6 stand on the next diametrical dimension d (for example, under the countersink), i.e. they rest on the plots The drilling is completed and the tool 5 (drill) is withdrawn from the sleeve. A tool change occurs (for example, turning the turret of a CNC drilling machine). Further, the sleeve operation program is repeated as many times as the transitions need to be carried out. On the last transition, when the processing is carried out with the largest diameter (d) from the toolkit, the adjustment to the initial size d is not performed because the stop 17. is not installed on the quillies. The rollers and the hub copying unit are returned to the initial position (d ()) an anchor 17 mounted on the quill without a tool performing an idling. Thus, the sleeve is ready for processing the next part.

Claims (3)

Invention Formula I. Device for drilling, containing a drilling head, a conductor plate with a conductor sleeve, in the case of which a nut is installed, a roller spring and a mechanism for adjusting the internal diameter of the rollers to the diameter of the tool, characterized in that the rollers are spring-loaded and installed to expand the technological capabilities on bearings at an angle to the vertical axis of the device with the ability to move along its axes by means of the device inserted into the device mounted on the case with the ability to and spring-loaded against the housing and the tracer, while on the one ends of the rollers are conical surfaces ob- gap-forming tool to pass, and on the other - spherical surface adapted to cooperate with the cam. 2. The device according to Clause 1, notably, with the aim of automation settings for different diameters for multi-pass machining of holes, the adjustment mechanism for the inner diameter of the rollers is designed as an axially mounted pressure sleeve between an end of the spring and a nut and an adjustable stop placed on the quill drilling head and designed to interact with the pressure sleeve, 3. The device according to claim 1, characterized in that the adjustment mechanism of the inner diameter of the rollers is made asymmetrically placed in the slots of the housing and spring-loaded with respect to the body of two sliders with wedges located in the through grooves of the copier, and adjustable stops, the number of which corresponds to the number of processing transitions, and the angular location of each stop is selected depending on the angle of the sliders and the corresponding alternations with sliders and in the form of swivel arms installed in the grooves made in the nut, on which both rollers are fixed on both shoulders, the rollers of one shoulder are designed to interact with the pressure sleeve, and the rollers of the other shoulder - with a petal pressure cam, the petals of which are located in the slots of the housing, and the copier is mounted on the pin of the drilling head. F. V 21 5 17 18 20 Y 17 Fig.c 9 in-in f8