GB2214461A

GB2214461A - System for fastening tooling to machine tools

Info

Publication number: GB2214461A
Application number: GB8901408A
Authority: GB
Inventors: Ferrer Francisco Villagrasa
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-01-28
Filing date: 1989-01-23
Publication date: 1989-09-06
Anticipated expiration: 2009-01-23
Also published as: DE3902188A1; GB2214461B; ES2009169A6; SE8900245L; GB8901408D0; JPH01240205A; IT1232561B; IT8967050A0; FR2626513A1; AU2873289A; SE8900245D0

Description

Z14 4 6 1 Title: System for fastening tooling and tools to machine tools 1

2

The following invention, as is expressed in the title of the present specification, consists of a system for fastening tooling and tools to machine-tools, which is useful for fastening with rapid replacement as well as conventional fastening, having noteworthy advantages over traditional systems.

It is a system of fastening said tooling or tools to machine tools, the purpose of this tooling or tools being the chip flow in pieces which may or may not be metallic which are put in said machines for the forming thereof.

There are two systems for fastening tools to machine tools, or lathes in this case.

The conventional system whose fastening or replacement of tools in the turret of the machine is done manually by fastening the tool with two or more screws. Once the tool has been replaced and the machining has begun again, the piece has to be measured in the corresponding measuring device to know exactly in what coordinates we have the cutting edge, in other words, to know if the piece turns out well or badly. This all involves a considerable loss of time.

A rapid replacement system, in which case the fastening abd replacement of the tool in the turret of the machine can be done manually or automatically by means of actuating a screw or device. In this case the cutting edge upon grip- p-ng the tool is.going to stop at a set position, whose coordinates of the cutting edge are knownbeforehand and which therefore, eliminates all the time lost in handling the tool.

Presently either system may be used, in other words, either it is a conventional replacement or a rapid replacement, but not both at the same time.

When the fastening system is conventional, the tool can be fastening directly to the turret, or else by an intermediate tool fastening support.

When the fastening system is rapid, the tool is always fastened to an intermediate tool fastening support and which is fastened to the turret of the machine. There isno rapid replacement system known which does not need this intermediate support.

1 The main objective of the fastening system that the invention proposes is the reduction of the handling time of the tools upon replacing them in the machines. In this way, idle time is eliminated and these machines are, thErefore, made more profitable.

To complement the description which is going to be made hereafter and for the purpose of furnishing a better understanding of the features thereof, the present specification is accompanied by a set of diagrams which illustratively by not restrictively represent the following:

Figure 1.- It shows a front elevational view of the disk which we are going to call support-turret, which in this case is a monobloc supportturret, wherein we can observe how a series of recesses have been made. They form the fastening unit in a number identical to the tools that can be put in place and in each one of the recesses there are two holes, one in position parallel to a diameter of the disk and another one tangential, with a slight inclination.

Figure 2.- It shows a profile elevational view, according to the view along the cut A-A of the disk or monobloc support-turret represented in the previous figure, wherein, we also observe the two holes corresponding to one of the recesses for the positioning of the tool.

Figures 3A, 3B and 3C.- They show in detail the fastening unit, according to a plan view, an elevational view and a profile view, respectively and the recess wtih a hole for the positioning of the tool for outside is perfectly seen.

Figures 4A, 4B, 4C and 4D.- They show in detail the coupling-wedge which is the element upon being actuated by the tie draws the tool to its ideal position and fastening it, respectively corresponding to a plan view, an elevational view and a profile view and according to a view sectioned along the cutting line B-B of the plan view of figure 4A.

Figures 5A, 5B, 5C and 5D.- They show in detail a tooling-tool furnished with two cutting edges, according to a plan view, an elevational view and a profile view and according to a cut made along the axis C-C of the plan view respectively.

Figures 6A, 6B and 6C.- They shoj in detail the entire fastening unit, according to a plan view, an elevational view and a profile view along the cut D-D of the elevational view, respectively.

Figure 7.- It shows an elevational view of the disk or support-turret divided intwo twelve positions, in which inside and outside tools have been represented, as well as a tool combining both, merely as an illustrati.on, since the tools will be either inside or outside ones.

Figure 8.- It shows a profile view of the disk or support-turret represented in the previous figure.

In view of the figures commented on and in accordance with the numbering used, we can observe how the disk or support-turret 1 is provided with some recesses 6 in which the surface 7 has a determined inclination and on which the coupling-wedge 3 will rest on one of its surfaces provided with said same inclination.

If the elements that make up the fastening systemcan be mounted directly on the disk, we will call it a monobloc support-turret. Likewise, the recesses 6 of the disk 1 will have the same inclination if the attached element 8.

In the monobloc support-turret 1 there are the holes 9 and 10; hole 9 is in a tangential slightly inclined position for the outside tools and hole 10 is in position parallel to a diameter of the disk for the inside tools.

The independent fastening unit 11 is provided with the same recess 6 as the monobloc. support-turret 1 wherein all the elements which make up the system are mounted. This fastening unit 11 can also be coupled to all the convential turrets existing on the market, converting them into rapid replacement turrets.

Whether this is a monoblock turret 1 or one with attachments 8, as well as whether it is an independent i - 5 fastening unit 11, the adequate operating mechanism may be applied to them and make the system automatic, semiautomatic, manual or mechanical like the one represented in the group of drawings which accompany the present specification.

Likewise, he corresponding channels may be made to transport coolant if so required.

The coupling-wedge 3 is provided with a threaded hole 12 with an inclination adequate for the mounting of the tie pin 2. This couplingwedge 3 is the element which upon being actuated by the tie 2 draws the tool to its ideal position and fastens it.

The contact surface of the coupling-wedge 3 with the tool is straited and two of said different and deeper striae are the ones that act when it makes the tool object of the present description fast. The rest of the striae are not so deep and they are made according to two directions perpendicular to each other and they are the ones that act when the tool is conventional. (In the conventional tool the support surface is flat, in other words, it does not have the protuberances which hold these tools. )

The striae of the coupling-wedge 3 may have the section which is desired, in the designs a trapezoidal one is represented, but it may be triangular, circular, etc., and they may be in either direction, of the desired length and in the desired number.

Upon being in the working position this coupling-wedge 3 makes contact with one side of the tool 4 and on the other side with the surface 7 inclined a determined angle of the support-turret 1 and which makes this element act as a wedge and grips the tool 4.

Left as well as right tools and inside 4 or outside tools may be fastened.

The tooling-tool 4 is provided with two protuberances 15 in inclined position where the notches 13 of the couplingwedge 3 are coupled.

t 6 - This tool 4 is provided with two cutting edges, one at each end, and which may be used indistinctly. Upon replacing one by another because one of them has broken, the coordinates of the cutting edge are the same.

on the top surface the tool 4, which is the one in contact with the coupling-wedge 3, has suitable protuberances 15 which are complemented by the striae 13 of the coupling-wedge 3 and which are adapted. They may slide over each other.

Two little plates 14 can be seen mounted on the tool 4 on each one of its ends, and thus the angles which they can have are all the ones which may or may not exist on the market. The little plate may or may not be replaceable and any desired tool (measuring device, drill chuck, scrapers, mill holder, etc.) may be coupled.

Likewise, the section of the handle of the tool 4, though it has been represented square may be of any other shape (rectangular, trapezoidal, round or irregular.) The tie 2 consists of a pin and it is the joining element between the cupling-wedge 3 and the support-turret 1 and it may be operated manually or automatically, as well as by a mechanical, hydraulic, pneumatic, electric element or device or even a combination thereof.

The protuberances 15 of the top surface of the tool 4 correspond with the stria 13 of the coupling wedge-3 and both may be effected to the contrary, in other words, the protuberances are in the coupling-wedge and the striae in the tool.

Likewise, the notches may be on the bottom surface of the tool and the protuberances on the support surface on the support, or vice versa.

The operating is the following: the tool 4 is put in place manually, or else by a mechanical means in the corresponding support of the fastening unit 11, the coupling -wedge 3 being manually or automatically actuated by the tie 2.

This coupling-wedge 3, joined to the tie and tilting on its shaft, is activated and makes contact with the U 1 - 7tool 4 in two opposite areas, which are the ones of the protuberances 15 in the tool 4 and the striae 13 in the coupling-wedge 3. The coupling- wedge 3 adapts to the tool 4 and is drawn towards the lateral surface "Ll', once the tool 4 makes contact on this surface, the couplingwedge 3 continues pressing and due to the fact that these striae are included at the adequate angle, the tool 4 slides backward, until it makes contact with a second transversal surface 'IT" and which may or may not be perpendicular to the above cited surface. This second contact may be a point, a line or a surface and in any direction in space Hence, the tool 4 remains rested on the base surface "B", on the lateral surface IILII and on the transversal surface 'IT" and gripped at the top, in other words, by the surface of the protuberances 15, by the two contact points, surface lines or contact surface, with the coupling-wedge 3, by which the tool remains fastened and in its ideal point.

At the same time this coupling-wedge 3 has remained flushed with the included surface of the support which makes it a secure and efficient fastening.

Among the advantages that the described system has we can cite the following:

Versatility: upon being able to couple the tools object of the present description, as well as conventional tooling existing on the market. This possibility does not exist in conventional systems.

Rapid replacement: it leaves the cutting edge of the tool at a set distance with regard to a point of reference on the machine, in other words, its coordinates are known beforehand in all dimensions in space. Thus, all the idle time used in placing the edge in place is avoided.

Economy: the existing conventional tools have a single edge, with this system the tools have a double edge. Likewise, an intermediate support is used presently in rapid replacements, already exsiting on the market. With the proposed system, the intermediate support can be eliminated.

- is -

Claims

1. SYSTEM FOR FASTENING TOOLING AND TOOLS TO MACHINE TOOLS, of the type made up of a disk to which the tools are fastened, in a variable number thereof, for the chip flow of the pieces to be formed, whether or not they are metallic, and in the ones which it is necessary to fasten and replace tools somewhat periodically, is essentially characterized because the disk or support-turret to which the cutting tools are fixed is provided with a series of recesses, forming the fastening unit, one of the surfaces of said recesses being provided with a certain inclination and having effected a tangential recess, with a slight inclination, for inside tools and another recess parallel to a diameter of the disk for outside tools, all of the elements which make up the system remaining in said recesses.

2. SYSTEM FOR FASTENING TOOLING AND TOOLS TO MACHINE TOOLS, according to claim one, characterized because the fastening unit can be made up of an attached element provided with an inclined surface, identical to the surface of the recess of the disk, on whose surface the coupling-wedge will rest with that same inclination and provided with a threaded hole for the location of the tie which upon being actuated will make the couplingwedge pull the tool, with a double cutting edge, to its ideal position and fasten it, having foreseen that the surface of the couplingwedge which is supported with the tool is striated, with the particular feature that two striae are deeper and they will coincide with two protuberances which the surface of the fool which is backed to the coupling-wedge has so that upon being in the working position it presses against the inclined surface of the fastening unit of the disk and against the tool.

had 1989 at The Patent Office, State House, 66.71 High Holborn, London WG1R 4TP. Further copies maybe obtained from The Patent Office. Sales Branch, St MarY Cray, Orpington, Rent BRS 3ND. Printed by Multiplex techniques ltd, St Mw7 Cray, Kent, Con- 1/87 t.

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