HK1001585B - Mounting device for a tool or a workpiece - Google Patents

Description

The present invention relates to a device for attaching a tool or workpiece within the meaning of claim 1.

Such fixing devices are known and are used, for example, to adjust an electrode holder or an electrode to a clamping feed to a precise fit.

EP-0 111 092 B2 is a known type of mounting device which, for centering in the X and Y directions, provides for a sheet with protrusions placed between the two parts to be fixed, the edges of the protrusions of the sheet being in line with the centrifugal projections of one part, until the two parts touch at the intended passing surfaces, in order to also provide an alignment and adjustment in the Z axis, i.e. the longitudinal median axis of the whole arrangement.

GB-A-1 094 067 is a two-piece revolver head of a rotary machine known to be an integral, non-replaceable component of the rotary machine. One, the rear part of the revolver head is fixed, while the other, the front part is rotatable. The primary function of this revolver head is to incorporate machining tools - namely, rotary steel - in such a way that they can be brought into the desired radial working position by turning the revolver head.

EP-A-0 267 352 shows a device for repeatable connection of two objects, which has two clutches. The clutch surface of one clutch is fitted with rigid profiles, which can be engaged with the clutch surface of the other clutch with the help of a corresponding number of matching and elastically deformable transmission elements, in order to transmit force without relative movement of the two clutches.

The purpose of the invention is to create a fixing device of the type described in the general term of claim 1 which allows precise centering or adjustment in both the X and Y directions while simultaneously fitting each other more precisely in the Z direction, without the need to produce an intermediate sheet and fitting it more precisely. Any other additional aid to the precise contact is also avoided when simultaneously centering or adjusting. However, in use the fitting surfaces are to be fixed and without a risk of the two parts to be fixed clipping together and simultaneously centred or adjusted in the X and Y directions, i.e. the test pieces must be completely fitted but the final fit must not be in contact with each other.

The solution to this seemingly contradictory problem is that the passing-springs are individually moulded on one of the parts between the contact surfaces, while passing-springs are inserted directly into the other part to be connected to it at appropriate points, which interlock perfectly when they are attached to each other, and that the passing-springs are designed on an area of the part exhibiting them that can be elastically deflected or flexed in an axial direction against a deformation force.

If the parts are so designed and fastened together, the passing spring enters the passing spaces before the contact surfaces are in contact with each other. However, by increasing the axial tension or fastening force, the contact surfaces can be attached in the desired way without any intermediate plate or similar, thus also preventing slopes of the parts against each other, because the passing spring that causes centering or adjustment in the X and Y directions or the one that carries them gives something in the direction. Thus, due to the bending or sloping spaces provided by the passing spring, the connecting parts can have a firm connection, if the passing spring is placed in the same shape and without any additional adjustments.

The following are examples of the implementation of the invention, described in more detail by means of the drawing with the essential features of the invention, which shows in a partly schematic representation: Fig. 1 shows a holder, as shown in Fig. 1 in reverse, and the tool or tool to be connected to it and fixed to it just before assembly and adjustment, indicating that a lateral area provided in the area of the tool or tool can be a slit and/or a break through the screen,Fig.3a partially intersecting side view of the mounting, showing the direction of assembly of the tool or tool and the shape of the mounting, and indicating that the mounting is more flexible and can be adjusted after the mounting, and a lateral view of the mounting, showing the mounting side view.

A fixing device for a tool or workpiece, in the example of an electrode which can be used to work other workpieces, but which must also be worked first as a workpiece and is a first part 1 of the fixing device, has, as shown in Fig. 3, a central clamping screw 2, hereinafter referred to as screw 2, to enable the first part 1 to be attached to a second part 3 holder, also called part 3.However, the central screw opening 7 on the holder 3 and the thread drill 8 on the workpiece or part 1 are usually sufficient to achieve a sufficiently secure attachment with screw 2, because the fit surfaces 4 and 5 lead to a precise mutual position in an axial direction and transversely or angularly to screw 2 when they are tensioned against each other.

For this purpose, the passing-prongs 9 are placed between the contact surfaces 5 on one of the parts, in the example of Part 3, and the other part to be connected to it, in the example of Part 1, has passing-prongs 10 at the corresponding places.

Figure 3 shows the arrangement in which the passing beams 9 formally interfere with the passing beams 10.

In order to ensure that the adjustment and centering in the X and Y directions are maintained, but at the same time also in the Z direction by contact of the passing surfaces 4 and 5, the passing bolts 9 are each in an axial direction, i.e. in the direction of the course of the passing bolt 2, against a deformation force elastically deflectable or flexible area 11 provided for in this Part 3.

The spacing of the passing surfaces 4 and 5 when the passing surfaces 9 interfere with the passing spaces 10 as shown in Figure 3 shall be equal to or less than the flexibility of the extendable area 11 to ensure that the screw 2 is so flexible when tightened that passing surfaces 4 and 5 can be fitted together in the area of the passing surfaces 9 and 10 already adjacent in the axial direction.

Thus, if the screw 2 is tightened in the position shown in Fig. 3, the flexible area 11 according to Fig. 4 is deformed slightly in the axial direction and, while maintaining centering and adjustment between the pass spring 9 and the pass spring 10, the pass surfaces 4 and 5 also come into contact with each other, thus touching each other and providing mutual alignment of parts 1 and 3, so that the Z-direction adjustment is also achieved.

In the example, the pass spring 9 is wedge-shaped in cross-section, i.e. it has a trapezoidal cross-section, so it is rejuvenated from its base 9a in a vertical direction. The pass spring 10 has, in accordance with this form of the pass spring 10, opposite surfaces 12 arranged vertically, which, when in use, are aligned with the flanks 9b of the pass spring 9 which are vertically located in cross-section, as is clearly seen in Fig. 4. This results in the best possible centering and adjustment in the direction of the separation or contact axis between the parts 1 and 3, i.e. to the Z axis and to the screw axis respectively.

If appropriate, the matching spring 9 may also have a circular or semicircular cross-section capable of interacting with either slanted counter-surfaces 12 or analogously shaped counter-surfaces.

The flexibility of section 11 is achieved by providing for a slot 13a or a slot 13 adjacent to the slot 9 in the tension direction, in the example shown in Figures 1 and 4, a slot 13 running parallel to the passing surfaces 5 separating the section 11 of Part 3 with the respective slot 9 from the rest of that part 3 by an otherwise single connection. Figure 4 shows that the dimension of this slot 13 in the tension direction, i.e. the slot w, is reduced by the slit operation, particularly in the middle of the slot directly below or above the slot 9.The lateral extension or length 1 of slot 13 across the course of the approximately radially arranged slot 9 is greater than the width of slot 9 at its base 9a in this direction, which is clearly visible in Fig. 1, 2 and 4. This gives a sufficiently long area 11 to allow it to yield elastically when the whole fastening device is tightened by means of screw 2 under a reduction in the cross section of the slot w.to maintain sufficient spring action, elasticity or suppleness of the area 11 while maintaining sufficient strength to maintain the adjustment and centering.

In Figure 2 it is indicated that derogations 13a may be provided instead of slot 13, whereas in Figure 2 a slot 13 and such an exception 13a are shown, but in all the 11 concessional areas derogations 13a may be provided, as indicated by dashes.

These gaps 13a are open at the top 18 facing the pass 9 as shown in Fig. 2 and the side boundary walls 13b run parallel to each other and at right angles to the side surfaces 14 and top 18. If such gaps 13a are placed below the pass 10 they could run in an analogous manner up to a corresponding sub-section 17 of Part 1.

It is also conceivable that there are exceptions to slot 13 on the opposite sides and to slot 13a on the other two opposite sides. This is in practice a special case of a slot in which the slot boundary, which is not in line with the flexible section 11, is practically omitted or eliminated.

The passing-out protrusions 9 are of an elongated shape, as shown in Fig.1 and 2, and run from the edge or side-surface 14 of the part 3 showing them towards its centre and end in front of this centre. The passing-out protrusions 10 are oriented in the same way and direction as shown in Fig.2 and are rounded in the area of the side-surfaces 15 of part 1.

At least two or two pass-out spaces 10 which are at opposite sides 15 and which also intersect in the example, which is not necessarily the case, could also be connected to each other, for example, to form a pass-out through the centre, the endpoints of which then interact with the pass-out spaces 9 accordingly, allowing the application of such opposite pass-out spaces in a single operation.

These power-efficient passing-prongs 9 and, accordingly, the passing-prongs 10 are arranged on intersecting lines at right angles, so that reciprocal heat movements are not hampered even by the rounded design of the passing-prongs 10. Such heat movements may occur when part 1 is machined as a cutting tool or when it is later used as a tool as an electrode.

The third part, which has slots 13 or 13a to form the flexible area 11, has a central depression 16 into which slots 13 or 13a open and slots 13 or 13a open to the side surfaces 14, so that they are all continuous in shape, allowing the flexibility of area 11 shown in Fig. 4. In order to obtain the greatest possible adjustment and centrifugation area, the forward-facing 9 springs run along the entire width of the slit from exit 14 to depth 16. The forward-facing 9 also have a depression corresponding to the total length of the slit 13 or 13a. This results in the same proportions of tension and the same shape as possible in the direction of attachment and the overall length of the slit.

It should be noted that the thickness of the material in section 11 between slots 13 or exceptions 13a and the passing beam 9 and, where appropriate, the passing beam 10, may be chosen to such a degree that a deformation in the tension direction requires a force of at least about 200 N per passing beam 9, which means that the fit in the passing beam 9 area is maintained despite this flexibility.

The attachment of two parts 1 and 3 to each other, for example a tool or workpiece, to a holder, requires that the two parts 1 and 3 to be attached in use have adjacent passing surfaces 4 and 5 and are tensioned against each other by means of fasteners running transversely or at right angles to the contact of these passing surfaces 4 and 5, such as a single screwdriver 2. In addition to the passing surfaces 4 and 5 fixing each other in the Z-axial position, passing surfaces 9 on one part and passing surfaces 10 on the other are provided, which prevent the displacement of the interconnected and spinning parts 1 and 3 to the mounted mountings within the desired lengths of the X and Y-axis and 4 and 3 passing surfaces 1 and 3 to the mounted mountings.The pass spring 9 and/or pass spring 10 are located in an elastically deflectable or flexible area 11 of the part 1 or 3 which contains them, in an axial direction against a deformation force which can be applied by the screw 2, so that the pass spring 9 can fit precisely into the pass spring 10 before the pass surfaces 4 and 5 touch.

Claims (15)

1. Mounting device for a tool or workpiece as a first part (1) on a holder (3) as the second part, the two parts to be mounted one on the other having mating surfaces (4, 5) lying one against the other in the position of use and being clamped one against the other by mounting means extending transversely or at right angles to the plane of contact of these mating surfaces (4, 5), whereby at the mounting point, in addition to the mating surfaces (4, 5) fixing the mutual axial position, mating projections (9) are provided, which prevent a displacement of the parts (1, 3) connected to each other transversely to the mounting means or within the plane of contact of the mating surfaces (4, 5) and which centre the two parts (1, 3) with an exact fit transversely with respect to this plane of contact at least in the X- and Y-direction, characterised in that the mating projections (9) are integrally formed on one of the parts between the contact surfaces, whereas mating recesses (10) are let directly into the other part to be connected thereto at corresponding points, which engage one in the other in a form-locking manner with an exact fit at the time of mutual mounting, and that the mating projections (9) are provided on a region (11) of the part comprising them, which can be deflected elastically or is resilient in the axial direction against a deforming force.
2. Device according to Claim 1, characterised in that at the time of engagement of the mating projections (9) in the mating recesses (10), the mating surfaces (4, 5) are at a distance apart which is equal to or less than the elastic deflection of the region (11).
3. Device according to Claim 1 or 2, characterised in that the mating projections (9) are wedge-shaped or curved or circular in cross-section or are provided with a trapezoidal or semi-circular cross-section and the mating recesses (10) have counter-surfaces (12) arranged obliquely in a corresponding manner.
4. Device according to one of Claims 1 to 3, characterised in that a recess (13a), cavity and/or a slot (13) extending in particular parallel to the mating surfaces (5), is provided adjacent to the mating projection (9) in the clamping direction, which separates the region (11) of the parts (3) comprising the mating projection (9) from the remaining region of these parts, and that the dimension of this cavity, recess (13a) or slot (13) extending in the clamping direction can be reduced elastically by the clamping operation.
5. Device according to one of Claims 1 to 4, characterised in that the recess (13a), cavity or slot (13) is located on the part (3) comprising the mating projections (9), in the clamping direction behind these mating projections (9).
6. Device according to one of Claims 1 to 5, characterised in that the mating projections have an elongated shape and extend from the edge of the part (3) comprising them, in particular in the direction of its centre and terminate before the centre and that the mating recesses (10) are oriented in the same manner and are open on their edge.
7. Device according to one of Claims 1 to 6, characterised in that the mating projections (9) are prismatic centering strips, which are distributed uniformly on the periphery of the part (3) and in the case of a part having a round cross-section extend radially, and in the case of a square part extend at right angles to the side faces (14).
8. Device according to one of Claims 1 to 7, characterised in that the strip-like mating projections (9) and the mating recesses (10) are located on lines intersecting at right angles.
9. Device according to one of Claims 1 to 8, characterised in that the part (3) comprising the recesses (13a) or slots (13) to form the resilient region (11) has a recess (16) located substantially centrally, into which the recesses (13a) or slots (13) open and that the slots (13) or recesses (13a) open towards the side faces (14).
10. Device according to one of Claims 1 to 9, characterised in that the mating projections (9) run along the entire side of the slotted region extending from the outer side (14) as far as the recess (16).
11. Device according to one of Claims 1 to 10, characterised in that the lateral extent or length (l) of the slot (13) or recess (13a) with respect to the transverse extent of the mating projections (9) is greater than the width of the mating projections (9) in this direction.
12. Device according to one of Claims 1 to 11, characterised in that the thickness of the material of the resilient region (11) located between the slot (13) or recess (13a) and the mating projection (9) is so great that a deformation in the clamping direction necessitates a force of at least approximately 200 N per mating projection (9).
13. Device according to one of Claims 1 to 12, characterised in that the length (l) of the slot (13) or recess (13a) with respect to the transverse extent of the mating projections (9) amounts to approximately three to five times the width of the mating projection (9) at its base (9a).
14. Device according to one of Claims 1 to 13, characterised in that the recesses (13a) are open on the upper side (18) remote from the mating projection (9) or the mating recess (10) or on the under side (17) and their lateral boundary walls (13b) extend parallel to each other and/or at right angles to the side faces (14; 15) or to the upper side (18) or lower side (17).
15. Device according to one of the preceding Claims, characterised in that at least two mating recesses (10) opening out on opposite side faces (15), align with each other and/or are connected to each other as a mating recess continuing across the centre.