JPH06509515A - Collet chuck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Collet chuck In the present invention, the shaft is housed in a collet and the machining tool is tightened. The male conical part of No. 1 can be inserted into the female conical part of the chuck of the machine tool, and the collet is chucked. The clamp attached to the jack can be press-fitted into the female conical part in the axial direction with a nut. , the tightening relates to collet chucks for machining tools with shafts. this species collet chuck is already known. When tightening or fixing the machining tool, do not The resultant force of the force component in the direction and the force component in the radial direction is applied to the collet. As a result, Colette is not only pushed axially into the chuck, but also transversely to its longitudinal axis. It is also loaded. This allows machining along the axis of the tool spindle into which the chuck is inserted. The axis of the tool may shift laterally. This deviation is only 1/100 mm This is a value in the range of Totally unacceptable or at least unwelcome.

Therefore, an object of the present invention is to provide a first The object of the present invention is to improve a collet chuck of the type described in .

In order to solve this problem, the present invention incorporates the collection described in the generic concept of claim 1. In the lock chuck, the tightening is done by connecting the female cone between the nut and the second male cone of the collet. A ring-shaped pressure piece with a conical part is arranged, this pressure piece having a guide sleeve, This guide sleeve fits over the cylindrical outer circumference of the chuck with a small radial play. Tightening is done between the nut and the ring-shaped pressing piece or between the ring-shaped pressing piece or its Between the guide sleeve and the chuck, a plurality of pushers distributed evenly around the circumference are provided. A pressure adjusting screw is provided or the tightening is done when the female conical part of the nut is the first part of the collet. The nut has a guide sleeve that contacts the male conical part of 2 and tightens the nut. covers the cylindrical outer circumference of the chuck with small radial play, and tightens quickly. between the chuck and the adjustment ring axially and radially supported on the chuck, especially around the circumference. A plurality of evenly distributed adjustment screws are provided or the tightening is easy. The female conical part of the collet contacts the second male conical part of the collet, and part of the nut guides the tightening process. It is designed as a sleeve, and this guiding sleeve can move the shaft with small radial play. The pressure ring is provided with a female conical portion that covers the cylindrical outer periphery of the pressure ring. The ring is axially non-slidably but rotatably supported in the guide sleeve, and the guide Between the sleeve and the chuck, in particular the radial multiple evenly distributed around the circumference It is proposed that several pressure adjusting screws are provided.

At the root of these groups of inventions is the following common inventive idea.

That is, in this type of collet chuck, the guide sleeve has a small radius. The guide sleeve is fitted into the chuck with a play in the opposite direction, and the guide sleeve is equipped with a pressing piece, and the tightening is done with no effort. Tightening of the bolt is sometimes done by pressing the guide sleeve against the second male cone of the collet. The shaft of the machining tool is clamped and held by the chuck, and the tool main body into which the chuck is inserted is When the lateral deviation of the machining tool axis with respect to the axis of the shaft is removed by the adjusting screw, There is one common inventive idea.

Of course, every individual part of this collet chuck is machined with high precision. . On the other hand, some degree of play between the individual parts is unavoidable. Tighten with a nut. Due to the required tolerance between the thread and the external thread of the attached pin, especially when the thread becomes dirty, Tightening is done when the axis of the nut is laterally shifted or tilted from the theoretically optimal position. I will do it. As a result, the second male conical part of the collet is rotated by the pressing piece. The load is applied asymmetrically, which in turn causes the axis of the machining tool to be erroneously positioned relative to the theoretically optimal position. It will be positioned at the correct position. However, according to the structure according to the invention, the push The pressure piece is equipped with a guide sleeve that allows a relatively long guidance of the pressure piece on the chuck. This tight fit between the guide sleeve and the chuck makes it easy to This effectively works to prevent the pressing piece from tilting to the theoretically optimal position. Said play The width is particularly on the order of 1/loo to 2/100 mm. between the pressing piece and the chuck The longer the guidance in between, the more desired results will be obtained. But for practical reasons Therefore, there are limits.

The above-mentioned play between the pressing piece and the chuck completely prevents the lateral displacement or inclination of the pressing piece. Therefore, the rotational asymmetrical load on the collet due to the pressing piece is completely eliminated. The existing tilt position or lateral displacement of the tool relative to the optimum position This must be corrected. This is easily possible by means of a suppression adjustment.

Alignment is achieved with high precision measuring equipment, which ultimately Rotational accuracy on the order of a small U can be obtained. one or more pressure adjustment screws By screwing or loosening the collet chuck as in the case of counterbalancing. While slowly rotating the collet and constantly observing the measuring device, press the collet with the pressing piece. Furthermore, by applying force to the processing tool, highly accurate rotation can be achieved. I can do it.

In the case of a third embodiment, the clamping is performed without the sleeve being formed as a separate part; The attachment is formed directly on the nut. Longitudinal on the chuck or its cylindrical circumference Directional guidance takes place with very little radial play. Instead of pressure adjustment screw In particular, adjustment screws are used as tension screws. Check the relevant range For example, tightening can be done by moving the adjustment ring closer to the adjusting ring of the nut and the chuck. The poor rotation accuracy caused by contaminants in the joints can be eliminated by the method described above. Wear.

Other structures, resulting advantages and effects of this third embodiment are within the scope of the claims. It is described in the genus section.

According to a fourth embodiment of the invention, the tightening is done on a part of the nut, and the tightening on the chuck is It is particularly advantageous to design it as a guide sleeve which allows a relatively long guide of the nut. The fit between the inner sleeve and chuck is tight, so the theoretically optimal position The corresponding guide sleeve and thus the tightening effectively prevent tilting of the nut.

The aforementioned play between the guide sleeve and the chuck results in a lateral movement of the guide sleeve. It is not possible to completely prevent the slippage or inclination of the Since it is not possible to completely remove the rotationally asymmetric load of the The smallest tilt or lateral deviation of the tool relative to the correct position must be compensated for.

This is easily possible by means of a pressure adjustment screw. The pressure ring is not attached to the guide sleeve. Always tightly fitted.

When the pressure adjustment screw is tightened, the pressure ring should, in principle, adjust its radius to the collet. It has a strong effect on the direction. The radial force component of this local action causes the tool to move in that direction. oriented, thereby reducing undesired radial runout of the tool within the collet.

For example, if four such adjustment screws are provided at intervals around the circumference, by tightening 1llil or more screws, and if necessary 1 The desired orientation result can be achieved by loosening one or more other screws. It will be done.

According to another form of the first embodiment of the invention, the tightening is performed by screwing the nut into the chuck. The pressure adjustment screw is provided between the tightening nut and the ring-shaped pressure piece.

By tightening the pressure adjustment screw, the radius of the pressure piece relative to the collet will be adjusted within this range. It has a strong effect on the direction. The radial force component of this local action causes the tool to move in that direction. oriented, thereby reducing undesired radial runout of the tool within the collet.

For example, if four such adjusting screws are provided at intervals around the circumference, by tightening one or two screws and, if necessary, one or more screws. By loosening a few other screws, the desired orientation result is achieved.

In the case of this first embodiment, the feeding direction of the pressure adjusting screw is preferably set along the collet longitudinal direction. parallel to the axis. In this case, the adjustment screw can be tightened by screwing into the nut. be. To be precise, the pressure adjustment screw should be tightened from the front to cover the pressure piece. Inside the inner brim.

Other embodiments of the invention are described in claim 4. This implementation Allows you to apply force to precise points.

Other embodiments of the invention are described in claim 5. In this case, the tightening is The chuck is rotatably but non-slidably supported on the chuck, so it can be tightened by rotation. When tightening, the nut does not slide in the axial direction, but tightening is done relative to the nut and chuck. This means that the pressing piece is slid in the axial direction. on the chuck by appropriate means. Rotation of the pressing piece is prevented. A particularly advantageous method for this purpose is to use a pressure adjusting screw. You can attract it. This pressure adjustment screw differs from the first embodiment in the radial direction. Since it is located between the pressure piece and the chuck, it is easy to adjust the pressure adjustment screw. When tightened, it acts directly radially on the area of attachment of the chuck. At the same time, press The radial pressing force between the pressure piece and the second male cone of the collet falls within this radial range. The load is unloaded at the same time. This must be observed when orienting the tool.

A corresponding construction of this second embodiment of the collet chuck is set out in claim 6. It is.

In another embodiment of the invention, the chuck has a number of radial directions corresponding to the number of pressure adjustment screws. Equipped with a cutout. The depth of this notch is determined from the free end surface of the chuck by a nand. It gradually becomes shallower towards . Tighten the adjustment screw and notch when tightening the nut. A processing tool that can prevent the rotation of the pressing piece and is inserted into the collet, e.g. Adjustment for accurate centering of milling cutters, drills, thread cutters, etc. Form the device. To tighten, loosen the nut and the inner part of the adjustment screw that engages with the notch will tighten. The side edges slide towards the deep groove edges and are thereby disengaged.

Each pressure adjustment screw preferably has at its inner end a radial direction of attachment of the chuck. It has a pin-shaped protrusion that engages with the notch. The diameter and length of this protrusion are determined by the maximum Determined by depth of entry and groove width.

Tightening is performed using the method of the present invention in order to rotate the nut without sliding it in the axial direction on the chuck. In other embodiments, the chuck includes a circumferential groove having a generally semicircular cross section. Ru. Several balls are engaged in this groove. Each of these spheres is closed from the outside. Possible, the tightening is in the radial hole of the nut. Closure can be achieved, for example, by means of a threaded stopper. It can be carried out. For tightening, the rotatable and non-slidable bearing of the nut can be tightened using other known methods. Although this can be easily achieved with the law, the above type of law seat is extremely difficult to achieve because the friction is small. It is suitable for this purpose.

Other embodiments of the invention are described in claim 13. The cross section of both grooves is semicircular. Because of the shape, a circumferential groove with a generally circular cross section is formed. This groove has the same The whole unit resembles a radial ball bearing because it contains balls with a diameter of It is formed at this location. Of course, the pressure ring does not tilt relative to the guide sleeve. . This is achieved by a tight fit and a corresponding ring width. Thereby , the guide sleeve or the tightening nut is oriented directly onto the collet through the pressing ring. Direct transfer is possible.

The radial ball insertion bore of the guide sleeve is preferably closable, in particular by a plug. Ru. Since this stopper is known on its own, there is no need to describe it in detail.

Other embodiments of the invention are described in claim 15. With this implementation, To tighten the nut, when loosening the nut, it is removed from the female conical part of the chuck via the entraining ring. The cut can be removed.

The coolant and/or lubricant supply is machined through a collet and a tool such as a drill. If installed in the chuck of the machine tool, it will provide the required system in the range of collet chucks. must be carried out. This is especially true in the area of the outer end of the collet. It's true.

Other embodiments of the invention in this regard are described in claim 16. pressure Make sure that the liquid supplied below does not leak out from other undesired parts of the collet chuck. In order to make the collet chuck as described in claim 16 In addition to the seals at the side edges, the necessary internal seals are also provided, e.g. by at least O-rings. Seal must be done. Is there already a known solution to this problem? A detailed explanation is not necessary. Other embodiments in this regard are given in claim 17. be.

A major advantage of the present embodiment is that collets of conventional construction can be used. The point is that there is no need for special configuration in this regard.

Next, the present invention will be explained in detail based on the drawings. Figures 1 to 5 show five examples, respectively. This is shown in a half-sectional view.

In Figure 1, a collet of conventional construction can be used with a milling cutter, drill, thread cutter, etc. It accommodates the shaft of a processing tool 2, such as ing. The collet l is a first male circular part inserted into the female conical part 4 of the chuck 5. It has a conical part 3. In this case, of course, both conical portions have the same taper ratio. Chattu As is well known, the key 5 itself is compatible with the shape of the tool spindle (not shown) of the machine tool. and is held therein by known means.

Tightening is performed using a nut 6. However, this tightening is done directly by the nut. Rather, it acts on the collet l indirectly, that is, through the ring-shaped suppressing piece 7. are doing. For this purpose, the collet is provided with a second male conical part 8. This second The male conical part is shorter than the first male conical part 3, and its slope is the same as that of the first male conical part 3. It's in the opposite direction. The second male conical portion 8 engages with the female conical portion 9 of the ring-shaped pressing piece 7. ing. In this case, both cones have the same angle and approximately the same length or height. It is. As is well known, the collet L has slits formed in multiple locations in the vertical direction. Ru. A circumferentially extending annular groove 10 is provided between the two conical portions 3.8. this For the vertical slit in cut 1, all known vertical slits are applicable. It is.

The ring-shaped pressure piece 7 is provided with a guide sleeve 11 according to the invention. This guide The sleeve is preferably molded in one piece. The guide sleeve can be used even with small radial play. Thus, it is fitted into the cylindrical outer peripheral portion 12 of the free end portion 13 of the chuck 5.

This radial play is of the order of 1/100 to 2/100 mm. Guide pickpocket The tube 11 has a cylindrical shape on the outside and is tightened by being surrounded by a cylindrical hole 14 in the nut 6. It is rare. In this case, a large play can be provided at this location. End part 1 3 and the guide sleeve 11 is small, and the length of this guide part is relatively long. As a result, the guide sleeve 11 is attached to the chuck 5 so as not to tilt.

For tightening, the nut 6 is provided with a female thread 15 at its left end in the figure. This one Accordingly, the nut can be screwed into the collar 16 of the chuck 5. that Tightening is done by rotating the nut 6 in one direction. The inner collar 17 is pressed against the ring-shaped pressing piece 7. On the other hand, rotated in the opposite direction. When the device is turned on, the tightening device is loosened. The inner flange 17 is pressed directly against the pressing piece 7. [In the case of the 11th embodiment, in particular, the pressure is distributed uniformly around the periphery] It is pressed through the pressure adjustment screw 18. Place for normal size collet chuck In some cases, four or five pressure adjustment screws are sufficient. In Figure 1, the inner The truncated conical end 19 has an annular shape extending in the circumferential direction of the outer end surface 21 of the ring-shaped pressing piece 7. It engages with the groove-shaped accommodating portion 20 . Thereby, the longitudinal length of each pressure adjustment screw 18 is The axis necessarily extends parallel to the central axis 22 of the collet chuck. Become.

The machining tool 2 is inserted into this collet chuck as is well known, and tightened by tightening the nut 6. By tightening, the tightening is maintained within the collet 1. Next, turn the rotation to the key Ru. If there is rotational runout exceeding the permissible limit, at least one pressure adjustment screw 1 8 and optionally at least one other, e.g. diametrically opposite This rotational runout can be removed by loosening the suppression adjustment screw. As a result of the measurement, No pressure adjustment! By adjusting through 8, it is possible to adjust the It was found that rotational runout could be reduced.

In the case of the second embodiment shown in FIG. It is supported on the chuck 5 so as not to be slidable in the opposite direction. Furthermore, the guide sleeve 11 is It is supported on the chuck 5 so as to be slidable in the axial direction of the chuck but not rotatable. There is. To tighten in one direction of rotation, rotate the nut 6 to tighten the guide sleeve. ! 1 slides in the direction of arrow 23, thereby tightening the processing tool 2, and in the opposite direction To tighten the guide sleeve in the opposite direction of arrow 23, rotate the nut. The machining tool 2 is released. Figure 1. As can be seen by comparing 2, Fig. In case 2, the tightening is such that the nut 6 and the guide sleeve 11 are mutually located in the direction of extension. On the other hand, in the case of Fig. 1, the guide sleeve l1 is tightened by the nut 6. It has a compact, short structure with a large diameter. Both structures throat Which one to choose depends particularly on the particular usage situation of the collet chuck.

Furthermore, the same parts have the same reference numerals in both figures. Also in Figure 2, The guide sleeve 11 is made integrally with the ring-shaped pressing piece 7. The female circle of this pressing piece The cone 9 acts on the second male cone 8 of the collet 1.

Unlike FIG. 1, in the embodiment of FIG. 2, the pressure adjustment screw 24 is tightened by the nut 6. Rather, it is provided on the guide sleeve 11. As a result, the length of this pressure adjustment screw The hand axis 25 extends in the radial direction.

The chuck 5 is provided with the same number of notches 26 as the number of pressure adjustment screws 24. This cut The depth of the notch increases from the inside to the outside or the chuck is free. When viewed from the end face 27, the tightening becomes gradually shallower toward the nut 6. Pressure adjustment screw 2 4 are each provided with a pin-shaped protrusion 28 at its inner end. This protrusion It engages with a notch 26 provided in the chuck 5.

The pressure adjustment screw 24 or its pin-shaped protrusion 28 cooperates with the attached notch 26, It not only forms the adjusting device of the processing tool 2, but also the ring-shaped pressure piece 7 or the guide. Acts as a relative rotation prevention member for sleeve II, while in the case of Fig. , at least the outer end face 21 and possibly the inner collar 17 of the nut 6. By polishing or smoothing the opposing surfaces of the nut, The tightening of 6 sometimes prevents the guide sleeve 11 from being rotated along with it. Example of FIG. 2 In this case, of course, a relative rotation prevention screw 35 may be provided in addition to the pressure adjustment screw 24. This separates the orientation function and relative rotation prevention function. Preventing this relative rotation The same bottle-shaped end 35 engages in the associated recess 26 without any play. In contrast to this Therefore, the play of the pin-shaped protrusion 2B is large.

The chuck 5 of lA2 is tightened within the unthreaded part of the nut 6, and the cross section is approximately A semicircular circumferential outer groove 29 is provided. Several balls 30 are engaged in this groove. are doing. This ball is tightened by rotating the nut 6 on the chuck 5 and sliding it in the axial direction. Support immobilized. To hold the balls from the outside and eliminate play, each ball 3 A closing member, for example a threaded bottle 32, is screwed into the threaded hole 31 that accommodates the Ru.

An inner groove having a substantially semicircular cross section may be formed in the tightening nut 6. This groove is a groove 29 and both have one hole or threaded hole 32 for receiving a ball 30. be done. For tightening, the male screw 33 that cooperates with the nut screw 15 of the nut 6 is a guide sleeve. 11, particularly at its inner end.

Even in the case of the second embodiment, the processing tool 2 is tightened by rotating the nut 6. , the clamping is held fixed within the collet l. Subsequently, unacceptable rotational runout occurs. In this case, as in the case of the first embodiment, one or more of the pressure adjusting screws 24 screw in and, if necessary, loosen one or more of the other pressure adjustment screws.

Similar to FIG. 2, in FIG. They are connected via 7. This ball engages in the annular groove in the circumferential direction. This annular The groove consists of two halves. In this case, tightening is done by tightening the nut 6 and the guide sleeve 11. each has a half annular groove. The annular groove is spherical at least in the axial direction. It is somewhat larger than the outer diameter of. As a result, the nut 6 is tightened using the guide sleeve. You can perform the necessary movements relative to the body. This movement is in the 1/10 mm range. It is a movement of surroundings. The hole for receiving the ball is closed by a threaded pin 38. Tightening By unscrewing the nut 6, the ball 37 entrains the guide sleeve. this is its only effect.

In order to be able to remove collet 1 from chuck 5 in this way, , a ring 40, for example an elastic retaining ring, is inserted into 1li39 of the guide sleeve 11. ing. This ring engages with the annular groove lO of collet 1 with its hole being eccentric. Therefore, when removing the nut 6, tighten the second male conical part 8 of the collet l. It hits the inner edge.

In FIG. 3, the guide sleeve 11 is directly integrally formed with the nut 6 and the nut screw 15 and the tightening are present between the ridge conical portion 9 of the nut 6. This guide sleeve is small It contacts the cylindrical outer peripheral portion 12 of the chuck 5 with radial play. Chuck An adjustment ring 43 is inserted into the outer groove 42 of No. 5. Assemble this adjustment ring In order to be able to It consists of two ring halves connected together. Adjustment ring is radial and Since it is held with a small play in the axial direction, it can be easily moved on the chuck 5. It is rotatable.

The adjusting ring 43 holds, in particular, a plurality of adjusting screws 44 evenly distributed around the outer circumference. held. This adjustment screw 44 passes through a through hole 45 of the adjustment ring 43, and The screw 46 is opened toward the adjustment ring 43 and tightened to the nut screw 47 of the nut 6. It is embedded. When tightening the collet, the nut 6 may be slightly inclined due to contamination, for example. In order to ensure optimal rotation of the machining tool 2 even if it acts asymmetrically with respect to l, The adjustment screw 44 allows tightening to properly align the nut to the collet 5. be able to. In this case, even if the structure complies with the standard, the tightening is limited to nut 6 and the chain. The threaded joints 15 and 133 between the jacks 5 have a relatively large play. Must be careful. When tightening, align the nut correctly with the collet. As in the case of Fig. 1, while measuring the rotation of the machining tool 2, one or more This is achieved by tightening or loosening the adjustment screw 44 of the .

The head 48 of the adjusting screw 44 is tightened on the end face of the adjusting ring 43 on the side away from the nut. are in contact. In the case of this embodiment, this end face is divided into two parts, so the inside However, in the case of other structures, it may be an outer end face.

As can be easily seen on the basis of FIG. It is possible to form In this case, the adjustment ring cannot rotate relative to the chuck. be. Nevertheless, tightening is possible by screwing in the nut 6 and by using the through hole 45. The nut screw for the adjusting screw 44 is For tightening from the front side, the auxiliary ring that is fitted into the nut 6 must be provided. stomach. When tightening, this auxiliary ring is supported on the outer ring on the right side of the nut as follows. There must be. In other words, in some cases, the nut 6 may be tightened easily at an angle. The necessary tensile force for straightening, and thus the adjustment force, is provided by the adjustment screw 44. It must be supported so that it can be added.

This embodiment also has a hole that is eccentric in the use position, making disassembly easier. A ring 40 is provided. When tightening, insert this ring into the inner groove of nut 6. has been done.

FIG. 4 shows an advantageous variant of the embodiment of FIG. The ring-shaped pressing piece 7 Extending beyond the male cone 8, the extension is provided with an inner collar 51. This inner part is in contact with the pressure ring 52. This pressure ring allows the hole to be closed without any play. It is inserted in 54. Pressure ring and collet l or outside of second male conical part 8 A seal made of an elastic material, especially rubber, soft elastic synthetic resin, etc. is provided between the end face 55 and the end face 55. A ring 53 is provided. At least the shaft of processing tool 2 is fixed This seal ring is compressed as follows. In other words, the protrusion of the processing tool 2 The shaft portion is in close contact with the hole 54 and pressed against the outer end surface 55 due to compression. It is compressed into intimate contact with the inner end surface of the pressure ring 52. this seal ring has the particular purpose of preventing the cooling medium from flowing out. The cooling medium is It is supplied to the machining location via path +00 and a path in the tool 2. The seal ring is further Prevents chips, moisture or liquid from entering the inside of the collet chuck.

In the same way, the tightening of the embodiment of FIG. 1 and the embodiment of FIG. An inner collar 51 is provided, and this inner collar and the outer side of the second male conical portion 8 of both embodiments are provided. The pressure ring 52 and seal ring 53 shown in FIG. 4 can be inserted between the end faces 55. Wear.

In the embodiment shown in FIG. 4, the pressing piece 7 only slides in the direction of the central axis of the collet chuck. The advantage is that the sealing ring 53 is only loaded in the axial direction.

In the case of the embodiments shown in FIGS. 1 and 3, the machining tool 2 is sometimes tightened and the nut 6 is tightened. Due to the rolling movement, the sealing ring can become loaded in the circumferential direction.

The embodiment of FIG. 4 also has the advantage that the sleeve 4 is guided over a long distance. There is a point. All embodiments of the invention have the advantage of high rotational precision. Figure 2 ．． If the guide sleeve 11 only performs sliding movement in the axial direction as in case 4, the machining process will be interrupted. When tightening the tool 2, rotational accuracy can sometimes be obtained unconditionally. The collet has radial accuracy No pressing force is applied that may cause defects.

In FIG. 5, a collet 101 of conventional construction is used as a machining tool 102, such as a milling cutter or a drill bit. It accommodates the shaft of a drill, thread cutter, etc., and holds this shaft firmly. . The collet 101 is a first male cone inserted into the detached cone part 104 of the chuck 105. 103. In this case, of course, the Taber ratios are the same in each case. Chat As is known per se, the hole 105 is attached to a tool spindle (not shown) of a machine tool in a shape-wise manner. and is held therein by known means.

Tightening is accomplished by a nut 106. However, this tightening is It acts on the collet +01 not directly, but via the pressure ring 107. Collet For this purpose, the seat is provided with a second male conical part 108. This male cone is the first male It is shorter than the conical part 103 and its slope is opposite to the slope of the first male conical part 103. be. The second male conical portion 108 engages with the female conical portion +09 of the pressure ring 107. Ru. In this case, both cones have the same angle and their lengths or heights are approximately the same. Ru. As is well known, the collet 101 has longitudinal slits formed at several locations.

A circumferential annular groove 110 is provided between both conical portions 103 and 108. Ko Regarding the longitudinal slit of the let 101, all known longitudinal slits, especially A vertical slit standardized to

According to the invention, a part of the nut is designed as a guide sleeve III.

That is, the guide sleeve is integrally formed. The guide sleeve has a small radius With the play in the direction, the free end portion 1130 of the chuck 105 fits into the cylindrical outer peripheral portion 112. It's embedded. The radial play is on the order of I/100 to 2/100 mm. Ru. A small play between the free end portion 113 and the guide sleeve 1110 and this guide section The relatively long length of the guide sleeve 111 prevents the guide sleeve 111 from tilting into the chuck 105. installed as shown.

The tightening nut +06 has a female thread +15 on the left end in FIG.

With this female thread, the tightening f dimension is determined by screwing the nut into the male thread 116 of the chuck 105. It is possible to Therefore, tightening is done by rotating the nut +06 in one direction. , the pressing ring +07 is pressed against the second male conical part +08 and rotates in the opposite direction. Then, the tightening device will loosen.

Pressure ring +07 has a small play, and tightening away from the screw is done by nut +06. Fitted into the end and tightened so that it can rotate relative to the nut but cannot slide in the axial direction It is Noh. The processing tool 102 is sometimes tightened, and the nut 106 is tightened by the pressure ring 10. It is rotated relative to 7. The pressing ring is the second male conical part 1 of the collet 101. Apply axial pressing force to 08. The axial entrainment is carried out by inserting into the annular groove 157. Multiple balls! This is done via 37. The annular groove is the circumferential groove 15 of the pressing ring 107. 8, and the guide sleeve or fastening facing this circumferential groove is from the thread of the nut 106. and a circumferential inner groove 159 at the remote end. In this case, both grooves Each has a semicircular cross section. Can be closed by a plug, in particular a threaded pin 138 The ball is inserted through the ball insertion hole 160 of the guide sleeve II+. Pressure ring lO The entraining ring +40 is inserted into the radial groove 139 inside 7, especially when it is expanded and inserted. There is. This pressure ring is spaced widely apart on all sides and radially outward of the collet 101. It is engaged in groove +10. This outer groove is provided between both conical parts 103 and 108. There is.

The pressure ring 107 includes an inner rib 151 that projects radially inward. this The inner collar connects the press ring 152 and seal ring 153 to the collet 101. can be pressed against the end face 155 of the outwardly facing end of the. At that time, seal ring ! 53 is in contact with the shaft of the processing tool +02 and the suppression ring 107 on the outside in the radial direction. ing. In the case of a conventional structure, that is, a standardized structure, the collet 101 is Has a radial slit, thereby an arrow! Can be fed to the machine from 63 directions Since lubricating and cooling fluids can flow out radially from this slit in the collet, The axial flow path can be blocked radially outwardly by a sealing ring +53. subordinate Therefore, the liquid must be forced out through the lubrication channels of the machining tool, e.g. the trill. No. This liquid leakage from other passages and gaps is known, for example, to the O-ring. Therefore, it can be prevented.

The radial thread of the guide sleeve 111 has a plurality of holes uniformly distributed in the circumferential direction. Pressure adjustment screw +24 is screwed in. This suppression adjustment is properly formed. t: The inner free end 161 is attached to the outer circumferential surface of the cylindrical outer circumferential portion +12 of the chuck +05. are in contact. After fixing and tightening with this pressure adjustment screw, the processing tool 102 can be corrected within limits. For example, tightening is done using nut 106 and chat. Contaminants are present in the threaded connections 115/116 between the locks 1050, and the contaminants are By shifting the existing radial play to one side, such rotational errors can be avoided. Ru.

A dashed-dotted line 162 indicates that the seal ring 153 and pressure ring 152 are not installed. When tightening is done by tightening the nut 106 or the guide sleeve 111 and the pressure ring 10. 7 shows the shape of its free end, for example. Seallin If a sealing ring 153 is provided, the sealing ring may be made of a spring-elastic material, in particular rubber. It is made of rubber, soft elastic synthetic resin, etc. Furthermore, this seal ring can of course be cut. Prevents debris, moisture or liquid from entering the interior of the collet chuck.

Claims (1)

[Claims] 1. The tightening shaft of the processing tool (2) is housed in the collet (1), and this collet The first male conical part (3) of the machine tool is inserted into the female conical part (4) of the chuck (5) of the machine tool. A tightening nut (6) with a collet (1) mounted on the chuck (5) with a tightening shaft which can be pressed axially into the female cone (4) by In a collet chuck for machining tools, the tightening nut (6) and collet ( A ring-shaped pressing piece provided with a female conical part (9) between the second male conical part (8) of 1) (7) is arranged, this pressing piece has a guide sleeve (11), this guide sleeve The cover fits over the cylindrical outer circumference (12) of the chuck (5) with small radial play. between the tightening nut (6) and the ring-shaped pressing piece (7) or the ring-shaped pressing between the piece (7) or its guiding sleeve (11) and the chuck (5), especially around the A plurality of pressure adjustment screws (18, 24) are provided evenly distributed on the Or, the female conical part (9) of the tightening nut (106) is connected to the collet (101). 2, the tightening nut has a guide sleeve (111). However, this guide sleeve moves with a small radial play into the cylinder of the chuck (105). It covers the shaped outer peripheral part (112) and is connected to the tightening nut (106) in the axial and radial direction. Between the adjusting ring (143) supported by the chuck (105), the A plurality of uniformly distributed adjustment screws (144) are provided or tightened. The female conical portion (109) of the mounting nut (106) is the second male conical portion of the collet (101). In contact with the conical part (108), a part of the tightening nut acts as a guide sleeve (111). The guide sleeve is formed with a small radial play to ensure that the chuck (5) has a circular The female conical part (109) covers the cylindrical outer circumferential part (112) and is the pressing ring (107). to prevent this pressing ring from sliding in the axial direction on the guide sleeve (111). It is rotatably supported and includes a guide sleeve (111) and a chuck (105). In particular, a plurality of radial pressure adjusting screws (1 24) A collet chuck characterized by being provided with. 2. The tightening nut (6) can be screwed into the chuck (5), and the pressure adjustment screw (189 is provided between the tightening nut (6) and the ring pressing piece (7)) The collet chuck according to claim 1, characterized in that: 3. The feeding direction of the pressure adjustment screw (18) is parallel to the collet longitudinal axis (22). Yes, the pressure adjustment screw can be screwed into the tightening nut (6). The collet chuck according to claim 2. 4. Outer end surface (21) of ring-shaped press piece (7) for press adjustment screw (18) A circumferential receiving portion (20) is provided at the engaging end of each pressure adjusting screw (18). Characterized by the fact that the part is tapered into a spherical, truncated conical, or similar shape. A collet chuck according to claim 2 or 3. 5. The tightening nut (6) is rotatably but axially non-slidably attached to the chuck (5). The pressure adjustment screw (24) is supported by the ring-shaped pressure piece (7) or the guide sleeve ( 11) and the chuck (5). Collet chuck in item 1. 6. The feed direction of the pressure adjustment screw (24) is radial with respect to the chuck (5). , the pressure adjustment screw can be screwed into the ring-shaped pressure piece (7) of the guide sleeve (11). 6. The collet chuck according to claim 5, wherein the collet chuck has the following features: 7. The chuck (5) has the same number of radial notches ( 26), and the depth of this notch is such that the chuck (5) is tightened from the free end surface (27). Claim 6, characterized in that the surface becomes gradually shallower toward the nut (6). collet chuck. 8. Each pressure adjustment screw (24) has a pin-shaped projection (28) on its inner end. and this protrusion engages the radial notch (26) attached to the chuck (5). The collet chuck according to claim 7, characterized in that: 9. The chuck (5) includes a groove (29) extending in the circumferential direction and having a substantially semicircular cross section. , several balls (30) are engaged in this groove, each of which has a tightening nut (6). ) is provided in a radial hole (31) that can be closed from the outside. At least one collet chuck according to claims 5 to 8. 10. The head (48) of each adjusting screw (44) is rotatably supported on the chuck (5). The adjustment ring (43) is supported on the end face (49) remote from the tightening nut. , the male thread (46) of the adjustment screw is connected to the nut at the end of the adjustment ring side of the tightening nut (6). Claim 1, characterized in that it can be screwed into the female thread (47) of Collet chuck. 11. The guide sleeve (11) of the tightening nut (6) 5) and its female conical portion (9). Collet chuck of item 1 or item 10. 12. The adjustment ring (43) is divided into two parts in the radial direction, and is located outside the chuck (5). 42, and both parts are connected by a connecting element such as a screw. at least one collet chuck in the desired range of item 1, item 10, or item 11; . 13. A circumferential groove (158) of the press ring (107) and a circumferential groove opposite to this circumferential groove. A plurality of balls (137) extend into a groove (159) inside the guide sleeve (111). ) is inserted into the collet chuck according to claim 1. 14. The radial ball insertion hole (160) of the guide sleeve (111) is particularly suitable for the plug (13). 8) The collet chip according to claim 13, characterized in that Jack. 15. The inner groove (139) of the pressure ring (107) or the guide sleeve (111) ) is inserted into the entraining ring (140), which entraining ring connects the conical part (103, 10 8), there is a large play in the radially outer groove (110) of the collet (101). Claims 1, 13 or 13 are characterized in that they are engaged with each other. At least one collet chuck of item 14. 16. The pressure ring (107) has an inner collar (151), and the inner collar and Between the outer end surface (155) of the second male conical part (108) of the collet (101) , the pressure ring (152) and the seal ring (153) are inserted, and the pressure ring (1 52) is attached to the inner collar (151), and a seal ring ( 152), at least when tightening the shaft of the processing tool (12), Claims 1 or 13 to 15 characterized in that they are in contact with each other. At least one collet chuck in the. 17. The seal ring is made of spring elastic material such as rubber or synthetic resin. The collet chuck according to claim 16, characterized in that: