JPS6334004A - Chuck device for tool of machine tool - Google Patents

Abstract

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

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a chuck device for a tool of a machine tool, in particular a die-sinking and engraving machine. The chuck device includes a chuck, and the chuck is provided with a strip that protrudes from the underside of the chuck, and the strip is further provided with a tool (9) in an X-axis direction and a Y-axis direction perpendicular to the center line of the chuck.
It has a reference surface for centering.

A coupling device is known from the prior art patent application No. 60-80535, which can also be installed in a die-sinking and engraving machine. In the known coupling device, the workpiece is electrically discharged by means of an electrode, which must be connected to the chuck of the spindle of the coupling device. In die-sinking and engraving machines, a coordinate system is established for the machine, the xy plane of which lies perpendicular to the downward movement of the spindle carried out in the Z-axis direction. Also, the center line of the chuck is Z
Extends in the axial direction. In order to set the position of the electrode in the coordinate system, in known coupling devices, a post having a reference surface is attached to the tool (electrode), and the tool is gripped so that the post is fixed to the surface provided on the chuck. At the same time, it is oriented in the Z-axis direction. Furthermore, a prismatic pin is provided on the underside of the chuck, and the prismatic pin engages with the opening in the rotating plate to fix the electrode in the xy plane. Also, the rotating plate is fixed to the electrode. At this time, the center pin of the chuck is inserted into the center hole, and the eccentric pin is inserted into the slot of the rotating plate.

OBJECTS OF THE INVENTION To this end, the present invention provides a method for positioning the tool in a predetermined position on the chuck arbitrarily and frequently and with particularly high precision, without turning the tool into a temporary intermediate connection. It is an object of the present invention to provide a chuck device constructed as described in the introduction. In particular, a reference system is provided that allows accurate assembly of the electrode outside the machine without having to adjust the prepared electrode within the machine.

Furthermore, in the present invention, the chuck device comprises a coupling device that provides for quick coupling and uncoupling of the tool to the chuck.

SUMMARY OF THE INVENTION In the chuck device according to the present invention, several posts protrude from the bottom of the chuck, and x-
A reference surface extending in the y-plane is provided, and the strip is
are eccentrically formed and angularly offset from each other;
The tool holder further includes a tool holder having a flat surface abutting the post, and forming in said surface two pairs of grooves aligned with the strip and having a resilient lip abutting the strip; has a central hole provided with a locking member for lockably and unlockably receiving a set bolt. Thereby, the opposing references in the X-, Y- and Z-axes on the tool holder are located in one common plane, i.e. in the surface of the tool holder, which allows for easy and extremely accurate assembly of the tool. becomes possible.

The tool is fixed in a tool holder on the side facing the surface and precisely shaped outside the machine tool. Therefore, in the present invention, it is desirable that the side surfaces or edges of the tool holder are accurately aligned in the X-axis direction and the y-axis direction. The tool fixed to the tool holder is then gripped by the chuck by a set bolt inserted into the chuck. At this time, the surface of the tool holder serves as a counter-reference for the post, and the groove serves as a counter-base thread for the strip.

Preferably, the chuck is provided with two pairs of strips, the joining lines of one pair of strips being orthogonal to the joining lines of the other pair of strips, and the strips of each pair facing each other with respect to the center of the surface.

Particular advantages can be obtained if the tool holder is provided with at least two flanks, one of which is exactly flush with the first pair of grooves and the other with the second pair of grooves. can get. This facilitates the use of the tool holder for measurements of the tool outside the machine in a machine-specific coordinate system.

In a preferred embodiment of the invention, the locking member comprises at least one stem projecting into the central hole and further includes at least one radially projecting stem at the lower end of the set bolt for downward gripping of the stem. Nose portions are formed. Furthermore, an axially slidable slider may be held on the set bolt near the lower end of the set bolt. By simply inserting the set bolt into the center hole of the lower end of the set bolt and rotating the bolt until the stem is below the nose of the set bolt and gripped from below, the set bolt can be quickly and securely attached to the tool holder. They are connected and locked, for example, via a slider that engages with a recess in the tool holder.

In a preferred embodiment of the invention, the set bolt is required to rotate approximately 45 degrees when forming each stem between two circumferentially adjacent grooves in the center hole. In order to exclude the influence of the reference means formed in the tool holder via the locking of the set bolt, it is advantageous for the bottom of the central hole to be located at least the thickness of the nose deeper than the bottom of the groove.

Furthermore, the lower end of the set bolt is provided with four nose portions arranged at equal intervals in the circumferential direction, and the circumferential width of each nose portion is adjusted to fit the circumferential space between two adjacent stems, especially the groove. It is advantageous that it is no larger than the internal width.

It is particularly advantageous to form the slider as a ring surrounding the set bolt. At least one, and preferably four, circumferentially equally spaced fingers extend axially from the ring toward the lower end of the set bolt, the circumferential width of each finger being adjacent. Corresponds to the distance between the nose parts.

When the slider or ring is non-rotatably held on the set bolt, operation of the slider or ring is simplified. Four equally spaced guide grooves are formed projecting from the periphery of the lower end of the set bolt, and each finger has a radially thickened portion sunk into each guide groove. In order to lock the ring to lock the connection between the set bolt and the tool holder, at least one of the guide grooves is axially shorter than another guide groove, and at least one of the shorter guide grooves is It is desirable that the fingers sunk into the guide groove have elasticity in the radial direction.

The invention has particular value in the assembly of electrodes for electrical discharge machining of workpieces using die sinking and engraving machines.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, one embodiment of the structure of the present invention will be explained with reference to the accompanying drawings.

The chuck device according to the present invention mainly consists of three components: a chuck l having a set bolt hole in the center and a base member on the lower side; and a chuck l having a flat surface and a groove on the upper side. Electrode holder 2) A cent bolt 3 connectable to the electrode holder 2.

The electrode holder 2 is square in plan view, and
Two pairs of parallel opposing sides 22, 24, 26 and 28 are covered. The first pair of sides 22 and 24 extend exactly in the X-axis direction, and the second pair of sides 26 and 28 extend exactly in the X-axis direction. The flat ground surface 30 is parallel to the x-y plane and thus perpendicular to the side surfaces 22, 24, 26 and 28. On the upper side of the electrode holder 2, two pairs of i32, 34, 36 and 38 are formed, each having the same orthogonal cross section. The first pair of grooves 32 and 34 are symmetrical with respect to a center plane 4 including the X-axis direction of the electrode holder 2, and are arranged in a center hole 40 and a side surface 26 of the electrode holder 2, respectively.
and 28. Also, a second pair of grooves 36 and 38
are symmetrical with respect to the central plane 5 including the X-axis direction of the electrode holder 2, and have a central hole 40 and side surfaces 22 and 24, respectively.
extending between.

With respect to the surface 30, the groove 32 has opposite edges 32a and 32b with respect to the central plane 4, and the groove 34 has opposite edges 34.
It has a and 34b. Similarly, for surface 30, groove 3
6 has opposite edges 36a and 36b with respect to the central plane 5, and groove 38 has opposite edges 38a and 38b. Grooves 32, 34, 36 and 38 divide the surface 30 into four surface sections 30.
Divide into a, 30b, 30c and 30d. Surface portion 30a
are arranged at the corners formed on the upper side of the electrode holder 2 by the side surfaces 22 and 26.

Similarly, the surface portion 30b has electrode boulders 2 on side surfaces 26 and 24.
It is arranged at a corner formed on the upper side of the surface part 30c.
is disposed at a corner formed on the upper side of the electrode holder 2 by the side surfaces 24 and 28, and further, the surface portion 30d is disposed at a corner formed on the upper side of the electrode holder 2 by the side surfaces 28 and 22.

On each side of the WII32, 34.36°38 emanating from each of the above-mentioned edges, a slightly downwardly curved slot is cut into the material of the electrode holder 2 at about one third of the depth of the groove. be done. The slot has a depth that roughly corresponds to the groove width. Each slot has a length that is at least the same as the length of the corresponding edge.

Two opposing slots 31a and 31b emanate from groove 32 and two opposing slots 33a and 33b emanate from groove 34.
emanate from the groove 36, two opposing slots 35a and 35b, and from the groove 38 two opposing slots 37a and 37b. In FIG. 2, the inner ends of the slots are labeled with the above reference numerals.

Due to the slot, the material of the electrode holder 2 located between the slot and the adjacent surface part Z
It becomes possible to take a lip shape that has elasticity in the axial direction. Lip portions 32c and 32d face each other on both sides of the groove 32,
Lip portions 34c and 34d face each other on both sides of the groove 34, and
Lip portions 36c and 36d face each other on both sides of the groove 36, and lip portions 38c and 38d face each other on both sides of the groove 38.

As shown in FIG. 6, an electrode 9 can be fixed to the lower side of the electrode holder 2. In order to secure the electrode 9, a through hole can be provided in each of the four surface parts 30a-30d for a bolt, for example a bolt 15, by means of which the electrode 9 can be screwed onto the electrode holder 2. The exact configuration of each through hole 42, 44, 46 and 48 will be further described below.

When the electrode 9 is screwed, the bolt 15 will be attached to the surface 3.
Each through hole 42°44.4 so that it does not protrude from 0.
6 and 48 enlarge the diameter on the upper side of the electrode holder 2.

The chuck 1 connected to a die-sinking and engraving machine has a lower side formed as follows in FIGS. 1 and 3. The chuck l has a cylindrical external contour on its underside. On the underside of the chuck l, the annular surface 50 is ground exactly flat so that the annular surface 50 is parallel to the x-y plane, ie at right angles to the center line 1a of the chuck 1. The annular surface 50 surrounds the circular surface 51, and there is no need to impose any special conditions on the surface finish of the circular surface 51. A set bolt hole IO is opened at the center of the circular surface 51. As shown by the dotted lines in FIG.
The square surface 30 of the electrode holder 2 is aligned in the X-axis direction and with respect to the outer diameter of the annular surface 50 and the outer diameter of the circular surface 51 so that it is located completely inside the circular surface 51 and completely outside the circular surface 51. Measured in the y-axis direction.

Between the respective projections 22a, 24a, 26a and 28a of the side surfaces 22, 24, 26 and 28 onto the annular surface 50 and the periphery of the circular surface 51, the central plane 6 including the X-axis direction of the annular surface 50 and the y-axis Annular surface portions 50a, 50b,
There are four regions giving rise to 50c and 50d. Projecting from each of the four annular surfaces are posts 52, 54, 56, and 58 of cylindrical cross section. The post can be integrally formed with a chuck portion 72 that includes an annular surface 50. Alternatively, a hole may be drilled in the center of the post to receive the machine screws 53, 55, 57 and 59, so that the machine screws do not protrude from the front annular reference surfaces 52a, 54a, 56a and 58a. Make it. The reference surface is made very narrow by the corresponding chamfers to the through holes and the outer periphery of each post. Furthermore, the reference surface 52a,
54a, 56a and 58a are ground flat to form annular surface 5.
0 and located exactly parallel to the xy plane. When the electrode holder 2 is pressed against the reference surface at the surface 30, the reference surfaces 52a, 54
a, 56a and 58a, together with each other, form an axial reference for the precise positioning of the electrode 9 on the electrode holder z.

Projecting from the circular surface 51 between the set bolt hole io and the periphery of the circular surface 51 are two pairs of identical strips 62, 64, 66 and 68, each of approximately right-angled cross section. Each of the first pair of strips 62 and 64 is arranged symmetrically about the central plane 6 and each of the second pair of strips 66 and 68 is arranged symmetrically about the central plane 7. The strip is formed of the material of the chuck portion 72. Since the contours of the strips are the same, only the contour of strip 62 will be described in detail below.

The strip 62 has three pairs of flat sides extending perpendicular to the circumference of the circular surface 51 and symmetrically to the central plane 6 . Side surfaces 61a and 61 adjacent to the circular surface 51
b extends approximately perpendicularly to the circular surface 51. side 61
The side surfaces 63a and 63b adjacent to a and 61b are only slightly inclined with respect to the central plane 6. Also, strip 62
The side surfaces 65a and 65b extending between the front surface 62a and the side surfaces 63a and 63b form a large angle with the central plane 6, for example about 4
Forms the fifth degree. The side surfaces 63a and 63b serve as reference surfaces for accurate positioning of the electrode holder 2 in the xy plane. For this purpose, from the side surfaces 61a and 61b to the side surface 63
The distances from the annular surface 50 of the transition points to a and 63b are smaller than the distances from the reference surfaces 52a, 54a, 56a and 58a to the annular surface 50. On the other hand, the distance from the annular surface 50 of the transition point from the slightly inclined side surfaces 63a and 63b to the largely inclined side surface is determined by the reference planes 52a, 54a,
It is larger than the distance of each of 56a and 58a from the annular surface 50. Obviously, the height of the front surface 62a above the annular surface 50 is set such that the bottom of the groove 32 does not come into contact with the strip 62 when the electrode holder 2 is fixed to the chuck l.

When fixing the electrode holder 2 to the chuck 2 via the set bolt 3, the reference surfaces 52a, 54a, 56a and 58a correspond to the annular support surfaces 4 of the surface portions 30a, 30b, 30c and 30d.
2a, 44a, 46a and 48a, the electrode holder 2 is reliably positioned in the Z-axis direction. at the same time,
The strips 62, 64, 66 and 68 are fitted with grooves 32, 34° 36 and 38, respectively, with greatly inclined sides 65a and 65b.
Inserted. Further, the slightly inclined side surfaces 63a and 63b come into contact with the edges 32a and 32b, while as the fixing work progresses, the lip portions 32c and 32d are formed so that the electrode boulder 2
bends inward in the axial direction until it occupies a fixed axial position (
Figure 4).

In this way, the electrode holder 2 is precisely positioned in the Z-axis direction and simultaneously in the X-axis direction, so that the strips 62, 64, 66 and 68 respectively
and 38. At that time, lip portions 32c, 32d:
34c, 34d; 36c, 36d and the dynamic fixation of the electrode holder 2 based on the elasticity of 38C138d eliminates any play. In order to manufacture the standard to be applied to the electrode holder 2,
Edges 32a, 32b; 34a, 34b: 36a, 36b without having to change the adjustment of the machine equipped with the electrode holder 2.
and 38a, 38b are advantageously formed simultaneously with the formation of surface 30.

Edges 32a, 32b; 34a, 34b; 36a, 36b
and 38a, 38b are particularly hardened, as are the portions of the strip with reference surfaces and the posts that contain the reference surfaces. In FIG. 3, for this purpose, the strip 68 has a top portion 68a of hard metal or tungsten carbide.
Reference surfaces 67a and 69a are formed with respect to the top portion 68a.

This fixed position of the electrode holder 2 is such that the electrode holder 2 has a flat surface 30 and, moreover, the reference surface for the measurement of the electrode 9 in the assembly of the electrode 9 outside the engraving/engraving machine is just a plane surface. It has 11 points that it is possible to use sides i22.24.26 and 28 set precisely in the direction of the X-axis and the direction of the Y-axis.

Each of the through-holes 42, 44, 46 and 48 is arranged in a respective region of the corresponding surface portion 30a, 3'Ob, 30c and 30d, and the surface portions 30a, 30b, 30c and 30d are located on the support surface 42.
a, 44a, 46a and 48a.

Thereby, a corresponding positioning of the electrode 9 is directly carried out by precisely fixing the electrode holder 2 in the Z-axis direction.

In the above embodiment of the invention, grooves 32, 34, 36 and 3
8 reaches the central hole 40 of the electrode holder 2. Walls 40a, 4 of the central hole 40 located between two adjacent grooves
0b, 40c and 40d project within the central bore 40 along its axial thickness (FIGS. 2 and 7) to form tongues 102, 104, 106 and 108. The tongue-shaped portion functions as a stop member when fixing the set bolt 3 to the electrode holder 2.

In FIG.
2. An annular surface 50 is formed on the lower side of the chuck portion 72. The chuck portion 72 is fixed to a plate 74 on the machine side with bolts.

Plate 74 has a central blind hole 76 that is coaxial with set bolt hole 10 and surrounded by an annular wall 78 . An annular space is formed between the wall 78 and the inner side of the chuck portion 72 in which a retaining ring 80 shown in FIG. 6 is accommodated so as to be movable in the axial direction. A spring 82 supported on the inner bottom of chuck portion 72 urges retaining ring 80 into the locked position shown in FIG. Retaining ring 80 is guided in its axial movement by the outer surface of sidewall 78 and the opposing inner surface of chuck portion 72 . The retaining ring 80 is further guided on the outer surface of a guide ring 84. The guide ring 84 is fixed to the center hole forming the set bolt hole 10 of the chuck portion 72 and extends in the direction toward the wall 78. Between the wall 78 and the guide ring 84 are held balls 86 and 88 which are similarly arranged around the set bolt hole 10.

Balls 86 and 88 escape radially outwards in a downward movement of retaining ring 80 by means of a recess with a conical surface in retaining ring 80, releasing head 90 of set bolt 3. The set bolt 3 includes a small diameter portion 92 below the head 90. In the upward movement of retaining ring 80, balls 86 and 88
is pushed into the small diameter portion 92 by the retaining ring 80, and the set bolt 3 is held in the axial direction.

According to the invention, the annular compressed air chamber 94
Formed below 0. The compressed air chamber 94 can be connected to a source of compressed air via a passage 96 passing through the sleeve 97 of the chuck part 72 . Furthermore, compressed air chamber 94
The igl passage 9 passes through the bottom of the chuck part 72.
8, and the passage 98 is followed by a compressed air passage 51a of machine screws 53, 55, 57 and 59. The passageway 96 is connected to a source of compressed air, and the retaining ring 80 is further urged into the locked position by the action of the spring 82. At the same time, the compressed air escapes through the compressed air passage 51'a, and the support surfaces 42a, 44 of the part on which the electrode holder 2 is fixed are placed.
a, 46a and 48a. When the electrode holder 2 is fixed to the chuck l, compressed air flows through the compressed air passage 51a.
The retaining ring 8 can be prevented from escaping further through the
0 closing pressure increases. This increases the bonding force of the chuck of the electrode holder 2 to the electrode and the set bolt by about three times.

In the above configuration, it is no longer necessary to provide the spring 82, and the spring 82 alone can be configured to apply the necessary contact pressure against the reference surface to press the electrode holder 2 holding the electrode 9. .

On the other hand, the spring 82 is provided from a safety perspective to ensure that the electrode holder 2 will not close to the set bolt 3 in the event of a malfunction of the compressed air source.
In addition, it can also be configured to prevent it from accidentally falling from the chuck l.

To remove the electrode holder 2 with the set bolt 3, the upper side of the retaining ring 80 is communicated via passages 91 and 93 with a source of compressed air, the pressure of which is applied by the force of the spring 82 when the closing air pressure is removed. and brings the retaining ring 80 downward to the released position.

At this time, the balls 86 and 88 in the recess of the retaining ring 80 escape outwardly, freeing a passage for the head 90 of the set bolt 3.

The set bolt 3 has a generally cylindrical shape except for some radial grooves, and an annular groove 8 for sealing (not shown)
Only the lower part of will be described below (FIGS. 8-10).

The cylindrical lower part 11 has two opposing outer peripheral parts, respectively.
It has flat parts 12 and 13. In the flat parts 12 and 13, the set bolt 3 can be gripped, for example, by the forks of a grip and transported by the forks. Below the flats 12 and 13, the set bolt 3 has a length slightly greater than the depth of the central hole 40. Lower end 1 of set bolt 3
4, four circumferentially equally spaced nose portions 112, 114, 116 and 118 project radially outwardly. The nose portions 112, 114, 116 and 118 have a circumferential length not greater than the width of the grooves 32, 34, 36 and 38. Nose parts 112, 114, 116 and 1
18 does not project radially outwardly enough to reach the inner diameter of the central hole 40 at its lower end. Between each two adjacent nose parts 112, 114, 116 and 118, guide grooves 111, 113, 115 and 117, which have the shape of a flat part of the cylindrical outer contour of the lower part 11, are provided for the setting bolt 3. It is formed so as to emanate from the front surface 3b. Two opposing guide grooves 111 and 115, each extending parallel to the flats 12 and 13, are arranged axially in front of the corresponding flats 12 and 13, as illustrated for the guide grooves 111 in FIG. Separate and end. Another two opposing guide grooves 113 and 117 correspond to guide groove 1 in FIGS.
As can be seen at 17, it extends further axially from the front face 3b and ends at the level of the flats 12 and 13.

The lower part 11 of the set bolt 3 is entirely surrounded by a slider designated with reference numeral 150.

In this embodiment, the slider 150 has the shape of a stop ring made of, for example, synthetic resin and equipped with fingers. The slider 150 is axially slidable on the lower part II and comprises a circular radially projecting grip part 152 above the fingers. From the grip part 152, four fingers 142 are arranged at equal intervals in the circumferential direction.
, 144, 146 and 148 extend downwardly. The finger abuts the side surface of the lower part 11 with its inner surface. finger 1
42° 144, 146 and 148 each correspond to two adjacent nose portions 112. L14. It virtually completely occupies the space between l16 and l18. Finger I42°144.1
Each of 46 and 148 has a thick portion extending from the lower end on the back side, and each of the thick portions is connected to the guide grooves 111 and 11.
3, 115 and 117, respectively.

At this time, the opposing fingers 142 and 146 are always connected to the corresponding guide grooves 113 and 117 through their thick parts on the back side.
is engaged with. On the other hand, in the elastic fingers 44 and 148 that face each other in the radial direction, the thick portions on the back side engage with the shorter guide grooves 115 only in the locked position shown in FIG. However, in the raised unlocked position shown in FIG. 8, fingers 144 and 148 have slid upwardly out of guide grooves 111 and 113. The maximum width of each of the fingers 142, 144, 146 and 148 is in any case smaller than the width of the grooves 32.degree. 34.36 and 38.

Thick parts on the back side of fingers 142 and 146 and guide groove 11
3.117, the slider 150 is held on the lower part ll of the set bolt 3 so as not to be rotatable but slidable in the axial direction.

The set bolt 3 with the slider 150 is attached to the electrode holder 2.
The lower part +1 is inserted into the central hole 40 to connect each of the nose parts 112, 114, 116 and 118 to
Between the tongues 102, 104, 106 and 108 there is a groove 32.
34. Center hole 40 in the space formed through 36 and 38
can be pushed all the way to the bottom. If the slider 150 is not in the raised position from the beginning, insert the set bolt 3 into the center hole 4.
Fingers 142.144. when further inserted into 0. I46
and the underside of 148 and tongues 102, 104, 106 and 10
8, the slider 150 is pushed up in the axial direction on the center bolt 3 to the raised position shown in FIG. Then, the set bolt 3 is placed in the central hole 40 at approximately 45°, in any case, the fingers 142° 144. rotated so that it can be inserted into the The slider 150 is then manually pushed downward on the lower part 11 in the locking position shown in FIG. 9, thereby being located between the fingers or tongues and preventing further rotation of the set bolt 3. do.

In this position of the set bolt 3, the fingers 142
, l 44 , l , i 6 and 148 support each of the tongues 102, 104, 106 and 108 from below. In this way, the cent bolt 3 is attached to the electrode holder 2.
Then, the electrode holder 2 and the electrode holder 2 are inserted into the chuck l of a die-sinking and engraving machine.

For uncoupling, the slide 150 is manually moved axially upwards on the lower part 11 through a grip part 152 which can reach above the upper large diameter part of the groove and the central bore. At this time, the fingers 144 and 148 may be slightly separated from the guide grooves 111 and 115 due to their own radial elasticity. The set bolt 3 can then be rotated until it disengages from the nose or tongue, so that the set bolt 3 can be freely removed upwardly from the electrode holder 2.

The above locking mechanism for connecting the cent bolt 3 and the electrode holder 2 is not limited to the special formation of the slider 150. Alternatively, a simpler slide may be provided which is slidably fixed axially on the lower part 11 and which slide has a radial recess provided in one of the grooves or in one of the tongues in the locking. It may be configured to engage in a locking manner in the circumferential direction.

Additionally, in the present invention, the slider 150 is elastically biased by one or more spring members toward the locked position shown in the lower part of FIG. 150 escapes upward against the spring force,
After the set bolt 3 is rotated, the slider 150 may be configured to automatically move to the lock position by the action of a spring.

Furthermore, it is also possible to configure the nose and the tongue to cooperate in such a way that they are removably connected to the electrode holder 2 by means of a set bolt 3 or a bayonet joint.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the lower side of the chuck on the machine side of the chuck device according to the present invention, Fig. 2 is a plan view of the upper side of the electrode holder with the cent bolt removed, and Fig. 3 is a partial plan view of the chuck. This is a cross-sectional view of the electrode holder fixed to the chuck with the set bolt, and Fig. 4 is an enlarged detailed view of the part surrounded by the dot-dash line circle in Fig. 3, and Fig. 5 is the set bolt fixed to the chuck. FIG. 6 is a cross-sectional view of the chuck that fixed the electrode holder, and FIG. 7 is a diagram of the second electrode holder.
FIG. 8 is a cross-sectional view taken along the line ■-■ in the figure, and FIG. 8 is a view of the 1-g Fh holder provided with a locking member partially shown in cross section and cut in the X-axis direction, and FIG. is a view of the set bolt rotated by 90 degrees from FIG. 8 and the electrode holder cut in the y-axis direction, with the locking member engaged, and FIG.
It is a figure which looked at Holt from below. ■... Chuck, 2... Electrode holder, 3. Set bolt, 9... Electrode, 10... Set bolt hole, 11. Lower part, 12.13
... Flat part, 15 ... Holt, 22.24.26.
28... Side, 30... Surface, 32.34.36,3
8 - groove, 40...center hole, 42.44.46.48
...Annular surface, 52.54.56.58 Post, 62.64.66.68...Strip, 72...
Chuck part, 74... plate, 80... retaining ring,
82...Spring, 84...Guide ring, 86.88
・Ball, 102.104.106.108... Tongue, 111.113.115, 117... Gaiton Samurai,
+12.114,116.118 ・Nose part, +4
2.144, 146.148...Finger, 150.
...Slider, 152...Grip part. Patent Applicant: 3 Al Management Actier Boraget Agent Patent Attorney: 2 people including the above person Vw

Claims (27)

[Claims] (1) A chuck device for a tool (9) of a machine tool, in particular a die-sinking and engraving machine, comprising a chuck (1) and two pairs of strips (62, 64, 66, 68) is provided on the chuck, and the strip is further provided with a tool (
9), and a plurality of posts (52, 63b) from the underside of the chuck (1).
54, 56, 58) protrude, and reference surfaces (52a, 54a, 5
6a, 58a), and the strips are formed eccentrically and angularly offset from each other, and the tool holder (30) has a flat surface (30) abutting the post.
2) and on the surface (30) two pairs of grooves (3) provided with elastic lips abutting the strips (62, 64, 66, 68) and aligned with the strips.
2, 34, 36, 38), while the tool holder (
2) is a center hole (40
) A chuck device comprising: (2) In the chuck device according to claim 1, the tool holder (2) has two side surfaces (22, 24;
26, 28), and one side (22, 24) is provided with a first
extending exactly parallel to the pair of grooves (32, 34);
Also, the other side surface (26, 28) has a second pair of grooves (36, 28).
38) A chuck device characterized in that it extends exactly parallel to the chuck device. (3) In the chuck device according to claim 1 or 2, the post (52, 54, 56, 58)
A chuck device characterized in that: are fixedly spaced at regular intervals on the annular surface (50) on the lower side of the chuck. (4) In the chuck device according to any one of claims 1 to 3, the reference surface (52a, 54a
, 56a, 58a) are each a narrow annular plane. (5) In the chuck device according to any one of claims 1 to 4, each of the posts surrounds an axial compressed air passageway (51a), and the compressed air passageway further extends through the chuck (51a). A chuck device characterized in that it is connected to a compressed air source connected to 1). (6) In the chuck device according to any one of claims 1 to 5, the set bolt hole (10)
a retaining device (80) for the set bolt (3) surrounding the
in the chuck (1), and further characterized in that the holding device has a compressed air chamber (94) connected to a compressed air source for fixing the set bolt (3). (7) The chuck device according to claim 5 or 6, characterized in that the compressed air passage (51a) is connected to the compressed air chamber (94). (8) In the chuck device according to any one of claims 1 to 7, the grooves (32, 34, 36,
38) are edges that cooperate with the contact surfaces (63a, 63b) inclined with respect to the central axis of the tool holder (2) so as to align the tool holder (2) in the x- and y-axis directions; Department (
32a, 32b; 34a, 34b;...). (9) In the chuck device according to any one of claims 1 to 8, each of the grooves has two opposing lip portions (32c, 32c,
32d; 34c, 34d; 36c, 36d; 38c, 3
A chuck device characterized by forming 8d). (10) In the chuck device according to any one of claims 1 to 9, the reference surface (52a, 54
a, 56a, 58a) from the annular surface (50) in the z-axis direction is located within the width of the contact surface (63a, 63b) in the axial direction. (11) In the chuck device according to any one of claims 1 to 10, the post (52, 54
, 56, 58) to the strips (62, 64, 66, 68
) A chuck device characterized in that it is disposed radially outward. (12) A chuck device according to any one of claims 1 to 11, characterized in that each post is disposed between two adjacent strips. (13) In the chuck device according to any one of claims 1 to 12, the set bolt (3)
A chuck device characterized in that it is held in a center hole (40) by a insertion joint. (14) In the chuck device according to any one of claims 1 to 13, the tool holder (2) has holes (42, 44, 46, 4
8), and further includes holes (42, 44, 46, 48),
Chuck device, characterized in that it is arranged inside the support surface of the surface (30) cooperating with the reference surface (52a, 54a, 56a, 58a). (15) In the chuck device according to any one of claims 1 to 14, each of the strips is provided with a charging portion made of a hard alloy or tungsten carbide, and further includes a charging portion in contact with the charging portion. A chuck device characterized in that surfaces (63a, 63b) are formed. (16) In the chuck device according to any one of claims 1 to 15, the locking member includes at least the tongue-shaped portions (102, 10) that protrude into the center hole (40).
4, 106, 108) and at least a nose portion (112, 11) protruding in the radial direction at the lower end of the set bolt.
4, 116, 118), and further comprising an axially slidable slider (150) held on the set bolt near the lower end of the set bolt. (17) In the chuck device according to claim 16, each of the tongue-shaped portions is connected to one of two grooves (32, 34, 36, 38) adjacent to each other in the circumferential direction of the center hole (40). A chuck device characterized in that a chuck device is formed in between. (18) In the chuck device according to claim 16 or 17, the center hole (40) is formed deeper than the grooves (32, 34, 36, 38) in the tool holder (2). A chuck device featuring: (19) In the chuck device according to any one of claims 1 to 18, the four nose portions arranged at equal intervals in the circumferential direction are attached to the lower end (
14), further characterized in that the circumferential width of each of the nose portions is not greater than the circumferential space between two adjacent tongues. (20) The chuck device according to any one of claims 1 to 19, characterized in that the tool holder (2) is provided with a recess that engages with the slider (150). . (21) In the chuck device according to claim 20, the recess is one of the grooves (32, 34, 36, 38), and the slider (150) corresponds to the inner width of one of the grooves. A chuck device characterized in that it has a circumferential width. (22) In the chuck device according to any one of claims 1 to 21, the slider is a ring (150) surrounding the set bolt (3), and further includes:
A chuck device characterized in that at least one finger (144, 146, 148) extends axially from the ring towards the lower end (14) of the set bolt (3). (23) In the chuck device according to claim 22, the ring includes four fingers arranged at equal intervals in the circumferential direction, and further, the circumferential width of each finger is equal to that of one of the grooves. A chuck device characterized by being compatible with the inner width. (24) The chuck device according to any one of claims 1 to 23, wherein the slider is held non-rotatably by a set bolt. (25) In the chuck device according to claim 24, four guide grooves (111, 113, 115) arranged at equal intervals around the lower end (14) of the set bolt are provided.
, 117), and at least one of the fingers (142, 146) having a thickened radial portion is sunk into one of the guide grooves. (26) In the chuck device according to claim 25, at least one of the guide grooves (111, 115)
The chuck is characterized in that the fingers (144, 148) that are sunk in the shorter guide grooves have elasticity in the radial direction. Device. (27) In the chuck device according to any one of claims 1 to 26, the slider (150)
A chuck device characterized in that the chuck device is elastically biased to a lock position by a spring member.