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WO2000059660A1 - Douille rotative - Google Patents

Douille rotative Download PDF

Info

Publication number
WO2000059660A1
WO2000059660A1 PCT/JP1999/003085 JP9903085W WO0059660A1 WO 2000059660 A1 WO2000059660 A1 WO 2000059660A1 JP 9903085 W JP9903085 W JP 9903085W WO 0059660 A1 WO0059660 A1 WO 0059660A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide bush
peripheral surface
bar
inner peripheral
support
Prior art date
Application number
PCT/JP1999/003085
Other languages
English (en)
Japanese (ja)
Inventor
Shigeo Hasegawa
Sousaku Kimura
Shinji Horikoshi
Original Assignee
Citizen Watch Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co., Ltd. filed Critical Citizen Watch Co., Ltd.
Priority to JP2000609208A priority Critical patent/JP4330277B2/ja
Publication of WO2000059660A1 publication Critical patent/WO2000059660A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B13/00—Arrangements for automatically conveying or chucking or guiding stock
    • B23B13/12—Accessories, e.g. stops, grippers
    • B23B13/123—Grippers, pushers or guiding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B23B31/201—Characterized by features relating primarily to remote control of the gripping means
    • B23B31/202—Details of the jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/20—Collet chucks
    • B23B2231/2048—Collets comprising inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/022—Balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/116—Rollers or rolls

Definitions

  • the present invention relates to a guide bush for supporting a bar being turned in the vicinity of a portion to be machined, and more particularly, to a guide bush having a hollow cylindrical bar supporting portion surrounding a rotation axis and being supported by the bar supporting portion.
  • a guide bush having a hollow cylindrical bar supporting portion surrounding a rotation axis and being supported by the bar supporting portion.
  • the present invention relates to an automatic lathe provided with such a rotary guide bush.
  • a guide bush is known as an auxiliary support device for supporting a bar-shaped workpiece material (hereinafter, referred to as a bar material) in the vicinity of a portion to be machined at its tip.
  • Guide bushes support the bars so that they do not run out during machining during turning, thereby enabling high-precision machining of products from relatively elongated bars. is there.
  • a fixed guide bush fixedly arranged with respect to a rotating bar and a rotary guide bush rotatably arranged with the bar are known. It is selected and used as appropriate.
  • the fixed type guide bush has a bar support having a slotted structure, and the cylindrical inner peripheral surface of the bar support supports the outer peripheral surface of the bar in a sliding manner as a sliding bearing surface.
  • the rotary guide bush is also provided with a bar support having a slit structure, and the inner peripheral surface of the bar support is brought into contact with the outer peripheral surface of the bar to be shared with the bar. To rotate.
  • An automatic lathe having a configuration in which a rotating main spindle held moves in an axial direction is well known.
  • the guide bush is used for both the fixed type and the rotary type in a state where the rod is centered and supported (that is, the rod axis is aligned with the rotation axis), and It is required that the rod material sent in the axial direction by the axial movement can be slidably supported.
  • the bar to be machined is inserted into the guide bush before starting the machining operation, and the diameter of the inner peripheral surface of the bar support is adjusted to the outside diameter of the bar in advance. It is adjusted so that both centering support of the bar and axial sliding support can be achieved.
  • a drawn material round bar drawn to a specified diameter as it is as a bar material processed by a lathe
  • Abrasives may be used.
  • as-drawn material has low outer diameter dimensional accuracy as it is, and variations in the outer diameter of a single drawn material in the longitudinal direction and variations in the outer diameter between many drawn materials of the same nominal diameter are generally reduced. Some are not only large, but also undulate or bend along the length.
  • a drawn material that is inexpensive compared to an abrasive is often used.
  • there is a material that is difficult to grind for example, aluminum, copper, etc.). In that case, a drawn material is necessarily used.
  • the bar When a drawn material is used as a bar, the bar is set to prevent slippage in the axial direction between the chuck of the rotating spindle and the bar, and against the frictional resistance of the guide bush.
  • the rod since the rod is fed against a great amount of frictional resistance, there is a concern that the components of the guide bush may be worn out and deteriorated quickly.
  • the chuck components if the stress concentrates under a strong holding force, and if the chuck and the bar material slip under such holding force, There is a further concern that wear and deterioration will be accelerated.
  • an object of the present invention is to provide a rotary guide bush installed on an automatic lathe, in which a drawn material having a low outer diameter dimensional accuracy is used as a bar even when the bar is fed to the bar support.
  • High-precision processing of products is realized by reducing the frictional resistance generated between the bar and the outer peripheral surface, and eliminating unnecessary gaps that can occur between the bar support and the outer peripheral surface of the bar.
  • the purpose is to provide a rotating guide bush that can be used.
  • Another object of the present invention is to suppress the wear and deterioration of the guide bush itself and the components of the chuck of the rotating spindle, thereby increasing the life of the components and reducing the cost related to maintenance. It is to provide a rotary guide bush that can be used.
  • Still another object of the present invention is to provide a rotary guide bush that has such an extremely advantageous function and can be manufactured at low cost.
  • Still another object of the present invention is to provide a high-performance automatic lathe provided with such a rotary guide bush and capable of processing and forming a product with high accuracy even when a drawn material is used as a bar. Is to do.
  • the present invention provides a rotary guide bush having a hollow cylindrical bar support surrounding a rotation axis, which is locally formed on an inner peripheral surface of the bar support. With projections, projections on the inner circumference
  • a rotary guide bush characterized by supporting a bar at a position away from a surface.
  • the contact area between the projection and the rod outer peripheral surface is compared with the contact area between the cylindrical inner peripheral surface and the rod outer peripheral surface of the rod support portion in the conventional guide bush.
  • the bar can be supported under a sufficiently small contact area between them. Therefore, while the bar supported by the guide bush is sent in the axial direction along the bar support, the outer diameter of the bar inherently varies in the longitudinal direction due to the bending. Therefore, even if the projections may bite into the outer peripheral surface of the bar under pressure, the frictional resistance that the rod receives from the projections at that time is the friction that is received from the cylindrical inner peripheral surface of the conventional guide bush. Significantly reduced compared to resistance.
  • At least one support member buried in the inner peripheral surface of the bar supporting portion is further provided, and the projection is formed by a projecting portion of the support member projecting from the inner peripheral surface.
  • a configured rotating guide bush is provided. According to such a configuration, the projection can be formed relatively easily.
  • a rotary guide bush in which a support member has a substantially cylindrical shape, and a protruding portion is continuously formed on an inner peripheral surface along a rotation axis.
  • the projecting portion of the substantially columnar support member comes into contact with the outer peripheral surface of the bar, so that the bar can be guided along the rotation axis.
  • the protruding portion extends over substantially the entire length of the inner peripheral surface in the rotation axis direction. Thereby, the bar guide function of the protruding portion can be further improved.
  • a concave portion is provided on the inner peripheral surface of the rod supporting portion to partially accommodate the support member, and the concave portion has a substantially arcuate cross-sectional shape and extends along the rotation axis. And can be continuously extended.
  • a projecting portion that extends continuously along the rotation axis can be formed only by inserting the support member into the recess.
  • a rotary guide bush in which the support member has a substantially spherical shape and the protruding portion is formed locally on the inner peripheral surface along the rotation axis.
  • the protruding portions of the support member are arranged in the rotation axis direction, so that the bar can be guided along the rotation axis.
  • a concave portion is provided on the inner peripheral surface of the rod supporting portion to partially accommodate the supporting member, and the concave portion has a substantially circular cross-sectional shape and extends radially around the rotation axis. It can be.
  • the protrusion can be locally formed only by inserting the support member into the recess.
  • a protruding edge extending toward the center of the opening is formed in the opening of the concave portion on the inner peripheral surface, and the supporting member is held in the concave portion by the protruding edge.
  • the support member can be fixedly held in the radial direction only by inserting the support member into the concave portion.
  • a rotary guide bush in which a support member is formed of a roller rotatable about an axis extending in a direction substantially perpendicular to the rotation axis.
  • a support member is formed of a roller rotatable about an axis extending in a direction substantially perpendicular to the rotation axis.
  • the bar support is divided into a plurality of vertically divided portions by a plurality of slits extending in the direction of the rotation axis
  • at least one support member is installed in each of the vertically divided portions. You can also. Thereby, the inner diameter of the virtual cylindrical surface defined by the protruding portion of the support member can be optimally adjusted according to the outer diameter of the bar.
  • a rotary guide bush in which a projection is formed by a ridge extending in the rotation axis direction on the inner peripheral surface of the rod supporting portion.
  • the present invention further provides an automatic lathe in which the rotary guide bush having the above-described characteristics is installed near a bar working position.
  • This automatic lathe eliminates unnecessary gaps that can occur between the inner peripheral surface of the guide bushing bar support and the outer peripheral surface of the bar, thereby enabling high-precision machining of products.
  • wear and deterioration of the guide bush itself and the components of the chuck of the rotating spindle can be suppressed.
  • FIG. 1 shows a rotary guide bush according to a first embodiment of the present invention.
  • FIG. 2 is an end view of the guide bush of Fig. 1 as viewed from the arrow 11, and Figs. 3A to 3E are end faces corresponding to Fig. 2 showing the steps of the manufacturing process of the guide bush of Fig. 1 in order.
  • FIG. 4 is an end view corresponding to FIG. 2 showing a modification of the guide bush of FIG. 1,
  • Fig. 5 is a partial longitudinal sectional view of an automatic lathe incorporating the guide bush of Fig. 1, showing a state in which the bar to be turned is inserted into the guide bush.
  • FIG. 6 is a longitudinal sectional view of the rotary guide bush according to the second embodiment of the present invention, taken along line VI-VH in FIG.
  • Fig. 7 is an end view of the guide bush of Fig. 6 as viewed from arrow V11.
  • Fig. 8 is an enlarged cross-sectional view of the support member and the recess of the guide bush of Fig. 6.
  • Fig. 9 is a guide bush of Fig. 6. Exploded longitudinal sectional view showing one stage of the manufacturing process of
  • FIG. 10 is a longitudinal sectional view showing another stage of the manufacturing process of the guide bush of FIG.
  • FIG. 11 is an end view corresponding to FIG. 7 showing a modification of the guide bush of FIG. 6,
  • FIG. 12 is a longitudinal sectional view of the rotary guide bush according to the third embodiment of the present invention, taken along line XII—XII of FIG.
  • Fig. 13 is an end view of the guide bush of Fig. 12 viewed from arrow X11I.
  • Fig. 14 is a view of a modified example of the roller used in the guide bush of Fig. 12.
  • FIG. 15 is a fragmentary end view showing a modification of the guide bush of FIG. 13
  • FIG. 16 is a rotary guide bush according to a fourth embodiment of the present invention, which is taken along line XVI—FIG. Longitudinal section along XVI,
  • Fig. 17 is an end view of the rotary guide bushing of Fig. 16 viewed from arrow XVII.
  • Fig. 18 is an enlarged end view of the ridge in the rotary guide bush of Fig. 16, and
  • FIG. 19A and FIG. 19B are enlarged partial end views corresponding to FIG. 18 showing modified examples of the ridge.
  • FIGS. 1 and 2 show a rotary guide bush 10 (hereinafter, simply referred to as a guide bush 10) according to a first embodiment of the present invention, in a longitudinal sectional view and an end view, respectively.
  • Guide bush 10 is a hollow cylinder that is rotatably mounted on a lathe stand near the working position of the tool and supports the bar supported by the rotating spindle near the machined part at the tip. It is an auxiliary support device in the shape of
  • the guide bush 10 includes a rotation axis 10a and a stepped cylindrical inner surface 12 that receives and surrounds a bar W (round bar, see FIG. 5) processed by an automatic lathe.
  • a bar W round bar, see FIG. 5
  • a hollow cylindrical rod support 14 surrounding the rotation axis 10a is formed.
  • the bar support portion 14 has an inner peripheral surface 16 that forms a small diameter portion of the inner surface 12.
  • the rod support part 14 has three slits 18 penetrating the guide bush 10 in the radial direction through the cylindrical wall of the guide bush 10 at approximately equidistant intervals in the circumferential direction, with the rotation axis 10a as the center. And is formed radially. Each slit 18 extends from the axial front end face 20 of the guide bush 10 to substantially the center in the axial direction. As a result, three vertically divided portions 22 formed by dividing the cylindrical wall into three are formed in the bar supporting portion 14. Each vertically divided portion 22 has an inner peripheral surface portion 17 obtained by dividing the inner peripheral surface 16 of the bar support portion 14 into three parts.
  • the guide bush 10 is further formed as a projection locally formed on the inner peripheral surface 16 of the bar supporting portion 14, and is formed on the inner peripheral surface portion 17 of each vertically divided portion 22.
  • a total of three support members 26 are provided, one at a substantially central position in the circumferential direction.
  • Each support member 26 has a substantially cylindrical shape, and is fixedly embedded in each vertically divided portion 22 with a portion 28 protruding from the inner peripheral surface portion 17.
  • the support members 26 have substantially the same size and shape as each other, and support the bar W at a position separated from the inner peripheral surface 16 in cooperation with each other as described later.
  • a concave portion 30 having a substantially arcuate cross-sectional shape larger than a semicircle is formed in the inner peripheral surface portion 17 of each vertically divided portion 22 of the bar support portion 14.
  • These recesses 30 have substantially the same size and shape as each other, and extend continuously substantially parallel to the rotation axis 10a. Further, each recess 30 has a size and a shape capable of receiving each support member 26 without play.
  • Each of the three support members 26 has its central axis 26 a arranged substantially parallel to the rotation axis 10 a and is individually fixedly and partially accommodated in each of the recesses 30. .
  • the projecting portions 28 of the support members 26 projecting from the inner peripheral surface portion 17 have substantially the same size and shape as each other, and the rotation axis 10 a on the inner peripheral surface portion 17 is provided. Continuously in a direction substantially parallel to the axis and over substantially the entire length of the inner peripheral surface 16 in the rotation axis direction. More specifically, the vertex region of the projecting portion 28 of each support member 26 located at the radial inner end of the bar support portion 14 extends over substantially the entire axial length of the inner peripheral surface 16.
  • each vertically divided portion 22 of the bar support portion 14 is not elastically deformed.
  • each of the vertically divided portions 22 is uniformly elastically deformed to adjust the diameter of the inner peripheral surface 16 and the imaginary cylindrical surface 32, so that each of the supporting members 26 has its protruding portion 28.
  • the rod material W supplied to the rod support part 14 is uniformly adhered to the outer peripheral surface. Therefore, in the guide bush 10, the three support members 26 of the bar support portion 14 can reliably center and support the bar W that rotates together with the guide bush 10 so that no run-out occurs. it can.
  • the guide bush 10 having the above-described configuration, compared with the contact area between the cylindrical inner peripheral surface and the rod outer peripheral surface of the bar support portion in the conventional guide bush, three support members 26 are used.
  • the total contact area between the vertex area of the protruding portion 28 and the outer peripheral surface of the bar W is considerably reduced. Therefore, when the guide bush 10 is used in an automatic lathe having a configuration in which the rotating spindle moves in the axial direction while holding the bar, as described later, the bar W supported by the guide bush 10 is used.
  • a hollow cylindrical blank 36 having a cylindrical inner surface 34 centered on the rotation axis 10a is processed and manufactured (FIG. 3A).
  • a conical surface (not shown) that forms a tapered surface 24 (FIG. 1) upon completion is formed on the blank 36 on the outer peripheral surface opposite to the cylindrical inner surface 34.
  • Concave three independent cylindrical holes 40 (Fig. 3B). The central axes 40a of the cylindrical holes 40 are arranged at substantially equal intervals in the circumferential direction on a common virtual cylindrical surface centered on the rotation axis 10a.
  • each cylindrical hole 40 is opened on the side of the rotation axis 10a to form the inner peripheral surface 16 of the rod supporting portion 14 and three cylindrical holes are formed.
  • the recess 30 of FIG. In each of the recesses 30 formed in this way, three support members 26 produced in a separate process, for example, from a cemented carbide material, are individually inserted from the axial front end face 38 side. And fix it by brazing, for example (Fig. 3D). In this state, a part of each support member 26 protrudes from the inner peripheral surface 16 to form a protruding portion 28.
  • the guide bush 10 is formed by cutting three slits 18 in the blank 36 to form three vertically divided portions 22 of the bar support portion 14. It is completed (Fig. 3E).
  • the process of forming the peripheral surface 16 and the concave portion 30 Both can be performed by drilling, boring, and other processing operations that can achieve sufficient dimensional accuracy with relatively simple control.
  • the rod material can be removed.
  • a projecting portion 28 for supporting can be formed. Therefore, the guide bush 10 can be manufactured relatively inexpensively.
  • each support member 26 accommodated in each concave portion 30 is fixedly held in the concave portion 30 in the radial direction by the protruding edge 42.
  • each support member 26 is fixedly held in each of the concave portions 30 in the axial direction and the rotational direction by a fixing means such as brazing or an adhesive.
  • the tapered outer peripheral surface 46 is formed between the axial front end surface of the rod W and the supporting member 2 when the rod W is inserted into the rod supporting portion 14 from the axial rear end of the guide bush 10. 6 can be effectively prevented from colliding with the rear end face in the axial direction.
  • the apex region of the projecting portion 28 of each support member 26 of the guide bush 10 is formed into a concave surface corresponding to the outer peripheral surface shape of the bar W to be supported. Processed into shape and adheres to the outer peripheral surface of bar W Possible support surfaces 48 can also be formed on each support member 26.
  • the supporting surface 48 is an imaginary cylindrical surface centered on the rotation axis 10a of the guide bush 10 in a state where the vertically divided portions 22 of the bar support portion 14 are not elastically deformed. 50 are arranged at substantially equal intervals in the circumferential direction.
  • each vertically divided portion 22 is uniformly elastically deformed to adjust the diameter of the inner peripheral surface 16 and the virtual cylindrical surface 50, so that each support member 26 has its support surface 48.
  • the rod W uniformly supplied to the rod supporting portion 14 is brought into close contact with the outer peripheral surface of the rod W.
  • each support member 26 supports the bar W at the apex region of the protruding portion 28, compared with the configuration in which the bar 26 provided by the support It further improves the centering support function of W, and can be used particularly effectively when performing ultra-precision machining of the bar W with an automatic lathe.
  • each support surface 48 can be formed by, for example, polishing after fixing each support member 26 to the concave portion 30 in the method of manufacturing the guide bush 10 described with reference to FIG.
  • FIG. 5 is a sectional view showing a main part of an automatic lathe such as an NC lathe provided with the guide bush 10 incorporated therein.
  • the guide bush 10 is moved through the sleeve member 52, the bearing device 54, and the flange member 56 near the working position of the tool 58 set on the lathe machine base, and on the machine base. It is rotatably installed on the column 60 of the camera.
  • the guide bush 10 is accommodated in the front end (left end in the figure) region of the sleeve member 52 so as to be slidable in the axial direction and relatively non-rotatable.
  • a corresponding taper surface 62 that can contact the taper surface 24 provided on the outer peripheral surface of the bar support portion 14 of the guide bush 10 is formed.
  • an adjustment nut having a female screw part that matches the male screw part 64 (Fig. 1) provided at the rear end in the axial direction of the guide bush 10 is provided. 6 6 force ⁇ , housed rotatably fixed in the axial direction. So Thus, when the adjustment nut 66 rotates, the guide bush 10 moves in the sleeve member 52 in the axial direction.
  • a driven gear 70 is attached to the rear end region of the outer peripheral surface of the sleeve member 52 via a key 68.
  • the driven gear 70 is connected to a guide bush drive source (not shown) via a power transmission mechanism (not shown), and is rotated by the guide bush drive source at the same rotation speed as the rotating spindle 72 of the automatic lathe. Driven.
  • the driven gear 70, the adjusting nut 66, the sleeve member 52, and the guide bush 10 are strong, and the rotation speed of the rotating spindle 72 is the same as the rotation speed of the rotating shaft 72 integrally inside the flange member 56. It rotates at the rotation speed.
  • the flange member 56 is fixed to the column 60 by, for example, a bolt 74.
  • the guide bush 10, the sleeve member 52, the flange member 56, the adjusting nut 66, and the driven gear 70 are provided as a pre-assembled guide bushing device, which is an automatic lathe. Of the column 60 in place.
  • the rotating spindle 72 holds a bar W to be turned and is rotationally driven by a spindle driving source (not shown).
  • the rotating spindle 72 has a hollow cylindrical structure, and an openable chuck 76 that can hold the bar W is accommodated in a front end region thereof.
  • the chuck 76 is a so-called collet chuck having a slit portion at the tip. When an external force, that is, a pressing force is applied to the slit portion inwardly in the radial direction, the chuck 76 has a slit.
  • the bar holding hole 78 of this bar is reduced in diameter, the chuck 76 is closed, and the bar W is fixedly held.
  • a taper surface 80 for receiving an external force inward in the radial direction is provided on the outer periphery of the slit of the chuck 76.
  • the rotating spindle 72 further accommodates a hollow cylindrical operating member 82 movably in the axial direction.
  • Actuating member 82 is chucked in its front end area.
  • a corresponding tapered surface 84 that can accommodate the tapered surface 6 and that can contact the tapered surface 80 provided on the outer periphery of the chuck 76 is provided.
  • the corresponding taper surface 84 becomes the taper surface of the chuck 76.
  • the chuck 76 is closed by applying a pressing force inward in the radial direction to the slot of the chuck 76 via the tapered surface 80. In this state, when the operating member 82 is moved rearward in the axial direction (to the right in the figure), the corresponding taper surface 84 is detached from the tapered surface 80 of the chuck 76, and the chuck 7 is removed.
  • the configuration of the rotary spindle 72 is not limited to the above.
  • the opening / closing operation mechanism of the chuck 76 by moving the operating member connected to the rear end of the chuck in the axial direction rearward together with the chuck, it can be moved to the tapered surface of the chuck.
  • a configuration in which a pressing force is applied inward in the radial direction may be employed.
  • the nominal diameter equivalent to the outer diameter of the bar W to be turned that is, the virtual cylindrical surface 3 defined by the protruding portions 28 of the three support members 26
  • the guide bush 10 having a nominal diameter of 2, 50 is placed in the initial state where no external force is applied to the bar support portion 14 in the radial direction, and the bar W to be turned is removed. Insert into bar support 14.
  • the bar support portion The mutual contact surface between 14 and the bar W is constituted only by the protruding portion 28 of the three support members 26, and the frictional stress generated between the mutual contact surfaces when the bar is fed is significantly reduced. Therefore, not only can the gap between the projecting portion 28 of the three support members 26 and the outer peripheral surface of the bar be adjusted as much as possible, but also the projecting portion 28 On the other hand, the diameter can be reduced and adjusted until the state of the interference fits positively, and thus the projections 28 of the three support members 26 of the guide bush 10 are defined. After adjusting the diameter of the virtual cylindrical surface 32, 50, install the guide bushing device on the column 60 of the automatic lathe.
  • the bar W is held on the rotary spindle 72 while projecting from the chuck 76 by a predetermined processing length, and the bar W is guided by the axial movement of the rotary spindle ⁇ 2. Insert the rod support part 14 of the shoe 10 from the rear (right side in the figure). Next, while the guide bush 10 supports the vicinity of the processed portion of the bar W, do not perform turning with a tool 58, for example.
  • the frictional resistance received by the bar W from each protruding portion 28 during the feeding of the bar W to the tool 58 in the axial direction with the progress of turning is reduced by the conventional guide.
  • the frictional resistance received from the cylindrical inner peripheral surface of the bar support in the bush is significantly reduced.
  • each support member 2 adjusted to a tight fit state due to a variation or bending of the outer diameter in the longitudinal direction of the bar W. 6
  • Projection 2 8 Force Even if the rod W fed in the axial direction may bite into the outer peripheral surface, the frictional resistance that the rod W receives from each projection 28 at that time is extremely small. Become.
  • the sliding between the chuck 76 of the rotating spindle 72 and the bar W is performed. Is prevented, and the bar W can be fed accurately according to the set value, so that the bar feeding process is stable and errors and variations in the length dimension of the processed product are possible. To be reduced.
  • the guide bush 10 can avoid such a problem that the bar cannot be fed due to excessive frictional resistance and the turning cannot be continued.
  • the holding force of the chuck 76 of the rotating spindle 72 can be set in a normal range. Therefore, the wear and deterioration of each component of the guide bush 10 and the chuck 76 can be delayed to extend the life of the component, and the maintenance / replacement cycle of the component can be extended to extend the life of the component.
  • the cost of maintenance can be reduced.
  • the diameter of the virtual cylindrical surface 32, 50 defined by the protruding portions 28 of the three support members 26 of the bar support portion 14 can be reduced By adjusting the outer diameter of W to a tight fit, even if the rod W has a portion smaller in diameter than the imaginary cylindrical surface 32, 50, the small diameter portion As a result, the protruding portions 28 surely come into contact with each other, so that the bar W can be stably supported. Therefore, such adjustment of the interference fit has the effect of significantly improving the outer diameter accuracy (including dimensional values, dimensional tolerances, roundness, and cylindricity) of the processed product.
  • the guide bush 10 has the ability to adjust the above-mentioned interference fit, so that it is possible to reduce the interference between one or more drawn materials with uneven outer diameter and uneven bending. Variations are tolerable to a large extent.
  • the number of times the inner diameter adjustment was performed every time the degree of adhesion between the cylindrical inner peripheral surface of the bar Significant reduction and effective reduction of guide bus 10 internal diameter adjustment time can do.
  • FIGS. 6 and 7 show a rotary guide bus 90 (hereinafter simply referred to as guide bus 90) according to a second embodiment of the present invention in a longitudinal sectional view and an end view, respectively.
  • the guide bush 90 serves as a projection locally formed on the inner peripheral surface 16 of the rod supporting portion 14, and serves as a substantially spherical support member 9 partially embedded in the inner peripheral surface 16. 2 is provided. Since the guide bush 90 has substantially the same configuration as the guide bush 10 described above except for the configuration of the support member 92, the same or similar components are denoted by the same reference numerals. The detailed description is omitted.
  • the rod support portion 14 of the guide bush 90 is formed of three cylindrical sections, each of which is fixed to the inner surface 94 of each of the vertically divided portions 22 divided by three slits 18.
  • the mounting member 96 is provided.
  • the attachment members 96 have substantially the same shape and dimensions as each other, and are provided with concave surfaces 98 on the sides facing the rotation axis 90a. Therefore, in the guide bush 90, the inner peripheral surface 16 of the bar support portion 14 is constituted by the concave surfaces 98 of the three mounting members 96.
  • the bar support portion 14 is further separated from each other in the direction of the rotation axis by the inner circumferential surface 16 of each vertically divided portion 22, that is, at the substantially circumferential center position of the concave surface 98 of each mounting member 96.
  • the two support members 92 each having a substantially spherical shape are fixedly buried in a state in which a part 100 thereof protrudes from the concave surface 98.
  • a total of six support members 92 have substantially the same size and shape as one another, and cooperate with each other to support the bar W at a position separated from the inner peripheral surface 16 as described later.
  • each mounting member 96 On the concave surface 98 of each mounting member 96, two concave portions 102 having a substantially circular cross-sectional shape are provided. A total of six concave portions 102 have substantially the same size and shape as each other, and extend radially around the rotation axis 90a. Each recess 102 receives each support member 92 without play. It has acceptable size and shape. Further, as shown in an enlarged view in FIG. 8, an annular protruding edge 104 extending toward the center of the opening is formed at the opening of each recess 102 on the concave surface 98. .
  • each of the six support members 92 is individually and partially accommodated in each of the recesses 102. At this time, each support member 92 is fixedly held in each recess 102 by the protruding edge 104 and the inner surface 94 of the bar support portion 14. As a result, the projecting portions 100 of the supporting members 92 projecting from the inner peripheral surface 16 of the bar supporting portion 14, that is, the concave surface 98 of each mounting member 96, have substantially the same size and shape as each other. And are formed locally on the concave surface 98 spaced apart from each other in the direction of the axis of rotation.
  • the apex region located at the radially inner end of the bar support portion 14 of the projecting portions 100 of the six support members 92 is a vertical section of each of the bar support portions 14.
  • the split part 22 is not elastically deformed, it is distributed on the virtual cylindrical surface 106 around the rotation axis 90 a of the guide bush 90 at substantially equal intervals in the circumferential direction. In addition, they are spaced and aligned in the direction of the rotation axis.
  • each vertically divided portion 22 is uniformly elastically deformed to adjust the diameter of the inner peripheral surface 16 and the imaginary cylindrical surface 106, so that each support member 9 2 has its protruding portion 10 At the vertex region of 0, the rod W is uniformly brought into close contact with the outer peripheral surface of the rod W (FIG. 5) supplied to the rod supporting portion 14. Therefore, in the guide bush 90, the bar W rotating together with the guide bush 90 is surely centered and supported by the six support members 92 of the bar support portion 14 so as not to run out. be able to.
  • the guide bush 90 having the above-described configuration also has the same operation and effect as the guide bush 10 shown in FIGS. Further, the guide bush 90 can be used by being incorporated in an automatic lathe shown in FIG. 5, thereby exhibiting the various remarkable effects described above. Particularly, in the guide bush 90, a substantially spherical support member 92 is used instead of the substantially cylindrical support member 26, and the protruding portion 100 is locally formed along the rotation axis 90a. As a result, the total contact area between the apex region of each protrusion 100 and the outer peripheral surface of the bar W is further reduced.
  • substantially spherical support member 92 may be arranged at only one position in the direction of the rotation axis at the desired center angle position of the concave surface 98 in each vertically divided portion 22 of the bar support portion 14. Good. Further, three or more support members 92 can be arranged at the desired center angle position of the concave surface 98 in the direction of the rotation axis.
  • a method of manufacturing the guide bush 90 will be described with reference to FIGS.
  • a hollow cylindrical blank 110 having an inner surface 12 centered on a rotation axis 90a and a cylindrical inner surface 108 is processed and manufactured.
  • a conical surface 112 constituting a tapered surface 24 (FIG. 6) upon completion is formed on the outer peripheral surface opposite to the cylindrical inner surface 108.
  • a hollow cylindrical mounting member blank 1-4 having an inner peripheral surface 16 is processed and manufactured in a separate process.
  • the mounting member blank 114 includes six independent recesses 102 having an inner diameter corresponding to the outer diameter of the support member 92 radially about the rotation axis 90a. Keep it.
  • each of the concave portions 102 of the mounting member blanks 114 is provided with six support members 92 produced in a separate process, for example, from a cemented carbide material.
  • Each is inserted individually from the outer peripheral side, and in that state, the mounting member blanks 114 are inserted from the front end in the axial direction along the cylindrical inner surface 108 of the blanks 110, for example, by brazing or It is fixed to the inner surface 108 of the cylinder by a fixing means such as an adhesive (FIG. 10).
  • a portion of each support member 92 protrudes from the inner peripheral surface 16 to form a protruding portion 100.
  • the step of forming the cylindrical inner surface 108 in the blank 110, and the inner peripheral surface 16 and the concave portion 102 in the mounting member blank 114 are provided.
  • the forming process can be performed by drilling, boring, and other processing operations that can achieve sufficient dimensional accuracy with relatively simple control.
  • the support member 92 is inserted into the recess 102, By simply inserting the mounting member blank 114 along the cylindrical inner surface 108 of the blank 110, the projecting portion 100 for supporting the bar can be formed. Therefore, the guide bush 90 can be manufactured relatively inexpensively.
  • each support member 92 corresponds to the outer peripheral surface shape of the bar W to be supported. It is also possible to form a support surface 1 16 on each support member 9 2 that can be in close contact with the outer peripheral surface of the bar W by processing it into a concave shape.
  • These support surfaces 1 16 are imaginary cylindrical surfaces 1 1 centered on the rotation axis 90 a of the guide bush 90 in a state where the vertically divided portions 22 of the bar support portion 14 are not elastically deformed. 8 Distribute at substantially equal intervals in the circumferential direction Is placed.
  • each vertically divided portion 22 is uniformly elastically deformed to adjust the diameter of the inner peripheral surface 16 and the imaginary cylindrical surface 118, so that each support member 9 2 has its supporting surface 11
  • the rod W uniformly supplied to the rod supporting portion 14 is brought into close contact with the outer peripheral surface.
  • each support member 92 supports the bar W at the vertex region of the protruding portion 100, and the rod formed by the support member 92 provided in the bar support portion 14. It further improves the centering support function of the bar W and can be used particularly effectively when ultra-precision machining of the bar W is performed with an automatic lathe.
  • each of the support surfaces 1 16 corresponds to the mounting member blank 1 in which each support member 92 is accommodated in the concave portion 102. After brazing 14 to the cylindrical inner surface 108 of the blank 36, it can be formed, for example, by polishing.
  • FIGS. 12 and 13 show a rotary guide bush 120 (hereinafter simply referred to as a guide bush 120) according to a third embodiment of the present invention in a longitudinal sectional view and an end view, respectively.
  • the guide bush 120 serves as a projection locally formed on the inner peripheral surface 16 of the bar supporting portion 14, and is a support member 1 composed of a roller partially embedded in the inner peripheral surface 16. 2 2 is provided. Since the guide bush 120 has substantially the same configuration as the guide bus 10 except for the configuration of the support member 122, the same or similar components are denoted by the same reference numerals. The detailed description is omitted.
  • the rod support portion 14 of the guide bush 120 has an inner circumferential surface portion 17 of each of the vertically divided portions 22 divided by three slits 18 at a position substantially at the center in the circumferential direction of the inner circumferential surface portion 17.
  • the substantially disk-shaped support member 1 2 2 is buried in a state in which the portion 1 2 4 protrudes from the inner peripheral surface portion 17.
  • the support members 122 have openings having substantially the same size and shape as each other.
  • the rod W is formed as a roller and cooperates with each other as described later to support the bar W at a position separated from the inner peripheral surface 16. As shown in FIG. 14, each support member 122 may have a disk shape with rounded corners.
  • Each vertically divided portion 2 2 of the bar support portion 14 has a concave portion 1 26 that penetrates between the inner peripheral surface portion 17 and the tapered surface 24, and the rotation axis 1 20 a is centered. And is formed radially.
  • Each of the recesses 1 26 opens into the axial front end face 20 of the guide bush 120.
  • the recesses 126 have substantially the same size and shape as each other, and have a size and shape capable of rotatably receiving the support members 122 without looseness.
  • Each vertically divided portion 22 further includes a pair of through holes 1 2 extending in a direction substantially perpendicular to the rotation axis 120 a and the radial line 14 a of the bar support portion 14 (FIG. 13). 8 are formed so as to be coaxially aligned with each other around the concave portion 126.
  • a support shaft 130 for rotatably supporting the support member 122 is fixedly received in each pair of through holes 128.
  • Each support member 122 is individually and partially accommodated in each concave portion 126, and extends in a direction substantially orthogonal to the rotation axis 120a and the radius line 14a by each support shaft 130. It is supported rotatably about the axis 1 2 2a. As a result, the projecting portions 124 of the three support members 122 always have substantially the same size and shape as each other without changing during rotation, and project from the inner peripheral surface portion 17. .
  • the support member 122 and the support shaft 130 are preferably formed of a cemented carbide material.
  • each support member 122 located at the radially inner end of the bar support portion 144 is a vertically divided portion of the bar support portion 144.
  • they are arranged at substantially equal intervals in the circumferential direction on a virtual cylindrical surface 132 around the rotation axis 120 a of the guide bush 120.
  • each vertically divided portion 22 is uniformly elastically deformed to measure the diameter of the inner peripheral surface 16 and the virtual cylindrical surface 1 32.
  • each support member 1 2 2 uniformly adheres to the outer peripheral surface of the bar W (Fig. 5) supplied to the bar support portion 14 at the apex area of the protruding portion 124. I do. Therefore, in the guide bush 120, the three support members 122 of the bar support portion 14 securely center and support the bar W rotating together with the guide bush 120 so as not to cause deflection. can do.
  • the guide bush 120 having the above configuration also has the same operation and effect as the guide bush 10 shown in FIGS. 1 to 4 and the guide bush 90 shown in FIGS. 6 to 11. It will be understood. Further, the guide bush 120 can be used by being incorporated into an automatic lathe shown in FIG. 5, thereby exhibiting the various remarkable effects described above.
  • the guide bush 120 uses a support member 122 formed of a substantially disk-shaped roller rotatable about the axis 122 a, the bar supported by the guide bush 120 is used. While sending W in the axial direction along the bar support portion 14, each support member 1 2 2 varies due to the variation in the outer diameter dimension in the longitudinal direction inherently possessed by the bar W. Even if the protruding portion 1 2 4 may be pressed against the outer peripheral surface of the bar, the respective support members 1 2 2 rotate with the feed of the bar W, so that each protruding portion 1 2 4 The frictional resistance between 4 and the bar W can be substantially eliminated. Such an effect of the guide bush 120 is particularly effective when the rod W is made of a relatively soft material such as zirconium.
  • each of the support members 26, 92 can relatively easily cut the outer peripheral surface of the bar and bite into the bar W, thereby rapidly increasing frictional resistance and making it difficult to feed the bar W stably. Tends to be.
  • each support member 122 is rotated. By moving, such a cut can be reliably avoided, so that even a rod W made of a soft material can be fed accurately and stably. In addition, it is possible to prevent shavings of the bar W from accumulating in the guide bush.
  • the pressing trace of each of the support members 122 may be formed in a groove shape on the outer peripheral surface of the bar W of the soft material. Therefore, as shown in Fig. 15, if a support member 122 composed of a relatively wide roller is used in relation to the outer diameter of the bar W, such a groove-shaped pressing trace can be obtained. Can be eliminated.
  • FIGS. 16 and 17 show a rotary guide bush 140 (hereinafter simply referred to as a guide bush 140) according to a fourth embodiment of the present invention in a longitudinal sectional view and an end view, respectively.
  • the guide bush 140 is provided with a ridge 144 extending along the rotation axis 140 a as a projection locally formed on the inner peripheral surface 16 of the bar support portion 14.
  • the guide bush 140 is substantially the same as the guide bush 10 described above, except that the projections 142 are provided in place of the support members 26 partially embedded in the inner peripheral surface 16. Since they have the same configuration, the same or similar components are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the rod support portion 14 of the guide bush 140 has a substantially central portion in the circumferential direction of the inner peripheral surface portion 17 of each vertically divided portion 22 formed by the three slits 18.
  • An axially extending ridge 14 2 is provided at each position from the inner peripheral surface portion 17 to project radially inward.
  • the ridges 142 have substantially the same size and shape as each other, and cooperate with each other to support the bar W at a position separated from the inner peripheral surface 16 as described later.
  • the three ridges 14 2 extend continuously substantially parallel to the rotation axis 140 a of the guide bush 140 and over substantially the entire length of the inner peripheral surface 16 in the rotation axis direction. Formed.
  • a support surface that supports the bar W by contacting the outer peripheral surface of the bar W (FIG. 5) supplied to the bar support portion 14 is provided at the leading end in the protruding direction, that is, the radial inner end of each of the ridges 14 2. 1 4 4 is formed.
  • the support surface 144 of each of the ridges 142 has a concave shape corresponding to the outer peripheral surface shape of the bar W to be supported.
  • the support surfaces 144 of the three ridges 142 are provided with guide bushes in a state where the vertically divided portions 22 of the bar supporting portions 14 are not elastically deformed. They are arranged on the imaginary cylindrical surface 144 centered on the rotation axis line 140a of 140 at approximately equal intervals in the circumferential direction. In this state, each vertically divided portion 22 is uniformly elastically deformed to adjust the diameter of the inner peripheral surface 16 and the imaginary cylindrical surface 146. 4 At 4 adhere uniformly to the outer peripheral surface of the bar W. Therefore, in the guide bush 140, the bar W rotating together with the guide bush 140 is surely prevented from swaying due to the three ridges 142 of the bar support portion 14. It can be put out and supported.
  • the guide bush 140 having the above-described configuration also provides the same operation and effects as those of the guide buses 100, 90, and 120 described above. Further, the guide bush 140 can be used by being incorporated in an automatic lathe shown in FIG. 5, thereby exhibiting the various remarkable effects described above.
  • the guide bush 140 has an inner circumferential surface 16 and a ridge 1 on a hollow cylindrical blank having a cylindrical inner surface 1 48 at the front end in the axial direction centered on the rotation axis 140 a.
  • the three slits 18 are cut and processed to form the three rod support portions 14. It can be manufactured by forming the vertically divided part 22.
  • the component 150 is preferably formed from a cemented carbide material.
  • the ridges 142 of the guide bush 140 can be constituted by prismatic support members 15 2 similarly to the guide bush 10 of FIG. .
  • a rectangular groove 154 extending in the axial direction is engraved in the inner peripheral surface portion 17 of each vertically divided portion 22 of the bar support portion 14, and the cemented carbide material is formed in the rectangular groove 154.
  • a prism-shaped support member 152 formed in a separate process from a firing person a ridge 142 having a support surface 144 is formed. Support surface 1
  • the surface including the support surface 144 of the ridges 142 formed by the support member 152 is coated with a DLC (diamond-like force) coating 1. It can be covered with 56.
  • DLC diamond-like force
  • Reference numeral 56 denotes an amorphous carbon hard film mainly composed of carbon and hydrogen, which has a crystal structure and characteristics very close to those of diamond. According to such a configuration, the frictional resistance between the support surface 144 of each of the ridges 144 and the outer peripheral surface of the bar at the time of feeding the bar can be more effectively reduced.
  • the protrusions formed on the inner peripheral surface of the rod supporting portion are, as in each of the above embodiments, at least equally spaced in the circumferential direction of the inner peripheral surface in order to accurately center and support the rod. It is advantageous to install them in three places.
  • the shape of the inner peripheral surface itself of the rod supporting portion is made asymmetrical, the rod can be accurately centered and supported by a configuration in which the supporting member is arranged at least at one position in the circumferential direction of the inner peripheral surface. be able to.
  • Protrusions shall be provided at four or more circumferentially spaced locations on the inner peripheral surface of the rod support.
  • An object of the present invention is to provide a rotary guide bush which is mounted on an automatic lathe and enables a product to be formed with high precision.
  • ADVANTAGE OF THE INVENTION The rotary guide bush by this invention reduces the frictional resistance which arises between the bar support part of a guide bush, and a bar outer peripheral surface at the time of bar feed, and also reduces the rod support part and the bar outer peripheral surface. Unnecessary gaps that may be generated between them can be eliminated.
  • it is possible not only to suppress the wear and deterioration of the guide bush and the components of the chuck, but also to shorten the time for adjusting the inner diameter of the guide bush. Therefore, it can be preferably applied particularly when a drawn material having a low outer diameter dimensional accuracy is used as a bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Building Awnings And Sunshades (AREA)

Abstract

La présente invention concerne une douille rotative (10) comprenant une partie (14) supportant le matériau en barre cylindrique creuse entourant un axe (10a) rotatif, dans lequel des éléments supports (26) de forme généralement cylindrique sont enterrés de façon fixe dans la surface (16) périphérique interne de la partie (14) supportant le matériau en barre un chacun à chacune des trois parties (22) fendues verticalement, avec une partie (28) de chacun de ces éléments supports (26) dépassant extérieurement depuis la surface (16) périphérique interne, une partie (30) évidée ayant une forme en coupe de forme généralement en segment plus grande en superficie qu'un demi-cercle est installée en évidement dans la surface (16) périphérique interne de chaque partie (22) fendue verticalement chaque élément (26) supportant est rangé dans chaque partie évidée (30) avec son axe (26a) central disposé généralement en parallèle avec l'axe rotatif (10a), et des parties (28) dépassant extérieurement de ces éléments supports (26) sont adaptés serré uniformément sur la surface périphérique externe d'un matériau en barre fourni à la partie (14) supportant le matériau en barre dans ces zones du dessus, ce par quoi le matériau en barre tournant en même temps que la douille (10) est centré de façon supportée de sorte qu'une excentricité ne se produise pas sur le matériau en barre.
PCT/JP1999/003085 1999-04-01 1999-06-09 Douille rotative WO2000059660A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000609208A JP4330277B2 (ja) 1999-04-01 1999-06-09 回転型ガイドブッシュ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9491799 1999-04-01
JP11/94917 1999-04-01

Publications (1)

Publication Number Publication Date
WO2000059660A1 true WO2000059660A1 (fr) 2000-10-12

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PCT/JP1999/003085 WO2000059660A1 (fr) 1999-04-01 1999-06-09 Douille rotative

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JP (1) JP4330277B2 (fr)
TW (1) TW431920B (fr)
WO (1) WO2000059660A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331053A1 (fr) * 2002-01-28 2003-07-30 René Crevoisier Organe de guidage pour tour automatique
WO2008111226A1 (fr) * 2007-03-15 2008-09-18 Daishowa Seiki Co., Ltd. Porte-outil à ajustement fretté
JP2009000786A (ja) * 2007-06-22 2009-01-08 Otani Tekkosho:Kk チャック用コレットの割溝構造
WO2014125951A1 (fr) * 2013-02-14 2014-08-21 大同特殊鋼株式会社 Pince de serrage
US20210220924A1 (en) * 2020-01-16 2021-07-22 Schaublin Sa Flexible collet assembly with limited radial stiffness
US11465216B1 (en) * 2021-04-26 2022-10-11 Techniks, LLC Tool holder with stress fit rods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101862602B1 (ko) * 2011-01-19 2018-05-31 두산공작기계 주식회사 터릿 장착 타입의 가이드 부시 유닛

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173402U (ja) * 1982-05-13 1983-11-19 セイコ−精機株式会社 自動「隙」間調整式ガイドブツシユ
JPS62106704U (fr) * 1985-12-25 1987-07-08

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173402U (ja) * 1982-05-13 1983-11-19 セイコ−精機株式会社 自動「隙」間調整式ガイドブツシユ
JPS62106704U (fr) * 1985-12-25 1987-07-08

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331053A1 (fr) * 2002-01-28 2003-07-30 René Crevoisier Organe de guidage pour tour automatique
WO2008111226A1 (fr) * 2007-03-15 2008-09-18 Daishowa Seiki Co., Ltd. Porte-outil à ajustement fretté
JP2009000786A (ja) * 2007-06-22 2009-01-08 Otani Tekkosho:Kk チャック用コレットの割溝構造
WO2014125951A1 (fr) * 2013-02-14 2014-08-21 大同特殊鋼株式会社 Pince de serrage
JP2014155966A (ja) * 2013-02-14 2014-08-28 Institute Of National Colleges Of Technology Japan コレット
CN105008075A (zh) * 2013-02-14 2015-10-28 大同特殊钢株式会社 夹头
US20210220924A1 (en) * 2020-01-16 2021-07-22 Schaublin Sa Flexible collet assembly with limited radial stiffness
US11465216B1 (en) * 2021-04-26 2022-10-11 Techniks, LLC Tool holder with stress fit rods
US11691230B1 (en) 2021-04-26 2023-07-04 Techniks, LLC Tool holder with stress fit rods

Also Published As

Publication number Publication date
JP4330277B2 (ja) 2009-09-16
TW431920B (en) 2001-05-01

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