US20080171605A1 - Master Spindle for Tapping Machine - Google Patents
Master Spindle for Tapping Machine Download PDFInfo
- Publication number
- US20080171605A1 US20080171605A1 US10/596,037 US59603705A US2008171605A1 US 20080171605 A1 US20080171605 A1 US 20080171605A1 US 59603705 A US59603705 A US 59603705A US 2008171605 A1 US2008171605 A1 US 2008171605A1
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- US
- United States
- Prior art keywords
- support member
- chuck
- chuck support
- spindle
- bushing nut
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
- B23G1/18—Machines with one working spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2240/00—Details of equipment for threading other than threading tools, details of the threading process
- B23G2240/08—Evacuation of chips or fines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2240/00—Details of equipment for threading other than threading tools, details of the threading process
- B23G2240/12—Means for cooling or lubrication
Definitions
- the present invention relates, in general, to a master spindle for a tapping machine which can tap a female thread in a workpiece at high speed and with high precision, and, more particularly, to a master spindle for a tapping machine in which a single chuck support member is used, an umbrella-shaped chip cover or a fluctuation correcting cap is selectively fitted around the chuck support member, the chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck, and tapped holes are defined in a bushing nut threadedly coupled to a spindle bolt.
- a tap 3 is detachably mounted to a chuck 5 which is mounted to an upper chuck support member 7 .
- the upper chuck support member 7 is detachably locked to a lower support member 9 which is mounted to a spindle bolt 11 .
- a bushing nut 13 is locked to the spindle bolt 11 and is positioned below the lower support member 9 . Therefore, the spindle bolt 11 can be raised and lowered while being rotated relative to the bushing nut 13 fastened to a jig 15 .
- the lower end of the spindle bolt 11 is connected to a universal joint (or a cable) (not shown) to receive power.
- chip particles 17 are likely to be introduced into the chuck 5 , whereby the tap 3 may not be easily separated from the chuck 5 due to the presence of the chip particles 17 . Also, while conducting tapping work in the vertical direction, the chip particles 17 are likely to enter a gap between the bushing nut 3 and the spindle bolt 11 , whereby the screw threads of the spindle bolt 11 and the bushing nut 13 can be crushed.
- an object of the present invention is to provide a master spindle for a tapping machine in which a single chuck support member for supporting a chuck is used to decrease the length of a chuck support structure and solve the drawbacks resulting from non-concentricity of the chuck support structure.
- Another object of the present invention is to provide a master spindle for a tapping machine in which an umbrella-shaped chip cover is fitted around the lower end of a chuck support member to prevent chip particles from entering a gap between a bushing nut and a spindle bolt and avoid breakage of screw threads of the bushing nut and the spindle bolt.
- a further object of the present invention is to provide a master spindle for a tapping machine in which a fluctuation correcting cap fitted around a chuck support member is coupled to a bushing nut by bolts so that, when a spindle bolt threadedly coupled to the bushing nut is rotated relative to the bushing nut, the chuck support member connected integrally to the spindle bolt can be raised and lowered, without fluctuating, on the circumferential inner surface of the fluctuation correcting cap, and so that the fluctuation correcting cap can prevent chip particles from entering a gap between the bushing nut and the spindle bolt.
- Yet another object of the present invention is to provide a master spindle for a tapping machine in which a chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck so that, even when chip particles are introduced into the chuck while tapping is implemented in a vertical direction, since it is possible to push the lower end of the tap out of the chuck by a lever inserted through the tap separation hole, the tap can be reliably separated from the chuck as the occasion demands.
- Still another object of the present invention is to provide a master spindle for a tapping machine in which auxiliary mounting holes are defined in a flange portion of a bushing nut so that the bushing nut can be mounted to a jig irrespective of the position of the jig.
- the master spindle for a tapping machine provides advantages in that, since a chuck support member has integral upper and lower ends, drawbacks due to non-concentricity of a chuck support structure in the conventional master spindle can be eliminated, and the length of the entire chuck support structure can be decreased, whereby the fluctuation of the master spindle during tapping is lessened and the precision of tapping work is improved.
- the master spindle for a tapping machine due to the presence of an umbrella-shaped chip cover, it is possible to prevent chip particles from entering the gap between a bushing nut and a spindle bolt and avoid the breakage of screw threads of the bushing nut and the spindle bolt.
- the chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck, even when chip particles are introduced into the chuck while tapping work is implemented in a vertical direction, it is possible to push the lower end of the tap out of the chuck by a lever inserted through the tap separation hole, whereby the tap can be reliably separated from the chuck as the occasion demands.
- the bushing nut can be mounted to a jig irrespective of the position of the jig.
- the tapping work can be reliably implemented. Also, it is possible to extend the service lives of the bushing nut and the spindle bolt and prevent chip particles generated during tapping from entering the gap between the bushing nut and the spindle bolt.
- FIG. 1 is a half sectional view illustrating a conventional master spindle for a tapping machine
- FIG. 2 is a half sectional view illustrating the master spindle of FIG. 1 in a state in which tapping is implemented in a vertical direction;
- FIG. 3 is a perspective view independently illustrating the bushing nut shown in FIGS. 1 and 2 ;
- FIG. 4 is a half sectional view illustrating a master spindle for a tapping machine in accordance with an embodiment of the present invention
- FIG. 5 is a half sectional view illustrating the master spindle of FIG. 4 in a state in which tapping is implemented in a vertical direction;
- FIG. 6 is a half sectional view illustrating the master spindle according to the present invention, with a fluctuation correcting cap fitted around a chuck support member;
- FIG. 7 is a half sectional view independently illustrating the fluctuation correcting cap
- FIG. 8 is a perspective view illustrating a bushing nut
- FIG. 9 is a half sectional view illustrating the master spindle with the bushing nut mounted to a jig placed on a flange portion of the bushing nut.
- a master spindle 50 for a tapping machine in accordance with an embodiment of the present invention comprises a chuck 53 having a tap 51 detachably mounted thereto; a chuck support member 55 having the chuck 53 mounted thereto; a spindle bolt 57 fastened to the chuck support member 55 at an upper end thereof; and a bushing nut 59 threadedly coupled to the spindle bolt 57 and positioned below the chuck support member 55 .
- the chuck support member 55 has an upper end to which the chuck 53 is mounted and a lower end to which the spindle bolt 57 is fastened.
- the upper and lower ends of the chuck support member 55 are integrally formed with each other.
- the drawbacks provoked due to non-concentricity of a chuck support structure in the conventional master spindle can be overcome, and the length ‘S’ of the entire chuck support structure can be decreased, whereby the fluctuation of the master spindle 50 during tapping is lessened and the precision of tapping work is improved.
- an umbrella-shaped chip cover 61 is provided to the lower end of the chuck support member 55 .
- the chip cover 61 prevents chip particles 100 which are generated from a workpiece (not shown), from entering the space between the spindle bolt 57 and the bushing nut 59 , even when tapping work is implemented in a vertical direction, so that it is possible to prevent the screw threads of the spindle bolt 57 and the bushing nut 59 from being crushed.
- the chuck support member 55 is provided with a fluctuation correcting cap 70 .
- the fluctuation correcting cap 70 is defined with an opening 77 into which the chuck support member 55 is fitted so that a circumferential outer surface of the chuck support member 55 is brought into tight contact with a circumferential inner surface 79 of the fluctuation correcting cap 70 .
- the fluctuation correcting cap 70 has a flange portion 75 which is coupled to the bushing nut 59 by locking bolts 81 .
- the chuck support member 55 which is integrally coupled to the spindle bolt 57 is brought into tight contact with the circumferential inner surface 79 of the fluctuation correcting cap 70 and can be raised and lowered without fluctuating relative to the fluctuation correcting cap 70 fastened to the bushing nut 59 .
- the fluctuation correcting cap 70 functions to prevent the chip particles 100 from entering the space between the spindle bolt 57 and the bushing nut 59 .
- the fluctuation correcting cap 70 has a cylindrical configuration similar to the chuck support member 55 .
- An O-ring 71 is fitted in the circumferential inner surface 79 of the fluctuation correcting cap 70 adjacent to the upper end of the fluctuation correcting cap 70 .
- An oil inlet hole 73 is defined through the fluctuation correcting cap 70 and communicates with the opening 77 .
- the O-ring 71 serves to occupy a gap between the chuck support member 55 and the fluctuation correcting cap 70 , so that, when the chuck support member 55 is raised and lowered relative to the fluctuation correcting cap 70 , the fluctuation of the chuck support member 55 can be further lessened.
- the oil which flows into the fluctuation correcting cap 70 through the oil inlet hole 75 reduces friction when the chuck support member 55 is rotated relative to the fluctuation correcting cap 70 .
- the chuck support member 55 is defined below the chuck 53 , with a tap separation hole 63 for easy separation of the tap 51 from the chuck 53 .
- a tap separation hole 63 for easy separation of the tap 51 from the chuck 53 .
- the bushing nut 59 is defined with mounting holes 59 b and auxiliary mounting holes 59 c . Therefore, as can be readily seen from FIG. 5 , in the case in which the jig 91 is located under a flange portion 59 a of the bushing nut 59 , bolts 83 can pass through the mounting holes 59 b and be locked into auxiliary mounting holes 93 b of the jig 91 to fasten the bushing nut 59 to the jig 91 . At this time, as shown in FIG. 6 , as the locking bolts 81 are locked into the mounting holes 95 b , the fluctuation correcting cap 70 is fastened to the bushing nut 59 .
- the bushing nut 59 can be fastened to the jig 91 .
- the locking bolts 81 are locked into the auxiliary mounting holes 59 c
- the fluctuation correcting cap 70 is fastened to the bushing nut 59 .
- the mounting holes 59 b and the auxiliary mounting holes 59 c of the bushing nut 59 allow the bushing nut 59 to be fastened to the jig 91 irrespective of the location of the jig 91 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Turning (AREA)
Abstract
Disclosed is a master spindle for tapping machine. The master spindle comprises a chuck (53) having a tap (51) detachably mounted thereto; a chuck support member (55) having the chuck (53) mounted thereto; a spindle bolt (57) fastened to the chuck support member (55) at an upper end thereof; and a bushing nut (59) threadedly coupled to the spindle bolt (57) and positioned below the chuck support member (55). The chuck support member (55) has an upper end to which the chuck (53) is mounted and a lower end to which the spindle bolt (57) is fastened, the upper and lower ends being integrally formed with each other.
Description
- The present invention relates, in general, to a master spindle for a tapping machine which can tap a female thread in a workpiece at high speed and with high precision, and, more particularly, to a master spindle for a tapping machine in which a single chuck support member is used, an umbrella-shaped chip cover or a fluctuation correcting cap is selectively fitted around the chuck support member, the chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck, and tapped holes are defined in a bushing nut threadedly coupled to a spindle bolt.
- Referring to
FIG. 1 , in aconventional master spindle 1 for a tapping machine, atap 3 is detachably mounted to achuck 5 which is mounted to an upperchuck support member 7. The upperchuck support member 7 is detachably locked to alower support member 9 which is mounted to aspindle bolt 11. Abushing nut 13 is locked to thespindle bolt 11 and is positioned below thelower support member 9. Therefore, thespindle bolt 11 can be raised and lowered while being rotated relative to thebushing nut 13 fastened to ajig 15. The lower end of thespindle bolt 11 is connected to a universal joint (or a cable) (not shown) to receive power. - However, in the
conventional master spindle 1 for a tapping machine, since the upperchuck support member 7 and thelower support member 9 are bolted to each other so that only thelower support member 9 and thespindle bolt 11 need be replaced with new ones when thespindle bolt 11 is broken, problems always occur due to non-concentricity between the upperchuck support member 7 and thelower support member 9. Also, due to the fact that the upper chuck supportmember 7 and thelower support member 9 are bolted to each other, the length ‘h’ of an entire support structure including the upperchuck support member 7 and thelower support member 9 increases. In this regard, while a defect is caused in that thetap 3 fluctuates when tapping a workpiece, means for preventing the fluctuation of thetap 3 has not been disclosed so far in the art. - Further, in the
conventional master spindle 1 for a tapping machine, as can be readily seen fromFIG. 2 , when tapping is conducted in a vertical direction,chip particles 17 are likely to be introduced into thechuck 5, whereby thetap 3 may not be easily separated from thechuck 5 due to the presence of thechip particles 17. Also, while conducting tapping work in the vertical direction, thechip particles 17 are likely to enter a gap between thebushing nut 3 and thespindle bolt 11, whereby the screw threads of thespindle bolt 11 and thebushing nut 13 can be crushed. - In addition, in the
conventional master spindle 1 for a tapping machine, as can be readily seen fromFIG. 3 , due to the fact that aflange portion 13 a of thebushing nut 13 is defined with only twomounting holes 13 b, thejig 15 must be located under theflange portion 13 a of thebushing nut 13 as shown inFIG. 2 . Therefore, in case that thejig 15 must be located over theflange portion 13 a of thebushing nut 13, since thebushing nut 13 cannot be fastened to thejig 15, it is impossible to implement the tapping work. - Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a master spindle for a tapping machine in which a single chuck support member for supporting a chuck is used to decrease the length of a chuck support structure and solve the drawbacks resulting from non-concentricity of the chuck support structure.
- Another object of the present invention is to provide a master spindle for a tapping machine in which an umbrella-shaped chip cover is fitted around the lower end of a chuck support member to prevent chip particles from entering a gap between a bushing nut and a spindle bolt and avoid breakage of screw threads of the bushing nut and the spindle bolt.
- A further object of the present invention is to provide a master spindle for a tapping machine in which a fluctuation correcting cap fitted around a chuck support member is coupled to a bushing nut by bolts so that, when a spindle bolt threadedly coupled to the bushing nut is rotated relative to the bushing nut, the chuck support member connected integrally to the spindle bolt can be raised and lowered, without fluctuating, on the circumferential inner surface of the fluctuation correcting cap, and so that the fluctuation correcting cap can prevent chip particles from entering a gap between the bushing nut and the spindle bolt.
- Yet another object of the present invention is to provide a master spindle for a tapping machine in which a chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck so that, even when chip particles are introduced into the chuck while tapping is implemented in a vertical direction, since it is possible to push the lower end of the tap out of the chuck by a lever inserted through the tap separation hole, the tap can be reliably separated from the chuck as the occasion demands.
- Still another object of the present invention is to provide a master spindle for a tapping machine in which auxiliary mounting holes are defined in a flange portion of a bushing nut so that the bushing nut can be mounted to a jig irrespective of the position of the jig.
- As apparent from the above description, the master spindle for a tapping machine according to the present invention provides advantages in that, since a chuck support member has integral upper and lower ends, drawbacks due to non-concentricity of a chuck support structure in the conventional master spindle can be eliminated, and the length of the entire chuck support structure can be decreased, whereby the fluctuation of the master spindle during tapping is lessened and the precision of tapping work is improved.
- Also, in the master spindle for a tapping machine according to the present invention, due to the presence of an umbrella-shaped chip cover, it is possible to prevent chip particles from entering the gap between a bushing nut and a spindle bolt and avoid the breakage of screw threads of the bushing nut and the spindle bolt.
- Further, in the master spindle for a tapping machine according to the present invention, by the fact that the chuck support member is defined with a tap separation hole for easy separation of a tap from a chuck, even when chip particles are introduced into the chuck while tapping work is implemented in a vertical direction, it is possible to push the lower end of the tap out of the chuck by a lever inserted through the tap separation hole, whereby the tap can be reliably separated from the chuck as the occasion demands.
- Moreover, in the master spindle for a tapping machine according to the present invention, because tapped holes are defined in a flange portion of the bushing nut, the bushing nut can be mounted to a jig irrespective of the position of the jig.
- Furthermore, in the master spindle for a tapping machine according to the present invention, due to the fact that a fluctuation correcting cap can lessen the fluctuation of a spindle body, even when the screw threads of the bushing nut and the spindle bolt are abraded, the tapping work can be reliably implemented. Also, it is possible to extend the service lives of the bushing nut and the spindle bolt and prevent chip particles generated during tapping from entering the gap between the bushing nut and the spindle bolt.
- Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
- The above objects, and other features and advantages of the present invention will become more apparent after a reading of the following detailed description when taken in conjunction with the drawings, in which:
-
FIG. 1 is a half sectional view illustrating a conventional master spindle for a tapping machine; -
FIG. 2 is a half sectional view illustrating the master spindle ofFIG. 1 in a state in which tapping is implemented in a vertical direction; -
FIG. 3 is a perspective view independently illustrating the bushing nut shown inFIGS. 1 and 2 ; -
FIG. 4 is a half sectional view illustrating a master spindle for a tapping machine in accordance with an embodiment of the present invention; -
FIG. 5 is a half sectional view illustrating the master spindle ofFIG. 4 in a state in which tapping is implemented in a vertical direction; -
FIG. 6 is a half sectional view illustrating the master spindle according to the present invention, with a fluctuation correcting cap fitted around a chuck support member; -
FIG. 7 is a half sectional view independently illustrating the fluctuation correcting cap; -
FIG. 8 is a perspective view illustrating a bushing nut; and -
FIG. 9 is a half sectional view illustrating the master spindle with the bushing nut mounted to a jig placed on a flange portion of the bushing nut. - Reference will now be made in greater detail to a preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts.
- Referring to
FIG. 4 , amaster spindle 50 for a tapping machine in accordance with an embodiment of the present invention comprises achuck 53 having atap 51 detachably mounted thereto; achuck support member 55 having thechuck 53 mounted thereto; aspindle bolt 57 fastened to thechuck support member 55 at an upper end thereof; and abushing nut 59 threadedly coupled to thespindle bolt 57 and positioned below thechuck support member 55. - The
chuck support member 55 has an upper end to which thechuck 53 is mounted and a lower end to which thespindle bolt 57 is fastened. The upper and lower ends of thechuck support member 55 are integrally formed with each other. By this fact, the strength of the screw threads of thespindle bolt 57 can be improved, and, as will be described later in detail, it is possible to preventchip particles 100 from entering the gap between thespindle bolt 57 and thebushing nut 59. As a consequence, because thespindle bolt 57 can be used semi-permanently, it is not necessary to employ two separate support members as in the conventional art. - Also, due to the fact that the
chuck support member 55 has integral upper and lower ends, the drawbacks provoked due to non-concentricity of a chuck support structure in the conventional master spindle can be overcome, and the length ‘S’ of the entire chuck support structure can be decreased, whereby the fluctuation of themaster spindle 50 during tapping is lessened and the precision of tapping work is improved. - Referring to
FIG. 5 , an umbrella-shaped chip cover 61 is provided to the lower end of thechuck support member 55. Thechip cover 61 preventschip particles 100 which are generated from a workpiece (not shown), from entering the space between thespindle bolt 57 and thebushing nut 59, even when tapping work is implemented in a vertical direction, so that it is possible to prevent the screw threads of thespindle bolt 57 and thebushing nut 59 from being crushed. - Referring to
FIG. 6 , in a more developed form, in order to prevent thechip particles 100 from entering the space between thespindle bolt 57 and thebushing nut 59 and to prevent thetap 51 from fluctuating, thechuck support member 55 is provided with afluctuation correcting cap 70. - The
fluctuation correcting cap 70 is defined with anopening 77 into which thechuck support member 55 is fitted so that a circumferential outer surface of thechuck support member 55 is brought into tight contact with a circumferentialinner surface 79 of thefluctuation correcting cap 70. Thefluctuation correcting cap 70 has aflange portion 75 which is coupled to thebushing nut 59 bylocking bolts 81. - Consequently, when the
spindle bolt 57 is rotated relative to thebushing nut 59 which is fastened to ajig 91, thechuck support member 55 which is integrally coupled to thespindle bolt 57 is brought into tight contact with the circumferentialinner surface 79 of thefluctuation correcting cap 70 and can be raised and lowered without fluctuating relative to thefluctuation correcting cap 70 fastened to thebushing nut 59. Also, thefluctuation correcting cap 70 functions to prevent thechip particles 100 from entering the space between thespindle bolt 57 and thebushing nut 59. - Referring to
FIG. 7 , thefluctuation correcting cap 70 has a cylindrical configuration similar to thechuck support member 55. An O-ring 71 is fitted in the circumferentialinner surface 79 of thefluctuation correcting cap 70 adjacent to the upper end of thefluctuation correcting cap 70. Anoil inlet hole 73 is defined through thefluctuation correcting cap 70 and communicates with theopening 77. - The O-
ring 71 serves to occupy a gap between thechuck support member 55 and thefluctuation correcting cap 70, so that, when thechuck support member 55 is raised and lowered relative to thefluctuation correcting cap 70, the fluctuation of thechuck support member 55 can be further lessened. - The oil which flows into the
fluctuation correcting cap 70 through theoil inlet hole 75 reduces friction when thechuck support member 55 is rotated relative to thefluctuation correcting cap 70. - Due to the presence of the
fluctuation correcting cap 70 constructed as mentioned above, even when the screw threads of thespindle bolt 57 and thebushing nut 59 are crushed, since thechuck support member 55 slides in thefluctuation correcting cap 70 without fluctuating, thetap 51 is prevented from fluctuating, whereby the tapping work can be reliably implemented and thechip particles 100 generated during implementation of the tapping work can be prevented from entering the space between thespindle bolt 57 and thebushing nut 59. - Referring to
FIGS. 4 and 5 again, thechuck support member 55 is defined below thechuck 53, with atap separation hole 63 for easy separation of thetap 51 from thechuck 53. Hence, when the tapping work is implemented in the vertical direction, if thechip particles 100 are introduced into thechuck 53 and impede easy separation of thetap 51 from thechuck 53, by inserting a lever (not shown) or the like into thetap separation hole 63 to push the lower end of thetap 51 out of thechuck 53, thetap 51 can be easily separated from thechuck 53. - Referring to
FIG. 8 , thebushing nut 59 is defined with mountingholes 59 b andauxiliary mounting holes 59 c. Therefore, as can be readily seen fromFIG. 5 , in the case in which thejig 91 is located under aflange portion 59 a of thebushing nut 59,bolts 83 can pass through the mountingholes 59 b and be locked into auxiliary mountingholes 93 b of thejig 91 to fasten thebushing nut 59 to thejig 91. At this time, as shown inFIG. 6 , as the lockingbolts 81 are locked into the mounting holes 95 b, thefluctuation correcting cap 70 is fastened to thebushing nut 59. Further, in the case in which thejig 91 is located over theflange portion 59 a of thebushing nut 59, asbolts 87 pass through mountingholes 93 c of thejig 91 and are locked into the auxiliary mounting holes 59 c defined in theflange portion 59 a, thebushing nut 59 can be fastened to thejig 91. At this time, as the lockingbolts 81 are locked into the auxiliary mounting holes 59 c, thefluctuation correcting cap 70 is fastened to thebushing nut 59. Hence, the mountingholes 59 b and the auxiliary mounting holes 59 c of thebushing nut 59 allow thebushing nut 59 to be fastened to thejig 91 irrespective of the location of thejig 91.
Claims (7)
1. A master spindle for a tapping machine, comprising:
a chuck having a tap detachably mounted thereto;
a chuck support member having the chuck mounted thereto;
a spindle bolt fastened to the chuck support member at an upper end thereof; and
a bushing nut threadedly coupled to the spindle bolt and positioned below the chuck support member;
wherein the chuck support member has an upper end to which the chuck is mounted and a lower end to which the spindle bolt is fastened, the upper and lower ends being integrally formed with each other.
2. The master spindle according to claim 1 , wherein the chuck support member has a length which is less than that of a conventional chuck support member.
3. The master spindle according to claim 1 , wherein an umbrella-shaped chip cover is provided to the lower end of the chuck support member.
4. The master spindle according to claim 1 , wherein the chuck support member is provided with a fluctuation correcting cap.
5. The master spindle according to claim 4 , wherein the fluctuation correcting cap is defined with an opening into which the chuck support member is fitted so that a circumferential outer surface of the chuck support member is brought into tight contact with a circumferential inner surface of the fluctuation correcting cap, and has a flange portion which is coupled to the bushing nut by bolts; and wherein an O-ring is fitted in the circumferential inner surface of the fluctuation correcting cap adjacent to an upper end of the fluctuation correcting cap, and an oil inlet hole is defined through the fluctuation correcting cap to communicate with the opening.
6. The master spindle according to claim 1 , wherein the chuck support member is defined, below the chuck, with a tap separation hole for easy separation of the tap from the chuck.
7. The master spindle according to claim 1 , wherein the bushing nut has a flange portion which is defined with mounting holes and auxiliary mounting holes.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-0010888 | 2004-02-19 | ||
KR1020040010888A KR100466925B1 (en) | 2004-02-19 | 2004-02-19 | Master spindle of tapping machine |
KR20-2004-0029704U KR200374319Y1 (en) | 2004-10-21 | 2004-10-21 | Master spindle of tapping machine |
KR20-2004-0029704 | 2004-10-21 | ||
PCT/KR2005/000410 WO2005080040A1 (en) | 2004-02-19 | 2005-02-15 | Master spindle for tapping machine |
Publications (1)
Publication Number | Publication Date |
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US20080171605A1 true US20080171605A1 (en) | 2008-07-17 |
Family
ID=34889491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/596,037 Abandoned US20080171605A1 (en) | 2004-02-19 | 2005-02-15 | Master Spindle for Tapping Machine |
Country Status (3)
Country | Link |
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US (1) | US20080171605A1 (en) |
JP (1) | JP4692904B2 (en) |
WO (1) | WO2005080040A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116900423A (en) * | 2023-06-15 | 2023-10-20 | 北京新风航天装备有限公司 | Pneumatic tapping tool and method for screw hole fitter with outer circumference of cabin perpendicular to axis |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104028855A (en) * | 2014-06-10 | 2014-09-10 | 成都大漠石油机械有限公司 | Processing tool for thread line |
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KR200195572Y1 (en) * | 1998-04-07 | 2000-09-01 | 김상재 | A tapping jig device for lathe |
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- 2005-02-15 WO PCT/KR2005/000410 patent/WO2005080040A1/en active Application Filing
- 2005-02-15 JP JP2006554020A patent/JP4692904B2/en not_active Expired - Fee Related
- 2005-02-15 US US10/596,037 patent/US20080171605A1/en not_active Abandoned
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116900423A (en) * | 2023-06-15 | 2023-10-20 | 北京新风航天装备有限公司 | Pneumatic tapping tool and method for screw hole fitter with outer circumference of cabin perpendicular to axis |
Also Published As
Publication number | Publication date |
---|---|
WO2005080040A1 (en) | 2005-09-01 |
JP2007522950A (en) | 2007-08-16 |
JP4692904B2 (en) | 2011-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |