WO2007126283A1 - Rotary table having a function of the dividing plate - Google Patents
Rotary table having a function of the dividing plate Download PDFInfo
- Publication number
- WO2007126283A1 WO2007126283A1 PCT/KR2007/002121 KR2007002121W WO2007126283A1 WO 2007126283 A1 WO2007126283 A1 WO 2007126283A1 KR 2007002121 W KR2007002121 W KR 2007002121W WO 2007126283 A1 WO2007126283 A1 WO 2007126283A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- rotary plate
- hole
- rotary
- workpiece
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
- B23Q16/02—Indexing equipment
- B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
- B23Q16/06—Rotary indexing
- B23Q16/065—Rotary indexing with a continuous drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/066—Bench vices
Definitions
- the present invention relates to a rotary table having the function of a dividing plate. More particularly, the rotary table of the present invention includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip an outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to an upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when a lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate.
- the hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post fixed to the upper surface of the free end of the fixed bracket; a Pitch Circle Diameter (PCD) adaptor coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at the end thereof that extends toward the rotary plate; a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary- plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to the upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin in order to restore the original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged in the lower portion of the post opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protru
- the present invention relates to a rotary table, and more particularly, to a rotary table having the function of a dividing plate.
- the rotary table is generally used to rotate a member to be welded, such as a pipe, in order to carry out orbital welding.
- the rotary table includes an outer frame, a gear box arranged inside the outer frame, supported at both sides on corresponding inside wall faces of the outer frame and equipped with a plurality of gears therein, a reduction motor arranged under and geared to the gear box, and a rotary plate rotatably geared to the gear box and coupled with a rotary shaft.
- a power switch On the outer face of the outer frame, there are also arranged a power switch, a forward/backward switch and a rotating speed adjustment dial.
- the power switch is turned on to actuate a drive motor, and the rotating speed adjustment dial is operated to rotate the rotary plate at a preset speed appropriate for welding.
- the aforementioned rotary table of the prior art is generally used in orbital welding, but not for any other purposes .
- the present invention has been made to solve the foregoing problems of the prior art, and therefore an object of the invention is to provide a rotary table having the function of a dividing plate, which can be used for welding, as well as an operation of marking bolt hole positions on a workpiece .
- Another object of the present invention is to provide a rotary table having the function of a dividing plate, in which protrusions are formed on the upper surface of a rotary plate, and by which holes can be directly formed in a workpiece mounted and held on the rotary plate.
- a rotary table having a function of a dividing plate which includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip the outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to the upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when the lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate.
- the hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post fixed to the upper surface of the free end of the fixed bracket; a PCD adaptor coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at an end thereof that is extended toward the rotary plate; a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to an upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin in order to restore the original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged at a lower portion of the post opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protrudes from one end
- the pitch circle diameter adaptor includes a first coupling flange having a fastening groove formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post and bolt holes formed at both sides of the fastening groove; a second coupling flange having a fastening groove 34a formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post and bolt holes formed at both sides of the fastening groove; bolts screwed into the bolt holes of the first and second fastening flanges; and nuts engaged with the bolts.
- the chuck includes a screw fixing member fastened into the central portion of the slit of the rotary plate, and having a screw through hole extending horizontally and pin holes extending vertically at both sides of the screw through hole; a linear screw having first and second screw portions with threads formed in opposite directions, angled handle coupling portions, each arranged at a free end of each of the first and second screw portions, and a pin support formed between the first and second screw portions, along the outer periphery of the central portion of the linear screw, wherein the linear screw is coupled with the screw through hole of the screw fixing member in such a fashion that the pin support groove is located between the pin holes at both sides of the screw through hole; first and second jaws, the first jaw having a female thread hole corresponding to the first screw portion of the linear screw, so as to be coupled with the first screw portion, the second jaw having a female thread hole corresponding to the second screw portion of the linear screw so as to be coupled with the second screw portion, the first and second jaws reciprocating along the linear screw according to
- the rotary plate has a plurality of protrusions formed on the upper surface thereof at both sides of the slit .
- the rotary table may further include an outer frame; the gear box arranged inside the outer frame, supported at both sides on corresponding inside wall faces of the outer frame and equipped with a plurality of gears therein; a reduction motor arranged under and geared to the gear box; a rotary plate rotatably geared to the gear box and coupled with a rotary shaft; and a power switch, a forward/backward switch and a rotating speed adjustment dial arranged on the outer face of the outer frame.
- the rotary table having the function of a dividing plate according to the present invention has the chuck for simply and directly fixing the workpiece on the rotary plate, and thus does not need a separate shelf chuck. Accordingly, it is possible to reduce the volume and the weight thereof, and reduce the manufacturing cost of the rotary table.
- the circular holes are formed in the outer periphery of the rotary plate corresponding to the positions of holes to be formed in the workpiece, the ball plunger is arranged adjacent to the rotary plate to fit into a corresponding one of the circular holes, and the hole marking unit, located next to the rotary plate, marks the hole positions by adjusting a PCD to the hole positions with a PCD adaptor and a marker pin. Accordingly, it is possible to carry out a welding process on the rotary table as well as to simply mark the hole positions on the workpiece placed on the rotary table.
- the protrusions are formed on the upper surface of the rotary plate to support the workpiece, raised from the upper surface of the rotary plate at a height corresponding to the height of the protrusions. As a result, it is possible to directly perforate the workpiece mounted on and held to the rotary plate.
- FIG. 1 is a perspective view illustrating a rotary table having a function of a dividing plate according to the present invention
- FIG. 2 is an exploded perspective view illustrating the structure of a PCD adaptor according to the present invention
- FIG. 3 is an exploded view schematically illustrating the structure and the assembled state of a ball plunger according to the present invention
- FIG. 4 is an exploded perspective view illustrating the structure of a chuck according to the present invention
- FIG. 5 is a plan view illustrating the chuck and a rotary plate according to the present invention
- FIG. 6 is a plan view illustrating a workpiece fixed by the chuck according to the present invention
- FIG. 7 is a side elevational view of FIG. 6;
- FIG. 8 is a plan view illustrating protrusions formed on the upper surface of the rotary plate according to the present invention.
- FIG. 9 is a cross-sectional view illustrating a drilling operation with the workpiece placed on the upper surface of the rotary plate.
- FIG. 1 is a perspective view illustrating a rotary table having a function of a dividing plate according to the present invention.
- the rotary table of the present invention includes an outer frame 11, defining a body of the rotary table and a gear box 13 arranged inside the outer frame 11.
- the gear box 13 is supported at both ends to corresponding inside wall faces of the outer frame 11, and has a plurality of gears (not shown) arranged therein.
- a reduction motor 12 is arranged under the gear box 13 and is connected by a drive shaft (not shown) to a gear (not shown) of the gear box 13.
- a rotary plate 15 is arranged above the gear box 13 and is connected to a rotary shaft 14 that is rotatably connected to another gear of the gear box 13.
- a power switch 16 On one face of the outer frame 11, there are arranged a power switch 16, a forward/backward switch 17 for setting the rotating direction of the reduction motor 12, and a rotating speed adjustment dial 18 for adjusting the rotating speed of the rotary plate 15.
- a plurality of circular grooves 15a is formed in the outer periphery of the rotary plate 15, in a number corresponding to the number of holes to be formed in a flange or a gasket, and a horizontal slit 15b is formed along a central line of the rotary plate 15.
- a chuck 20, which is arranged inside the slit 15b, is configured to hold and fix an end of a workpiece 50 while reciprocating eccentrically along the slit 15b.
- a hole marking unit fixed to an upper portion of a gear box 13, is arranged at a side of the rotary plate 15.
- the hole marking unit marks the positions of holes to be formed in the workpiece 50, which is placed on the upper surface of the rotary plate 15, when a lower portion of the hole marking unit is aligned with each of the circular holes 15a of the rotary plate 15.
- the hole marking unit includes a fixed bracket 31, a post 32, a Pitch Circle Diameter (PCD) adaptor 35, a marker pin 36, a restoration spring 37, and a ball plunger 40.
- PCD Pitch Circle Diameter
- the fixed bracket 31 is fixed at one end to the upper surface of the gear box 13, and has an upper free end 31a that is bent and positioned at a side of the rotary shaft 15.
- the post 32 is fixed to the upper surface of the free end 31a of the fixed bracket 31.
- the PCD adaptor 35 which is coupled with the post 32, has an end extending toward the rotary plate 15.
- a marker pin holder 34c is fixedly arranged at the extended end of the PCD adaptor 35.
- the PCD adaptor 35 includes a first coupling flange 33 having a fastening groove 33a formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post 32, and bolt holes 33b formed at both sides of the fastening groove
- first and second fastening flanges 33 and 34 are fastened to the post 32 with the fastening grooves 33a and 34a thereof opposite each other, the bolts 38 are screwed into the bolt holes 33b and 34b at both sides of the fastening grooves 33a and 34a, and then the nuts 39 are engaged with the bolts 38 so that the PCD adaptor 35 is coupled to an upper portion of the post 32.
- the marker pin 36 is fastened into the marker pin holder 34c, and has a head 36 and a pointed lower end facing the upper surface of the rotary plate 15.
- the restoration spring 37 which is coupled with the marker pin 36, has a lower end supported to an upper end of the marker pin holder 34c, and an upper end supporting a bottom of the head 36a of the marker pin 36 in order to restore the original position right after the pressing of the marker pin 36, thereby returning the marker pin 36 upward.
- the ball plunger 40 is fixedly arranged in a lower portion of the post 32 opposite the outer periphery of the rotary plate 15, and has a plunger ball 43 protruding from one end thereof.
- the plunger ball 43 is configured to match with or fit into the circular grooves 15a of the rotary plate 15.
- a screw hole 32a is formed in the lower portion of the post 32, horizontally extending through the post 32, so that the ball plunger 40 is fixedly screwed into the screw hole 32a.
- the ball plunger 40 includes a hexa-screw 41, which has an inner space and one opened end, and a spring 42 arranged inside the hexa-screw 41.
- the plunger ball 43 is elastically supported by the spring 42 inside the hexa-screw 41 so as to partially protrude through the one opened end of the hexa- screw 41, a portion of the protruding plunger ball 43 fitting into a corresponding one of the circular grooves 15a of the rotary plate 15.
- the plunger ball 43 Since the plunger ball 43 is elastically supported by the spring 42, when the plunger ball 43, fitted into the circular groove 15a, leaves the circular groove 15a and contacts the outer circumference of the rotary plate 15, the plunger ball 43 is pressed in the inward direction of the hexa-screw 41. When the plunger ball 43 is again positioned corresponding to any of the circular groove 15a, the spring 42 inside the hexa-screw 41 pushes the plunger ball 43 so that the plunger ball 43 fits into the circular groove 15a.
- the chuck 20, placed in the slit 15b of the rotary- plate 15, includes a screw fixing member 21, a linear screw 23, a first jaw 24, a second jaw 25, and fixing pins 22 as shown in FIG. 4.
- the screw fixing member 21 is fastened into a central portion of the slit 15b of the rotary plate 15, and has a screw through hole 21a, formed horizontally, and pin holes
- the linear screw 23 includes first and second screw portions 23a and 23a' having threads formed in opposite directions and angled handle coupling portions 23b, each arranged at the free end of each of the first and second screw portions 23a and 23a' .
- a pin support groove 23c is formed between the first and second screw portions 23a and 23a' , along the outer periphery of the central portion of the linear screw 23.
- the linear screw 23 is coupled with the screw through hole 21a of the screw fixing hole 21 in such a fashion that the pin support groove 23c is located between the pin holes 21b at both sides of the screw through hole 21a.
- the first jaw 24 has a female thread hole 24a corresponding to the first screw portion 23a of the linear screw 23, so that the first jaw 24 is coupled with the first screw portion 23a
- the second jaw 25 has a female thread hole 25a corresponding to the second screw portion 23a' of the linear screw 23, so that the second jaw 25 is coupled with the second screw portion 23a'
- Arc-shaped gripper portions 24b and 25b for gripping outer peripheral portions of the workpiece 50 are arranged respectively in upper portions of the first and second jaws 24 and 25, so that the first and second jaws 24 and 25 can hold the workpiece 50, which may be disk-shaped or angled, while reciprocating along the linear screw 23 according to the rotating direction thereof .
- the fixing pins 22 are fitted into the pin holes 21b of the screw fixing member 21 and are closely supported to the pin support grooves 23c of the linear screw 23, as shown in FIG. 5, in order to prevent the escape of the linear screw 23 to the right or left during the rotation thereof.
- the rotary table according to the present invention has the function of a dividing plate in order to mark the position of holes to be formed in a workpiece when welding.
- the workpiece 50 is placed on the rotary plate 15 and is then fixedly gripped by the chuck 20.
- a handle (not shown) is coupled with one of the handle coupling portions 23b of the linear screw 23 of the chuck 20, and is then turned clockwise to drive the opposing first and second jaws 24 and 25 forward.
- the first and second jaws 24 and 25 move forward, the first and second jaws 24 and 25 closely contact corresponding peripheral portions of the workpiece 50 and grip the workpiece 50, thereby fixing the workpiece 50 on the rotary plate 15, as shown in FIGS. 6 and 7.
- the tightness of the bolts 38 and the nuts 39 fixing the PCD adaptor 35 is decreased.
- the first coupling flange 33 and the second coupling flange 34 are aligned with a PCD in the hole position, to be marked on the workpiece 50 through rotation to the right and the left, and then the bolts 38 and the nuts 39 are fixed by tightening.
- the plunger ball 43 of the ball plunger 40 fixed to the lower portion of the post 32, fits into a corresponding one of the circular holes 15a in the outer periphery of the rotary plate 15.
- the power switch 16 on the outer frame 11 is then turned on, and thus the reduction motor 12 is actuated. Then, the gears in the gear box 13, and thus the rotary shaft 14 connected to the gear box 13, start to rotate, thereby turning the rotary plate 15.
- the plunger ball 43 of the ball plunger 40 leaves one of the circular holes 15a in the outer periphery of the rotary plate 15, into which the plunger ball 43 is initially fitted, to tightly contact the outer periphery of the rotary plate 15, pushed in the inward direction of the screw 41.
- the next one of the circular holes 15a moves toward the ball plunger 40.
- the plunger ball 43 snaps into the next circular hole 15a from the pushed position, where the plunger ball 43 tightly contacts the outer periphery of the rotary plate 15.
- an operator controls the rotating speed adjustment dial 18 to stop the rotation of the rotary plate 15.
- the operator strikes the head 3 ⁇ a of the marker pin 36, fastened with the marker pin holder 34c of the PCD adaptor 35, with a tool such as a hammer.
- the spring 42 placed at an upper portion of the marker pin holder 34c while supporting the marker pin 36, is pressed down. Then, the pointed lower end of the marker pin 36 is pushed against a corresponding point on the workpiece, thereby marking a hole position thereon.
- the marker pin 36 After the instantaneous descent, the marker pin 36 returns to its original position as the spring 42 is restored from its contracted state.
- the operator again rotates the rotary plate 15 using the rotating speed adjustment dial 18 and, after rotating the rotary plate 5, repeats the aforementioned procedures to mark a next position where a hole will be formed in the workpiece 50.
- the handle coupled with the handle coupling portion 23b of the linear screw 23, is turned counterclockwise to rotate the linear screw 23 counterclockwise .
- the first and second jaws 24 and 25 are moved backward to release the corresponding peripheral portions of the workpiece 50, so that the machined workpiece 50 can be removed from the rotary plate 15.
- a new workpiece is fixed to the upper surface of the rotary plate 15, and hole positions are marked on the new workpiece according to the aforementioned process .
- the chuck 20 is arranged on the central line of the rotary plate 15 to grip the workpiece 50. Accordingly, it is possible to grip the workpiece 50 on the rotary plate 15 with the chuck 20 without having to use a conventional separate shelf chuck, which is configured to grip and fasten the workpiece 50 onto the rotary plate 15.
- the upper gripping portions 24b and 25b of the first and second jaws 24 and 25 of the chuck 20 are arc-shaped, and thus can very easily grip the corresponding peripheral portions of the disk-shaped workpiece 50 to fix the same.
- the circular grooves 15a are formed in a plural number in the outer periphery of the rotary plate 15, and the hole marking unit is arranged at a side of the rotary plate 15. At the rotation of the rotary plate 15, the plunger ball 43 of the ball plunger 40 snaps sequentially into the circular holes 15a of the rotary plate 15.
- the present invention makes it possible to simply and directly fix the workpiece 50 onto the rotary plate 15. Furthermore, because the hole positions of the workpiece 50 to be divided can be correctly marked by the hole marking unit, a welding operation and/or an operation with a dividing plate are made easier.
- a plurality of protrusions 15c is formed on the upper surface of the rotary plate 15, extending from the outer periphery of the rotary plate 15 toward the center thereof at both sides of the slit 15b. Accordingly, as shown in FIG. 9, it is possible to directly perforate the workpiece 50, mounted on and held to the rotary plate 15, as well as keep the workpiece 50 raised from the upper surface of the rotary plate 15 at a height corresponding to the height of the protrusions 15c. As a result, even when a drill 7 penetrates the workpiece 50, the upper surface of the rotary plate 15 is not perforated.
- the rotary table has the function of a dividing plate, and more particularly, includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip the outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to the upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when a lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate.
- the hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post, fixed to the upper surface of the free end of the fixed bracket; a PCD adaptor coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at an end thereof extending toward the rotary plate,- a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to the upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin so that it can restore its original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged in a lower portion of the post, opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protrudes from one end
- the rotary table having a function of a dividing plate according to the present invention can be used for orbital welding, in which a member to be welded, such as a pipe, is rotated, and as a table on which a workpiece is machined with a machine tool .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
A rotary table (10) having a function of a dividing plate has a chuck (20) for simply and directly fixing a workpiece (50) on a rotary plate (15) without requiring a separate shelf chuck, in order to reduce the volume, the weight, and the manufacturing cost thereof. The circular holes (15a) are formed in the outer periphery of the rotary plate corresponding to positions of holes to be formed in the workpiece, a ball plunger (40) is arranged adjacent to the rotary plate to fit into a corresponding one of the circular holes, and a hole marking unit, arranged next to the rotary plate, marks the hole positions by adjusting a PCD to the hole positions with a PCD adaptor (35) and a marker pin (36). Welding is carried out on the rotary table, and the hole positions are simply marked on the workpiece placed on the rotary table. Protrusions (15c) are formed on the upper surface of the rotary plate to support the workpiece raised from the upper surface of the rotary plate at a height corresponding to the height of the protrusions, so that the workpiece, mounted on and held to the rotary plate, can be directly perforated.
Description
[DESCRIPTION]
[invention Title]
ROTARY TABLE HAVING A FUNCTION OF THE DIVIDING PLATE
[Technical Field]
The present invention relates to a rotary table having the function of a dividing plate. More particularly, the rotary table of the present invention includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip an outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to an upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when a lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate. The hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post fixed to the upper surface of the free end of the fixed bracket; a Pitch Circle Diameter (PCD) adaptor coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at the end thereof that
extends toward the rotary plate; a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary- plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to the upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin in order to restore the original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged in the lower portion of the post opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protrudes from one end thereof and has a configuration matching that of the circular grooves of the rotary plate.
[Background Art]
The present invention relates to a rotary table, and more particularly, to a rotary table having the function of a dividing plate. The rotary table is generally used to rotate a member to be welded, such as a pipe, in order to carry out orbital welding.
Typically, the rotary table includes an outer frame, a gear box arranged inside the outer frame, supported at both sides on corresponding inside wall faces of the outer frame and equipped with a plurality of gears therein, a reduction
motor arranged under and geared to the gear box, and a rotary plate rotatably geared to the gear box and coupled with a rotary shaft. On the outer face of the outer frame, there are also arranged a power switch, a forward/backward switch and a rotating speed adjustment dial.
In order to perform welding with the rotary table, the power switch is turned on to actuate a drive motor, and the rotating speed adjustment dial is operated to rotate the rotary plate at a preset speed appropriate for welding. The aforementioned rotary table of the prior art is generally used in orbital welding, but not for any other purposes .
In addition, a shelf chuck for fixing the welding member must be mounted on the rotary plate. This as a result disadvantageously increases the volume and the weight of the rotary table, and also raises the manufacturing cost thereof .
[Disclosure] [Technical Problem]
The present invention has been made to solve the foregoing problems of the prior art, and therefore an object of the invention is to provide a rotary table having the function of a dividing plate, which can be used for welding, as well as an operation of marking bolt hole positions on a workpiece .
Another object of the present invention is to provide a rotary table having the function of a dividing plate, in which protrusions are formed on the upper surface of a rotary plate, and by which holes can be directly formed in a workpiece mounted and held on the rotary plate.
[Technical Solution]
In order to realize the aforementioned objects, there is provided a rotary table having a function of a dividing plate which includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip the outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to the upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when the lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate.
Preferably, the hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post fixed to the upper surface of the free end of the fixed bracket; a PCD adaptor
coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at an end thereof that is extended toward the rotary plate; a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to an upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin in order to restore the original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged at a lower portion of the post opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protrudes from one end thereof and has a configuration matching that of the circular grooves of the rotary plate.
Preferably, the pitch circle diameter adaptor includes a first coupling flange having a fastening groove formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post and bolt holes formed at both sides of the fastening groove; a second coupling flange having a fastening groove 34a formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post and bolt holes formed at both sides of the fastening groove; bolts
screwed into the bolt holes of the first and second fastening flanges; and nuts engaged with the bolts.
Preferably, the chuck includes a screw fixing member fastened into the central portion of the slit of the rotary plate, and having a screw through hole extending horizontally and pin holes extending vertically at both sides of the screw through hole; a linear screw having first and second screw portions with threads formed in opposite directions, angled handle coupling portions, each arranged at a free end of each of the first and second screw portions, and a pin support formed between the first and second screw portions, along the outer periphery of the central portion of the linear screw, wherein the linear screw is coupled with the screw through hole of the screw fixing member in such a fashion that the pin support groove is located between the pin holes at both sides of the screw through hole; first and second jaws, the first jaw having a female thread hole corresponding to the first screw portion of the linear screw, so as to be coupled with the first screw portion, the second jaw having a female thread hole corresponding to the second screw portion of the linear screw so as to be coupled with the second screw portion, the first and second jaws reciprocating along the linear screw according to the rotating directions thereof; and fixing pins fitted into the pin holes of the screw fixing member and closely supported to the pin support grooves of the
linear screw in order to prevent an escape of the linear screw in a right or left direction while the linear screw is rotated.
Preferably, the rotary plate has a plurality of protrusions formed on the upper surface thereof at both sides of the slit .
In addition, the rotary table may further include an outer frame; the gear box arranged inside the outer frame, supported at both sides on corresponding inside wall faces of the outer frame and equipped with a plurality of gears therein; a reduction motor arranged under and geared to the gear box; a rotary plate rotatably geared to the gear box and coupled with a rotary shaft; and a power switch, a forward/backward switch and a rotating speed adjustment dial arranged on the outer face of the outer frame.
[Advantageous Effects]
The rotary table having the function of a dividing plate according to the present invention has the chuck for simply and directly fixing the workpiece on the rotary plate, and thus does not need a separate shelf chuck. Accordingly, it is possible to reduce the volume and the weight thereof, and reduce the manufacturing cost of the rotary table. The circular holes are formed in the outer periphery of the rotary plate corresponding to the positions of holes to be formed in the workpiece, the ball plunger is arranged
adjacent to the rotary plate to fit into a corresponding one of the circular holes, and the hole marking unit, located next to the rotary plate, marks the hole positions by adjusting a PCD to the hole positions with a PCD adaptor and a marker pin. Accordingly, it is possible to carry out a welding process on the rotary table as well as to simply mark the hole positions on the workpiece placed on the rotary table.
Furthermore, according to the present invention, the protrusions are formed on the upper surface of the rotary plate to support the workpiece, raised from the upper surface of the rotary plate at a height corresponding to the height of the protrusions. As a result, it is possible to directly perforate the workpiece mounted on and held to the rotary plate.
[Description of Drawings]
FIG. 1 is a perspective view illustrating a rotary table having a function of a dividing plate according to the present invention;
FIG. 2 is an exploded perspective view illustrating the structure of a PCD adaptor according to the present invention;
FIG. 3 is an exploded view schematically illustrating the structure and the assembled state of a ball plunger according to the present invention;
FIG. 4 is an exploded perspective view illustrating the structure of a chuck according to the present invention;
FIG. 5 is a plan view illustrating the chuck and a rotary plate according to the present invention; FIG. 6 is a plan view illustrating a workpiece fixed by the chuck according to the present invention;
FIG. 7 is a side elevational view of FIG. 6;
FIG. 8 is a plan view illustrating protrusions formed on the upper surface of the rotary plate according to the present invention; and
FIG. 9 is a cross-sectional view illustrating a drilling operation with the workpiece placed on the upper surface of the rotary plate.
[Best Mode]
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings. FIG. 1 is a perspective view illustrating a rotary table having a function of a dividing plate according to the present invention. As shown in FIG. 1, the rotary table of the present invention includes an outer frame 11, defining a body of the rotary table and a gear box 13 arranged inside the outer frame 11. The gear box 13 is supported at both ends to corresponding inside wall faces of the outer frame
11, and has a plurality of gears (not shown) arranged therein.
A reduction motor 12 is arranged under the gear box 13 and is connected by a drive shaft (not shown) to a gear (not shown) of the gear box 13.
A rotary plate 15 is arranged above the gear box 13 and is connected to a rotary shaft 14 that is rotatably connected to another gear of the gear box 13.
On one face of the outer frame 11, there are arranged a power switch 16, a forward/backward switch 17 for setting the rotating direction of the reduction motor 12, and a rotating speed adjustment dial 18 for adjusting the rotating speed of the rotary plate 15.
According to an aspect of the invention, a plurality of circular grooves 15a is formed in the outer periphery of the rotary plate 15, in a number corresponding to the number of holes to be formed in a flange or a gasket, and a horizontal slit 15b is formed along a central line of the rotary plate 15. A chuck 20, which is arranged inside the slit 15b, is configured to hold and fix an end of a workpiece 50 while reciprocating eccentrically along the slit 15b.
Further, a hole marking unit, fixed to an upper portion of a gear box 13, is arranged at a side of the rotary plate 15. The hole marking unit marks the positions of holes to be formed in the workpiece 50, which is placed
on the upper surface of the rotary plate 15, when a lower portion of the hole marking unit is aligned with each of the circular holes 15a of the rotary plate 15.
As shown in FIG. 2, the hole marking unit includes a fixed bracket 31, a post 32, a Pitch Circle Diameter (PCD) adaptor 35, a marker pin 36, a restoration spring 37, and a ball plunger 40.
The fixed bracket 31 is fixed at one end to the upper surface of the gear box 13, and has an upper free end 31a that is bent and positioned at a side of the rotary shaft 15. The post 32 is fixed to the upper surface of the free end 31a of the fixed bracket 31.
The PCD adaptor 35, which is coupled with the post 32, has an end extending toward the rotary plate 15. A marker pin holder 34c is fixedly arranged at the extended end of the PCD adaptor 35.
More specifically, the PCD adaptor 35 includes a first coupling flange 33 having a fastening groove 33a formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post 32, and bolt holes 33b formed at both sides of the fastening groove
33a, a second coupling flange 34 having a fastening groove
34a formed in a central portion thereof and curved semi- circularly to closely engage with the outer periphery of the post 32, and bolt holes 34b formed at both sides of the fastening groove 34a, bolts 38 screwed into the bolt holes
33b and 34b of the first and second fastening flanges 33 and 34 and nuts 39 engaged with the bolts 38.
Accordingly, the first and second fastening flanges 33 and 34 are fastened to the post 32 with the fastening grooves 33a and 34a thereof opposite each other, the bolts 38 are screwed into the bolt holes 33b and 34b at both sides of the fastening grooves 33a and 34a, and then the nuts 39 are engaged with the bolts 38 so that the PCD adaptor 35 is coupled to an upper portion of the post 32. The marker pin 36 is fastened into the marker pin holder 34c, and has a head 36 and a pointed lower end facing the upper surface of the rotary plate 15.
The restoration spring 37, which is coupled with the marker pin 36, has a lower end supported to an upper end of the marker pin holder 34c, and an upper end supporting a bottom of the head 36a of the marker pin 36 in order to restore the original position right after the pressing of the marker pin 36, thereby returning the marker pin 36 upward. The ball plunger 40 is fixedly arranged in a lower portion of the post 32 opposite the outer periphery of the rotary plate 15, and has a plunger ball 43 protruding from one end thereof. The plunger ball 43 is configured to match with or fit into the circular grooves 15a of the rotary plate 15.
A screw hole 32a is formed in the lower portion of the post 32, horizontally extending through the post 32, so that the ball plunger 40 is fixedly screwed into the screw hole 32a. In greater detail, as shown in FIG. 3, the ball plunger 40 includes a hexa-screw 41, which has an inner space and one opened end, and a spring 42 arranged inside the hexa-screw 41. The plunger ball 43 is elastically supported by the spring 42 inside the hexa-screw 41 so as to partially protrude through the one opened end of the hexa- screw 41, a portion of the protruding plunger ball 43 fitting into a corresponding one of the circular grooves 15a of the rotary plate 15.
Since the plunger ball 43 is elastically supported by the spring 42, when the plunger ball 43, fitted into the circular groove 15a, leaves the circular groove 15a and contacts the outer circumference of the rotary plate 15, the plunger ball 43 is pressed in the inward direction of the hexa-screw 41. When the plunger ball 43 is again positioned corresponding to any of the circular groove 15a, the spring 42 inside the hexa-screw 41 pushes the plunger ball 43 so that the plunger ball 43 fits into the circular groove 15a.
The chuck 20, placed in the slit 15b of the rotary- plate 15, includes a screw fixing member 21, a linear screw 23, a first jaw 24, a second jaw 25, and fixing pins 22 as shown in FIG. 4.
The screw fixing member 21 is fastened into a central portion of the slit 15b of the rotary plate 15, and has a screw through hole 21a, formed horizontally, and pin holes
21b formed vertically at both sides of the screw through hole 21a.
The linear screw 23 includes first and second screw portions 23a and 23a' having threads formed in opposite directions and angled handle coupling portions 23b, each arranged at the free end of each of the first and second screw portions 23a and 23a' . A pin support groove 23c is formed between the first and second screw portions 23a and 23a' , along the outer periphery of the central portion of the linear screw 23.
The linear screw 23 is coupled with the screw through hole 21a of the screw fixing hole 21 in such a fashion that the pin support groove 23c is located between the pin holes 21b at both sides of the screw through hole 21a.
The first jaw 24 has a female thread hole 24a corresponding to the first screw portion 23a of the linear screw 23, so that the first jaw 24 is coupled with the first screw portion 23a, and the second jaw 25 has a female thread hole 25a corresponding to the second screw portion 23a' of the linear screw 23, so that the second jaw 25 is coupled with the second screw portion 23a' . Arc-shaped gripper portions 24b and 25b for gripping outer peripheral portions of the workpiece 50 are arranged
respectively in upper portions of the first and second jaws 24 and 25, so that the first and second jaws 24 and 25 can hold the workpiece 50, which may be disk-shaped or angled, while reciprocating along the linear screw 23 according to the rotating direction thereof .
The fixing pins 22 are fitted into the pin holes 21b of the screw fixing member 21 and are closely supported to the pin support grooves 23c of the linear screw 23, as shown in FIG. 5, in order to prevent the escape of the linear screw 23 to the right or left during the rotation thereof.
With the structure as mentioned above, the rotary table according to the present invention has the function of a dividing plate in order to mark the position of holes to be formed in a workpiece when welding. In the case of marking a predetermined number of bolt hole positions in the workpiece 50, such as a flange or a gasket, the workpiece 50 is placed on the rotary plate 15 and is then fixedly gripped by the chuck 20.
That is, after the workpiece 50 is placed on the rotary plate 15, a handle (not shown) is coupled with one of the handle coupling portions 23b of the linear screw 23 of the chuck 20, and is then turned clockwise to drive the opposing first and second jaws 24 and 25 forward.
As the first and second jaws 24 and 25 move forward, the first and second jaws 24 and 25 closely contact corresponding peripheral portions of the workpiece 50 and
grip the workpiece 50, thereby fixing the workpiece 50 on the rotary plate 15, as shown in FIGS. 6 and 7.
When the workpiece 50 is fixed on the rotary plate 15 by the chuck 20, the tightness of the bolts 38 and the nuts 39 fixing the PCD adaptor 35 is decreased. Next, the first coupling flange 33 and the second coupling flange 34 are aligned with a PCD in the hole position, to be marked on the workpiece 50 through rotation to the right and the left, and then the bolts 38 and the nuts 39 are fixed by tightening. At this time, the plunger ball 43 of the ball plunger 40, fixed to the lower portion of the post 32, fits into a corresponding one of the circular holes 15a in the outer periphery of the rotary plate 15.
The power switch 16 on the outer frame 11 is then turned on, and thus the reduction motor 12 is actuated. Then, the gears in the gear box 13, and thus the rotary shaft 14 connected to the gear box 13, start to rotate, thereby turning the rotary plate 15.
As the rotary table 15 starts to rotate, the plunger ball 43 of the ball plunger 40 leaves one of the circular holes 15a in the outer periphery of the rotary plate 15, into which the plunger ball 43 is initially fitted, to tightly contact the outer periphery of the rotary plate 15, pushed in the inward direction of the screw 41. With the rotary plate 15 rotating further, the next one of the circular holes 15a moves toward the ball plunger
40. When the next circular hole 15a reaches a position corresponding to the ball plunger 40, the plunger ball 43 snaps into the next circular hole 15a from the pushed position, where the plunger ball 43 tightly contacts the outer periphery of the rotary plate 15.
Then, an operator controls the rotating speed adjustment dial 18 to stop the rotation of the rotary plate 15. When the rotary plate 15 stops, the operator strikes the head 3βa of the marker pin 36, fastened with the marker pin holder 34c of the PCD adaptor 35, with a tool such as a hammer.
In response to the operator striking the marker pin 36, the spring 42, placed at an upper portion of the marker pin holder 34c while supporting the marker pin 36, is pressed down. Then, the pointed lower end of the marker pin 36 is pushed against a corresponding point on the workpiece, thereby marking a hole position thereon.
After the instantaneous descent, the marker pin 36 returns to its original position as the spring 42 is restored from its contracted state.
When the marking of the hole position is finished, the operator again rotates the rotary plate 15 using the rotating speed adjustment dial 18 and, after rotating the rotary plate 5, repeats the aforementioned procedures to mark a next position where a hole will be formed in the workpiece 50.
When the operation of marking hole positions on the workpiece 50 is accomplished, the handle, coupled with the handle coupling portion 23b of the linear screw 23, is turned counterclockwise to rotate the linear screw 23 counterclockwise .
Then, the first and second jaws 24 and 25 are moved backward to release the corresponding peripheral portions of the workpiece 50, so that the machined workpiece 50 can be removed from the rotary plate 15. After the machined workpiece 50 is removed, a new workpiece is fixed to the upper surface of the rotary plate 15, and hole positions are marked on the new workpiece according to the aforementioned process .
In the rotary table having a function of a dividing plate according to the invention, the chuck 20 is arranged on the central line of the rotary plate 15 to grip the workpiece 50. Accordingly, it is possible to grip the workpiece 50 on the rotary plate 15 with the chuck 20 without having to use a conventional separate shelf chuck, which is configured to grip and fasten the workpiece 50 onto the rotary plate 15.
Without the mounting of the conventional shelf chuck, which is bulky and heavy, it is possible to reduce the weight, facilitate the treatment and save the manufacturing cost of the rotary table 10.
The upper gripping portions 24b and 25b of the first and second jaws 24 and 25 of the chuck 20 are arc-shaped, and thus can very easily grip the corresponding peripheral portions of the disk-shaped workpiece 50 to fix the same. Specifically, in the rotary table 10 of the invention, the circular grooves 15a are formed in a plural number in the outer periphery of the rotary plate 15, and the hole marking unit is arranged at a side of the rotary plate 15. At the rotation of the rotary plate 15, the plunger ball 43 of the ball plunger 40 snaps sequentially into the circular holes 15a of the rotary plate 15. Hence, it is possible for the operator to correctly recognize marking positions of holes to be formed in the workpiece 50 and correctly mark the hole positions on the workpiece 50. Accordingly, the present invention makes it possible to simply and directly fix the workpiece 50 onto the rotary plate 15. Furthermore, because the hole positions of the workpiece 50 to be divided can be correctly marked by the hole marking unit, a welding operation and/or an operation with a dividing plate are made easier.
According to another embodiment of the present invention, as shown in FIG. 8, a plurality of protrusions 15c is formed on the upper surface of the rotary plate 15, extending from the outer periphery of the rotary plate 15 toward the center thereof at both sides of the slit 15b.
Accordingly, as shown in FIG. 9, it is possible to directly perforate the workpiece 50, mounted on and held to the rotary plate 15, as well as keep the workpiece 50 raised from the upper surface of the rotary plate 15 at a height corresponding to the height of the protrusions 15c. As a result, even when a drill 7 penetrates the workpiece 50, the upper surface of the rotary plate 15 is not perforated.
While the present invention has been described with reference to particular illustrative embodiments and the accompanying drawings, it is not limited thereto, but will be defined by the appended claims. It is to be appreciated that those skilled in the art can substitute, change or modify the embodiments into various forms without departing from the scope and spirit of the present invention.
[industrial Applicability]
According to the present invention, as set forth above, the rotary table has the function of a dividing plate, and more particularly, includes a rotary plate having a plurality of circular grooves formed in an outer periphery thereof and a horizontal slit formed on a central line, wherein a chuck is arranged inside the slit to reciprocate along the slit and to grip the outer peripheral portion of a workpiece, thereby fixing the workpiece; and a hole marking unit fixed to the upper portion of a gear box and placed at a side of the rotary plate, wherein the hole marking unit
marks the positions of holes to be formed in the workpiece, which is placed on the upper surface of the rotary plate, when a lower portion of the hole marking unit is aligned with each of the circular holes of the rotary plate. The hole marking unit includes a fixed bracket fixed at one end to the upper surface of the gear box and having an upper free end that is bent and positioned at a side of the rotary shaft; a post, fixed to the upper surface of the free end of the fixed bracket; a PCD adaptor coupled with the post, the PCD adaptor having a marker pin holder fixedly arranged at an end thereof extending toward the rotary plate,- a marker pin fastened into the marker pin holder, the marker pin having a head and a pointed lower end facing the upper surface of the rotary plate; a restoration spring coupled with the marker pin, the restoration spring having a lower end supported to the upper end of the marker pin holder and an upper end supporting the bottom of the head of the marker pin so that it can restore its original position right after the pressing of the marker pin, thereby returning the marker pin upward; and a ball plunger fixedly arranged in a lower portion of the post, opposite the outer periphery of the rotary plate, the ball plunger having a plunger ball which protrudes from one end thereof and has a configuration matching that of the circular grooves of the rotary plate. Furthermore, according to the present invention, the protrusions are formed on the upper surface of the rotary
plate, so that the workpiece can be directly perforated in a state of being mounted on and held to the rotary plate.
Accordingly, the rotary table having a function of a dividing plate according to the present invention can be used for orbital welding, in which a member to be welded, such as a pipe, is rotated, and as a table on which a workpiece is machined with a machine tool .
Claims
[CLAIMS]
[Claim l]
A rotary table, comprising: a rotary plate (15) having a plurality of circular grooves 15a formed in an outer periphery thereof and a horizontal slit (15b) formed on a central line, wherein a chuck (20) is arranged inside the slit (15b) to reciprocate along the slit (15b) and to grip an outer peripheral portion of a workpiece (50) , thereby fixing the workpiece (50) ; and a hole marking unit fixed to an upper portion of a gear box (13) and placed at a side of the rotary plate (15) , wherein the hole marking unit marks positions of holes to be formed in the workpiece (50) , which is placed on an upper surface of the rotary plate (15) , when a lower portion of the hole marking unit is aligned with each of the circular holes (15a) of the rotary plate (15) , whereby the rotary table has a function of a dividing plate.
[Claim 2]
The rotary table according to claim 1, wherein the hole marking unit includes: a fixed bracket (31) fixed at one end to an upper surface of the gear box (13) and having an upper free end (31a) that is bent and positioned at a side of the rotary shaft (15) ; a post (32) , fixed to an upper surface of the free end 31a of the fixed bracket (31) ; a pitch circle diameter adaptor (35) coupled with the post (32) , the pitch circle diameter adaptor (35) having a marker pin holder (34c) fixedly arranged at an end thereof extending toward the rotary plate (15) ; a marker pin (36) fastened into the marker pin holder
(34c) , the marker pin (36) having a head (36) and a pointed lower end facing the upper surface of the rotary plate (15) ; a restoration spring (37) coupled with the marker pin
(36) , the restoration spring (37) having a lower end supported to an upper end of the marker pin holder (34c) and an upper end supporting a bottom of the head (36a) of the marker pin (36) so that an original position thereof can be restored right after the marker pin (36) is pressed, thereby returning the marker pin (36) upward; and a ball plunger (40) fixedly arranged in a lower portion of the post (32) opposite the outer periphery of the rotary plate (15) , the ball plunger (40) having a plunger ball (43) which protrudes from one end thereof and has a configuration matching that of the circular grooves (15a) of the rotary plate (15) .
[Claim 3] The rotary table according to claim 2, wherein the pitch circle diameter adaptor (35) includes: a first coupling flange (33) having a fastening groove
(33a) formed in a central portion thereof and curved semi- circularly to closely engage with the outer periphery of the post (32) , and bolt holes (33b) formed at both sides of the fastening groove (33a) ; a second coupling flange (34) having a fastening groove (34a) formed in a central portion thereof and curved semi-circularly to closely engage with the outer periphery of the post (32) , and bolt holes (34b) formed at both sides of the fastening groove (34a) ; bolts (38) screwed into the bolt holes (33b and 34b) of the first and second fastening flanges (33 and 34) ; and nuts (39) engaged with the bolts (38) .
[Claim 4]
The rotary table according to claim 1, wherein the chuck (20) includes: a screw fixing member (21) fastened into a central portion of the slit (15b) of the rotary plate (15) , and having a screw through hole (21a) extending horizontally and pin holes (21b) extending vertically at both sides of the screw through hole (21a) ; a linear screw (23) having first and second screw portions (23a and 23a' ) , with threads formed in opposite directions, angled handle coupling portions (23b) each arranged at a free end of each of the first and second screw portions (23a and 23a' ) , and a pin support groove (23c) formed between the first and second screw portions (23a and 23a' ) , along the outer periphery of a central portion of the linear screw (23) , wherein the linear screw (23) is coupled with the screw through hole (21a) of the screw fixing hole (21) in such a fashion that the pin support groove (23c) is located between the pin holes (21b) at both sides of the screw through hole (21a) ; first and second jaws (24 and 25) , the first jaw (24) having a female thread hole (24a) corresponding to the first screw portion (23a) of the linear screw (23) so as to be coupled with the first screw portion (23a) , the second jaw (25) having a female thread hole (25a) corresponding to the second screw portion (23a') of the linear screw (23) so as to be coupled with the second screw portion (23a' ) , the first and second jaws (24 and 25) reciprocating along the linear screw (23) according to rotating directions thereof; and fixing pins (22) fitted into the pin holes (21b) of the screw fixing member (21) and closely supported to the pin support grooves (23c) of the linear screw (23) in order to prevent an escape of the linear screw (23) in a right or left direction while the linear screw (23) is being rotated.
[Claim 5] The rotary table according to any one of the preceding claims 1 to 4, wherein the rotary plate (15) has a plurality of protrusions (15c) formed on the upper surface thereof at both sides of the slit (15b) .
[Claim 6]
The rotary table according to claim 5, further comprising: an outer frame; the gear box arranged inside the outer frame, supported at both sides on corresponding inside wall faces of the outer frame, and equipped with a plurality of gears therein; a reduction motor arranged under and geared to the gear box; a rotary plate rotatably geared to the gear box and coupled with a rotary shaft; and a power switch, a forward/backward switch and a rotating speed adjustment dial arranged on an outer face of the outer frame.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2006-0011737 | 2006-05-02 | ||
| KR2020060011737U KR200422131Y1 (en) | 2006-05-02 | 2006-05-02 | A rotary table which has a function of dividing plate |
| KR2020060013876U KR200423329Y1 (en) | 2006-05-24 | 2006-05-24 | A rotary table drilling machine |
| KR20-2006-0013876 | 2006-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007126283A1 true WO2007126283A1 (en) | 2007-11-08 |
Family
ID=38655748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2007/002121 WO2007126283A1 (en) | 2006-05-02 | 2007-04-30 | Rotary table having a function of the dividing plate |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2007126283A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014083017A2 (en) * | 2012-11-27 | 2014-06-05 | Magerl Feinmechanik Gmbh | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| TWI572437B (en) * | 2014-11-27 | 2017-03-01 | 楊啟明 | Quick-release device for quickly positioning a vice on a platform |
| CN106584383A (en) * | 2016-12-19 | 2017-04-26 | 重庆中奥离合器制造有限公司 | Clutch release bearing clamping device |
| CN111590344A (en) * | 2020-05-28 | 2020-08-28 | 芜湖市零一精密工具制造有限公司 | Supporting platform for cutter machining |
| CN114043157A (en) * | 2021-12-02 | 2022-02-15 | 苏州航菱微精密组件有限公司 | Adjustable clamping device and clamping method for welding large rack |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09323207A (en) * | 1996-05-31 | 1997-12-16 | Toshiba Mach Co Ltd | Work rotating lathe dog |
| KR20010047913A (en) * | 1999-11-24 | 2001-06-15 | 이계안 | Jig for fixing work piece |
| KR20050053061A (en) * | 2003-12-02 | 2005-06-08 | 현대자동차주식회사 | Turn table device |
-
2007
- 2007-04-30 WO PCT/KR2007/002121 patent/WO2007126283A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09323207A (en) * | 1996-05-31 | 1997-12-16 | Toshiba Mach Co Ltd | Work rotating lathe dog |
| KR20010047913A (en) * | 1999-11-24 | 2001-06-15 | 이계안 | Jig for fixing work piece |
| KR20050053061A (en) * | 2003-12-02 | 2005-06-08 | 현대자동차주식회사 | Turn table device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014083017A2 (en) * | 2012-11-27 | 2014-06-05 | Magerl Feinmechanik Gmbh | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| WO2014083017A3 (en) * | 2012-11-27 | 2014-09-12 | Magerl Feinmechanik Gmbh | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| CN104936742A (en) * | 2012-11-27 | 2015-09-23 | 马吉尔微力学有限公司 | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| EP3219437A1 (en) * | 2012-11-27 | 2017-09-20 | Magerl Feinmechanik GmbH | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| CN104936742B (en) * | 2012-11-27 | 2018-08-28 | 马吉尔微力学有限公司 | Work fixing device and for Work fixing device be equipped with workpiece method |
| US10160081B2 (en) | 2012-11-27 | 2018-12-25 | Magerl Feinmechanik Gmbh | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| US10953507B2 (en) | 2012-11-27 | 2021-03-23 | Magerl Feinmechanik Gmbh | Workpiece holder device and method for mounting a workpiece in a workpiece holding device |
| TWI572437B (en) * | 2014-11-27 | 2017-03-01 | 楊啟明 | Quick-release device for quickly positioning a vice on a platform |
| CN106584383A (en) * | 2016-12-19 | 2017-04-26 | 重庆中奥离合器制造有限公司 | Clutch release bearing clamping device |
| CN111590344A (en) * | 2020-05-28 | 2020-08-28 | 芜湖市零一精密工具制造有限公司 | Supporting platform for cutter machining |
| CN114043157A (en) * | 2021-12-02 | 2022-02-15 | 苏州航菱微精密组件有限公司 | Adjustable clamping device and clamping method for welding large rack |
| CN114043157B (en) * | 2021-12-02 | 2024-06-11 | 航菱微(泰州)科技有限公司 | Adjustable clamping device and clamping method for welding large-scale rack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20070114819A (en) | Automated chuck exchange using rotating turret | |
| WO2007126283A1 (en) | Rotary table having a function of the dividing plate | |
| JP2009534204A (en) | Power tools | |
| JP6146154B2 (en) | Bolt fastening method and bolt fastening device | |
| CN103465200B (en) | A kind of clamping device | |
| JP5019378B2 (en) | Cutting hole processing equipment | |
| KR20180003918A (en) | Tapping apparatus | |
| KR101496055B1 (en) | Apparatus for changing drill blade | |
| JPS5981005A (en) | Adjustable chuck driven by spindle | |
| JP2006305575A (en) | Apparatus for welding stud | |
| JP4485478B2 (en) | Parts supply device | |
| KR200249753Y1 (en) | Rotating Welding Device | |
| JP4339637B2 (en) | Eccentric chuck | |
| KR200423329Y1 (en) | A rotary table drilling machine | |
| JP2004314222A (en) | Clamping device | |
| KR200422131Y1 (en) | A rotary table which has a function of dividing plate | |
| JP4290450B2 (en) | Electric wrench | |
| JP2799233B2 (en) | Attaching and detaching device of cover feed turret in double winding machine | |
| JP2007319976A (en) | Centering machine | |
| CN220145306U (en) | Motor shaft steel blind hole drilling fixture | |
| CN213561005U (en) | Sliding table type drilling and tapping combined machine | |
| CN213224633U (en) | Prevent tapping machine of work piece skew | |
| JP3091519U (en) | Spiral coil insert electric insertion tool | |
| CN114682818B (en) | Drilling machine convenient to change cutter | |
| CN220944258U (en) | Drilling machine for producing and processing iron component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07746278 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 07746278 Country of ref document: EP Kind code of ref document: A1 |