US20180207729A1 - Automatic wheel rim positioning and clamping tool - Google Patents
Automatic wheel rim positioning and clamping tool Download PDFInfo
- Publication number
- US20180207729A1 US20180207729A1 US15/415,199 US201715415199A US2018207729A1 US 20180207729 A1 US20180207729 A1 US 20180207729A1 US 201715415199 A US201715415199 A US 201715415199A US 2018207729 A1 US2018207729 A1 US 2018207729A1
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- United States
- Prior art keywords
- wheel rim
- clamping
- positioning
- nozzle holder
- lateral
- 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.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16287—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially using fluid-pressure means to actuate the gripping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/001—Protection against entering of chips or dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
- B23B31/16275—Form of the jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/18—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in planes containing the axis of the chuck
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
- B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
- B23B31/302—Hydraulic equipment, e.g. pistons, valves, rotary joints
-
- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/006—Arrangements for observing, indicating or measuring on machine tools for indicating the presence of a work or tool in its holder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/003—Combinations of clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/006—Supporting devices for clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/061—Arrangements for positively actuating jaws with fluid drive
- B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/14—Clamps for work of special profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/16—Details, e.g. jaws, jaw attachments
- B25B5/163—Jaws or jaw attachments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/08—Automobile wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/24—Cooling or lubrication means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/26—Detection of clamping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/128—Sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
- B23B2270/28—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
- B23B2270/30—Chip guiding or removal
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/005—Devices for removing chips by blowing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/10—Expanding
- Y10T279/1021—Fluid-pressure actuator
- Y10T279/1033—Expanding jaws via mechanical connection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/12—Chucks or sockets with fluid-pressure actuator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/12—Chucks or sockets with fluid-pressure actuator
- Y10T279/1274—Radially reciprocating jaws
- Y10T279/1291—Fluid pressure moves jaws via mechanical connection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/18—Pivoted jaw
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/19—Radially reciprocating jaws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/29—More than one set of gripping means
Definitions
- the present invention relates to automobile technology and more particularly to an automatic wheel rim positioning and clamping apparatus for installation in a CNC Tilting Rotary Table to secure a wheel rim for processing.
- Such positioning and clamping apparatus has the functions of air leakage detection, wheel rim automatic positioning and clamping and automatic chip removal.
- CNC Computer Numerical Control
- clamping fixtures used in CNC machine tools for securing a wheel rim for processing still adopt a manual placement design.
- These clamping fixtures cannot be used with a robotic arm to achieve fully automated production.
- advanced designs of clamping fixtures that can be installed in a CNC machine tool for cutting a wheel rim, however, these advanced designs of clamping fixtures are quite complex in structure, resulting in a relatively higher production cost. Further, these advanced designs of clamping fixtures cannot perform other functions, such as automatic removal of cutting chips during the cutting process, thus affecting the feasibility of fully automated processing.
- the present invention has been accomplished under the circumstances in view. It is main object of the present invention to provide an automatic wheel rim positioning and clamping tool which employs an air leakage detection technique to rapidly detect the wheel rim position and clamping status.
- an automatic wheel rim positioning and clamping tool comprises a base, which comprises a bottom wall for mounting, a top bearing wall opposite to the bottom wall, a center portion in communication between the bottom wall and the top bearing wall, an upright post mounted on the top bearing wall of the base above the center portion, a lateral chip conveyor, which comprises an annular fluid nozzle holder fixedly mounted on the top bearing wall of the base around the upright post for guiding in a fluid for flushing away chips and a plurality of first lateral nozzles mounted on the periphery of the annular fluid nozzle holder for spraying out the fluid being guided into the annular fluid nozzle holder, a vertical hydraulic chuck, which is concentrically mounted on the upright post and affixed to the annular fluid nozzle holder, comprising a plurality of claw blocks equiangularly arranged on a top surface thereof and horizontally radially movable toward or away from the upright post, a positioning gripper, which comprises a plurality of grip
- FIG. 1 is a schematic drawing illustrating an automatic positioning and clamping tool in accordance with the present invention, as installed in a CNC Tilting Rotary Table.
- FIG. 2 is an oblique top view of the automatic positioning and clamping tool in accordance with the present invention.
- FIG. 3 is an exploded view of the automatic positioning and clamping tool in accordance with the present invention.
- FIG. 4 is a side sectional view of the automatic positioning and clamping tool in accordance with the present invention.
- FIG. 5 is a perspective view of one air leakage detection unit and one clamping device.
- FIG. 6 is a schematic drawing illustrating an operation status of the air leakage detection unit and the clamping device.
- FIG. 7 is a schematic drawing illustrating the automatic positioning and clamping tool holding a wheel rim for processing.
- an automatic positioning and clamping tool for wheel rim processing in accordance with the present invention is shown.
- the automatic positioning and clamping tool is adapted for mounting in a CNC Tilting Rotary Table 10 for positioning and clamping a wheel rim 20 , so that a cutting tool 30 of a CNC machine tool can be operated to process the wheel rim 20 .
- the wheel rim 20 is typically a truck wheel rim of 20 inches or more in diameter, but is not limited to a truck wheel rim.
- the automatic positioning and clamping tool comprises a base 1 , an upright post 2 , a lateral chip conveyor 3 , a vertical hydraulic chuck 4 , a positioning gripper 5 , a plurality of air leakage detection unit 6 , and a plurality of clamping devices 7 .
- the base 1 comprises a bottom wall 11 for mounting on the CNC Tilting Rotary Table 10 , a top bearing wall 12 opposite to the bottom wall 11 , and a center portion 13 in communication between the bottom wall 11 and the top bearing wall 12 .
- the base 1 is a flat plate member.
- the upright post 2 is mounted on the top bearing wall 12 of the base 1 above the center portion 13 .
- the upright post 2 can be a stepped column with a circular or polygonal cross section.
- the lateral chip conveyor 3 comprises an annular fluid nozzle holder 31 fixedly mounted on the top bearing wall 12 of the base 1 around the upright post 2 for guiding in a fluid that is a working fluid for flushing away chips, and a plurality of first lateral nozzles 32 mounted on the periphery of the annular fluid nozzle holder 31 .
- the first lateral nozzles 32 are adjustable spherical universal nozzles.
- the vertical hydraulic chuck 4 is concentrically mounted on the upright post 2 and affixed to the annular fluid nozzle holder 31 , comprising a plurality of claw blocks 42 equiangularly arranged on a top surface 41 thereof and horizontally radially movable by a hydraulic drive to move toward or away from the upright post 2 .
- the positioning gripper 5 is adapted for contacting and allocating the wheel rim 20 , comprising a plurality of gripper blocks 51 respectively fixedly mounted on the claw blocks 42 .
- Each gripper block 51 has a friction surface 52 located on one lateral side thereof and adapted for abutting against a bore wall of a center bore 201 of the wheel rim 20 .
- the air leakage detection units 6 are mounted on the top bearing wall 12 of the base 1 .
- Each air leakage detection unit 6 comprises a contact surface 61 for abutment against the wheel rim 20 , a gas flow sensor 63 mounted therein, and a first air hole 62 defined therein and having one end thereof extended to the contact surface 61 and an opposite end thereof connected to the gas flow sensor 63 .
- the clamping devices 7 are mounted on the top bearing wall 12 and spaced around the lateral chip conveyor 3 , and adapted for clamping a flange 202 of the wheel rim 20 .
- automatic positioning and clamping tool further comprises a plurality of top chip conveyors 8 .
- Each top chip conveyor 8 comprises a top fluid nozzle holder 81 mounted on the top surface 41 of the vertical hydraulic chuck 4 for guiding in a fluid, and at least one second lateral nozzle 82 mounted on one lateral side of the top fluid nozzle holder 81 for spraying the intake flow of a working fluid.
- the second lateral nozzle 82 can be an adjustable spherical universal nozzle.
- an annular shielding shell 9 is provided to surround the vertical hydraulic chuck 4 .
- the annular shielding shell 9 comprises a plurality of arched shell elements 91 tightly connected to one another, and a plurality of mounting holes 92 located on the arched shell elements 91 for accommodating the second lateral nozzles 82 of the top chip conveyors 8 , enabling the second lateral nozzles 82 to extend out of the annular shielding shell 9 for spraying a working fluid to flush away chips.
- the working fluid supplying structure is a hidden structure, comprising a plurality of first working fluid supply channel 14 located in the center portion 13 of the base 1 in communication between the bottom wall 11 and the top bearing wall 12 , a plurality of second working fluid supply channels 21 located in the upright post 2 in communication between one lateral wall and a top surface thereof for communication with the first working fluid supply channel 14 as well as for communication with the top fluid nozzle holder 81 of the top chip conveyor 8 and the annular fluid nozzle holder 31 of the lateral chip conveyor 3 , and a plurality of third working fluid supply channels 33 located in the annular fluid nozzle holder 3 with respective one ends thereof extended to the periphery thereof and respective opposite ends thereof disposed in communication with the first working fluid supply channels 14 or the second working fluid supply channels 21 .
- the first lateral nozzle 32 are mounted on the periphery of the annular fluid nozzle holder 31 within the respective other ends of the third working fluid supply channels 33 .
- the annular fluid nozzle holder 31 of the lateral chip conveyor 3 is configured to comprise a lower ring-shaped body 311 , an upper ring-shaped body 312 mounted at a top side of the lower ring-shaped body 311 , and a top ring-shaped cap 313 attached to a top side of the upper ring-shaped body 312 .
- the lower ring-shaped body 311 and the upper ring-shaped body 312 are configured to provide the aforesaid third working fluid supply channels 33 .
- the first lateral nozzles 32 are respectively mounted in the periphery of the lower ring-shaped body 311 and the periphery of the upper ring-shaped body 312 .
- the aforesaid vertical hydraulic chuck 4 comprises a chuck body 43 mounted on the upright post 2 and the annular fluid nozzle holder 31 , three sliders 44 equiangularly and slidably mounted on the chuck body 43 and drivable by a hydraulic drive (not shown) to move horizontally and radially toward the upright post 2 or away from the upright post 2 , and the aforesaid claw blocks 42 respectively fixedly mounted on the sliders 44 .
- the aforesaid positioning gripper 5 preferably comprises three said gripper blocks 51 . These three gripper blocks 51 are 120 -degree sector blocks. Thus, when the gripper blocks 51 are abutted against one another, the friction surfaces 52 of the gripper blocks 51 constitute a circular surface for butting against the bore wall of the center bore 201 of the wheel rim 20 .
- each air leakage detection unit 6 preferably comprises a support column 64 .
- the aforesaid contact surface 61 is located on a top end of the support column 64 for supporting the flange 202 of the wheel rim 20 .
- the aforesaid first air hole 62 is defined in the support column 64 and extended to an opposing bottom end of the support column 64 .
- the base 1 has a plurality of second air holes 15 defined therein and respectively disposed in communication with the first air holes 62 in the support columns 64 of the air leakage detection units 6 . Further, the second air holes 15 are respectively extended to the gas flow sensors 63 of the air leakage detection units 6 in the base 1 .
- the gas flow sensors 63 are controlled to supply a gas to the second air holes 15 and the first air holes 62 .
- the applied gas is prohibited from leaking out of the first air holes 62 .
- the aforesaid clamping devices 7 preferably each comprise an actuating cylinder 71 that can be a hydraulic cylinder or pneumatic cylinder having a piston rod 711 , a lever 72 having one end thereof pivotally connected to the piston rod 711 of the actuating cylinder 71 , and a clamping block 73 connected to an opposite end of the lever 72 and adapted for clamping on the flange 202 of the wheel rim 20 .
- the clamping block 73 has a clamping surface 731 facing toward the contact surface 61 of one respective air leakage detection unit 6 .
- the procedure comprises the steps of: (a) operate a robotic arm (not shown) to pick up the wheel rim 20 to be processed and then to attach the center bore 201 of the wheel rim 20 onto the positioning gripper 5 ; (b) control the vertical hydraulic chuck 4 to carry the gripper blocks 51 radially outwards and to force the friction surfaces 52 of the gripper blocks 51 into abutment against the bore wall of the center bore 201 of the wheel rim 20 ; (c) release the robotic arm from the wheel rim 20 and move the robotic arm out of the CNC machine tool; (d) control the vertical hydraulic chuck 4 to carry the gripper blocks 51 radially inwards toward the upright post 2 and then radially outwards, enabling the border edge of the wheel rim 20 to accurately abut against the contact surfaces 61 of the air leakage detection units 6 ; (e) operate the clamping devices 7 to drive the actuating cylinders 71 in
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Abstract
Description
- The present invention relates to automobile technology and more particularly to an automatic wheel rim positioning and clamping apparatus for installation in a CNC Tilting Rotary Table to secure a wheel rim for processing. Such positioning and clamping apparatus has the functions of air leakage detection, wheel rim automatic positioning and clamping and automatic chip removal.
- Regular automobile wheel rims or truck wheel rims must be processed with a cutting tool to form the desired wheel hub and spokes. Nowadays, Computer Numerical Control (“CNC”) machine tools are commonly used for processing wheel rims in automated production. However, the clamping fixtures used in CNC machine tools for securing a wheel rim for processing still adopt a manual placement design. These clamping fixtures cannot be used with a robotic arm to achieve fully automated production. There are advanced designs of clamping fixtures that can be installed in a CNC machine tool for cutting a wheel rim, however, these advanced designs of clamping fixtures are quite complex in structure, resulting in a relatively higher production cost. Further, these advanced designs of clamping fixtures cannot perform other functions, such as automatic removal of cutting chips during the cutting process, thus affecting the feasibility of fully automated processing.
- The present invention has been accomplished under the circumstances in view. It is main object of the present invention to provide an automatic wheel rim positioning and clamping tool which employs an air leakage detection technique to rapidly detect the wheel rim position and clamping status.
- It is another object of the present invention to provide an automatic wheel rim positioning and clamping tool which employs a vertical hydraulic chuck positioning technique and has multiple clamping devices arranged around the wheel rim to be processed, allowing automatic wheel rim positioning and clamping to implement a robotic arm and a CNC machine tool for automated production.
- It is still another object of the present invention to provide an automatic wheel rim positioning and clamping tool which employs a fluid flushing technique to flush away chips during processing so as to prevent the chips from interfering with the processing operation.
- It is still another object of the present invention to provide an automatic wheel rim positioning and clamping tool which has the characteristics of compact structure and low tool cost.
- To achieve these and other objects of the present invention, an automatic wheel rim positioning and clamping tool comprises a base, which comprises a bottom wall for mounting, a top bearing wall opposite to the bottom wall, a center portion in communication between the bottom wall and the top bearing wall, an upright post mounted on the top bearing wall of the base above the center portion, a lateral chip conveyor, which comprises an annular fluid nozzle holder fixedly mounted on the top bearing wall of the base around the upright post for guiding in a fluid for flushing away chips and a plurality of first lateral nozzles mounted on the periphery of the annular fluid nozzle holder for spraying out the fluid being guided into the annular fluid nozzle holder, a vertical hydraulic chuck, which is concentrically mounted on the upright post and affixed to the annular fluid nozzle holder, comprising a plurality of claw blocks equiangularly arranged on a top surface thereof and horizontally radially movable toward or away from the upright post, a positioning gripper, which comprises a plurality of gripper blocks respectively fixedly mounted on the claw blocks, each gripper block having a friction surface located on one lateral side thereof and adapted for abutting against a bore wall of a center bore of the wheel rim to be processed, a plurality of air leakage detection units, which are mounted on the top bearing wall of the base, each comprising a contact surface or abutment against the wheel rim to be processed, a gas flow sensor mounted therein and a first air hole having one end thereof extended to the contact surface and an opposite end thereof connected to the gas flow sensor, and a plurality of clamping devices mounted on the top bearing wall of the base and spaced around the lateral chip conveyor and adapted for clamping the wheel rim to be processed.
- Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of the structure.
-
FIG. 1 is a schematic drawing illustrating an automatic positioning and clamping tool in accordance with the present invention, as installed in a CNC Tilting Rotary Table. -
FIG. 2 is an oblique top view of the automatic positioning and clamping tool in accordance with the present invention. -
FIG. 3 is an exploded view of the automatic positioning and clamping tool in accordance with the present invention. -
FIG. 4 is a side sectional view of the automatic positioning and clamping tool in accordance with the present invention. -
FIG. 5 is a perspective view of one air leakage detection unit and one clamping device. -
FIG. 6 is a schematic drawing illustrating an operation status of the air leakage detection unit and the clamping device. -
FIG. 7 is a schematic drawing illustrating the automatic positioning and clamping tool holding a wheel rim for processing. - Referring to
FIG. 1 andFIG. 7 , an automatic positioning and clamping tool for wheel rim processing in accordance with the present invention is shown. The automatic positioning and clamping tool is adapted for mounting in a CNC Tilting Rotary Table 10 for positioning and clamping awheel rim 20, so that acutting tool 30 of a CNC machine tool can be operated to process thewheel rim 20. Thewheel rim 20 is typically a truck wheel rim of 20 inches or more in diameter, but is not limited to a truck wheel rim. - Referring to
FIG. 2 ,FIG. 3 andFIG. 5 , the automatic positioning and clamping tool comprises abase 1, anupright post 2, alateral chip conveyor 3, a verticalhydraulic chuck 4, apositioning gripper 5, a plurality of airleakage detection unit 6, and a plurality ofclamping devices 7. Thebase 1 comprises abottom wall 11 for mounting on the CNC Tilting Rotary Table 10, a top bearingwall 12 opposite to thebottom wall 11, and acenter portion 13 in communication between thebottom wall 11 and thetop bearing wall 12. Preferably, thebase 1 is a flat plate member. Theupright post 2 is mounted on thetop bearing wall 12 of thebase 1 above thecenter portion 13. Further, theupright post 2 can be a stepped column with a circular or polygonal cross section. Thelateral chip conveyor 3 comprises an annularfluid nozzle holder 31 fixedly mounted on thetop bearing wall 12 of thebase 1 around theupright post 2 for guiding in a fluid that is a working fluid for flushing away chips, and a plurality of firstlateral nozzles 32 mounted on the periphery of the annularfluid nozzle holder 31. Preferably, the firstlateral nozzles 32 are adjustable spherical universal nozzles. The verticalhydraulic chuck 4 is concentrically mounted on theupright post 2 and affixed to the annularfluid nozzle holder 31, comprising a plurality ofclaw blocks 42 equiangularly arranged on atop surface 41 thereof and horizontally radially movable by a hydraulic drive to move toward or away from theupright post 2. Thepositioning gripper 5 is adapted for contacting and allocating thewheel rim 20, comprising a plurality ofgripper blocks 51 respectively fixedly mounted on theclaw blocks 42. Eachgripper block 51 has afriction surface 52 located on one lateral side thereof and adapted for abutting against a bore wall of acenter bore 201 of thewheel rim 20. Thus, by means of moving theclaw blocks 42 of the verticalhydraulic chuck 4 to carry therespective gripper blocks 51 horizontally, thefriction surfaces 52 of thegripper blocks 51 can be forced into abutment against the bore wall of thecenter bore 201 of thewheel rim 20 to allocate thewheel rim 20. The airleakage detection units 6 are mounted on thetop bearing wall 12 of thebase 1. Each airleakage detection unit 6 comprises acontact surface 61 for abutment against thewheel rim 20, agas flow sensor 63 mounted therein, and afirst air hole 62 defined therein and having one end thereof extended to thecontact surface 61 and an opposite end thereof connected to thegas flow sensor 63. Theclamping devices 7 are mounted on thetop bearing wall 12 and spaced around thelateral chip conveyor 3, and adapted for clamping aflange 202 of thewheel rim 20. - Referring to
FIG. 4 andFIG. 3 again, automatic positioning and clamping tool according to the invention further comprises a plurality oftop chip conveyors 8. Eachtop chip conveyor 8 comprises a topfluid nozzle holder 81 mounted on thetop surface 41 of the verticalhydraulic chuck 4 for guiding in a fluid, and at least one secondlateral nozzle 82 mounted on one lateral side of the topfluid nozzle holder 81 for spraying the intake flow of a working fluid. The secondlateral nozzle 82 can be an adjustable spherical universal nozzle. Further, anannular shielding shell 9 is provided to surround the verticalhydraulic chuck 4. Theannular shielding shell 9 comprises a plurality ofarched shell elements 91 tightly connected to one another, and a plurality ofmounting holes 92 located on thearched shell elements 91 for accommodating the secondlateral nozzles 82 of thetop chip conveyors 8, enabling the secondlateral nozzles 82 to extend out of theannular shielding shell 9 for spraying a working fluid to flush away chips. - Referring to
FIG. 4 again, the automatic positioning and clamping tool according to the invention uses the aforesaid firstlateral nozzles 32 and secondlateral nozzles 82 to spray a working fluid for flushing away chips and dust. The working fluid supplying structure is a hidden structure, comprising a plurality of first workingfluid supply channel 14 located in thecenter portion 13 of thebase 1 in communication between thebottom wall 11 and thetop bearing wall 12, a plurality of second workingfluid supply channels 21 located in theupright post 2 in communication between one lateral wall and a top surface thereof for communication with the first workingfluid supply channel 14 as well as for communication with the topfluid nozzle holder 81 of thetop chip conveyor 8 and the annularfluid nozzle holder 31 of thelateral chip conveyor 3, and a plurality of third workingfluid supply channels 33 located in the annularfluid nozzle holder 3 with respective one ends thereof extended to the periphery thereof and respective opposite ends thereof disposed in communication with the first workingfluid supply channels 14 or the second workingfluid supply channels 21. The firstlateral nozzle 32 are mounted on the periphery of the annularfluid nozzle holder 31 within the respective other ends of the third workingfluid supply channels 33. In order to facilitate the implementation of the third workingfluid supply channel 33, the annularfluid nozzle holder 31 of thelateral chip conveyor 3 is configured to comprise a lower ring-shaped body 311, an upper ring-shaped body 312 mounted at a top side of the lower ring-shaped body 311, and a top ring-shaped cap 313 attached to a top side of the upper ring-shaped body 312. The lower ring-shaped body 311 and the upper ring-shaped body 312 are configured to provide the aforesaid third workingfluid supply channels 33. The firstlateral nozzles 32 are respectively mounted in the periphery of the lower ring-shaped body 311 and the periphery of the upper ring-shaped body 312. - Referring to
FIGS. 3 and 4 again, the aforesaid verticalhydraulic chuck 4 comprises achuck body 43 mounted on theupright post 2 and the annularfluid nozzle holder 31, threesliders 44 equiangularly and slidably mounted on thechuck body 43 and drivable by a hydraulic drive (not shown) to move horizontally and radially toward theupright post 2 or away from theupright post 2, and theaforesaid claw blocks 42 respectively fixedly mounted on thesliders 44. Theaforesaid positioning gripper 5 preferably comprises three saidgripper blocks 51. These threegripper blocks 51 are 120-degree sector blocks. Thus, when thegripper blocks 51 are abutted against one another, thefriction surfaces 52 of thegripper blocks 51 constitute a circular surface for butting against the bore wall of the center bore 201 of thewheel rim 20. - Referring to
FIG. 6 andFIG. 5 again, each airleakage detection unit 6 preferably comprises asupport column 64. Theaforesaid contact surface 61 is located on a top end of thesupport column 64 for supporting theflange 202 of thewheel rim 20. The aforesaidfirst air hole 62 is defined in thesupport column 64 and extended to an opposing bottom end of thesupport column 64. Thebase 1 has a plurality ofsecond air holes 15 defined therein and respectively disposed in communication with thefirst air holes 62 in thesupport columns 64 of the airleakage detection units 6. Further, thesecond air holes 15 are respectively extended to thegas flow sensors 63 of the airleakage detection units 6 in thebase 1. Thus, when thewheel rim 20 is placed on thecontact surfaces 61 of thesupport columns 64 of the airleakage detection units 6, theclamping devices 7 and thepositioning gripper 5 at the verticalhydraulic chuck 4 are driven to secure thewheel rim 20 in position, thegas flow sensors 63 are controlled to supply a gas to thesecond air holes 15 and thefirst air holes 62. At this time, if the border edge of thewheel rim 20 is accurately abutted against the contact surfaces 61 of thesupport column 64 of the airleakage detection units 6 in an airtight manner, the applied gas is prohibited from leaking out of the first air holes 62. On the contrary, if the border edge of thewheel rim 20 is not accurately abutted against the contact surfaces 61 of thesupport column 64 of the airleakage detection units 6 in an airtight manner, the applied gas will leak out and will be detected by thegas flow sensors 63, and thegas flow sensors 63 will then provide a signal to an alarm (not shown), avoiding damage to the processing machine due to processing size errors or inaccurate clamping. - Referring to
FIGS. 5 and 6 again, theaforesaid clamping devices 7 preferably each comprise anactuating cylinder 71 that can be a hydraulic cylinder or pneumatic cylinder having apiston rod 711, alever 72 having one end thereof pivotally connected to thepiston rod 711 of theactuating cylinder 71, and aclamping block 73 connected to an opposite end of thelever 72 and adapted for clamping on theflange 202 of thewheel rim 20. The clampingblock 73 has aclamping surface 731 facing toward thecontact surface 61 of one respective airleakage detection unit 6. - When using the automatic positioning and clamping tool to secure a wheel rim 20 for processing, as illustrated in
FIG. 7 , the procedure comprises the steps of: (a) operate a robotic arm (not shown) to pick up the wheel rim 20 to be processed and then to attach the center bore 201 of the wheel rim 20 onto the positioning gripper 5; (b) control the vertical hydraulic chuck 4 to carry the gripper blocks 51 radially outwards and to force the friction surfaces 52 of the gripper blocks 51 into abutment against the bore wall of the center bore 201 of the wheel rim 20; (c) release the robotic arm from the wheel rim 20 and move the robotic arm out of the CNC machine tool; (d) control the vertical hydraulic chuck 4 to carry the gripper blocks 51 radially inwards toward the upright post 2 and then radially outwards, enabling the border edge of the wheel rim 20 to accurately abut against the contact surfaces 61 of the air leakage detection units 6; (e) operate the clamping devices 7 to drive the actuating cylinders 71 in moving the respective levers 72, causing the respective levers 72 to force the respective clamping blocks 73 downwardly onto the flange 202 of the wheel rim 20; (f) measure the size of the wheel rim 20, and then control the air leakage detection units 6 to supply a gas to the first air holes 62 so as to detect whether or not the border edge of the wheel rim 20 has been smoothly and accurately abutted against the contact surfaces 61 of the support columns 64. If a gas leakage is detected at this time, return to step (d). On the contrary, if no gas leakage is detected, start operating thecutting tool 30 of the CNC machine tool to process thewheel rim 20. - Further, as illustrated in
FIG. 7 , when operating thecutting tool 30 to process thewheel rim 20, keep spraying the working fluid through the firstlateral nozzles 32 and the secondlateral nozzles 82 to flush chips away from thewheel rim 20 onto thebase 1. Since thewheel rim 20 is raised by thesupport columns 64, chips can be washed away from the gap between thewheel rim 20 and thebase 1, preventing the chips from interfering with the processing operation.
Claims (9)
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US15/415,199 US10029314B1 (en) | 2017-01-25 | 2017-01-25 | Automatic wheel rim positioning and clamping tool |
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CN110434363A (en) * | 2019-09-20 | 2019-11-12 | 咸阳圣亚机电设备有限公司 | End face positions workpiece holding structure and detection method |
JP2020093309A (en) * | 2018-12-10 | 2020-06-18 | ファナック株式会社 | Washing device, washing method, and machine tool |
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CN110434363A (en) * | 2019-09-20 | 2019-11-12 | 咸阳圣亚机电设备有限公司 | End face positions workpiece holding structure and detection method |
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