WO2021214783A1 - Système et procédé de chargement et de déchargement automatiques dans des machines-outil à commande numérique - Google Patents

Système et procédé de chargement et de déchargement automatiques dans des machines-outil à commande numérique Download PDF

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Publication number
WO2021214783A1
WO2021214783A1 PCT/IN2021/050366 IN2021050366W WO2021214783A1 WO 2021214783 A1 WO2021214783 A1 WO 2021214783A1 IN 2021050366 W IN2021050366 W IN 2021050366W WO 2021214783 A1 WO2021214783 A1 WO 2021214783A1
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WO
WIPO (PCT)
Prior art keywords
spindle
job
raw
feed system
push feed
Prior art date
Application number
PCT/IN2021/050366
Other languages
English (en)
Inventor
Gaurav Sarup
Prashant Sarup
Siddhant Sarup
Original Assignee
SARUP Gaurav
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SARUP Gaurav filed Critical SARUP Gaurav
Publication of WO2021214783A1 publication Critical patent/WO2021214783A1/fr

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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
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
    • B23Q39/028—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of workholder per toolhead in operating position
    • 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
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/06—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of pushers
    • 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
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q2039/008—Machines of the lathe type

Definitions

  • the present invention is generally related to CNC machines. More particularly, the present invention is related to a method and system for automatic loading and unloading of jobs in CNC machines for saving idle time.
  • CNC machines are widely used for manufacturing parts or components, since these machines automate the manufacturing process by implementing computer generated design and directives. The machines need raw jobs to be loaded and finished jobs to be unloaded from them to continue the process without any interruptions.
  • Conventional methods for loading and unloading involve human operators for some CNC machines; while others involve robot or gantry systems for automate the loading and unloading process. Having human operators for loading systems are considered inefficient and also dangerous.
  • Conventional automatic loading and unloading systems include gantry loading systems which are compatible with CNC lathe machines. Such gantry systems come in various sizes with single or twin multiple axis gantry arms. In some of the systems, the arms are accessorized with a pneumatically operated gripper. These conventional auto- loading systems for CNC lathes have machine idle time during unloading of machined job from a work holding or a chuck, cleaning of work holding and loading of fresh jobs.
  • these auto-loading systems are robot and gantry based and machine doors in front or top needs to be opened and closed to allow entry of robot or gantry arm inside machine enclosure to remove machined component and load fresh job. This further increase machine idle time.
  • loading systems are also guarded with safety doors or light curtains that need to be opened whenever the gantry arms enter machine enclosures to load or unload a job.
  • a usual implementation of these loading systems includes the gantry arm/robot unloading a finished job, loading a new job, coming out of the door and dropping the finished job at a designated point. Adding the machine idle time in process further.
  • Such existing auto loading methods and systems use complex CNC controlled machines (Robot or Gantry).
  • Robot or Gantry The implementation of the machine doors to allow entry of the gantry arms into the machine enclosures, in turn, requires time and energy and also allows escape of a coolant mist when the door opens. This escaped coolant mist is a loss of money and also spreads dampness in the area around machine.
  • robot and gantry based auto-loading systems also find it hard to load shaft type components where more than half of the job has to be inside the work holding or the chuck area and only area to be machined lies outside the work holding or the chuck area. They also find it difficult to unload components of such shapes.
  • robot or gantry systems are expensive and add to complexity of entire system and chances of breakdown are more. [0009] Therefore, there exists a need for automatic loading and unloading systems in the CNC machines which eliminates machine idle time during loading/unloading, is efficient and suitable for shaft type components, is economical and reliable.
  • FIG. 1 illustrates a block diagram of an exemplary environment showing a double spindle CNC lathe machine employing an auto loading and unloading system of the present invention, in accordance with an embodiment of the present invention
  • FIG. 2 illustrates a flow chart showing a method employing the auto loading and unloading system in a CNC machine with double spindles, in accordance with an embodiment of the present invention
  • FIGs. 3-6 illustrates an exemplary environment showing a double spindle CNC lathe machine with auto loading and unloading system, in accordance with an embodiment of the present invention.
  • the present invention provides an automatic loading and unloading system and method to be employed in CNC machines. More particularly, the present invention provides an automatic loading and unloading system and method for multiple spindle CNC machines. In an embodiment, the CNC machine is a double spindle CNC lathe machine.
  • the auto loading and unloading system for the double spindle CNC machine provides automatic unloading of a machined job from one spindle using a movable part catcher and a pusher system which is installed at the rear of the spindle. As soon as the machined job is unloaded, the system auto loads a raw job at the same spindle using a stopper and the pusher system.
  • the system While at the one spindle, the system is unloading the machined job, at the other spindle, a slide or a saddle continues and finishes machining of a raw job at the other spindle. After finishing the machining at the other spindle, the saddle slides to the one spindle for starting the machining of the loaded raw job. This way, the system helps in eliminating machine idle time.
  • FIG. 1 illustrates a block diagram of an exemplary environment including a double spindle CNC lathe machine employing the auto loading and unloading system of the present invention, in accordance with an embodiment of the present invention.
  • the system 100 has a CNC lathe machine 102 that includes two spindles, a first spindle 104 and a second spindle 106. The two spindles of the machine 102 are facing opposite to each other axially, according to an embodiment.
  • each of the spindles, the first spindle 104 and the second spindle 106 has their separate smart push feed systems, namely first smart push feed system 108 and second smart push feed system 110 respectively. Further, each of the spindles, the first spindle 104 and the second spindle 106 has their separate chuck or work holding area and stoppers, namely first chuck 112 and first stopper 114; and second chuck 116 and second stopper 118, respectively.
  • the machine 102 comprises of a machine slide or a machine saddle 120 that moves between the first spindle 104 and second spindle 106 for machining or working on raw jobs.
  • the machine 102 further comprises of movable part catcher 122 for catching machined jobs from the first spindle 104 and second spindle 106.
  • the system includes one movable part catcher 122 that moves between the first spindle 104 and second spindle 106 for catching machined jobs from the first spindle 104 and second spindle 106.
  • the system includes two movable part catchers 122, one for each of the first spindle 104 and second spindle 106.
  • the smart push feed systems 108 and 110 are located at the rear of the spindles 104 and 106, such that they feed raw jobs from the rear of the spindles 104 and 106.
  • the smart push feed systems 108 and 110 may be located at any suitable position with respect to the spindles 104 and 106, respectively, such that they feed raw jobs to the spindles 104 and 106 appropriately and efficiently, without any hurdles, without deviating from the meaning and scope of the present invention.
  • the smart push feed systems 108 and 110 are located at the front of the spindles 104 and 106, such that they feed raw jobs from the front of the spindles 104 and 106, respectively.
  • the stoppers 114 and 118 are unlike conventional stoppers, and are mounted on heads of each of the spindles (104 and 106) and are independent mechanism mounted on each head of the spindles. Stoppers 114 and 114 help the smart push feed systems 108 and 110 for loading the raw jobs at the spindles 104 and 106, by navigating, supporting and stopping the position of the raw jobs to and at the chucks 112 and 116 or the work holdings of the spindles.
  • the CNC machine 102 may have other suitable in-feed system than the present smart push feed systems 108 and 110 which are able to feed raw jobs to the spindles 104 and 106, without deviating from the meaning and scope of the present invention.
  • FIG. 2 illustrates a flow chart showing a method employing the auto loading and unloading system in a CNC machine with double spindles, in accordance with an embodiment of the present invention.
  • the method 200 should be read and understood in conjunction with the auto loading system 100 explained in the FIG. 1 above, in accordance with an embodiment of the invention.
  • the method 200 may include at least one limitation of the auto loading system 100 explained in the FIG. 1 above, in accordance with an embodiment of the invention. Steps shown in the method 200 in the FIG. 2 may or may not follow a flow as shown in the flowchart in the FIG. 2. Thus, the flow of steps in the method 200 should not be restricted as shown in the FIG. 2.
  • the method 200 includes a step 202 where the first smart push feed system 108 feeds a raw job to the first spindle 104 to mount the raw job on the first chuck 112.
  • the first smart push feed system 108 feeds a raw job from the rear of the first spindle 104 to mount the raw job on the first chuck 112.
  • the first smart push feed system 108 pushes and loads the raw job against the first stopper 114 at the first spindle 104.
  • the first stopper 114 navigates, supports and stops the position of the raw job to and at the chuck 112 or the work holding of the first spindle 104.
  • the machine slide 120 moves to the first head of the first spindle 104 for machining of the raw job.
  • the steps 208-212 happens on the second spindle 106.
  • the second spindle 106 has finished working on a job to produce a finished job, at stage before step 208 at the second spindle 106.
  • the auto loading and unloading system 100 unloads a finished job from front of the second spindle 106.
  • the movable part catcher 122 moves to the second spindle 106 in an active position to catch the finished job.
  • the movable part catcher 122 may be roof mounted on the spindles to prevent chips getting into it or conventionally mounted.
  • the second smart push feed system 110 pushes the finished job from the second spindle 106 into the movable part catcher 122.
  • the second smart push feed system 110 pushes the finished job from the rear of the second spindle 106 into the movable part catcher 122.
  • the auto loading and unloading system 100 performs ejection of the finished job from the second spindle 106 while a raw job is being machined at the first spindle 104.
  • the system 100 unloads the raw job from the front of the spindles 104 and 106.
  • the second smart push feed system 110 feeds a raw job to the second spindle 106 to mount the raw job on the second chuck 116, at step 210.
  • the second smart push feed system 110 feeds a raw job from the rear of the second spindle 106 to mount the raw job on the second chuck 116.
  • the second smart push feed system 110 pushes and loads the raw job against the second stopper 118 at the second spindle 106.
  • the second stopper 118 navigates, supports and stops the position of the raw job at the second chuck 116 or the work holding of the second spindle 106.
  • the second stopper moves to a safe zone away from the second spindle 106.
  • the machine slide 120 moves to the second head of the second spindle 106 for machining of the raw job that is loaded at the step 210.
  • the auto loading and unloading system 100 follows the unloading steps of 208-212 similarly at the first spindle 104 to unload the finished job from front of the first spindle 104, using the part catcher 122 and the first smart push feed system 108.
  • FIGs. 3-6 illustrates an exemplary environment showing a double spindle CNC lathe machine with auto loading and unloading system, in accordance with an embodiment of the present invention.
  • FIGs. 3-6 are read and understood in conjunction with description of the FIGs. 1-2 explained above, while including at least one or more of the embodiments of the FIG.s 1-2 as described above.
  • FIGs. 3-6 only show an exemplary design of the autoloading system 100, and is not restricted to the design and shape as illustrated in the FIGs. 3-6.
  • FIGs. 3-6 should be read and understood in conjunction with the FIGs. 1-2, and may include at least one or more embodiments of the autoloading system 100 of the FIGs. 1-2.
  • FIG. 3-6 illustrates an exemplary environment showing a double spindle CNC lathe machine with auto loading and unloading system, in accordance with an embodiment of the present invention.
  • FIGs. 3-6 are read and understood in conjunction with description of the FIGs. 1-2 explained above, while including at least one or more of the embodiment
  • FIG. 3 shows an environment 300 including the CNC lathe machine 102.
  • the machine 102 includes the components as listed in Fig. 1.
  • the first smart push feed system 108 feeds a raw job 302 from the rear of the first spindle 104 to mount the raw job 302 on the first chuck 112.
  • the first smart push feed system 108 pushes and loads the raw job 302 against the first stopper 114 at the first spindle 104.
  • the first stopper 114 navigates, supports and stops the position of the raw job 302 at the chuck 112 or the work holding of the first spindle 104.
  • the machine slide 120 moves to the first head of the first spindle 104 for machining of the raw job 302. [0041] FIG.
  • the auto loading and unloading system 100 unloads a finished job 402 from the second chuck 114 of the second spindle 106.
  • the movable part catcher 122 moves to the second spindle 106 in an active position to catch the finished job 402.
  • the second smart push feed system 110 pushes the finished job 402 from the rear of the second spindle 106 into the movable part catcher 122.
  • the auto loading and unloading system 100 performs ejection of the finished job 402 from front of the second spindle 106 while a raw job is being machined at the first spindle 104.
  • FIG. 5 shows the CNC machine 102 in an exemplary environment 500, showing the operations at the second spindle 106.
  • the second smart push feed system 110 feeds a raw job 502 from the rear of the second spindle 106 to mount the raw job 502 on the second chuck 116.
  • the second smart push feed system 110 pushes and loads the raw job 502 against the second stopper 118 at the second spindle 106.
  • the second stopper 118 navigates, supports and stops the position of the raw job 502 at the second chuck 116 or the work holding of the second spindle 106. Afterwards, the second stopper 118 moves to a safe zone away from the second spindle 106.
  • FIG. 6 shows the CNC machine 102 in an exemplary environment 600, showing the unloading operations at the first spindle 104. While the raw job 502 is being machined at the second spindle 106, the machine 102 simultaneously performs unloading of a finished job 602 from the first spindle 104. Also, after machining ends on the first spindle 104, the slide 120 moves to the second head of the second spindle 106 for machining of the raw job 502 that is loaded at the second spindle 106 in the Fig. 5 above. [0044] The machine 102 simultaneously performs the unloading of the finished job 602 from the first spindle 104 in the same fashion as is described for the second spindle 106 in the Fig. 4 above, using the part catcher 122 and the first smart push feed system 108.
  • the present invention provides an auto loading and unloading system which eliminates or reduces the machine idle time greatly, and is simpler in design and functions faster than the conventional systems.
  • the present auto loading and unloading system also works efficiently with the variety of shapes, designs and sizes of the jobs, including and not limited to shaft type jobs, and is highly reliable for variously shaped and sized jobs.
  • the present auto loading and unloading system feeds the raw jobs from the rear of the spindles and not from front or top of the machine doors using robot or gantry arms for entering the machine enclosures to load/unload jobs, the present auto loading and unloading system further reduces the machine idle time.
  • the present auto loading and unloading system is also economical since it does not use expensive robot and gantry arms for loading unloading the jobs.

Abstract

La présente invention concerne un système et un procédé de chargement et de déchargement automatiques de machines-outils à commande numérique (CNC) à double broche. Le système permet le déchargement automatique d'une pièce usinée à partir d'une première broche à l'aide d'un dispositif de capture de pièces mobile et d'un système de poussée qui est installé à l'arrière de la première broche. Dès que pièce usinée est déchargée, le système charge automatiquement une pièce brute au niveau de la première broche à l'aide d'une butée et du système de poussée. Pendant qu'au niveau de la première broche, le système effectue le déchargement de la pièce usinée, au niveau de la seconde broche, une coulisse ou une selle poursuit et termine l'usinage d'une pièce brute simultanément. Après la fin de l'usinage au niveau de la seconde broche, la selle coulisse vers la première broche pour commencer l'usinage de la pièce brute chargée. De cette manière, le système aide à réduire ou à éliminer les temps mort de la machine.
PCT/IN2021/050366 2020-04-19 2021-04-13 Système et procédé de chargement et de déchargement automatiques dans des machines-outil à commande numérique WO2021214783A1 (fr)

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Application Number Priority Date Filing Date Title
IN202011016784 2020-04-19
IN202011016784 2020-04-19

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WO2021214783A1 true WO2021214783A1 (fr) 2021-10-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1711309B1 (fr) * 2004-05-07 2008-04-02 Ralf Prahler Tour presentant deux broches de travail mobiles
US8584559B2 (en) * 2007-09-10 2013-11-19 Samsys Gmbh Automatic universal workpiece feed and unloading device for machine tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1711309B1 (fr) * 2004-05-07 2008-04-02 Ralf Prahler Tour presentant deux broches de travail mobiles
US8584559B2 (en) * 2007-09-10 2013-11-19 Samsys Gmbh Automatic universal workpiece feed and unloading device for machine tool

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