JP4930714B2 - Work delivery device for horizontal machining center - Google Patents

Description

  The present invention relates to a workpiece dispensing apparatus for a horizontal machining center that dispenses a workpiece at a machining position after machining by a horizontal machining center to a dispensing position.

  In Patent Document 1, a work gripping tool configured such that a rotary shaft pivotally supported on a casing is detachable from a taper hole of a spindle of a machine tool is stored in a tool magazine, and the casing of the work gripping tool is provided on the rotary shaft. A pair of parallel rack members meshing with the pinion are slidably provided, gripping members are respectively provided at the protruding ends on the opposite sides of the rack members, and the work gripping tool is mounted on the spindle, and the spindle is rotated. Opening and closing operation of the gripping member, gripping the workpiece at the machining position with the gripping member, and then moving the spindle (moving column) of the machine tool left and right to convey the workpiece to a predetermined position on the side of the machining position. Is disclosed.

  In Patent Document 2, as in Patent Document 1, a work gripping tool configured such that a rotating shaft pivotally supported on a casing is detachable from a taper hole of a spindle of a machine tool is stored in a tool magazine, and the work gripping tool is stored in the tool magazine. A screw part is provided at the tip of the rotary shaft, and an opening / closing member that is screwed to the screw part of the rotary shaft is provided in the casing so as to be slidable in the axial direction of the rotary shaft. With the fitting protrusion fitted in the opening / closing groove of the opening / closing member and the work gripping tool mounted on the spindle, the gripping member was opened and closed by rotating the spindle, and the workpiece at the processing position was gripped by the gripping member. Thereafter, there is disclosed a workpiece dispensing apparatus in which a spindle (moving column) of a machine tool is moved left and right to convey a workpiece to a predetermined position on the side of the machining position.

In Patent Document 3, a holder is housed in a tool magazine of a machining center whose main shaft is movable in the X, Y, and Z axis directions, and a cylinder that opens and closes the grip portion with a pressure fluid such as cutting oil is provided in the holder. With the holder attached to the spindle, supply and discharge the pressure fluid to the cylinder to open and close the holder, grip the workpiece at the machining position with the holder, and then move the spindle of the machine tool to move the workpiece. There has been disclosed a workpiece dispensing apparatus which is adapted to be conveyed to an unloading path on the side of the machining position.
JP 2003-181736 A JP 2003-231034 A JP 2004-42152 A

  In the workpiece dispensing apparatuses described in Patent Documents 1 to 3, since the movement area of the spindle of a machine tool such as a machining center is set to an area where the workpiece is processed with the tool of the spindle, a workpiece gripping tool or a holder mounted on the spindle Thus, there is a problem that the payout position at which the work is gripped and discharged is limited to the side of the machining position, and the work cannot be directly delivered to the payout position in front of the machining position. For this reason, when it is desired to pay the workpiece forward to the workpiece machining position, as described in Patent Document 3, a workpiece carrying tool or holder is provided on the side of the workpiece machining position with a carry-out path for conveying the workpiece forward. After the workpiece gripped by the above is discharged to the unloading path on the side of the machining position, the workpiece is taken out to the front of the machining position by the unloading path. However, in the apparatus in which the unloading path is separately provided as described above, the structure of the apparatus becomes complicated, and the work removal becomes unstable, causing problems when the work is transferred to the next process. In addition, since the workpiece dispensing apparatus disclosed in Patent Documents 1 to 3 grips and transports a workpiece with a gripping member, the configuration of workpiece gripping tools and holders is complicated and expensive. The configuration of the gripping member of the tool or holder is specified by the shape and dimensions of the workpiece to be gripped, and it is necessary to prepare various workpiece gripping tools and holders according to the type of workpiece, which increases the total cost. is there.

  An object of the present invention is to provide a workpiece dispensing device for a horizontal machining center that can be used for dispensing workpieces of various shapes and can be manufactured at a low cost with a simple configuration.

In order to solve the above-described problems, the present invention provides a spindle support body that is rotatably supported by rotating the spindle, and a tool magazine that can store a replacement tool attached to the spindle, and a spindle and comprising a tool interchangeable tool changer with the tool magazine, affects the tool attached to the spindle, vertical, payout position in moved horizontal machining center which is adapted to machine the workpiece, a machined workpiece back and forth A workpiece dispensing device for storing the dispensing tool in a tool magazine so as to be exchangeable with the spindle,
A casing that is long in the axial direction, a rotating body that is rotatably supported on the base side of the casing, a feed shaft that is fixed to the axial center of the rotating body and protrudes toward the front end side of the casing, and a non-rotating state in the casing And a nut member which is provided so as not to move relatively in the axial direction on the base side of the extrusion member and is screwed to the feed shaft. A detachable fitting part and an engaging part that can be engaged with the spindle support body in the casing, respectively , to constitute a dispensing tool,
The casing is formed into a cylindrical shape that is long in the axial direction, and a cylindrical push-out member whose tip is closed in the casing is provided so as to be movable in the axial direction in a non-rotating state, and a nut member is fixed to the base side of the push-out member Then, the feed shaft and the nut member are housed in the closed space in the extrusion member, and a replaceable work contact member is provided at the tip of the extrusion member,
The feed shaft is rotated integrally with the rotating body by the rotation of the main shaft, the nut member and the push member are moved forward along the feed shaft by the non-rotating casing and the push member, and the workpiece contact member moves the work in the processing position. It pushes and pays out to a payout position (Claim 1).

In the invention of the present application, when the fitting portion is attached to the attachment hole of the main shaft, the engagement portion is fitted into the engagement hole of the main shaft support so that the casing is prevented from rotating. A sliding key is provided inside, a sliding recess is formed in a sliding portion on the outer periphery of the pushing member, and the pushing member is in a non-rotating state by fitting the sliding recess with the sliding key ( Claim 2).
The invention of the present application is characterized in that the rotating body is configured to rotate by a rigid tap cycle function of a spindle provided in the horizontal machining center, and the workpiece discharge is completed in one cycle. ).

The present invention includes a casing that is long in the axial direction, a rotating body that is rotatably supported on the base side of the casing, a feed shaft that is fixed to the axial center of the rotating body and protrudes toward the front end side of the casing, and a casing An axially long pushing member provided so as to be movable in the axial direction in a non-rotating state, and a nut member provided so as not to move relative to the axial direction on the base side of the pushing member and screwed to the feed shaft, A rotary tool is provided with a fitting part that can be attached to and detached from the main shaft, and an engaging part that can be engaged with the main shaft support body is provided on the casing to constitute a dispensing tool,
The casing is formed into a cylindrical shape that is long in the axial direction, and a cylindrical push-out member whose tip is closed in the casing is provided so as to be movable in the axial direction in a non-rotating state, and a nut member is fixed to the base side of the push-out member Then, the feed shaft and the nut member are housed in the closed space in the extrusion member, and a replaceable work contact member is provided at the tip of the extrusion member,
The feed shaft is rotated integrally with the rotating body by the rotation of the main shaft, the nut member and the push member are moved forward along the feed shaft by the non-rotating casing and the push member, and the workpiece contact member moves the work in the processing position. Since it pushes and pays out to the payout position, the payout tool stored in the tool magazine is attached to the main shaft, and the pushing member of the payout tool is advanced by rotating the main shaft and the main shaft is advanced, so that the workpiece at the processing position is moved by the push member. It is possible to pay by largely pushing and moving to a payout position in front of the machining position. In addition, since the payout tool stored in the tool magazine is mounted on the spindle, the pushing member of the payout tool is advanced by the rotation of the spindle and the spindle is advanced so that the workpiece is paid out. A dedicated installation space can be dispensed with, and it can be carried out easily and quickly in an existing machining center. Also, since the pushing member of the dispensing tool is advanced and the workpiece is pushed and moved by the pushing member, the workpiece can be easily dispensed with the same dispensing tool even when the shape of the workpiece varies. , Manufacturing costs can be reduced.

Further, the present invention provides a casing having a cylindrical shape elongated in the axial direction, and a cylindrical pushing member whose tip is closed in the casing is provided so as to be movable in the axial direction in a non-rotating state. Since the nut member is fixed to the side and the work contact member is provided at the tip of the extruding member, the feed shaft and the nut member can be stored in the closed space inside the extruding member. Etc. can be prevented and adhesion can be ensured over a long period of time.
In addition, the present invention is configured to rotate the rotating body by the rigid tap cycle function of the spindle of the horizontal machining center, and completes the discharge of the workpiece in one cycle. Therefore, without adding a new drive source, The workpiece can be easily and quickly delivered to the front of the machining position at low cost.

  Next, an embodiment of the present invention shown in the drawings will be described. 1 and 2 are side views of a quill type horizontal machining center 1. FIG. 1 shows a state in which a workpiece W located at a machining position P is being machined, and FIG. 2 shows a workpiece after machining. A state in which W is paid out from the machining position P to the dispensing position Q in front of the machining position P is shown. The quill-type horizontal machining center 1 is provided on a bed 2 so as to be movable in the left-right direction (X-axis), and is provided on the movable column 3 so as to be movable in the vertical direction (Y-axis). A saddle 5 and a quill 7 exemplified as a spindle support body provided on the saddle so as to be movable in the front-rear direction (Z-axis) in a horizontal posture are provided. A main shaft 9 is rotatably supported on the quill 7, and a mounting hole 11 (a taper hole is shown in the drawing) for mounting the tool 10 in a replaceable manner is provided at the tip of the main shaft 9. The moving column 3 is moved left and right by a feed shaft 13 that is rotated forward and backward by a left and right moving motor (not shown), the saddle 5 is moved up and down by a feed shaft 16 that is rotated forward and reverse by a lifting motor 15, and the quill 7 is moved back and forth. It is moved back and forth by a feed shaft (not shown) that is rotated forward and backward by the motor 18. The main shaft 9 is rotated forward and backward by a main shaft motor 20 provided at the rear end of the quill 7.

  Above the moving column 3, a support frame 23 in the left-right direction is fixedly arranged by a plurality of columns 21 erected from the bed 2, and a tool magazine 25 is installed on the support frame 23. In the tool magazine 25, a disk-shaped tool holding plate 28 is provided on a rotating shaft 27 rotated by an indexing motor 26, and a number of holding portions 29 are provided on the outer periphery of the tool holding plate 28. Various tools 10 are hold | maintained at the holding | maintenance part 29 of the tool holding plate 28 so that replacement | exchange is possible. The tool changer 30 for exchanging the tool 10 held by the holding portion 29 of the tool holding plate 28 and the tool 10 attached to the attachment hole 11 of the spindle 9 is attached to the spindle 9 by raising the saddle 5. The tool 10 mounted in the hole 11 is directly mounted on the holding portion 29 at the lowermost position of the tool holding plate 28, and then the quill 7 is retracted and the tool 10 is extracted from the mounting hole 11 of the main shaft 9. The mounting hole 11 is positioned behind the tool 10 held by the holding portion 29 at the lowermost position of the tool holding plate 28, and then the quill 7 is advanced to mount the tool 10 in the mounting hole 11 of the spindle 9. Then, when the saddle 5 is lowered, the tool 10 is removed from the holding portion 29 at the lowermost position of the tool holding plate 28 to change the tool. The tool magazine 25 may be one using a chain or another tool magazine using a guide groove. The tool changer 30 may be a tool changer using an exchange arm having a tool holding part at both ends.

  On the bed 2, a jig 32 for fixing a workpiece is installed in the processing area. The jig 32 includes a guide member 34 that can be moved up and down at the processing position P in the jig main body 33. When the guide member 34 is raised, a workpiece W is supplied onto the guide member 34 from the front by a hand or a robot, or the workpiece W is next. The workpiece W on the guide member 34 is clamped or unclamped to the jig body 33 by a clamp device (not shown) while the guide member 34 is lowered. A placement table 36 on which the workpiece W can be placed is provided at the dispensing position Q in front of the machining area of the horizontal machining center 1. The upper surface of the mounting table 36 is set at the same height as the upper surface of the guide member 34 in the raised state, and a slight gap is provided with respect to the guide member 34 in the raised state across the movement locus of the open / close door 38. Are provided continuously. In addition, instead of the placement table 36, a transfer conveyor or a lifting table on which the workpiece W can be placed may be placed at the payout position Q.

Next, the workpiece dispensing apparatus 40 for dispensing the workpiece W at the processed machining position P to the dispensing position Q in the quill-type horizontal machining center 1 will be described. The workpiece dispensing apparatus 40 includes a dispensing tool 42 shown in FIGS. The payout tool 42 includes a cylindrical casing 43 that is long in the axial direction, a rotating body 46 that is rotatably supported on the base side of the casing 43 via a bearing 44, and a casing 46 on the tip side of the casing of the rotating body 46. A feed shaft 47 that is fixed to the shaft center and protrudes toward the distal end side of the casing 43, and an axis line that is provided in the casing 43 so as to be movable in the axial direction in a non-rotating state that is locked by a sliding key 48. A cylindrical extruding member 50 that is long in the direction and a nut member 52 that is fixed to the base of the extruding member 50 with a screw 51 so as not to move relative to the axial direction. The nut member 52 is screwed to the feed shaft 47. The extruding member 50 is slidably fitted in an opening hole 43a formed on the front end side of the casing 43, and the front end is closed so that chips and dust do not enter the inside of the extruding member 50. is there. A workpiece contact member 55 corresponding to various workpieces W is attached to the distal end portion of the extrusion member 50 so as to be replaceable. However, the workpiece contact member 55 may be provided integrally with the extrusion member 50. On the outer periphery of the pushing member 50, a hook-shaped sliding portion 50a that can slide the inner surface of the casing 43 is formed at the end of the base portion, and a sliding key 48 fitted to the sliding key 48 is formed on the sliding portion 50a. A moving recess 50b is formed.

The rotating body 46 protrudes rearward from the casing 43, and the protruding portion is mounted in the mounting hole 11 of the spindle 9 and the gripping portion 46 a to be gripped by the holding portion 29 of the tool magazine 25, similar to the general tool 10. A tapered portion 46b exemplified as the fitting portion to be fitted and a pull stud 46c to be drawn by a pull rod (not shown) in the main shaft 9 are formed. A support arm 56 projects from the outer periphery of the base portion side of the casing 43, and a detent pin 57 exemplified as an engaging portion is fixed to the support arm 56 so as to protrude rearward. The rotation prevention pin 57 is fitted in an engagement hole (not shown) provided on the tip surface of the quill 7 so as to prevent the casing 43 from rotating about the axis.
During the workpiece machining, the payout tool 42 is held by the holding portion 29 of the tool holding plate 28 of the tool magazine 25 and is stored in the tool magazine 25 in the same manner as the replacement tool 10.
In addition, although the figure shows the taper part 46b provided with the pull stud 46c as the fitting part to be installed in the mounting hole 11 of the main shaft 9, the mounting hole 11 of the main shaft 9 is a two-sided restraint that does not include a pull stud. You may comprise by a fitting part. In that case, the mounting hole 11 of the main shaft 9 is configured to support two-surface restraint so that a two-surface restraint tool and a two-surface restraint payout tool can be attached.

In the quill-type horizontal machining center 1 as described above, the moving column 3 is moved left and right, the saddle 5 is moved up and down, and the quill 7 is moved back and forth, so that the main shaft 9 is moved left and right, up and down, and forward and backward according to the control program. The workpiece W at the machining position P can be machined by the tool 10 mounted on the spindle 9. The tool 10 mounted on the spindle 9 is automatically replaced with another tool 10 stored in the tool magazine 25 in accordance with the control program, and a series of machining is performed on the workpiece W. When processing the workpiece W, the open / close door 38 is closed.
When machining of the workpiece W is completed and the machined workpiece W is dispensed from the machining position P to the dispensing position Q, the tool 10 mounted on the spindle 9 is automatically replaced with the dispensing tool 42 stored in the tool magazine 25. Is done. In this automatic exchange, the main shaft 9 is moved three-dimensionally left and right, up and down, and front and rear, the tool 10 of the main shaft 9 is gripped by the holding portion 29 at the lowermost end of the tool magazine 25, and then the main shaft 9 is retracted. Then, the tool 10 is detached from the tool magazine 25, the tool holding plate 28 of the tool magazine 25 is rotated, the dispensing tool 42 is indexed and moved to the exchange position at the lowermost end, and then the main shaft 9 is advanced to attach the mounting hole of the main shaft 9. Is attached to the taper portion 46b of the dispensing tool 42, and the rotation stop pin 57 of the dispensing tool 42 is fitted into the engagement hole of the quill 7, and then the spindle 9 is lowered to attach the dispensing tool 42 to the holding portion of the tool magazine 25. This is done by separating from 29. The automatic exchange between the tool 10 and the dispensing tool 42 can be performed in the same manner as the automatic exchange between the tools 10. At the processing position P, after the processed workpiece W is unclamped from the jig 32, the guide member 34 is lifted and moved above the jig 32. The open / close door 38 is opened for discharging the workpiece W and supplying the workpiece W.

  Next, the spindle 9 is moved three-dimensionally left and right, up and down, and back and forth, and the workpiece abutting member 55 of the pushing member 50 of the dispensing tool 42 attached to the spindle 9 is moved to the rear surface of the workpiece W at the machining position P (on the machining area). Close to the back side). In this case, similarly to the case where the workpiece W is machined with the tool 10 of the spindle 9, the payout tool 42 of the spindle 9 can be easily moved to the optimum position according to the position and shape of the workpiece W. In this state, the main shaft 9 is rotated by the rigid tap cycle function of the main shaft 9 provided in the horizontal machining center 1. Although the feed shaft 47 rotates integrally by the forward rotation of the main shaft 9 (for example, the right rotation as viewed from the right side in FIG. 3), the casing 43 and the pushing member 50 are prevented from rotating and do not rotate. 47 is moved forward (the tip side of the feed shaft 47). The pushing member 50 is moved forward by the movement of the nut member 52, the work contact member 55 of the pushing member 50 is brought into contact with the work W at the processing position P, and the work W is pushed and moved to the payout position Q. Payout to payout position Q. In this case, when the work contact member 55 of the push-out member 50 is moved to the most advanced end, the work contact member 55 is set to be positioned slightly in front of the movement locus of the open / close door 38 and is opened and closed for some reason. Even if the door 38 is closed, it does not interfere with the workpiece contact member 55. However, the workpiece contact member 55 may advance beyond the processing region beyond the movement locus of the open / close door 38. Since the main shaft 9 is reversely rotated immediately after being forwardly rotated by the rigid tap cycle function, the feed shaft 47 is reversely rotated together. As a result, the pushing member 50 moved to the forward end is immediately moved backward. Return to original position. As described above, the payout of the workpiece W can be completed quickly in one cycle of the rigid tap cycle function of the main shaft 9.

  Thereafter, the payout tool 42 is automatically exchanged with the tool 10 for processing the next workpiece W by the three-dimensional movement of the spindle 9 and stored in the tool magazine 25. Further, when the processed workpiece W is delivered to the delivery position Q, the completion of processing of the workpiece W in the horizontal machining center 1 is confirmed directly or indirectly by the delivery, and the next workpiece W is manually or robotically. Then, the workpiece W is supplied and fixed at the machining position P, and the workpiece W is machined again.

In the workpiece dispensing operation, when the workpiece W at the machining position P is to be dispensed, after the dispensing tool 42 is brought close to the rear surface of the workpiece W at the machining position P, the spindle 9 is rotated to advance the extrusion member 50. The workpiece W is discharged, but before bringing the discharging tool 42 close to the rear surface of the workpiece W at the processing position P, first, the main shaft 9 is rotated forward in the state where the quill 7 is finally retracted, and the extrusion member In this state, the workpiece abutting member 55 of the dispensing tool 42 is brought close to and opposed to the rear surface of the workpiece W at the machining position P, and then the quill 7 is advanced to eject the workpiece W forward. May be. Alternatively, a plurality of payout tools 42 having different shapes of the workpiece contact members 55 may be stored in the tool magazine 25, and the optimal payout tool 42 for paying out the workpiece W may be selected and used.
In addition, the figure shows a case where the quill type horizontal machining center in which a quill is provided in a saddle provided on the movable column so as to be movable back and forth is shown, but the spindle head is moved up and down on a movable column movable in the front and rear and left and right directions. The present invention can be similarly applied to a column moving type horizontal machining center that can be provided, in which case the moving column moves back and forth to move the main shaft back and forth instead of moving the quill back and forth.

It is a side view of a machining center provided with the tool dispensing apparatus of the present invention. It is a side view of the machining center which shows the operating state of a tool dispensing apparatus. It is sectional drawing which shows the delivery tool of a tool delivery apparatus. FIG. 4 is a sectional view taken along line IV-IV of the dispensing tool of FIG. 3.

Explanation of symbols

1 Horizontal machining center 2 Bed 3 Moving column 5 Saddle 7 Quill (spindle support)
9 Spindle 25 Tool Magazine 40 Work Dispensing Device 42 Dispensing Tool 43 Casing 46 Rotating Body 46b Tapered Part (Fitting Part)
47 Feed axis
48 Slide key 50 Extruded member
50b Sliding recess 52 Nut member 55 Work contact member

Claims (3)

A spindle support that can be rotated left and right, up and down, and supported by a spindle so that the spindle can be rotated, a tool magazine that can store replacement tools to be mounted on the spindle, and tool exchange between the spindle and the tool magazine A horizontal machining center equipped with a tool changer that moves the tool mounted on the spindle to the left, right, up, down, and forward to process the workpiece, and includes a dispensing tool that pushes the processed workpiece to the dispensing position. A workpiece dispensing device that is stored in a tool magazine so as to be exchangeable with the spindle,
A casing that is long in the axial direction, a rotating body that is rotatably supported on the base side of the casing, a feed shaft that is fixed to the axial center of the rotating body and protrudes toward the front end side of the casing, and a non-rotating state in the casing And a nut member which is provided so as not to move relatively in the axial direction on the base side of the extrusion member and is screwed to the feed shaft. A detachable fitting part and an engaging part that can be engaged with the spindle support body in the casing, respectively , to constitute a dispensing tool,
The casing is formed into a cylindrical shape that is long in the axial direction, and a cylindrical push-out member whose tip is closed in the casing is provided so as to be movable in the axial direction in a non-rotating state, and a nut member is fixed to the base side of the push-out member Then, the feed shaft and the nut member are housed in the closed space in the extrusion member, and a replaceable work contact member is provided at the tip of the extrusion member,
The feed shaft is rotated integrally with the rotating body by the rotation of the main shaft, the nut member and the push member are moved forward along the feed shaft by the non-rotating casing and the push member, and the workpiece contact member moves the work in the processing position. A workpiece dispensing device for a horizontal machining center, wherein the workpiece is dispensed by pushing to a dispensing position . When the fitting portion is mounted in the mounting hole of the main shaft, the engaging portion is fitted into the engaging hole of the main shaft support body so that the casing is prevented from rotating, and a sliding key is provided in the casing. 2. A horizontal machining center according to claim 1 , wherein a sliding recess is formed in a sliding portion on an outer periphery of the pushing member, and the pushing member is prevented from rotating by fitting the sliding recess and the sliding key. Work pay-out device. 3. The horizontal machining center according to claim 1, wherein the rotary body is configured to be rotated by a rigid tap cycle function of a spindle included in the horizontal machining center, and the workpiece discharge is completed in one cycle. Work payout device.

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