JP2009028869A - Nc lathe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an NC lathe which can carry out turning and machining of a long workpiece over the entire length without inverting (setup change) of the workpiece, automatically and safely, based on numeric control. <P>SOLUTION: The NC lathe has: a main spindle section 6 which is provided with an automatic right chuck 7 and an automatic left chuck 5 on both sides of a through hole penetrated therein, for securing the long workpiece 32 thereto and rotating the same; right and left tailstocks 14, 1 which are arranged on one of beds of the main spindle section 6, for rotatably gripping one end of the long workpiece 32; right and left reciprocating mounts 8, 4 which are movably arranged between the main spindle section 6 and the right and left tailstocks 14, 1, respectively; a workpiece suspension support 11 which is arranged in the right reciprocative mount 8, for mounting the long workpiece 32 thereon; right and left tool rests 9, 3 which are arranged on the right and left reciprocating mounts 8, 4, for setting a tool for turning and machining one portion of the long workpiece 32; and a console panel 12 which commands and controls movement and turning and machining of the long workpiece 32, based on numerical information. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an NC lathe that performs turning by rotating a cylindrical or solid long workpiece.

  In general, when machining both ends and outer diameter of a cylindrical or solid long workpiece, a technique of machining using an NC lathe is known (for example, see Patent Document 1). When using an NC lathe with a spindle through hole, first, the work is passed through the spindle through hole by manual operation and the right side is machined. After machining the right side, the workpiece is manually extracted again, manually reversed (replacement), the opposite side is machined through the spindle through hole, and then the workpiece is manually removed.

Further, when using a lathe that has a small spindle through-hole and cannot pass a long workpiece through the spindle through-hole, an anti-vibration jig is required to hold the workpiece at two points. After centering this bracing jig, the right side of the long workpiece is machined and manually reversed (replacement), and the other side is machined by adjusting the pivoting jig again.
JP 2001-259967 A

  In the conventional NC lathe described above, when machining both ends and the outer diameter of a long workpiece, the workpiece is manually passed through the spindle through hole and the right side is machined. After machining the right side, the workpiece is extracted again by manual operation and manually reversed (set-up), and the opposite side is machined again through the spindle through hole.

  In addition, when using a lathe with a small spindle through-hole and a long workpiece that cannot be passed through this spindle through-hole, set the anti-vibration jig and center it, then turn the long workpiece manually (set-up) Then, machining is performed over the entire length of the long workpiece. There is a problem that it takes a lot of time to manually perform the above-described reversal (replacement) of the long workpiece.

  In order to eliminate the work reversal (replacement) work and the steadying jig, it is considered to use a lathe capable of machining the both sides of the workpiece simultaneously by enlarging the spindle through hole and passing the long workpiece through the through hole. It is done. However, in this case, a special jig is required to pass the long workpiece through the through hole and pull it out again. There is a problem that it takes a lot of time to manually perform operations such as attachment, removal, and movement of the jig.

  The present invention has been made in order to solve the above-mentioned problems. It can be turned over the entire length of a workpiece without reversing (changing the setup) a long workpiece, and can be automatically and efficiently controlled by NC control. An object of the present invention is to provide an NC lathe that can be safely performed with accuracy.

  In order to achieve the above object, the present invention provides an NC lathe for grasping the outer diameter of a long workpiece and turning both sides of the workpiece. A main spindle portion that is provided with an automatic chuck and fixes and turns the workpiece inserted into the through hole, and a first tailstock that is provided on one bed of the main spindle portion and rotatably holds one end of the workpiece. A first carriage that is movably provided between one of the main shaft portions and the first tailstock, and a workpiece suspension that is provided on the first carriage and on which the workpiece is placed. A first tool rest provided on a support and a tool for turning one of the workpieces provided on the first carriage, and a second end of the workpiece provided on the other bed of the main shaft portion are rotatable. The second tailstock to be gripped by And a second carriage provided movably between the second tailstock and a tool for turning the other of the workpieces provided on the second carriage. It has a tool rest, and an operation panel that commands and controls the movement and turning of the workpiece based on numerical information.

  According to the NC lathe of the present invention, a long workpiece can be processed over the entire length of the workpiece without reversing (changing the setup), and the turning of the long workpiece can be automatically and efficiently performed with high accuracy. It can be carried out.

  Embodiments of an NC lathe according to the present invention will be described below with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

  FIG. 1 is a front view showing the overall configuration of the NC lathe according to the first embodiment of the present invention.

  First, the overall configuration of the NC lathe will be described with reference to FIG.

  This NC lathe is characterized by gripping the outer diameter of a long workpiece and turning both sides of the workpiece.

  A right tailstock 14 which is a first tailstock is provided on one right bed of the main shaft portion 6. The right tailstock 14 has a function of positioning the long work 32 by NC control when the long work 32 is loaded.

  The NC control is a numerical control (Numerical Control), which is a control method for instructing an operation to be performed based on numerical information, and is used in NC machine tools and the like. In the case of this NC lathe, numerical control is performed by operating the operation panel 12.

  Between the right side of the main shaft portion 6 and the right tailstock 14, a right carriage 8 that is a movable first carriage is provided. The right carriage 8 is provided with a work suspension support 11 on which the long work 32 is placed when the long work 32 is loaded.

  On the other left bed of the main shaft portion 6, a left tailstock 1 which is a second tailstock is provided. The left tailstock 1 has a function of automatically loading the long workpiece 32 into the through hole 33 (see also FIG. 2) of the main shaft portion 6.

  Between the left side of the main shaft portion 6 and the left tailstock 1, a left carriage 4 which is a movable second carriage is provided. Further, a right tool post 9 as a first tool post and a left tool post 3 as a second tool post are provided on both sides of the main spindle portion 6. Thus, the long workpiece 32 can be processed over the entire length of the long workpiece 32 without being reversed (replacement).

  Next, the main shaft portion 6 will be described with reference to FIG.

  FIG. 2 is an enlarged cross-sectional view showing an automatic chuck of the spindle portion 6 of FIG.

  As shown in the figure, the main shaft portion 6 has a large through hole 33 through which a long work 32 is inserted and loaded. In order to fix the inserted long workpiece 32, a right automatic chuck 7 as a first automatic chuck and a left automatic chuck 5 as a second automatic chuck are provided on both sides of the through-hole 33. Further, two bearings are provided on the outer surface of the main shaft portion 6 so that the long workpiece 32 fixed via the gear 18 can be smoothly turned by a motor (not shown). As described above, the long workpiece 32 can be smoothly inserted by enlarging the through hole 33 of the main shaft portion 6.

  Next, the right tool post 9 as the first tool post will be described with reference to FIG.

  FIG. 3 is a configuration diagram showing the ATC device 10 of the right tool rest 9 of FIG.

  As shown in this figure, an ATC device (Automatic Tool Changer) 10 is provided in a right tool post 9 which is a kind of tool post turret. The ATC device 10 includes a gripper 20 that holds a tool, an ATC arm 19 that moves the gripper 20, a traverser 21, a slider 22, a tool changing manual door 23, a clamper 24, a relay box 25, and a magazine 26. As described above, by providing the right tool rest 9 with the ATC device 10, it has a function of automatic tool change and can cope with turning of a long workpiece 32 having a small diameter.

  Next, the right measurement sensor 16 that is the first measurement sensor and the left measurement sensor 15 that is the second measurement sensor will be described with reference to FIG.

  FIG. 4 is a schematic front view illustrating the right measurement sensor 16 and the left measurement sensor 15 of FIG.

  As shown in FIG. 1 and FIG. 1, the left measurement sensor 15 is installed on the left tool post 3. The right measurement sensor 16 is installed on the right tool post 9. By contacting the long workpiece 32, the levers 35 of the left measurement sensor 15 and the right measurement sensor 16 are operated. Thus, the right measurement sensor 16 attached to the right tool rest 9 placed on the right carriage 8 and the left measurement sensor 15 attached to the left tool rest 3 placed on the left carriage 4 make the length longer. The overall length of the shank workpiece 32 can be automatically measured.

  A processing procedure of the long workpiece 32 according to the present embodiment configured as described above will be described with reference to FIGS.

  FIG. 5 is an explanatory view for explaining the flow of conveying the long work 32, and is a schematic front view of an NC lathe (the tool post is omitted) showing the transfer position of the long work 32. FIG. FIG. 7 is a schematic front view of an NC lathe (the tool post is omitted) showing the position of the workpiece when machining the left end portion of the workpiece 32, and FIG. 7 is an NC showing the position of the workpiece when machining the left outer diameter of the long workpiece 32. FIG. 8 is a schematic front view of a lathe (the tool post is omitted), and FIG. 8 is a schematic front view of an NC lathe (the tool post is omitted) showing the position on the workpiece when machining the right end of the long workpiece 32. 9 is a schematic front view of the NC lathe (the tool post is omitted) showing the position of the long workpiece 32 at the right outer diameter machining.

  The processing procedure of the long workpiece 32 is in the order of all processing on the left end, processing on the left outer diameter, all processing on the right end, and processing on the right outer diameter.

  First, the changing position of the long work 32 will be described with reference to FIG.

  As shown in FIG. 5, a long work 32 is lifted by a crane or the like, and a substantially central portion of the long work 32 is placed on the work suspension support 11 on the right carriage 8. The right end portion of the long work 32 is set on the rotatable right work holder 13 of the right tailstock 14, and the long work 32 is held. This position is used as a transfer position for the long work 32.

  Next, processing of the left end portion of the long workpiece 32 will be described with reference to FIG. By the NC control, the long workpiece 32 held by the workpiece suspension support 11 and the right workpiece holder 13 is automatically inserted into the through-hole 33 of the main shaft portion 6 shown in FIG. 2, and stops at a specified position. The long work 32 stops at a position protruding from the left automatic chuck 5 of the main spindle portion 6. The long workpiece 32 is gripped by the left automatic chuck 5 and the right automatic chuck 7 of the main shaft portion 6. By the NC control, the work suspension support 11 is automatically lowered and retracted to a position where it does not interfere when the stacked long work 32 is processed.

  Further, by NC control, the entire length of the long workpiece 32 is automatically measured using the left measurement sensor 15 installed on the left tool post 3 and the right measurement sensor 16 installed on the right tool post 9. The machining allowance at the end is determined, and the preparation for machining is completed. By this automatic measurement, the entire left end portion of the long workpiece 32 can be processed.

  Next, the outer diameter machining of the left side of the long workpiece 32 will be described with reference to FIG. After the end machining on the left side of the long workpiece 32 is completed, preparation for the outer diameter machining on the left side of the long workpiece 32 is performed. By NC control, the rotatable left work holder 2 of the left tailstock 1 moves to a position where the left work left end of the spindle portion 6 designated in advance is held, and the left work end of the long work 32 is moved. It is automatically gripped by the left work holder 2.

  Next, the grasping of the two left automatic chucks 5 and the right automatic chuck 7 of the spindle portion 6 is released by NC control. Thereafter, the long workpiece 32 held by the left workpiece holder 2 and the right workpiece holder 13 is moved to a predetermined position on the left side of the spindle portion 6 by NC control. Further, the long workpiece 32 is gripped by the two left automatic chucks 5 and the right automatic chuck 7 of the spindle portion 6 by NC control.

  Further, by NC control, the position of the end of the long workpiece 32 is automatically measured by using the left measurement sensor 15 installed on the left tool post 3 and the right measurement sensor 16 installed on the right tool post 9 to process the workpiece. Is ready. By this automatic measurement, the left outer diameter of the long workpiece 32 can be processed.

  Next, processing of the right end portion of the long workpiece 32 will be described with reference to FIG. After the processing of the left outer diameter of the long workpiece 32 is completed, preparation for processing the right end of the long workpiece 32 is performed. Further, the grasping of the two left automatic chucks 5 and the right automatic chuck 7 of the main shaft portion 6 is released by the NC control.

  In addition, the long workpiece 32 held by the left workpiece holder 2 of the left tailstock 1 and the right workpiece holder 13 of the right tailstock 14 is controlled by NC control at a predetermined position on the right side of the spindle portion 6. Move up.

  Next, the long workpiece 32 is grasped by the two left automatic chucks 5 and the right automatic chuck 7 of the spindle portion 6 by NC control. By NC control, the right work holder 13 of the right tailstock 14 is automatically detached and retracted to a position where it does not interfere when machining.

  Further, by NC control, the position of the end of the long workpiece 32 is automatically measured by the right measurement sensor 16 of the right tool rest 9, and the preparation for turning is completed. By this automatic measurement, the entire right end portion of the long workpiece 32 can be processed. Thereafter, after the machining of the right end of the long workpiece 32 is completed, preparation for the outer diameter machining on the right side of the long workpiece 32 is started.

  Next, the outer diameter machining on the right side of the long workpiece 32 will be described with reference to FIG. By NC control, the right workpiece holder 13 of the right tailstock 14 moves to a position designated in advance, and holds the right end portion of the long workpiece 32. Thereafter, the gripping state of the two left automatic chucks 5 and the right automatic chuck 7 of the spindle portion 6 is released by NC control. Further, the long workpiece 32 gripped by the left workpiece holder 2 and the right workpiece holder 13 is controlled by NC control in a predetermined position, that is, the right automatic chuck of the main spindle portion 6 at the right end of the long workpiece 32. Move to the position protruding from 7.

  Next, by the NC control, the work suspension support 11 is automatically moved to a position designated in advance, is automatically raised, and the long work 32 is gripped. At this time, the long workpiece 32 is held at three locations, that is, the left workpiece holder 2, the workpiece suspension support 11, and the right workpiece holder 13. Further, by NC control, the left work holder 2 of the left tailstock 1 is automatically detached and retracted to a position where it does not interfere when machining.

  Next, the long workpiece 32 gripped by the workpiece suspension support 11 and the right workpiece holder 13 of the right tailstock 14 is moved to a predetermined position on the right side of the spindle portion 6 by NC control. Next, the long workpiece 32 is grasped by the right automatic chuck 7 of the spindle portion 6 by NC control. Thereafter, the workpiece suspension support 11 is automatically lowered by NC control, and retracts to a position where it does not interfere when machining.

  Next, by NC control, the right measurement sensor 16 of the right tool rest 9 automatically measures the position of the right end of the long workpiece 32, and the preparation for machining is completed. By this automatic measurement, the outer diameter machining of the right side of the long workpiece 32 becomes possible.

  After the machining of the outer diameter on the right side of the long work 32 is completed, preparations for changing the long work 32 are started. Next, the workpiece suspension support 11 is moved to a position designated in advance by NC control, and is automatically raised to hold the long workpiece 32.

  Next, the grasping state of the right automatic chuck 7 of the spindle portion 6 is released by NC control, and the long workpiece 32 held by the right workpiece holder 13 and the workpiece suspension support 11 is designated as shown in FIG. Move to the workpiece transfer position. Thereafter, the long workpiece 32 is transferred at the workpiece transfer position.

  According to the present embodiment, the long workpiece 32 can be processed over the entire length of the long workpiece 32 without reversing (changing the setup), and the processing of the long workpiece 32 can be performed automatically and efficiently. Can be done with precision.

  Next, the right workpiece holder 13 and the left workpiece holder 2 will be described with reference to FIGS. 10 and 11.

  10 is a block diagram showing the right work holder 13 of the right tailstock 14 which is the first tailstock of FIG. 1, and FIG. 11 is the left heart which is the second tailstock of FIG. It is a block diagram which shows the left workpiece holding tool 2 of the pedestal 1. FIG.

  As shown in FIGS. 10 and 11, the right end of the long work 32 is held by a right work holder 13 that is a rotatable chuck, and the left end of the long work 32 is a left work holder 2 that is a rotatable chuck. Is held by. The left workpiece holder 2 includes a buffer material 27 having a cushion mechanism.

  According to the present embodiment, the cushioning material 27 is provided on at least one of the right work holder 13 of the right tailstock 14 and the left workpiece holder 2 of the left tailstock 1, whereby the long work 32 is moved in the left-right direction. Even when a fine asynchronous operation of the right tailstock 14 and the left tailstock 1 occurs during automatic movement, this can be avoided.

  The workpiece suspension support 11 and the small-diameter workpiece suspension support 34 will be described with reference to FIGS.

  12 is a block diagram showing a work suspension support 11 on the right carriage 8 in FIG. 1, and FIG. 13 is a block diagram showing a small diameter work suspension support 34 provided on the side surface of the right tool rest 9 in FIG. It is.

  As shown in FIGS. 12 and 13, a work suspension support 11 is provided on the right carriage 8 independently of the right tool rest 9, and a small-diameter work suspension support 34 is provided on the side surface of the right tool rest 9. Is provided.

  The work suspension support 11 is installed on the right carriage 8 via the base 31. The work suspension support 11 includes a cradle 28 that receives the long work 32, a shaft 29 that supports the cradle 28 so as to be movable up and down, and a roller bearing 30 that smoothly rotates the shaft 29. The work suspension support 11 is removed or automatically lowered after loading the long work 32, and measures are taken so as not to hinder the turning of the long work 32.

  On the other hand, a small-diameter workpiece suspension support 34 is installed on the side surface of the right tool rest 9 so as to be compatible with a small-diameter long workpiece 32.

  According to the present embodiment, by providing the workpiece suspension support 11 on the right carriage 8, the long workpiece 32 can be automatically loaded on the NC lathe, and the small-diameter workpiece suspension support 34 is provided on the side surface of the right tool rest 9. By providing it, it is possible to cope with automatic loading even for a long workpiece 32 having a small diameter.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments described above, and departs from the gist of the present invention by combining the configurations of the embodiments. Various modifications can be made without departing from the scope.

The front view which shows the whole structure of NC lathe of embodiment of this invention. The expanded sectional view which shows the automatic chuck | zipper of the spindle part of FIG. The block diagram which shows the ATC apparatus of the right tool post of FIG. The schematic front view explaining the left measurement sensor and right measurement sensor of FIG. It is explanatory drawing explaining the flow of conveyance of a long work, and is a schematic front view of NC lathe (a tool post is abbreviate | omitted) which shows the transfer position of a long work. It is explanatory drawing explaining the flow of conveyance of a long workpiece | work, and is a schematic front view of NC lathe (a tool post is abbreviate | omitted) which shows the position of the workpiece | work at the time of the left end part processing of a long workpiece. It is explanatory drawing explaining the flow of conveyance of a long workpiece | work, and is a schematic front view of NC lathe (a tool post is abbreviate | omitted) which shows a position in the workpiece | work at the time of the left outer diameter process of a long workpiece | work. It is explanatory drawing explaining the flow of conveyance of a long workpiece | work, and is a schematic front view of NC lathe (a tool post is abbreviate | omitted) which shows a position at the workpiece | work at the time of the right end part processing of a long workpiece | work. It is explanatory drawing explaining the flow of conveyance of a long workpiece | work, and is a schematic front view of NC lathe (a tool post is abbreviate | omitted) which shows a position in the workpiece | work at the time of the right side outer diameter process of a long workpiece | work. The block diagram which shows the right workpiece holder of the right tailstock of FIG. The block diagram which shows the left workpiece holder of the left tailstock of FIG. The block diagram which shows the workpiece | work suspension support on the right carriage in FIG. The block diagram which shows the small diameter work suspension support provided in the side surface of the right tool post of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Left tailstock, 2 ... Left work holder, 3 ... Left tool rest, 4 ... Left reciprocating base, 5 ... Left automatic chuck, 6 ... Main shaft part, 7 ... Right automatic chuck, 8 ... Right reciprocating base, 9 ... Right tool rest, 10 ... ATC device, 11 ... Work suspension support, 12 ... Operation panel, 13 ... Right work holder, 14 ... Right tailstock, 15 ... Left measurement sensor, 16 ... Right measurement sensor, 17 ... Bearing 18 ... gear, 19 ... ATC arm, 20 ... gripper, 21 ... traverser, 22 ... slider, 23 ... manual door for tool change, 24 ... clamper, 25 ... relay box, 26 ... magazine, 27 ... buffer material, 28 ... Receiving base, 29 ... shaft, 30 ... roller bearing, 31 ... base, 32 ... long workpiece, 33 ... through hole, 34 ... suspension support for small diameter workpiece, 35 ... lever.

Claims (4)

In an NC lathe that grasps the outer diameter of a long workpiece and turns both sides of this workpiece,
A main spindle portion which is provided with a first automatic chuck and a second automatic chuck on both sides of the through-hole penetrated to fix and turn the workpiece inserted into the through-hole;
A first tailstock that is provided on one bed of the main shaft portion and rotatably grips one end of the workpiece;
A first carriage provided movably between one of the main shaft portions and the first tailstock;
A work suspension support provided on the first carriage and placing the work;
A first tool post on which a tool for turning one of the workpieces provided on the first carriage is installed;
A second tailstock that is provided on the other bed of the main shaft portion and rotatably grips the other end of the workpiece;
A second carriage provided movably between the other of the main shaft portions and the second tailstock;
A second tool post for installing a tool provided on the second carriage for turning the other of the workpieces;
An operation panel that commands and controls the movement and turning of the workpiece based on numerical information;
NC lathe characterized by having.   The NC lathe according to claim 1, wherein each of the first tailstock and the second tailstock includes a chuck that rotatably grips an outer diameter of the workpiece.   The NC lathe according to claim 1 or 2, wherein a cushion mechanism is incorporated in at least one of the chucks of the first tailstock and the second tailstock.   The NC lathe according to claim 1, wherein the workpiece suspension support is also attached to a side surface of the first tool post.

Images