WO2014027464A1

WO2014027464A1 - Processing system and method for processing short, rod-shaped workpieces using processing system

Info

Publication number: WO2014027464A1
Application number: PCT/JP2013/004863
Authority: WO
Inventors: 誠司山浦; 和秀小杉
Original assignee: 長野オートメーション株式会社; 日立粉末冶金株式会社
Priority date: 2012-08-17
Filing date: 2013-08-15
Publication date: 2014-02-20
Also published as: KR102082370B1; TWI632022B; KR20150041084A; CN104619443A; TW201408427A; JP6234926B2; CN104619443B; JPWO2014027464A1; HK1209384A1

Abstract

Provided is a processing system that has a first processing device (10) that processes short, rod-shaped workpieces. Said first processing device contains the following: a first rotation unit (19) that grips and rotates workpieces; a supply path (13) provided along the axis of a first primary spindle (14) of the first rotation unit so as to pass completely through said first primary spindle; a first chuck (15) that grips workpieces supplied via said supply path; and a first tool holder (30) that holds a tool that processes the workpiece gripped by the first chuck. This processing system also has a supply unit (50) that pneumatically supplies workpieces to the supply path from the end of the first primary spindle on the side opposite the first chuck. The aforementioned first tool holder includes a stopper (31) that stops workpieces pneumatically sent via the supply path at a prescribed position at which the workpiece protrudes from the first chuck.

Description

Machining system and method for machining short bar-shaped workpiece by machining system

The present invention relates to a machining system and a machining method for supplying a workpiece through a through hole of a spindle.

In the international publication WO2002 / 034439, an NC lathe control device in which through holes are formed along an axis extracts product length dimension data and cutting width data from a machining program. From these data, the position of the feeder is determined, and on the basis of the position of the feeder, the supply of the bar from the bar support, the opening / closing of the steady rest chuck, the feed of the bar, and the exchange are described. ing.

It is required to process a short rod-shaped member having a length of several centimeters to several tens of centimeters as a workpiece (workpiece). For example, in a processing apparatus provided with a through hole along the axis, if a short member of about several centimeters to several tens of centimeters is to be processed, positioning cannot be performed with a feeder similar to a long bar.

One embodiment of the present invention is a processing system having a first processing apparatus that processes a short and rod-shaped workpiece. The machining system includes a first turning unit for gripping and turning a workpiece, a supply path provided along the axis of the first main shaft so as to penetrate the first main shaft of the first turning unit, and a supply A first chuck for gripping the workpiece supplied via the path; and a first tool holder for holding a tool for processing the workpiece gripped by the first chuck. The processing system further includes a supply unit that supplies a workpiece to the supply path from the side opposite to the first chuck of the first main spindle and pressure-feeds the workpiece, and the first tool holder is a workpiece that is pressure-fed through the supply path. A stopper that stops at a predetermined position protruding from the first chuck. The supply unit may supply a plurality of works one by one into the supply path one by one, and pump the plurality of works connected in the supply path.

In this machining system, a workpiece (workpiece) is pressure-fed in a supply path provided along an axis, and a position is defined using a stopper when protruding from the first chuck. Therefore, even a short workpiece can be supplied to the chuck from the opposite side of the main shaft, and the chuck can grip the workpiece at a predetermined position for processing. For this reason, it is possible to supply a plurality of workpieces to the chuck one after another via a supply path that penetrates the main shaft, and the time for supplying a short workpiece to the chuck can be shortened.

Furthermore, the stopper mounted on the tool holder positions the workpiece. For this reason, after the workpiece is positioned by the stopper, machining of the workpiece can be started immediately (in a short time) using the tool held in the same tool holder. Therefore, in this machining system, the time (takt time) required for supplying and machining a short workpiece can be shortened.

The stopper includes a detection hole that blows out gas in a direction facing the workpiece, and the processing system includes a detection unit that detects the position of the workpiece by blocking air blowing from the detection hole when the workpiece hits the stopper. It is desirable. Since it can be confirmed by the detection unit that the workpiece has reached the position of the stopper, it is not necessary to waste a long time to ensure the movement of the workpiece, the machining accuracy of the workpiece can be improved, and the yield can be improved. Therefore, the machining time can be shortened and the workpiece machining accuracy can be improved.

It is effective that the machining system has a second machining device for further machining the workpiece machined by the first machining device. The second processing apparatus includes a second turning unit that holds the second chuck at a position facing the first chuck of the first turning unit, and a tool that processes the workpiece gripped by the second chuck. A second tool holder for holding. The processing system includes at least one position of the first swivel unit and the second swivel unit, a first position where the second chuck is separated from the first chuck, and a second chuck which is the first chuck. It is desirable to have a moving unit that moves relatively to a second position that approaches and grips the work gripped by the first chuck. The moving unit brings the position of the second turning unit closer to the first chuck to such an extent that the second chuck grips the work gripped by the first chuck. In this processing apparatus, one end (front end, front end) of the workpiece can be processed by the first processing apparatus, and the other end (rear end) of the workpiece can be processed by switching to the second processing apparatus. Therefore, it is possible to provide a machining system capable of machining both ends of a short workpiece.

The second processing apparatus includes a discharge path that passes through the second main shaft of the second swivel unit and discharges the processed workpiece from the second chuck along the axis of the second main shaft. The tool holder preferably includes a blow unit that pressure-feeds the workpiece to the discharge path through the second chuck. The workpiece processed at both ends can be discharged through the discharge path along the axis of the second turning unit, and the time required for paying out the processed workpiece can be shortened.

It is desirable that the machining system further has a control unit including functions for controlling opening and closing of the first chuck, opening and closing of the second chuck, and movement of the moving unit. The control unit further protrudes the position of the work gripped by the first chuck from the first clamp position from the first clamp position processed by the tool held by the first tool holder by the stopper. It is desirable to include a function of changing to a second clamp position for switching from the first chuck to the second chuck. When the stopper includes the detection unit, the control unit has a first position confirmation function (functional unit) for confirming the first clamp position of the workpiece held by the first chuck by the detection unit; It is desirable to include a second position confirmation function (functional unit) for confirming the second clamp position of the workpiece by the detection unit when changing from the first chuck to the second chuck. With the second position confirmation function, the position held by the second chuck can be defined with reference to the front end of the processed workpiece. Thereafter, by machining the rear end of the workpiece held by the second turning unit, the machining accuracy of the short workpiece, particularly the machining accuracy of the full length can be improved.

Another aspect of the present invention is a method of machining a short bar-shaped workpiece by a machining system. The machining system includes: a first turning unit that grips a workpiece supplied through a supply path provided along an axis of the first main shaft so as to penetrate the first main shaft by a first chuck; And a first tool holder that holds a tool for processing a workpiece gripped by one chuck. The processing system further includes a supply unit that supplies the workpiece to the supply path from the side opposite to the first chuck of the first main spindle. The method includes the following steps.
1. The supply unit pumps the work in the supply path.
2. Stop the workpiece pressure-fed through the supply path with a stopper mounted on the first tool holder at a predetermined position protruding from the first chuck.
3. Machining the workpiece gripped by the first chuck with the tool held in the first tool holder.

The tip (one end, front end) of a short workpiece can be held at a predetermined position by the first chuck by a method (manufacturing method, processing method) including these steps. For this reason, in the 1st processing device, the work set in the predetermined position can be processed.

In the case where the stopper includes a detection hole that blows out gas in a direction facing the workpiece, it is effective that the method further includes the following steps.
-Check the position of the workpiece by hitting the workpiece against the stopper and hindering air blowing from the detection hole.

The processing system may include a second processing device that further processes the workpiece processed by the first processing device. The second processing apparatus includes a second turning unit that holds the second chuck at a position facing the first chuck of the first turning unit, and a tool that processes the workpiece gripped by the second chuck. And a second tool holder for holding. The processing system includes a moving unit that moves a position of at least one of the first turning unit and the second turning unit. More preferably, the method includes the following steps.
The moving unit moves the relative position of the first swivel unit and the second swivel unit, the second chuck moves away from the first chuck, the second chuck moves toward the first chuck, And moving to the second position for gripping the work gripped by the first chuck.
-Change the workpiece from the first chuck to the second chuck.
The moving unit moves the relative position of the first turning unit and the second turning unit from the second position to the first position;
-A workpiece mounted on the second tool holder is processed by the workpiece gripped by the second chuck.

両端 Both ends of a short workpiece can be processed by a method (manufacturing method, processing method) including these steps.

Furthermore, when the second processing apparatus includes a discharge path that passes through the second main shaft and discharges the processed workpiece from the second chuck along the axis of the second main shaft, the method includes: It is desirable to include the following steps:
-The blow unit mounted on the second tool holder feeds the processed workpiece to the discharge passage through the second chuck.

¡By the method including this step, it is possible to shorten the time required for discharging the processed workpiece.

Further, it is effective that the method includes the following steps.
The position at which the first chuck holds the work is a position further protruding from the first clamp position from the first clamp position where the work is processed by the tool held by the first tool holder, Changing to a second clamping position where the first chuck can be moved to the second chuck.

It is effective that this step further includes the following steps.
-The position of the work gripped by the first chuck is confirmed by the work hitting a stopper set at the first clamp position (support position, work position) and the air blowing from the detection hole being inhibited. thing.
-The workpiece hits the stopper set at the second clamp position (support position, workpiece position) when the workpiece is moved from the first chuck to the second chuck, and air blowing from the detection hole is obstructed. To confirm.

The above method can be provided as a method for controlling a processing apparatus. The control method can be provided in a state where it can be recorded on a suitable recording medium such as a CD-ROM as a program (program product) executed in a control unit having a CPU and a memory, or can be downloaded via a computer network such as the Internet. .

The figure which shows the outline | summary of a both-ends processing apparatus. The figure which shows a mode that a workpiece | work is supplied to a 1st processing apparatus and a workpiece | work is discharged | emitted from a 2nd processing apparatus. The figure which shows a mode that a workpiece | work is carried over from a 1st turning unit to a 2nd turning unit. The timing chart which shows operation | movement of each unit. The figure which shows the 1st tool holder which moved to the stopper position. The figure which shows the 1st tool holder which moved to the processing position. The figure which shows the 1st tool holder which moved to the stopper position again. The figure which shows a mode that a workpiece | work is passed from a 1st chuck to a 2nd chuck. The figure which shows the 2nd tool holder which moved to the process position. The figure which shows the 2nd tool holder which moved to the blow position. The figure which shows a mode that a workpiece | work is discharged | emitted. The flowchart which shows the process of processing a workpiece | work.

FIG. 1 shows an example of a both-end processing apparatus. The both-end processing apparatus (processing system) 1 is a first processing apparatus (typically, a front end) that processes one end (tip, front end) of a short, rod-shaped workpiece (workpiece, workpiece to be processed, workpiece rod) 5. , A first lathe 10, a second processing device (typically a second lathe) 20 for processing the other end (rear end) of the workpiece 5, and a platform (chassis) for supporting them. 9 and the like. The first processing apparatus 10 includes a first turning unit (first support unit) 19 that grips and turns the workpiece 5, and a tool holder (first holding) on which a tool that processes the gripped workpiece 5 is mounted. Tool holder) 30. The first turning unit 19 includes a head stock 11, a first main shaft 14 that is rotatably supported by the head stock 11, and a through hole 13 is provided along the axis 12, and a motor 16 that rotationally drives the main shaft 14. Including. The through hole 13 functions as a supply path for the workpiece 5. The first turning unit 19 further includes a chuck (first chuck) 15 that is connected (communicated) with the supply path 13 and grips the workpiece 5 supplied through the supply path 13.

The second processing apparatus 20 includes a second turning unit (second support unit) 29 that grips and turns the workpiece 5 and a tool holder (second holder) on which a tool that processes the gripped workpiece 5 is mounted. Tool holder) 40. The second turning unit 29 includes a headstock 21, a spindle 24 that is rotatably supported by the headstock 21, and a through hole 23 provided along the axis 22, and a chuck that holds the workpiece 5 (second chuck). ) 25 and a motor 26 that rotationally drives the main shaft 24. The through hole 23 is connected to the chuck 25, and the workpiece 5 processed by the chuck 25 is discharged to the opposite side of the chuck 25 using the through hole as a discharge path 23.

The both-end machining apparatus 1 further includes a supply unit 50 for supplying the workpiece 5 from the opposite side to the first chuck 15 to the supply path 13 of the first turning unit 19, and a discharge path 23 of the second turning unit 29. A receiving unit 60 for receiving the processed workpiece 5 discharged from the vehicle, and a moving unit 80 for moving the second turning unit 29 back and forth along the rail 8 provided on the chassis 9. The moving unit 80 may move the first turning unit 19, and may move the first turning unit 19 and the second turning unit 29.

The supply unit 50 holds a plurality of workpieces 5 and includes a dispensing unit 51 that sequentially dispenses the workpieces 5 one by one, and a pressure feeding unit 52 that pushes the dispensed workpieces 5 into the supply path 13 and further pumps them. Including. The receiving unit 60 is located at the discharge end of the discharge path 23 of the main shaft 24 of the second turning unit 29, and receives a workpiece 61 that receives the work 5 discharged from the discharge path 23, and a stocker in which the processed work 5 is accumulated. 62, and a hose-like connection path 63 that connects the receiving port 61 and the stocker 62.

The moving unit 80 moves the second swivel unit 29 between the first position 81 where the second chuck 25 is separated from the first chuck 15 and the work in which the second chuck 25 is held by the first chuck 15. 5 to the second position 82 approaching the first chuck 15 to the extent of gripping 5. FIG. 1 shows a state in which the second turning unit 29 is at the first position 81. Hereinafter, moving the second turning unit 29 to the second position 82 and approaching the first turning unit 19 is referred to as forward movement, moving the second turning unit 29 to the first position 81, Moving away from one swivel unit 19 may be called retreat.

The both-end machining apparatus 1 further includes a machining position where the first tool holder 30 is machined by the tool to the workpiece 5 held by the first chuck 15, and a home where the tool is separated from the first chuck 15. It includes a first holder moving unit 39 that moves to a position. The both-end machining apparatus 1 further includes a first cover 100 that covers the vicinity of the first chuck 15 during machining using the tool mounted on the tool holder 30 and includes a function of preventing the scattering of a cut object and a soundproofing function, And a first cover driving unit 101 that controls the movement of the first cover 100. The both-end machining apparatus 1 further includes a machining position where the second tool holder 40 is machined by the tool on the workpiece 5 held by the second chuck 25, and a home where the tool is separated from the second chuck 25. And a second holder moving unit 49 that moves to a position. The both-end machining apparatus 1 further includes a second cover 200 that covers the vicinity of the second chuck 25 during machining of the tool mounted on the tool holder 40 and includes a function to prevent the scattering of the cut object and a soundproofing function, and a second cover 200. And a second cover driving unit 201 for controlling the movement of the cover 200.

The first cover 100 and the second cover 200 may cover the vicinity of the

chucks

15 and 25 only from above, respectively. It may cover the vicinity.

The both-end machining apparatus 1 further includes a main control unit 70 that controls the entire both-end machining apparatus 1 including the opening and closing of the first chuck 15, the opening and closing of the second chuck 25, and the operation of the moving unit 80. The main control unit 70 includes hardware resources including a CPU and a memory, and controls the both-end machining apparatus (machining system) 1 according to an algorithm defined in a program (program product) 74. The hatched lines in the drawing are control lines 79 that connect the main control unit 70 to each device or unit and transmit commands.

The main control unit 70 includes a work supply control unit 71 that controls the work supply unit 50, and a first turning control that controls the first turning unit 19 including opening and closing of the first chuck 15 and rotation of the main shaft 14. A unit 72, a first holder control unit 73 that performs control related to the first tool holder 30, and a cover opening / closing control unit 75 that opens and closes the

covers

100 and 200 are included. The main control unit 70 further relates to a second turning control unit 76 that controls the second turning unit 29 including the opening and closing of the second chuck 25 and the rotation of the main shaft 24, and the second tool holder 40. A second holder control unit 77 for performing control, and a position control unit 78 for controlling the position of the second turning unit 29 by the moving unit 80. The first holder control unit 73 includes a first position confirmation function 73a and a second position confirmation function 73b for confirming the position of the workpiece 5 in two stages by a stopper mounted on the tool holder 30 described later.

The both-end processing apparatus 1 further includes an air pipe 3 that supplies compressed air supplied from a suitable compressed air source, for example, the compressor 2, to an apparatus or unit that requires air blow. Examples of the unit that performs air blowing include the pressure feeding unit 52, the first tool holder 30, and the second tool holder 40.

2 and 3 show typical movements of the both-end processing apparatus 1. FIG. The first machining apparatus 10 of the both-end machining apparatus 1 shown in FIG. 2 inserts the workpiece 5 into the supply path 13 of the first swivel unit (first support unit) 19 by the supply unit 50, and then air blows. The state in which the workpiece 5 that has been fed by pressure through the supply path 13 is stopped by a stopper 31 mounted on the first tool holder 30 at a predetermined position protruding from the first chuck 15 is shown. The first tool holder 30 is moved to the stopper position close to the machining position by the holder moving unit 39.

In the both-end machining apparatus 1, the supply unit 50 puts a plurality of workpieces (workpieces) 5 in order into the supply path 13 provided along the axis 12, and pumps them. That is, the supply path 13 is filled with a plurality of workpieces 5 in a row and is pumped in that state. When the first work 5 in the row protrudes from the first chuck 15, the position of the first work 5 is defined using the stopper 31. Therefore, even the short workpiece 5 can be supplied from the opposite side to the chuck 15 so as to match the position to be processed. A plurality of workpieces 5 can be successively supplied to the chuck 15 on the opposite side via a supply path 13 that penetrates the main shaft, and a short workpiece can be continuously supplied to the chuck 15 in a short time. The supply unit 50 may supply one work 5 to the chuck 15 via the supply path 13 every time processing is completed without packing a plurality of works 5 in the supply path 13.

The rod-like workpiece 5 that is short with respect to the length of the main shaft 14 is supplied toward the chuck 15 through the supply passage 13 when the plurality of workpieces 5 are packed in the supply passage 13 along the main shaft 14. The plurality of workpieces 5 are not integrated in the supply path 13 as in the case of a rod-shaped workpiece longer than the main shaft 14 and are divided. For this reason, it is difficult to accurately control the position of the workpiece gripped by the chuck 15 even if the workpiece is simply operated by a feeder or the like from the opposite side of the spindle chuck. In this processing system 1, the work 5 packed in the supply path 13 is inserted from the rear (supply side) and stopped by hitting a stopper on the chuck 15 side. For this reason, the position gripped by the chuck 15 can be controlled even for a short workpiece, not a workpiece longer than the supply path 13 or an integrated workpiece.

In this processing system 1, the work 5 is pumped by air blow in the supply path 13, and the stopper 31 is brought into contact with one end (front end) 5 a of the short work 5 and aligned. With this method, it is possible to prevent an excessive force from acting on the stopper 31. Therefore, it is possible to provide a processing apparatus 1 that can suppress a decrease in accuracy of the stopper 31 due to a decrease in mechanical strength, fatigue, or the like and can perform positioning with high accuracy over a long period of time. Therefore, on the first processing device 10 side of the both-end processing device 1, the front end 5a side of the short workpiece 5 can be processed with high accuracy.

The short workpiece 5 suitable for processing (machining) by the machining system 1 and the machining method is a workpiece shorter than the length of the main spindle 14, for example, a workpiece 5 in the range of several centimeters to several tens of centimeters. The length of the workpiece 5 is, for example, 1 cm or more and 50 cm or less, 2 cm or more and 40 cm or less, and further 3 cm or more, 30 cm or less, or 25 cm or less, 20 cm or less, 15 cm or less, 10 cm or less. Good.

In the supply unit 50, the dispensing unit 51 loads the rod-like workpieces 5 stored in the magazine one by one at the entrance of the supply path 13. The pressure feeding unit 52 includes a rod portion 53 that extends so as to insert the workpiece 5 into the supply path 13 and a unit 54 that moves the rod portion 53 back and forth. The front end 55 of the rod portion 53 is a blowout port for compressed air. The pressure feeding unit 52 first inserts the workpiece 5 into the supply path 13 by a predetermined length using the rod portion 53, then retracts the rod portion 53 and blows air from the front end 55 of the rod portion 53. The work 5 is pumped. By pressure feeding, the workpiece 5 can be protruded from the chuck 15 without pressing the workpiece 5 directly inside the supply path 13. For this reason, the work 5 can be supplied to the chuck 15 via the supply path 13 without filling the supply path 13 with the plurality of works 5. Even when the supply path 13 is substantially filled with a plurality of workpieces 5, the workpiece 5 can be protruded from the chuck 15 by the same operation.

For example, when the 100 mm workpiece 5 is inserted into the supply passage 13, the pressure feeding unit 52 first inserts the rod portion 53 into the supply passage 13 by 150 mm to completely insert the workpiece 5 into the supply passage 13 that is a through hole. insert. Next, the rod portion 53 is retracted (drawn) by 50 mm, and air is blown from the front end 55 in a state where the front end 55 of the rod portion 53 is inside the supply path 13. Through these steps, the work 5 can be reliably inserted into the supply path 13, and the work 5 can be pressure-fed more reliably toward the chuck 15 by air blowing inside the supply path 13.

In the second machining apparatus 20 of the both-end machining apparatus 1 shown in FIG. 2, the workpiece 5 is held by the chuck 25 of the second turning unit (second support unit) 29 and the other end (rear end) 5b is machined. Then, the state in which the workpiece 5 is pumped to the discharge path 23 by the pumping unit (blow unit) 41 mounted on the second tool holder 40 through the second chuck 25 is shown. The second tool holder 40 is moved to the work blow position by the holder moving unit 49 although it is close to the machining position.

In the both-end processing apparatus 1, the work 5 is discharged (unloaded) from the both-end processing apparatus 1 by pressure-feeding the processed work 5 to the receiving unit 60 through the discharge path 23 provided along the axis 22. . Therefore, the processed workpiece 5 can be discharged by one action (simple operation) of blowing the workpiece, and the time required for discharging can be shortened. Furthermore, it is not necessary to arrange an unloading device in the vicinity of the second chuck 25, and the second turning unit 29 can be easily moved in the front-rear direction. The work 5 is discharged at the first position 81 at the rear, which is the home position of the second turning unit 29. Therefore, the receiving unit 60 has only to receive the workpiece 5 at that position, and the receiving unit 60 can be configured with a simple mechanism.

FIG. 3 shows a state in which the second turning unit 29 is moved to the second position 82 by the moving unit 80 and the workpiece 5 is changed from the chuck 15 of the first turning unit 19 to the chuck 25 of the second turning unit 29. Is shown. Before the work 5 is transferred to the second chuck 25 of the second swivel unit 29, the first swivel unit 19 performs the positioning process of the work 5 again after the front end 5a is processed, and the position of the work 5 is set. A state suitable for being gripped by the second chuck 25 is set. Therefore, in the second processing apparatus 20, the workpiece 5 can be gripped at a position that is based on the front end 5 a of the workpiece 5 that cannot be accessed when the second chuck 25 is gripped by the second chuck 25. In the second processing apparatus 20, the rear end 5 b of the workpiece 5 is processed while being gripped by the second chuck 25 with respect to the front end 5 a of the workpiece 5. For this reason, the shape including both ends 5a and 5b of the workpiece 5 and the entire length of the workpiece 5 can be processed with extremely high accuracy.

FIG. 4 shows the movement of each part (each unit) of the both-end machining apparatus 1 by a timing chart. The configuration and movement of each unit will be described in more detail with reference to this timing chart.

At time t1, the both-end processing apparatus 1 starts processing the workpiece A. First, the first processing apparatus 10 starts processing the front end (tip) 5a of the workpiece A. Therefore, the workpiece supply control unit 71 of the main control unit 70 dispenses one workpiece 5 from the dispensing unit 51 at time t1. The workpiece 5 may be a workpiece A to be processed. In normal operation, a plurality of workpieces 5 stay in the supply path 13, and a workpiece that is processed in advance and supplements the discharged workpieces 5 is paid out. At time t1, the first holder control unit 73 further moves the first tool holder 30 to the stop position using the first holder moving unit 39, and starts supplying air for position detection.

FIG. 5 shows the first tool holder 30 in a state of being moved to the stopper position. The first tool holder 30 has a stopper 31 mounted on one end and a processing tool (blade) 32 mounted (held) at a position retracted from the stopper 31. The stopper 31 includes a detection hole 34 that blows out gas (air) in a direction facing the workpiece 5 at the front end 33. The tool holder 30 includes a pipe 35 for supplying air for air blowing to the detection hole 34 of the stopper 31, a flow rate sensor 36 for monitoring the flow rate of air flowing through the pipe 35, and a position for detecting the position of the workpiece 5 by the air flow rate. And a detection unit 37. It is detected by the flow sensor 36 that the blowout of air from the detection hole 34 is inhibited by the work 5 hitting the stopper 31. The position detection unit 37 receives a signal for confirming that the front end 5a of the workpiece 5 is at the position of the stopper 31 (for example, a first clamp position P1 described later) based on the detection result of the flow sensor 36. To supply. The flow sensor 36 and the position detection unit 37 do not have to be mounted on the first tool holder 30, but it is desirable that the flow sensor 36 and the position detection unit 37 be disposed at a position close to the stopper 31 within a range in which the detection timing is small.

The position detection system (position confirmation device) including the flow rate sensor 36 and the position detection unit 37 determines the position of the workpiece 5 based on the flow rate of air blown from the stopper 31. Therefore, it is possible to provide a position detection system having a simple configuration using compressed air and having high reliability without clogging with cutting powder or the like. Further, the position of the workpiece 5 can be confirmed by the stopper 31 itself for positioning the workpiece. For this reason, it is not necessary to replace the stopper and the sensor, the time required for supplying the workpiece 5 can be shortened, and the process can be shifted to the next process in a minimum time. Furthermore, since the positional accuracy of the workpiece 5 can be improved, the reliability of the machining operation is also improved.

At time t1, the first position confirmation function 73a of the holder control unit 73 uses the position of the stopper 31 to process the front end 5a of the workpiece 5 (first clamp position, first support position, first Work position) P1. For example, the position (first clamp position) P1 of the stopper 31 is set at a position where the work 5 is stopped at a position where about 1/3 of the entire length of the work 5 protrudes from the chuck 15. The first clamping position P1 is preferably a position where the amount of deflection of the front end 5a when the workpiece 5 is gripped by the chuck 15 and rotated can be reduced. The amount by which the workpiece 5 protrudes from the chuck 15 can be determined by the processing position, amount, and processing tool, and the above values are merely examples.

When the stopper 31 is ready, the workpiece supply control unit 71 advances the rod portion 53 of the pressure feeding unit 52 and inserts the workpiece 5 into the supply path 13 at time t2. Further, the workpiece supply control unit 71 slightly retracts the rod portion 53 in the supply path 13 at time t3, sets the blow portion to the blow position, and blows out air for conveying the workpiece from the front end 55 of the rod portion 53 to remove the workpiece 5. Pump. When the work 5 is pumped inside the supply path 13, the plurality of works 5 staying in the supply path 13 are pushed one after another, the work A protrudes from the first chuck 15, hits the stopper 31, and the first The workpiece A stops at the clamping position P1.

When the front end 5a of the workpiece A hits the stopper 31 at time t3 ′, the flow of air from the detection hole 34 is inhibited, so that the flow rate of the position detection air is reduced. It is confirmed that the clamp position P1 has been reached.

When the front end 5a of the workpiece A reaches the first clamping position P1, the first turning control unit 72 grips (clamps) the workpiece A by the first chuck 15 at time t4, and at time t5, the motor 16 Is moved to rotate the first spindle (head) 14 and the rotation of the first chuck 15 is started. At this time, the stopper 31 is preferably moved in a direction slightly away from the workpiece A. At time t5, the cover opening / closing control unit 75 uses the cover driving unit 101 to move the first cover 100 so as to cover the first chuck 15, and starts air blow for processing.

When these preparations are completed, at time t6, the first holder control unit 73 moves the first tool holder 30 to the processing position, and the tool 32 held by the first tool holder 30 moves the front end 5a of the workpiece A. Start concrete processing. An example of the tool 32 is a cutting blade, which cuts the front end 5a of the workpiece A.

FIG. 6 shows a state in which the front end 5a of the workpiece 5 is being machined by the tool 32. A stopper 31 is mounted on the tool holder 30 together with the tool 32. Therefore, after the workpiece 5 is positioned by the stopper 31, the distance for moving the tool holder 30 in order to set the tool 32 on the front end 5a of the workpiece 5 is very short. The time (interval) at which machining is started by the tool 32 after the position of the front end 5a of the workpiece 5 is determined can be shortened. For example, the time from the positioning of the workpiece 5 by the stopper 31 to the start of cutting by the tool 32 can be sufficiently reduced to 1 second or less. It is also possible to sufficiently reduce the time from the start of supplying the workpiece 5 (time t1) to the start of machining the workpiece 5 (time t6) from about 1 second to 2 seconds. Since the mechanism for moving the tool 32 and the stopper 31 separately can be omitted, the space-saving and low-cost processing apparatus 1 can be provided.

When the processing is completed at time t7, the cover opening / closing control unit 75 opens the first cover 100 and stops the processing air blow. Further, the first turning control unit 72 stops turning of the first chuck 15 and unclamps the workpiece A. Further, the first holder control unit 73 moves the first tool holder 30 to the stop position again. At this time, the second position confirmation function 73b of the first holder control unit 73 is set to the position of the stopper 31, and the front end 5a of the work 5 is held (clamped) by the second chuck 25. Set to position (second support position, second workpiece position) P2. Further, the work supply control unit 71 supplies air for pressure feeding to the supply path 13 using the pressure feeding unit 52. As a result, the workpiece A that has been processed is pushed out of the first chuck 15 until the front end 5a of the workpiece A hits the stopper 31 set at the second clamp position P2.

FIG. 7 shows a state in which the stopper 31 of the tool holder 30 is set at the second clamp position P2. It can be stopped in a state where the position of the workpiece 5 that has been processed is further protruded from the first chuck 15 so as to be gripped by the second chuck 25. When the front end 5a of the workpiece A hits the stopper 31 at time t7 ′, air blowing from the detection hole 34 is inhibited. For this reason, the flow rate of the position detection air decreases, and it is confirmed by the position detection unit 37 that the processed front end 5a of the workpiece A has reached the second clamp position P2. For example, the position of the stopper 31 is set at a position P2 where the workpiece 5 can be stopped in a state where about 2/3 of the entire length of the workpiece 5 protrudes from the first chuck 15. The second clamp position P2 is desirably a position where the amount of deflection of the rear end 5b when the workpiece 5 is gripped and rotated by the second chuck 25 can be reduced.

When the position of the workpiece A is confirmed, the first turning control unit 72 grips (clamps) the workpiece A again by the first chuck 15 at time t8. At time t9, the holder control unit 73 retracts the first tool holder 30 to the home position and stops the position detection air. Further, the workpiece supply control unit 71 returns the pressure feeding unit 52 to the home position and starts preparation for supplying the next workpiece 5.

At time t <b> 10, the position control unit 78 moves the moving unit 80 to move the second turning unit 29 from the first position 81 to the second position 82 (advance) and move the second chuck 25 to the second position. 1 is brought close to the chuck 15. At time t11, the first turning control unit 72 unclamps the first chuck 15 and the second turning control unit 76 clamps the second chuck 25. As a result, the workpiece A is transferred from the first turning unit 19 to the second turning unit 29. That is, the workpiece A is transferred from the first chuck 15 to the second chuck 25. Processing of the front end 5a of the workpiece A by the first processing device 10 is completed, and processing of the rear end 5b of the workpiece A by the second processing device 20 is started.

FIG. 8 shows a state in which the workpiece 5 is changed from the first turning unit 19 to the second turning unit 29. The workpiece 5 is gripped by the second chuck 25 in a state where the front end 5a is set to the second clamp position P2 by the first chuck 15. Therefore, the workpiece 5 gripped by the second chuck 25 is positioned with reference to the front end 5 a of the workpiece 5 that fits inside the second chuck 25. By machining the rear end 5b of the workpiece 5 clamped by the second chuck 25 in this state, the rear end 5b of the workpiece 5 can be machined based on the front end 5a. Since the length of the rear end 5b can be accurately managed with respect to the front end 5a, the entire length of the workpiece 5 can be managed with a very small tolerance.

When the workpiece A is gripped by the second chuck 25, at time t12, the position control unit 78 moves the moving unit 80 backward to return the second turning unit 29 to the first position 81 of the home position. At time t <b> 13, the second turning control unit 76 moves the motor 26 to rotate the main shaft (head) 24 and starts the rotation of the second chuck 25. At the same time, the cover opening / closing control unit 75 moves using the cover driving unit 201 so as to cover the second chuck 25 with the second cover 200, and further starts air blow for processing.

When preparation for machining is completed, at time t14, the second holder control unit 77 moves the second tool holder 40 to the machining position by the second holder moving unit 49 and starts machining the rear end 5b of the workpiece A. To do.

FIG. 9 shows the second tool holder 40 in a state of being moved to the machining position. The second tool holder 40 has a blow unit 41 mounted on one end and a processing tool (blade) 42 mounted (held) at a position retracted from the blow unit 41. The blow unit 41 includes a hole (blow-out hole) 44 for blowing out gas (air) in a direction facing the workpiece 5 at the front end 43. The tool holder 40 includes a pipe 45 for supplying air for air blowing to the blow unit 41 and a valve 46 for turning on / off the air blow.

The tool 42 mounted on the second tool holder 40 is a cutting blade, for example, and can cut the rear end 5b of the workpiece A. The workpiece A gripped by the second chuck 25 is positioned with reference to the front end 5a. For this reason, the tolerance 5 at the time of cutting the rear end 5b of the workpiece A with the tool 42 is small, and the workpiece 5 having a highly accurate shape can be manufactured. When the processing of the rear end 5b of the workpiece A is completed at time t15, the cover opening / closing control unit 75 opens the second cover 200 and stops the processing air blow. Further, the second turning control unit 76 stops the turning of the second chuck 25 and unclamps the workpiece A. The second holder control unit 77 moves the second tool holder 40 to the blow position, and supplies air for discharge to the blow unit 41 at time t16 to eject the air. By this air blow, the workpiece A processed at both ends at time t17 is discharged to the receiving unit 60, and the processing of the workpiece A is completed.

FIG. 10 shows the second tool holder 40 in a state of being moved to the blow position. FIG. 11 shows a state where the workpiece A processed by the blow unit 41 is pressure-fed from the second chuck 25 to the discharge path 23. As shown in FIG. 10, the front end 43 of the blow unit 41 of the second tool holder 40 is set at the rear end 5 b of the workpiece A, and the discharge air 47 is blown out from the blow unit 41. The work A is pressure-fed from the second chuck 25 to the discharge path 23 by the air 47 and further sent to the receiving unit 60. A blow unit 41 is mounted on the second tool holder 40 together with the tool 42. Therefore, the distance to which the tool holder 40 is moved from when the machining by the tool 42 is completed to when the blow unit 41 is set to the blow position is short, and the blow is performed in a short time, for example, 1 second or less. 5 can be discharged.

As described above, in the both-end processing apparatus 1, both ends 5 a and 5 b of the workpiece 5 can be continuously processed by the first processing apparatus 10 and the second processing apparatus 20. For this reason, both-ends processing of one work 5 can be performed in a short time, for example, 10 seconds or less. Furthermore, as shown in FIG. 4, the process in the 1st processing apparatus 10 and the process in the 2nd processing apparatus 20 can be performed partially in parallel. For example, at time t14 when the second machining apparatus 20 starts cutting the rear end 5b of the workpiece A, the first machining apparatus 10 starts supplying the workpiece 5 and starts machining the next workpiece B. it can. Therefore, the both-end processing apparatus 1 can process the workpiece 5 with a pipeline by the first processing apparatus 10 and the second processing apparatus 20, and the processing time (tact time) required for one workpiece 5 substantially. Can be further shortened. For example, it becomes possible to discharge the workpiece 5 processed at both ends at intervals of 5 seconds or less.

FIG. 12 is a flowchart showing a method of manufacturing a product by processing both ends 5a and 5b of the workpiece 5 using the both-end processing apparatus 1. An example of a product is a cylindrical or bar-shaped part such as a shaft or a pipe. First, in step 301, after the supply unit 50 supplies the work 5 to the supply path 13 of the first turning unit 19, the work 5 is pressure-fed through the supply path 13 by air blowing. In step 302, air for position detection is blown out, and the work 5 that has been pressure-fed through the supply path 13 is stopped at the first clamp position P1 by a stopper 31 having a position detection function. In step 303, the first processing apparatus 10 clamps (grips) the workpiece 5 with the first chuck 15, and in step 304, the tip 5 a of the workpiece 5 is processed with the tool of the tool holder 30.

Next, in step 305, the first chuck 15 unclamps the workpiece 5, and in step 306, the pressure feeding unit 52 of the supply unit 50 feeds the workpiece 5 again by air blow. In step 307, the workpiece 5 is stopped at the second clamp position P2 by the stopper 31 having a position detection function. In step 308, the work 5 is clamped again by the first chuck 15.

In step 309, the moving unit 80 moves the second turning unit 21 and the workpiece 5 to the second chuck before or after or in parallel with the steps 305 to 308 for again feeding the workpiece 5 whose tip 5a has been processed. 25 to the second position 82 where it can be gripped. In step 310, the workpiece 5 is transferred from the first chuck 15 to the second chuck 25. Thereafter, in step 311, the moving unit 80 returns the second turning unit 21 to the first position 81. In step 312, the second processing apparatus 20 processes the rear end 5 b of the workpiece 5 clamped by the second chuck 25 with the tool of the second tool holder 40.

Thereafter, in step 313, the second tool holder 40 is moved to the blow position, air is blown out from the blow unit 41, and the workpiece 5 that has been processed at both ends is discharged through the discharge path 23. A program (program product) 74 for controlling the both-end processing apparatus 1 according to a manufacturing method (processing method) including these steps can be provided by being recorded on a recording medium or via a computer network.

In addition, the shape of the tool used for the above-described processing is an example, and the shape in which the workpiece 5 is processed is arbitrary. In the above processing system 1, the moving unit 80 moves the second turning unit 29 of the second processing apparatus 20, but even if the first turning unit 19 of the first processing apparatus 10 moves. Well, you may move both. Which one is moved can be determined in consideration of the connection relationship between the workpiece supply unit 50 and the first turning unit 19 and the connection relationship between the workpiece receiving unit 60 and the second turning unit 29. In the above, the processing time in the first processing apparatus 10 is longer than the processing time in the second processing apparatus 20. Therefore, in the above-described machining system 1, the configuration of the both-end machining apparatus 1 as a whole can be simplified by moving the second turning unit 29, and the processing time (machining time, manufacturing time) can be easily shortened.

Claims

A processing system having a first processing device for processing a short rod-shaped workpiece,
The first processing apparatus includes a first turning unit that grips and turns a workpiece;
A supply path provided along an axis of the first main shaft so as to penetrate the first main shaft of the first turning unit;
A first chuck for gripping a workpiece supplied via the supply path;
A first tool holder for holding a tool for processing a workpiece gripped by the first chuck;
The processing system includes a supply unit that supplies and pressure-feeds a workpiece to the supply path from the side opposite to the first chuck of the first main spindle,
The first tool holder includes a stopper that stops a work that has been pressure-fed through the supply path at a predetermined position protruding from the first chuck.
In claim 1,
The stopper includes a detection hole that blows out gas in a direction facing the workpiece,
The processing system further includes a detection unit that detects a position of the workpiece by blocking air blowing from the detection hole when the workpiece hits the stopper.
In claim 1 or 2,
A second processing device for further processing the workpiece processed by the first processing device;
The second processing apparatus includes: a second turning unit that holds the second chuck at a position facing the first chuck;
A second tool holder for holding a tool for processing a workpiece gripped by the second chuck,
The processing system further includes at least one position of the first turning unit and the second turning unit, a first position where the second chuck is separated from the first chuck, and the second position. And a moving unit that moves relative to a second position for gripping the work gripped by the first chuck as the chuck approaches the first chuck.
In claim 3,
The second processing device includes a discharge path that passes through the second main shaft of the second swivel unit and discharges the processed workpiece from the second chuck along the axis of the second main shaft. ,
The second tool holder includes a blow unit that pressure-feeds a workpiece to the discharge path through the second chuck.
In claim 3 or 4,
A control unit including functions for controlling opening and closing of the first chuck, opening and closing of the second chuck and movement of the moving unit;
The control unit moves the position of the work gripped by the first chuck from the first clamp position processed by the tool held by the first tool holder by the stopper. A processing system comprising a function of changing a position further protruding from a position to a second clamp position for switching from the first chuck to the second chuck.
A method of machining a short rod-shaped workpiece by a machining system,
The processing system includes: a first swiveling unit that grips a workpiece supplied by a first chuck through a supply path provided along an axis of the first main shaft so as to penetrate the first main shaft; And a first processing apparatus including a first tool holder for holding a tool for processing a workpiece gripped by the first chuck;
A supply unit for supplying a work to the supply path from the side opposite to the first chuck of the first spindle;
The method is
The supply unit pumps the workpiece in the supply path;
Stopping the workpiece pressure-fed through the supply path with a stopper mounted on the first tool holder at a predetermined position protruding from the first chuck;
Machining a workpiece gripped by the first chuck with a tool held by the first tool holder.
In claim 6,
The stopper includes a detection hole that blows out gas in a direction facing the workpiece,
The method is
The method further includes confirming the position of the workpiece by hitting the stopper against the workpiece and inhibiting air blowing from the detection hole.
In claim 6 or 7,
The processing system includes a second processing device that further processes the workpiece processed by the first processing device,
The second processing apparatus holds a second turning unit that holds the second chuck at a position facing the first chuck, and a second tool that holds a tool that processes the workpiece gripped by the second chuck. 2 tool holders,
The processing system further includes a moving unit that moves a position of at least one of the first turning unit and the second turning unit,
The method is
The moving unit moves the relative position between the first swivel unit and the second swivel unit, and the second chuck moves from the first position where the second chuck is separated from the first chuck. Moving closer to the first chuck to a second position for gripping the workpiece gripped by the first chuck;
Changing the workpiece from the first chuck to the second chuck;
The moving unit moves a relative position of the first turning unit and the second turning unit from the second position to the first position;
Processing the workpiece gripped by the second chuck with a tool held in the second tool holder.
In claim 8,
The second processing device includes a discharge path that passes through the second main shaft of the second swivel unit and discharges the processed workpiece from the second chuck along the axis of the second main shaft. ,
The method is
The method further comprising: a blow unit mounted on the second tool holder pressure-feeds a processed workpiece through the second chuck to the discharge path.
In claim 8 or 9,
The method is
Furthermore, the position where the first chuck holds the workpiece is a position further protruding from the first clamp position from the first clamp position where the workpiece is processed by the tool held by the first tool holder. And further comprising changing to a second clamping position where the first chuck can be transferred to the second chuck.