JP2753994B2 - Crankshaft cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]   The present invention relates to cutting of a crankpin of a crankshaft and the like.
The present invention relates to a crankshaft cutting machine that performs machining. (Prior art)   When this kind of cutting machine is controlled by NC equipment,
Of the crankshaft (hereinafter abbreviated as “workpiece”)
It is necessary to select NC data suitable for the type.
It is required to determine the type of workpiece before cutting
You.   For this reason, conventionally, a work piece has to be
The type of the work is identified by a suitable work discriminating means.
doing. [Problems to be solved by the invention]   By the way, for example, just before or during cutting
Therefore, when the work type information is lost,
Remove the work from the chuck of the main body and check the type again.
Separately, when this work is later carried into the cutting machine body,
Work efficiency is reduced because
There was an inconvenience.   Also, the work discriminating means was mistaken for some reason.
When the discrimination is performed, proper cutting is not performed,
In some cases, there is a possibility that the cutting means or the like may be damaged.   An object of the present invention is to eliminate such a problem.
You. [Means and actions for solving the problems]   The present invention includes a chuck for fastening a work.
A pair of chuck heads and a chuck for each of the chuck heads;
It has a moving axis along the axis connecting the
And a cutter head that cuts the workpiece with the
In the crankshaft cutting machine, the end face of the work
For discriminating the type of workpiece drilled along the axis of the workpiece
Depth measuring means for measuring the depth of a hole as workpiece identification information
Is disposed on one of the chuck heads,
Depth measuring means is provided between the chucks of the chuck heads.
It is arranged so that it can move forward and backward along the connecting axis,
For centering formed along the opening edge of the discriminating hole
A tapered surface that matches the tapered surface is formed at the tip
A center rod, and a first rod for moving the center rod forward and backward.
Insert the actuator and the work type
The center rod is inserted coaxially and
Sensor rod and a second arm for moving the sensor rod forward and backward.
The taper surface of the actuator and the center rod
Detected that it has joined to the tapered surface for centering
Detecting means, and the center rod
Actuating the first actuator, and
After the detection of the joining, the sensor rod
Actuator for actuating the second actuator
Control means; and a relative change between the center rod and the sensor rod.
And a displacement detecting means for detecting the position.
I have. 〔Example〕   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
You.   As shown in FIG. 1 and FIG.
Rank shaft cutting machine, cutting machine position body 1, crankshaft
Shaft positioning device 20, and crankshaft conveying device
The device 80 is provided.   The cutting machine body 1 comprises a bed 2 and left and right cutter heads 3,
4 and the bed 2 has a left chuck
A head 5 and a right chuck head 6 are provided. this
The chuck heads 5 and 6 are connected to the left chuck head body 5a.
With the left work chuck 7 and the right chuck head body 6a
It consists of a right work chuck 8 and is not shown.
Drive motors are used to move
Is moved. Thereby, the left work chuck 7 and the
And right work chuck 8 as shown by arrows V and W
And move independently on the same axis,
The ends are clamped respectively.   The work chucks 7, 8 are held between them.
Work that supports the center journal of the held work
A rest 9 is fixedly arranged on the bed 2. This work
The rest 9 has an axis connecting the work chucks 7 and 8 and
On a reference plane A that is orthogonal and that is located approximately at the center of the bed 2
It is installed in. The work rest 9 is attached to the bed 2
With the frame 10 fixed and the center journal actually interposed
And a pair of arms 11 and 12 for holding.   As shown in FIG. 11, the left chuck head 5 has
A work discriminating device 300 for discriminating the type of workpiece is provided.
I have. This work discriminating device 300 is
That is, extending along the axis connecting the work chucks 7 and 8 described above.
Center rod 301. And this center
The rod 301 is a hydraulic system fixed to the left chuck head 5.
By the action of Linda 302, it moves back and forth along the above-mentioned axial direction.
Moving. Furthermore, the center rod tip 301a on the right side in the figure
Are formed in a tapered shape.   On the center rod 301, the sensor rod 303 is
It is inserted to move forward and backward along the direction. And this sen
The tip 303a of the salrod 303 is the center rod tip 301a.
Projecting through. These center rod tips 30
1a and the sensor rod tip 303a are both workpiece chucks 7
Through the axis of the chuck body 7a at
It is located between several chuck claws 7b.   The sensor rod 303 is located at the rear end 30 of the center rod 301.
Move forward and backward by the action of the hydraulic cylinder 304 provided in 1b
Be moved. And the cylinder body 304 of the hydraulic cylinder 304
a between the sensor rod 303 and the rear end 303b of the sensor rod 303.
Corresponding to the amount of movement of sensor rod 303 with respect to rod 301
A sensor 305 for generating a number of pulse signals is provided.
You.   Support plate 308 provided on the side of chuck head body 5a
Are for detecting the retraction position of the sensor rod in order from the left in the figure.
Limit switch 310, a switch for detecting the count start position
Mitt switch 311 and center rod retract position detection
Mitt switch 312 and center rod advance position detection
Limit switches 313 are
You.   A guide plate 306 is attached to the sensor rod rear end 303b.
The guide plate 306 includes a chuck head body 5a.
The implanted guide shaft 307 is loosely fitted. And mo
On the id plate 306, a block 320 for urging the LS 310,
The block 321 for urging the LS311 is attached.
You.   The arm is attached to the hydraulic cylinder 304 provided on the center rod 301.
A plate 309 is fixed, and the arm plate 309 is biased with the LS312.
Block 322 and block 323 for energizing the LS313.
And are attached. Each of the above elements 301, 302, ... 323
Thus, the work determination device 300 is configured.   Crankshaft positioning device 20 (hereinafter referred to as positioning device)
2 is located in front of the cutting machine body 1 (lower in FIG. 2).
The left holder 21, the chute plate 22, and the
And right holder 23, and a work transfer path (conveyor)
A work loading cylinder 25 is provided with the
You. As clearly shown in FIG. 3, the left holder 21, the chute
Plate 22 and right holder 23 are installed on slide block 26 respectively
Have been. The slide block 26 is fixed on the floor 27
To the base block 28 via the guide rail 29
It is installed movably along the right direction.   A drive motor 30 is fixed to the base block 28.
I have. The screw shaft 30a of the motor 30 is a slide block.
Screw 26, and thus the rotation of the motor 30
This causes the slide block 26 to move. Above
Left holder 21, right holder 23, slide block 26, and
And the drive motor 30 constitute a work moving means 30 '.
You. The end of the screw shaft 30a has the screw
The amount of rotation of the shaft 30a, that is, the amount of movement of the slide block 26 is
The pulse encoder 31 that generates the corresponding number of pulse signals
Is provided.   On the other hand, at the left end of the slide block 26, a hydraulic
A support plate 3 is provided at the tip of the lot 32a.
3 is fixed. This support plate 33 extends rightward in the figure.
The sleeve 34 is fixedly mounted.
Has a holder block 35 that can be freely moved along the axial direction.
Have been. In the right end of the holder block 35, a cone
36 rotates with respect to the sleeve 34 and the holder block 35
Is provided. This cone 36 has a tapered shape
A recess 37 is formed in which the sleeve is formed.
The distal end 34a of the 34 protrudes. Holder block
A compression spring 38 is interposed between the sleeve 35 and the base 34b of the sleeve 34.
And urges the cone 36 to the right. Pickpocket
The rod 39 is inserted through the end 34a, and its end 39a
Is the rod 40a of the hydraulic cylinder 40 fixed to the support plate 33.
Are connected to each other via a connecting plate 41. Hydraulic syringe above
The rod 39 moves with respect to the sleeve 34 by the operation of the da 40
Make the move.   The rod 39 is positioned between the rod 39 and the support plate 33 in the initial position.
The rod end 39b and the sleeve tip 34a
Rod that detects that the end faces of the
Limit switch 42 (hereinafter referred to as rod LS42)
Have been killed. Further, between the connection plate 41 and the support plate 33
Corresponds to the movement of the rod 39 using, for example, magnetism
The sensor 43 that outputs a predetermined number of pulse signals is provided.
You. The above-described sleeve 34, rod 39, hydraulic cylinder 40,
The connection plate 41, the rod LS42, and the sensor 43 are the types of the workpiece.
Is constituted by a work discriminating means 44 for detecting the above.   The hydraulic cylinder 32 has a hydraulic pressure detecting head pressure.
The sensor 45 is provided. And each component described above,
The left holder 21 is composed of 32, 33,... 45.   On the other hand, at the right end of the slide block 26, a hydraulic
A support plate 47 is provided at the tip of the rod 46a.
The support plate 47 extends leftward in the figure.
The holder block 48 is fixed. This holder block
The bracket 48 is provided on the upper surface on the right end of the slide block 26.
An id block 49 is loosely fitted.
A cone 50 having a pa-shaped recess 51 is rotatably arranged.
ing. Between the support plate 47 and the slide block 26
Detects the position of cone 50 based on operation of hydraulic cylinder 46
Linear potentiometer as a work position detecting means
52 are provided. Each component described above, 46, 47 ... 52
, The right holder 23 is formed.   The chute plate 22, as shown in FIG.
22a is pivotally supported by the slide block 26, and
Of the hydraulic cylinder 55 fixed to the slide block 26
The rod 55a is pin-connected. Therefore, the above oil
By expanding the pressure cylinder 55, the chute plate
22 is the work unloading position shown by the chain line from the normal position shown by the solid line
Tilted to   The work loading cylinder 25 is, as shown in FIG.
A work pressing plate 57 is fixed to the end of the rod 25a.
Between the rear rod 25b and the cylinder body 25c.
The plate 57 moves forward to a predetermined position,
Limit switch 58 (hereinafter, referred to as
(Referred to as carry-in LS58).   As shown in FIG. 4 and FIG.
Work posture correcting means 60 is installed in the area.
A guide rail 62 provided on a wall 61 includes a shift block.
63 is movably supported.
A rod 64 extending downward is loosely fitted. This rod
Fork 65 is fixed at the upper end of 64, and link plate 66 is
The shift plate is fixed to the link plate 66.
The rod 67a of the hydraulic cylinder 67 fixed to the lock 63 fits
Between the end of the rod 67a and the link plate 66.
Nie 68 is interposed. By the operation of the hydraulic cylinder 67,
And the fork 65 is raised as shown by the solid and chain lines in FIG.
Move down.   The shift block 63 includes a hydraulic series fixed to the wall 61.
The hydraulic cylinder 69 is connected to the rod 69a of the
The fork 65 is moved in the horizontal direction in FIG.
If so, the direction of the axis connecting the left holder 21 and the right holder 23
Move along the direction. Also, the wall 61 and the shift block 63
Between, detects the movement amount of the fork 65 and the current position
A linear potentiometer 70 is provided.   As clearly shown in FIG. 1, a crankshaft conveying device
80 (hereinafter, referred to as a transfer device 80) is located above the cutting machine body 1.
In the fore-and-aft direction along A (see FIG. 2)
The guide rail 81 that has been installed and the guide rail 81
And a guide block 82 movably supported.
You. Hydraulic cylinders 83 are mounted on this guide block 82
The support plate 8 is provided at the lower end of the rod 83a.
4 are fixed. At the left end of the support plate 84,
85 is provided. The support plate 84 has a guide lock
A rod 86 is erected, and this rod 86 is used as a guide block 82
It penetrates through the inner projections 87,87. Therefore, the hydraulic series
When the hand 83 is actuated, the hand 85 is indicated by an arrow Y.
Move up and down as shown.   The guide rail 81 is provided with a hydraulic cylinder 88,
The tip of the rod 88a is connected to the guide block 82
I have. Therefore, operating the hydraulic cylinder 88
The guide block 82, in other words, the hand 85
It moves in the front-back direction as indicated by the mark X. Guide rail described above
81, guide block 82, hydraulic cylinders 83, 88 and
The support plate 84 constitutes a hand moving means 80 '.   As shown in FIGS. 7A and 7B, the hand 85 is
And integrated gripping claws 87, 88, these claws 87 and 88,
With reference plane A (see FIG. 2) in cutting machine body 1 interposed
They are arranged at positions symmetrical to each other. Also, nails 87,88
From relative finger members 87a, 87b and 88a, 88b, respectively.
It is configured. The hand 85 is used to open and close the finger members.
For setting the distance between the hydraulic cylinder 89 and the pawls 87 and 88
A hydraulic cylinder 90 is provided.   As shown in FIGS. 8 and 9, each of the finger members 87a, 87
b, 88a, 88b are splines rotatably supported by the frame 86
The shafts 91 and 92 are axially movable and non-rotatably fitted.
ing. In the center of the spline shafts 91 and 92, an arm
The members 93 and 94 are fixedly provided, respectively, and are clearly shown in FIG.
As shown, a taper block 95 is provided between the arm members 93 and 94.
It is arranged. The taper block 95 is connected to the hydraulic cylinder
The rod 89a is fixed to the tip of a rod 89a of the
And extend the taper block 95 from the chain line position to the solid line position.
The arm members 93 and 94 are split open.
The finger members 87a and 87b and the finger members 88a and 88b
Swing from the open position indicated by the chain line to the open position indicated by the solid line
I do. When the taper block 95 is raised,
Finger members 87a and 87b, and
88a and 88b swing from the closed position to the open position, respectively.   As shown in FIG. 9, the rod 96 of the hydraulic cylinder 90 is
It is loosely fitted to the guide portion 86a of the body 86, and its tip 96a has
The shifter block 97 engaged with the finger members 87a (87b) is fixed.
Have been. A shifter is provided at the left end of the main body 90a of the hydraulic cylinder 90.
A block 98 is fixedly mounted, and the shifter block 98 is a finger member.
It is engaged with 88a (88b). The hydraulic cylinder 90 described above,
And shifter blocks 97 and 98 constitute claw moving means 90 '.
doing.   When hydraulic pressure is applied to the hydraulic pressure on the head side of the hydraulic cylinder 90,
87 moves as shown by the arrow J, and the claw 88 moves to the arrow K.
And the gap between the claws 87 and 88 is narrow as shown by the dashed line.
It becomes. Note that even if the claws 87 and 88 move,
7,88 must occupy the target position across reference plane A
Of course.   On the other hand, hydraulic pressure is applied to the bottom oil chamber 100 of the hydraulic cylinder 90.
Move, the claws 87 and 88 move from the chain line position to the solid line position.
You. Block 102a of the rear rod 101 of the hydraulic cylinder 90,
102b is fixed, and the claw 87,88 is the limit switch 103
(Hereinafter referred to as LS103), and the claws 87 and 88 are positioned at the dashed lines.
Block 102b is the limit switch 104 (hereinafter
Below, referred to as LS104).
Is detected.   As shown in FIG. 7 (a), a holding claw 1 is provided between the claws 87 and 88.
05 is provided. The holding claws 105 are as shown in FIG.
The finger members 105a and 105b supported by the frame 86 are supported by support shafts 106a and 10b.
Gears 107a, 107b fixed to 6b and meshing with each other.
With use, it swings between the open positions shown in cooperation. Ma
The side plate 86a and the finger member 105a of the frame 86, and the side plate 86b and the finger
Compression springs 108a and 108b are interposed between the member 105b.
The finger members 105a and 105b are always open.
Biased to position.   FIG. 12 shows the cutting machine body 1 and the crankshaft position.
Control device 20 and the crankshaft transfer device 80
FIG. 2 conceptually shows a control system for performing the control. Fig. 13
A flowchart showing the processing procedure of the controller 150 shown in FIG.
It is a low chart.   As shown in the flowchart, the controller 150
For example, a positioning device is provided by work detection means such as a TV camera 151.
In front of the device 80a, specifically, a plate 57 for pressing the workpiece.
It is always checked whether or not the work has arrived between
(Step 201).   Now, the work 110 on the work transfer path 24 shown in FIG.
(See FIG. 5), and the camera 151
When the work 110 is captured, the work is carried in via the solenoid valve 152.
The cylinder 25 is extended (step 202), thereby
The work 110 slides on the chute plate 22, and as shown in FIGS.
It is located between the left holder 21 and the right holder 23 shown. Soshi
In step 203 by the operation of the loading LS58,
When it is determined that the workpiece will be loaded into the specified position, the workpiece loading cylinder
25 is degenerated (step 204).   Next, shown in FIG. 3 through solenoid valves 153 and 154, respectively.
Hydraulic cylinder 32 according to left holder 21 and right holder 23
And 46 are deactivated (step 205).
The cones 36 and 50 toward one end and the other end of the workpiece 110.
Each is moved.   The pressure sensor 45 shown in FIG.
To detect the pad pressure P.
When the work 110 is sandwiched, the head pressure becomes the preset pressure P_rThan
Will also be higher. Then, in step 206, the head pressure P becomes P_r
If it is determined that the above is true, the retracting operation of the cylinders 32 and 46 is performed.
Is stopped (step 207).
Ends are guided to the center of the cone,
The center axis of the cone coincides with the center axis of cones 36 and 50.   A hole 111 for discriminating the type is drilled on the left end face of the work 110.
Has been established. In step 208, the lock shown in FIG.
The hydraulic cylinder 40 for advance and retreat is extended via the solenoid valve 155.
Be moved. As a result, the swing stroke length of the rod 39,
The number of pulse signals corresponding to the depth of the
Output. Note that when the above pulse signal stops
With this, the end 39b of the rod 39 comes into contact with the end of the hole 111.
You.   In step 209, the pulse signal is stopped in the next step 210.
The signal is counted until it is determined that
Values are not shown as discrimination information for the type of work
Stored in memory.   In this embodiment, two types of workpieces are identified.
In the following, one work is A work and the other work is B work.
Work.   When the work determination is completed, the cylinder 40 is retracted.
(Step 211).
It continues until the return of 39 is judged. The rod 39
Is detected by the rod LS42.   Next, the claws 87, 88 of the hand 85 shown in FIGS.
An interval is determined (step 213). That is, FIG.
The hydraulic cylinder 90 for adjusting the claw spacing shown in FIG.
Actuated through the distance between the claws 87, 88 about the reference plane A
Between the crank pins located across the center journal
Determined by the width.   Note that the distance between the claws 87 and 88 is determined according to the described work determination information.
It is based on information. And the completion of the setting, for example
If the work 110 is the A work, the limit switch 103
In the case of B work, it is set with limit switch 104
Each is confirmed.   After the determination of the claw interval is completed, the cutting machine body
Positioning of the first work chucks 7, 8 is performed (step
214). In other words, the type of work has already been determined
The work 110 is located at the center of the work 110
Motors 157 and 1 so that the journal is in place.
The chuck heads 5, 6 are moved by 58, respectively.
Note that the position of the chucks 5 and 6 can be checked, for example, by using a pulse encoder.
This is performed based on the output pulse of the coder.   In the next step 215, the linear potentiometer shown in FIG.
The position of the cylinder 46 based on the output of the
The position of the cone 50 is detected.
Of the center journal of the work 110 is detected.
Is performed (step 216). That is, the controller 150
Is the output pulse of the pulse encoder 31 shown in FIG.
Based on the position of the slide block 26
In step 216, the slide block 26
Position and cone 50 detected by potentiometer 52
Right end of the workpiece 110 from the reference plane A based on the position
The position is determined, and the right end position and the detected
With respect to the reference plane A based on the type of the workpiece 110
The deviation L of the center journal position of the work 110 is calculated.
Is done. Then, in the next step 217, the calculated displacement
So that the quantity L becomes zero, that is, the position of the center journal
And reference plane A (work rest position)
The slide block 26 is moved by the motor 30.   In the next step 218, the fork 65 shown in FIG.
Positioning is performed. That is, the hydraulic series shown in FIG.
The cylinder 69 is actuated via the solenoid valve 157, thereby
As shown in the drawing, the crank pin 11d of the work 110
Is located below. The position of the cylinder 69 is detected by
Given based on the discrimination information of the work,
Confirmation is made by the potentiometer 70.   Next, the lift hydraulic cylinder 67 shown in FIGS.
Actuated via the magnetic valve 158, which causes the fork 65
As shown in FIGS. 6 (a) and 6 (b),
Corrected posture angle of work 110 (phase angle of crankpin)
(Step 219).   In the next step 220, the workpiece 85 is grasped by the hand 85.
Is carried out. That is, the vertical hydraulic cylinder of the transfer device 80
The damper 83 is extended through the solenoid valve 159.
85 is lowered. Then open the hand shown in Figs.
The closing hydraulic cylinder 89 is actuated via the solenoid valve 160,
As a result, the claws 87 and 88 are closed, and the work 110 is gripped.
You. In step 220, each of the left and right holders 21 and 22 is
The retreat operation of the cylinders 32 and 46 is also executed at the same time.   When the grip of the work 110 is completed, the transfer device 80
The vertical hydraulic cylinder 83 and the front and rear hydraulic cylinder 88
The valve is depressed via magnetic valves 159 and 161 respectively.
The work 110 is conveyed to the cutting machine body 1 by the
Step 221). Then, the pawl opening / closing cylinder 89 operates.
Then, the gripping of the workpiece 110 by the hand 85 is released (
Step 222).   When the grip of the work 110 is released, the center of the work 110 is
With the journal positioned on the work rest 9,
One end and the other end of the work 110 are
Through the upper openings of the jacks 7 and 8 in their chucks
Is dropped.   When the workpiece 110 is dropped into the chucks 7, 8, the eleventh
The type of the workpiece is again determined by the workpiece determination device 300 shown in the figure.
The type is determined (step 223).   Hereinafter, an aspect of the work determination by the determination device 300 will be described as a first example.
This will be described with reference to FIG.   As shown in FIG. 12, first, the cylinder 302 is moved to the position shown in FIG.
Is extended via the solenoid valve 163 (step 223A),
This causes the center rod 301 to move forward (see FIG. 11).
Right). In the next step 223B, the center rod 30
It is determined whether or not 1 has advanced to the specified position.
When the disconnection result is YES, the cylinder 304 is extended.
(Step 223C). At this point, the center rod 301
Is biased rightward, so that the taper of the rod 301
The tip part 301a is in close contact with the workpiece 110.   The sensor rod 303 moves forward with the extension of the cylinder 304.
Is advanced. Then, in the next step 223D, the rod
Position is detected by the limit switch 311
The pulse signal output from the sensor 305 is counted.
(Step 223E), and this count is
The stop is continued until it is determined in the next step 223F.
When the stop of the pulse signal is determined, the count
The memo value is used as the information to determine the type of the work 110.
Stored in the directory. This discrimination information is actually
Indicates the type of the work 110 mounted on the workpieces 7 and 8
Therefore, it can be said that the reliability is extremely high.   After the stop of the pulse signal, the cylinder 30 is retracted.
(Step 223G), this degeneration operation is performed in the next Step 223H.
Continue until it is determined that limit switch 312 is turned on
Is done. When the contraction of the cylinder 302 is completed,
And the next step 304I is performed.
223J determines that the remitcho switch 310 is on.
At this point, the contraction of the cylinder 302 is completed.   The above is the procedure of the work determination by the determination device 300.   After the workpiece is determined in step 223, the chuck
Cylinders 7a and 7 provided on the heads 7 and 8, respectively.
And 8a are activated, whereby the work chuck 7 and
8, both ends of the work 110 are fastened.
Arm 1 of work rest 9 with drive source not shown
1 and 12 are activated and the center journal 110d of the work 110 is
It is clamped by this work rest 9 (step 22
Four).   In the next step 225, the word determined by the
NC machining data is selected for the
The cutting process is executed
The rank pins are sequentially cut. Note that this process is
Both left and right cutter heads 3 and 4 with built-in cutters
Is performed while operating one of them in the directions of arrows V and W.
It is.   When the end of machining is determined in step 226,
The work is fastened by the work
Work clamp is released (step 227).
Thus, the processed work 110 is gripped by the hand 85.
The work 110 is moved by the hand 85 to the chute plate 2.
It is conveyed to the top (Step 229). Then solenoid valve 162
The chute line pressure cylinder 55 shown in FIGS.
Is activated, whereby the sheet plate 22 is operated and processed.
The only work 110 is moved onto the transport path 24.   In this example, two types of work, A work and B work, are used.
The example of loading and unloading of work
Movement of the nails 87 and 88
Detecting with analog sensors such as meters
For various types of workpieces with different crank pin intervals
Needless to say, the present invention can be applied to this.
No. 〔The invention's effect〕   According to the present invention, when the workpiece is mounted on the chuck,
Since the type of the work can be determined,
Work type information is lost or incorrect due to
Do not move the workpiece after repairing a power failure, etc.
The type of spider can be determined,
Work efficiency can be improved.   In addition, the type of work can be identified just before cutting.
Therefore, by performing NC machining based on the discrimination information,
Accurate machining without erroneous cutting becomes possible.   Further, according to the present invention, the protrusion length of the sensor rod is
The workpiece is set shorter than the depth of the
Even if the axis of is shifted from the axis of the center rod,
To minimize damage and deformation of the rod projection
Can be.   Of course, advance the center rod with the above protruding length set to zero.
It is also possible to make the two tapered surfaces
Sensor rod is centered after centering by joining
The sensor rod will protrude from the rod,
And smoothly inserted into the work type discriminating hole.   It should be noted that, in the present invention, the work is
It is also effective when mounting. That is, the operator
Even if the type of work cannot be determined from the appearance of the work,
Is it easy to just drop the work into the chuck?
The work type without fail and send it to the NC controller.
Can give information. Of course, in this case,
Detects that the work has fallen into the work chuck
An appropriate sensor is provided, and the sensor
The work discriminating device performs the discriminating operation when the detection is made.
Will be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual side view of a crankshaft cutting machine according to the present invention, FIG. 2 is a conceptual plan view thereof, and FIG. Area view,
FIG. 4 is a side longitudinal sectional view of the same, FIG. 5 is a broken front view of the crankshaft posture correcting means, and FIGS. 6 (a) and (b).
7A and 7B are cross-sectional views showing a change in posture of the crankshaft by the crankshaft posture correcting means, FIGS. 7A and 7B are a front view and a side view of the hand in the crankshaft conveying device, and FIG. FIG. 9 is a horizontal cross-sectional view of a main part of the hand, FIG. 10 is a vertical cross-sectional view of a main part showing a holding claw of the hand, and FIG.
FIG. 12 is a block diagram conceptually showing a control system for controlling each device, and FIG. 13 is a flowchart showing a processing procedure in the control system.
FIG. 14 is a flowchart showing a processing procedure in the work discriminating apparatus. 1 cutting machine body, 5 left chuck head, 6 right chuck head, 7 left work chuck, 8 right work chuck, 9 work rest, 20 crankshaft positioning device, 21 Is a left holder, 22 ... chute plate, 23 ... right holder, 30 ... hydraulic cylinder, 30 ... work moving means, 44 ... work discriminating means, 52 ... linear potentiometer, 80 ... crankshaft conveying device, 80 '
... hand moving means, 85 ... hand, 87, 88 ... gripping claw, 90 '... claw moving means, 150 ... controller, 300 ...
… Work discriminating device, 301… Center rod, 302… Sensor rod, A… Reference plane.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23B 5/18 B23Q 17/00

Claims (1)

(57) [Claims] A crank having a pair of chuck heads each provided with a chuck for fastening a work, and a cutter head having a moving axis along an axis connecting the chucks of the chuck heads and cutting the work by a built-in cutter. In the shaft cutting machine, a depth measuring unit that measures the depth of a work type determination hole drilled from an end surface of the work along an axis of the work as work determination information is provided on one of the chuck heads. The depth measuring means is disposed so as to be able to advance and retreat along an axis connecting the chucks of the chuck heads, and a centering taper formed along an opening edge of the work type determination hole. A center rod having a tapered surface having a shape conforming to a surface formed at a distal end thereof; a first actuator for moving the center rod forward and backward; A sensor rod coaxially and reciprocally inserted into the center rod to be inserted into the hole for discriminating the type; a second actuator for moving the sensor rod forward and backward; and a taper surface of the center rod for centering the workpiece. Detecting means for detecting that the rod has joined to the surface; operating the first actuator so that the center rod advances; and detecting the joining by the detecting means, the second actuator so that the sensor rod advances. A crankshaft cutting machine comprising: an actuator control means for operating the above actuator; and a displacement detecting means for detecting a relative displacement between the center rod and the sensor rod.