JPS63114803A - Delivery carriage device for bar turner - Google Patents

Abstract

PURPOSE:To aim at improvement in operation efficiency, by attaching mutually paralleled racks tight to each of upper and lower chuck jaws shiftable for opening or closing in both vertical directions symmetrically, engaging them with both sides of a pinion, and setting both upper and lower spacing positions of these chuck jaws by rotation of the pinion. CONSTITUTION:Racks 28 and 29 are tightly attached to each of upper and lower chuck jaws 20 and 25 holding a work W through cylinders 17 and 18. Each of these racks 28 and 29 is set up at both sides of a pinion 32, and these chuck jaws 20 and 25 are moved to the work W simultaneously and symmetrically up and down by rotation of this pinion 32. A turning angle detector 34 is tightly attached to a pinion shaft, and this shaft is connected to a control mechanism 37 via a selector mechanism 36. Therefore, since an opening position and a clamping position of these chuck jaws 20 and 25 are alterable in line with a diameter of the work W, the efficiency of arrangement changing work at the time of a diameter change of the work is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transfer carriage device for a bar turner that continuously turns the outer periphery of a long rod-shaped workpiece.

(Prior art and its problems) First, the overall structure of a general bar turner will be briefly explained using FIG. is sent forward, and the outer periphery of the workpiece W is continuously turned by the rotating cutter part 52.

The carry-out carriage device 1 is disposed in front of the cutter part 52, and when it detects that the intrusion end of the workpiece W comes off the detection part 55, the workpiece W is removed by upper and lower chuck claws before it comes off the feed roller Hti151. It is designed to grab and pull it forward.

In such an unloading carriage device, in order to prevent the center of the workpiece from shifting even if the diameter of the workpiece is changed, conventional methods such as Utility Model Application Publication No. 61-68801 and Utility Model Publication No. 50-45130 have been used.
A type of chuck has been developed in which the upper and lower chuck jaws always move symmetrically with respect to the center of the workpiece.

However, when the diameter of the workpiece is changed, with conventional unloading carriage devices, the opening and tightening positions of the chuck jaws must be adjusted by directly operating the adjustment mechanism inside the device, which makes setup changes difficult. It's very time consuming.

In order to improve the efficiency of setup changes, it is possible, for example, to always adjust the open position of the chaff claws to the maximum allowable diameter (for example, 60 sφ), but if this is done, the following problems will occur. i.e. small diameter (e.g. 20a
When machining a workpiece (g + φ), the movement stroke of the chuck jaw between the open position and the tightening position becomes unnecessarily long, and the tightening of the chuck jaw takes time to operate.
Work speed decreases. Particularly today, the feed speed of the workpiece has been increased from the conventional approximately 10 m/min to approximately 50 m/min, and prompt opening and closing operations of the chuck jaws are required.

(Means for Solving the Problems) In order to solve the various problems of the conventional example described above, the present invention arranges a pair of upper and lower chuck jaws at symmetrical positions with respect to the center line of a rod-shaped workpiece, and uses a chuck drive device to Both the upper and lower chuck jaws can be opened and closed symmetrically in the vertical direction, and racks parallel to each other are fixed to each chuck jaw, and both racks are engaged with both sides of the pinion, and a rotation angle detector is connected to the pinion. , a switching angle setting and switching mechanism is connected to the control mechanism of the drive device, and the switching mechanism is connected to a rotation angle detector, and the switching mechanism adjusts the opening and tightening positions of the chuck jaws according to the diameter of the workpiece. I'm trying to set it up.

(Example) Longitudinal cross-sectional view of an unloading carriage device to which the present invention is applied (No. 4
In FIG. 1, which shows an enlarged cross-sectional view taken along line I-I in the figure, a mounting frame 1 is provided with a pair of vertical guide rails 2 on the left and right and a horizontal guide rail 3 for preventing lateral vibration. 2.3 is the lower frame 7 via the rotating roller 6.
is supported so as to be movable in the front and rear directions. Lower frame 7
Four stays 8 extending upward are fixedly attached to the upper frame 10, and an upper frame 10 is fixedly attached to the upper end of the stays 8. A ball screw holder 12 is fixed to the lower surface of the lower frame 7 via a bracket 11, and the ball screw holder 12 is screwed into a lead screw 15 via a ball. The lead screw 15 extends in the front-rear direction and is operatively connected to a suitable drive mechanism, and the rotation of the lead screw 15 moves the carry-out carriage device in the forward direction.

An upper cylinder 17 is fixed to the upper surface of the central part of the upper frame 10 via an upper block 16, and a rod 19 of the upper cylinder 17 extends downward to connect to a lower bush 2.
3 is fitted. An upper chuck claw 20 is fixed to the lower end of the upper rod 19 via an upper chuck holder 21.

On the other hand, a lower block 22 is provided on the lower surface of the center of the lower frame 7.
A lower cylinder 18 is fixedly attached through the lower cylinder 18, and an O-rad 24 of the lower cylinder 18 extends upward and fits into a lower bushing 27. A lower chuck claw 25 is fixed to the upper end of the lower rod 24 via a lower chuck holder 26.

The upper and lower chuck jaws 20.25 are arranged vertically symmetrically with respect to the workpiece center O, and the upper and lower hydraulic cylinders 17.18 are respectively connected to the hydraulic control mechanism 37 via oil pipes 61.62, and the control mechanism 37, both the upper and lower chuck jaws 20.25 are simultaneously moved vertically symmetrically with respect to the center of the workpiece.

A vertical stay plate 38 is fixed to a portion of the frame 7.10 to the left of the chuck jaws 20.25, and the shaft portion of a pinion 32 is rotatably supported on the stay plate 38 via a bearing 31. A rotation angle detector (pulse generator) 34 is fixed via a 7 lange 33, and the input shaft of the rotation angle detector 34 and the pinion 32
The shaft portion is connected to the shaft portion through a joint 35. The rotation angle detector 34 is connected to a switching mechanism 36, and the switching mechanism 36 is connected to the control mechanism 37. Rotation angle detector 3
4 is an absolute type, and the absolute rotation angle of the pinion 32 is detected by the rotation of its input shaft, and is input to the switching mechanism 36 by a pulse signal.

In Fig. 2 showing the ■-■ cross section of Fig. 1, pinion 3
A vertical lower rack 29 and an upper rack 28 are engaged with each other on the front and rear sides of the rack 2, and the lower rack 29 has its lower end fixed to the lower chuck holder 26, and the upper rank 28 has its upper end Upper chuck holder 2
It is fixed at 1. That is, the pinion 32 rotates due to the opening and closing operations of both chuck jaws 20.25, and both rank 2
8.29 is engaged with one pinion 32, so that both chuck claws 20, 25 are always maintained in vertically symmetrical positions.

FIG. 3 shows a hydraulic circuit diagram of a control am mechanism, in which the control mechanism 37 includes a plurality of parallel solenoid valves 41, and each rod 19 .24 is extended and both chuck claws 20,
25 in the closing direction, and conversely, by moving the solenoid valve 41 in eight directions from the neutral state, each rod 19.
24 and moves both chuck claws 20 and 25 in the opening direction. 40 is a hydraulic pump.

In order to start operating the solenoid valve 41 from the neutral state in the inward direction or in the B direction at a desired time, the solenoid valve 41
A detection unit 55 and a proximity switch 56 are connected to. And the desired open position and tightening is at the position of the solenoid valve 4.
1 to the neutral state, the switching mechanism 36 controls the control mechanism 37.
It is connected to the.

That is, as shown in FIG.
When it detects the passing of the rear end of the work W, it issues a command to the controller 137 to move the solenoid valve 41 in Fig. 3 in the direction of the arrow, and move the chuck jaws 20.25 in the closing direction. It is designed to let you do so. The front proximity switch 56 is disposed at the front of the mounting frame 1 as shown in FIG. 4, and the carriage device! When K reaches the position of the front proximity switch 56, the movement of the carriage device is stopped, and a command is issued to the control mechanism 37 in FIG. 25
It is supposed to open and work.

The switching mechanism 36 sets a desired rotation angle in response to the input signal from the rotation angle detector 34, and controls the rotation angle at the set angle.
1 mechanism 37 can be returned to a neutral state. That is, the switching mechanism 36 detects the set rotation angle of the same position in the opening operation of the chuck jaws 20.
4 is detected, the electromagnetic solenoid valve 41 is turned OFF to return to the neutral state, and conversely, when the detection unit 34 detects the set tightening position in the closing operation of the chuck jaws 20.25, the electromagnetic solenoid valve 41 is turned OFF. so that the electromagnetic solenoid valve 41 is returned to the neutral state.

In FIG. 4, a rear proximity switch 57 is disposed at the rear of the mounting frame 1, and is configured to stop the carriage device K when the carriage device K comes to the position shown by the solid line.

(Function) For example, if the diameter of the workpiece to be machined is 50 -, when the distance between both chuck jaws 20.25 is about 55, the cylinder 17.
The opening position of the switching mechanism 36 is set so as to stop the same operation of the cylinders 17 and 18, and the tightening position of the switching mechanism 36 is set so that the closing action of the cylinders 17 and 18 is stopped when the interval is slightly smaller than 50 m. do.

The feed roller device shown in Figure 4! 51, while the workpiece W is being gripped and sent out, the unloading carriage device @ is in the position shown by the solid line, and the upper and lower chuck jaws 20 and 25 in Fig. 1 are vertically separated from the workpiece W by 2.5 mm. rotation d
is maintained. In this state, the entire circumference of the workpiece W is cut by the rotating cutter part 52 shown in FIG.

When the rear end of the workpiece W is removed from the detection unit 55, the solenoid valve 41 of the control mechanism 37 shown in FIG. 25 to grasp the workpiece. Along with this movement, the pinion 32 in FIG.
When the rotation detector 34 detects the set tightening position, the switching mechanism 36 operates and the solenoid valve 41
Return to the neutral state and hold the chuck jaws 20.25 at the set tightening position. Also, both racks 2 are attached to one pinion 32.
8.29, the upper and lower chuck claws 20.25 move accurately symmetrically with respect to the center line 0 of the workpiece W, and the center of the workpiece does not shift.

After that, the lead screw 15 shown in FIG. 1 rotates to move the carriage device K forward, and the workpiece W is carried out from the cutter part 52 shown in FIG. Stop at the position of the line. Furthermore, due to the action of the proximity switch 56 at the front, the solenoid valve 41 in FIG.
The chuck jaws 20.move in the direction of arrow B in the figure.
25 starts the opening operation. In this opening operation, the pinion 32 shown in FIG. 2 rotates in the P direction, and when the detector 34 shown in FIG. return to neutral position. That is, both chuck jaws 20.25 are spaced apart from each other by 55j11.
Stop at the same position.

Next, in the open state, the carriage device returns to the position shown by the solid line in FIG. 4, stops at the position shown by the solid line by the action of the proximity switch 57 at the rear, and waits for the next workpiece to be supplied. Note that the workpiece transported forward by the carriage device 1fK is pushed out by the next workpiece supplied later.

Next, when processing a workpiece having a diameter of 16IM1, for example, the angle set by the switching mechanism 36 may be changed to suit the workpiece. For example, the opening position is set so that the opening operation is stopped when the interval between the chuck claws 20.25 is 21 am, and the tightening position is set so that the closing operation is stopped when the interval is slightly smaller than 16M1.

(Another Embodiment) The present invention is a chuck jaw drive device developed in U.S. Pat.
It can also be applied to an unloading carriage device such as -68801 that has a common cylinder for the upper and lower chuck jaws.

(Effects of the Invention) As explained above, according to the present invention: (1) The upper and lower chuck jaws 20 and 25 are interlocked and connected via a rack and pinion mechanism so that they move symmetrically with respect to the center SO of the workpiece W. Therefore, the workpiece W can be chucked without shifting the center of the workpiece W during tightening, and it is therefore possible to prevent scratches caused by the bite during chucking.

(2) Connect the rotation angle detector 34 to the pinion 32, connect the switching angle setting and switching mechanism 36 to the control mechanism 37 of the drive device, connect the switching mechanism 36 to the rotation angle detector 34, and connect the switching mechanism 36 to the rotation angle detector 34. The opening position and tightening position of the chuck jaws 20.25 can be changed according to the diameter of each workpiece by the operation, so it is possible to change the setup when changing to a workpiece with a different diameter. There is no need to manually adjust the chuck jaw stopper, etc., and the efficiency of setup changeover work is dramatically improved.

(3) Since the open position of the chuck jaws 20 and 25 can be easily adjusted, for example, when changing from a workpiece with a large diameter to a workpiece with a small diameter, the rotation of the chuck jaws leaves a small gap with respect to the workpiece diameter. Can be easily set in position.

In other words, the open position of the chuck jaws 20.25 can be easily set at a position with a slight gap from the diameter of the workpiece, thereby shortening the chucking and releasing operations by the chuck jaws 20.25, achieving efficient work speed. can.

(4) The vertical movement of the chuck jaws 20, 25 is converted into a rotation angle via the rack 28, 29 and pinion 32, and the rotation angle is detected to set the open position and tightening position of the chuck jaws. Therefore, the setting range of the open position and the like can be widened without increasing the size of the rotation angle detector 34, and it is possible to prevent the device from increasing in size.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the carry-out carriage device according to the present invention (I-I section view in FIG. 2), and FIG. 2 is a cross-sectional view taken along II-II in FIG.
3 is a hydraulic circuit diagram of the control tl11 mechanism, and FIG. 4 is an overall side view of the converter equipped with the unloading carriage device of FIG. 1. 17.18... Hydraulic cylinder (drive device), 20.25... Chaff claw, 28.29...
・Rack, 32... Pinion, 34... Rotation angle detector, 36... Switching mechanism, 37... Control mechanism Fig. 2

Claims (1)

[Claims] A pair of upper and lower chuck jaws are arranged in symmetrical positions with respect to the center line of the rod-shaped workpiece, and both the upper and lower chuck jaws can be opened and closed symmetrically in the vertical direction by a chuck drive device, and racks parallel to each other are attached to each chuck jaw. At the same time, both racks are engaged with both sides of the pinion, a rotation angle detector is connected to the pinion, a switching angle setting and switching mechanism is connected to the control mechanism of the drive device, and the switching mechanism is connected to the rotation angle detector. 1. A transfer carriage device for a bar turner, characterized in that the opening position and the tightening position of the chuck jaws are set according to the diameter of the workpiece by a switching mechanism.