JPH0349810A - Work machining device - Google Patents

Abstract

PURPOSE:To simplify a device by decentering a spindle shaft vertically with the turning of an eccentric sleeve and corresponding to with the movement of a work unit in the case that the work hole of one part of a work is made eccentric vertically to the hole of the other part. CONSTITUTION:A disc 21 is fixed to the rear end part of an eccentric sleeve 8 and an arm 22 to the disk 21, an engaging hole 23 is provided at the tip part of the arm 22, a fitting hole 25 is provided on a unit main body 5 and a case 26 is fitted to the specific hole 25. A pin 27 is stored in the case 26, the eccentric sleeve 8 is turned with a lever 24 and the pin 27 is inserted into the engaging hole 23. The shaft center l1 of a spindle shaft 9 is moved by drawing a circular arc l3 centering around the shaft center l4 of the eccentric sleeve 8 and the position of the shaft center l1 is moved in the vertical direc tion. At this time when the position of a work W to a pallet P is changed in accordance with the movement of the shaft center l1 in the right and left directions as well, the work part by a 2nd work unit U2 is slipped and so the 2nd work unit U2 is adjusted by moving it fore and aft.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an orthogonal two-axis type workpiece processing device.

(Prior Art) An apparatus disclosed in Japanese Utility Model Application Laid-Open No. 158749/1983 is known as an apparatus for processing a workpiece from a direction perpendicular to the workpiece.

This workpiece processing apparatus consists of a pair of processing units, and the axes of the spindle shafts of the respective processing units are orthogonal when viewed from the side, so that the workpiece can be processed from different directions.

(Problems to be Solved by the Invention) The conventional apparatus described above cannot cope with cases where the shape of the workpiece is the same but the part to be machined is different due to model changes, etc., and a new processing apparatus must be manufactured. However, problems remain in terms of cost and manufacturing time.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a workpiece processing device consisting of a pair of processing units, in which each processing unit is movable forward and backward with respect to the workpiece, and the spindle axis of each processing unit is The axes were orthogonal in plan view or side view, and the spindle shaft of one processing unit was rotatably supported within an eccentric sleeve, and the eccentric sleeve was rotatably attached to the processing unit body.

(Function) If the position of one of the machined holes in the workpiece becomes eccentric in the vertical direction with respect to the other hole due to a model change, rotate the eccentric sleeve according to the amount and The axis of the spindle shaft of the processing unit is eccentric in the vertical direction.

When the tool interval between the pair of machining units widens or narrows due to the rotation of the eccentric sleeve, the other machining unit is moved forward or backward relative to the workpiece in order to correct this.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall plan view of the workpiece processing apparatus according to the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, FIG. 3 is a sectional view of the first processing unit, and FIG. 4 is the same as that of FIG. 5 is a sectional view of the second processing unit, and FIG. 6 is a front view of the pallet.

The workpiece processing device is provided with a first processing unit Ul and a second processing unit U2 on a base 1, and a chip processing device 2 is installed at a position away from the base 1. A duct 3 is passed between the tables 1, and chips generated during machining are removed through the duct 3. Further, a pallet P for holding a workpiece W is fixed on the base 1.

The first processing unit U1 has a unit main body 5 engaged with a rail 4 provided on a base 1, and moves forward and backward relative to the workpiece W by the operation of a cylinder unit 6.

A through hole 7 is formed in the unit body 5 in the axial direction, an eccentric sleeve 8 is rotatably inserted into the through hole 7, and a spindle shaft 9 is rotatably supported within the eccentric sleeve 8. A tool holder 10 is attached to the tip of the tool 9 via a quick change adapter, and a cutting blade 11 is attached to this tool holder 10. Further, a pulley 12 is connected to the rear wheel of the spindle shaft 9, and a cutting water supply vibrator 14 is connected via a rotary joint 13, and a pulley 16 rotated by a motor 15 attached to the unit main body 5 and a pulley 16 rotated by a motor 15 attached to the unit body 5, A belt 17 is stretched between the belts 12 and 12 to rotate the spindle wE9. Although not shown, the belt 17 is constantly pushed by a tension pulley and is stretched with a constant tension even if the distance between the pulleys 12 and 16 changes.

Further, the eccentric sleeve 8 is positioned at an arbitrary rotational position by a positioning mechanism 20. The positioning mechanism 20 has a disk 21 fixed to the rear end surface of the eccentric sleeve 8, an arm 22 fixed to the disk 21, an engagement hole 23 formed at the tip of the arm 22, and a lever 24 attached thereto. Attachment holes 25 are formed at approximately 15° intervals on the outer periphery of the rear end of the case 26, 26, etc., as shown in FIG. is installed. Inside each case 26 is pin 2.
7 is urged in the protruding direction by a spring 28 and stored, the rear end of the pin 27 is connected to a knob 29, and by pulling the knob 29, the pin 27 is retracted.

Then, with the pin 27 retracted, hold the lever 24 and rotate the eccentric sleeve 8 about 90' from one case 26 to the other case 26, and insert the pin 27 into the engagement hole 23 of the arm 22. As a result, the axis 11 of the spindle shaft 9 follows a circular arc locus 3 with the axis IL4 of the eccentric sleeve 8 as the center.
, and the axial center position of the spindle shaft 9 is Ai.
Switch from seed to 85 seed position.

Further, around the disk 21, a mounting hole 21b for mounting another operating arm 22' is located at a position of 15° x n+α (n is an integer, α minus 15°) with respect to the mounting hole 21a of the operating arm 22. is formed.

By doing this, it is possible to deal with model C, which has a smaller amount of eccentricity than model A.

Further, the first processing unit U1 includes a hydro chuck mechanism 30 and a toggle chuck mechanism 4o. Here, in Fig. 3, the toggle chuck mechanism 4 is shown for the sake of clarity.
0 is shown as being provided on the upper part of the unit main body 5, but in the actual device, a pair is provided on the left and right as shown in FIG.

The pidro chuck mechanism 30 includes a portion forming a space between the through hole 7 formed in the unit body 5 and the eccentric sleeve 8, and an elastic annular member 31 attached to the inner periphery of the through hole 7 in the portion. , an airtight pressure chamber 32 is formed between this elastic annular member 31 and the inner periphery of the through hole 7, and this pressure chamber 32
Hydraulic oil is supplied and discharged through the oil hole 33.

By supplying hydraulic oil to the pressure chamber 32, the elastic annular member 31 is expanded inward and the outer periphery of the eccentric sleeve 8 is tightened and locked.

Further, the toggle chuck mechanism 40 has a space 41 formed in the unit main body 5, and an arm 43 is swingably supported in this space 41 by a shaft 42, and the tip of the short part extending rearward of the arm 43 is attached to the disc 21. The bottle 44, which is urged inwardly by a spring, is brought into contact with the outer surface of the tip of the long portion extending forward, and the piston rod 46 of the hydraulic cylinder unit 45 is brought into contact with the inner surface of the tip of the long portion. There is. As the arm 43 swings counterclockwise in FIG. 3 about the shaft 42 by the pin 44, the eccentric sleeve 8 is pulled rearward (to the right in FIG. 3) via the disk 21, and the eccentric sleeve Flange portion 8a provided at the tip of 8
The eccentric sleeve 8 is locked in the axial direction by strongly pressing the back side of the unit body 5 against the stepped portion 5a of the unit body 5. Further, by supplying hydraulic oil to the oil chamber 47 of the hydraulic cylinder unit 45, the piston rod 46 is caused to protrude, thereby swinging the arm 43 clockwise and releasing the locked state.

In this manner, the circumferential and axial eccentric sleeves 8 are firmly locked by the hydro chuck mechanism 30 and the toggle chuck mechanism 40, thereby preventing the spindle shaft 9 from shifting during the machining operation.

On the other hand, the second processing unit U2 has a unit main body 51 slidably engaged with a rail 50 provided on the base 1, and a ball screw 5 mounted on the base 1 parallel to the axial direction of the processing unit U2.
2 is rotatably mounted, the nut part 53 of the unit main body 51 is screwed onto the ball screw 52, and the ball screw 52 is rotated by a servo motor 54 attached to the base 1, so that the unit main body 51 can be moved relative to the workpiece W. I try to move forward and backward.

A through hole 55 is formed in the unit body 51 in the axial direction, and a spindle shaft 56 is rotatably supported within the through hole 55 via a bearing.

Here, the axis 11 of the spindle shaft 9 of the first processing unit U1 and the spindle shaft 56 of the second processing unit U2
It intersects perpendicularly with the axis 12 in a plan view, and is vertically shifted as shown in FIG. 6 in a front view. In FIG. 6, an imaginary line J23 indicates the axis L of the spindle shaft 9 when the eccentric sleeve 8 of the first processing unit U1 is rotated.
This is the trajectory of No. 1.

A tool holder 57 is attached to the tip of the spindle shaft 56 via a quick change adapter, a cutting blade 58 is attached to the tool holder 57, a pulley 59 is fitted to the rear end of the spindle shaft 56, and a rotary The cutting water supply vibro 1 is connected via a joint 60, and a belt 64 is stretched between the pulley 59 and a pulley 63 rotated by a motor 62 attached to the unit body 51, so as to rotate the spindle shaft 56. I have to.

Next, the pallet P will be explained based on FIGS. 2 and 6.

An open lower 0 is formed in the center of the pallet P, from which the tool holder 10 of the first processing unit U1 faces.
Clamp cylinders 71 . . . are arranged around the pallet P, and the clamp cylinders 71 .

On the other hand, a pallet fixing jig 73 is erected on the base 1, and the pallet P moving on the rails 74 is fixed to this pallet fixing jig 73. That is, on the front surface of the pallet fixing jig 73, there is a guide bar 75 that projects forward.
75 and pallet P to this guide bar 75.75.
The pallet P is positioned by engaging a guide hole 76 provided in the pallet P.

Further, the pallet fixing jig 73 is provided with a shift mechanism 80 for shifting the pallet P in the front-rear direction indicated by the arrow S in FIG. This shift mechanism 80 is a pallet fixing jig 7
Cylinder units 81 are provided at four locations on the front side of the pallet P, and the piston rods 82 of the cylinder units 81 are made to pass through holes 83 formed in the pallet P and protrude toward the front of the pallet P, and a clamp claw 84 is attached to the front end of the cylinder unit 81. , further hole 8
3, a shift amount adjustment collar 85 is attached to one end of the shift amount adjusting collar 85 so as to be replaceable. Further, on the front side of the pallet P, a protrusion 86 and a work reference seat 87, which the tip of the clamp claw 84 comes into contact with when the shift cylinder unit 81 is compressed, are placed on the back side of the pallet P and the front side of the pallet fixing jig 73 for pallet positioning. Reference seats 88 and 89 are provided.

Furthermore, a proximity switch 90 for confirming the shift of the pallet is provided on the side of the pallet P, and a dog 91 for turning on/off the proximity switch 90 is attached to the side end of the pallet P.

The operation of the workpiece processing apparatus having the above configuration will be described below.

First, with the first and second processing units Ul and U2 retracted, the pallet P on which the workpiece W is attached is inserted into the guide bar 75 of the pallet fixing jig 73 and positioned. Next, the cylinder unit 81 of the shift mechanism 80 is caused to make a protruding motion so that the stepped portion of the piston rod of the cylinder unit 81 comes into contact with the adjustment collar 85, and the pallet P is shifted in the direction of the arrow S. This shift is performed to prevent the blade 58 attached to the tool holder 57 from hitting the small diameter portion of the work W when the tool holder 57 of the second processing unit U2 is advanced and inserted into the work W. . Therefore, the shift amount is sufficient as long as the blade 58 does not hit a part of the workpiece W.

After the workpiece W has been shifted as described above, the first and second processing units Ul and U2 are moved forward, and each processing unit U1. Insert the tool holder 10.57 of U2 into the workpiece W, then compress the shift cylinder unit 81, press the clamp claw 84 against the protrusion 86,
Further, the pallet P is firmly fixed to the pallet fixing jig 73 by bringing the reference seats 88 and 89 into contact with each other. In this state, a predetermined blade among the blades 11.58 attached to the tool holder 10.57 is in contact with the part of the workpiece W to be machined.

Then, in the above state, the spindle shafts 9 and 56 are connected to the motor 1.
5 and 62 to rotate and cut the part to be machined. In addition, if there are multiple parts to be processed, the processing unit Ul,
It may also be done by moving U2 forward or backward.

In addition, when the positions of the parts machined by the first and second machining units Ul and U2 change relative to each other due to a model change, for example, the hole W1 of the workpiece W cut by the first machining unit U1 is When the positioning pin 27 of the first processing unit U1 is eccentric in the vertical direction with respect to the hole W2 of the workpiece W to be cut by the first processing unit U2, the positioning pin 27 of the first processing unit U1 is formed on the arm 22 of the positioning mechanism 20. Pull it out from the engagement hole 23, grab the lever 24, rotate the eccentric sleeve 8 by a predetermined angle (15° intervals), move the axis 1 of the spindle shaft 9 to a predetermined height position, and then set the positioning pin 27 at that position. Before engaging the engagement hole 23 and rotating the eccentric sleeve 8 by a predetermined angle, the hydro chuck mechanism 30 and the toggle chuck mechanism 40 are unlocked.

When the positioning of the eccentric sleeve 8 is completed in this manner, the eccentric sleeve 8 is locked relative to the unit body 5 in the circumferential direction and the axial direction by the hydro chuck mechanism 30 and the toggle chuck mechanism 40.

Here, the locking order of the eccentric sleeve 8 is performed as follows. That is, when the eccentric sleeve 8 is rotated relative to the unit body 5 and stopped at a predetermined position, since there is a minute gap between the eccentric sleeve 8 and the unit body 5, the eccentric sleeve 8 sinks due to its own weight after stopping. . Then, wait until this sinking disappears, and then lock it with the hydro chuck [30]. Here, since the elastic annular member 31 of the hydro chuck mechanism 30 deforms in accordance with the sinking of the eccentric sleeve 8, it is convenient to wait for the sinking and then lock.

Further, when the axis f11 of the spindle shaft 9 of the first processing unit U1 is changed in the vertical direction, the position 1 is changed in the horizontal direction as well, and the mounting position of the workpiece W on the pallet P is changed accordingly. , the left-right position of the machined part cut by the second processing unit U2 is shifted with respect to the blade 58 of the second processing unit U2.

In this case, the position of the second processing unit U2 is adjusted by rotating the ball screw 52 with the servo motor 54 and moving the second processing unit U2 forward or backward.

(Effects of the Invention) As explained above, according to the present invention, even if the processing position is changed due to a change in model, etc., the position of one processing unit constituting the processing device can be changed without changing the processing device. This is advantageous in terms of cost, and it is also advantageous in terms of space since there is no need to prepare different devices for each model.

[Brief explanation of drawings]

FIG. 1 is an overall plan view of the workpiece processing apparatus according to the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, FIG. 3 is a sectional view of the first processing unit, and FIG. 4 is the same as that of FIG. FIG. 5 is a sectional view of the second processing unit, and FIG. 6 is a front view of the pallet. In addition, in the drawing, 1 is the base, 5 and 51 are the processing unit main bodies, and 8
is eccentric sleeve, 9.56 is spindle shaft, 10.57
is a tool holder, 20 is a positioning mechanism, 30 is a hydro chuck mechanism, 40 is a toggle chuck mechanism, Ul, U
2 is a processing unit, and W is a workpiece.

Claims (1)

[Claims] In a workpiece processing device consisting of a pair of processing units with a processing tool holder attached to the tip of the spindle shaft,
The pair of machining units are movable forward and backward relative to the workpiece, and the axes of the spindle shafts of the respective machining units are orthogonal when viewed from one side, and the spindle shaft of one of the machining units is rotatable within an eccentric sleeve. A workpiece processing device characterized in that the eccentric sleeve is rotatably held relative to a unit main body.