JPH07308836A - Magnet type oscillation restraining device - Google Patents

Abstract

PURPOSE:TO eliminate the interference with a measuring head so as to enable the measurement for an in-process, and to facilitate the installation and removal of a workpiece after the adjustment for centering the workpiece. CONSTITUTION:A magnet type oscillation restraining device is composed of a superposed block structure which is provided on a base 2 below a workpiece 26, and the longitudinal position, vertical position, and longitudinal and vertical parallelism, with respect to the workpiece 26, of thereof being adjustable, a magnet block 24 provided on the block structure, which can be turned on and off, and a V-like block 25 replaceable set, on the magnet block 14 and adapted to attract the workpiece by a magnetic attracting force caused by the energization of the magnet block 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator for supporting a midway portion of a workpiece during machining operation, and particularly to a workpiece without interfering with an in-process measuring apparatus for the outer diameter of the workpiece or the effective diameter of the screw portion. The present invention relates to a magnet type swing stop device capable of supporting a magnet.

[0002]

2. Description of the Related Art When grinding a small-diameter, long workpiece (workpiece) with a screw shaft grinder or the like, a middle position of the workpiece is supported in order to prevent deflection and center runout of the workpiece being supported at both ends during processing. A swinging device is used. FIG. 5 shows a guide bush type vibration proof device, including a base 27 mounted on the main body bed in front of the grinder or on a work table, and a substantially semi-circular work support portion mounted on the base 27. Support arm 28 having a
And a guide bush 29 having a substantially semi-circular shape that is fitted to the work table supported by the work table of the grinder, and the bush 29 is slightly pushed by pressing the bolt 30 on the arm 28. And adjust so that the work does not rattle. The centering of the work is performed by adjusting the position of the support arm 28 with the vertical adjustment bolt 31 and the front-back adjustment screw 32. After the adjustment, the clamp bolt 33 fixes the vertical direction, and the lock nut 62 fixes the front-back direction.

FIG. 6 shows a conventional example of a three-arm type vibration isolator, in which an upper arm 34 and a lower arm 35 are pivotally attached to a base 27 so as to sandwich the work 26 vertically.
In addition, a central arm 36 that abuts on the front center of the work 26
Is mounted on the front surface of the base 27 so that it can be moved in and out, and the work 26 is supported at three points by these three arms 34, 35, 36 so as not to hinder the grinding work. 37 is an upper arm clamp knob, 38 is a central arm clamp knob, and 39 is a lower arm clamp knob. Work 26
Is set on the main body of the grinder with the upper arm 34 removed, and after the work is set, the upper arm 34 is attached again. The work 26 is aligned with the lower arm 3
The lower arm 35 is finely rotated up and down by the vertical adjusting screw 40 of 5, and the central arm 36 is moved in and out by the frontward and rearward adjusting screw 41. After the centering is completed, the work 26 is lightly pressed by the upper arm 34 by the adjusting screw 42 on the upper part of the base 27, and the clamp knobs 37, 38, 39.
The upper, middle and lower arms 34, 36 and 35 are fixed by.

[0004]

An in-process measuring method is known in which the effective diameter of a screw shaft is measured during grinding of the screw shaft, and the cutting feed of the grinding wheel during machining operation is controlled based on the measured effective diameter. As an in-process measuring device that realizes this, for example, as disclosed in Japanese Patent Laid-Open No. 1-295713, one measuring head is provided on the side opposite to the grinding wheel with respect to the screw shaft to be machined, that is, on the front surface of the bed. It is arranged on the device side, and the measurement is performed by sandwiching the screw shaft to be processed with the grinding wheel and the probe, and when not measuring, the swivel plate holding the probe is swung upward together with the probe. An in-process measuring device for the effective diameter of the screw shaft has been developed.

In this measuring apparatus, one measuring head and a grinding wheel work together to sandwich the screw shaft, and it is possible to perform grinding while automatically measuring the effective diameter of the screw shaft. Although the dimensional accuracy and machining efficiency are improved, the measuring head comes to the front position 180 ° opposite to the grinding wheel, so if the above-mentioned vibration damping device is attached to the screw shaft grinder equipped with this in-process measuring device, the table traverse During this, the measuring device interferes with the vibration isolator.

In order to avoid such interference, the measuring head of the in-process measuring device can be swung upward and retracted at the position of the vibration isolator. In that case, the effective diameter measurement of the screw shaft of the vibration isolator is performed. It will be impossible. In particular, with a screw shaft with a small outer diameter, the vibration damping span becomes narrow, and the measurement data that can be collected will be almost lost if measurement is performed excluding the vibration damping position.

Further, in addition to the above-mentioned in-process measurement, also in the case of manually measuring the oblique diameter dimension of the threaded portion, it is impossible to measure the dimension of the threaded portion of the vibration damping portion by the conventional vibration damping device.

Further, in the conventional guide bush type or three-point type vibration isolator, it takes a lot of time to attach and detach the work, and the centering of the work support part is also difficult in fine adjustment.

According to the present invention, a work supporting structure using a V block utilizing magnetic attraction is used to eliminate interference with the measuring head, and to perform centering adjustment of the work and easy attachment / detachment of the work by a magnet type vibration. To provide a stop device.

The present invention further relates to the above-mentioned JP-A-1-29.
An object of the present invention is to provide a magnet type vibration damping device used in a screw shaft grinder equipped with an in-process measuring device for the effective diameter of the screw shaft disclosed in Japanese Patent No. 5713.

[0011]

A magnet type vibration damping device according to the present invention is provided on a base below a work and adjusts a front-rear direction position, a vertical position, a front-back direction parallelism and a vertical direction parallelism with respect to the work. A possible superposed block structure, an ON / OFF switchable magnet block provided on the block structure, and a magnetically attracting force that is placed on the magnet block in a replaceable manner and is biased by the magnet block. And a V block for adsorbing the work.

[0012]

The V block supporting the work is placed on the magnet block which can be switched on and off, and the magnet block is held on the base through a plurality of blocks (superposition block structure) whose positions can be adjusted. ,
When the magnet block is turned on, the work is attracted onto the V block at two points from the lower side, so the front of the work on the side opposite to the grinding wheel at the swing stop position is in an open state, and the measurement head is placed from the front of the work. In contact with the measuring device, interference with the measuring device does not occur, and in-process measurement over the entire length of the work becomes possible. By turning off the switch of the magnet block, the work can be easily attached and detached, and the stacked block structure which is slidably stackable for centering operation can be easily adjusted up and down and front and back by the screw feed mechanism. . The parallelism (front-rear parallelism, up-down parallelism) of the upper surface of the magnet block can be similarly adjusted by screw operation. When changing the outer diameter of the work, it can be dealt with by replacing only the V block.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side sectional view of a magnet type vibration damping device according to an embodiment of the present invention, and FIG. 2 is a front view of the vibration damping device as seen from the grinding wheel side of the grinder, that is, as seen from the arrow F direction in FIG. Is. A swing stop device main body base 2 is provided so as to straddle the upper surface of the work table 1.
The sub-base 3 having a T-shape in front view (FIG. 2) is fixed on the upper side. Jack bolts 4 are respectively interposed between the lower surface of the T-shaped portion 3a protruding on both sides of the sub-base 3 and the main body base 2, and the T-shaped portion of the sub-base 3 is operated by operating these jack bolts 4 individually. 3a is deformed, and the work 2 of a superposed block structure 10, which will be described later, is placed on the upper surface of the T-shaped portion.
The parallelism of 6 with respect to the longitudinal direction, that is, the vertical parallelism (direction A in FIG. 2) is adjusted. The V block 25 is mounted on the upper surface of the overlapping block structure 10 via the magnet block 24.

The superposed block structure 10 placed on the sub base 3 has a structure in which three blocks 5, 13, 22 and a wedge member 21 to be described later are superposed. First, the bottom base block 5 is mounted on the upper surface of the base 3 by being pivotally supported by a pin 6 standing upright on the sub base 3 at the central portion thereof, and the bolt receiving members protruding from both sides of the block 5 as shown in FIG. A front and rear parallelism adjusting bolt 8 is screwed into the screw 7. The tip of the adjusting bolt 8 is in contact with the side portion of the sub base 3, and the operation of the adjusting bolt 8 causes the base block 5 to slide and pivot around the pin 6 with respect to the sub base 3, whereby the work 26 in the horizontal plane is rotated. The parallelism in the front-rear direction of the V block 25 with respect to the axis direction of (in the B direction in FIG. 3) is adjusted. After the adjustment, the sub base 3 and the base block 5 are fixed by the bolt 9.

A guide block 13 corresponding to the second stage of the superposed block structure 10 is mounted on the upper surface of the base block 5. The guide block 13 is slidable in the front-rear direction by fitting a dovetail portion 14 formed on the lower surface thereof in the front-rear direction and a dovetail groove formed on the upper surface of the base block 5, which can be slid in the front-rear direction. To do.

A vertical plate-shaped support column 15 is fixed to the upper surface of the front portion of the guide block 13 as shown in FIG. Prop 1
A bracket 16 extends from the main body base 2 to be spaced apart in front of the main body 5 and substantially in parallel with the column. This body bracket 1
An anterior-posterior position adjusting bolt 17 extending in the anteroposterior direction is axially supported on the upper part of the shaft 6 so as to be immovable in the axial direction.
7 a is screwed into the plate-shaped support 15 of the guide block 13. A tension bolt 18 inserted from the column 15 into the body bracket 16 is provided below the front-rear position adjustment bolt 17, and a disc spring 19 is provided between the tip screw portion 18a of the tension bolt 18 and the front surface of the body bracket. The nut 20 is screwed through the support shaft 1 by the spring force of the disc spring 19.
5, therefore the guide block 13 is provided with a pullback force to the front. This pulling force causes the front-rear position adjustment bolt 1
By removing the backlash 7 and operating the adjusting bolt 17, the position of the guide block 13 in the front-rear direction (direction C in FIG. 1) is adjusted by its screw action.

A top block 2 having an L-shape in a side view is provided on the upper surface of the guide block 13 via a wedge member 21 for adjusting the vertical position.
Two are provided. The lower surface of the top block 22 is formed with a dovetail groove and is inclined forward and backward so that the height becomes lower on the front side. The vertical part of the L-shaped top block 22 is the column 1.
It is slidable up and down along the guide surface 15a formed on the surface 5.

The wedge member 21 is inclined forward and backward corresponding to the inclined surface of the lower surface of the top block 22 so that the upper surface as a whole is lowered on the front side, and the upper and lower surfaces are formed with dovetail portions 21a and 21b. Are engaged with the dovetail groove on the upper surface of the guide block 13 and the dovetail groove on the lower surface of the top block 22. A vertical position adjusting bolt 23 screwed into the wedge member 21 is inserted into the lower portion of the pillar 15 of the guide block 13 so as to be immovable in the axial direction, and by operating the bolt 23, the wedge member 21 is moved back and forth by its screw action. Then, the vertical position (D direction in FIG. 1) of the top block 22 engaged with the wedge member 21 is adjusted.

On the top block 22 located at the top of the superposed block structure 10 described above, the switch ON-
Magnet block 24 that is energized and deenergized by OFF operation
Is stuck. A V block 25 made of a magnetic material is detachably mounted on the magnet block 24 with a bolt or the like, and a work 26 such as a screw shaft is supported on the V block 25. By turning on the magnet block 24,
The magnetic attraction force acts on the work 26 via the V block 25, and the work 26 is attracted to the V-shaped portion of the V block 25 by two-point support. By turning off the magnet block 24, the magnetic attraction force disappears, and the work 26 can be easily removed from the V block 25. Incidentally, the surface of the V-shaped portion of the V block 25 is subjected to abrasion resistance treatment by flame quenching or the like, if necessary.

As described above, the magnet block 24 and the V block 25 mounted on the upper portion of the superposed block structure 10 include the jack bolt 4 for adjusting the vertical parallelism, the front-rear parallelism adjusting bolt 8, the vertical position adjusting bolt 23, and the vertical position adjusting bolt 23. By operating the front-back position adjusting bolt 17, the vertical parallelism, the front-back parallelism, the vertical position, and the front-back position are adjusted, respectively. When the work size such as the outer diameter is changed, only the V block 25 needs to be replaced. Since the superposed block structure 10 is located below the upper surface of the V block 25 and the front surface of the work 26 is largely free, even if the measuring head is brought into contact with the work 26 from the front surface of the work at the vibration stop position, the block structure is used. There is no interference, and so-called in-process measurement, in which the effective diameter of the screw shaft is measured during processing of the screw groove of the work 26, can be realized without trouble over the entire length of the screw shaft.

Next, an in-process measuring device for a screw shaft grinding machine using the magnet type vibration damping device of the present invention will be described. FIG. 4 is a partial side view in the vicinity of a grinding wheel of a screw shaft grinder having a magnet type vibration damping device and an in-process measuring device of a screw shaft effective diameter according to the present invention. The work 26 which is a screw shaft is horizontally supported on the work table of the grinder at both ends thereof, and the midway part is supported by magnetic attraction on the V block 25 of the magnet type vibration damping device of the present invention described with reference to FIGS. The work table is moved to move in the axial direction.

A swivel bracket 46 is provided at the front of a grindstone base 45, which pivotally supports the grindstone wheel 43, between a recumbent position which is close to the upper part of the side surface of the grindstone wheel 43 and horizontally straddles the workpiece 26, and an obliquely upper retracted position. A piston rod 48 of an air cylinder device 47, which is pivotally mounted via a pivot shaft 46a so as to pivot between them, and which is pivotally supported on the upper part of the grindstone base 45 as a drive source for this pivoting motion, is pivotally attached to the pivot bracket 46. Has been done. A uniaxial table extending along the turning bracket is fixed in the turning bracket 46. The uniaxial table has a measuring head supporting mechanism 50 whose position can be adjusted, and parallel plate springs 51 and 52, and the measuring head 4
4 is suspended.

During the finish grinding of the workpiece 26, if the swivel bracket 46 swivels and falls horizontally, the measuring head 44
Is at a position apart from the grinding wheel 43 on the uniaxial table, and from this state, the measuring head 44 moves toward the grinding wheel 43 on the uniaxial table by the pulse motor 61 at the tip of the turning bracket. Is sandwiched by the probe 60 at the tip of the measuring head and the grinding wheel 43 from a direction opposed to 180 °, and the grinding and measurement are started as the work 26 rotates and moves in the axial direction. The parallel leaf spring 5
Reference numerals 1 and 52 are each composed of a pair of opposed leaf springs, and the parallel leaf spring 51 and the parallel leaf spring 52 are attached so that their plate surface directions are orthogonal to each other, whereby the horizontal direction ( It is designed to absorb the deviation in the work axis direction and to secure an appropriate contact pressure to the work 26. Even when the measuring head 44 is swung to the measuring position, the vibration isolator does not interfere with the measuring head 44 at all, and the workpiece can be measured over the entire length of the workpiece 26.

An electric micrometer 54 is in contact with the rear end of the measuring head 44 at the lower end of the bracket 53 extending from the measuring head supporting mechanism 50, whereby the displacement of the tip end of the measuring element 60 in the front-back direction is caused by the electric micrometer. It is taken out through the meter 54, the difference in the effective diameter of the screw shaft is calculated by the arithmetic processing unit 57 through the amplifier 55 and the A / D converter 56, and the command for correcting the cutting amount of the grinding wheel head 45 is output. Further, the measurement result is displayed on the CRT 58.

After the measurement and finish grinding are finished, the swing bracket 46 is moved by the air cylinder device 47 to the measuring head 4.
4 and swivel upwards (the position indicated by the solid line in FIG. 4).
Taken out of block 25. During the rough grinding, the swing bracket 46 is also in the upper retracted position, and in-process measurement is not performed.

[0026]

As described above, according to the present invention, the work is supported by the two-point contact support by the V block, and the V block is magnetized by the ON / OFF operated magnet block to magnetically attract the work. I did so, so 2
Since the work is held securely regardless of the point support, and the front of the work is in the open state, the probe is placed on the opposite side of the workpiece from the grinding wheel 180 °, and the work is placed between the wheel and the probe. It is possible to perform so-called in-process measurement for the entire length of the work, in which the work diameter is measured while being sandwiched from the diameter direction during the grinding operation. The centering adjustment of the V block is performed by mounting the magnet block on a block structure in which a plurality of blocks are stacked, and using the screw action or the like in the block structure, the parallelism in the front-rear direction, the vertical direction, the front-rear direction, and the vertical position. This can be easily done by adjusting. In particular, since the vertical adjustment uses the wedge action, the operation is extremely precise. Since the work is held in the V block by a magnetic attraction force that can be switched ON and OFF, the work can be easily attached and detached, and even when the work size is changed, only the V block needs to be replaced. Be brought.

[Brief description of drawings]

FIG. 1 is a side sectional view of a magnet type vibration damping device according to an embodiment of the present invention.

FIG. 2 is a front view of the vibration damping device as viewed in the direction of arrow F in FIG.

FIG. 3 is a top view of the embodiment shown in FIG.

FIG. 4 is a side view of an in-process measuring device of an effective diameter of a screw shaft using a magnet type vibration damping device according to an embodiment of the present invention.

FIG. 5 is a perspective view of a conventional guide bush type vibration damping device.

FIG. 6 is a side view of a conventional three-arm type swinging device.

[Explanation of symbols]

 2 main body base 3 sub-base 4 jack bolt 5 base block 6 pin 8 front-rear parallelism adjusting bolt 10 overlapping block structure 13 guide block 17 front-rear position adjusting bolt 19 disc spring 21 wedge member 22 top block 23 up-down adjusting bolt 24 magnet block 25 V block 26 Work 43 Grinding wheel 44 Measuring head 54 Electric micrometer 60 Measuring element

Claims (1)

[Claims] 1. A superposed block structure provided on a base below a work and capable of adjusting a front-rear direction position, a vertical position, a front-rear direction parallelism and a vertical parallelism with respect to a work, and a block structure body. O provided in
A magnetic block having a magnet block that can be switched between N and OFF and a V block that is exchangeably mounted on the magnet block and that attracts the work by a magnetic attraction force generated by the bias of the magnet block. Stop device.