JPH09323207A - Work rotating lathe dog - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a universal type work rotating lathe dog which is capable of holding, revolving and driving many kinds of works and is excellent in versatile applicability. SOLUTION: The lathe dog is provided with a plurality of jaw chucks 19 chucking works by individually operating a chuck hold face plate 7. A lathe dog member 13 is mounted on a lathe dog hold face plate 5 which is mounted on a driving face plate fixed to a spindle 101 and revolves integrally with the driving face plate, the lathe dog member 13 is engaged with the chuck hold face plate 7 and the revolution of the driving face plate is transmitted to the chuck hold face plate 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work rotating kelet used in a lathe, a roll grinder or the like.

[0002]

2. Description of the Related Art Generally, a rotary drive of a work in a lathe, a roll grinder or the like is performed by a three-jaw scroll chuck attached to a main shaft or a work rotating kelet.

[0003]

Conventionally, when the work is rotationally driven by a chuck, it is difficult to center and hold the work, and the work axis is eccentric, so that the runout easily occurs. On the other hand, the rotational drive of the work by the work rotation kere does not cause runout due to the work being rotated while the work is centered and held by the work supported by the center taper pin, but the shaft end shape, It is necessary to prepare various types of kelets according to the size and replace them.

In other words, the conventional kere lacks general versatility with respect to a work that can be dealt with. Therefore, there is a problem in that the kere is frequently replaced when the work is changed, and a lot of time is required for setup.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a versatile work rotating kelet capable of rotating and driving various works.

[0006]

In order to achieve the above-mentioned object, a work rotating kelet according to a first aspect of the present invention is provided with a chuck holding face plate and attached to the chuck holding face plate and individually operated to chuck the work. A plurality of claw chucks, a rotary plate holding face plate that is attached to a drive face plate fixed to a main shaft and rotates integrally with the drive face plate, and a fixed to the rotary plate holding face plate that engages with the chuck holding face plate. And a turning member for transmitting the rotation of the driving face plate to the chuck holding face plate.

In the work rotating keray according to the present invention,
The work is chucked by a plurality of jaw chucks, and each of the plurality of jaw chucks operates individually, so that the work can be accurately performed regardless of the shaft end shape (chucking shaft shape) of the work. It can be driven to rotate.

According to a second aspect of the present invention, there is provided the work rotating kelet according to the first aspect, wherein there are four pawl type chucks, and the four pawl type chucks are arranged at equal intervals around the rotation center axis. They are arranged and form a 4-jaw single-action chuck.

In the work rotating kelet according to the present invention,
The work is chucked by the 4-jaw single-acting chuck, and even if the shaft end has a shape other than a round bar, it can be accurately held and rotated.

According to a third aspect of the invention, there is provided the work rotating kelet according to the first or second aspect.
The turntable holding face plate is rotatably supported by the drive face plate in a direction inclined with respect to the plate face of the drive face plate.

In the work rotating keray according to the present invention,
Since the turntable holding face plate is rotatable in the direction inclining with respect to the plate face of the drive face plate, even if the chuck holding face plate is slightly eccentric or tilted with respect to the drive face plate in the work holding state, It accurately engages with the chuck holding face plate and transmits the rotation of the driving face plate to the chuck holding face plate. In addition, the work is not shaken due to eccentricity.

According to a fourth aspect of the invention, there is provided the work rotating kelet according to any one of the first to third aspects, wherein the fixing means for selectively fixing the chuck holding face plate to the drive face plate in a concentric manner. It is provided.

In the work rotating kelet according to the present invention,
The chuck holding face plate is positioned and fixed concentrically with respect to the drive face plate by the positioning and fixing means at the time of chucking the work, so that the concentricity between the claw chuck and the work is accurate, and no shake due to unbalance occurs. Further, since the chuck holding face plate is positioned and fixed concentrically with the drive face plate by the positioning and fixing means when the chuck is released, the chuck holding face plate does not drop.

According to a fifth aspect of the invention, there is provided a workpiece rotating kele according to any one of the first to fourth aspects, wherein the chuck holding face plate is located between the drive face plate and the chuck holding face plate by an axis line from a main shaft. The spring means is provided to urge in a direction away from each other.

In the work rotating kelet according to the present invention,
When changing the support state of the work from center support to receiving support, simply by retracting the center taper pin on the tailstock side, the chuck holding face plate is displaced in the axial direction away from the spindle by the spring force of the spring means. The center taper hole of the work can be released from the center taper pin of the spindle.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 6 show an embodiment of a work rotating kelet according to the present invention. In these drawings, the work rotating keray is generally indicated by reference numeral 1. The work rotating kelet 1 has a three-layer structure including a disc-shaped drive face plate (spindle base face plate) 3, a rectangular turning plate holding face plate 5, and a disc-shaped chuck holding face plate 7.

The drive face plate 3 is concentrically fixed to the outer peripheral portion of the main shaft 101. On the drive face plate 3, a pair of brackets 9 is attached to a pair of brackets 9 by a pivot 11 so as to be rotatable in a direction inclined with respect to the plate face of the drive face plate 3.

The axial direction of the pivot 11 coincides with the radial direction passing through the center of the drive face plate 3. Therefore, the turning plate holding face plate 5
Is supported by the drive face plate 3 rotatably around a radial axis passing through the center of the drive face plate 3. A wrench member 13 is fixedly attached to two diagonally opposite corners of the wrench holding face plate 5, and the wrench member 13 is fitted into an engaging recess 15 formed in a notch on an outer peripheral portion of the chuck holding face plate 7. Engaged. Pads 17 with which the rotary member 13 abuts are attached to both sides of the engaging recess 15.

On the chuck holding face plate 7, four claw-type chucks 19 are arranged at equal intervals (rotation angle of 90 degrees) around the central axis of rotation of the chuck holding face plate 7. In other words,
A 4-jaw single-acting chuck is formed on the plate surface of the chuck holding face plate 7.

Each of the claw chucks 19 has a base member 21 fixed to the chuck holding face plate 7, and a slider 23 slidably engaged with the base member 21 and movable in the radial direction of the chuck holding face plate 7. A chuck claw 25 fixed to the slider 23 and a feed screw rod 27 for moving the slider 23 in the radial direction of the chuck holding face plate 7 are provided, and a hexagonal head 29 of the feed screw rod 27 is rotated by a tool, respectively. It works individually.

Positioning fixing means 31 for selectively positioning and fixing the chuck holding face plate 7 to the driving face plate 3 in a concentric manner are provided at two positions between the driving face plate 3 and the chuck holding face plate 7.

The positioning and fixing means 31, as shown in FIG. 5, has a tapered head portion 33 and a small pitch screw portion 35.
The holding bolt 39 with a hexagonal hole that is screwed into the nut member 37 fixed to the drive face plate 3 by means of, and the holding bolt 39 that is supported by the rotation stop pin 41 to prevent rotation from the drive face plate 3.
Holding nut plate 45 screwed with the large pitch screw portion 43 of
And a taper bush 47 which is fixed to the chuck holding face plate 7 and through which a holding bolt 39 penetrates and a taper head 33 engages. By tightening the holding bolt 39, a small pitch screw portion 35 and a large pitch screw portion are provided. The pressing nut plate 45 is attached to the chuck holding face plate 7 according to the screw pitch difference of 43.
The taper head 33 to the taper bush 4
Taper engagement with 7.

The chuck holding face plate 7 is provided at each of two positions between the driving face plate 3 and the chuck holding face plate 7.
There is provided a spring means 49 for urging the element 1 in the direction away from the axial direction.

As shown in FIG. 6, the spring means 49 includes a spring holding member 51 fixed to the drive face plate 3 and a spring holding member 53 engaged with the spring holding member 51 so as to be displaceable in the axial direction of the spindle. The spring holding member 53 is provided between the spring holding member 51 and the spring holding member 53, and the spring holding member 53 is attached to the main shaft 10.
The disc spring 55 urges the disc spring 1 in the direction away from the axial direction (to the right in FIG. 6) and the adjusting screw 57 that is screwed into the chuck holding face plate 7 and abuts against the spring pressing member 53. .

Next, the usage and operation of the work rotating keray 1 having the above-described structure will be described.

(1) Tighten the holding bolt 39, and the holding nut plate 45 as shown in FIG. 5 due to the screw pitch difference between the small pitch thread portion 35 and the large pitch thread portion 43.
Is pressed against the back surface of the chuck holding face plate 7, and the taper head 3
3 is taper-engaged with the taper bush 47. As a result, the chuck holding face plate 7 is positioned and fixed concentrically with the drive face plate 3. This means that the work rotating keray 1 is pre-installed on the headstock.

(2) Loosen the adjusting screw 57 and set the disc spring 5
Free 5

(3) Next, the roll W, which is a work, is carried in, the center taper hole Wc formed in the left end surface of the roll W is engaged with the center taper pin 103 of the main shaft 101, and the roll W with respect to the main shaft 101. Center (see Figure 2). The right end of the roll W is centered and held by a center taper pin of a centering stand (not shown).

(4) Next, the hexagonal head 29 of the feed screw rod 27 of each claw chuck 19 is turned by a tool to move the chuck claw 25 together with the slider 23 toward the center of the chuck holding face plate 7 in the radial direction. The roll W is tightened by the chuck claws 25 of the expression chuck 19. At this time, the chuck holding face plate 7 is positioned and fixed concentrically with respect to the drive face plate 3, so that the four claw chucks 19 perform chucking even in a state of being concentric with the center of the roll W.

Since each claw type chuck 19 operates individually, the chucking shaft portion of the roll W may have a round bar shape or a shape other than the round bar shape. Regardless of how you hold this,

(5) Next, the holding bolt 39 is loosened, and the holding nut plate 45 is separated from the back surface of the chuck holding face plate 7 by the difference in screw pitch between the small pitch screw portion 35 and the large pitch screw portion 43, and the taper head 33 is removed. It is separated from the taper engagement with the taper bush 47. As a result, the positioning holding of the chuck holding face plate 7 with respect to the drive face plate 3 is released, and the uneven load by the pawl type chuck 19 does not act on the work, and the work is supported with reference to the center hole.

(6) Next, the adjusting screw 57 is tightened, and the spring pressing member 53 is pushed by the adjusting screw 57 to bend the disc spring 55.

When the support state of the roll W is changed from center support to receiving support, if a center taper pin (not shown) on the tailstock side is retracted, the spring force of the disc spring 55 causes the chuck holding face plate 7 to move. 101 is displaced in the axial direction away from 101, and the center taper hole W of the roll W is
c is disengaged from the engagement of the center taper pin 103 of the main shaft 101.

As described above, the work for mounting the rollers by the work rotating keray 1 is completed, and when the drive face plate 3 is rotated by the rotation of the main shaft 101, the rotary holding plate 5 is rotated integrally with the drive face plate 3, and the rotary member 13 is rotated. Chuck holding face plate 7
The rotation of the drive face plate 3 is transmitted to the chuck holding face plate 7, and the roll W attached to the chuck holding face plate 7 by the claw chuck 19 rotates.

In this roll rotation drive, even if the chuck holding face plate 7 is slightly eccentric or inclined with respect to the driving face plate 3, the turning metal holding face plate 5 is rotated around the axis of the pivot 11 with respect to the plate face of the driving face plate 3. By rotating in the tilting direction, the two turning members 13 are respectively moved to the chuck holding face plate 7
The rotation of the driving face plate 3 swings to the chuck holding face plate 7 and is transmitted smoothly without twisting. As a result, precise turning and grinding can be performed.

When removing the roll W, the above (1)
2), that is, the pressing bolt 39 is tightened to position and fix the chuck holding face plate 7 with respect to the drive face plate 3, and thereafter the chucking of the roll W by the pawl type chuck 19 is released.

As a result, the chuck holding face plate 7 does not drop even if the chuck is released.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to this, and various embodiments may be made within the scope of the present invention. The possibilities will be clear to the skilled person.

[0040]

As can be understood from the above description, according to the work rotating kelet according to claim 1, chucking of a work such as a roll is performed by a plurality of claw chucks, and the plurality of claw chucks are used. Since each chuck operates individually, even if the shaft end shape (chucking shaft part shape) of the work is something other than a round bar shape, and regardless of the shaft end dimension, it can be held properly and rotated. It can be driven, there is no need to prepare many types of kerets, and it is sufficient if the kerets are mounted semi-fixedly on the headstock, and there is no need to replace the kerets even when the work is changed.

According to the work rotating kere according to the second aspect, since the work is chucked by the 4-jaw single-action chuck, even if the shaft end is a work other than a round bar, the work is accurately held and rotated. Can be driven.

According to the work rotating kere according to the third aspect of the present invention, since the turntable holding face plate is rotatable in the direction inclining with respect to the plate face of the driving face plate, the chuck holding face plate is in the workpiece holding state. Even if it is slightly eccentric or inclined with respect to, the turning member accurately engages with the chuck holding face plate, so that the rotation of the driving face plate is smoothly transmitted to the chuck holding face plate without twisting and precise turning. , Grinding will be performed.

According to the fourth aspect of the invention, the chuck holding face plate is positioned and fixed concentrically with the drive face plate by the positioning and fixing means during chucking of the work, thereby eliminating the eccentricity between the claw chuck and the work. Further, when the chuck is released, the chuck holding face plate is positioned and fixed concentrically with the driving face plate by the positioning fixing means, so that the chuck holding face plate does not drop.

According to the fifth aspect of the invention, the spring force of the spring means is simply changed by retracting the center taper pin on the tailstock side when changing the support state of the work from the center support to the receiving support. As a result, the chuck holding face plate is displaced in a direction away from the main shaft in the axial direction, and the center taper hole of the work can be released from the center taper pin of the main shaft, so that the support state of the work can be efficiently changed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a work rotating kelet according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view on arrow X in FIG.

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a sectional view taken along line DD of FIG. 1;

[Explanation of symbols]

 1 Work Rotation Kerley 101 Spindle 3 Drive Face Plate 5 Rotating Face Holding Plate 7 Chuck Holding Face Plate 11 Pivot 13 Rotating Metal Member 15 Engagement Recessed 17 Abutment 19 Claw Chuck 21 Base Member 23 Slider 25 Chuck Claw 27 Feed Screw Rod 31 Positioning Fixing means 39 Hexagon socket head cap bolt 45 Holding nut plate 47 Taper bush 49 Spring means 55 Disc spring 57 Adjustment screw 101 Main shaft 103 Center taper pin

Front page continuation (72) Masayuki Tatara Masayuki Tatara 3-2068 Ooka, Numazu City, Shizuoka Inside Numazu Works, Toshiba Machine Co., Ltd. (72) Shuichi Ikeda 1-3-1, Tsujidojindai, Fujisawa, Kanagawa Kanto Special Steel Co., Ltd. (72) Inventor Haruki Kabe 1-3-1 Tsujido-Kandai, Fujisawa-shi, Kanagawa Kanto Special Steel Co., Ltd. (72) Inventor Yoshinobu Hata 1-3-1 Tsujido-Kandai, Fujisawa-shi, Kanagawa Kanto Special Steel Co., Ltd. (72) Inventor Tsuneo At first glance 1-3-1, Tsujido-jindai, Fujisawa-shi, Kanagawa Kanto Special Steel Co., Ltd.

Claims (5)

[Claims] 1. A chuck holding face plate, a plurality of claw chucks attached to the chuck holding face plate, each of which operates individually to chuck a workpiece, and a drive face plate attached to a drive face plate fixed to a spindle. And a wrench holding face plate that rotates integrally with the wrench holding face plate, and a wrench member that is fixed to the wrench holding face plate and that engages with the chuck holding face plate and transmits the rotation of the drive face plate to the chuck holding face plate. Work rotation keray characterized by. 2. The four pawl type chucks are arranged, and the four pawl type chucks are arranged at equal intervals around a rotation center axis line to form a four-claw single-acting chuck. Work rotation keret described in. 3. The work according to claim 1 or 2, wherein the turning plate holding face plate is rotatably supported by the driving face plate in a direction inclined with respect to the plate face of the driving face plate. Rotating kelet. 4. The work rotating kelet according to claim 1, further comprising a positioning fixing means for selectively positioning and fixing the chuck holding face plate concentrically with the drive face plate. 5. Spring means for urging the chuck holding face plate away from the main shaft in the axial direction is provided between the drive face plate and the chuck holding face plate. Work rotation keray described in any one of.