JPH10100007A - Chuck adapter for lathe and lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter which can make a chuck of the other type when it is mounted on a chuck mounted on a lathe. SOLUTION: This is a chuck adapter removably mounted on the end of the work-holding side of a chuck mounted on a lathe 2 and has a space which allows a first soft jaw 62 mounted on the end of the work-holding side of the chuck to move and a soft jaw holder 40 for holding a second soft jaw 61 which grips the work in cooperation with the first soft jaw 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck adapter and a lathe which are fixed to a spindle end of a lathe and which are attached to a chuck for holding a workpiece. It can be changed to a different format.

[0002]

2. Description of the Related Art A chuck for holding a workpiece to be machined by a lathe is provided with a plurality of green nails for gripping the workpiece, and chucks having different numbers of green nails depending on the shape and structure of the workpiece. Can be used properly. FIG. 7 is a perspective view showing an example of a three-way jaw chuck having three buds.

[0003] On the front surface of the cylindrical chuck main body (11), three buds (13) (1) arranged at 120 ° intervals in the circumferential direction.
3) (13) is provided. These births (13) (13) (13)
Are fixed bolts to the breeding holders (15), (15), (15), which are slidably loaded into guide grooves (14), (14), (14) that extend radially from the center of the chuck body (11). (16) and (16), respectively, so that each sprout (13) (13) (13) is integrated with the sprout holder (15) (15) (15) in the guide groove (15). 14) (1
4) It is configured to move along (14). The chuck body (11) is attached and fixed to the tip of a main shaft (21) provided on the lathe (2) with mounting bolts (18), (18), (18).

In this apparatus, for example, a columnar or hexagonal column-shaped workpiece is grasped and processed by forming pieces (13), (13) and (13) which gather toward the center of the chuck main body (11). The three-way jaw chuck is not suitable for holding a quadrangular prism-shaped or irregularly shaped work. The jaw chuck is attached to the spindle (21) of the lathe (2).
And the two-sided nail chuck is used to hold the quadrangular prism-shaped workpiece or the like. When replacing the chuck, loosen the mounting bolts (18) and (18) that fix the chuck main body (11) to the main shaft (21), remove the chuck from the tip of the main shaft (21), and remove the mounting bolt. (18) The two-way jaw chuck is mounted on the spindle (21) again by utilizing (18).

[0005]

However, in the above-mentioned apparatus, when changing the chuck attached to the lathe (2) to a chuck having a different number of spawns, a new chuck is attached to the lathe (2). In addition to the work, it is necessary to remove the already attached heavy chuck, and the replacement work becomes complicated as much as the removal work is required. Also, insert the sprout holder (15) for sprout (13) into the guide groove.
For models that move hydraulically along (14),
(2) It is necessary to reconnect the connection bar for supplying hydraulic pressure to the chuck from the side to the connection port on the back of the chuck, etc.
The replacement work becomes more complicated.

[0006] This application has been made in view of such a point, and provides an adapter which can be attached to a chuck already attached to a lathe so that the adapter can be a different type of chuck. It is an object of the present invention to eliminate the necessity of removing the chuck.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a chuck adapter for a lathe removably mounted on a workpiece side end of a chuck mounted on a lathe (2). A space, which is attached to the workpiece holding side end of the chuck, for allowing movement of a first sprout, and a second space for grasping a work in cooperation with the first sprout.
And a breeding holder (40) for holding the breeding. "

When using the above chuck adapter,
The chuck adapter is mounted on the workpiece holding end of an existing chuck already mounted on the lathe (2). Then, a separately prepared second bobbin is attached to the bobbin holder (40) of the chuck adapter. Then, the workpiece is grasped by using the second birth and the first birth attached to the chuck, and the lathe (2) is operated in this state to process the workpiece.

[0009] The growing holder (40) may fix the second growing in a state in which it cannot be moved. The second bud is held so that the second bud can be moved in the radial direction from the rotation center of the chuck. " According to the third aspect of the present invention, "the number of the growing holders (40) is one, and the second growing in a state of being held by the growing holder (40) is the first growing. In the radial direction with the rotation center interposed therebetween, the chuck is attached to the lathe (2) and only one pinch is removed and the one pinch is removed from the first pinch. The workpiece can be clamped by the second pin held by the pin holder (40) of the chuck adapter according to the third aspect of the present invention, and can be attached to the lathe (2). Can be changed to a two-way nail type.

According to a fourth aspect of the present invention, the "lathe chuck adapter which is mounted on the lathe (2) together with the chuck by a common mounting bolt (18)" is provided for the chuck mounted on the lathe (2). The lathe chuck adapter of the present invention can be attached without forming a special mechanism.

According to a fifth aspect of the present invention, wherein the second bud is detachably attached to the bud holder (40), the second bud is already formed in the holder (40). 40)
Therefore, there is no need to separately prepare the second birth. According to a sixth aspect of the present invention, there is provided a chuck having a first sprung attached to an end of a spindle (21) and movable at a tool holding side end, a space allowing the movement of the first sprout, and a second chuck. A lathe having a sprout and a chuck adapter for a lathe removably attached to the work holding side end of the chuck, wherein the work is gripped by the second sprout and the first sprout. Lathe, which can provide a lathe in which a workpiece can be gripped by a chuck already mounted on the spindle (21) and a chuck adapter for the lathe.

[0012]

As described above, according to the first to sixth aspects of the present invention, the workpiece is grasped by the second sprout held by the sprout holder (40) and the first sprout attached to the chuck. Therefore, by attaching / detaching the lathe chuck holder in which the number of sprue holders (40) is appropriately set, the chuck can be changed to a type having a different number of claws.

[0013] In particular, according to the third aspect of the invention, the chuck attached to the lathe (2) can be changed to a two-jaw type.
For example, the work of temporarily changing a frequently used three-way claw type chuck to a two-way claw type can be easily performed.
According to the invention of claim 4, since the chuck adapter for the lathe can be attached to the chuck attached to the lathe (2) without forming a special mechanism, the chuck adapter can be attached to the existing chuck as it is. .

[0014]

Next, embodiments of the present invention will be described. FIG. 1 shows a chuck adapter (3) according to the embodiment of the present invention and a chuck main body (1) mounted on a lathe (2).
FIG. 2 is an exploded perspective view showing the relationship of 1). The chuck adapter (3) of this embodiment includes a disc-shaped base (31) and a sprung holder (40) attached to the front surface thereof with bolts (41) (41).
A fine adjustment bolt (51) for finely adjusting the position of the forming holder (40); and a pair of first and second forming members (62) facing each other.
(61). Note that it is not always necessary to prepare special first and second buds (62) and (61), and a bud attached to the chuck body (11) may be used as described later. In other words, the chuck adapter (3) according to the embodiment of the present invention can be one that does not have the first and second springs (62) and (61) or one that has only the second spring (61). .

A rectangular notch (32) formed so as to extend from the outer periphery toward the center of the disc-shaped base (31) (the space described as the invention specific matter of the first invention). Corresponding to the notch (32)
The width and length of the holder frame of the holder (15) protruding from the front of the chuck attached to the spindle (21) of the lathe (2)
(151) is slightly larger than the width and length of the notch (32), so that the notch (32) can be externally fitted to the growing holder (15).

A lathe is located at the center of the back of the base (31).
The center hole (1) of the chuck mounted on the spindle (21) of (2)
The positioning column (33) for fitting into 7) is raised, and two concave grooves (34) (34) are radially formed at 120 ° intervals from the outer periphery of the positioning column (33). While extending, the leading ends of the concave grooves (34) (34) are open to the outer periphery of the base (31) (see FIG. 1). The width of the grooves (34) and (34) is the same as the width of the holder on the front of the chuck attached to the lathe (2).
(15) is set to be slightly larger than the width of the holder frame (151), and the interval between the concave grooves (34) and (34) and the notch (32) is set to 120 °. As a result, the concave grooves (34) and (34) are formed into the chuck forming holders (15) and (15).
The holder frames (151) and (151) can be externally fitted.

In addition, a holder mounting groove (36) is formed on the front surface of the base (31) and extends in the radial direction opposite to the notch (32) with the center of rotation therebetween. The loading groove (36) is open to the outer periphery of the base (31). On both sides of the holder mounting groove (36), bolt fastening holes (37) (37) for inserting mounting bolts (18) (18) extracted from the chuck attached to the lathe (2), Growing holder (40)
Screw holes (38) and (38) are provided for fixing the holes. or,
A screw hole (39) is formed in the outer periphery of the base (31) to reach the elongated through hole (35) formed in the bottom wall of the holder loading groove (36). 39) is screwed until the tip of the fine adjustment bolt (51) reaches near the center of the through hole (35).

The holder (40) attached to the holder loading groove (36) is a holder frame having a guide groove (431) formed therethrough.
(43) and a slider (42) slidably mounted in the guide groove (431). Opposing engagement pieces (432) (432) are formed in openings of the guide grooves (431) formed in the holder frame (43). Then, on the surfaces of these engagement pieces (432), (432), a second birth (61)
Serrations (433) and (433) are provided to prevent slippage of the frame, and mounting flanges (434) and (434) project from both sides of the holder frame (43).
(434) In (434), bolt insertion holes (435) (435) corresponding to the screw holes (38) (38) formed in the front surface of the base (31) are formed. The bolt insertion holes (435) and (435) are
As shown in FIG. 1, it is formed in a long hole shape. Also, on the back surface of the holder frame (43), the holder mounting groove of the base (31) described above is provided.
Projection shaft (436) inserted into through hole (35) formed in (36)
(See FIG. 3).

The slider (42) loaded in the guide groove (431) of the holder frame (43) is formed of a rod-shaped body having a T-shaped end face, and is formed with a second pinch (described later). Screw holes (420) (420) are formed in the surface facing the 61) side.
Second bobbin (61) attached to the above bobbin holder (40)
Is a rectangular parallelepiped block in which a groove (611) running in the longitudinal direction is formed on the side of the breeding holder (40).
On both sides of (611), the holder frame (4
Serrations (612) are formed to mesh with the serrations (433) formed on the surface of 3). In addition, the second birth (6
1) is provided with bolt fastening holes (613) and (613) penetrating from the front and back, and the fixing bolts (614) and (614) are connected to the slider through the bolt fastening holes (613) and (613). (42) The screw holes (42
0) It can be screwed into (420).

The first spring (62) attached to the chuck body (11) of the chuck loaded on the spindle (21) of the lathe (2).
Is a block having an L-shaped side surface, and has a groove (621) and serrations (622) on both sides thereof on the surface on the chuck main body (11) side, as in the case of the second birth (61) described above. Are formed. The serration (622) meshes with the serration (150) on the surface of the holder frame (151) protruding from the tip of the chuck body (11) mounted on the lathe (2).
In addition, the first birth (62) has bolt fastening holes (6
23) (623) is drilled and the bolt tightening holes (623) (6
23) and the fixing bolt (624) (624)
It can be screwed into the screw holes (120) (120) on the tip surface of 1). The slider (121) is slidably mounted in a holder frame (151) mounted on the chuck body (11) already mounted on the lathe (2). Specifically, FIG. As shown, it is slidably loaded in an inverted T-shaped guide groove (152) formed in the holder frame (151).

The chuck adapter (3) is used, for example, as shown in FIG. 1, attached to the chuck main body (11) of an existing three-way jaw chuck. Note that the chuck main body (11) is formed in the same manner as that of FIG. 7 described as the above-described conventional technology, and three chucks formed to extend radially from the center portion on the front surface of the chuck main body (11). A guide frame (14), (14), (14) is provided with a holder frame (151) for a breeding holder (15) slidably, and these holder frames (151) (151) are 2) It can be moved along the guide groove (14) by the hydraulic pressure supplied from the tip of the main shaft (21). As described above, the sliders (121) and (121) can be inserted into the guide grooves (152) and (152) of the holder frames (151) and (151).

Next, the actual use of the chuck adapter according to the above embodiment will be described. When attaching the chuck adapter (3) to the three-way jaw chuck in the state shown in FIG. 7 to form a two-way jaw, first remove the fixing bolts (16) (16) shown in FIG. 13) (13) and (13) are formed and removed from the holders (15) and (15). Then, as shown in FIG. 1, only the chuck main body (11) is attached to the main shaft (21) of the lathe (2).

Next, the base (31) of the chuck adapter (3)
The mounting bolts (18) (18) on the chuck main body (11) side corresponding to the bolt tightening holes (37), (37), (30) and (30) are removed. Then, the back surface of the base (31) is overlapped with the front surface of the chuck main body (11). Specifically, a notch (32) or a concave groove (34) (34) formed in the base (31) has a holder frame for the breeding holders (15) (15) projecting from the front surface of the chuck body (11). (151) The base (31) is superimposed on the front surface of the chuck main body (11) so as to fit onto (151).

Next, the removed mounting bolts (18) and (18)
Through the bolt fastening holes (37), (37), (30), (30) of the base (31), and the chuck body (37), (37), (30), (30) corresponding to the bolt fastening holes (37), (30), (30). 11) Side bolt tightening hole (113) (113) (Mounting bolt
(18) and (18) are screwed into the removed fastening holes (113). Incidentally, a bolt having an appropriate length in consideration of the thickness of the base (31) of the chuck adapter (3) may be separately prepared, and this bolt may be used in place of the mounting bolts (18) and (18).

Next, one growing holder (15) loaded in the chuck body (11) (in FIG. 1, a growing holder (1) provided to extend downward from the center of the chuck body (11)).
Using 5)), the first birth (62) is attached to this one bud holder (15). That is, the first birth (62) and the holder frame (151) are overlapped so that the serration (150) of the holder frame (151) and the serration (622) of the first birth (62) mesh with each other. Then, the bolt tightening hole (6
23) The slider (121) in the holder frame (151) (inserted into the guide groove (152) of the holder frame (151) as shown by the imaginary line in FIG. 4) through (623). Screw hole (120) (1
The fixing bolts (624) (624) are screwed into the portion (20) to thereby fix the first sprout (62) to the sprout holder (15).

Next, the holder frame (43) constituting the growing holder (40) is fitted into the holder mounting groove (36) of the base (31), and the bolt insertion hole ( 43
5) Screw the bolts (41) and (41) into the screw holes (38) and (38) on the side of (435) and the base (31). At this time, the positioning mark displayed on the mounting flange (434) protruding from the side of the holder frame (43)
The holder frame (43) is set at a predetermined position by aligning (439) with a specific scale (319) on the surface of the base (31). Note that the fine adjustment bolt is inserted into the screw hole (39) on the outer circumference of the base (31).
When the screw (51) is screwed in and the screwing amount of the fine adjustment bolt (51) is adjusted, the projecting shaft (436) on the back surface of the holder frame (43) is pushed by the tip of the fine adjustment bolt (51), By the holder frame (43)
Can be fine-tuned.

Next, the slider (42) is inserted into the guide groove (431) of the holder frame (43), while the serrations (433) and (433) on the front surface of the holder frame (43) form the second spring (61). ) Lay the serrations (612) and (612) on the back so that they mesh with each other, and then attach the fixing bolts (614) and (614) to the bolt tightening holes (613) and (613).
Then, it is screwed into the screw hole (420) (420) of the slider (42) and tightened. Note that the slider (42) has a guide groove (43
1), the second sprout (61) moves radially from the center of the base (31), that is, the rotation center of the chuck mounted on the lathe (2). It will be possible to make it.

When the tightening of the fixing bolts (614) (614) is completed, as shown by the imaginary line in FIG. 5, a second sprout (61) is formed through the sprout holder (40). As shown in FIG. 6, it is mounted on the base (31) of the chuck adapter (3), and is fixed to the chuck main body (11) side. The first birth (62) can be changed to a two-sided claw type facing the first birth (62). Then, with the hydraulic pressure supplied from the lathe (2), the forming holder (1) on the chuck main body (11) side is used.
5) can be moved along the guide groove (14),
The first pinion (62) attached to (11) moves in the radial direction, whereby the first pinion (62) and the second pinion (61) pinch, for example, a square pillar-shaped workpiece. This can be processed.

When returning from the state of the two-way nail to the state of the three-way nail, the chuck adapter (3) is removed from the chuck body (11) in the reverse order to the above. And mounting bolt (18)
The mounting bolts (18) and (18) are screwed into the bolt tightening holes (113) and (113) of the chuck main body (11) into which the (18) is not screwed, and the chuck main body (11) is fixed. Then, the chuck main body (11) is in the state shown in FIG. 1, and the sliders (121) and (121) are inserted into the holder frames (151) and (151) provided in the chuck main body (11) (the imaginary line in FIG. 4). 7), and screw holes (120) (120) formed at the tip thereof are formed as shown in FIG.
When (13) is fixed with fixing bolts (16) and (16), as shown in the figure,
The three-way jaw chuck returns to the initial state attached to the spindle (21) of the lathe (2).

As described above, according to the chuck adapter (3), it is possible to change the chuck attached to the lathe (2) to a type having a different number of claws without attaching / detaching the chuck. In the above-described embodiment, only one set of the assembly of the position-adjustable sprout holder (40) and the second sprout (61) fixed thereto is provided on the base (31). An assembly of a growing holder (40) and a second growing (61) is circumferentially arranged in three sets at 90 ° intervals on the front surface of the base (31), and the second set is formed at 90 ° intervals. The work can be clamped from all directions with the first sprout (62) attached to the chuck body (11) mounted on the lathe (2) and the sprout (61) (61) (61). Chuck adapter that can be changed to a jaw type chuck
(3) may be used.

In the above embodiment, when changing the three-way jaw chuck mounted on the lathe (2) to the two-way jaw type,
The specific bud (13) provided in the chuck body (11) was replaced with a first bud (62) having a different height and shape from this.
If the workpiece can be clamped together with the second bobbin (61) of the bobbin holder (40), one of the bobbins (13), (13) and (13) shown in FIG. May be used as it is. Alternatively, one burring (13) removed from the chuck body (11) may be attached to the burring holder (40) of the chuck adapter (3).

[Brief description of the drawings]

FIG. 1 shows a chuck adapter according to an embodiment of the present invention.
(3) Exploded perspective view showing the chuck main body (11) of the chuck for mounting the same.

FIG. 2 is a rear view showing a state where a fine adjustment bolt (51) is attached to the base (31) of FIG. 1;

FIG. 3 is a longitudinal sectional view of a holder frame (43) appearing in FIG. 1;

FIG. 4 is an end view of a holder frame (151) mounted on a chuck main body (11) of a chuck mounted on a lathe (2).

FIG. 5 is a chuck adapter according to the embodiment of the present invention;
Sectional view of main part with holder frame (43) mounted on base (31) of (3)

FIG. 6 is a chuck adapter according to the embodiment of the present invention.
(3) is a perspective view of a state in which the chuck (11) is already attached to the lathe (2) and is attached to the chuck main body (11).

FIG. 7 is a perspective view showing a state where a three-way jaw chuck is attached to a main shaft (21) of a lathe (2).

[Explanation of symbols]

 (2) ・ ・ ・ Lathe (18) ・ ・ ・ Mounting bolt (40) ・ ・ ・ Growing holder (61) ・ ・ ・ Second growing (62) ・ ・ ・ First growing

Claims (6)

[Claims] 1. A lathe chuck adapter detachably attached to a workpiece holding side end of a chuck attached to a lathe (2), the chuck adapter being attached to the workpiece holding side end of the chuck. A chuck adapter for a lathe, comprising: a space for allowing movement of a first sprout; and a sprung holder (40) for holding a second sprout for holding a workpiece in cooperation with the first sprout. 2. The sprout holder according to claim 1, wherein the sprout holder holds the second sprout so as to be able to move the second sprout in a radial direction from a rotation center of the chuck. Lathe chuck adapter. 3. The number of the sprout holders (40) provided is single, and when the sprout holder (40) holds the second sprout, the second sprout becomes the same as the first sprout. The chuck adapter for a lathe according to claim 1 or 2, wherein the chuck adapter for the lathe is opposed from the radial direction with the rotation center interposed therebetween. 4. The chuck adapter for a lathe according to claim 1, wherein said chuck adapter is attached to said lathe (2) together with said chuck by a common mounting bolt (18). 5. The chuck adapter for a lathe according to claim 1, wherein said second sprout is detachably attached to said sprout holder (40). 6. A chuck attached to an end of the main shaft (21) and having a first bud movable at an end of the tool holding side;
A lathe having a space for allowing movement of the first bobbin and a lathe chuck adapter having a second bobbin and detachably attached to the workpiece holding side end of the chuck; A lathe that grips a workpiece between the second birth and the first birth.