WO2019181847A1

WO2019181847A1 - Chuck mechanism and method for manufacturing same

Info

Publication number: WO2019181847A1
Application number: PCT/JP2019/011164
Authority: WO
Inventors: 民和西宮
Original assignee: 株式会社北川鉄工所
Priority date: 2018-03-22
Filing date: 2019-03-18
Publication date: 2019-09-26
Also published as: TW201940264A; JP7278258B2; JPWO2019181847A1

Abstract

The purpose of the present invention is to provide: chuck mechanism in which appearance is not impaired even if a chamfered section for improving safety is formed; and a method for manufacturing the chuck mechanism. This chuck mechanism is provided with a chuck body. The chuck body has a front surface, a first chamfered section, an outer peripheral surface, and a groove section. A jaw for gripping a workpiece is installed on the front surface. The first chamfered section is formed in a curved surface-like shape between a peripheral edge section of the front surface and the outer peripheral surface. The groove section has a first groove section. The first groove section is formed on the front surface side of the first chamfered section, extends in the circumferential direction of the chuck body, and has a ring-like shape.

Description

Chuck mechanism and manufacturing method thereof

The present invention relates to a chuck mechanism for grasping a workpiece (work) and a manufacturing method thereof.

The chuck mechanism includes a chuck main body and a plurality of jaws that are installed on the front surface of the chuck main body so as to be movable in the radial direction and grasp a workpiece.

The chuck body has a cylindrical shape made of metal, and from the viewpoint of safety, the boundary portion between the peripheral edge portion and the outer peripheral surface of the front surface of the chuck body forms a planar chamfered portion (for example, Patent Document 1).

JP 2014-172172 A

However, even if a flat chamfered portion is provided at the boundary portion, the chamfered portion itself is still sharp in the case of a chamfered portion having a small size. On the other hand, even in the case of a chamfered portion having a large size, the corners at both corners are sharp. Therefore, the chuck mechanism may be replaced and attached manually, and in that case, the chuck mechanism may hit the chamfered portion to cause injury.

Therefore, the inventors of the present application paid attention to providing a curved chamfered portion at the boundary portion in order to further improve safety.

However, in the manufacturing process of the chuck mechanism, the finishing process is generally performed after the molding process. At that time, the curved chamfered portion is formed in the molding process, but when the process shifts from the molding process to the finishing process, it is generally performed by changing to another machine. In other words, it is inevitable that a repositioning at the time of machining setup causes a misalignment amount due to a slight misalignment of the workpiece or a slight inclination. In order to shift to the finishing process in such a state, the boundary line between the curved chamfered portion and the front surface of the chuck body, or the curved chamfered portion and the outer peripheral surface is greatly displaced depending on the location. End up. For example, the boundary line between the finishing surface of the front surface of the chuck body and the chamfered portion having a curved surface may be eccentric with respect to the center of the chuck body. Further, the boundary line between the finished surface and the curved chamfered portion on the outer peripheral surface of the chuck body may be inclined with respect to the axial direction of the chuck body.

In this way, even if the boundary line between the finished surface and the chamfered portion of the curved surface on the front surface and outer peripheral surface of the chuck main body is a slight misalignment amount due to re-installation, a large misalignment may occur depending on the location. There arises a problem that the deviation of the boundary line is noticeable in appearance.

The present invention has been made in view of the above points, and provides a chuck mechanism and a method for manufacturing the same that can prevent the appearance from being impaired even when a chamfered portion for improving safety is formed. It is aimed.

According to the present invention, there is provided a chuck mechanism including a chuck body, the chuck body having a front surface, a first chamfered portion, an outer peripheral surface, and a groove portion, The jaw for grasping the workpiece is installed, the first chamfered portion is formed in a curved shape, and the first chamfered portion is formed between the peripheral edge portion of the front surface and the outer peripheral surface, The groove portion includes a first groove portion, the first groove portion is formed on the front surface side of the first chamfered portion, and the first groove portion extends along a circumferential direction of the chuck body, A chuck mechanism is provided.

Preferably, the groove portion includes a second groove portion, the second groove portion is formed on the outer peripheral surface side of the first chamfered portion, and the second groove portion extends along the circumferential direction and has a ring shape. A chuck mechanism is provided.
Preferably, the first chamfered portion and the groove portion are formed by a molding surface of the chuck body,
A chuck mechanism is provided in which the front surface and the outer peripheral surface are made of a finished surface.
Preferably, the chuck body has a back surface and a second chamfered portion, the back surface is formed on the chuck body on the side opposite to the front surface, and the second chamfered portion has a curved surface shape. And is formed between a peripheral edge portion on the back surface and the outer peripheral surface, the groove portion has third and fourth groove portions, and the third groove portion is formed on the back surface side of the second chamfered portion. Formed and extends along the circumferential direction to form a ring shape, and the fourth groove portion is formed on the outer peripheral surface side of the second chamfered portion and extends along the circumferential direction to form a ring shape. A chuck mechanism is provided.
Preferably, a chuck mechanism is provided in which the groove portion has an arc shape or a V shape in a sectional view.
According to another aspect of the embodiment, there is provided a manufacturing method of a chuck mechanism in which a jaw for grasping a workpiece is installed on a front surface of a chuck body, and a peripheral portion on the front surface of the chuck body. Forming a portion between the chuck body and the outer peripheral surface, forming a curved chamfered portion in the portion, and after the forming step, the front surface and the outer peripheral surface A finishing process for finishing, and the forming process includes a step of forming a groove in the formed chamfered portion, and in the step of forming the groove, the groove is the chamfered portion of the chamfered portion. A method of manufacturing a chuck mechanism is provided which is formed on the front surface side and extends along the circumferential direction of the chuck body so as to form a ring shape.
Preferably, a method for manufacturing a chuck mechanism is provided in which the groove is formed in an arc shape or a V shape in a cross-sectional view.

According to the present invention, the first groove portion is formed on the front surface side of the first chamfered portion, and the first groove portion extends along the circumferential direction of the chuck body and forms a ring shape. Since such a first groove is formed in the chuck body, the connection position (boundary line) between the front surface and the first groove is sharp. Here, when finishing of the front surface is performed, the displacement direction of the connection position between the front surface and the first groove is the direction perpendicular to the front surface and the radial direction of the front surface. And divided. In the present invention, since the connection position between the front surface and the first groove portion is sharp, the displacement amount of the connection position in the radial direction of the front surface is reduced. In other words, since the connection position between the front surface and the first groove portion is sharp, it is suppressed that the connection position (boundary line) between the front surface and the first groove portion is shifted before and after finishing the front surface. Is done. Thus, according to the present invention, even if the first chamfered portion for improving safety is formed in the chuck body, the connection position (boundary) between the front surface and the first groove portion before and after finishing processing. (Line) is suppressed from shifting, and as a result, it is avoided that the appearance of the chuck body is impaired.

It is the perspective view which showed typically the structure of the conventional general chuck mechanism. It is the side view which expanded the peripheral part vicinity of the peripheral part in the front surface of a chuck | zipper main body, and the outer peripheral surface of a chuck | zipper main body, and is the figure which showed the state which formed the chamfered part of the curved surface shape in the boundary part. FIG. 3 is a view showing a state in which the front surface of the chuck body is finished after the chamfered portion shown in FIG. 2 is formed. It is the front view which showed the boundary line of the front surface and chamfering part of a chuck | zipper main body after finishing. It is the perspective view which showed the boundary line of the outer peripheral surface of a chuck | zipper main body after a finishing process, and a chamfer. In the chuck mechanism in one embodiment of the present invention, it is an enlarged side view of the vicinity of the boundary between the peripheral portion of the front surface of the chuck body and the outer peripheral surface of the chuck body. In the chuck mechanism in this embodiment, it is the enlarged view which showed the state which finished the front surface of the chuck | zipper main body. It is the perspective view which showed typically the structure of the chuck mechanism in this embodiment. It is the front view which looked at the chuck mechanism shown in Drawing 8 from the top jaw side. FIG. 9 is a partial side view of the chuck mechanism shown in FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention.

FIG. 1 is a perspective view schematically showing a configuration of a conventional general chuck mechanism.

As shown in FIG. 1, the chuck mechanism 1 includes a chuck main body 10, a plurality of master jaws 20 installed on the front surface 11 of the chuck main body 10 so as to be movable in the radial direction, and each of the master jaws 20. A top jaw 30 is detachably attached to the front surface.

The chuck body 10 has a cylindrical shape made of metal. A boundary portion 13 between the peripheral edge portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10 is formed with a small chamfered portion having a planar shape with a small dimension.

FIG. 2 is an enlarged side view of the vicinity of the boundary portion 13 between the peripheral edge portion of the front surface 11 of the chuck main body 10 and the outer peripheral surface 12 of the chuck main body 10. A state in which a 40) is simply formed is shown. Here, the symbol P indicates a boundary line between the front surface 11 and the outer peripheral surface 12 of the chuck body and the chamfered portion 40.

As described above, in the manufacturing process of the chuck mechanism, the chamfered portion 40 is formed in the molding process, and then the finishing process of the front surface 11 and the outer peripheral surface 12 of the chuck body is performed in the finishing process. At that time, when shifting from the molding process to the finishing process, it is common to transfer it to another machine, so there is a slight misalignment, a slight inclination, etc. due to the reattachment of the chuck body. For this reason, it is inevitable that a deviation occurs in the finishing process.

FIG. 3 is an enlarged view illustrating a state in which a deviation occurs in the boundary line P between the front surface 11 and the chamfered portion 40 of the chuck body when a deviation occurs in the finishing process. Here, a case where a slight finishing deviation D occurs on the finishing surfaces 11 and 11 ′ of the front surface of the chuck body due to a slight misalignment when the chuck body is reinstalled is illustrated.

As shown in FIG. 3, even if the finishing deviation D is slight, a large deviation L1 occurs at the boundary lines P and Q between the front surface 11 and the chamfered portion 40 of the chuck body. This is because the finishing surface of the front surface 11 of the chuck body is substantially parallel to the tangent line of the chamfered portion 40 in the vicinity of the boundary line.

Such a large shift L1 also occurs at the boundary line between the outer peripheral surface 12 and the chamfered portion 40 of the chuck body. Further, such a large shift L1 is also caused by a slight amount of inclination when the chuck body is remounted.

As a result, as shown in FIG. 4, there arises a problem that the boundary line Q 1 between the front surface 11 and the chamfered portion 40 of the chuck body 10 after finishing is eccentric with respect to the center O of the chuck body 10. Further, as shown in FIG. 5, there arises a problem that the boundary line Q 2 between the outer peripheral surface 12 of the chuck main body 10 and the chamfered portion 40 after the finishing is inclined with respect to the axial direction of the chuck main body 10. In FIG. 5, the boundary line Q1 between the front surface 11 and the chamfered portion 40 of the chuck body 10 after finishing is shown as being not eccentric with respect to the center O in FIG.

In this way, when the positions of the boundary lines Q1 and Q2 between the finished surface of the front surface 11 and the outer peripheral surface 12 of the chuck body 10 and the chamfered portion 40 are greatly displaced depending on the location, the boundary lines Q1 and Q2 are generated. This is not preferable in terms of appearance.

The present invention has been made to solve such problems. The configuration of the chuck mechanism according to the present invention will be described below with reference to the drawings.

FIG. 6 is an enlarged side view of the vicinity of the boundary between the peripheral edge of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10 in the chuck mechanism according to the embodiment of the present invention.

As shown in FIG. 6, a curved chamfered portion 40 is formed at the boundary between the peripheral edge portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. The chamfered portion 40 is a surface formed by molding (molding surface). Further, the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are surfaces (finished surfaces) that have been finished after the chamfered portion 40 is formed.

In the present embodiment, in the chamfered portion 40,

groove portions

50A and 50B are provided on the front surface 11 side of the chuck body 10 and the outer peripheral surface 12 side of the chuck body 10, respectively. That is, the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are connected to the chamfered portion 40 through the

groove portions

50A and 50B, respectively. The

groove portions

50A and 50B are each formed in a ring shape along the circumferential direction. Further, the

groove portions

50A and 50B are formed in the molding process, similarly to the chamfered portion 40. The chamfered portion 40 on the front surface 11 side of the chuck body 10 corresponds to the first chamfered portion. Further, the groove portion 50A on the front surface 11 side of the chuck body 10 corresponds to the first groove portion, and the groove portion 50B on the front surface 11 side of the chuck body 10 corresponds to the second groove portion.

In this embodiment, since the

groove portions

50A and 50B are connected to the front surface 11 and the outer peripheral surface 12 of the chuck body 10, the boundary between the front surface 11 and the groove portion 50A of the chuck body 10 and the chuck body 10 A boundary line appears at the boundary between the outer peripheral surface 12 and the groove 50B.

FIG. 7 is an enlarged view showing the deviation of the boundary line between the front surface 11 of the chuck main body and the groove portion 50A when a deviation occurs in the finishing process in the present embodiment, as shown in FIG. FIG. Here, a case where a slight finishing deviation D occurs on the finishing surfaces 11 and 11 ′ of the front surface of the chuck body due to a slight misalignment when the chuck body is reinstalled is illustrated.

As shown in FIG. 7, even if the finishing deviation D occurs, only a slight deviation L2 occurs on the boundary lines P and Q between the front surface 11 of the chuck body and the groove 50A. Specifically, the amount of deviation from the boundary line P to the boundary line Q is divided into a deviation in the direction orthogonal to the front surface 11 and a deviation in the radial direction of the front surface (corresponding to the deviation L2). . When FIG. 3 showing the conventional configuration and FIG. 7 showing the configuration of the embodiment are compared, in the embodiment, the radial displacement (corresponding to the displacement L2) of the front surface is suppressed. Such an effect is obtained because the connection portion between the finished surface of the front surface 11 of the chuck body and the groove 50A is sharp. In other words, this is because the angle formed by the finished surface of the front surface 11 of the chuck body and the tangent line (line connecting P and Q) of the groove 50A in the vicinity of the boundary line is large.

As shown in FIG. 7, a boundary line R appears also in the chamfered portion 40 and the groove portion 50A, but the position of the boundary line R is below the surface S corresponding to the maximum deviation in finishing (on the side in the finishing direction). ) Is preferable. Thereby, since the boundary line R is not finished, it is possible to prevent the boundary line R from being displaced.

Similarly, even if the finishing deviation D occurs, only a slight deviation occurs on the boundary line between the outer peripheral surface 12 of the chuck body and the groove 50B. Further, even if a finishing process deviation occurs due to a slight amount of inclination when the chuck body is remounted, only a slight deviation occurs on the boundary line between the outer peripheral surface 12 of the chuck body and the groove 50B.

According to the present embodiment, the chamfered portion 40 having a curved shape is provided at the boundary between the peripheral edge portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. By providing ring-shaped

grooves

50A and 50B along the circumferential direction on the front surface 11 side of the main body 10 and on the outer peripheral surface 12 side of the chuck main body 10, respectively, the front surface 11 of the chuck main body 10 and When finishing the outer peripheral surface 12, even if a finishing deviation occurs, it is possible to prevent a large deviation from occurring in the boundary lines between the front surface 11 and the outer peripheral surface 12 of the chuck body 10 and the grooves 50 A and 50 B. can do. Therefore, such a boundary line is decentered with respect to the center of the chuck body 10 in a front view, or is slanted with respect to the axial direction of the chuck body 10 in a side view, and is noticeable in appearance. Can be solved. As a result, it is possible to provide the chuck mechanism 1 including the chuck body 10 having a chamfered portion that is safe and excellent in appearance.

In addition, in this embodiment, although the shape of

groove part

50A, 50B is not specifically limited, As shown in FIG. 7, it is preferable to have comprised circular arc shape or V shape by sectional view. Thereby, sharp corners are not formed at the boundary between the groove 50A and the front surface 11 and at the boundary between the groove 50B and the outer peripheral surface 12. This also makes it difficult for chips to get caught. In addition, the appearance is also beautiful.

The “arc shape” includes an “elliptical arc shape”, and the “V shape” includes a boundary portion between the groove portion 50A and the front surface 11, and a boundary portion between the groove portion 50B and the outer peripheral surface 12. However, those having an R shape are also included.

FIG. 8 is a perspective view schematically showing the configuration of the chuck mechanism in the present embodiment.

As shown in FIG. 8, the chuck mechanism 1 in the present embodiment includes a chuck body 10, a plurality of master jaws 20 installed on the front surface 11 of the chuck body 10 so as to be movable in the radial direction, and each master. A top jaw 30 is detachably attached to the front surface of the jaw 20.

The chuck body 10 has a cylindrical shape made of metal, and a curved chamfered portion 40 is provided at the boundary between the peripheral edge portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. It has been. As shown in FIG. 6, the chamfered portion 40 has a ring-shaped groove 50 A along the circumferential direction on the front surface 11 side of the chuck body 10 and the outer peripheral surface 12 side of the chuck body 10. , 50B are provided.

FIG. 9 is a front view of the chuck mechanism 1 shown in FIG. 8 viewed from the top jaw 30 side.

As shown in FIG. 9, when the external appearance of the chuck mechanism 1 is viewed from the front, a ring-shaped groove 50 A is visually recognized at the peripheral edge of the front surface 11 of the chuck main body 10. The boundary line between the surface 11 and the groove 50A is not greatly displaced depending on the location. Therefore, such a boundary line is not deviated from the center of the chuck body 10 and is not conspicuous in appearance.

FIG. 10 is a partial side view of the chuck mechanism 1 shown in FIG.

As shown in FIG. 10, when the appearance of the chuck mechanism 1 is viewed from the side, a ring-shaped groove 50 B is visually recognized at the end of the outer peripheral surface 12 of the chuck main body 10. The boundary line with 50B does not deviate greatly depending on the location. For this reason, the boundary line is not inclined with respect to the axial direction of the chuck body 10 and is not noticeable in appearance.

In the present embodiment, a curved chamfered portion 40 is also provided at the boundary between the peripheral edge portion of the back surface 14 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. Ring-shaped

grooves

50A and 50B are provided along the circumferential direction on the back surface 14 side and the outer peripheral surface 12 side of the chuck body 10, respectively. The chamfer 40 on the back surface 14 side of the chuck body 10 corresponds to the second chamfer. Further, the groove portion 50A on the back surface 14 side of the chuck body 10 corresponds to the third groove portion, and the groove portion 50B on the back surface 14 side of the chuck body 10 corresponds to the fourth groove portion. In addition, since the back surface 14 of the chuck | zipper main body 10 has few scenes seen by external appearance, it is not necessary to provide the groove part 50A.

According to the present embodiment, the chamfered portion 40 having a curved surface is provided at the boundary portion between the peripheral edge portion of the front surface 11 (or the back surface 14) of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10, In the chamfered portion 40, ring-shaped grooves 50 A and 50 B are provided along the circumferential direction on the front surface 11 (and further on the back surface 14) side of the chuck main body 10 and the outer peripheral surface 12 side of the chuck main body, respectively. Thus, it is possible to provide the chuck mechanism 1 including the chuck body 10 having a chamfered portion that is safe and has an excellent appearance.

Further, the chuck mechanism 1 in the present embodiment can be manufactured by the following method.

First, a curved chamfered portion 40 is formed at a boundary portion between the peripheral edge portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. The chamfered portion 40 is formed in a molding process step in which the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are molded (rough machining leaving a finishing allowance).

Next, after the molding process, the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are finished (finishing process).

In the present embodiment, as shown in FIG. 6, in the molding process, both ends of the chamfered portion 40 (the front surface 11 side of the chuck body 10 and the outer peripheral surface 12 side of the chuck body 10) are arranged in the circumferential direction. Along with this, ring-shaped

grooves

50A and 50B are formed.

In addition, it is preferable to form

groove part

50A, 50B in circular arc shape or V shape by sectional view. Here, “arc-shaped” includes “elliptical arc”, and “V-shaped” includes a groove 50A and the front surface 11 and a boundary between the groove 50B and the outer peripheral surface 12 as R Including those in the shape.

As mentioned above, although this invention has been demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the above embodiment, the specific shape of the chamfered portion 40 is not particularly limited as long as the chamfered portion 40 has a curved surface shape. For example, the cross-sectional view may be an arc shape or an elliptical arc shape.

Further, in the present embodiment, the forming process includes a turning process, a machining process, a press process, a three-dimensional modeling, a mold forming, and the like. The finishing process includes high-precision cutting, grinding, polishing, and the like.

In addition, the dimensions shown in each of the above drawings are changed as appropriate for easy understanding of the explanation, and do not represent actual dimensions.

In the present embodiment, both the groove 50A (first groove) and the groove 50B (second groove) are formed in the chamfered portion 40 (first chamfered portion) on the front surface 11 side of the chuck body 10. Although a form was demonstrated, it is not limited to this. Only the groove 50A (first groove) may be formed in the chamfered portion 40 (first chamfered portion) on the front surface 11 side of the chuck body 10. Also in this case, an effect corresponding to the effect exhibited in the embodiment can be obtained.

1 Chuck mechanism
10 Chuck body
11 Front side of chuck body
12 Outer peripheral surface of chuck body
14 Back side of chuck body
20 Master Joe
30 Top Joe
40 Chamfer
50A, 50B Groove

Claims

A chuck mechanism having a chuck body,
The chuck body has a front surface, a first chamfered portion, an outer peripheral surface, and a groove portion,
On the front surface, a jaw that grasps the workpiece is installed,
The first chamfered portion is formed in a curved shape, and the first chamfered portion is formed between a peripheral edge portion of the front surface and the outer peripheral surface,
The groove has a first groove,
The first groove portion is formed on the front surface side of the first chamfered portion, and the first groove portion extends in the circumferential direction of the chuck body and has a ring shape.
The chuck mechanism according to claim 1,
The groove has a second groove,
The chuck mechanism, wherein the second groove portion is formed on the outer peripheral surface side of the first chamfered portion, and the second groove portion extends in the circumferential direction and forms a ring shape.
The chuck mechanism according to claim 1 or 2,
The first chamfered portion and the groove portion are formed from a molding surface of the chuck body,
The chuck mechanism, wherein the front surface and the outer peripheral surface are made of a finished surface.
A chuck mechanism according to any one of claims 1 to 3,
The chuck body has a back surface and a second chamfered portion,
The back surface is formed on the chuck body on the side opposite to the front surface,
The second chamfered portion is formed in a curved shape, and is formed between the peripheral edge portion on the back surface and the outer peripheral surface,
The groove has third and fourth grooves,
The third groove portion is formed on the back surface side of the second chamfered portion and extends along the circumferential direction to form a ring shape.
The fourth groove portion is a chuck mechanism that is formed on the outer peripheral surface side of the second chamfered portion and extends along the circumferential direction to form a ring shape.
A chuck mechanism according to any one of claims 1 to 4,
The said groove part is a chuck mechanism which has comprised circular arc shape or V shape by sectional view.
A chuck mechanism manufacturing method in which a jaw for grasping a workpiece is installed on the front surface of a chuck body,
A molding process for molding a portion between a peripheral edge portion of the front surface of the chuck body and an outer peripheral surface of the chuck body, and forming a curved chamfered portion on the portion;
A finishing process for finishing the front surface and the outer peripheral surface after the molding process,
The molding process includes a step of forming a groove in the formed chamfered portion,
In the step of forming the groove portion, the groove portion is formed on the front surface side of the chamfered portion, and extends along the circumferential direction of the chuck main body so as to form a ring shape. Mechanism manufacturing method.
It is a manufacturing method of the chuck mechanism according to claim 6,
The method of manufacturing a chuck mechanism, wherein the groove is formed in an arc shape or a V shape in a cross-sectional view.