TW201940264A - Chuck mechanism and method for manufacturing same - Google Patents

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 processed object (workpiece) and a manufacturing method thereof.

The chuck mechanism includes a chuck body and a plurality of chucks, which are movably disposed on the front surface of the chuck body for gripping a workpiece.

The chuck body has a cylindrical shape made of metal, and from the viewpoint of safety, a flat-shaped chamfered portion is formed at a boundary portion between the peripheral portion of the front surface of the chuck body and the outer peripheral surface (for example, Patent Document 1).

    [Existing technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Application Laid-Open No. 2014-172172

However, even if a flat-shaped chamfered portion is provided at the boundary portion, when the chamfered portion is a small size, the chamfered portion itself is sharp. When the chamfered portion is large, both corners become sharp. The chuck mechanism may need to be replaced manually and installed, and it may touch a sharp chamfered part during operation and may be injured.

Therefore, in order to further improve the safety, the present inventors focused on providing a beveled portion having a curved shape at the boundary portion.

However, in the manufacturing steps of the chuck mechanism, the finishing step is generally performed after the forming step. At this time, the chamfered portion of the curved shape is formed in the forming process step. However, when transferring from the forming process step to the finishing step, it is usually replaced with another device. That is to say, re-installation during processing cannot avoid the occurrence of positioning offset caused by slight eccentricity or slight tilt of the workpiece. Since the transition to the finishing step in this state, the curved line of the chamfered portion and the front face of the chuck body; or the boundary line of the curved portion of the chamfered portion and the outer peripheral surface may be greatly displaced due to different positions. . For example, the boundary line between the finished surface on the front surface of the chuck body and the chamfered portion of the curved shape may be eccentric with respect to the center of the chuck body. In addition, the boundary line between the finished surface of the chuck body outer peripheral surface and the chamfered portion of the curved shape may be inclined with respect to the axial direction of the chuck body.

As a result, even if the boundary between the front surface of the chuck body, the finished surface and the chamfered portion of the curved shape of the curved surface is small, the positional displacement will be large, and the position will be greatly displaced. The offset of the boundary line is obvious in appearance.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a chuck mechanism capable of preventing the appearance from being damaged even if a chamfered portion for improving safety is formed, and a method of manufacturing the same.

According to the present invention, there is provided a chuck mechanism having a chuck body having a front surface, a first chamfered portion, an outer peripheral surface, and a groove portion. The front surface is provided with a clamping jaw for gripping a workpiece. The chamfered portion is formed in a curved shape, and a first chamfered portion is formed between a peripheral portion of the front surface and the outer peripheral surface. The groove portion has a first groove portion, and the first groove portion is formed in the first chamfer. The first groove portion extends in the circumferential direction of the chuck body to form a ring shape.

It is preferable that the chuck mechanism has a second groove portion, and the second groove portion is formed on the outer peripheral surface side of the first chamfered portion. The second groove portion extends in the circumferential direction to form a ring shape.

A chuck mechanism is provided, wherein the first chamfered portion and the groove portion are preferably formed of a processed surface of the chuck body, and the front surface and the outer peripheral surface are formed of a finished surface.

A chuck mechanism is provided, preferably, the chuck body has a back surface and a second chamfered portion, the back surface is formed on the chuck body on the opposite side of the front surface, and the second chamfered portion is formed into a curved shape, and And formed between the peripheral portion of 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 side of the second chamfered portion, and extends along the A circumferential direction extends to form a ring shape, and a fourth groove portion is formed on the outer peripheral surface side of the second chamfered portion, and extends in the circumferential direction to form a ring shape.

A chuck mechanism is provided, and the groove portion is preferably arc-shaped or V-shaped when viewed in cross section.

According to another aspect of the embodiment, a method for manufacturing a chuck mechanism is provided. The chuck mechanism is provided with a clamping jaw for grasping a workpiece on the front surface of the chuck main body. The manufacturing method includes a forming process step for clamping the chuck. A portion between the peripheral portion of the front surface of the disk body and the outer peripheral surface of the chuck body is subjected to molding processing to form a chamfered portion in a curved shape at the portion; and a finishing step, after the forming processing step, The front surface and the outer peripheral surface are finished, and the forming step includes a step of forming a groove portion in the formed chamfered portion. In the step of forming the groove portion, the groove portion is formed in the groove portion. The front side of the chamfered portion extends in a ring shape along a circumferential direction of the chuck body.

A method for manufacturing a chuck mechanism is provided, and the groove portion is preferably 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 side of the first chamfered portion, and the first groove portion extends in a ring shape along the circumferential direction of the chuck body. Since the first groove portion is formed in the chuck body, the connection position (boundary line) between the front surface and the first groove portion is sharp. Here, when the front surface finishing is performed, the displacement direction of the connection position between the front surface and the first groove portion is divided into a direction orthogonal to the front surface and a radial direction of the front surface. 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 small. In other words, since the connection position between the front surface and the first groove portion is sharp, the connection position (boundary line) between the front surface and the first groove portion can be suppressed from shifting before and after the front surface finishing. Therefore, according to the present invention, even if the first chamfered portion for improving safety is formed on the chuck body, the connection position (boundary line) between the front surface and the first groove portion before and after finishing can be prevented from shifting, which As a result, damage to the appearance of the chuck body can be avoided.

1‧‧‧ chuck mechanism

10‧‧‧ Chuck body

11‧‧‧ Front side of chuck body

12‧‧‧ Outer peripheral surface of chuck body

14‧‧‧ The back of the chuck body

20‧‧‧Main jaw

30‧‧‧ Top claw

40‧‧‧Chamfer

50A, 50B‧‧‧Slot

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

FIG. 2 is an enlarged side view of the vicinity of a boundary portion of the front surface of the chuck main body and the vicinity of a boundary portion of the outer peripheral surface of the chuck main body, and shows a state in which a curved portion is formed at the boundary portion.

FIG. 3 is a view showing a state where the front surface of the chuck body is finished after forming the chamfered portion shown in FIG. 2.

FIG. 4 is a front view showing a boundary line between the front surface of the chuck body and the chamfered portion after finishing processing.

FIG. 5 is a perspective view showing a boundary line between the outer peripheral surface of the chuck body and the chamfered portion after finishing processing.

FIG. 6 is an enlarged side view of a chuck mechanism according to an embodiment of the present invention, with a peripheral portion of the front surface of the chuck body and a vicinity of a boundary portion of an outer peripheral surface of the chuck body enlarged.

FIG. 7 is an enlarged view showing a state where the front surface of the chuck body is finished in the chuck mechanism according to the present embodiment.

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

FIG. 9 is a front view when the chuck mechanism shown in FIG. 8 is viewed from the top claw side.

Fig. 10 is a partial side view of the chuck mechanism shown in Fig. 8.

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

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

As shown in FIG. 1, the chuck mechanism 1 includes a chuck body 10, a plurality of main jaws 20 that are movably provided on the front face 11 of the chuck body 10, and a top that can be detachably attached to the front face of each main jaw 20. Claw 30.

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

FIG. 2 is an enlarged side view of the vicinity of the boundary portion 13 of the chuck main body 10 front surface 11 and the outer peripheral surface 12 of the chuck main body 10, and shows that a curved shape chamfered portion (hereinafter referred to as "chamfer" "" 40). Here, the symbol P represents a boundary line between the chuck body front surface 11 and the outer peripheral surface 12 and the chamfered portion 40.

As described above, in the manufacturing step of the chuck mechanism, the chamfered portion 40 is formed in the molding processing step, and thereafter the finishing processing of the chuck body front surface 11 and the outer peripheral surface 12 is performed in the finishing processing step. At this time, when switching from the molding process step to the finishing step, it is usually replaced by other equipment. Therefore, the reinstallation of the chuck body may cause a slight eccentricity or a slight amount of tilt, so that the finishing process cannot be shifted.

FIG. 3 is an enlarged view illustrating a state in which a boundary line P between the chuck body front surface 11 and the chamfered portion 40 is shifted when the finishing is shifted. Here, a case where a slight finishing eccentricity D occurs on the finishing surfaces 11, 11 'on the front surface of the chuck body due to a slight eccentricity when the chuck body is remounted is exemplified.

As shown in FIG. 3, even if the finishing offset D is small, the boundary lines P and Q of the chuck body front surface 11 and the chamfered portion 40 will be greatly offset L1. This is because the finished surface of the chuck body front surface 11 is almost parallel to the tangent of the chamfered portion 40 near the boundary line.

Such a large offset L1 also occurs at the boundary line between the outer peripheral surface 12 of the chuck body and the chamfered portion 40. In addition, a slight tilt when the chuck body is reinstalled also causes such a large offset L1 to occur.

As a result, as shown in FIG. 4, a problem arises that the boundary line Q1 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. In addition, as shown in FIG. 5, a problem occurs in that the boundary line Q2 between the outer peripheral surface 12 of the chuck body 10 and the chamfered portion 40 after finishing is inclined with respect to the axial direction of the chuck body 10. In addition, FIG. 5 shows a state where the boundary line Q1 between the front surface 11 and the chamfered portion 40 of the chuck body 10 after finishing is not eccentric with respect to the center O in FIG. 4.

Therefore, if the positions of the boundary lines Q1 and Q2 of the front surface 11 and the outer peripheral surface 12 of the chuck body 10 and the chamfered portion 40 are largely shifted depending on the position, the positions of the boundary lines Q1 and Q2 are shifted. Obviously, the appearance is not good.

The present invention has been made to solve this problem. The structure of the chuck mechanism of 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 portion between the peripheral portion 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 portion 40 is formed at a boundary portion between the peripheral portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. In addition, the chamfered part 40 is a surface (molded surface) formed by a molding process. In addition, the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are surfaces (finished surfaces) subjected to finishing after forming the chamfered portion 40.

In the present embodiment, groove portions 50A and 50B are provided on the chamfered portion 40 on the front surface 11 side of the chuck body 10 and on 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 via the groove portions 50A and 50B, respectively. The groove portions 50A and 50B are each formed in a ring shape in the circumferential direction. In addition, the groove portions 50A and 50B are formed in a molding process step 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. 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, the groove portions 50A and 50B are connected to the front surface 11 and the outer peripheral surface 12 of the chuck body 10. Therefore, at the boundary between the front surface 11 of the chuck body 10 and the groove portion 50A and the outer peripheral surface 12 of the chuck body 10 and The boundaries of the groove portions 50B each show a boundary line.

FIG. 7 is an enlarged view showing the offset of the boundary line between the chuck main body front surface 11 and the groove portion 50A when the finish machining is offset in the same manner as shown in FIG. 3 in this embodiment. This example illustrates a case where a slight finishing offset D occurs on the finishing surfaces 11, 11 'on the front surface of the chuck body due to a slight eccentricity when the chuck body is reinstalled.

As shown in FIG. 7, even if the finishing offset D is generated, the boundary lines P and Q between the front surface 11 of the chuck body and the groove portion 50A are only slightly offset L2. Specifically, the amount of displacement from the boundary line P to the boundary line Q is divided into an offset in a direction orthogonal to the front surface 11 and an offset in the front radial direction (corresponding to the offset L2). By comparing FIG. 3 showing a conventional structure with FIG. 7 showing a structure of the embodiment, it can be seen that in the embodiment, the front radial deviation (corresponding to the offset L2) is suppressed. This effect is obtained because the connection portion between the finished surface of the chuck body front surface 11 and the groove portion 50A is sharp. In other words, it is because the angle formed by the finished surface of the chuck body front surface 11 and the tangent line (the line connecting P and Q) of the groove portion 50A near the boundary line becomes large.

In addition, as shown in FIG. 7, a boundary line R is also displayed on the chamfered portion 40 and the groove portion 50A, and the position of this boundary line R is preferably located below the surface S corresponding to the maximum deviation during finishing (finishing). Direction side). As a result, the boundary line R can be prevented from being shifted because no finishing is performed.

Similarly, even if the finishing offset D occurs, the boundary line between the outer peripheral surface 12 of the chuck body and the groove portion 50B is only slightly offset. In addition, even if the finishing shift occurs due to a slight tilt when the chuck body is reinstalled, the boundary line between the outer peripheral surface 12 of the chuck body and the groove portion 50B is only slightly shifted.

According to this embodiment, a curved chamfered portion 40 is provided at a boundary portion between the peripheral portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10, and the chamfered portion 40 is provided on the chuck body at the chamfered portion 40. The front surface 11 side of 10 and the outer peripheral surface 12 side of the chuck body 10 are respectively provided with annular groove portions 50A and 50B in the circumferential direction, so that even when the front surface 11 and the outer peripheral surface 12 of the chuck body 10 are finished, even if finishing is performed The shift can also suppress a large shift in the boundary lines between the front surface 11 and the outer peripheral surface 12 of the chuck body 10 and the groove portions 50A and 50B. Therefore, it is possible to suppress a problem that the boundary line is eccentric with respect to the center of the chuck main body 10 in a front view or inclined with respect to the axial direction of the chuck main body 10 in a side view, so that a problem in appearance is apparent. As a result, it is possible to provide a chuck mechanism 1 including a chuck body 10 having a chamfered portion having a safe and excellent appearance.

In addition, in this embodiment, the shape of the groove portions 50A and 50B is not particularly limited, and as shown in FIG. 7, it is preferable that the groove portions 50A and 50B have an arc shape or a V shape when viewed in cross section. As a result, sharp corners are not formed in the boundary portion between the groove portion 50A and the front surface 11 and the boundary portion between the groove portion 50B and the outer peripheral surface 12. In addition, the chips are less likely to adhere. It is also more beautiful in appearance.

In addition, "arc-shaped" also includes "elliptic-arc", and "V-shaped" includes the case where the boundary part of the groove part 50A and the front surface 11 and the boundary part of the groove part 50B and the outer peripheral surface 12 become R shape.

FIG. 8 is a perspective view schematically showing the configuration of a 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 main jaws 20 provided movably on a front surface 11 of the chuck body 10, and detachably mounted on the chuck body 20. Top jaws 30 on the front of each main jaw 20.

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

FIG. 9 is a front view of the chuck mechanism 1 shown in FIG. 8 when viewed from the top claw 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 portion 50A can be seen at the periphery of the front surface 11 of the chuck body 10. The boundary line will not be greatly shifted due to different positions. Therefore, the boundary line is not eccentric with respect to the center of the chuck body 10 and is apparent in appearance.

FIG. 10 is a partial side view of the chuck mechanism 1 shown in FIG. 8.

As shown in FIG. 10, when the external appearance of the chuck mechanism 1 is viewed from the side, an annular groove portion 50B can be seen at the end of the outer peripheral surface 12 of the chuck body 10, but the outer peripheral surface 12 and the groove portion 50B of the chuck body 10 The boundary line of will not be greatly shifted due to different positions. Therefore, this boundary line does not incline with respect to the axial direction of the chuck body 10 and is apparent in appearance.

It should be noted that, in the present embodiment, the peripheral portion of the back surface 14 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10 are also provided with a curved chamfered portion 40 at the boundary portion. Ring-shaped groove portions 50A and 50B are provided on the back surface 14 side of the chuck body 10 and the outer peripheral surface 12 side of the chuck body 10 in the circumferential direction, respectively. The chamfered portion 40 on the back surface 14 side of the chuck body 10 corresponds to a second chamfered portion. The groove portion 50A on the back surface 14 side of the chuck body 10 corresponds to a third groove portion, and the groove portion 50B on the back surface 14 side of the chuck body 10 corresponds to a fourth groove portion. In addition, since the back surface 14 of the chuck body 10 is rarely seen when observing the external appearance, the groove portion 50A may not be provided.

According to the present embodiment, a curved portion 40 is provided on the peripheral portion of the front surface 11 (and further on the rear surface 14) of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10 at the boundary between the chuck body 10 and the chamfered portion. 40 The annular chuck portions 50A and 50B are provided on the front surface 11 (and further on the back surface 14) side of the chuck body 10 and the outer peripheral surface 12 side of the chuck body in the circumferential direction, respectively. Chuck mechanism 1 of the chuck body 10 at the corner.

The chuck mechanism 1 in this embodiment can be manufactured by the following method.

First, a chamfered portion 40 having a curved shape is formed at a boundary portion between the peripheral portion of the front surface 11 of the chuck body 10 and the outer peripheral surface 12 of the chuck body 10. In addition, formation of the chamfered part 40 is performed in the shaping | molding process which performs the shaping | molding process (roughing which leaves a finishing allowance) of the front surface 11 and the outer peripheral surface 12 of the chuck main body 10.

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

In this embodiment, as shown in FIG. 6, in the molding process step, the two end portions 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 formed in the circumferential direction. The annular groove portions 50A and 50B.

In addition, it is preferable that the groove portions 50A and 50B are formed in an arc shape or a V shape when viewed in cross section. Here, the “circular arc shape” includes an “elliptical arc shape”, and the “V-shape” includes a case where the boundary portion between the groove portion 50A and the front surface 11 and the groove portion 50B and the outer peripheral surface 12 is formed in an R shape.

As mentioned above, although this invention was demonstrated using the preferable embodiment, these explanations are not a limitation, and of course, various changes are possible. For example, in the above embodiment, the chamfered portion 40 may be formed in a curved shape, and the specific shape is not particularly limited. For example, the cross-sectional view may be circular or elliptical.

In addition, in the present embodiment, the forming process includes a turning process, a machining process, a pressing process, a three-dimensional shaping, a mold forming, and the like. In addition, finishing includes high-precision cutting, grinding, and grinding.

In addition, the dimensions shown in the above drawings are for convenience of explanation, and the dimensions are not changed to indicate actual dimensions.

In this embodiment, two groove portions 50A (first groove portion) and 50B (second groove portion) are formed in the chamfered portion 40 (first chamfered portion) on the front surface 11 side of the chuck body 10. The case of the person has been described, but it is not limited to this. The chamfered portion 40 (first chamfered portion) on the front surface 11 side of the chuck body 10 may be formed with a groove portion 50A (first groove portion). Also in this case, effects corresponding to the effects achieved in the embodiment can be obtained.

Claims (7)

    A chuck mechanism includes a chuck body having a front surface, a first chamfered portion, an outer peripheral surface, and a groove portion. The front surface is provided with a clamping jaw for gripping a workpiece, and the first chamfer. The portion is formed in a curved shape, and the first chamfered portion is formed between a peripheral portion of the front surface and the outer peripheral surface, the groove portion has a first groove portion, and the first groove portion is formed in the first groove portion. The front side of the first chamfered portion, and the first groove portion extends in a ring shape along a circumferential direction of the chuck body.         The chuck mechanism according to claim 1, wherein the groove portion has a second groove portion, the second groove portion is formed on the outer peripheral surface side of the first chamfered portion, and the second The groove portion extends in the circumferential direction to form a ring shape.         The chuck mechanism according to claim 2, wherein the first chamfered portion and the groove portion are formed by a molded processed surface of the chuck body, and the front surface and the outer peripheral surface are formed by a finished surface. .         The chuck mechanism according to claim 1 or 2, wherein the chuck body has a back surface and a second chamfered portion, the back surface is formed on the chuck body on an opposite side of the front surface, and the first 2 The chamfered portion is formed in a curved shape and is formed between a peripheral portion of the back surface and the outer peripheral surface, the groove portion has a third groove portion and a fourth groove portion, and the third groove portion is formed in The back side of the second chamfered portion extends in 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 periphery. Extend to form a loop.         The chuck mechanism according to claim 1 or 2, wherein the groove portion has a circular arc shape or a V shape when viewed in cross section.         A method for manufacturing a chuck mechanism. The chuck mechanism is provided with a clamping jaw for grasping a workpiece on the front surface of the chuck body. The manufacturing method includes the following steps: a molding process step: A portion between the peripheral portion of the front surface and the outer peripheral surface of the chuck body is subjected to a molding process to form a curved-shaped chamfered portion at the portion; and a finishing step: the front surface and the The outer peripheral surface is finished, and the forming step includes a step of forming a groove portion in the formed chamfered portion. In the step of forming the groove portion, the groove portion is formed in the chamfered portion. The front side is formed in a ring shape extending in the circumferential direction of the chuck body.         The method for manufacturing a chuck mechanism according to claim 6, wherein the groove portion is formed in an arc shape or a V shape in a cross-sectional view.