JP2009000781A - Apparatus for positioning chuck of component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for positioning a chuck of a component, which individually positions chuck jaws so as to accurately chuck the component. <P>SOLUTION: The workpiece W is chucked as follows. The first chuck jaw 11 is moved in X-axis direction by means of a first driving source 14. The second and third chuck jaws 12, 13 are rotatably supported by a first link 18 fixed to the linear motion spindle 15a in a second driving source 15 and second links 20a, 20b attached to the neighborhood of both end portions of the first link 18, and are moved toward the center of the workpiece W along the X1 axis and the X2 axis making ±60° to the X axis respectively. The first, second, and third chuck jaws come into contact with the workpiece W via contact portions 11a to 13a. The movable ranges of the second and third chuck jaws 12, 13 are adjusted by means of adjusting means 21a, 21b, and first stoppers 22a, 22b for positioning are provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a component chuck positioning apparatus capable of adjusting the positioning of a chuck claw so as to chuck a work to be chucked with high accuracy.

  Conventionally, a chuck in a machine tool has supported a workpiece at three points, transported it to a machining position, and performed various types of processing with a tool. However, the position of the chuck with respect to the workpiece is important for achieving machining accuracy. If the workpiece is gripped at a position where the chuck is displaced, the desired machining is hindered.

For example, in Patent Document 1, a workpiece having a square cross section other than a circular pipe or rod is also set to an accurate gripping position, and is configured based on the following viewpoint.
The inscribed circle connecting the chuck claws is concentric with the inscribed circle on the side surface of the workpiece when the workpiece is gripped. In other words, the claw hits the side surface at a right angle, and the gripping direction faces the workpiece axis (the center point of the inscribed circle). Therefore, even if the work is slightly rotated around the axis, as the claw is reduced in diameter, the claw hits at right angles on all sides, and as a result, the work rotates to the correct posture. And the expansion / contraction center of the nail coincide.

Therefore, in Patent Document 1, a workpiece that is gripped by a claw of a chuck that expands and contracts in the radial direction and is engaged with a workpiece to be mated with the side surface of the workpiece that is gripped by the claw is defined as an axis of the workpiece. It is characterized by a regular polygon having the same surface as the number of the claws when it is cut along a perpendicular surface.
As a result, when the chuck claw that expands and contracts in the radial direction grips the side surface of the workpiece, the side surface (side surface when viewed by cutting along the plane orthogonal to the axis) is a regular polygon. Even if it is slightly rotated around the axis, it can be held in a correct posture.

JP 2005-324289 A

  On the other hand, in the chuck device 1 shown in FIG. 4, a first chuck claw 3 is provided on the first drive source 2 so as to be linearly movable, and the second drive source 4 is arranged so as to face the first chuck claw 3. The second drive source 4 is provided with two dog-shaped links 5 and 5 so as to be rotatable on the operation shaft 4a of the second drive source 4. The second and third chuck claws 6 and 7 are attached to the distal ends of these wedge-shaped links 5 and 5.

However, in the above-described chuck device 1, there is no problem if the tips of the second and third chuck claws 6 and 7 are not worn, but the tips of the second and third chuck claws 6 and 7 (parts and parts) When the contact surface is worn, there is a problem in that the centers of the parts to be chucked are shifted due to the wear amount of the second and third chuck claws 6 and 7 being different.
In this case, since the second and third chuck claws 6 and 7 are fixed to the dog-shaped links 5 and 5, they cannot be adjusted even if they are individually adjusted.
The present invention has been proposed in order to improve such a problem, and is a component chuck positioning device which can be individually adjusted so that a chuck claw can always be gripped at an accurate position with respect to a workpiece. The purpose is to provide.

  In order to solve the above-mentioned problem, in the invention according to claim 1, the first, second, and third chuck claws (11, 11) arranged at predetermined angles with respect to the center of the workpiece (W) to be chucked. 12, 13) has a mechanism configuration in which the workpiece (W) is centrally driven to chuck the workpiece (W) with the center of the workpiece (W) as a target, and any two of the first to third chuck claws (11 to 13) And a motion support mechanism (16) for individually adjusting the operation range and restricting both of the chuck claws.

  Accordingly, even when the contact portion of the first to third chuck claws (11 to 13) with the workpiece (W) to be chucked cannot be contacted with the workpiece (W) due to wear or the like, the operation positioning is performed. The mechanism (17) individually adjusts the operating range of both chuck claws and regulates them so that both chuck claws are caused to follow by the swing support mechanism (16), and thereby the first to third chuck claws. (11-13) can be normally brought into contact with the workpiece (W) to chuck the workpiece (W).

  In the invention according to claim 2, the mechanism configuration in which the first to third chuck claws (11 to 13) are driven in a concentrated manner to chuck the workpiece (W) at the center is the first chuck claw (11). The first drive source (14) targets the center of the workpiece (W) along the first axis, while the second and third chuck claws (12, 13) are directly connected to the second drive source (15). Along the second and third axes, which are supported on the dynamic shaft (15a) via the swing support mechanism (16) and directed in directions opposite to each other at an equal angle to the first axis, The workpiece (W) is chucked with the workpiece (W) center as a target.

  As a result, the first chuck claw (11) is operated with the first drive source (14) as the target about the center of the workpiece (W) along the first axis to be brought into contact with the workpiece (W), while the second, The third chuck pawls (12, 13) are directed by the second drive source (15) in directions opposite to each other at an equal angle with respect to the first shaft via the linear motion shaft (15a). 2. The workpiece (W) center can be moved along the third axis with the swing support mechanism (16) flexibly and brought into contact with the workpiece (W) to securely chuck the workpiece (W). it can.

  In the invention according to claim 3, the swing support mechanism (16) includes the first link (18) swingably connected to the linear motion shaft (15a) in the second drive source (15), and the first link (18). In the vicinity of both ends of the first link (18), a second link (20a, 20b) having one end side movably / displaceable via a long hole (19h, 19h) is provided.

  Thereby, according to the operation of the second and third chuck claws (12, 13) connected to the other end side of the second link (20a, 20b), one end side of the second link (20a, 20b) is the first side. By swinging the long holes (19h, 19h) in the vicinity of both ends of the link (18) and displacing the first link (18), the swing support mechanism (16) can be caused to follow.

  In the invention according to claim 4, the movement positioning mechanism (17) includes the adjusting means (21a, 21b) provided on the second and third chuck claws (12, 13) and the adjusting means (21a, 21b). ), The first stopper (22a, 22b) that restricts the movement of the second and third chuck claws (12, 13) is provided.

  After adjusting the operating range of the second and third chuck claws (12, 13) by the adjusting means (21a, 21b), the adjusting means (21a, 21b) comes into contact with the first stopper (22a, 22b). Thus, the operation range can be individually adjusted and regulated, and the second and third chuck claws (12, 13) can reliably come into contact with the workpiece (W) for chucking.

  Furthermore, the invention according to claim 5 is characterized in that second stoppers (23a, 23b) that abut against the first link (18) when the second drive source (15) is retracted are provided.

  Thereby, both the second and third chuck claws (12, 13) can be reliably retracted.

  In addition, the code | symbol in the parenthesis attached | subjected to each component described in each said component is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

FIG. 1 schematically shows a component chuck positioning apparatus 10 according to the present invention.
This component chuck positioning device 10 includes first, second, and third chuck claws 11, 12, and 13 arranged at predetermined angles (120 °) with respect to the center of the workpiece W to be chucked. The mechanism configuration is such that the workpiece W is driven in a concentrated manner to chuck the workpiece W.

Of the first to third chuck claws 11 to 13, the first chuck claw 11 operates a linear motion mechanism (not shown) by the first drive source 14 in the first axis, that is, in the X-axis direction. I am trying to move forward and backward.
Further, a contact portion 11 a that comes into contact with the workpiece W in a state of being directed toward the center of the workpiece W is provided at the tip of the first chuck claw 11.

On the other hand, the second and third chuck claws 12 and 13 are supported on a linear motion shaft 15 a that linearly moves by a second drive source 15 via a swing support mechanism 16 so as to be swingable. Further, contact portions 12 a and 13 a that contact the workpiece W in a state of being directed toward the center of the workpiece W are provided at the tips of the second and third chuck claws 12 and 13.
Further, the second and third chuck claws 12 and 13 are provided with an operation positioning mechanism 17 that individually adjusts and regulates the operation ranges of the second and third chuck claws 12 and 13.

A swing support mechanism 16 that swingably supports the second and third chuck claws 12 and 13 includes a first link 18 that is swingably attached to the linear motion shaft 15a of the second drive source 15 in the center. In the vicinity of both ends of the first link 18, there are provided second links 20a and 20b which are attached to the one end side so as to be freely movable / displaced through elongated holes 19h and 19h. These second links 20a and 20b are of a dogleg shape, and are attached so that the central axis is rotatable about the X axis as a symmetric axis, one end side and the central axis, and the other end side and the center. Each of the link lengths with the shaft has the same dimensions and is substantially orthogonal.
As described above, the second and third chuck claws 12 and 13 are oriented in directions opposite to each other at an equal angle (60 °) with respect to the X axis, that is, the X1 axis and the X2 axis. Are moved with the center of the workpiece W as a target, and are brought into contact with the workpiece W to chuck the workpiece W.

The motion positioning mechanism 17 provided on the second and third chuck claws 12 and 13 is configured as follows.
That is, the operation positioning mechanism 17 adjusts the adjusting means 21a and 21b mounted on the second and third chuck claws 12 and 13, respectively, and the adjusting means 21a and 21b, thereby adjusting the second and third chuck claws 12, 13 comprises first stoppers 22a and 22b for positioning by restricting the operation range.
The adjusting means 21a and 21b are adjusting screws 21a and 21b, which are supported so as to be able to advance and retract in parallel with the X1 axis and the X2 axis, respectively.

  Furthermore, in the component chuck positioning device 10 having the above-described configuration, the second stopper 23a that restricts the operating position of the first link 18 that is swingably attached by the second drive source 15 via the linear motion shaft 15a. , 23b.

The component chuck positioning device 10 according to the present invention is configured as described above, and the operation thereof will be described next.
First, in order to grip the workpiece W, the first, second, and third chuck claws 11, 12, and 13 arranged at predetermined angles (120 °) with respect to the center of the workpiece W to be chucked are respectively The first drive source 14 and the second drive source 15 are activated and moved close to each other with the workpiece W center O as a target.
At this time, the first chuck claw 11 moves along the X axis with the workpiece W center O as a target.
The second and third chuck claws 12 and 13 are moved by the second drive source 15 via the linear motion shaft 15a to move the first link 18 along the X axis with the workpiece W center O as a target. One end side of 20a, 20b is displaced toward both ends of the first link 18 through the long holes 19h, 19h in the vicinity of both ends of the first link 18, and the other end side of the second links 20a, 20b is moved. The second and third chuck claws 12 and 13 can be moved close to each other along the X1 axis and the X2 axis directed in the direction of 60 ° with respect to the X axis with the workpiece W center O as a target.

  In this way, the first to third chuck claws 11 to 13 are moved along the X axis, the X1 axis, and the X2 axis with the workpiece W center O as a target, thereby moving the first to third chuck claws 11 to 13. Can chuck the workpiece W by contacting the workpiece W via the contact portions 11a to 13a at the leading ends, respectively (see FIG. 2). At this time, the adjusting screws 21a and 21b, which are adjusting means near the second and third chuck claws 12 and 13, abut on the first stoppers 22a and 22b, respectively.

Here, when the contact portions 11a to 13a at the tips of the first to third chuck claws 11 to 13 repeatedly contact and chuck the workpiece W, and the machining process is repeatedly performed, partial wear proceeds.
As the wear progresses, the worn portion cannot sufficiently contact the workpiece W, and the workpiece W cannot be stably chucked.

Therefore, the adjustment screws 21a and 21b near the second and third chuck claws 12 and 13 are adjusted and moved so that the wear point at the contact point can sufficiently contact the workpiece W.
For example, when the contact portion 12a at the tip of the second chuck claw 12 is worn out, it is necessary to move the second chuck claw 12 further as compared with the normal time without wear. The adjusting screw 21a near the chuck pawl 12 is adjusted in a direction away from the first stopper 22a.

In this state, the second drive source 15 moves the first link 18 along the X axis with the workpiece W center O as a target via the linear motion shaft 15a. Initially, the third chuck claw 13 that is not worn stops at that position because the side adjusting screw 21b hits the first stopper 22b.
However, in the worn second chuck claw 12, the first link 18 is tilted and displaced to the second link 20a side with respect to the linear motion shaft 15a in the second drive source 15, and the second link 20a on the displaced side of the second link claw 12 is displaced. The one end side moves through the long hole 19h in the first link 18 and the second link 20a is further displaced, so that the second chuck claw 12 in which the wear portion has occurred is until the adjusting screw 21a contacts the first stopper 22a. Can be moved (see FIG. 3).
In this way, the worn contact portion can be reliably brought into contact with the workpiece W, and the workpiece W can be stably chucked.

  As described above, in the component chuck positioning apparatus 10 according to the present invention, even if the contact portion with the workpiece W may be worn by the process of repeatedly chucking the workpiece W and performing the processing, Since the power of the chuck can be chucked by finely adjusting the operating range of the chuck claw through the first link and the second link and securely contacting the workpiece W, the chuck of the workpiece W can be prevented from being displaced. Is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a main part showing an embodiment of a component chuck positioning device according to the present invention. FIG. 2 is a schematic explanatory diagram of a main part configuration illustrating a state in which a workpiece chuck is held by operating the component chuck positioning device illustrated in FIG. 1. It is a typical principal part structure explanatory view for explaining the operation function of the parts chuck positioning device concerning the present invention. It is typical structure part explanatory drawing which shows an example of the conventional component chuck positioning apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Parts chuck positioning device 11 1st chuck nail 11a Contact part 12 2nd chuck nail 12a contact part 13 3rd chuck nail 13a contact part 14 1st drive source 15 2nd drive source 15a Linear motion shaft 16 Oscillation support mechanism 17 Operation Positioning mechanism 18 First link 19h Slot 20a, 20b Second link 21a, 21b Adjustment screw 22a, 22b First stopper 23a, 23b Second stopper W Workpiece

Claims (5)

The first, second, and third chuck claws (11, 12, 13) disposed at predetermined angles with respect to the center of the workpiece (W) to be chucked, and the workpiece (W) with the center of the workpiece (W) as a target. ) With a centralized drive mechanism for chucking,
A swing support mechanism (16) for swingably supporting any two chuck claws among the first to third chuck claws (11-13);
An operation positioning mechanism (17) that individually adjusts and regulates the operation range of both of these chuck claws;
A component chuck positioning device comprising: The mechanism configuration in which the first to third chuck claws (11 to 13) are driven in a concentrated manner to chuck the workpiece (W) as a target is that the first chuck claws (11) are moved to the first drive source (14). ) To target the center of the workpiece (W) along the first axis,
The second and third chuck claws (12, 13) are supported on the linear motion shaft (15a) of the second drive source (15) via the swing support mechanism (16), and the first The workpiece (W) is chucked with the center of the workpiece (W) as a target along the second and third axes that are oriented in directions opposite to each other at an equal angle with respect to the shaft. 2. The component chuck positioning device according to claim 1, wherein The swing support mechanism (16) includes a first link (18) that is swingably connected to a linear motion shaft (15a) in the second drive source (15);
In the vicinity of both ends of the first link (18), there is provided a second link (20a, 20b) attached to one end side so as to be freely movable / displaceable through a long hole (19h, 19h). The component chuck positioning device according to claim 1 or 2. The movement positioning mechanism (17) includes adjusting means (21a, 21b) provided on the second and third chuck claws (12, 13), respectively.
A first stopper (22a, 22b) for restricting the movement of the second and third chuck claws (12, 13) by the contact of the adjusting means (21a, 21b);
The component chuck positioning device according to claim 1, further comprising:   The component chuck positioning according to claim 2 or 3, further comprising a second stopper (23a, 23b) that contacts the first link (18) when the second drive source (15) is retracted. apparatus.

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