JP4819511B2 - Clamping device - Google Patents

Description

  The present invention relates to a caulking device.

  2. Description of the Related Art Conventionally, there is a caulking device that fixes a workpiece installed on a work table with a clamping device and caulks two parts in the workpiece with a caulking tool. As a workpiece, for example, there is a side gear device described in Patent Document 1, and a nut for holding an inner race of a ball bearing is screwed onto a shaft body of a cross gear (or counter gear), and an end of the nut is connected to the shaft body. There is something that is caulked on the outer periphery.

In a conventional crimping device, a pneumatically operated tool such as an air hammer is used as a crimping tool, and the air supply flow meter of this pneumatically operated crimping tool requires air to complete the crimping operation. When the amount is detected, it is considered that the caulking work has been completed. When the completion of the caulking operation is considered, the clamping device is unclamped from the workpiece, and the operator can carry the workpiece from the work table to the next process.
JP-A-9-89086

  In the prior art, the completion of the caulking work is regarded only by detecting the air consumption of the pneumatically operated caulking tool, and the caulking work can be performed even when the operator inadvertently runs the caulking tool idle. There is a risk of misjudgment regarding completion. Based on this misjudgment, the clamping device is unclamped from the work, and there is a possibility that an operator may inadvertently make a mistake of taking the work from the work table and carrying it out to the next process.

  An object of the present invention is to determine with high accuracy the completion of caulking work of two parts.

The invention according to claim 1 is a caulking device in which a work set on a workbench is fixed with a clamping device, and two parts in the work are caulked together with a caulking tool. Provided that a pneumatically operated crimping tool is used, the air supply flow meter of this pneumatically operated crimping tool detects a constant flow rate, and the vibration detector detects a constant vibration. The completion of the caulking work is determined.

According to a second aspect of the present invention, in the first aspect of the present invention, the clamp device is configured to be unclamped from the work upon receiving a result of completion of the caulking operation .

(Claim 1)
(a) When the caulking tool actually caulks two parts, pay attention to the fact that the constant vibration of the caulking tool is transmitted to the workbench. However, the fact that this constant vibration was detected was regarded as one of the conditions for determining the completion of the caulking operation.

(b) In addition to the fact that the vibration detector has detected constant vibration, the fact that the air consumption of the pneumatically operated caulking tool has reached a constant flow rate is also determined as a criterion for completion of caulking work. Completion of caulking work can be determined with higher accuracy.

(Claim 2 )
(c) The clamping device is unclamped from the workpiece in response to the result of determining the completion of the caulking work. Therefore, when the caulking operation is insufficient or incomplete, the clamping device continues to fix the workpiece, and an operator can prevent an inadvertent mistake of taking the unclamped workpiece from the work table and carrying it out to the next process. .

  FIG. 1 is a schematic view showing a work table of a caulking device, FIG. 2 is a cross-sectional view showing a workpiece, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. FIG. 5 is a flowchart showing a caulking operation sequence of the caulking device.

  As shown in FIG. 1, the crimping device 10 fixes a workpiece 100 placed on a work table 11 with a clamping device 20, and includes two components in the workpiece 100 (for example, a shaft main body 112 of a cross gear 111 to be described later) Then, the nut 115) for holding the inner race 113A of the ball bearing 113 is crimped together with the crimping tool 10A.

  As shown in FIG. 2, the workpiece 100 includes a shaft body 112 of a cross gear 111 constituting a side gear device that is rotatably incorporated in a gear housing 114 via a ball bearing 113, and is screwed into the shaft body 112 by a nut runner. The inner race 113A of the ball bearing 113 is held on the shaft body 112 by the nut 115 to be attached, and the outer race 113B of the ball bearing 113 is held on the gear housing 114 by the nut 116 screwed to the gear housing 114 by the nut runner.

  The caulking device 10 uses the caulking tool 10A to (1) tighten the shaft main body 112 of the cross gear 111 and the nut 115 for holding the inner race 113A of the ball bearing 113 on the shaft main body 112, and (2) The gear housing 114 and the nut 116 for holding the outer race 113B of the ball bearing 113 to the gear housing 114 are crimped. The nut 115 is obtained by pressing and caulking a portion of the thin annular portion 115A integrated with the nut body into a recess 112A that is recessed in a portion of the outer periphery of the shaft body 112 by the caulking tool 10A. (FIG. 3). The nut 116 pushes and adds a part in the circumferential direction of the thin annular portion 116A integrated with the nut body into a recess 114A formed in a part of the inner periphery of the gear housing 114 by the caulking tool 10A. Tightened. As the caulking tool 10A, a pneumatically operated air hammer or the like that applies high-frequency vibration to the caulking target part can be used.

  However, the caulking device 10 has the following configuration in order to determine completion of caulking work of two parts (the shaft main body 112 and the nut 115 or the gear housing 114 and the nut 116).

  The crimping device 10 has a clamp device 20 on a work table 11. The clamp device 20 advances the clamp arm 22 from the standby position by the air cylinder 21 driven by the start switch 20A, and the upper surface of the outer peripheral flange 114B of the gear housing 114 is pushed by the downward pressing surface 22A of the clamp arm 22 advanced from the standby position. While sandwiched between the work table 11 and the lateral holding surface 22B of the clamp arm 22 abuts against the outer peripheral surface of the outer peripheral flange 114B of the gear housing 114, the gear housing 114 is prevented from rotating.

  The crimping device 10 is provided with a vibration detector 30 on the work table 11. The vibration detector 30 detects an acceleration (amplitude) of high-frequency vibration applied to the two parts (the shaft main body 112 and the nut 115 or the gear housing 114 and the nut 116) by the caulking tool 10A. The vibration imparted to the thin annular portion 115A of the nut 115 by the caulking tool 10A is transmitted to the work table 11 through the recess 112A, the ball bearing 113, and the gear housing 114 of the shaft main body 112, and is provided on the work table 11. The vibration detector 30 is detected. Further, the vibration applied to the thin annular portion 116 </ b> A of the nut 116 by the caulking tool 10 </ b> A is transmitted to the work table 11 through the recess 114 </ b> A of the gear housing 114 and detected by the vibration detector 30 provided on the work table 11. Is done. A detection signal from the vibration detector 30 is transmitted to the controller 50. The controller 50 uses the caulking tool 10A on condition that the vibration detector 30 detects a certain vibration (acceleration greater than a certain value) (vibration required for the caulking tool 10A to complete the caulking work). Completion of the caulking operation of the two parts can be determined.

The caulking device 10 can be provided with an air supply flow meter 40 in an air pressure supply system for operating the air pressure actuated caulking tool 10A. In the controller 50, the air supply flow meter 40 detects a constant flow rate (a flow rate required for the caulking tool 10A to complete the caulking operation), and the vibration detector 30 vibrates a constant vibration as described above. on condition that the detected, assumed to determine the completion of the caulking work of the two components by caulking tool 10A.

  As shown in FIG. 4, when the controller 50 determines the completion of the caulking work by the caulking tool 10A based on the detection results of the vibration detector 30 and the air supply flow meter 40, the caulking work completion display lamp is turned on. Etc. may be used. When the controller 50 of this embodiment determines that the caulking work by the caulking tool 10 </ b> A is completed, the controller 50 transmits an unclamping command to the clamping device 20, and the air cylinder 21 moves the clamp arm 22 from the outer peripheral flange 114 </ b> B of the gear housing 114. Retract and unclamp.

The crimping device 10 operates as follows (FIG. 5).
(1) After fitting the outer periphery below the outer peripheral flange 114B of the gear housing 114 of the workpiece 100 into the positioning hole 11A of the work table 11, the start switch 20A is turned on. Thereby, the clamp arm 22 of the clamp device 20 fixes the workpiece 100 on the work table 11.

  (2) Drive the nutrunner. The nut runner is lowered from the rising end and rotated to fasten the nut 115 to the shaft body 112, the inner race 113A of the ball bearing 113 is held on the shaft body 112, and the nut runner is raised.

  (3) When the nut runner returns to the rising end, the pneumatic pressure supply to the caulking tool 10A is turned on, and the thin annular portion 115A of the nut 115 is caulked to the recess 112A of the shaft main body 112 by the caulking tool 10A.

  The fastening of the nut 116 to the gear housing 114 and the caulking work of the thin annular portion 116A of the nut 116 and the recess 114A of the gear housing 114 are performed in the same manner as in the above (2) and (3).

  (4) The detection results of the vibration detector 30 and the air supply flow meter 40 are transmitted to the controller 50. When the controller 50 determines the completion of the caulking work by the caulking tool 10A, an unclamping command is transmitted from the controller 50 to the clamping device 20, and the operator takes out the unclamped work 100 from the workbench 11 and caulks. The situation can be confirmed visually.

According to this embodiment, there are the following actions.
(a) When the caulking tool 10A actually caulks two parts (the shaft main body 112 and the nut 115 or the gear housing 114 and the nut 116), a certain vibration of the caulking tool 10A is transmitted to the work table 11. Focusing on the fact that the vibration detector 30 is provided on the workbench 11, the fact that the vibration detector 30 detects this constant vibration is one of the conditions for determining the completion of the caulking operation.

  (b) In addition to the fact that the vibration detector 30 has detected a certain vibration, the fact that the air consumption of the pneumatically operated caulking tool 10A has reached a certain flow rate is also used as a judgment condition for the completion of the caulking work. Thus, the completion of the caulking work can be determined with higher accuracy.

  (c) The clamping device 20 is unclamped from the workpiece 100 in response to the result of completion of the crimping operation. Therefore, when the crimping operation is insufficient or incomplete, the clamping device 20 continues to fix the workpiece 100, and the operator inadvertently takes out the unclamped workpiece 100 from the work table 11 and carries it out to the next process. You can prevent mistakes.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, the present invention can be applied to a work caulking device other than a side gear device.

FIG. 1 is a schematic view showing a work table and the like of the caulking device. FIG. 2 is a sectional view showing the workpiece. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a block diagram showing a control system of the caulking device. FIG. 5 is a flowchart showing a caulking operation sequence of the caulking device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Clamping apparatus 10A Clamping tool 11 Work table 20 Clamping apparatus 30 Vibration detector 40 Air supply flowmeter 50 Controller 100 Workpiece

Claims (2)

In a caulking device that fixes a work installed on a workbench with a clamping device and caulks two parts in the work with a caulking tool,
A vibration detector is provided on the workbench, and a pneumatically operated tool is used as the caulking tool. The air supply flow meter of this pneumatically operated caulking tool detects a constant flow rate, and the vibration detector is constant. A caulking device that determines completion of caulking work on the condition that vibration is detected. The caulking device according to claim 1 , wherein the clamping device is unclamped from a workpiece upon receiving a result of completion of caulking work.

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