JP3424668B2 - Material testing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material testing machine for performing a tensile test on a soft and foil-like test piece such as a film. 2. Description of the Related Art Conventionally, when a tensile test is performed by a material testing machine, a test piece 3 is gripped by both chucks as shown in FIG. That is, 1 is an upper chuck for holding the test piece, 2 is a lower chuck, and the test piece is normally held by these upper and lower chucks. When the upper chuck 1 is relatively displaced upward and loaded, the test piece 3 breaks into an upper test piece 3U and a lower test piece 3D as shown in FIG. 6B. By the way, in this type of tensile test, when a large number of test pieces are continuously tested, the test work is mounted between the chucks 1 and 2 and the test is performed between the chucks 1 and 2 in order to improve test operation efficiency. The collection is mechanized, and is automatically performed by, for example, a robot hand. FIG. 7 shows an example, and reference numeral 15 denotes test piece 3
Is a robot hand for mounting and collecting, and 16 is a gripper for gripping the robot hand 15 and 17 is a claw for similarly gripping a test piece. The robot hand 15 for collection is attached to the tip of the turning shaft 7 and is driven by the turning drive 6. That is, the recovery after the test will be described. When the test is completed and the state shown in FIG. 6B is reached, the rotating shaft 7 is driven to rotate, and the gripping chuck 16 moves the test pieces 3U, 3U.
D. In this state, the claw 1 of the gripper 16 is held.
7, the upper test piece 3U or the lower test piece 3D is removed from the upper chuck 1 or the lower chuck 2. Next, in order to collect the test piece, the collection robot hand 15 is turned by the turning drive unit 6 to be retracted and moved to a predetermined position for collection, and then the claw 17 is opened and the test piece 3U,
It is designed to collect 3D. As described above, in the conventional testing machine, the test piece after the test is collected by operating the collection robot hand 15 and the gripping chuck 16 attached to the tip end thereof. Although the detailed mechanism is not shown in the drawing, the turning drive unit 6 can be moved up and down in accordance with the removal position when the upper test piece 3U is collected and when the lower test piece 3D is collected. [0005] In the case where the test piece is a hard material such as a metal, that is, a stiff material, the test pieces 3U and 3D after the completion of the tensile test as shown in FIG. The shape of the upper and lower sides is kept close to the original shape, and the position is fixed, so that it can be easily gripped by the collection robot hand 15, and the test piece is easily transferred from the upper chuck 1 or the lower chuck 2 to the gripping chuck 16. , And can be easily recovered. However, when the test piece is a soft material such as a film, that is, a material having no rigidity, when a tensile test is performed as shown in FIG. 5A, the test piece 4 after the completion is shown in FIG. 5B. Thus, the shape of the lower test piece 4D that has been broken cannot maintain its original shape. For this reason, in the conventional collecting robot hand method, not only the position of the lower test piece 4D is not determined, but also the gripping chuck 16 cannot easily grip the test piece 4D due to its shape. A method of recognizing the position or the shape of the test piece by image processing technology and operating the collection robot hand 15 with the image signal is also conceivable, but the mechanism as the collection means is complicated, large, and costly. It is economically disadvantageous. An object of the present invention is to provide a material testing machine provided with a collecting means for solving such a problem. [0006] In order to solve the above-mentioned problems, a material testing machine provided by the present invention provides a means for collecting a film-shaped test piece that has been broken after a test by air from an opening at the tip. Tube, a retracting mechanism for moving the tip of the suction tube forward and backward with respect to the test piece, and suction for stopping and releasing the suction at the retracted position after sucking and holding the broken test piece by suction. It is composed of a control mechanism and a dust box for collecting test pieces sucked into the suction tube. Therefore, when the suction tube advances to the test piece, the test piece is sucked and gripped by the suction force of the opening, so that it is gripped regardless of its position and shape, and the test piece is sucked into the suction pipe. If the dust is collected, the dust is collected in the dust box to ensure the collection. FIG. 1 is a block diagram showing the structure and operation of the present invention.
5 will be described with reference to FIG. 1 and 2
7, components and components indicated by the same reference numerals as those in FIG. 7 are the same as those in FIG. 7, and detailed description thereof will be omitted. FIG. 1 is a view showing a configuration of a material testing machine provided by the present invention in a form similar to that of FIG. 7, and FIGS. 2 to 4 are views showing a process of collecting test pieces after fracture. In the figure, reference numeral 8 denotes an upper suction pipe, and 9 denotes a lower suction pipe, both of which suck air from a trumpet-shaped tip opening.
Reference numeral 10 denotes a suction tube fixing bracket, which is an upper suction tube 8 and a lower suction tube 9.
Is fixed to the turning shaft 7. Reference numeral 13 denotes a low pressure source for generating an air suction force, that is, a negative pressure in a suction mechanism, and specifically, a vacuum pump. A flexible hose 12 connects the low pressure source of the suction mechanism 13 to the upper suction pipe 8 and the lower suction pipe 9. A connection joint 11 fixes the flexible hose 12 to the upper suction pipe 8 and the lower suction pipe 9. The air suction force, that is, the negative pressure, generated by the suction mechanism 13 is transferred to the upper suction pipe 8 and the lower suction pipe 9 through the movable flexible hose 12 and the connection joint 11.
To generate air suction at these inlets.
The turning drive section 6 has a function of moving the upper suction pipe 8 and the lower suction pipe 9 fixed to the turning shaft 7 by the suction pipe fixing bracket 10. The construction of the material testing machine according to the present invention is as described above, and its operation will now be described. When the tensile test of the film is completed, the suction portions of the upper suction pipe 8 and the lower suction pipe 9 are displaced in the direction of the arrow so as to correspond to the positions of the upper test piece 4U and the lower test piece 4D as shown in FIG. The turning drive 6 is operated. That is, the rotating shaft 7 is driven to rotate, and the upper suction pipe 8 and the lower suction pipe 9 are connected to both the test pieces 4.
Advance to U and 4D. When the tip openings of the upper suction pipe 8 and the lower suction pipe 9 reach the positions of the upper test piece 4U and the lower test piece 4D, the rotation is stopped, and the suction mechanism 13 is operated to generate the air suction force. The air suction force generated at the inlets of the upper suction pipe 8 and the lower suction pipe 9 is shown in FIG.
The two test pieces 4U, 4D are adsorbed at the inlet as shown in FIG. At this time, if the claws of the upper chuck 1 and the lower chuck 2 are opened, the upper test piece 4U and the lower test piece 4D are released from the upper chuck 1 and the lower chuck 2,
The upper suction pipe 8 and the lower suction pipe 9 are attached and gripped at the inlets. In this state, the turning drive unit 6 is driven to rotate in the reverse direction. By the reverse rotation of the rotating shaft 7 to which the upper suction pipe 8 and the lower suction pipe 9 are attached, both test pieces 4U, 4
D is moved to the collection location shown in FIG. And when it turns backward to the predetermined collection place, the movement operation is stopped,
At the same time, the operation of the suction mechanism 13 is stopped, and the air suction force is reduced to zero. The upper test piece 4 and the lower test piece 5 attached to the inlets of the upper suction pipe 8 and the lower suction pipe 9 due to the air suction force lose the suction force as shown in FIG. . In addition, both test pieces 4U, 4D
When is sucked into the suction pipe, it is collected by a dust box or a filter installed in the piping line. By the way, the sequence operation according to the test order regarding the operation of the turning drive unit 6 and the operation of the suction mechanism unit 13 are controlled and performed by the controller 14. As described above, according to the present invention, when a tensile test is performed by a material tester and the test piece is collected after the test is completed, the test piece is formed by using an air suction force to collect the test piece. Can be automatically and reliably collected. Although the present invention has been described above, it is not limited to the above and illustrated examples but includes various modifications. For example, in the illustrated example, the test piece is driven by a swivel drive unit to drive two suction pipes, an upper suction pipe and a lower suction pipe, to advance and retreat to the test piece after the test is completed, and to suck and move it to a collection place. However, it is not necessary to be limited to such a turning mechanism, and the test piece may be sucked by a single suction pipe having a mechanism whose position can be set, and may be transported to a predetermined collecting position and collected. Alternatively, the two suction pipes may be independently linearly reciprocated to advance and retreat, and the test piece may be collected. In the above description, 2
Although a single suction tube is used, one suction tube is also possible. Further, the test piece is not limited to a film, and can be applied to all film-like test pieces including soft and thin materials. The material testing machine provided by the present invention is as described in detail above. Particularly in the case of automatic collection, it is possible to test a soft material such as a rigid thin film which is difficult to grasp. It is possible to easily and surely grasp the piece, and to smoothly collect the piece. The simple configuration ensures automation and provides an economical material testing machine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a material testing machine provided by the present invention. FIG. 2 is a view showing a process of collecting a post-rupture test piece using the air suction force of the present invention. FIG. 3 is a diagram illustrating a process of collecting a post-fracture test piece using the air suction force of the present invention. FIG. 4 is a view showing a process of collecting a test piece after rupture using the air suction force of the present invention. FIG. 5 is a diagram showing a state in which a rigid film test piece such as a soft material is installed before the test and a state in which the test piece after the test is broken. FIG. 6 is a diagram showing a state in which a rigid test piece such as a hard material is installed before the test and a state in which the test piece after the test is broken. FIG. 7 is a view showing a conventional material testing machine using a collection robot hand. [Description of Signs] 1 --- Upper chuck 2 --- Lower chuck 3 --- Test piece 4 --- Test piece 4U --- Upper test piece 4D --- Lower test piece 6 --- Swivel Driving part 7 --- Swivel shaft 8 --- Upper suction pipe 9 --- Lower suction pipe 10 --- Suction pipe fixing bracket 11 --- Connection joint 12 --- Flexible hose 13 --- Suction mechanism Unit 14 --- Controller

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Claims (1)

(57) [Claims] [Claim 1] Both chucks for gripping the ends of a film-shaped test piece, a test mechanism for relatively displacing both chucks to perform a tensile test, and a test from the chucks In a material testing machine provided with a test piece collecting means for collecting a later test piece, the test piece collecting means is provided with a suction pipe for sucking air from an opening at the tip and a test piece at a tip end of the suction pipe. An advancing / retracting mechanism for advancing / retreating, a suction control mechanism for stopping and releasing suction at a retracted position after sucking and holding the broken test piece by suction, and a dust box for collecting the test piece sucked into the suction pipe. When the test piece is adsorbed on the suction tube, the film-shaped test piece is collected by the advancing / retracting operation and the suction gripping / releasing operation of the suction tube, and the test piece is sucked into the suction tube when the test piece is sucked into the suction tube. Materials testing machine is characterized in that so as to recover the strike box.