JP5210930B2 - Leak test equipment - Google Patents

Description

  The present invention relates to a leak test apparatus, and more particularly, to a leak test apparatus that has a compact configuration and can handle a plurality of shapes of workpieces without the need for replacement.

  There are many indispensable leak tests in automobile parts and gas equipment parts. In a leak tester for performing this leak test, a jig provided with a masking rubber that is in close contact with each workpiece, which is a component to be inspected, is disposed in order to maintain airtightness. As a matter of course, this masking rubber needs to correspond to each workpiece, so it must be a highly specialized masking shape. Therefore, in the case of a workpiece having a plurality of shapes, a jig provided with a dedicated masking rubber is required for each workpiece, and a dedicated leak test station must be prepared for each workpiece.

  In order to cope with such a case, conventionally, a method of arranging jig installation portions in one station has been adopted. That is, when two types of jigs A and B are used, the jig A placement part and the jig B placement part are arranged in one station, and the jig A and the jig B are arranged in accordance with the workpiece. It is a method of operating either one.

  However, in this method, it is still sufficient if there are about two types of workpieces. However, if the number of workpieces is more than that, there is a disadvantage that the station becomes long and takes up space, and that the number of components increases and the cost increases. In addition, there is a problem that the modification and repair require a lot of labor and cost.

  As another method, a method of exchanging and installing jig A and jig B at one station and using them individually has been considered. That is, the jig A and the jig B are provided in one station, and either the jig A or the jig B is set at the inspection position according to the workpiece.

  However, in this method, since the air circuit corresponding to each jig must be prepared individually, the number of circuit parts increases, which not only increases the cost, but also in the case of a workpiece with a complicated shape Has the disadvantage that the circuit becomes complicated and its occupied space increases, resulting in very poor maintainability. In addition, since both jigs move when the jigs are switched, there is a problem that circuit handling becomes very complicated.

JP 2006-62570 A JP 2004-212373 A JP 2001-27575 A JP 2000-121481 A JP-A-9-159565

  As described above, when a leak test is performed on a workpiece having a plurality of shapes, in the conventional method, the equipment becomes larger and takes up space, and in particular, the number of circuit parts increases, resulting in a complicated configuration. In addition, there were major problems in terms of cost and maintenance. Therefore, the present invention provides a leak test apparatus that does not have these problems, is compact, has good operability, can be supplied at a relatively low cost, and can handle two or more types of workpieces. This is the issue.

  The invention described in claim 1 for solving the above-described problem is at least a lower rotation jig that clamps and masks the back side of a workpiece as a test part, and an upper rotation that clamps and masks the surface side of the workpiece. Each of the lower rotating jig and the upper rotating jig has a polygonal cross section, and each has a flat side surface and a workpiece surface. Alternatively, it is possible to load different types of sealing materials provided with masking rubber corresponding to the back surface, and rotate the lower rotating jig and the upper rotating jig to rotate the sealing material corresponding to the type of the workpiece to be tested. A leak test apparatus that enables a leak test to be selected and face each other.

  In one embodiment, the lower rotating jig is rotatable at the rising end, and is docked to the test circuit at the falling end and clamps the back side of the workpiece. The upper rotating jig clamps the surface side of the workpiece at the descending end, docks with the test circuit, and can rotate at other positions.

Further, in one embodiment, further comprises means for clamping the front side and the rear side of the workpiece.

Preferably, means for clamping the front side and rear side of the workpiece, the clamping head having a masking rubber, a clamp cylinder for forward and backward the clamp head, the lifting cylinder head is connected to the lifting plate, the tip The guide head on the end face of the guide rail installation plate, which is fixed on the machine frame base, is composed of a pair of slide shafts fixed to the clamp head and slidably supported by slide guides installed on the lifting plate It can be moved up and down by being installed on a lifting plate that moves up and down.

  The present invention is as described above, and the leak test apparatus according to the present invention includes a lower rotating jig that clamps and masks the back side of a workpiece that is a test part, and an upper side that clamps and masks the front side of the workpiece. Each of the rotating jigs is vertically movable and rotatable, and both the lower rotating jig and the upper rotating jig have a polygonal cross section, and each has a plurality of flat side surfaces on the surface of the workpiece or A plurality of types of sealing materials having masking rubber corresponding to the back surface can be loaded. Therefore, it is possible to perform the leak test by rotating the lower rotating jig and the upper rotating jig, selecting the sealing material corresponding to the type of the workpiece to be tested, and making them face each other. Therefore, it is possible to supply at a relatively low cost, and there is an effect that it is possible to perform a leak test efficiently in response to two or more types of workpieces.

  Further, in the inventions according to claims 2 and 3, the lower rotary jig is automatically docked to the test circuit at the lower end, and the upper rotary jig is automatically docked to the test circuit when the lower end jig is clamped. This eliminates the need for complicated piping installation and piping connection.

It is a front view which shows the basic composition of the leak test apparatus which concerns on this invention. It is a principal part block diagram which shows the effect | action of the leak test apparatus which concerns on this invention. It is the sectional view on the AA line in FIG. It is a figure which shows the clamp state of the workpiece | work in the leak test apparatus which concerns on this invention. It is a figure which shows the example of the upper and lower sealing materials in the leak test apparatus which concerns on this invention. It is the schematic which shows operation | movement (1st process) of the leak test apparatus which concerns on this invention. It is the schematic which shows operation | movement (2nd process) of the leak test apparatus which concerns on this invention. It is the schematic which shows operation | movement (3rd process) of the leak test apparatus which concerns on this invention. It is the schematic which shows operation | movement (4th process) of the leak test apparatus which concerns on this invention. It is the schematic which shows operation | movement (5th process) of the leak test apparatus which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a basic configuration of a leak test apparatus according to the present invention. As shown therein, the leak test apparatus according to the present invention clamps and masks the back side of a workpiece W as a test part. A lower rotating jig 1 that performs the upper side rotating jig 2 that clamps and masks the surface side of the workpiece W is provided in the machine frame 3 so as to be movable up and down and to be rotatable.

  The lower rotating jig 1 and the upper rotating jig 2 both have a polygonal cross section (in the illustrated example, a quadrangular shape), and each of a plurality of flat side surfaces of the lower rotating jig 1 is masked corresponding to the back surface of the workpiece W. The lower sealing material 51 provided with the rubber M is loaded (see FIG. 5). The lower sealing material 51 can be loaded for the types of workpieces W (up to four types in the illustrated example). Moreover, the upper sealing material 52 provided with the masking rubber M corresponding to the surface of the workpiece W is loaded on each of the plurality of flat side surfaces of the upper rotating jig 2 (see FIG. 5). The upper sealing material 52 can be loaded for the types of workpieces W (up to four in the illustrated example).

  The lower rotating jig 1 is rotatably installed on a lower base 5 arranged at a distance on the machine base 4 and is driven to rotate by a servo motor 11, and a lower test circuit device. It moves up and down by the action of the hydraulic lifting cylinder 8 installed on the machine base 4 between the lowermost position docked by the head 16. In order to support this operation, four guide shafts 6 are typically erected on the machine base 4 through the lower base 5, and each guide shaft 6 is slidably inserted on the lower base 5. A guide 7 is erected.

  A pair of support frames 10 are provided on the lower base 5, and the lower rotating jig 1 is pivotally supported between the support frames 10. On one side (left side in FIG. 1), a servo motor 11 for rotationally driving the lower rotary jig 1 is installed. A drive gear 12 is fixed to the output shaft of the servo motor 11, and the drive gear 12 meshes with a driven gear 13 fixed on the shaft of the lower rotary jig 1. Thus, the lower rotary jig 1 is rotationally driven by the servo motor 11 via the drive gear 12 and the driven gear 13.

  A lower test circuit device is installed on the machine frame base 4. The lower test circuit device includes a circuit head 16 that is docked with the lower rotating jig 1, and the circuit head 16 is loosely inserted into a through hole 17 formed in the lower base 5 (see FIG. 2). . As a result, when the lower base 5 is in the lowered state, the circuit head 16 protrudes from the through hole 17 and is docked to the lower rotary jig 1.

  An air circuit is disposed inside the lower rotary jig 1, and a connection port projects from the open end thereof, and this connection port is connected to the circuit head 16. A connection port located on the lowermost surface of the lower rotary jig 1 connected to the circuit head 16 communicates with a connection port located on the uppermost surface (work loading surface) of the lower rotary jig 1. Accordingly, the leak test air supplied from the circuit head 16 is supplied into the work W from the connection port located on the upper surface of the lower rotary jig 1 (in the case of the internal pressure type). Note that the principle of the leak tester incorporated in this apparatus is general.

  In the above configuration, the lower rotary jig 1 is lifted by the action of the lift cylinder 8 from the state where it is docked to the circuit head 16 of the lower test circuit device, and is driven by the servo motor 11 at the lift end to be predetermined. Rotate the angle. Needless to say, the lower rotary jig 1 is lifted by the lower base 5, the linear guide 7, the support frame 10, the servo motor 11, and the lower rotary jig 1. Is performed as one.

  On the other hand, the upper rotating jig 2 is supported by a hanger that is driven up and down by a lifting cylinder 22 installed on the upper plate 21 of the machine frame 3. The hanger includes a circuit installation plate 24 of the upper test circuit device to which the head of the elevating cylinder 22 is fixed, and a support plate that is suspended from the circuit installation plate 24 in a state of being movable in a direction perpendicular to the circuit installation plate 24. 25. A lower end of a guide shaft 27 for supporting the lifting operation is fixed to the circuit installation plate 24. The guide shaft 27 is slidably supported by linear guides 28 disposed on, for example, both sides of the elevating cylinder 22 on the upper plate 21.

  The upper rotary jig 2 abuts on the upper surface of the workpiece W and clamps the workpiece W from the upper side, and is released from the lowest lowered position docked to the circuit head 26 of the upper test circuit device and the docked state with respect to the circuit head 26 and rotates. Move up and down between the highest possible positions. In order to support the operation, for example, guide shafts 29 are vertically provided at the four corners of the back surface of the circuit installation plate 24, and through holes for inserting the guide shafts 29 at positions corresponding to the guide shaft 29 of the support plate 25. And a linear guide 30 that slidably receives the guide shaft 29 is installed at a position corresponding to the guide shaft 29 on the back surface thereof. Further, the support plate 25 is formed with a through hole through which the circuit head 26 can be moved up and down.

  With the above configuration, the support plate 25 is movable in the vertical direction with respect to the circuit installation plate 24 while being supported by the guide shaft 29 by the action described later.

  A pair of support frames 31 are provided on the lower surface of the support plate 25, and the upper rotary jig 2 is pivotally supported between the support frames 31. On one side (left side in FIG. 1), a servo motor 32 that rotationally drives the upper rotary jig 2 is installed. A drive gear 33 is fixed to the output shaft of the servo motor 32, and the drive gear 33 is engaged with a driven gear 34 fixed on the shaft of the upper rotary jig 2. Thus, the upper rotary jig 2 is rotationally driven by the servo motor 32 via the drive gear 33 and the driven gear 34.

  41 is a front clamping unit that clamps the front side of the workpiece W, and preferably a lift plate 45 that moves up and down along the guide rail 44 on the end surface of the guide rail installation plate 43 that is opposed to the machine base 4. It is installed and can be moved up and down (see FIGS. 1 and 3). The front clamp unit 41 includes a clamp head 46 provided with a masking rubber M, a clamp cylinder 47 that moves the clamp head 46 back and forth, and a lift cylinder 48 that is attached to the machine frame 3 and is connected to the lift plate 45. And a pair of slide shafts 50 that are slidably supported by slide guides 49 installed on the lifting plate 45 (see FIG. 3).

  Reference numeral 42 denotes a rear surface clamping unit that clamps the rear surface side of the work W, and preferably, an elevating plate 55 that moves up and down along the guide rail 54 on the end surface of the guide rail installation plate 53 provided on the machine frame base 4. It is installed and can be moved up and down (see FIGS. 1 and 3). The rear clamp unit 42 includes a clamp head 56 provided with a masking rubber M, a clamp cylinder 57 that moves the clamp head 56 forward and backward, and a lift cylinder 58 that is attached to the machine frame 3 and is connected to the lift plate 55. And a pair of slide shafts 60 that are slidably supported by slide guides 59 installed on the lifting plate 55 (see FIG. 3).

  In the illustrated embodiment, the configuration of the clamp head 46, the clamp cylinder 47, the slide guide 49, and the pair of slide shafts 50 in the front clamp unit 41, and the clamp head 56, the clamp cylinder 57, and the slide guide 59 in the rear clamp unit 42 are illustrated. And the structure of a pair of slide shaft 60 is each arrange | positioned at two steps (or more). In this case, the upper and lower clamp heads 46 and 56 respectively correspond to different kinds of workpieces W, like the upper and lower sealing materials 51 and 52, and can be switched and used by the action of the lifting cylinders 48 and 58. it can.

  The operation of the leak test apparatus according to the present invention having the above configuration will be described. First, a plurality of types of seal materials 51 and 52 corresponding to the workpiece W to be leak-tested are mounted on the lower rotary jig 1 and the upper rotary jig 2, respectively. To do. In the case of the lower rotary jig 1, the mounting operation is performed by rotating it by a predetermined angle by the action of the servo motor 11 in a state where it is lifted by the action of the lifting cylinder 8 and separated from the circuit head 16. In the case of No. 2, the rotation is performed by a predetermined angle by the action of the servo motor 32 when it is lifted by the action of the elevating cylinder 22 and enters the unclamped state with respect to the workpiece W. In the illustrated apparatus, four pairs, in other words, the sealing materials 51 and 52 corresponding to four types of workpieces W can be installed.

  Further, the lifting cylinders 48 and 58 of the front clamp unit 41 and the rear clamp unit 42 are operated so that the clamp heads 46 and 56 are set so as to correspond to the workpiece W to be tested.

  In the leak test, the lower rotary jig 1 and the upper rotary jig 2 are rotated so that the seal materials 51 and 52 corresponding to the workpiece W to be leak tested are opposed to each other. In this state, the workpiece W to be tested is set on the sealing material 51 of the lower rotary jig 1. When the work W is set with the servo motor 11 acting on the side of the set obliquely (for example, inclined by 52.5 degrees as shown in FIG. 2), the work becomes easy (seal material 51, The same applies to the loading operation 52). In addition, although the set operation | work of the workpiece | work W and the pick-up from there can also be performed manually, it is typically performed using the robot 62 (refer FIG. 2). Thereafter, in a state where the workpiece W is directed upward by the action of the servo motor 11, the lower rotary jig 1 is lowered by the action of the lifting cylinder 8 and docked to the circuit head 16 (see FIG. 6).

  Thereafter, when the upper rotary jig 2 in which the seal material 52 corresponding to the lower rotary jig 1 is set is lowered by the extending operation of the elevating cylinder 22 (see FIG. 7), first, the seal material 52 comes into contact with the workpiece W, The workpiece W is clamped between the lower rotating jig 1 and the sealing material 51 (see FIG. 8). Thereafter, when the elevating cylinder is further extended, the upper rotary jig 2 and the support plate 25 that supports the upper rotating jig 2 stop at that position, but the circuit head 26 and the circuit head 26 and the guide shaft that are fixed to the circuit installation plate 24. 29 further descends. As a result, the circuit head 26 is docked to the upper rotary jig 2 (see FIG. 9).

  After clamping the front and back of the workpiece W in this manner, first, the clamp cylinder 47 of the front clamp unit 41 is operated to bring the clamp head 46 into contact with the front side of the workpiece W, and then the clamp of the rear clamp unit 42 The front and rear surfaces of the workpiece W are clamped by operating the cylinder 57 and bringing the clamp head 56 into contact with the rear surface side of the workpiece W (FIG. 10). The operation order of the front clamp unit 41 and the operation order of the rear clamp unit 42 may be reversed, or may be simultaneous.

  Thus, after clamping the front and back and front and rear of the workpiece W, test air is supplied through the upper and lower air circuits, and a leak test is performed by a conventional method. After the test is completed, the workpiece W is taken out in the reverse operation to the above and replaced with the next workpiece W to be tested. As described above, the exchange of the workpiece W can be performed automatically and continuously by the robot 62. In addition, it is possible to provide a means for sorting and collecting defective workpieces W.

  Although the present invention has been described in some detail with respect to its most preferred embodiments, it will be apparent that a wide variety of different embodiments can be constructed without departing from the spirit and scope of the invention, the invention being defined by the appended claims. It is not restricted to the specific embodiment other than limiting in.

DESCRIPTION OF SYMBOLS 1 Lower side rotation jig 2 Upper side rotation jig 3 Machine frame 4 Machine frame base 5 Lower base 6, 27 Guide shaft 7, 28 Linear guide 8, 22 Lifting cylinder 11, 32 Servo motor 16 Circuit head 21 Upper plate 24 Circuit installation board 25 Support Plate 41 Front Clamp Unit 42 Rear Clamp Unit 46, 56 Clamp Head 48, 58 Elevating Cylinder 51, 52 Sealing Material

Claims (5)

At least a lower rotary jig that clamps and masks the back side of the workpiece, which is a test part, and an upper rotary jig that clamps and masks the front side of the workpiece are individually movable up and down and rotatable. ,
Each of the lower rotating jig and the upper rotating jig has a polygonal cross section, and is loaded with different types of sealing materials each having a masking rubber corresponding to the front surface or back surface of the workpiece on a plurality of flat side surfaces. Is possible,
A leak test apparatus configured to perform a leak test by rotating the lower rotating jig and the upper rotating jig, selecting the sealing material corresponding to the type of the workpiece to be tested, and facing each other.   2. The leak test apparatus according to claim 1, wherein the lower rotation jig is rotatable at an ascending end, is docked with a test circuit at a descending end, and clamps the back side of the workpiece.   3. The leak test apparatus according to claim 1, wherein the upper rotary jig clamps the surface side of the workpiece at a descending end, docks with a test circuit, and is rotatable at other positions. Furthermore, leak testing apparatus according to any one of 請 Motomeko 1 to 3 comprising a means for clamping the front side and the rear side of the workpiece. Means for clamping the front and rear side of the workpiece, the clamping head having a masking rubber, a clamp cylinder for forward and backward said clamping head, a lifting cylinder head is connected to the lifting plate, clamped to the distal end The head is fixed and includes a pair of slide shafts 50 that are slidably supported by slide guides installed on the lifting plate, along the guide rails on the end surfaces of the guide rail installation plates that are installed on the machine frame base. The leak test apparatus according to claim 4, wherein the leak test apparatus can be moved up and down by being installed on a lifting plate that moves up and down.

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