JP2009052891A - Inspection device for casting crude material with hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection device for a casting crude material with a hole, capable of inspecting exactly a surface physical property of the casting crude material with the hole of low dimensional precision before finishing work, conveyed on a conveying line, and capable of detecting exactly a flaw thereof. <P>SOLUTION: An advancing and retracting mechanism 3 is provided to advance and retract a floating device 5 toward/from the casting crude material S with the hole, in an upper part of an inspection zone 1 for stopping the casting crude material S with the hole conveyed on the conveying line 2, a copying mechanism 50 is provided to be engaged with a plurality of molding hole C insides formed on molding upper face of the casting crude material S with the hole and to copy an inclination to an X-/Y-direction on the molding upper face of the casting crude material S with the hole, in the floating device 5, a sensor 4 is attached to the copying mechanism 50, so as to detect the flaw and to inspect the surface physical property, by bringing a plane contact 4a into close contact with the molding upper face of the casting crude material S with the hole, the copying mechanism 50 is inclined thereby to get in parallel to the casting crude material S with the hole in response to the inclination of the molding hole C of the casting crude material S with the hole, and the plane contact 4a of the sensor 4 is brought exactly into close contact with the molding upper face of the casting crude material S with the hole. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a perforated cast coarse material inspection apparatus for inspecting metal surface properties and flaw detection by bringing a flat contact surface of a sensor into close contact with the surface of a perforated cast coarse material.

  Conventionally, when conducting electrical property detection with an eddy current sensor and conducting metal flaw detection with an ultrasonic sensor, it is necessary to bring the eddy current sensor or ultrasonic sensor into close contact with the surface of the object to be inspected. There is one in which an urging means is provided and a worker holds a flexible probe in a holding portion so that an operator holds the probe by hand and makes contact with a surface to be inspected (for example, see Patent Document 1). In addition, in order to bring the ultrasonic sensor into close contact with the object to be inspected, there is one in which the scanning mechanism is attracted to the test body by a magnet and the probe integrated with the scanning mechanism is brought into close contact with the test body by a compression spring (for example, Patent Document 2).

However, since the thing of patent document 1 hold | grips a probe with a hand and makes a flaw detection coil contact an inspection object surface and inspects, there exists a problem that it cannot incorporate in a conveyance line and can automatically inspect. In addition, since the inspection is carried out by hand, there is a problem that the pressure to be brought into contact is not stable and the detection accuracy tends to vary. In addition, since the inspection in Patent Document 2 is performed by adsorbing the scanning mechanism to the test body, there is a problem that it is difficult to automatically inspect by incorporating it in the transport line. There is a problem that it is difficult to inspect the physical properties of the metal surface with a current sensor.
Japanese Patent Application No. 2006-47036 Japanese Patent Laid-Open No. 7-174793

  It is an object of the present invention to provide a perforated cast coarse material inspection apparatus capable of accurately performing surface physical properties and flaw detection of a perforated cast rough material having a low dimensional accuracy before finishing that is transported on a transport line. To do.

  The present invention provides an advancing / retreating mechanism for moving the floating device forward and backward toward the cast coarse material with holes at the upper part of the inspection zone for stopping the cast coarse material with holes conveyed on the conveyance line, and the floating device. In addition, a copying mechanism is provided that is fitted in a plurality of forming holes formed on the molding upper surface of the holed cast coarse material and follows the inclination of the molding upper surface of the holed cast coarse material in the X and Y directions. The mechanism is characterized in that a sensor for inspecting flaws and surface physical properties by attaching a flat contact to the molding upper surface of a cast coarse material with holes is attached to the mechanism.

    The copying mechanism is a fitting member that contacts two or three points in the X and Y directions in the molding hole, or three or more electrical connections that are electrically connected in series to contact the molding upper surface of the cast coarse material with holes. A sensor is installed in the copying mechanism, a temperature sensor that detects the surface temperature by contacting the molding upper surface of the perforated cast coarse material is installed in the copying mechanism, or the sensor is supported by a micro-sliding and micro-swingable holding member You may let them.

  The present invention provides an advancing / retreating mechanism for moving the floating device forward and backward toward the cast coarse material with holes at the upper part of the inspection zone for stopping the cast coarse material with holes conveyed on the conveyance line, and the floating device. In addition, a copying mechanism is provided that is fitted in a plurality of forming holes formed on the molding upper surface of the holed cast coarse material and follows the inclination of the molding upper surface of the holed cast coarse material in the X and Y directions. By attaching a flat contact to the upper surface of the cast coarse material with holes in the mechanism and attaching a sensor to inspect flaws and surface properties, the dimensional accuracy is poor before finishing and positioning in the inspection zone of the transport line is not possible. The sensor is arranged in parallel to the cast coarse material with holes by fitting the copying mechanism to the molding hole of the cast coarse material with holes via the floating device even for the cast coarse material with holes. Contact can be securely adhered to the molded upper surface of the perforated cast coarse material obtain accurate detection value. Moreover, by attaching a floating device to the advance / retreat mechanism that advances toward the cast coarse material with holes, automatic inspection is performed by intermittently pressing the sensor against the surface of the cast coarse material with holes conveyed on the conveyance line. It becomes possible, and productivity can be improved significantly.

  In addition, by adopting the copying mechanism as a fitting member that contacts at two or three points in the X and Y directions in the forming hole, the fitting member can be made of a cast coarse material with holes while having a very simple structure. The flat contact of the sensor can be arranged in parallel with the cast coarse material with a hole with high accuracy simply by being fitted into the forming hole.

  Furthermore, the scanning mechanism is parallel to the holed cast coarse material by arranging three or more electrically connected sensors in series in contact with the molding upper surface of the holed cast coarse material. Can be reliably detected by the continuity of the continuity sensor, so that no inspection failure occurs. Further, by causing power to be supplied to the sensor by conduction of all the continuity sensors, it is possible to eliminate the occurrence of defective inspection. In addition, the power supply to the sensor can be made extremely inexpensive because it is only necessary to connect each continuity sensor and the sensor in series.

  By providing a temperature sensor that detects the surface temperature in contact with the molding upper surface of the cast coarse material with holes, the detection error of the sensor caused by the heat of the cast coarse material with holes can be compensated, so high accuracy The test result can be obtained.

  In addition, by supporting the sensor on a micro-sliding and micro-swingable holding member, the flat contact of the sensor is parallel to the molding upper surface of the perforated cast coarse material even when the scanning mechanism is insufficient. Therefore, an accurate inspection result can always be obtained without causing an inspection failure due to poor adhesion.

Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a holed cast coarse material S (for example, a cylinder block) conveyed on a conveyance line 2 composed of a roller conveyor for carrying the holed cast coarse material to stop flaw detection and surface property inspection. It is an inspection zone.

  An advancing / retracting mechanism 3 having a floating device 5 attached is attached to the upper part of the gate-shaped frame 2a straddling the conveying line 2 in the inspection zone 1, and the cast-with-holes with holes to be conveyed are conveyed to the front of the portal frame 2a. A stopper mechanism 6 for stopping the material S at a predetermined position is attached. The floating device 5 is provided with a copying mechanism 50 provided with a sensor 4 and a fitting member 52 that is in contact with two or three points in the X and Y directions in the molding hole C.

  The forward / backward moving mechanism 3 for advancing the floating device 5 toward the holed cast coarse material S includes a hydraulic cylinder 30 and guide shafts 31, 31. The other guide shaft 31 has a dog shaft 33 for attaching a dog 32. It is provided. Reference numeral 34 denotes a proximity switch, and the operation of the hydraulic cylinder 30 is controlled by the proximity switch 34 and the dog 32.

  The sensor 4 is composed of a conductivity sensor or an ultrasonic sensor having a flat contact 4a at the tip, and the sensor 4 is attached to the swing plate 51a of the copying mechanism 50 via a holding member 41. The flat contact 4a is projected from the lower surface of the swing plate 51a so as to be in close contact with the molding upper surface of the holed cast coarse material S. The holding member 41 attaches the sensor 4 to the swing plate 51a so as to be able to slide and swing finely, and the parallelism between the copying mechanism 50 and the holed cast coarse material S is insufficient and the holed cast coarse material. The flat contact 4a of the sensor 4 is securely adhered to the upper surface of the cast coarse material S with holes by absorbing the height and inclination of several millimeters generated between S and the sensor 4.

  Further, the holding member 41 is inserted into a large hole 51b that is formed through the swing plate 51a of the floating device 5 and a lower end of an elastic member 41b such as a spring or rubber. The sensor 4 is maintained in an upright state by contacting the outer flange of the body 41a with an annular spring receiving plate 41d attached to the swing plate 51a and contacting the upper end with the concave step portion of the swing plate 51a. Yes.

  Therefore, when the sensor 4 is brought into pressure contact with the molding upper surface of the holed cast coarse material S via the floating device 5 in a state where a slight inclination is generated between the holed cast coarse material S and the copying mechanism 50, the holding member 41. The flat contact 4a of the sensor 4 is brought into close contact with the molding upper surface of the holed cast coarse material S by absorbing the inclination by slightly swinging or sliding slightly against the urging force of the elastic member 41b.

  The floating device 5 includes a support plate 50a supported by the hydraulic cylinder 30 and the guide shaft 31 of the advance / retreat mechanism 3, a swing plate 51a disposed opposite to the support plate 50a at a predetermined interval, and a support plate 50a. A ball joint 53 that is engaged with the conical recess 50b and the inverted conical recess 51b of the swing plate 51a, and the swing plate 51a and the support plate 50a wound around the connecting pin 53a of the ball joint 53 are connected to each other. It consists of a spring 54 that urges in a separating direction. For this reason, the swing plate 51a is brought into a floating state biased by the spring 54 with respect to the support plate 50a, so that the deviation in the height direction of the copying mechanism 50 is absorbed by the spring 54.

  Further, as shown in FIG. 3, the ball joints 53 are disposed at the four corners of the support plate 50a and the swing plate 51a, and the support plate 50a and the swing plate 51a are cast by the floating device 5 with holes. In order not to interfere with the rough material S, a chevron portion is formed in which a portion to which the both ball joints 53 are attached is projected outward.

  The fitting member 52 includes a substantially rhombic two-point contact piece 52a and a substantially triangular three-point contact piece 52b. As shown in FIG. 3, the two-point contact piece 52 a has a substantially rhombus shape so that the long side can be contacted at two points on the inner surface of the forming hole C, for example, in the Y direction. It follows the inclination in the Y direction. Further, as shown in FIG. 4, the two-point contact member 52a has a side surface tapered so that the insertion into the molding hole C is smoothly performed.

  Further, as shown in FIG. 3, the three-point contact piece 52b of the fitting member 50 has a substantially triangular shape so that each vertex can contact the inner surface of the forming hole C at three points in the X and Y directions. It follows the inclination of the molding upper surface of the cast coarse material S in the X and Y directions. Further, as shown in FIG. 4, the three-point contact piece 52b has a side surface tapered to be smoothly inserted into the molding hole C.

  The reason why the two-point contact piece 52a and the three-point contact piece 52b of the fitting member 52 are fitted into the forming hole C of the holed cast coarse material S for copying is as follows. This is because a cylinder sleeve is inserted into the cylinder hole (molding hole C) formed in the material S, and positioning can be performed with high accuracy. In the preferred embodiment, the fitting member 52 is composed of the two-point contact piece 52a and the three-point contact piece 52b, but two two-point contact pieces 52a may be used. In this case, one two-point contact piece 52a needs to be arranged, for example, in the X direction with respect to the molding upper surface, and the other two-point contact piece 52a needs to be arranged in the Y direction. If two three-point contact pieces 52b are used, parallelism can be obtained with higher accuracy.

  The stopper mechanism 6 is for stopping the cast coarse material S with a hole, which is fed on the conveying line 2 made of a roller conveyor, in the inspection zone 1, and is advanced by the hydraulic cylinder 60 and the hydraulic cylinder 60 to be cast with a hole. It comprises a stopper 61 that abuts the upper side surface of the coarse material S.

  Reference numeral 7 denotes a temperature sensor such as a thermocouple provided in the copying mechanism 50. The temperature sensor 7 detects the temperature of the cast coarse material S with holes and compensates the detected value detected by the sensor 4 based on the detected temperature. This prevents a decrease in inspection accuracy due to temperature fluctuations. The temperature sensor 7 is fitted into the sleeve 70 with an arcuate contact surface at the tip thereof extended, and the sleeve 70 is slidably fitted into a sleeve 71 attached to the swing plate 51a. And is biased by the spring 72 so as to protrude toward the holed cast coarse material S, and the arc-shaped contact surface is brought into contact with the holed cast coarse material S at a constant pressure. Detection errors due to wear and contact pressure fluctuations are prevented.

  Reference numeral 8 denotes three continuity sensors having contacts provided in the copying mechanism 50. The continuity sensors 8 are electrically connected in series and arranged on the swing plate 51a. It is confirmed that the copying mechanism 50 is parallel to the holed cast coarse material S when each conduction sensor 8 is conducted. Further, in the continuity sensor 8, the contacts at the apex portion of the isosceles triangle are arranged in the center line shape of the cast coarse material S with holes, and the two contacts at the bottom corner portions are arranged at symmetrical positions on the center line. However, the arrangement is not limited to such an arrangement, and three or more continuity sensors 8 are arranged at arbitrary positions on the swinging plate 51a to follow the inclination of the holed cast coarse material S. Needless to say, it is only necessary to be able to confirm whether or not 50 is copying.

  Furthermore, the continuity sensor 8 supplies power to the sensor 4 and has a switch function that automatically supplies power to the sensor 4 when all the continuity sensors 8 are turned on. For this reason, it is possible to accurately prevent the occurrence of an inspection failure due to the adhesion failure of the sensor 4.

  Reference numeral 9 denotes a calibration mechanism that calibrates the measured value of the sensor 4 when the sensor 4 is a conductivity sensor. The calibration mechanism 9 includes a calibration block that contacts the sensor 4 as a conductivity sensor, and a flat surface of the sensor 4. It comprises an advance / retreat mechanism 90 that advances the calibration block to the position of the contact 4a. Then, the sensor 4 is calibrated by bringing the flat contact 4a of the sensor 4 into contact with a calibration block for obtaining a standard value, and this calibration is performed every inspection or every fixed period.

  In such a configuration, when a holed cast coarse material S as a cylinder block conveyed on the conveyance line 2 to the inspection zone 1 is detected by a passage sensor (not shown), the hydraulic cylinder 60 of the stopper mechanism 6 is detected. And the stopper 61 is projected on the passage line of the holed cast coarse material S. Therefore, the cast coarse material S with holes hits the stopper 61 and stops at a predetermined position in the inspection zone 1.

  When the cast coarse material S with holes is stopped, the stopper 61 of the stopper mechanism 6 is retracted so as not to interfere with the floating device 5, and then the hydraulic cylinder 30 of the advance / retreat mechanism 3 is operated to advance the floating device 5. Thus, the copying mechanism 50 is lowered toward the holed cast coarse material S. By this lowering, the two-point contact piece 52a and the three-point contact piece 52b of the fitting member 52 are fitted into the forming hole C (cylinder hole) of the cast coarse material S with holes.

  When the two-point contact piece 52a and the three-point contact piece 52b of the fitting member 52 are inserted into the forming hole C, the copying mechanism 50 can pass through the floating device 5 on the upper surface of the cast coarse material S with holes X · Y. It follows the inclination of the direction. This is because the support plate 50a fixed to the advance / retreat mechanism 3 is connected to the swing plate 51a via the both ball joints 53 and the spring 54, so that the swing of the copying mechanism 50 is the conical recess 50b of the support plate 50a. And the two-ball contact piece 52a and the three-point contact piece 52b of the swing plate 51a are formed in the molding hole C. The swinging motion is transmitted to the support plate 50a by fitting to the forward / backward movement mechanism 3 without causing any inconvenience.

  In this way, the copying mechanism 50 follows the inclination in the X and Y directions of the molding upper surface of the holed cast coarse material S. Therefore, the flat contact 4a of the sensor 4 attached to the copying mechanism 50 is made of the holed cast coarse material S. It becomes parallel to the molding upper surface. At this time, if there is a minute inclination that could not be absorbed between the holed cast coarse material S and the copying mechanism 50, the minute inclination is absorbed by the holding member 41. The material S will be closely adhered to the molding upper surface. Further, if there is a deviation in the height direction of the copying mechanism 5, it is absorbed by the spring 54 of the floating device 5.

  When the sensor 4 is in close contact with the molding upper surface of the holed cast coarse material S, each contact point of the three conduction sensors 8 electrically connected in series contacts the molding upper surface of the holed cast coarse material S. Thus, the sensor 4 is supplied with power, and the sensor 4 in which the flat contact 4a is brought into close contact with the cast coarse material S with holes performs flaw detection or conductivity detection.

  Further, at the time of flaw detection or conductivity measurement by the sensor 4, the surface temperature of the cast coarse material S with holes is measured by the temperature sensor 7 such as a thermocouple, and based on the measured value, temperature compensation of the measurement value by the sensor 4 is performed. Accurate measurement values are obtained.

  The sensor 4 is a conductivity sensor for inspecting the physical properties of the surface of the holed cast coarse material S or an ultrasonic sensor for flaw detection of the holed cast coarse material S. The flat contact 4a is used as an object to be inspected. Needless to say, it is effective for various sensors to be brought into close contact with each other.

It is a front view which shows preferable embodiment of this invention. It is a side view similarly. It is a top view which shows a rocking | fluctuation plate. It is a side view similarly. It is sectional drawing which shows the conductivity sensor attached to the rocking | fluctuation plate. It is sectional drawing which expands and shows a floating apparatus. It is sectional drawing which shows a state similarly similarly. It is sectional drawing which shows the temperature sensor attached to the rocking | fluctuation plate.

Explanation of symbols

1 Inspection Zone 2 Transfer Line 3 Advance / Retreat Mechanism 4 Sensor
4a Flat contact surface 5 Floating device 7 Temperature sensor 8 Continuity sensor
41 Holding member
50 Copying mechanism
52 Mating member
52a Two-point contact piece
52b Three-point contact piece C Forming hole S Casting coarse material with hole

Claims (5)

  An advance / retreat mechanism is provided above the inspection zone for stopping the cast coarse material with holes carried on the transfer line, and the floating device is moved forward and backward toward the cast coarse material with holes. A copying mechanism is provided that is fitted in a plurality of forming holes formed on the upper surface of the cast coarse material and follows the inclination of the upper surface of the cast raw material with holes in the X and Y directions. A cast coarse material inspection apparatus with holes, wherein a sensor for inspecting flaws and surface physical properties is attached by attaching a flat contact to the upper surface of the cast coarse material.   2. The cast coarse material inspection apparatus with holes according to claim 1, wherein the copying mechanism is a fitting member that contacts at two or three points in the X and Y directions in the forming hole.   3. The cast coarse material with holes according to claim 1, wherein three or more continuity sensors electrically connected in series contacting the upper surface of the cast coarse material with holes are arranged in the copying mechanism. apparatus.   4. The perforated cast coarse material inspection device according to claim 1, wherein the copying mechanism is provided with a temperature sensor that detects a surface temperature by contacting a molding upper surface of the perforated cast coarse material. 5. 5. The cast coarse material inspection apparatus with holes according to claim 1, wherein the sensor is supported by a holding member that is capable of swinging and swinging finely.

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