Abstract:
A testing device ( 100 ) configured for testing a multihole workpiece ( 10 ) with a plurality of holes ( 12 ), includes a detecting station ( 120 ) and an inspecting box ( 140 ). The detecting station positions a plurality of detecting pins ( 124 ) and a plurality of detecting apparatus ( 128 ). The detecting pins correspond to the holes of the multihole workpiece. The detecting apparatus respond for the multihole workpiece and sending detecting signals. The inspecting box receives the detecting signals from the detecting apparatus of the detecting station, and deals with and shows detecting results.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to testing devices and, particularly, to a testing device for multihole workpieces. 
   2. Description of Related Art 
   Multihole workpieces are widely used in many manufacturing industry. Multihole workpiece usually defines a great amount of holes therein. Referring to  FIGS. 7 and 8 , a multihole workpiece  10  has a plurality of holes  12  defined therein. The holes  12  are manufactured with many punches. However, since some punches tends to fail during the manufacturing process, some holes  12  are not often formed. As the holes  12  are very tinny, operators find it difficult to spot the uncompleted holes, which decrease the efficiency of the assembly process. Therefore, it is very important for the holes  12  in the multihole workpiece  10  to be tested. 
   Conventional detecting methods include a manual testing method and a non-contacting testing method. The manual testing method is that operators lower a needle into each hole of the workpiece so as to test whether the holes is through or not. The manual testing method is simple. However, when there are large numbers of holes, it is possible for the operator to miss the uncompleted holes. In addition, this testing process is time consuming, which affect the efficiency of the testing process. The non-contacting testing method can detect the uncompleted holes of multihole workpiece. However, the structure of the non-contacting testing device is complicated and large in volume. Therefore, it is difficult to move/relocate the non-contacting testing device. In addition, the non-contacting testing device is desired to work in a non-polluting testing environment to avoid components being contaminated by dusts. If the testing device works in a dusty environment, the testing reliability is low. 
   Therefore, a new testing device is desired in order to overcome the above-described shortcomings. 
   SUMMARY OF THE INVENTION 
   One present embodiment of a testing device configured for testing a multihole workpiece with a plurality of holes, includes a detecting station and an inspecting box. The detecting station positions a plurality of detecting pins and a plurality of detecting apparatus. The detecting pins correspond to the holes of the multihole workpiece. The detecting apparatus respond to the multihole workpiece and send detecting signals. The inspecting box receives the detecting signals from the detecting apparatus of the detecting station, and processes and displays detecting results. 
   Other advantages and novel features will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Many aspects of the present testing device can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present testing device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
       FIG. 1  is an isometric view of a testing device according to a present embodiment; 
       FIG. 2  is an isometric view of a detecting station shown in  FIG. 1 ; 
       FIG. 3  is a partially exploded, isometric view of the detecting station shown in  FIG. 2  from one aspect; 
       FIG. 4  is a partially exploded, isometric view of the detecting station shown in  FIG. 2  from another aspect; 
       FIG. 5  is a partially exploded, isometric view of an inspecting box shown in  FIG. 2 ; 
       FIG. 6  is an isometric view of the testing device in use; 
       FIG. 7  is an isometric view of a related art of a multihole workpiece from one aspect; and 
       FIG. 8  is an isometric view of the related art of a multihole workpiece shown in  FIG. 7  from another aspect. 
   

   DETAILED DESCRIPTION OF THE EMBODIMENTS 
   The present testing device is suitable for testing multihole workpiece with a plurality of holes manufactured by punch process, boring process and so on. In this embodiment, the multihole workpiece  10  in  FIG. 7  is as an example to illustrate the present testing device. It is to be understood, however, that the present testing device could be advantageously used in other environments. As such, the present testing device should not be limited in scope solely to them. 
   Referring now to  FIG. 1 , a testing device  100  according to a present embodiment is provided. The testing device  100  includes a detecting station  120 , an inspecting box  140 , and a transmitting conduit  160 . The detecting station  120  is connected to the inspecting box  140  with the transmitting conduit  160 . 
   Referring also to  FIG. 2 , the detecting station  120  includes a base  121 , a seat  122 , a plurality of detecting pins  124 , a signal output apparatus  125  and four detecting apparatus  128 . The base  121  is fixedly mounted on the seat  122 . The detecting pins  124 , and the detecting apparatus  128  are disposed on the base  121 . The signal output apparatus  125  is positioned at one side of the base  121  and the seat  122 . 
   Referring to  FIGS. 3 and 4 , the base  121  is a rectangular board, and the shape of the base  121  is similar to the multihole workpiece  10 . The base  121  includes an upper surface  1212  and a lower surface  1214 . 
   The base  121  defines four countersinks  1215  and four receiving holes  1219  at four corners thereof. Each countersink  1215  is used for receiving bolts (not shown). Each receiving hole  1219  is used for receiving a corresponding detecting apparatus  128 . 
   The base  121  defines a plurality of pin holes  1213 ,  1217  therein. The arrange of the pin holes  1213 ,  1217  is similar to that of the holes of the multihole workpiece  10 . Each pin hole  1213 ,  1217  is a through hole communicating with the upper surface  1212  and the lower surface  1214  of the base  121 . Each pin hole  1217  is configured for receiving a corresponding detecting pin  124 . 
   Each detecting pin  124  is substantially cylindrical. One end of each detecting pin  124  is tightly engaged into a corresponding pin hole  1213 ,  1217 , the other end thereof extends outwardly from the base  121  of the detecting station  120 . An outer diameter of each detecting pin  124  is smaller than that of each hole  12  of the multihole workpiece  10 . With the diameter and the height of detecting pins  124  being smaller than each hole  12 , the detecting pins  124  pass through a corresponding hole  12  of the multihole workpiece  10 . 
   The seat  122  is a flat board, and the size is substantially the same as the base  121 . The seat  122  defines four bolt holes  1222  at four corners thereof corresponding to the countersinks  1215  of the base  121 . The seat  122  defines a H-shape notch  1224  on a surface thereof. The notch  1224  includes a middle notch  1226  and two side notches  1228 . The middle notch  1226  communicates with the two side notches  1228 . One end of the middle notch  1226  extends through one side of the seat  122 . 
   The signal output apparatus  125  is used for being positioned at the side of the seat  122  and the base  121  and partially received in the middle notch  1226 . The signal output apparatus  125  is electrically connected to the inspecting box  140  with the transmitting conduit  160 . 
   Each detecting apparatus  128  includes a cylindrical detector  1282  and a wire  1284 . The height of each detector  1282  may be adjusted, and one end of each detector  1282  is electrically connected to the wire  1284 . Each detector  1282  is fixed in a corresponding receiving hole  1219  by means of adhesive or thread. The wire  1284  of the detecting apparatus  128  may pass through the receiving hole  1219 , and further extend through the notch  1224  to the signal output apparatus  125 . 
   Referring to  FIG. 5 , the inspecting box  140  is a detecting control apparatus. The inspecting box  140  may receive the electronic signal from the detecting apparatus  128 , and automatically display the quantity of the satisfied product. The inspecting box  140  includes a cabinet  142 , a display apparatus  143 , two indication apparatus  144 , an operation apparatus  145 , a power apparatus  146 , a signal input apparatus  147  and a signal processor  148 . 
   The cabinet  142  is an airtight, rectangular box, and includes an upper board  1421 , a lower board  1423 , four side boards  1425 , and a cover board  1426 . The upper board  1421 , the lower board  1423  and the side boards  1425  may be fixed with bolts. The display apparatus  143  is positioned on a front side boards  1425  of the cabinet  142 . The two indication apparatus  144  are positioned on the front side boards  1425  adjacent to the display apparatus  143 . The indication apparatus  144  may respectively show whether the tested product is the satisfied product or the unsatisfied product or not. A right side board  1425  adjacent to the front side board  1425  defines a concave room  1427 . The operation apparatus  145  includes a plurality of buttons, and is positioned in the concave room  1427 . 
   The power apparatus  146  includes a power switch  1462 , a power socket  1464 , a rectifying supply  1466  and a resist-blast wire  1468 . The power switch  1462  is positioned in the concave room  1427 . The cover board  1426  is used for covering the concave room  1427  of the side board  1425 . The signal input apparatus  147  and the power socket  1464  are located on a back side board  1425  of the cabinet  142 . The rectifying supply  1466  and the signal processor  148  are disposed in the lower board  1423 . The signal processor  148  may comprise the AT89C52 chip made by Atmel Corporation Company in USA. The signal processor  148  is served as a main control element. 
   The transmitting conduit  160  are made up of a plurality of wires used for transmitting signal. One end of the transmitting conduit  160  is connected to the signal output apparatus  125 , the other end thereof is connected to the signal input apparatus  147  of the inspecting box  140 . 
   In assembly, firstly, the detecting pins  124  are respectively embedded in a corresponding pin hole  1213 ,  1217  on the base  121 . Then, the four detecting apparatus  128  are respectively positioned in a corresponding receiving hole  1219  of the base  121 . The wire  1284  of each detecting apparatus  128  extends through the receiving hole  1219  to the notch  1224  of the seat  122 . After that, the signal output apparatus  125  is secured in one side of the seat  122  and is partially received in the middle notch  1226 . The wires  1284  are electrically connected to the signal output apparatus  125 . Finally, the base  121  is fixed on the seat  122  with four bolts engaging in the bolt holes  1222  and the countersinks  1215 , thereby completing the assembly of the detecting station  120 . 
   The lower board  1423  and the side boards  1425  are connected with bolts to form a box with an open on a top thereof. Then, the display apparatus  143 , the indication apparatus  144 , the operation apparatus  145 , the power apparatus  146 , the signal input apparatus  147  and the signal processor  148  are provided at a corresponding position of the cabinet  142 , and electrically connected with each other. After that, the upper board  1421  is placed on top of the four side boards  1425  to enclose the cabinet  142 . A connection among the boards is coated with sealing glue so as to prevent blast dust to enter the cabinet  142 . The airtight design of the cabinet  142  may avoid producing electric arc or electrostatic to blast dust. Finally, the cover board  1426  is pivotally connected to the side board  1425  of the cabinet  142 , and covers the concave room  1427 . Therefore, the assembly process of the inspecting box  140  is completed. 
   In use, referring to  FIG. 6 , the resist-blast wire  1468  is electrically connected to a power supply. The cover board  1426  of the inspecting box  140  is opened, and the power switch  1462  is turned on. The operation apparatus  145  is reset, and the cover board  1426  is closed to prevent dust entering the concave room  1427 . 
   After that, the multihole workpiece  10  is placed on the base  121  of the detecting station  120 . The holes  12  of the multihole workpiece  10  are aligned with the detecting pins  124  of the detecting station  120 . If the holes  12  of the multihole workpiece  10  are completely formed, the multihole workpiece  10  stays on top of the base  121 . At the same time, the detecting apparatus  128  detect the multihole workpiece  10 , and generate a corresponding signal. The signal is transmitted to the inspecting box  140 . The inspecting box  140  controls the indication apparatus  144  to show whether the multihole workpiece is satisfied. If the holes  12  of the multihole workpiece  10  are left out or uncompleted, the multihole workpiece  10  will resist by the detecting pins  124  so as not to stay on top of the base  121 . Therefore, the four detecting apparatus  128  cannot respond to the multihole workpiece  10 . The indication apparatus  144  will then indicates that the multihole workpiece  10  is not satisfied. 
   A main advantage of the present testing device is that the detecting pins  124  with the detecting apparatus  128  detect whether the multihole workpiece is satisfied, and the inspecting box  140  will record and display the detecting signal of the detecting apparatus  128 . This structure is simple and the manufacturing costs are low. In addition, the testing device will not be affected with outside environment, which increase the reliability of the testing process. Furthermore, the inspecting box  140  uses an airtight cabinet  142  to enclose the elements in the inspecting box  140 . Therefore, the dusts from the outside environment are isolated from the inspecting box  140 . 
   Understandably, the testing device may test different configuration multihole workpiece. The shape of the base of the testing device needs to conform the shape of the tested multihole workpiece. 
   It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the invention.