KR101607928B1 - Auto crack detecting apparatus of input shaft for eps - Google Patents

Abstract

The present invention relates to an insertion axis defect automatic inspection apparatus, which comprises a base frame; A loading part rotatably installed on the base frame, the loading part loading a plurality of insertion shafts; A defect inspection unit provided at one side of the loading unit and inspecting the insertion shaft transferred from the loading unit for defects by an eddy current inspection system; A marking unit provided at one side of the defect inspection unit to perform marking on a normal insertion axis having no defects in the defect inspection unit; An unloading unit for discharging the normal insertion shaft after marking is completed in the marking unit; A defective discharge unit for discharging a defective insertion axis in which a defect is found as a result of inspection in the defect inspection unit; And a transfer unit for sequentially transferring the insertion axis to the loading unit, the defect inspection unit, the marking unit, and the unloading unit.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic checking apparatus for an insertion shaft defect for an electric power steering,

The present invention relates to an automatic insertion axis defect inspection apparatus, and more particularly, to an automatic insertion axis defect inspection apparatus that can automatically inspect fine defects of an insertion axis used for electric power steering of a vehicle by using an eddy current method.

The electric power steering (EPS) of a vehicle is an auxiliary device that allows the steering wheel to rotate using an electric motor other than hydraulic. EPS does not borrow engine output, so it has the advantage of operation even when the engine is turned off and there is a feature that the driver can control easily.

The in shaft is the core part of the EPS. The insertion shaft controls the electric motor to manipulate the steering wheel and change the direction of the automobile wheel using the flow generated between the high pressure fluid mechanically connected to the vehicle handle and the groove formed on the outer circumference. And provides a physical displacement value of the electronic sensor.

Accordingly, when there is a micro-defect in the insertion shaft, an abnormality occurs in the displacement value of the electronic sensor, thereby causing a problem in the steering function of the vehicle and affecting safety of the driver. Therefore, it is necessary to inspect the insertion axis for defects in the production stage of the insertion axis.

The defect inspection of the conventional insertion axis has been manually performed by the operator. The insertion axis is strictly controlled in size due to the importance of its function, and it is required to detect micro cracks in micro units. As a result, the time required for defect inspection becomes longer and the production speed is lowered.

Regarding this, Patent No. 10-1252458 discloses "Eddy current inspection system and method for selecting good products of a test body ". Although the disclosed eddy current inspection system and method disclose inspection of an EUT by eddy current testing, it is difficult to apply it to an inserting axis in which both microcracks on outer and inner surfaces must be detected.

Accordingly, there is a need for a new type of inserting axis defect inspection apparatus which can detect not only the outside but also the internal defects while inspecting the inserting axis automatically, thereby ensuring productivity, accuracy and reliability.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic insertion axis defect inspection apparatus capable of automatically inspecting defects in an insertion axis of EPS.

It is another object of the present invention to provide an apparatus for inspecting, marking, and discharging the insertion axis automatically and automatically proceeding without operator intervention in a continuous process from loading of the insertion axis to marking and discharging.

It is still another object of the present invention to provide an apparatus for automatically inspecting an insertion axis defect in which a defect insertion axis in which a defect is generated as a result of inspection can be separately discharged.

It is still another object of the present invention to provide an insertion axis defect automatic inspection apparatus capable of increasing inspection efficiency by sequentially inspecting a plurality of insertion axes at a time, thereby shortening inspection time.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by an automatic insertion inspecting apparatus for inspecting fine defects of an input shaft for electric power steering. The automatic insertion axis defect inspection apparatus of the present invention comprises: a base frame; A loading part rotatably installed on the base frame, the loading part loading a plurality of insertion shafts; A defect inspection unit provided at one side of the loading unit and inspecting the insertion shaft transferred from the loading unit for defects by an eddy current inspection system; A marking unit provided at one side of the defect inspection unit to perform marking on a normal insertion axis having no defects in the defect inspection unit; An unloading unit for discharging the normal insertion shaft after marking is completed in the marking unit; A defective discharge unit for discharging a defective insertion axis in which a defect is found as a result of inspection in the defect inspection unit; And a transfer unit for sequentially transferring the insertion axis to the loading unit, the defect inspection unit, the marking unit, and the unloading unit.

According to one embodiment, the defect inspection unit may include: a test support portion rotatably supporting the insertion shaft; An external inspection unit that advances to an insertion axis supported by the examination support unit and inspects an external defect of the insertion axis; And an inner diameter checking unit that vertically moves up and down with respect to the inserting shaft supported by the inspecting support and inspects a defect inside the inserting shaft inserted into the inserting shaft.

According to an embodiment, the loading section and the unloading section each include a table rotatably provided with respect to the base frame; A plurality of sockets vertically coupled along the outer circumferential surface of the table and inserted and supported by the insertion shaft transferred from the transfer unit; And a first sensing sensor and a second sensing sensor provided at one side of the table for sensing whether the insertion shaft is inserted into the socket.

According to an embodiment of the present invention, the test support unit includes: a support plate spaced apart from the base frame by a predetermined height and having an insertion hole through which the insertion shaft is inserted; A rotation finger disposed coaxially with the insertion hole at a lower portion of the support plate and fixing a lower portion of the insertion shaft; A supporting motor for generating a rotational driving force; A driving unit for transmitting driving force of the supporting motor to the rotation finger to rotate the rotation finger; And a third sensing sensor provided on the support plate for sensing whether the insertion shaft is inserted into the rotation finger.

According to one embodiment, the external inspection unit includes: an external inspection probe that contacts and supports the outer diameter of the insertion shaft inserted into the rotation finger, and conducts an eddy current test; And a probe transferring cylinder which is movably forward and backward at a lower portion of the transferring part and supports the external inspection probe.

According to one embodiment, the inner inspection unit includes: a vertical frame formed perpendicular to the inspection support; A vertical lifting / supporting unit vertically movable up and down in the vertical frame; An internal test probe coupled to a lower portion of the elevation support portion and inserted into the insertion axis and performing an eddy current test; And an elevating motor for elevating and lowering the elevating support portion up and down.

According to an embodiment of the present invention, the marking unit may include: a marking jig supported by the inserting shaft, And a marking head for marking a reference mark on the insertion shaft coupled to the marking jig, the marking jig including: a marking frame coupled to the base frame; A marking socket formed vertically from a bottom surface of the marking frame to insert a lower portion of the insertion shaft; And a marking clamp formed on the side wall of the marking frame such that a gap is formed between the marking frame and the marking frame to fix the insertion axis.

According to one embodiment, the marking head includes: an input unit for receiving a reference mark from the control unit; And a marking pin for marking the reference mark on the surface of the insertion shaft by air pressure based on the reference mark inputted from the input unit.

According to one embodiment, the transfer unit may include: a horizontal shaft horizontally formed in the base frame; A first conveying shuttle, a second conveying shuttle, and a third conveying shuttle provided movably in the horizontal direction along the horizontal axis; And a clamp which is provided below the first transfer shuttle, the second transfer shuttle and the third transfer shuttle and fixes the insertion shaft, and the clamp is provided so as to be movable up and down and forward and backward with respect to the transfer shuttle.

According to one embodiment, the first transfer shuttle second transfer shuttle and the third transfer shuttle are simultaneously moved along the horizontal axis, the first transfer shuttle transfers the insertion shaft from the loading portion to the test support portion, The second transfer shuttle transfers the insertion shaft from the inspection support portion to the marking portion, and the third transfer shuttle transfers the normal insertion shaft from the marking portion to the unloading portion or transfers the failure insertion axis to the defective discharge portion.

According to an embodiment, there is provided an information processing apparatus including an input unit for inputting inspection conditions; A display unit for displaying an eddy current inspection result of the internal inspection unit and the external inspection unit; And a control unit for controlling the internal inspection unit and the external inspection unit to be driven under the inspection condition of the input unit and controlling the transfer unit to discharge the defective insertion shaft to the defective discharge unit according to the inspection result.

The automatic insertion axis defect inspection apparatus according to the present invention automatically proceeds from loading of the insertion axis, to external inspection, internal inspection, marking and unloading. Therefore, the time required for inspecting one inserted axis can be rapidly increased from 15 to 20 seconds.

In addition, since defects are accurately inspected by the eddy-current inspection method, not by the operator's eyes, micro-cracks can be detected up to a micro-scale, thereby ensuring reliability in inspection results.

When the insertion axis obtained through these precise test results is applied to the actual EPS, it is driven stably and safety of the driver can be ensured.

Also, according to the automatic insertion axis defect inspection apparatus of the present invention, the defective insertion axis having defects as a result of inspection can be separately discharged and managed, thereby reducing the alignment time of the operator.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the entire configuration of an insertion axis defect automatic inspection apparatus according to the present invention,
FIG. 2 is a perspective view showing a configuration of a state in which a cover of an automatic insertion shaft defect inspection apparatus according to the present invention is removed; FIG.
FIG. 3 is a perspective view illustrating a configuration of a state in which the transfer portion of the insertion shaft coupling automatic inspection apparatus according to the present invention is removed;
FIG. 4 is a side view showing a side configuration of the insertion axis defect automatic inspection apparatus of FIG. 2;
5 is a plan view and a side view showing the configuration of the loading part of the automatic insertion defect inspection apparatus according to the present invention,
6 is a front view showing a configuration of a test support portion of an automatic insertion shaft defect inspection apparatus according to the present invention;
7 is a perspective view showing a configuration of a test support portion of an automatic insertion shaft defect inspection apparatus according to the present invention,
8 is a side view showing a configuration of an external inspection unit of an automatic insertion shaft defect inspection apparatus according to the present invention,
9 is a perspective view showing a configuration of a marking portion of an automatic insertion shaft defect inspection apparatus according to the present invention,
10 is a perspective view showing the configuration of the jig portion of the marking portion,
11 is a perspective view showing the configuration of a transfer unit of the automatic insertion defect inspection apparatus according to the present invention,
12 is a side sectional view showing a configuration of a defective discharge portion of an automatic insertion shaft defect inspection apparatus according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 1 is a perspective view showing the configuration of an automatic insertion inspecting apparatus 1 according to the present invention, FIG. 2 is a perspective view showing the configuration of an automatic insertion inspecting apparatus 1 excluding a cover 120, 3 is a perspective view showing the configuration of the automatic insertion inspecting apparatus 1 except for the configuration of the transferring unit 800 and FIG. 4 is a side view showing a side configuration of the automatic insertion inspecting apparatus 1 of FIG. to be.

As shown in the drawings, the automatic insertion defect inspection apparatus 1 according to the present invention includes a frame unit 100, a loading unit 200 provided at an upper portion of the frame unit 100 for loading a plurality of insertion axes W together An unloading unit 300 for discharging the insertion shaft W having undergone defect inspection and marking and a test support unit 400 for supporting the insertion shaft W supplied from the loading unit 200 during an eddy current test, An external inspection unit 500 for inspecting defects on the outer diameter surface of the insertion axis W, an internal inspection unit 600 for inspecting defects on the inner diameter surface of the insertion axis W, A marking unit 700 for marking a reference mark on the surface of the substrate W, a transfer unit 800 for automatically transferring the insertion axis W, and a defective discharge unit 800 for separately discharging the defect insertion shaft W, (900).

The automatic insertion inspecting apparatus 1 automatically performs the entire process from loading of the inserting axis W to external defect inspection, internal defect inspection, marking, discharge and unloading of defective products. As a result, the operation speed is fast and the accuracy and reliability of the inspection result can be guaranteed.

The automatic insertion inspecting apparatus 1 according to the present invention includes an input unit 10 for inputting defect inspection conditions from an operator and a display unit 10 for displaying results of an eddy current inspection of the external inspection unit 500 and the internal inspection unit 600. [ (20), and a control unit (30) for controlling the above-described respective components.

The frame unit 100 supports each configuration to operate stably. The frame portion 100 includes a base frame 110 and a cover 120 coupled to an upper portion of the base frame 110. Inside the base frame 110, a power supply line, a driving unit, and a control board for control are provided. Here, the driving unit according to the preferred embodiment of the present invention is implemented using hydraulic pressure. Accordingly, a working fluid reservoir, a fluid movement line, and a plurality of discharge valves may be provided in the base frame 110.

The cover 120 is provided on the upper part of the frame part 100 to block foreign substances from entering the respective test equipments.

The loading unit 200 loads a plurality of insertion axes W. The plurality of insertion shafts W loaded in the loading unit 200 are transferred to the test support unit 400 by the first transfer shuttle 820a of the transfer unit 800. [

4 is a plan view and a side view showing the configuration of the loading unit 200. As shown in FIG. As shown in the figure, the loading unit 200 includes a loading table 210, a plurality of loading sockets 220 arranged in the circumferential direction along the outer circumferential surface of the loading table 210, A first sensing sensor 230 for sensing whether the insertion shaft W is inserted into the loading socket 220 and a loading motor 240 provided at a lower portion of the loading table 210 for rotating the loading table 210, .

The loading table 210 is formed in a disc shape. The loading table 210 is rotated by receiving the rotational force of the loading motor 240. The loading table 210 is driven to rotate clockwise. The first transfer shuttle 820a sequentially loads the insertion shaft W and transfers it to the examination support part 400 in accordance with the rotation of the loading table 210. [ Here, the rotation speed of the loading table 210 is controlled by the control unit 30 by controlling the rotation speed of the loading motor 240.

The loading socket 220 has a lower portion of the insertion shaft W inserted therein. The loading sockets 220 are disposed one on top of the socket support bar 221 as shown. The loading table 210 according to the preferred embodiment of the present invention may be provided with a total of six socket supporting bars 221 and a total of twelve loading sockets 220. The operator inserts the insertion shaft W into the loading socket 220 manually.

The first sensing sensor 230 is provided at one side of the loading table 210 to sense whether the insertion shaft W exists in the loading socket 220. The control unit 30 drives the transfer unit 800 to move the insertion shaft W to the test support unit 400 according to the detection result of the first detection sensor 230. [

When the loading table 210 rotates 6 times, for example, six times in a state where the first sensing sensor 230 does not sense the insertion shaft W, the controller 30 controls the loading motor 240 Disconnect the power supply.

The unloading unit 300 unloads the normal insertion axis W without a defect, which is marked by the marking unit 700. [ The unloading unit 300 takes over the insertion shaft W from the marking unit 700 by the third transfer shuttle 820c. The insertion shaft W supported by the unloading portion 300 is manually discharged to the outside by an operator.

The unloading unit 300 includes an unloading table 310, an unloading socket 320 provided at an upper portion of the unloading table 310 to insert the insertion shaft W, And a second sensing sensor (not shown) provided on a side surface of the unloading table 310 to sense whether the insertion shaft W is present in the unloading socket 320 .

Since the configuration and operation of the unloading unit 300 are the same as those of the loading unit 200 described above, detailed description thereof will be omitted. Here, the direction of rotation of the unloading unit 300 may be set in a direction opposite to that of the loading unit 200.

The test support 400 fixes the position of the insertion axis W during the eddy current test for the insertion axis W. [ 6 and 7 are a front view and a perspective view showing the configuration of the test support part 400. As shown in FIG. The inspecting support unit 400 supports the inserting shaft W so that the inserting shaft W is stably positioned while the inspecting inspecting operation of the inserting shaft W is performed in the inspecting unit 500 and the inspecting unit 600.

The inspection support part 400 is disposed between the transfer part 800 and the internal inspection part 600. The insertion shaft W transferred from the first transfer shuttle 820a is inserted into the upper portion of the inspection support portion 400 and the insertion shaft W having been inspected is inserted into the marking portion 700 by the second transfer shuttle 820b. Lt; / RTI > The outer inspection probe 510 of the outer inspection part 500 advances to perform the outer inspection while the insertion axis W is inserted into the inspection support part 400 and the inner inspection probe 620 of the inner inspection part 600 And the internal inspection is carried out.

The inspection support part 400 includes a support plate 410, a pair of rotation fingers 430 provided under the support plate 410, a support motor 440 for generating a rotational drive force, And a third sensing sensor 460 that senses whether the insertion shaft W is inserted into the rotation finger 430. [

The support plate 410 is provided at a predetermined height from the base frame 110. A horizontal frame 413 is provided parallel to the base frame 110 and the support plate 410 is coupled from the horizontal frame 413 to the support frame 415 at a predetermined height. A swinging unit 450 and a rotation finger 430 are provided in a space between the horizontal frame 413 and the support plate 410 and a support motor 440 is provided below the horizontal frame 413. [

An insertion hole 411 through which a lower portion of the insertion shaft W is inserted is formed through the plate surface of the support plate 410. The pair of rotation fingers 430 are disposed coaxially with the insertion hole 411. [ The drive unit 450 includes a drive pulley 451 coupled to the upper portion of the support motor 440, a finger driven pulley 420 coupled to the lower portion of the pair of rotation fingers 430, a drive pulley 451, And a transmission belt 453 which is coupled to the finger driven pulley 420 and rotates.

The finger driven pulley 420 is coupled to the lower portion of the rotation finger 430. The rotary finger 430 rotates in conjunction with the rotation of the finger driven pulley 420 by the transmission belt 453. [ The insertion shaft W is fixed in a state where a lower portion is inserted into the rotation finger 430 through the insertion hole 411. Then, the insertion shaft W is rotated by the rotation of the rotation finger 430 and the vortex examination is proceeded.

The third sensing sensor 460 senses whether the insertion shaft W is being transferred to the examination support part 400 and transmits the sensing result to the control part 30. The control part 30 causes the insertion shaft W to rotate on the rotation finger 430 The external inspection unit 500 and the internal inspection unit 600 sequentially perform defect inspection. The rotation speed of the rotation finger 430 can be set by an operator through the input unit 10. [

The external inspection part 500 inspects the defect of the outer diameter surface of the insertion shaft W fixed to the test support part 400. The external inspection unit 500 is provided so as to be movable forward and backward of the base frame 110 to inspect the insertion shaft W for defects. The external inspection unit 500 may be provided between the transfer unit 800 and the inspection support unit 400 as needed.

8 is a side view showing an inspection process of the external inspection unit 500. As shown in FIG. The external inspection part 500 includes an external inspection probe 510 which contacts the outside diameter of the insertion shaft W fixed to the inspection support part 400 and inspects an induced electromagnetic defect, And an external inspection gripper 530 provided at an upper portion of the external inspection probe 510 to fix the outer diameter of the insertion axis W. [

Here, the external inspection unit 500 is selectively used according to various specifications of the insertion shaft W. That is, inspection of the external inspection unit 500 is not required for all kinds of insertion axes W, and is selectively used.

The internal inspection unit 600 inspects defects on the inner diameter surface of the insertion shaft W fixed to the test support part 400. [ The internal inspection unit 600 is inserted into the insertion shaft W as shown in FIGS. 3 and 4 to inspect the inside of the insertion shaft W for defects.

The internal inspection part 600 includes a vertical frame 610 vertically formed at a predetermined height on one side of the inspection support part 400, a vertical support part 630 vertically movable up and down on the vertical frame 610, And a pair of internal inspection probes 620 inserted into the insertion shaft W. The internal inspection probe 620 includes a pair of internal probes 620,

The inner inspection probe 620 is lowered to the measurement position inside the insertion shaft W by the lifting and supporting unit 630, then slowly ascends and inspects for cracking using induction electrons. The inner diameter inspection point of the insertion axis W can be set manually by MPG.

The elevation support portion 630 can be driven by the hydraulic pressure or the elevation motor under the control of the control portion 30. [

Here, the inspection results inspected by the eddy current inspection method in the external inspection unit 500 and the internal inspection unit 600 are displayed on the display unit 20. Then, the control unit 30 judges that the insertion axis W having a defect deviating from the reference data is defective.

The marking unit 700 marks the reference mark on the normal insertion axis W in which the defect of the inspection result of the outer inspection unit 500 and the inner inspection unit 600 is not found. Here, the reference table expression may be provided in various ways such as a product number corresponding to each insertion axis W, a test passing mark, a product standard, and the like. The reference table expression can be set by the operator through the input unit 10. [

Fig. 9 is a perspective view showing the configuration of the marking unit 700, and Fig. 10 is a perspective view showing the configuration of the jig 710 of the marking unit 700. Fig. The marking unit 700 includes a jig 710 for receiving and receiving the insertion shaft W from the second transfer shuttle 820b and a reference mark inserting reference mark on the insertion axis W fixed to the jig 710 And a marking head 720.

The jig 710 includes a jig frame 711 and a marking socket 713 which is provided perpendicularly to the jig frame 711 and to which the lower end of the insertion shaft W is fixed and a side wall 711a of the jig frame 711, And includes a marking clamp 715 for fixing both sides of the insertion shaft W and a fourth sensor 717 for detecting insertion of the insertion shaft W into the marking socket 713.

The jig frame 711 is fixed to the base frame 110. The marking socket 713 fixes the lower portion of the insertion shaft W and the marking clamp 715 fixes the outer circumferential surface of the insertion shaft W. [ Thereby, the position of the insertion shaft W is stably fixed during the marking.

The marking head 720 is provided in a direction facing the jig 710. A marking pin 721 protrudes from the front surface of the marking head 720. The marking pin 721 is fixed in front of the pin 723. The pin transfer unit 723 transfers the marking pin 721 toward the insertion axis W in the forward, backward, left, and right directions to move it to the marking position. The marking pin 721 stamps the reference mark on the surface of the insertion shaft W by pneumatic pressure.

The transfer unit 800 automatically transfers the insertion axis W to each of the structures in accordance with the inspection process. 11 is a perspective view showing the configuration of the conveyance unit 800. Fig.

As shown, the transfer unit 800 includes a horizontal axis 810 horizontally positioned in the base frame 110 and three transfer shuttles 820a, 820b, 820c A clamp 830 coupled to a lower portion of the transfer shuttles 820a, 820b and 820c to fix the insertion shaft W and a vertical lift unit 850 for moving the clamp 830 in the vertical direction And the clamp 830 includes a front and rear transfer unit 800 that moves in the forward and backward directions (direction C) toward the insertion axis W. [

The horizontal movement of the transfer shuttles 820a, 820b and 820c along the horizontal axis 810 and the transfer of the vertical movement of the vertical lift portion 850 and the transfer of the front and rear transfer parts 800 can be realized by hydraulic cylinders, Lt; / RTI > The conveying distance and the conveying speed are controlled by the control unit 30 by controlling the conveying unit 800, the vertical moving unit 850, and the conveying shuttles 820a, 820b and 820c.

The first transfer shuttle 820a reciprocates between the loading unit 200 and the test support unit 400. The second transfer shuttle 820b reciprocates between the test support part 400 and the jig part 710. The third transfer shuttle 820c reciprocates between the jig 710 and the unloading portion 300. [

The three transfer shuttles 820a, 820b and 820c are coupled in parallel to the horizontal axis 810 and are simultaneously transferred. That is, the three transfer shuttles 820a, 820b, and 820c are primarily transferred to the loading unit 200, the test support unit 400 and the jig unit 710 at the same time, and then the inspection support unit 400, the jig unit 710 ) And the unloading unit (300).

Then, each of the transfer shuttles 820a, 820b, and 820c moves up and down and back and forth at different heights and transfer distances to transfer the insertion shaft W.

The clamp 830 is opened or closed by the hydraulic pressure. Whereby the outer diameter of the insertion shaft W is fixed and transported.

Here, the third transfer shuttle 820c transfers the defective insertion shaft W, which is not marked by the marking unit 700, to the defective discharge unit 900. [ That is, the third transfer shuttle 820c transfers the normal insertion shaft W marked on the marking unit 700 to the unloading unit 300, and the defective insertion shaft W is transferred to the defective discharge unit 900 do. The transfer position of the third transfer shuttle 820c is determined by the control of the control section 30. [

The defective discharging portion 900 separates and transfers the defective insertion shaft W separately. The defective discharge portion 900 is disposed at the rear end of the unloading portion 300. 12 is a side cross-sectional view showing the internal configuration of the defective discharge portion 900. As shown in FIG.

3 and 12, the defective discharge unit 900 includes a charging port 940 through which a faulty insertion axis W is inserted, a conveyor belt 910 through which a faulty insertion axis W charged from the charging port 940 is transferred A belt drive motor 930 for driving the conveyor belt 910 and a belt frame 920 for supporting the conveyor belt 910. [

Both ends of the conveyor belt 910 are supported by a driven roller 911 and a driving roller 913. The driving roller 913 is driven by receiving driving force from the belt driving motor 930.

The operation of the automatic insertion inspecting apparatus 1 according to the present invention having such a configuration will be described with reference to FIGS. 1 to 12. FIG.

The operator loads the insertion shaft W, which is a test object to be inspected for defects, into the loading unit 200, to see if there is a crack inside. The insertion shaft W is sequentially loaded on the loading socket 220 of the loading table 210. When the insertion shaft W is loaded, the first sensing sensor 230 senses the insertion shaft W, and the loading motor 240 is driven under the control of the controller 30. [ The loading table 210 is rotated by the driving of the loading motor 240.

The transfer shuttles 820a, 820b, and 820c of the transfer unit 800 are moved together with the driving of the loading motor 240. The first transfer shuttle 820a, the second transfer shuttle 820b and the third transfer shuttle 820c are conveyed to the loading table 210, the test support 400 and the jig 710 by a horizontal axis 810, do.

The clamp 830 of the first transfer shuttle 820a fixes the insertion shaft W. [ The clamp 830 approaches the insertion shaft W in a state in which the gap is spaced by the hydraulic pressure and the gap is narrowed in a state where the insertion shaft W is inserted into the clamp 830 to support both sides of the insertion shaft W in contact.

When the first transfer shuttle 820a fixes the insertion shaft W, the controller 30 controls the first transfer shuttle, the second transfer shuttle and the third transfer shuttle 820c to move the test support 400, the jig 710 and the unloading unit 300, as shown in FIG.

The first transfer shuttle 820a inserts the insertion shaft W into the rotation finger 430 of the examination support part 400. [ When the insertion shaft W is inserted into the rotation finger 430, the third sensing sensor 460 senses the insertion shaft W and the control unit 30 drives the support motor 440. The rotation finger 430 is rotated by the driving of the support motor 440. In this state, the external inspection unit 500 and the internal inspection unit 600 sequentially check for defects according to the type of the insertion shaft W, or only the internal inspection unit 600 checks for defects.

The external inspection part 500 is arranged such that the probe transferring cylinder 520 advances toward the test support part 400 and the external inspection probe 510 is in contact with the outer diameter of the insertion shaft W as shown in FIG. At this time, the outer test gripper 530 fixes the insertion axis W, fixes the position, and maintains the concentricity. The external inspection probe 510 supplies the induced electrons to inspect the outside of the insertion axis W for defects.

When the inspection of the external inspection part 500 is completed, the elevation support part 630 of the internal inspection part 600 descends along the vertical frame 610. The inner inspection probe 620 coupled to the lower portion of the elevation support portion 630 is inserted into the insertion axis W and is moved to the inspection position and then slowly moved upward to supply the induction electrons. Then, an internal defect of the insertion axis W is inspected.

The inspection results of the external inspection unit 500 and the internal inspection unit 600 are displayed on the display unit 20 and transmitted to the control unit 30. [

The respective transfer shuttles 820a, 820b and 820c of the transfer unit 800 are moved back to the loading unit 200, the inspection support unit 400 and the jig unit 710 by the control of the control unit 30, The insertion shaft W is fixed. The first transfer shuttle 820a fixes the insertion shaft W of the loading unit 200 and the second transfer shuttle 820b fixes the insertion shaft W of the examination support unit 400. [

Each of the transfer shuttles 820a, 820b and 820c is transferred to the inspection support part 400, the marking part 700 and the unloading part 300. The inspecting support shaft 400 is conveyed to the jig 710 of the marking portion 700 by the second conveying shuttle 820b. The insertion shaft W is inserted into the marking socket 713 of the jig 710 and the marking clamp 715 fixes the upper portion of the insertion shaft W. [ The fourth sensing sensor 717 senses the insertion shaft W and the pin transferring portion 723 of the marking head 720 transfers the marking pin 721 to the insertion shaft W side. The marking pin 721 marks the reference mark on the surface of the insertion axis W. [

At this time, the defect insertion axis W in which the defect of the inspection result of the external inspection unit 500 and the internal inspection unit 600 is detected does not mark. The marking pin 721 corresponding to the defective insertion axis W is not marked by the control of the control section 30. [

The marking-completed insertion shaft W is transferred to the unloading portion 300 by the third transfer shuttle 820c. At this time, the defective insertion shaft W is transferred to the defective discharge portion 900 by the third transfer shuttle 820c. The first transfer shuttle 820a and the second transfer shuttle 820b transfer the insertion shaft W back to the inspection support part 400 and the marking part 700 simultaneously with the transfer of the third transfer shuttle 820c. In this manner, the defect inspection for the insertion axis W proceeds in succession.

As described above, the insertion axis defect automatic inspection apparatus according to the present invention automatically proceeds from loading of the insertion axis to external inspection, internal inspection, marking and unloading. Therefore, the time required for inspecting one inserted axis can be rapidly increased from 15 to 20 seconds.

In addition, since defects are accurately inspected by the eddy-current inspection method, not by the operator's eyes, micro-cracks can be detected up to a micro-scale, thereby ensuring reliability in inspection results.

When the insertion axis obtained through these precise test results is applied to the actual EPS, it is driven stably and safety of the driver can be ensured.

Also, according to the automatic insertion axis defect inspection apparatus of the present invention, the defective insertion axis having defects as a result of inspection can be separately discharged and managed, thereby reducing the alignment time of the operator.

The embodiments of the automatic insertion axis defect inspection apparatus of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. . Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

1: Automatic inspecting apparatus for inspecting an insertion axis defect 10:
20: display unit 30:
100: frame part 110: base frame
120: Cover 200: Loading part
210: loading table 220: loading socket
230: first sensing sensor 240: loading motor
300: unloading unit 310: unloading table
320: unloading socket 400: test support
410: Support plate 411: Insertion hole
420: finger follower pulley 430: rotation finger
440: Support motor 450:
460: Third sensing sensor 500: External inspection section
510: external inspection probe 520: probe transfer cylinder
530: External inspection gripper 600: Internal inspection section
610: Vertical frame 620: Internal inspection probe
630: an elevation support part 700: a marking part
710: jig 711: jig frame
713: Marking socket 715: Marking clamp
717: fourth sensing sensor 720: marking head
721: Marking pin 723: Pin transmission
800: transfer unit 810: horizontal axis
820a: first transfer shuttle 820b: second transfer shuttle
820c: Third transfer shuttle 830: Clamp
840: forward / backward transmission 850:
900: Bad discharger 910: Conveyor belt
920: Belt frame 930: Belt drive motor
940:

Claims (11)

A base frame; A loading unit rotatably provided on an upper portion of the base frame, the loading unit loading a plurality of insertion shafts; A defect inspection part provided at one side of the loading part and inspecting the insertion axis transferred from the loading part for defects by an eddy-current flaw detection method; A marking unit provided at one side of the defect inspection unit for performing marking on a normal insertion axis having no defects in the defect inspection unit; An unloading unit for discharging the normal insertion shaft after marking is completed in the marking unit; A defective discharge portion for discharging a defective insertion shaft in which a defect is found as a result of inspection by the defect inspection portion; And a transfer unit for sequentially transferring the insertion axis to the loading unit, the defect inspection unit, the marking unit, and the unloading unit, the automatic insertion inspecting apparatus comprising:
The defect inspection unit may include: a test support unit rotatably supporting the insertion shaft; An external inspection part advancing to an insertion axis supported by the examination support part and inspecting an external defect of the insertion axis; And an internal inspection part which ascends and descends with respect to the insertion axis supported by the examination support part and inserted into the insertion axis to inspect defects inside the insertion axis,
The loading unit and the unloading unit may include a table rotatably provided with respect to the base frame; A plurality of sockets vertically coupled along the outer circumferential surface of the table and inserted and supported by the insertion shaft transferred from the transfer unit; And a first sensing sensor and a second sensing sensor provided at one side of the table for sensing whether the insertion shaft is inserted into the socket,
The test support unit includes: a support plate spaced apart from the base frame by a predetermined height, the support plate having an insertion hole through which the insertion shaft is inserted; A rotation finger disposed coaxially with the insertion hole at a lower portion of the support plate and fixing a lower portion of the insertion axis; A supporting motor for generating a rotational driving force; A driving unit that transmits the driving force of the supporting motor to the rotary finger to rotate the rotary finger; And a third detection sensor provided at an upper portion of the support plate to detect whether or not the insertion shaft is inserted into the rotation finger.
delete delete delete The method according to claim 1,
The external inspection unit includes an external inspection probe for contacting and supporting the external diameter of the insertion shaft inserted in the rotation finger and performing an eddy current inspection test;
And a probe transferring cylinder movably forward and rearward at a lower portion of the transferring unit for supporting the external inspection probe.
6. The method of claim 5,
Wherein the internal inspection unit comprises: a vertical frame vertically formed in a direction opposite to the inspection support;
A vertical lifting / supporting unit vertically movable up and down in the vertical frame;
An internal test probe coupled to a lower portion of the elevation support portion and inserted into the insertion axis and performing an eddy current test;
And an elevating motor for elevating and lowering the elevating support portion up and down.
The method according to claim 6,
Wherein the marking unit comprises: a marking jig supporting the insertion shaft transferred from the inspection support unit by the transfer unit;
And a marking head for marking a reference mark on the insertion axis coupled to the marking jig,
The marking jig includes: a marking frame coupled to the base frame;
A marking socket formed vertically from a bottom surface of the marking frame to insert a lower portion of the insertion shaft;
And a marking clamp for fixing the insertion shaft to the marking frame, the marking clamp being spaced apart from the side wall of the marking frame.
8. The method of claim 7,
The marking head includes: an input unit for receiving a reference mark from a control unit;
And a marking pin for marking the reference mark on the surface of the insertion shaft by air pressure based on the reference mark input from the input unit.
9. The method according to any one of claims 1 to 8,
The transfer unit may include: a horizontal shaft horizontally formed in the base frame;
A first conveying shuttle, a second conveying shuttle, and a third conveying shuttle provided movably in the horizontal direction along the horizontal axis;
And a clamp which is provided under the first transfer shuttle, the second transfer shuttle and the third transfer shuttle and fixes the insertion shaft,
Wherein the clamp is provided so as to be movable up and down and forward and backward with respect to the transfer shuttle.
10. The method of claim 9,
The first transfer shuttle second transfer shuttle and the third transfer shuttle are simultaneously moved along the horizontal axis,
The first transfer shuttle transfers the insertion shaft from the loading section to the test support section,
The second transfer shuttle transfers the insertion shaft from the test support to the marking unit,
Wherein the third transfer shuttle transfers the normal insertion shaft from the marking unit to the unloading unit or transfers the defective insertion shaft to the defective discharge unit.
11. The method of claim 10,
An input unit for receiving inspection conditions;
A display unit for displaying an eddy current inspection result of the internal inspection unit and the external inspection unit;
And a control unit for controlling the internal inspection unit and the external inspection unit to be driven under the inspection condition of the input unit and controlling the transfer unit to discharge the defective insertion shaft to the defective discharge unit according to the inspection result, Automatic defect inspection system.

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