JPS6085362A - Magnetic powder sprayer for fluorescent magnetic powder flaw detector - Google Patents

Abstract

PURPOSE:To enable automatic and accurate spraying of a magnetic powder liquid to grinding spots by spraying it from a magnetic powder spraying nozzle provided on a flaw detector according to a computation output signal of a flaw position arithmetic memory into which a shift position signal and a grinding signal with a detector is inputted. CONSTITUTION:A grinding wheel driving motor 13 is started to rotate a rotary grinding wheel 12 and then, a drive motor 10 for a grinding truck 3 is driven to shift the grinding truck 3 in the direction of the arrow (m). The grinding wheel 12 is abutted on a flaw of a steel material 4 and it is ground by visual inspection. A grinding signal (g) from a grinding detector 8 is inputted into a flaw position arithmetic memory 9 while a pulse signal (f) from a shift position detector 7 of the grinding truck 3 is inputted into a memory 9. The memory 9 memorizes grinding spots at a memory address according to the grinding signal (g) while performing a computation on the pulse signal (f) to shift a memory address data on the grinding spots to the memory address corresponding to the direction of shifting the said truck 3.

Description

[Detailed description of the invention] A fluorescent magnetic particle flaw detection device is provided with a grinding cart, a grinding device for cleaning flaws in steel materials loaded on the cart, and installed in parallel with the grinding device. ] [A transition position detector of the grinding cart and a steel material grinding detector of the grinding device are provided, and a flaw position calculation storage device is provided for inputting the transition position signal and the grinding signal from these Z detectors, and the storage device This invention relates to a magnetic powder dispersion device, characterized in that it has means for dispersing magnetic powder liquid from a magnetic powder dispersion nozzle provided in the flaw detection device to the grinding location of the steel material based on a calculation output signal obtained by To perform a visual inspection for residual flaws in
The purpose of this method is to automatically and precisely spray magnetic powder liquid onto the grinding location.

In conventional magnetic powder spraying, the magnetic powder liquid was spread not only on the ground part of the steel material after uneven part grinding but also on the entire steel material, and the magnetic powder liquid was collected by the collection device H and used again. In addition to reducing the concentration, grinding debris generated during grinding gets mixed into the magnetic powder liquid and accumulates, which poses problems in the collection method. In addition, with the method of dispersing magnetic powder liquid only on the grinding part after grinding by visual inspection by the operator, operator misidentification and timing differences are likely to occur due to the arrangement of the fluorescent magnetic particle detector. There were defects that made it difficult to spray. Furthermore, the reflected illuminance (
In the method of automatically spraying magnetic powder liquid by detecting the brightness (brightness and darkness) and determining that the area is being ground, if a part that reflects light is formed on the steel material during the pre-grinding process, it may malfunction in determining that the area is being ground. It had a defect that made it difficult to reliably spray the magnetic powder liquid only on the grinding parts of the steel material.

The present invention has been made to address the above-mentioned deficiencies, and to explain an embodiment shown in the drawings, a rail 2 is laid on a floor surface 1 as shown in FIG. A grinding cart 3 is provided which moves by moving. The grinding cart 3 is driven by a drive motor 1
The movement in forward and reverse directions is performed by a steel cable or chain 11 driven by a motor. A grinding device 5 for uneven handling of the steel material 4 loaded on the truck 3 is disposed above or on the side of the transfer path of the truck 3. After the steel material 4 was shot blasted, it was visually inspected for the presence of cancer using a visual fluorescent magnetic particle inspection device. It is loaded. The grinding device 5 is composed of a rotary whetstone 12 and a whetstone drive motor 13, and the rotary whetstone J2 is a first
As shown in the figure, the grinding wheel rotates via a V-belt 14 at a circumferential speed that matches the diameter of the grinding wheel, and the device 5 is formed to be slidable in the vertical direction and in the direction orthogonal to the moving direction of the cart 3. A fluorescent magnetic particle flaw detection device 6 (its sliding device is not shown) magnetizes and energizes the grinding portion of the steel material 4 loaded on the grinding cart 3, and a magnetic particle dispersion nozzle 6' provided on the device 6. A method for dispersing fluorescent magnetic powder liquid 6,
By spraying the magnetic powder liquid 6 on the ground area, it is possible to visually inspect whether there are any residual scratches. As shown in FIG. 1, the spray nozzles 6 are arranged side by side in the direction of movement of the cart 3 from the center line k of the grinding wheel 12 with an interval 11 between them, and the magnetization energization position is arranged with an interval 1 between them. Then, the transition position detector 7 of the grinding cart 3 and the steel material grinding detector 8 of the grinding device 5 are installed, and the transition position signal f and the grinding signal g from these detectors 7.8 are determined manually to determine the flaw position. An arithmetic storage device 9 is provided. The transition position detector 7 is a pulse transmitter, and as shown in FIG. 1, is directly connected to the drive motor 10.
A transition position signal f, that is, a pulse signal corresponding to the forward and reverse rotation of the motor 10 is output, and the steel material grinding detector 8 detects the rotating grindstone 1.
2 contacts or grinds the steel material 4, a change occurs in the current of the drive motor J3, and the amount of change in the current is detected and a grinding signal g is output. Then, the calculation output signal h I! from the storage device 9 is calculated. This apparatus has a means for automatically spraying the fluorescent magnetic powder liquid 6 from the magnetic powder scattering nozzle 6 onto the ground portion of the steel material 4 in response to the magnetic powder spraying output signal. In addition, 15 in the figure (see Figure 4) is a power switch, 16 is a power indicator light, 17 is a fuse, 18 is a reset push button switch, when pressed, all address memory is reset, 19 is a reset indicator light. , 2o is the IN indicator light that lights up with the grinding command, 21 is the RUN indicator light that lights up with the magnetization ON command, 22i ASB indicator light is used to confirm PLG ASB 2-phase pulse, and 23-digit 0IJT indicator light is lit with automatic magnetic powder dispersion.
25 is address indicator light, 261d digital switch (2 digits)
The set value for the address display is 27. Pushing the UP switch moves the register to the UP side, and 28 moves the register to the DOUN side when pushing the Down switch.

Therefore, after starting the grindstone drive motor 13 to rotate the rotary grindstone 12, the drive motor 10 of the grinding cart 3 is driven to move the grinding cart 3 in the direction of arrow m in FIG. Then, the operator brings the grindstone 12 into contact with the uneven portion of the steel material 4 that is marked with paint or the like, and visually performs the entire grinding. Then, the grinding signal g output from the grinding detector 8 is input to the flaw position calculation storage device 9, and the pulse signal f output from the shift position detector 7 of the grinding cart 3 is also input to the storage device 9. The storage device 9 stores the location to be ground in a memory address based on the grinding signal gK, and at the same time performs calculations based on the pulse signal f, shifting the memory address data of the location to be ground to a memory address corresponding to the moving direction of the cart 3. let After finishing the +iJ+ cutting of the upper L[part and passing the magnetic powder dispersion nozzle 6, the cart 3 reaches a position li+j apart l, the magnetization ON signal -] is input to the storage device f(', +9). Then, the above-mentioned device 5 and t9 are set at a preset interval 11 Iff by the magnetization ON signal i.
ffO The memory address data for the nozzle 6' position 12 is stored in the register. Then, (after the differentiation ON command, the cart 3 moves inverted to the grinding wheel at the position of the above-mentioned interval l), and the memory address data of the grinding point is shifted by the reversal pulse signal f of the shift position detector 7, and the /1 is transferred to the above address data register and subjected to a logical operation, and the grinding point reaches the position of the nozzle 6 marked 1.
/S and 1 above are for outputting a magnetic powder liquid Iyr cloth output signal from the device 9.

Next, to explain an example in which there are four scratches LH1L2, LJ, and L4 as shown in the steel material 4 (C No. 31m(a)), the rust 4 that moves together with the truck 3 is caused by the valve switch of the transfer position detector 7. Figure 3 (by W,, J”, r
As shown in b), it is divided into intervals of 100 in the transition direction, and storage locations of the grinding points of the copper phase 4 are specified in these divisions -nn. '' When the first flaw L1 is ground, the first flaw L1 is stored in the division section 0 position by the grinding signal g and the pulse signal f, and the cart 3 moves and the second flaw L2 is removed from the grinding wheel. ]2, the first flaw L1 is shifted to the section 1 position by the pulse signal X1, and the second flaw L2 is stored at the section O position after grinding. Further, when moving to the third flaw L3, the first flaw Ll and the second flaw L2 are shifted by the pulse signals
The flaw L1 is stored in the segment 2 position, the second flaw L≧ is stored in the segment capital 1 position, and the third flaw L3 is stored in the segment O position.

Then, when the fourth flaw Lq is reversely transferred, the third flaw L3 is transferred to the segmented part-3 by the pulse signals X-], X-2 and X-3, the second flaw L2 is transferred to the segmented part-2, and the first flaw L1 is section-1
The fourth flaw Lrt is stored at the segment O position. In this way, the memory in the flaw position calculation and storage device 9 is shifted by the pulse Plf to make the grinding location correspond to the storage location.

When the above-mentioned truck 3 has finished grinding the above-mentioned scratches L1, L2゜L3, Lψ and reaches the 11th scratch position, the above-mentioned first
The memories of the second scratch LZX, the third scratch L3, and the fourth scratch are shifted and moved to the section 10, 11, 12, and J3, respectively, and the cart 3 is moved to the magnetic powder dispersion nozzle 6' position Wi FiIJ V@ When the l+ position is reached, the third scratch L4, the second scratch 7
, the magnetic powder liquid spraying output signal is outputted from the storage device 9 in the order of the first flaw L1 and the fourth flaw Lq.

Since the present invention is configured as described above, the shift position signal f of the grinding cart 3 and the grinding signal g of the grinding device 5 for uneven handling of the steel material 4 can be inputted into the false position calculation storage device 9, and the above-mentioned steel material 4
Since the flaw-ground part can be made to correspond to the transition position of the same steel material 4, when the above-mentioned grinding part reaches the position of the magnetic powder dispersing nozzle 6, the magnetic powder liquid 6'' is reliably applied to the above-mentioned grinding part from the same dispersing nozzle 6'. There is no risk of misidentifying the same grinding location, and it has the practical benefit of greatly improving reliability.
and has benefits that can contribute to the promotion of labor saving・50

[Brief explanation of the drawing]

FIG. 1 is a front view showing the arrangement of the magnetic particle scattering device in the fluorescent magnetic particle flaw detection device of the present invention, and FIG. 2 is a block diagram of the control system.
3(a), 3(b), and 3(c) are first explanations of the operation of storing and organizing the locations of grinding points on steel materials, and FIG. 4 is a perspective view showing the external shape of the flaw location calculating and storing device. J... Floor surface, 2... Front row, 3... Tat cutting cart.
・Steel material, 5. Grinding device for uneven hand work, 6. Fluorescent magnetic particle flaw detection device, 7. Transition position detector, 8. 01 material grinding detector, f. Transition position signal, g. Grinding. Signal, 9. Flaw position calculation storage device, 6. Magnetic powder dispersion nozzle, h. Calculation output signal, 6. Magnetic powder liquid. Patent applicant Nippon Steel Corporation Yamamoto Kosakusho Co., Ltd. Kobukuro Kosakusho Co., Ltd. 1) Henmi J Tochi

Claims (1)

[Claims] (+) A grinding cart 3 that moves along the 01 rows 2 laid on the floor 1 is provided, and a grinding device r1i5 for cleaning scratches on the copper material 4 loaded on the cart 3 is installed. T? In a fluorescent magnetic particle flaw detection device 6 installed in parallel with 5, a transfer position detector 7 of the grinding cart 3 and a steel grinding detector 8 of the grinding device 5 are provided.
and a transition position signal 9 from these detectors 7.8.
A flaw position calculation device 9 is provided which inputs the flaw position f and the grinding signal g, and the magnetic powder liquid 6 is applied to the steel material 4 from the magnetic powder dispersion nozzle 6 provided in the flaw detection device 6 based on the calculation output signal from the storage device 9. A magnetic powder dispersing device characterized by having a means for dispersing the powder to a grinding location.