JP2647784B2 - Chemical conversion treatment test apparatus for metal plate test piece and its operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical conversion test apparatus for a metal sheet test piece for testing the chemical conversion property of a sheet metal product such as a cold-rolled steel sheet, and a method of operating the same. In many cases, the present invention relates to a chemical conversion test apparatus and a method of operating the chemical conversion processing apparatus, which can quickly switch a processing solution.

[0002]

2. Description of the Related Art In general, various chemical conversion treatments are performed on high-grade steel plates such as the outer plates of passenger cars at the time of surface treatment such as plating and painting. Prior to the chemical conversion treatment, the surface of the steel sheet is first degreased, washed with water, and adjusted for the surface. Therefore, the test apparatus for testing the chemical conversion property also includes a series of processing equipment for processing the test piece in the order of degreasing, washing, surface conditioning, and chemical conversion treatment.

[0003] In recent years, the types of chemical conversion treatments are also diversified depending on the use of the steel sheet. When the test conditions are also changed in a test apparatus, it is necessary to quickly change the chemical conversion treatment solution to cope with the next test. Usually, only one type of liquid can be held in the liquid tank in the test equipment. Therefore, a new chemical conversion treatment liquid and degreasing liquid are prepared and replaced each time, and the remaining liquid in the liquid tank is collected in a drum can. It required a huge amount of manpower and a long time, and improvements were desired.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems and realizes a chemical conversion test apparatus capable of rapidly changing processing liquids and efficiently coping with various kinds of processing liquid changes. With the goal.

[0005]

SUMMARY OF THE INVENTION A chemical conversion test apparatus for a metal plate test piece according to the present invention is a chemical conversion test apparatus for testing the chemical conversion property of a metal plate test piece, in which all types of treatment liquids used are separated. A storage tank held in the vicinity of this chemical conversion test apparatus is installed in parallel, a processing liquid supply pipe from each storage tank to the processing tank of the test apparatus main body is independently provided, and the storage tank from the processing tank to the storage tank is provided. A portion of the return pipe shared by all types of processing liquids is provided with water injection and drainage means for internal cleaning.

Further, in the method of operating the chemical conversion treatment test apparatus for a metal plate test piece according to the present invention, the pump and valve interposed in the reciprocating pipe route between each storage tank and the processing tank of the test apparatus main body are electrically operated. For each pump and valve, set an on / off pattern for each type of processing solution, and after each change in the type of processing solution, temporarily inject the water and drain the inside of the return piping that is shared by all types of processing solution. After the operation, the pumps and valves are simultaneously switched to a pattern for a new treatment liquid.

[0007]

According to the present invention, separate storage tanks are prepared by preparing a storage tank for only the type of chemical conversion treatment liquid and degreasing liquid expected to be used, and preparing all kinds of chemical conversion treatment liquid and degreasing liquid in advance. Each time it was used, it was sent to the liquid tank in the test facility by an independent pipe, and after use, it was collected in the original storage tank by a collection pipe. Some of the pipes in the recovery system must be shared regardless of the type of liquid, but mixing is avoided by washing the pipes with clean water each time it is used. With the above configuration, even if the type of the chemical conversion treatment is frequently changed, it can be promptly dealt with, the recovery efficiency of the liquid is improved, and the consumption can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a piping system diagram of this embodiment. 1 is a chemical treatment liquid storage tank (group), 2 is a degreasing liquid storage tank (group), 3 is a processing tank (group) of the test apparatus main body,
Reference numerals 4 and 5 denote loop pipes described later, and reference numeral 6 denotes a waste liquid tank.

In this example, the chemical conversion treatment liquid storage tanks are 6 tanks from 1A to 1F of different types of liquid, the degreasing liquid storage tanks are also 6 tanks from 2A to 2F, and the processing tank of the test apparatus body is a degreasing treatment. 31-35 depending on the type of treatment, such as chemical treatment and water washing
Up to five tanks are installed in parallel. Chemical conversion tank
32, 33 degreasing tanks. The liquid feed pipes from each of the chemical conversion liquid storage tanks 1A to 1F to the chemical conversion tank 32 of the test apparatus main body are independently provided as separate systems, and the same applies to the degreasing liquid. The return-side recovery system pipes are shared by the loop pipes 4 and 5 irrespective of the type of liquid.

In FIG. 1, since a plurality of tanks having the same function are installed in parallel, the description is complicated.
From FIG. 2, only the chemical conversion treatment liquid storage tank 1A, the chemical conversion treatment tank 32 of the test apparatus main body, the waste liquid tank 61, and the piping system related thereto were extracted and shown in FIG. A certain chemical conversion treatment liquid (hereinafter, tentatively referred to as liquid A) is prepared in a chemical conversion treatment liquid storage tank 1A at a predetermined concentration. The valve 81 is opened, the pump 97 is operated, and this is sent to the chemical conversion tank 32 of the test apparatus main body through the pipe 71. When the test using the liquid A is completed, the valve 82 is opened, and the liquid is allowed to spontaneously fall to the pipe 74 via a part of the loop pipe 4 via the pipes 72 and 73. The valve 83 is opened, the pressure is increased by the pump 88, and the solution A is returned to the chemical conversion treatment solution storage tank 1A and collected. If the liquid is discarded without being collected, return to the loop
, The valve 86 is opened, and sent to the waste liquid tank 61.

The loop pipe connects both ends of two pipes 41 and 42 having different heights in parallel with the respective parallel tanks. The higher pipe 41 is connected to tap water 89 through a pipe 75. And is normally shut off by the valve 84. The return pipe 73 from the chemical conversion tank 32 of the test apparatus main body is open to the lower pipe 42 of the loop pipe. Here, the pipes 73 and 77, which are recovery systems, and the pipe 42 on the lower side of the loop pipe are all at the lowest position in this pipe system. When the liquid A has been collected, close the valves 82 and 83,
After opening the valve 84 and injecting and circulating the tap water into the loop pipe, the pipe 73 is moved backward, and the waste liquid tank 61 is passed through the pipe 77.
To be discharged. Thus, the A solution in the collection system piping shared by the respective solutions can be washed, so that the A solution will not be mixed in the next time a different type of chemical treatment solution is collected. In the section from the chemical conversion tank 32 to the pipe 72, water or a cleaning liquid, or any of a new processing liquid is appropriately injected into the tank,
The liquid is discharged to the waste liquid tank 61 via the pipe 77.

The pipe 76 is for discarding the liquid in the chemical conversion treatment liquid storage tank 1A, and the valves 85 and 86 are opened to discharge the liquid to the waste liquid tank 61. FIG. 3 is a side view of the entire test apparatus of this embodiment. On the left is a chemical conversion liquid storage tank 1,
The processing tank 3 of the test apparatus main body is disposed on the right side.
In this figure, the piping system is partially omitted. A test piece transport device 9 is provided on the back surface of the processing tank 3 of the test apparatus main body. In the test piece transporting apparatus 9, a traveling rail 92 is installed obliquely above the processing tank 3 by a support column 91 in parallel with the processing tank 3, and a traveling carriage 93 having an elevating device 94 is mounted thereon.
Runs. A test piece holder 95 for holding a test piece is attached to the tip of the arm of the lifting device 94.

A test piece of a thin metal plate to be subjected to a chemical conversion test is held in this test piece holder, travels on each processing tank of the test apparatus main body in accordance with a processing procedure, stops at the tank position, and lowers the elevating device 94. Then, the test piece is immersed in the tank to perform a predetermined process, and after the process is completed, the test piece is pulled up and travels to the position of the next tank, thereby performing the predetermined chemical conversion test. An inspection deck 96 is provided between the test piece transport device 9 and the storage tank.

In this embodiment, each storage tank has a capacity of 120 liters, a waste liquid tank has a capacity of 1000 liters, each pipe has a capacity of 15 to 20 A, and a PVC pipe or a vinyl hose is used as appropriate. Each valve is an electromagnetic valve or an electric valve, and the ON / OFF pattern is set for the operation of each pump and valve during cleaning and for each type of processing liquid.
A new pattern was simultaneously switched from an operation panel (not shown).

[0015]

According to the present invention, since all the processing liquids to be used are prepared in advance and stored in the storage tank, no liquid preparation time is required at the time of switching. Further, since the switching of the pattern of the valve or the pump can be performed with one touch from the operation panel, the change of the processing liquid requires almost no manpower. Since the used processing solution is efficiently collected in the storage tank, the consumption of the processing solution is reduced. As described above, an excellent effect of improving the efficiency of the chemical conversion test and reducing the cost is obtained.

[Brief description of the drawings]

FIG. 1 is a piping system diagram of an embodiment of the present invention.

FIG. 2 is an explanatory piping system diagram in which a part of FIG. 1 is extracted.

FIG. 3 is a side view of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chemical conversion liquid storage tank 2 Degreasing liquid storage tank 3 Processing tank of test equipment main body 4, 5 Loop piping 6 Waste liquid tank 71-77 Piping 81-86 Valve 87, 88 Pump 89 Tap water 9 Test piece transfer device 91 Support 92 Traveling Rail 93 Traveling trolley 94 Lifting device 95 Specimen holder 96 Inspection deck

Claims (2)

(57) [Claims] In a chemical conversion test apparatus for testing the chemical conversion property of a metal plate test piece, storage tanks separately holding all types of processing solutions to be used are installed in parallel near the chemical conversion test apparatus. A processing liquid supply pipe is independently provided from each storage tank to the processing tank of the test apparatus main body, and a portion of the return pipe from the processing tank to the storage tank shared by all types of processing liquid is used for internal cleaning. A chemical conversion test apparatus for a metal plate test piece, provided with water injection and drainage means for the test. 2. A pump and a valve interposed in a reciprocating piping path between each storage tank and a processing tank of a test apparatus main body are of an electric type, and an on / off pattern is set for each pump and valve for each type of processing liquid. After setting, once the type of the processing liquid is changed, the inside of the return pipe, which is shared by all types of processing liquid, is washed with water and drained, and then the pumps and valves are simultaneously turned to the new processing liquid. The method according to claim 1, wherein the apparatus is switched to a pattern.