KR100569373B1 - Device for testing abrasion resistance of underbody coating for automobile - Google Patents

Abstract

The present invention relates to a wear resistance test apparatus for an underbody coating for automobiles, by accurately dropping a nut at a predetermined height to accurately measure and evaluate an exposure start time of a test piece coated surface, and measuring the total weight of the dropped nut up to this point. By comparing the degree of abrasion resistance, it is possible to improve the reliability of the test results, and furthermore, it is possible to efficiently test management when developing a new car, and wear resistance testing device for underbody coating material for automobiles that can focus on the development of more stable products It is about.

The present invention for realizing this is to select the drop exit of the nut by a conduit capable of height adjustment up and down, a nut receiver formed so that the nut dropped through the conduit can be accurately dropped and collected on the test piece, and a controllable opening and closing operation unit. Opening and closing control device for opening and closing, a weighing device for measuring the total weight of the dropped nut, and characterized in that it comprises a conveyor (conveyor) device to automatically transfer the dropped nut to be repeated test.

Underbody Coating, Abrasion Resistance Test Equipment, Nuts, Test Specimen

Description

Device for testing abrasion resistance of underbody coating for automobile             

1 is a view showing the wear resistance test apparatus of the underbody coating for automobiles according to the present invention,

Figure 2 is an operation showing the height adjustment operation state of the wear resistance test apparatus according to the present invention,

Figure 3a and Figure 3b is an operation diagram showing the operating state of the opening and closing operation unit of the wear resistance test apparatus of the underbody coating for automobiles according to the present invention,

Figure 4 is a view showing a wear resistance test apparatus of a conventional underbody coating for automobiles.

<Explanation of symbols for the main parts of the drawings>

10 conduit 11 injection portion

12: dropping outlet 20: nut receiving

30: height adjusting device 40: opening and closing control device

41: opening and closing operation part 42: opening and closing part

50: weighing device 60: conveyor device

61: horizontal feed part 62: vertical feed part

70: nut 80: test piece

The present invention relates to an abrasion resistance test apparatus for automotive underbody coatings, and more particularly, to accurately measure and evaluate the start point of exposure of a test piece coated surface by dropping a nut at a certain height, and measuring the total weight of the nut dropped up to this time. By comparing the degree of abrasion resistance on the basis of this, it is possible to improve the reliability of the test results, and furthermore, it is possible to efficiently test and manage the development of new cars, and thus it is possible to focus on developing more stable products. It relates to abrasion resistance test apparatus.

In general, a substance applied for the purpose of dustproofing, anticorrosion, and abrasion to the underbody and the inner surface of a car is called an underbody coating, and the underbody is the back surface of a finished vehicle, etc. ) Means the part.

The underbody coating is applied to the rear surface of the vehicle and is applied to protect the rear surface of the vehicle body from external impacts such as gravel or boulder while driving.

Therefore, the wear resistance of the underbody coating agent is very important, and if the wear resistance of the underbody coating agent is weak, it causes corrosion of the lower part of the vehicle body, and for this reason, the vibration and soundproofing effects are deteriorated. It can also cause noise.

Due to the problems described above, the wear resistance test for the underbody coating is carried out, and depending on the test results, it is an important factor in determining whether or not the amount of the coating to the underbody coating is increased or decreased.

Meanwhile, the wear resistance test for the conventional underbody coating is performed by a simple test apparatus, as shown in FIG. 4. The test apparatus will be described in detail as follows.

The abrasion tester for abrasion resistance test has an inner diameter of 20 mm and a center surface of the test piece 5 at a position of 30 mm from a lower end of a conduit 1 having a length of 2 m. have.

After mounting and fixing the test piece 5, a nut support 4 is formed in which a nut 3 falling on the lower end thereof is collected.

In particular, the funnel-shaped injection portion 2 is installed at the upper end of the conduit 1 so that the nut 3 can be easily injected and dropped through the conduit 1.

At this time, the coating film thickness of the test piece 5 and the specifications of the nut are as follows.

◇ Coating thickness of test piece: 1 type-0.8㎜ (dry coating thickness)

                           2, 3 types-0.5㎜ (dry coating thickness)

◇ Nut specification: Hex nut made of three kinds of M-4 brass of JIS B-1181

The wear resistance test method using the wear tester is to measure the total weight of the nut (3) until the coated surface of the test piece 5 is exposed by dropping the bundle of nuts (3) having a weight of 3 kg per one time, the nut For the injection of (3), the tester uses a ladder 6 or the like to climb to a height of 2 m or more, and then directly injects a bundle of nuts 3 into the injection unit 2.

Therefore, after injecting the nut 3 each time, the tester descends the ladder 6 to check the state of the test piece 5 collided with the nut 3, and again measures the weight of the nut 3 by a predetermined amount, Repeated tests shall be carried out with a bundle of nuts (3) and again with the ladder (6) up and injecting.

In the abrasion test by such a test method, there is a problem that a safety accident may occur because the tester has to move up and down the box containing the nut 3 having a certain weight in order to inject the nut 3 into the wear tester each time. have.

In addition, the biggest problem of the existing test method is that when the tester starts to expose the coated surface while injecting the bundle of nuts (3) into the inlet (2) of the conduit (1) and collides with the coated surface of the test piece (5), It is difficult to measure the exact time of exposure of the coated surface because it is not equipped with a control means to stop the fall of the nut (3). There is a problem that it is difficult to measure the exact weight of the dropped nut (3).

Therefore, the development of a test apparatus capable of accurately measuring and evaluating the start point of exposure of the test piece 5 coated surface and measuring the total weight of the nut 3 dropped up to this point and comparing the degree of wear resistance relative thereto is required.

Therefore, the present invention has been invented to solve the above problems, in the wear resistance test apparatus for freely dropping a certain amount of nut on a test piece and measuring the total weight of the nut until just before the coated surface of the test piece, the test Precise measurement of the exposure start time of the test piece coated surface due to the configuration including the opening and closing operation unit mounted on the conduit, the opening and closing control device for controlling the same, and the automatic control means such as a conveyor device for automatically conveying the nut. By accurately comparing the degree of abrasion resistance based on this, it is possible to improve the reliability of the test results, and furthermore, it is possible to efficiently test management when developing a new car, thereby underlining the development of more stable products. The purpose of the present invention is to provide a wear test apparatus for body coatings. .

Hereinafter, the features of the present invention for achieving the above object are as follows.

The wear resistance test apparatus of the underbody coating agent for automobiles according to the present invention includes a conduit 10 capable of height adjustment up and down, and a nut 70 disposed on the bottom of the conduit 10 and dropped through the conduit 10. The drop outlet 12 of the nut 70 is provided by a nut receiver 20 which is formed to be accurately dropped on the test piece 80 and collectable, and is provided at the upper inlet side of the conduit 10 so as to be controllable. ) An opening and closing control unit (40) consisting of an opening and closing portion (42) for selectively opening and closing) and the opening and closing operation portion (41) for operating the opening and closing portion 42, and a nut installed on the discharge side of the nut (70) and dropped Weighing device 50 for measuring the total weight of the 70, and horizontal transfer unit horizontally installed at a predetermined length at the bottom of the nut receiving 20 in order to automatically transfer the dropped nut 70 to be repeated test ( 61) and vertically extending from the discharge side thereof to the height of the injection section 11 It is characterized in that it is configured to include a conveyor device 60 consisting of a vertical transfer part (62).

In addition, the conduit 10 is characterized in that the height adjustment device 30 is installed in the gear structure of the conventional rack and pinion so as to slide up and down.

On the other hand, the opening and closing operation part 41 is a piston part 411 in the cylinder 410 which is operated by an electrical signal, a rod part 412 interlocked by the piston part 411, and the rod part 412 It is characterized by consisting of a return spring 413 wound around the outer diameter of the) to return the rod 412.

The opening and closing portion 42 is formed on both sides of the conduit 10 is formed in a bent form consisting of a portion inclined downward toward the center of the conduit 10 and parallel to the wall surface of the conduit 10, opening and closing operation When the operation of the part 41 is released, the torsion spring 421 is provided to keep the drop exit 12 in a closed state.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

1 is a view showing the wear resistance test apparatus of the underbody coating agent for automobiles according to the present invention, Figure 2 is an operation diagram showing the height adjustment operation state of the wear resistance test apparatus according to the present invention, Figures 3a and 3b Of the wear resistance test apparatus of the underbody coating for automobiles according to the present invention, it is an operation diagram showing the operating state of the opening and closing operation.

The present invention is carried out by the configuration including the automatic control means such as the opening and closing operation unit mounted on the conduit and the opening and closing control device for controlling the same and the conveyor device for automatically conveying the nut during the wear resistance test process, at a certain height The nut is dropped so that the start point of the exposed surface of the test piece can be accurately measured and evaluated, and the total weight of the dropped nut can be measured.

Here, the configuration of the present invention in more detail as follows.

First, as shown in Figure 1, the wear resistance test apparatus of the underbody coating for automobiles according to the present invention is a conduit (10) capable of height adjustment up and down, and the conduit is disposed on the bottom of the conduit (10) The nut holder 20 dropped through the 10 is accurately dropped on the test piece 80 so as to be collected and the opening and closing operation part 41 is provided at the upper inlet side of the conduit 10 and is controllable. Opening and closing control device 40 consisting of an opening and closing portion 42 for selectively opening and closing the drop exit 12 of the nut 70 and the opening and closing operation portion 41 for operating the opening and closing portion 42 by The weighing device 50 is installed on the discharge side of the 70 to measure the total weight of the dropped nut 70 and the nut tray 20 to automatically transfer the dropped nut 70 to allow repeated tests. Horizontal feed portion 61 horizontally installed at a constant length at the bottom of the) and its discharge side Is configured to seobuteo comprises a conveyor device 60 consisting of a vertical transfer part (62) which extends vertically to the height of the injection unit 11.

The conduit 10 serves to guide the falling of the nuts 70 free-falling on the test piece 80 to be tested and the length of the nut (2m in the preferred embodiment of the present invention) is maintained. The initial fall point of 70) can be easily set.

At this time, the position of the said test piece 80 is located in the center of the application surface at the position of 30 mm from the lower end of the conduit 10 like the conventional mounting position, and is fixed by the inclination of the angle of 60 degrees.

Here, the reason why the test inclination angle is set to 60 ° as described above is the most likely angle when foreign matter such as gravel or boulder collides with the underbody while driving the vehicle. This is because a 60 ° inclination angle is the most severe condition.

On the other hand, the funnel-shaped injection portion 11 is formed on the upper end of the conduit 10 to easily drop the bundle of nuts 70 through the conduit 10 to fall.

In addition, the nut nut 20 is disposed in the lower end of the conduit 10 so that the dropped nut 70 is not dizzyly distributed around the test apparatus, and the nut 70 is collected.

The nut tray 20 is formed in a box shape having a predetermined height and a predetermined cross-sectional area, and is preferably sized to sufficiently collect the nut 70 when repeatedly performing a plurality of tests. .

Here, the conduit 10, as shown in Figure 2, the height adjustment device 30 is installed to slide up and down, the height adjustment device 30 is generally a gear structure of the rack and pinion In this case, a rack is formed along the longitudinal direction of the conduit 10, and the pinion engaged with the rack is rotatably installed.

The installation portion of the pinion is not limited, and may be installed in any portion as long as the portion is installed so as to be rotatably coupled to the rack, it is preferable to use those made of known techniques.

As such, the reason for raising or lowering the conduit 10 by setting the height adjustment device 30 to a predetermined height is that the nut 70 collides with the test piece 80 by changing the test conditions in the wear resistance test. This is because the impact force of is also different according to the various test results for the point of exposure of the coated surface of the test piece 80 can be derived.

At this time, when the height of the conduit 10 rises above a certain height and the gap between the lower end of the conduit 10 and the test piece 80 is opened, a collision point of the test piece 80 in which the falling nut 70 collides with each other. Since this is likely to be distributed, it is appropriate to allow it to continue to collide at the specified collision location.

On the other hand, the opening and closing control device 40 is installed at the upper inlet side of the conduit 10, when a certain amount of nuts 70 are collected in the injection portion 11, the tester opens the opening and closing control device 40, the nut 70 ) Free fall of the), while visually observing the time when the coated surface of the test piece 80 is exposed, the opening and closing control device 40 is blocked at the start of the exposure to prevent the nut 70 from falling further It is driven by a commonly used power source and is intended to be operated by an electrical switch signal.

As shown in Figure 3a and Figure 3b, looking at the configuration of the opening and closing control device 40, first the hinged to the inner diameter of the conduit 10 by the operation of the opening and closing operation unit 41 to be described later the conduit (10) The opening and closing part 42 which opens and closes the fall exit 12 of () is formed.

The opening and closing portion 42 is disposed on both sides of the conduit 10 to open and close the drop exit 12 of the conduit 10, the portion of the conduit 10 and the inclined downward toward the center of the conduit 10 Consists of a bent form consisting of a parallel portion with the wall surface, the opening and closing portion 42 of both sides are connected to each other by a connecting means, if one side is to operate the other side is also linked together.

On the other hand, the hinge coupling portion of the opening and closing portion is provided with a torsion spring 421, when the operation of the opening and closing operation portion 41 is released by the torsion spring 421, the opening portion 42, that is, the hinge 420 It can be maintained around the drop exit 12 by rotating around the center.

On the other hand, the opening and closing operation portion 41 for operating the opening and closing portion 42 is to be driven by an electrical signal is applied by the switch operation of the tester.

Here, the opening and closing operation unit 41 will be described.

The opening and closing operation part 41 is connected to the piston part 411 in the cylinder 410 operated by an electrical signal, the rod part 412 interlocked by the piston part 411, and the rod part 412. The return spring 413 is wound around the outer diameter to return the rod 412 when the piston 411 is released by the electric signal.

On the other hand, at the time when the coated surface of the test piece 80 is exposed by the collision of the nut 70, the opening and closing control device 40 is operated so that the nut 70 no longer falls and the nut receiving 20 The total weight of the collected nut 70 is measured by the weighing device 50.

On the other hand, when a predetermined measurement is measured a predetermined number of times, the outlet portion is formed in the lower end of the nut receiving 20 so that the nuts 70 collected in the nut receiving 20 is discharged through the discharge opening of the conduit 10 In order to be transferred to the injection part 11, the nuts 70 are conveyed horizontally and vertically by the conveyor device 60 to the injection part 11.

At this time, after weighing the nut 70 in the weighing device 50, the method of transporting the nut 70 to the conveyor device 60 is a manual switching device (not shown) on the side of the weighing device 50 It is preferable to use a method of transporting the nut 70 to the conveyor device 60 by manual operation through the opening and closing device having a weight measurement.

Here, the conveyor device 60 is composed of a horizontal conveying portion 61 and the vertical conveying portion 62, it is preferable to use a known technique in general, the present invention is a roller that is operated by a motor at both ends ( 610 and a belt 611 connecting the roller 610, the vertical conveying portion 62 is provided with a conveying member 620 to convey the nut (70) at the time of lifting.

Hereinafter, the wear test process using the wear resistance test apparatus of the underbody coating for automobiles according to the present invention will be described.

First, when the tester loads a certain amount of nut 70 to be dropped on the conveyor device 60, the horizontal feeder 61 is installed horizontally at a predetermined length at the bottom of the nut holder 20, and is injected from the discharge side thereof. The nut 70 is conveyed to the injection section 11 of the conduit 10 by a vertical conveying section 62 extending vertically up to the height of the section 11.

Next, the user operates the opening / closing control device 40 to drive the piston part 411 of the opening and closing operation part 41 by general pneumatic or hydraulic pressure by the electric signal, and subsequently the rod part 412 opens and closes the part 42. By sliding), the drop exit 12 is opened by rotating about the hinge 420.

Thereafter, the nuts 70 fall freely through the open drop exit 12 and collide with the coating surface of the test piece 80.

At this time, the test is repeatedly performed until the coating film surface of the test piece 80 is exposed, and when the coating film surface is exposed at any point, the tester operates the opening and closing control device 40 to close the drop exit 12. do.

Subsequently, the tester measures the total weight of the nut 70 collected by dropping the nut holder 20 through the weighing device 50.

As a result of this test, since the exposure time of the coating film surface by the fall of the nut 70 can be measured by g unit, the relative comparison of abrasion resistance can be made more accurate.

Therefore, by using the test apparatus of the present invention, it is possible to automate the process of transporting the nut 70 to the injection unit 11, and furthermore, it is possible to perform repeated tests, and to increase the accuracy of the test results. Invented a wear resistance test apparatus of the underbody coating for automobiles to improve the reliability for.

As described above, the wear resistance test apparatus of the underbody coating agent according to the present invention can prevent in advance a safety accident that may occur as the tester climbs up to the injection portion of the test apparatus, and can accurately measure and evaluate the point of exposure of the coated surface. As a result, the reliability of the test results can be promoted, and as a result, efficient test management is possible when developing a new car, which has the effect of focusing on the development of more stable products.

Claims (5)

Conduit 10 capable of height adjustment up and down, and nut nut disposed in the bottom of the conduit 10 dropping through the conduit 10 can be accurately dropped and collected on the test piece 80 ( 20 and an opening / closing portion 42 for selectively opening and closing the dropping outlet 12 of the nut 70 by a controllable opening / closing operation portion 41 provided at the upper inlet side of the conduit 10 and the opening / closing portion 42 Opening and closing control device 40 consisting of the opening and closing operation unit 41 for operating the), the weighing device 50 is installed on the discharge side of the nut 70 to measure the total weight of the nut 70 dropped and In order to automatically transfer the dropped nut 70 to allow repeated testing, the height of the injection portion 11 from the discharge side of the horizontal feed portion 61 and horizontally installed at a predetermined length at the bottom of the nut receiver 20 Including a conveyor device 60 consisting of a vertical conveying portion 62 extending vertically to Abrasion resistance test device for underbody coatings for automobiles, characterized in that formed. According to claim 1, wherein the conduit (10) wear resistance test apparatus for underbody coatings for cars, characterized in that the funnel-shaped injection portion (11) is formed on the upper end. The wear test of the underbody coating for automobiles according to claim 1 or 2, wherein the conduit (10) is provided with a height adjusting device (30) which is a gear structure of a conventional rack and pinion so as to slide up and down. Device. The method of claim 1, wherein the opening and closing operation portion 41 is a piston portion 411 in the cylinder 410 that is operated by an electrical signal, a rod portion 412 interlocked by the piston portion 411, and A wear resistance test apparatus for an underbody coating for automobiles, characterized in that it is made of a return spring 413 wound around the outer diameter of the rod portion 412 to return the rod portion 412. The method of claim 1, wherein the opening and closing portion 42 is arranged in both sides of the conduit (10) is bent form consisting of a portion inclined downward toward the center of the conduit (10) and parallel to the wall surface of the conduit (10). It consists of, the wear resistance test device of the underbody coating for automobiles, characterized in that the torsion spring 421 is provided to keep the drop exit 12 closed when the operation of the opening and closing operation unit 41 is released .

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