KR101008550B1 - Cylinder Head Leak Inspection Device - Google Patents

Abstract

PURPOSE: A leak test machine of a cylinder head is provided to improve productivity by automatically testing for leaks in a cylinder head. CONSTITUTION: A leak test machine of a cylinder head comprises an input conveying unit(100), a test unit(200), a route switching unit(300), and a control unit(600). The input conveying unit has a first roller driving unit and a first stopper driving unit. The test unit comprises a second roller driving unit, a second stopper driving unit, a test panel unit, a pressing air injection unit, and a pressure sensor. The route switching unit has a third roller driving unit, a third stopper driving unit, and a horizontal rotation driving unit. The control unit controls the operation of the input convey unit, the test unit, and the route switching unit.

Description

CYLINDER HEAD LEAK TEST MACHINE}

The present invention relates to an automated leak test apparatus for inspecting a leak of a cylinder head for an internal combustion engine.

Normally, cylinder heads applied to internal combustion engines such as automobiles, heavy equipment, ships, etc. are molded by casting, and in particular, since these products require airtightness to the outside, it is necessary to check the leakage of the finished products. Procedure is necessary.

Conventionally, the leakage inspection of the cylinder head has been mainly performed by manual labor. That is, all communication holes formed in the cylinder head were blocked with a plug, and pressure air was injected into one of the communication holes to detect a change in pressure in the head to check for leakage.

When the pressure drop was detected, it was judged as a leak, and the cylinder head was placed in the water tank while continuously injecting the pressure air.

However, there is a problem in that productivity is reduced in terms of working time, work force, etc., because all processes for leak test of the cylinder head are made by hand.

It is an object of the present invention to provide an automated cylinder head leak inspection apparatus for inspecting the leakage of a cylinder head for an internal combustion engine.

In order to achieve the above object, the present invention provides a cylinder head leakage inspection apparatus comprising: an injection side roller driving unit for conveying a cylinder head, and an injection side stopper for reciprocating driving to stop the conveyed cylinder head at a predetermined injection standby position. A feeding unit having a driving unit; A test side roller driver for conveying the cylinder head fed from the feed transfer unit, a test side stopper driver for reciprocating to stop the conveyed cylinder head at a predetermined working position, and a plurality of communication formed in the cylinder head A test panel unit having one or more pressure air injection plugs corresponding to the holes and a plurality of hole blocking plugs to be reciprocated to the cylinder head in the working position; and the pressure air to the cylinder head through the pressure air injection plugs. A test unit having a pressure air injection unit for injecting a pressure and a pressure sensor for detecting a pressure in the cylinder head; A path switching side roller driver for transporting the cylinder head fed from the test unit, a path switching side stopper driver for reciprocating to stop the conveyed cylinder head at a predetermined discharge standby position, and the path switching side roller A path switching unit having a horizontal rotation driving unit for driving the driving unit to reciprocally rotate the NG line and the OK line; And a control unit for controlling the operation of the feeding unit, the test unit, and the path switching unit.

Here, the control unit, when the pressure detected by the pressure sensor of the test unit does not reach a predetermined reference pressure when the cylinder head is stopped in the discharge standby position by controlling the drive of the horizontal rotary drive to switch the path The side roller driver may be rotated on the NG line.

The test unit includes a rotary tray unit in which the cylinder head is transported and supported from the feeding unit, a vertical rotary drive unit rotating the rotary tray unit at a predetermined vertical angle range, and the rotary tray unit rotated. Further comprising a vertical transfer drive for vertically conveying driving in the vertical distance range of the, the cylinder head leakage inspection device, the tank for receiving the rotary tray portion transported to the lower by the vertical transfer driving portion therein, the fluid is stored therein And a water tank having a water tank communicating with the tank via a predetermined valve, and a fluid supply pump operative to supply the fluid of the water tank to the tank.

In addition, the cylinder head leakage inspection device is provided on the NG line, the NG transfer unit having a NG side roller driving unit for conveying the cylinder head fed from the path switching unit, provided on the OK line, the path switching The apparatus may further include an OK conveying unit having an OK side roller driving unit for conveying the cylinder head fed from the unit, wherein the control unit may control the operation of the NG conveying unit and the OK conveying unit.

According to the cylinder head leak test apparatus according to the present invention described above, it is possible to achieve an improvement in productivity related to the inspection work as the leak test of the cylinder head is made by an automated device.

Cylinder head leak test apparatus according to an embodiment of the present invention, as shown in Figure 1a to 1c, the input transfer unit 100, the test unit 200, the path switching unit 300, NG transfer unit 400 ), OK conveying unit (not shown), the submerged unit 500 is configured to include a control unit 600.

The feeding unit 100 is a means for transferring the cylinder head 10 to the test unit 200, and includes a roller driving unit 110 for transferring the cylinder head 10.

2A to 2C are a plan view, a front view, and a right side view showing the feed unit 100.

The cylinder head 10 to be transported on the roller driving unit 110 is once stopped by the stopper 121 protruding in the horizontal direction toward the transport path.

The stopper 121 is reciprocated by the driving of the cylinder 122, and the cylinder 122 is controlled by the control unit 600.

The stopper 121 and the cylinder 122 form the stopper driver 120.

The cylinder head 10 conveyed by the roller driving unit 110 is stopped by the stopper driving unit 120 at a predetermined input standby position.

The control unit 600, after the test of the cylinder head 10 in the test unit 200 is completed and transferred to the path switching unit 300, the control unit 600 controls the stopper driver 120 to drive the stopper 121. By retracting the cylinder head 10 of the input standby position is moved to the test unit 200.

The test unit 200 is a means for checking the leakage of the cylinder head 10, the roller driving unit 210 for conveying the introduced cylinder head 10 and the cylinder head 10 to be transferred to a predetermined operation And a stopper driver 220 for stopping in position.

The roller driving unit 210 is configured as shown in Figs. 3a and 3b, to transfer the introduced cylinder head 10, the cylinder head 10 to be conveyed is stopped at a predetermined working position by the stopper 221 do.

The stopper 221 is reciprocally driven by the driving of the cylinder 222 of FIG. 1B, and the cylinder 222 is controlled by the control unit 600.

The stopper 221 and the cylinder 222 form the stopper driver 220.

The control unit 600 drives the stopper driver 220 when the test of the cylinder head 10 is completed in the test unit 200 and the discharge of the cylinder head 10 is completed from the path switching unit 300. By retracting the stopper 221 so that the cylinder head 10 of the working position is moved to the path switching unit 300.

In addition, the test unit 200 includes a test panel unit 230, a pressure air injection unit 240, and a pressure sensor (not shown) to check the leakage of the cylinder head 10.

The test panel unit 230 includes one or more pressure air injection plugs (231 of FIG. 1B) and a plurality of hole blocking plugs 232 on the side of the test panel 230 facing the cylinder head 10 at the work position.

The pressure air injection plug 231 is connected to a pressure air injection unit 240 of FIG. 1B for injection of pressure air.

All the pressure air injection plug 231 and the hole blocking plug 232 are provided to correspond to the plurality of communication holes (H1 ~ H4) formed in the cylinder head 10, as shown in Figure 3b and 4 Then, the drive unit of the control unit 600 moves forward to block the communication holes H1 to H4.

Subsequently, by the drive control of the pressure air injection unit 240, pressure air having a predetermined reference pressure is injected into the cylinder head 10 through the pressure air injection plug 231.

In order to detect the internal pressure of the cylinder head 10 into which the pressure air is injected, the test unit 200 is provided with a pressure sensor (not shown).

The pressure sensor may be provided on the pressure air injection plug 231 side.

When the pressure sensed by the pressure sensor does not reach the reference pressure, the control unit 600 determines that leakage occurs from the cylinder head 10.

In order to check the exact leakage position in the cylinder head 10 in which leakage occurs, the test unit 200 further includes a rotary tray unit 260, a vertical rotation driving unit 270, and a vertical transfer driving unit 280. These components can be found in FIGS. 1B, 1C, 5A, 5B and the like.

The rotary tray unit 260 is fixedly supported by loading the drive roller 210, the stopper driver 220, the test panel 230, the pressure air injection unit 240 and the like on the L-shaped tray horizontal plane do.

On the other hand, the L-shaped tray vertical surface of the rotary tray unit 260 supports one side of the cylinder head (10). Of course, the opposite side of the cylinder head 10 is pressed and supported by the plugs 231 and 232 of the test panel 230.

The vertical rotary drive unit 270 is a means for rotationally driving the rotary tray unit 260 in a predetermined vertical angle range, whereby the rotary tray unit 260 is perpendicular to the horizontal position (260 in solid line in Figure 5b) Reciprocating rotation between positions (260 in dotted line in FIG. 5B).

1B illustrates a state in which the rotary tray unit 260 is rotated forward by the vertical rotary drive unit 270.

The vertical transfer driving unit 280 vertically drives the rotary tray unit 260 rotated to the vertical position in a predetermined vertical distance range.

By driving the vertical transfer driving unit 280, the rotary tray unit 260 descends to the submerged position (260 partially indicated by a dotted line in FIG. 5B) located below the vertical position.

When it is determined that the leakage occurs in the cylinder head 10, the control unit 600 controls the vertical rotation driving unit 270 and the vertical transport driving unit 280 to lower the rotary tray 260 to the submerged position. Let's do it.

In order to submerge the cylinder head 10 loaded in the rotary tray 260 in the submerged position, the cylinder head leakage inspection apparatus according to an embodiment of the present invention further includes a submerged unit 500.

As shown in FIG. 1C and the like, the water submerging unit 500 includes a tank 510, a water tank 520, a fluid supply pump 530, and the like.

The tank 510 is provided to sufficiently accommodate the rotary tray 260 in the submerged position therein.

The water tank 520 stores a fluid, in this embodiment, water and communicates with the bottom of the tank 510 through a pipe 540.

Pipe 540 is provided so that the valve (not shown) can be installed and opened.

The fluid supply pump 530 is a means for supplying water from the tank 520 to the tank 510.

The control unit 600 operates the fluid supply pump 530 when the rotary tray 260 completes the descending to the submerged position so that the water of the water tank 520 is supplied to the tank 510.

The amount of water supplied to the tank 510 should be such that the cylinder head 10 loaded on the rotary tray 260 in the submerged position is sufficiently locked.

In the cylinder head 10 submerged in water, air leakage occurs due to the pressure air injection of the pressure air injection unit 240, and thus it is possible to confirm that air bubbles are generated at the leaked part.

Accordingly, the operator can easily check the leakage portion of the cylinder head 10.

When the check of the leakage is completed, by operating the valve provided in the pipe 540 to open the water in the tank 510 flows into the water tank (520).

When the water in the tank 510 is completely drained, it operates in the reverse order of the above operation process to return the cylinder head 10 to the working position.

As described above, the tested cylinder head 10 is transferred to the path switching unit 300 by the roller driving unit 210.

1B, 6A, and 6B, the path switching unit 300 includes a roller driver 310, a stopper driver 320, and a horizontal rotation driver 330.

Since the roller driving unit 310 and the stopper driving unit 320 are substantially the same as the corresponding components of the feeding unit 100 and the test unit 200 described above, description thereof will be omitted.

The cylinder head 10 transferred on the roller driver 310 is stopped by the stopper driver 320 at a predetermined discharge standby position.

In this embodiment, the horizontal rotary drive unit 330 is a hydraulic motor, the roller coupled to the upper portion through the upper disc 333 of the shaft 332 rotatably supported by the bearing 331 The driving unit 310 is driven to rotate.

As shown in FIG. 1A, the roller driving unit 310 reciprocates between the horizontal OK line (solid line 310) and the vertical NG line (310 dotted line) by the horizontal rotation driving unit 330.

When the cylinder head 10 is stopped at the discharge standby position, the control unit 600 retracts the stopper 321 of FIG. 6A when the leakage is not confirmed according to the determination, and the cylinder head 10 remains as it is. Ensure that it is transported to the right (ie along the OK line).

On the other hand, when the leakage is confirmed in the cylinder head 10, the control unit 600 drives the horizontal rotation drive unit 330 to rotate the roller drive 310 by 90 degrees to place on the NG line, the stopper The stopper 321 of FIG. 6A is retracted to allow the cylinder head 10 to be transported along the NG line.

As shown in FIG. 1A, an NG transfer unit 400 having a roller driver 410 is provided on the NG line, and an OK transfer unit (not shown) provided with the same roller driver (not shown) on the OK line. Not shown) is provided.

Accordingly, the cylinder head 10 which has not been checked for leakage is transferred along the OK line by the OK transfer unit, and the cylinder head 10 which has been checked for leakage is transferred along the NG line by the NG transfer unit 40). do.

The cylinder head leak test apparatus according to the embodiment of the present invention described above is only to help understanding of the present invention, and the scope of the present invention should not be understood as being limited thereto.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

1A to 1C are a plan view, a front view and a right side view of a cylinder head leak test apparatus according to an embodiment of the present invention;

2a to 2c is a plan view, a front view and a right side view showing an input transfer unit which is one component of a cylinder head leak inspection apparatus according to an embodiment of the present invention,

3A and 3B are a plan view and a rear view showing the main part of a test unit which is one component of a cylinder head leak test apparatus according to an embodiment of the present invention;

Figure 4 is a rear view showing a cylinder head which is the test target of the cylinder head leak test apparatus according to an embodiment of the present invention,

5A and 5B are front and right side views showing another main part of a test unit which is one component of a cylinder head leak test apparatus according to an embodiment of the present invention;

6A and 6B are a plan view and a front view illustrating a path switching unit that is one component of a cylinder head leak test apparatus according to an exemplary embodiment of the present invention.

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

100: feed transfer unit 110: roller driving unit

120: stopper drive unit 200: test unit

210: roller driver 220: stopper driver

230: test panel unit 231: pressure air injection plug

232: hole blocking plug 240: pressure air inlet

260: rotary tray unit 270: vertical rotation drive unit

280: vertical transfer drive unit 300: path switching unit

310: roller driving unit 320: stopper driving unit

330: horizontal rotary drive unit 400: NG transfer unit

410: roller driving unit 500: water-repellent unit

510: tank 520: water tank

530: fluid supply pump 600: control unit

Claims (4)

In the cylinder head leak test device, An input transfer unit having an input side roller driver for conveying the cylinder head and an input side stopper driver for reciprocating to stop the conveyed cylinder head at a predetermined input standby position; A test side roller driver for conveying the cylinder head fed from the feed transfer unit, a test side stopper driver for reciprocating to stop the conveyed cylinder head at a predetermined working position, and a plurality of communication formed in the cylinder head A test panel unit having one or more pressure air injection plugs corresponding to the holes and a plurality of hole blocking plugs to be reciprocated to the cylinder head in the working position; and the pressure air to the cylinder head through the pressure air injection plugs. A test unit having a pressure air injection unit for injecting a pressure and a pressure sensor for detecting a pressure in the cylinder head; A path switching side roller driver for transporting the cylinder head fed from the test unit, a path switching side stopper driver for reciprocating to stop the conveyed cylinder head at a predetermined discharge standby position, and the path switching side roller A path switching unit having a horizontal rotation driving unit for driving the driving unit to reciprocally rotate the NG line and the OK line; And And characterized in that it comprises a control unit for controlling the operation of the input transfer unit, the test unit, the path switching unit, The control unit, When the pressure sensed by the pressure sensor of the test unit does not reach a predetermined reference pressure, the horizontal turning drive part is controlled to be driven when the cylinder head stops at the discharge standby position. Cylinder head leakage inspection device, characterized in that to rotate up. delete The method of claim 1, The test unit may include a rotary tray unit in which the cylinder head is transferred and supported from the feeding unit, a vertical rotary drive unit rotating the rotary tray unit in a predetermined vertical angle range, and the rotary tray unit rotated in a predetermined vertical direction. Further comprising a vertical feed drive for vertically conveying driving in the distance range, The cylinder head leak test device, A tank accommodating the rotary tray portion transferred downward by the vertical transfer driving part, a tank in which fluid is stored to communicate with the tank via a predetermined valve, and a fluid in the tank to be supplied to the tank A cylinder head leak inspection apparatus, further comprising a submerged unit having a working fluid supply pump. The method of claim 1, The cylinder head leak inspection apparatus is provided on the NG line and provided with an NG side roller driver for conveying the cylinder head conveyed from the route switching unit, NG transfer unit provided on the OK line from the route switching unit It further comprises an OK conveying unit having an OK side roller drive unit for conveying the cylinder head to be conveyed, And the control unit controls the operation of the NG transfer unit and the OK transfer unit.

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