KR20060023402A - Stud bolt bolting direction sensing system - Google Patents

Abstract

The present invention relates to a part feeder, and more particularly, to a stud bolt fastening direction detecting system for efficiently detecting and supplying a fastening direction of a stud bolt.

The stud bolt fastening direction detection system of the present invention is a drop part of a part feeder for supplying stud bolts having different lengths of both threaded parts when the cylinder head and the manifold are fastened, and are attached to the drop part so that the stud bolt is moved forward and backward. A primary stopper for controlling the stopping and passing of the vehicle; An air inlet and an air outlet formed to face each other at a side of a drop portion at a height at which a non-threaded portion of the stud bolt is located when a stud bolt enters a forward direction and is stopped by the primary stopper; An air supplier for supplying air through the air inlet; A direction detecting device installed between the air inlet and the air supply and detecting a direction of the stud bolt stopped by the primary stopper through a dropping part, including a sensor installed at the lower part of the direction detecting device; A secondary stopper for controlling the stopping and passing of the stud bolt entered through the direction detecting device; A switching unit installed at an upper portion of the secondary stopper and having a moving passage of a stud bolt passing through the direction detecting device; It characterized in that it comprises a rotary power unit for rotating the switching unit 180 degrees.

Description

STUD BOLT BOLTING DIRECTION SENSING SYSTEM}

1 is a perspective view of a stud bolt;

2A is a perspective view of a part feeder;

2B is a schematic diagram showing a detection method of a conventional detection system in a part feeder;

Figure 2c is a schematic diagram of a conventional stud bolt fastening direction detection system;

3 is a perspective view of a nut runner and cylinder head for fastening the stud bolts aligned by the detection system;

4 is a perspective view showing a state in which a stud bolt is fastened to a cylinder head;

Figure 5 is a schematic diagram showing a stud bolt fastening direction detection system as an embodiment according to the present invention;

6 is a side view of the redirection device of FIG. 5;

7A is a view showing the operation of the direction detecting device of FIG. 5 when the stud bolt is driven forward;

7B is a view showing the operation of the direction detecting device of FIG. 5 when the stud bolt is driven backward; And,

8 is a flowchart of an operation sequence according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: stud bolt 2: part feeder

3: cylinder head 5: direction detection device

6: reversing device

According to the present invention, after stopping the stud bolts in the dropping part of the part feeder, the air flow amount according to the shape characteristics of the stud bolts is sensed to determine the direction of the stud bolts, and the direction of the stud bolts determined in the reverse direction is switched to supply the The present invention relates to a system for detecting the direction of stud bolt tightening and enabling the supply of stud bolts efficiently.

The cylinder head of the vehicle engine is equipped with an exhaust / intake manifold. Manifold mounting is performed by first fastening one side of a stud bolt having a threaded portion on both sides to a cylinder head, and then fixing the manifold using the other side. Mounting stud bolts on the cylinder head under mass production is usually automated.

1 is a perspective view of a stud bolt. The stud bolt 1 has a different length of the threaded portion on both sides. In FIG. 1, the lower side of the stud bolt 1 is a portion which is fastened to the cylinder head, and the upper side is a part which is fastened to the manifold, and there is a non-screw portion 13 therebetween. As shown in FIG. 1, the cylinder head fastening part 11 is shorter than the manifold fastening part 12. In the process of fastening the stud bolt 1 to the cylinder head, the supply direction of the stud bolt 1 is very important. This is because if the direction of the stud bolt 1 is reversely fastened, a difference in the press-in depth of the stud bolt 1 occurs, and thus the nut cannot be fastened when the manifold is mounted.

For this reason, when supplying the stud bolt 1 from the part feeder, the supply direction of the bolt 1 is first detected so that the bolt 1 is supplied in the correct direction.

Figure 2a is a perspective view showing a part feeder, Figure 2b is a schematic diagram showing a detection method of a conventional detection system in the part feeder, Figure 2c is a schematic diagram of a conventional stud bolt fastening direction detection system. The part feeder 2 includes a storage unit 20 for storing the stud bolt 1, a moving unit 21 of the bolt 1, a sensor unit 22 for detecting the direction of the bolt, and a direction of the bolt 1. The cylinder part 23 which returns the bolt 1 to the storage part 20 when there is an error, and the drop part 24 which is a passage which descends on the atmospheric disk 25 for supplying the bolt 1 to a nut runner are provided. It is provided.

The bolt 1 in the storage unit 20 moves in the direction of the dropping unit 24 along the moving unit 21. During the movement, the sensor 22 measures the thread length of the stud bolt 1 to determine whether it is in the forward direction. As a result of the determination, if the stud bolt 1 is moved in the forward direction, the stud bolt 1 proceeds as it is and is sent over the air source plate 25 through the drop portion 24.

As a result of the determination, if the stud bolt 1 is in the reverse direction, as shown in FIG. 2B, the cylinder part 23 moves in the direction of the arrow and sags downward, and the stud bolt 1 in the reverse direction is returned to the storage unit 20. Will fall.

3 is a perspective view of a nut runner and a cylinder head for fastening the stud bolts aligned by the detection system, and FIG. 4 is a perspective view showing a state in which a stud bolt is fastened to the cylinder head. The bolt 1 waiting in the forward direction plate 25 in the forward direction is supplied and fastened to the cylinder head 3 along the nut runner 26. As shown in FIG. 4, the cylinder head fastening part 11 is screwed into the screw groove of the cylinder head 3.

The problem of this conventional detection system is as follows.

First, since the detection is made when the bolt 1 is moving, the sensor 22 confirming the forward direction of the stud bolt 1 is inferior in determining the length of the forward screw of the bolt 1. However, if the direction of the stud bolt 1 is reversed due to the determination error, and the mounting is performed on the cylinder head 3, the manifold cannot be coupled and a quality problem occurs. It takes time and money to dismantle these mismatched stud bolts.

Second, when the bolt 1 is in the reverse direction, the supply of the bolt 1 may be delayed in some cases because the bolt 1 is returned back to the storage unit 20.

Therefore, the present invention is to solve the conventional problems as described above, by placing the primary stopper and the direction detection sensor to stop the movement of the stud bolt in the dropping part of the part feeder to clearly determine the direction of the stud bolt, the direction is It is an object of the present invention to provide a stud bolt fastening direction detection system that enables efficient supply of stud bolts by passing the determined stud bolts in a forward direction and then passing them.

In order to achieve the above object, the present invention is in the falling portion of the part feeder for supplying stud bolts having different lengths of both threads when the cylinder head and manifold fastening,

A direction stopper mounted on the dropping portion and having a primary stopper for controlling the stopping and passing of the stud bolt by moving forward and backward, and determining a direction of the stud bolt stopped by the primary stopper through the dropping portion;

It is installed under the direction detecting device, and has a secondary stopper for controlling the stopping and passing of the stud bolt entered through the direction detecting device, so that the stud bolts determined by the direction detecting device are passed as it is. The reversed stud bolt is provided with a redirection device for passing after the change of direction,

Ensure that the stud bolts are fed to the nut runner in the forward direction. With this configuration, it is not necessary to re-orient the bolt in the reverse direction after repositioning the bolt in the part feeder, thereby ensuring smoothness of the stud bolt supply.

In addition, the direction detecting device is an air inlet and an air outlet formed facing each other on the side of the drop portion of the height of the non-threaded portion of the stud bolt when the stud bolt enters the forward direction and is stopped by the primary stopper; An air supply for supplying air through the air inlet, and a sensor installed between the air inlet and the air supply to detect an air flow amount,

When the direction of the stud bolt is determined, the direction of the stud bolt is determined according to the amount of air flowing out through the air inlet. Since the difference in the amount of air flow is reliably shown by the presence or absence of the thread, more accurate direction determination is possible.

In addition, the direction switching device is provided with a switching unit is formed on the secondary stopper upper portion and the moving passage of the stud bolt passed through the direction detection device, and a rotating power unit for rotating the switching unit 180 degrees,

When the stud bolt determined by the direction detecting device in the forward direction enters the moving passage, the secondary stopper retreats and passes through the stud bolt. After the rotational power unit rotates the switch 180 degrees, the secondary stopper reverses to allow the stud bolt to pass through, so that the direction of the stud bolt can be changed by a simple device.

Hereinafter, an embodiment of a stud bolt fastening direction detecting system according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 5 is a schematic diagram showing a stud bolt fastening direction detection system as an embodiment according to the present invention. The dropping part 24 of the part feeder 2 is provided with a direction detecting device 5 and a direction changing device 6, and each of the dropping parts (below) of the direction detecting device 5 and the direction changing device 6 is provided at a lower portion thereof. A primary stopper 51 and a secondary stopper 61 are provided for stopping or passing the stud bolt 1 moving forward or backward in the movement path of 24). In the lower part of the secondary stopper 61, a fastening air source plate 25, which is a waiting place for supplying the bolt 1 to the nut runner, is located.

The air inlet port 55 and the air outlet port 56 are formed in the position which opposes each other in the fall part 24 side surface of the upper part of the primary stopper 51 as an installation for direction detection. An air supply 52, an air flow rate detection sensor 53, and a valve 54 are connected to the air inlet 55.

6 is a side view of the direction changer of FIG. 5. Referring to FIG. 5, the direction change device 6 is provided at the upper position of the secondary stopper 61 as the lower portion of the primary stopper 51. The direction change device 6 is provided with the switch part 62 in which the movement path 63 which the stud bolt 1 can pass is formed. The switching unit 62 is connected to the rotary power unit 64 as shown in FIG. 6 at an intermediate height corresponding to the passage length of the moving passage 63. The rotary power unit 64 is sufficient as long as it is a device capable of generating a normal rotational force.

When the stud bolt 1 is located in the moving passage 63 of the switching unit 62, the direction of the stud bolt 1 is changed when the switching unit 62 rotates 180 degrees as shown by the arrow direction shown in FIG. 5.

Figure 7a is a view showing the operation of the direction detection device of Figure 5 when the stud bolt is running in the forward direction, Figure 7b is a view showing the operation of the direction detection device of Figure 5 when the stud bolt proceeds in the reverse direction. The air inlet 55 and the air outlet 56 are formed at a height corresponding to the non-threaded portion 13 of the stud bolt 1 when the stud bolt 1 in the forward direction is stopped by the primary stopper 51. have. The air supply 52 connected to the air inlet 55 as a device for directional detection supplies air under a constant air pressure (0.3 kg / cm² in the embodiment of the present invention), and the air thus supplied is an air flow rate detection. The sensor 53 is supplied to the dropping part 24 through the air inlet 55 via the valve 54.

If the stud bolt 1 was moving in the forward direction, as shown in FIG. 7A, the flow of air is hindered by the smooth non-screwed part 13 surface of the bolt 1 and thus the flow is not smooth. The flow rate can only be reduced.

On the contrary, if the stud bolt 1 is moving in the reverse direction, as shown in FIG. 7B, the flow of air is caused by the thread shape of the manifold fastening portion 12 of the bolt 1, so that the air flow is somewhat possible. This is smooth and thus the flow of air is inevitably higher than in the forward direction.

In this way, the air flow amount that varies depending on the direction of the stud bolt 1 is detected by the air flow amount detection sensor 53. In the embodiment of the present invention, for example, if the flow rate of air is 50 cc / min or less, it is determined that the stud bolt 1 is in the forward direction, and if the flow amount of air exceeds 50 cc / min, the stud bolt 1 is determined to be in the reverse direction. Done.

Hereinafter, an operation in which the direction of the bolt 1 is determined by one embodiment of the present invention will be described.

8 is a flowchart of an operation sequence according to an embodiment of the present invention. Referring to FIG. 5, when the stud bolt 1 reaches the drop part 24 through the moving part 21 in the part feeder 2, the stud bolt 1 has a hollow cylindrical cross section due to its own weight. It falls along the inside of the fall part 24, and is stopped by the primary stopper 51 advanced to the internal movement path of the fall part 24. As shown in FIG. Then, the air is supplied from the air supply 52 and the sensor 53 detects the flow amount of air as described above to determine the direction of the stud bolt (1).

When it is determined in the forward direction, both the primary stopper 51 and the secondary stopper 61 retreat to open state, and the stud bolt 1 is a moving passage 63 formed in the switching part 62 of the direction changer 6. ) To reach the fastening atmosphere disk 25.

When it is judged to be in the reverse direction, the primary stopper 51 is opened so that the stud bolt 1 falls into the moving passage 63 formed in the switching section 62 of the direction switching device 6, but the secondary stopper 52 moves forward. As a result, the movement of the stud bolt 1 is stopped, and the stud bolt 1 is trapped in the movement passage 63. In this state, when the rotary power unit 64 of FIG. 6 generates power to rotate the switching unit 62 by 180 degrees, the stud bolt 1 is switched in the forward direction. When the secondary stopper 52 is opened, the stud bolt 1 reaches the fastening standby disk 25 in a state of being in a forward direction.

Therefore, according to the present invention, the stud bolt 1 reaches the fastening standby disc 25 in the forward direction, whether it is traveling in the reverse direction or the forward direction.

As described above, the stud bolt fastening direction detection system of the present invention enables clear directional determination and efficient bolt supply to prevent quality problems by preventing the dispensing of the stud bolts and prevents subsequent repair work following the fastening of the dissimilar products. Reduce labor input and improve productivity.                     

The present invention is not limited to the described embodiments, and various modifications and changes can be made to those skilled in the art without departing from the spirit and scope of the present invention. Such modifications or modifications may be made to the present invention. It belongs to the claims of the.

Claims (3)

In the falling part of the part feeder that supplies stud bolts with different lengths of both threaded parts when the cylinder head and the manifold are fastened, A direction stopper mounted on the dropping portion and having a primary stopper for controlling the stopping and passing of the stud bolt by moving forward and backward, and determining a direction of the stud bolt stopped by the primary stopper through the dropping portion; It is installed under the direction detecting device, and has a secondary stopper for controlling the stopping and passing of the stud bolt entered through the direction detecting device, so that the stud bolts determined by the direction detecting device are passed as it is. The reversed stud bolt is provided with a redirection device for passing after the change of direction, Stud bolt fastening direction detection system, characterized in that the stud bolt is supplied to the fastening standby disk in the forward direction. The method of claim 1, The direction detecting device includes an air inlet and an air outlet formed to face each other at a side of a dropping portion at a height at which a non-threaded portion of the stud bolt is located when the stud bolt enters the forward direction and is stopped by the primary stopper. Including an air supply for supplying air through the air, and a sensor installed between the air inlet and the air supply for detecting the air flow amount, Stud bolt fastening direction detection system, characterized in that for determining the direction of the stud bolt according to the amount of air flow discharged through the air inlet port. The method according to claim 1 or 2, The direction change device is provided on the secondary stopper and provided with a switching portion formed with a moving passage of the stud bolt passed through the direction detecting device, and a rotational power portion for rotating the switching portion 180 degrees, When the stud bolt determined by the direction detecting device in the forward direction enters the moving passage, the secondary stopper retreats and passes through the stud bolt. And the secondary power stopper moves backward through the stud bolt after the rotating power unit rotates the switch 180 degrees.

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