JPH0435061Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The invention is aimed at using, for example, a cast hole formed when casting a cylinder head as a water hole for conducting engine cooling water. The present invention also relates to a press-fitting device for press-fitting a sealing cap into the end of the hole to close it.

(Prior Art) For example, when a cylinder head is cast, a hole for removing sand from the core, that is, a hole for casting is formed. This cast hole is used as a water hole through which engine cooling water is conducted by closing its end.
What closes the end of the hole is a sealing cap formed by press working, which is press-fitted into the cast hole by a press-fitting device.

Conventionally, a press-fit device using static pressure has been used to perform this type of press-fit operation. That is, for example, using hydraulic pressure, a large pressure is gradually applied to the sealing cap, which is a press-fitted material. The sealing cap is securely press-fitted into the cast hole, so there is no risk of water leakage. Normally, a single cylinder block has a plurality of cast holes to be closed, so the structure is such that a plurality of sealing caps can be press-fitted at the same time.

However, with this type of device, the thrust required for press-fitting is extremely large. For example, the thrust required to press fit a sealing cap of approximately 50φ is approximately 1000 mm.
Kgf or more, and if 5 pieces are press-fitted at once, it will be 5ton.
Requires a certain amount of pressure. Therefore, the press-fitting device itself becomes very large and has a special-purpose mechanical configuration, which not only takes up space but is also expensive. There is also a problem with the work, as it is necessary to sequentially transport and store the mounting body, the cylinder head, and the workpiece, the sealing cap, near the press-fitting device, and the sealing cap must be placed on the hole before press-fitting. Since you have to operate it, you have to align the sealing cap in the correct position, which is time-consuming. Furthermore, in recent years, in order to increase the amount of work, it has become possible to simultaneously process workpieces flowing through multiple lines, which cannot be processed using conventional dedicated machines. That is, there is a demand for a press-fitting device that is small, easy to use, and can handle multiple types of workpieces.

(Problems to be solved by the invention) The present invention eliminates the various problems caused by the increase in the size of the device and the simplification of the range of use, as described above, and aims to reduce the size and improve ease of use. The purpose of the present invention is to provide a press-fitting device that can be adapted to workpieces.

[Structure of the idea]

(Means for Solving the Problems) That is, the present invention has a vacuum path in the driving head, attracts and holds the workpiece at the tip of the driving head using vacuum force, and detachably attaches the driving head to the tip of the support. An air hammer drive unit provided on this support is brought into contact with the rear end of the driving head and vibrated under high pressure, and an elastic body is brought into contact with the rear end of the support and the air hammer is driven through the support. This press-fitting device is characterized in that it elastically presses the driving head.

(Function) According to such a configuration, the air hammer driving section can be driven while the work is suctioned and held on the driving head by the vacuum force, and the work can be press-fitted into the mounting hole by high-pressure vibration. Since the driving head is pressed together with the support by an elastic body, the driving head can be press-fitted to the required depth. Furthermore, the device itself can be made into a handy type, and the driving hammer can be replaced with respect to the support, making it possible to press-fit various types of workpieces.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. As shown in FIG. 1, the press-fitting device is composed of a driving head 1, a support 2, and a stroke control body 3. As shown in FIG. Driving head 1 above
The device is constructed as shown in FIG. 2 and consists of a vibrating head portion 4 and a holder portion 5. The tip of the vibrating head section 4 is a workpiece. For example, it is formed to a diameter that allows it to fit into the sealing cap S. A vacuum passage 6 is provided inside, which is a small-diameter hole that is branched into a plurality of parts at the distal end, extends along the axis toward the rear end, and opens in the circumferential surface near the rear end. . The holder portion 5 is provided with a fitting hole 7 along its axis, into which a shaft portion of the vibrating head portion 4 excluding the front and rear ends is slidably fitted.
A stepped portion 8 is provided on the circumferential surface of the fitted portion of the vibrating head portion 4, and a vibrating spring 9 is accommodated in the gap formed by this stepped portion with the inner circumferential surface of the holder portion 5. A portion of the outer circumferential surface of the holder portion 5 is tapered, and is removably fitted into the support body 2.
Reference numeral 10 denotes a gripping protrusion for gripping by a device holding mechanism such as a robot when replacing the driving head 1.

The support body 2 has a vacuum hole 11 communicating with the vacuum path 6 of the driving head 1, to which a hose extending from a vacuum source (not shown) is connected. An air hammer drive unit 12 made of a commercially available air hammer is housed approximately in the center. This is equipped with a cylinder of about 14 mm, for example, and vibrates at a rate of about 2000 times/minute. The tip thereof comes into contact with the rear end surface of the vibrating head section 4 protruding from the holder section 5. Therefore, the air hammer drive section 12
By driving the vibrating head 4, which is pressed by the vibrating spring 9,
High vibrations will occur repeatedly. The vacuum path 6 of the vibrating head 4 and the vacuum hole 11 provided in the support 2 are made to have a larger diameter so that the communication state does not change even if the vibrating head 4 vibrates. It's getting old.

The stroke control body 3 includes a support portion 13 integrally connected to the rear end portion of the support body 2, an elastic body 14 that elastically presses the support portion 13, and a stroke detector 15. The support part 13 has an air supply hole 16 along its axis.
is bored, and a hose communicating with a high-pressure air source (not shown) is connected to the end. The elastic body 14 is made of a coil spring, and the support portion 1
3, the support 2 and the driving head 1 are pressed elastically. The stroke detector 15 is equipped with a commercially available air switch, which detects when the support portion 13 moves a predetermined distance and cuts off the supply of air to the air supply hole 16. .

Therefore, in order to press fit the sealing cap S into the mounting hole a of the mounting body, for example, the cylinder head W, the vacuum source and the vacuum hole 11 are communicated with each other, and the sealing cap is inserted into the distal end surface of the vibrating head 4. Guess the S. The sealing cap S is immediately and firmly attracted to the vibrating head 4. In this state, the device itself is carried to the cylinder head W, and the sealing cap S is pressed against the end of the mounting hole a. That is, the workpiece can be supplied at a location away from the place where the driving work is performed.

Press the sealing cap S against the elastic body 14
is compressed and deformed against elastic force, and when the driving stroke reaches zero, an operating switch (not shown) is turned on. High-pressure air is supplied from an air supply source to the air hammer drive section 12 through the air supply hole 16, which produces high vibrations. High vibrations are transmitted to the vibrating head section 4 that abuts the air hammer drive section 12, and the sealing cap S, which is attracted to the vibrating head section 4, is forcibly inserted inward by the width of the vibration. Elastic body 1
4 continues to apply an elastic repulsion force to the vibrating head portion 4 via the support body 2, and high vibration continues at the position where the sealing cap S is press-fitted.
Therefore, the sealing cap S is press-fitted further into the mounting hole a. There is no need for the operator or the device holding mechanism to press down the sealing cap S by applying strong force to the device during this press-fitting operation. Moreover, since vibration is used, the reaction force is extremely small (approximately 20 kgf).
When a predetermined stroke is press-fitted, the stroke detector 15 detects this and cuts off the air supply. If the device is pulled out as it is, only the sealing cap S remains in the mounting hole a, completing the press-fitting.

In order to press-fit a sealing cap S having a diameter different from this, it is sufficient to prepare a corresponding driving head 1 and attach it to the support 2. That is,
What is necessary is to pull out the holder part 5 together with the vibrating head part 4 from the support body 2 and insert a new driving head 1 into the support body 2, thus making it possible to perform a so-called quick change.

In the above embodiment, a sealing cap is used as the workpiece S, but the present invention is not limited to this, and it goes without saying that the present invention can be applied to any press-fitted object that can be sucked by vacuum force.
Therefore, the workpiece is not limited to the cap shape as described above.

[Effect of idea]

As explained above, according to the present invention, since the press-fitting operation is performed by vibration, the reaction force is small, and the device itself can be miniaturized and can be used as a hand for a robot, for example, and the range of use is expanded. In addition, the driving head is easily replaceable, and can be easily adapted to workpieces of various shapes, and is not limited to the supply position of the workpiece, resulting in improved workability.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic longitudinal cross-sectional view of a press-fitting device, and FIG. 2 is a partially cutaway side view of the driving head, which is the main part thereof. S...Work (sealing cap), a...
Mounting hole, 6... Vacuum path, 1... Driving head, 2... Support body, 12... Air hammer drive section, 14... Elastic body.

Claims (1)

[Scope of utility model registration request] In an apparatus for press-fitting a workpiece into a mounting hole, a driving head that has a vacuum path and holds the workpiece by suction at its tip by vacuum force; a support that detachably attaches and supports the driving head to the tip of the driving head; An air hammer drive unit is provided on the support and vibrates under high pressure by contacting the rear end of the driving head to apply vibration to the driving head and press-fit the workpiece into the mounting hole. A press-fitting device comprising an elastic body that elastically presses the driving head and moves the driving head toward the back of the mounting hole as the press-fitting operation is performed.