JPH03287342A - Positioning device for ceramics part - Google Patents

Abstract

PURPOSE:To prevent a stain and a damage and to increase the yield rate of a product by moving a ceramics part to a specific position where the detecting beam permeates through a penetration hole from a permeation sensor, and at the same time, blowing off dirt and the like attached on the surface of the permeation sensor. CONSTITUTION:When the detecting beam from a fiber sensor 7a for transmission does not reach a fiber sensor 7b for reception, a driving device 15 is started, and its torque is delivered through a timing pulley 14b, a belt 16, a timing pulley 14a, a cradle holder 13, and a part cradle 12, and a ceramics part 1 is rotated. And the axis of a permeation sensor 7 and the axis of a penetration hole 2 engraved in the ceramics part 1 are made coincident, and the permeation sensor 7 detects that the ceramics part 1 reaches a specific position. Its detecting signal stops the driving device 15 instantly, and the positioning of the ceramics part 1 is completed. Furthermore, a high pressure of air is sprayed from a blow device 9 at the time when the ceramics part 1 is transferred from the upper side of the fiber sensor 7b for reception, and dirt and the like are removed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a positioning device for ceramic parts, and in particular to a device for preventing staining and damage caused by contact between a ceramic part and a position detection member during positioning. to increase product yield,
The present invention relates to a ceramic component positioning device that can efficiently position ceramic components.

(Conventional technology) Ceramics such as silicon nitride and silicon carbide have high hardness, superior properties such as abrasion resistance, high-temperature strength, and corrosion resistance compared to conventional metal materials, and also have low density. Approximately 3g
/cnf, it has been developed for a wide range of applications and is mass-produced as a material for precision parts such as automobiles, aircraft, chemical equipment, and household electrical appliances.

Such ceramic parts are finally manufactured through many steps, such as a step of further processing the ceramic sintered body and a step of attaching attached metal parts. A large number of positioning devices are provided to align the ceramic parts at predetermined positions between each process and sequentially supply the ceramic parts to the processing equipment.

For example, a cylindrical airtight terminal made of ceramic is used in the center of the magnetron of a microwave oven. Since metal parts are joined by brazing on the end face of this airtight terminal, nickel plating or the like is applied in advance. Plating is generally carried out using a barrel method, and in order to homogenize the plating layer, a pair of through holes 2 drilled in a ceramic component 1 serving as an airtight terminal are filled with electrically conductive material, as shown in Fig. 3. The work of inserting the U-shaped pin 3 is carried out.

By inserting this U-shaped pin 3, the amount of current applied to the plating portion is made uniform, and the quality of the plating layer is ensured.

When feeding a ceramic component to an automatic insertion machine that inserts the tip of the U-shaped pin 3 into a through hole 2 drilled in this ceramic component 1, the position of the through hole 2 must be positioned in a predetermined direction in advance. It is necessary to.

As a device for continuously positioning such a cylindrical ceramic component 1 having a through hole 2 in the axial direction, a mechanism as shown in FIG. 4 has conventionally been adopted. This mechanism consists of a pin 4 made of cemented carbide or the like on the pitch circle of the through hole 2.
It is arranged and configured so as to press. Pin 4 is base 5
It is protrudingly provided at a predetermined position on the top via a pressure spring 6.

When positioning is performed, the ceramic component 1 is rotated by a rotation mechanism (not shown) with the tip of the pin 4 pressed against the pitch circle. By rotating the pin 4 to a position where the tip end thereof is inserted into the through hole 2, the ceramic component 1 is positioned at a predetermined position.

(Problem to be Solved by the Invention) However, in the conventional positioning device shown in FIG. Since the ceramic parts are inserted into the housing, the ceramic parts are often damaged or stained, and there is a drawback that the yield of the product is greatly reduced due to poor quality.

In particular, wear powder from metal pins often adheres to the surface of ceramic components and deteriorates electrical characteristics, and accumulated wear powder makes it difficult to detect the position of the through hole.

In addition, because the tip of the pin constantly slides in contact with ceramic parts, pin wear is significant and positioning errors occur frequently.As a result, the pin needs to be replaced more frequently and the operating rate of automatic assembly equipment is significantly reduced. There was a problem with the decline.

The present invention was made to solve the above-mentioned problems, and can be used without causing stains or damage during positioning operations.
It is an object of the present invention to provide a positioning device for ceramic parts that can efficiently position a large number of ceramic parts having through holes in the axial direction.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a positioning device for ceramic parts that continuously positions a ceramic part having a through hole in the axial direction at a predetermined position. A transmission sensor is provided facing each other so as to sandwich the component, a moving device moves the ceramic component to a predetermined position where the detection light from the transmission sensor passes through the through hole, and a device blows off dust etc. adhering to the surface of the transmission sensor. It is characterized by being equipped with a blowing device.

The moving device also includes a positioning pin that reciprocates along an axis corresponding to a predetermined position, and this positioning pin is inserted into a through hole of the ceramic component after it has been moved to fix the ceramic component at a predetermined position. It is recommended to configure

(Function) According to the ceramic component positioning device having the above configuration, each ceramic component is inserted between the transmission sensors arranged inwardly in the axial direction. The ceramic component is then moved by a moving device and positioned at a predetermined position until the emitted light from the transmission sensor reaches a predetermined position where it passes through the through hole.

Moreover, since the dust and the like adhering to the surface of the transmission sensor are appropriately blown away by the blowing device, there is no fear that the detection sensitivity of the transmission sensor will decrease over time.

In this way, according to the device of the present invention, the position of the through hole can be detected by a transmission sensor that does not come into contact with the ceramic components, so there is no staining or damage to the ceramic components, compared to conventional contact-type positioning devices. , high quality ceramic parts can be obtained with high yield,
It is also possible to position efficiently. Furthermore, since it does not use a pin material that slides on the surface of a ceramic component like in the past, there is no adhesion or accumulation of abrasion powder, and there is less chance of deterioration of electrical characteristics or poor position detection. Furthermore, there is no need to replace pin materials, etc., making maintenance and management of the device easier, and the operating rate of the automatic assembly device can be increased.

Moreover, by inserting a positioning pin into the through hole of the ceramic component after movement, errors in the stopping position of the moving device can be eliminated. Furthermore, by forming the positioning pin from a highly hard ceramic material, the amount of abrasion powder generated is further reduced, and together with the removal of abrasion powder by the blowing device, it is possible to prevent a decrease in the detection sensitivity of the transmission sensor. In addition, it is possible to eliminate contamination of ceramic parts due to metal powder.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of the present invention.

In other words, the ceramic component positioning device according to this embodiment is a ceramic component 1 having a through hole 2 formed in the axial direction.
Ceramic component 1 that continuously positions the
In the positioning device, the ceramic component 1 is moved to a predetermined position where the transmission sensor 7 is provided facing each other so as to sandwich the ceramic component 1 in the axial direction, and the detection light from the transmission sensor 7 is transmitted through the through hole 2. device 8;
It is configured to include a blow device 9 for blowing off dust and the like adhering to the surface of the transmission sensor.

The transmission sensor 7 includes a transmitting fiber sensor 7a that transmits detection light and a receiving fiber sensor 7b that receives the detection light.
and are arranged facing each other on the same axis. The transmitting fiber sensor 7a is attached to an upper sensor holder 10 that moves up and down with respect to the ceramic component 1, while the receiving fiber sensor 7b is attached to a mobile device r! 18 is fixed to the lower sensor holder 11 in a non-rotatable state.

Furthermore, the moving device 8 includes a cylindrical component pedestal 12 on which the ceramic component 1 is placed, a pedestal holder 13 that detachably supports the component pedestal 12 and rotates around the lower sensor holder 1, and a pedestal holder 13. a timing pulley 14a integrally formed with the timing pulley 14a, a drive device 15 for rotating the timing pulley 14a, a timing pulley 14b attached to the output shaft of the drive device 15, and a timing pulley 14a and
4b and a belt 16 stretched between them.

On the other hand, the blowing device 9 is disposed to face the receiving fiber sensor 7b on which dust and the like tend to accumulate, and the sensor surface exposed when the ceramic component 1 is removed from the pedestal holder 13 together with the component pedestal 12. The system is configured to intermittently inject high-pressure air into the air.

Further, as shown in FIG. 2, the moving device 8 includes a positioning pin 17 that moves up and down along an axis corresponding to a predetermined position targeted in a positioning operation. Made of wood,
It is fixed on a pin holder 18 that reciprocates from below to above the ceramic component 1 or vice versa.

In the embodiment shown in FIG. 1, the transmission sensor 7 is
Although only one unit of the moving device 8 is shown in the figure in a simplified manner, in an actual device, each component is combined in multiple stages depending on the number of ceramic parts to be simultaneously positioned.

Next, the action will be explained.

When the device of this embodiment is operated to position the ceramic components 1, first, the ceramic components 1 sequentially fed from the aligning device are placed one by one in the upper concave portion of the component holder 12. Next, the axis of the transmitting fiber sensor 7a is
The upper sensor holder 10 is lowered so that it coincides with the axis of the receiving fiber sensor 7b and the distance between the tip of the transmitting fiber sensor 7a and the top surface of the ceramic component 1 is about 1 mm. If the detection light from the transmitting fiber sensor 7a has not reached the receiving fiber sensor 7b at that point, that is, if it is detected that the ceramic component 1 is not in the predetermined position, the drive device 15 is activated and its rotation is detected. The force is applied to the timing pulley 14b1 belt 16,
The timing is transmitted via the timing pulley 14a1, pedestal holder 13, and component pedestal 12, and the ceramic component 1 rotates.

Then, the axial center of the transmission sensor 7 and the axial center of the through hole 2 bored in the ceramic component 1 coincide, and the ceramic component 1
The transmission sensor 7 detects that the has reached a predetermined position. The detection signal causes the drive device 15 to suddenly stop, and the positioning of the ceramic component 1 is completed.

Note that by equipping the drive device 14 with a general-purpose control brake peck (not shown), the accuracy of stopping the rotation of the ceramic component 1 can be suppressed to about ±1 degree in rotation angle.

By the way, if the detection sensitivity is reduced due to sensitivity adjustment of the transmission sensor 7 that detects a predetermined position, or if the stop response of the drive device 15 is delayed, the stopping position of the ceramic component rotationally moved by the moving device 8 may be changed to the predetermined position. There may be a slight deviation from the

In order to eliminate the misalignment, a positioning pin 17 protruding from the axis of a predetermined position is inserted into the through hole 2 of the ceramic component 1, which has been optically positioned by the transmission sensor 7. Since the outer diameter of this positioning pin 17 is set approximately equal to the inner diameter of the through hole 2, the ceramic component 1
The axis of the through hole 2 moves slightly so as to coincide with the axis of the positioning pin 17, and is finally positioned at a predetermined position.

At this time, since the positioning pin 17 is inserted into the stopped ceramic part 1, the impact force it receives is small, and it is unlikely that the ceramic part 1 will be damaged or the positioning pin 1 itself will be worn out. Even if the positioning pin 17 made of ceramic material wears out and abrasion powder adheres to the ceramic component 1, unlike metal powder, there is no risk of damaging the electrical characteristics of the ceramic component 1.

Further, although dust and abrasion particles are likely to adhere and accumulate on the surface of the receiving fiber sensor 7b mounted upward, the ceramic component 1 is attached to the receiving fiber sensor 7 together with the component holder 12.
At the time of transfer from the upper part of b, high-pressure air is injected from the blowing device 9 to remove dust and the like. Therefore, there is less possibility that the detection sensitivity of the transmission sensor 7 will decrease and erroneous detection will occur.

In this way, according to the present embodiment, the position of the through hole 2 can be detected by the transmission sensor 7 that does not come into contact with the ceramic component 1, so compared to the conventional contact type positioning device, it is possible to prevent staining or damage to the ceramic component 1. It is possible to obtain high-quality ceramic parts 1 with a high yield without having to give a large amount of heat, and it is also possible to position them efficiently.

Furthermore, since no pin material is used that slides on the surface of the ceramic component l as in the prior art, there is no adhesion or accumulation of abrasion powder, and the rate of deterioration of electrical characteristics and position detection failure is low. Furthermore, there is no need to replace pin materials, etc., making maintenance and management of the device easier, and the operating rate of the automatic assembly device can be increased.

〔Effect of the invention〕

As explained above, according to the positioning device for ceramic parts according to the present invention, the position of the through hole can be detected by a transmission sensor that does not come into contact with the ceramic parts. It is possible to obtain high-quality ceramic parts with a high yield without causing damage or damage, and it is also possible to position them efficiently. Furthermore, since it does not use a pin material that slides on the surface of a ceramic component like in the past, there is no adhesion or accumulation of abrasion powder, and there is less chance of deterioration of electrical characteristics or poor position detection. Furthermore, there is no need to replace pin materials, etc., making maintenance and management of the device easier, and the operating rate of the automatic assembly device can be increased.

Furthermore, by inserting a positioning pin into the through hole of the ceramic component after it has been moved, it is possible to eliminate errors in the stopping position caused by response delays of the moving device. Furthermore, by forming the positioning pin from a highly hard ceramic material, the amount of abrasion powder generated is further reduced, and together with the removal of abrasion powder by the blowing device, it is possible to prevent a decrease in the detection sensitivity of the transmission sensor. In addition, it is possible to eliminate contamination of ceramic parts due to metal powder.

1... Ceramic parts, 2... Through holes, 3...
U-shaped pin, 4... Pin, 5... Base, 6... Pressing spring, 76... Transmission sensor, 7a... Fiber sensor for transmitting, 7b... Fiber sensor for receiving, 8 ...
Moving device, 9... Blow device, 10... Dobe sensor holder, 11... Lower sensor holder, 12... Component pedestal, 13... pedestal holder, 14a, 14b... Timing Pulley, 15... Drive device, 16... Belt, 17... Positioning pin, 18... Pin holder.

Claims (1)

[Claims] 1. In a ceramic component positioning device that continuously positions a ceramic component having a through hole drilled in the axial direction at a predetermined position, transparent parts are provided facing each other so as to sandwich the ceramic component from the axial direction. The present invention is characterized by comprising a sensor, a moving device that moves the ceramic component to a predetermined position where the detection light from the transmission sensor passes through the through hole, and a blowing device that blows away dust and the like adhering to the surface of the transmission sensor. Positioning device for ceramic parts. 2. The moving device is equipped with a positioning pin that reciprocates along an axis corresponding to a predetermined position, and this positioning pin is inserted into the through hole of the ceramic component after it has been moved to fix the ceramic component in the predetermined position. The positioning device for ceramic parts according to claim 1, characterized in that it is configured as follows. 3. The positioning device for ceramic parts according to claim 2, wherein the positioning pin is made of a ceramic material.