JPH01153225A - Automatic shrinkage fitting device - Google Patents

Abstract

PURPOSE:To automate a shrinkage fitting operation and uniformalize quality by mounting a turnable intermittently rotatably on a base plate, providing a jig table rotatably on the turntable and further providing a workpiece inserting unit, heater and pressurizing unit. CONSTITUTION:A turntable 5 is mounted on a base plate 1 to be rotated intermittently and formed with a plurality of segmental jig tables 6 to provide a rotatable ring plate. First and second workpieces Wa, Wb are mounted respectively on the jig tables 6. A heater II is provided on a rotational path of jig table 6 to heat the first workpiece Wa. A workpiece inserting unit III is provided on the base plate 1 adjacent the heater II to clamp the second workpiece Wb and attach same to the first workpiece Wa. Also, a pressurizing unit IV is provided on the base plate 1 close to the workpiece inserting unit III to press the second workpiece Wb against the first workpiece Wa. Thus, the shrinkage fitting operation can be automatically performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a second shrink fit hole in a preheated first workpiece.
This invention relates to an automatic shrink fitting device that inserts and integrally molds a workpiece.

(Prior Art) Conventionally, this type of shrink fitting means has been carried out as shown in FIGS. 12 to 14.

That is, in FIGS. 12 to 14, the first workpiece a in which the shrink fit hole a1 is to be formed is heated in a high temperature heating furnace at approximately 50°C to 30°C.
The first workpiece a is heated to about 0° C. for about 1 minute, and the first workpiece a is fitted into the fitting portion C1 of the jig base plate C. After that, a rod shape is shown in the shrink fit hole al of the first workpiece a. The second workpiece b is inserted by hand, and then the first workpiece a and the second workpiece b are removed from the jig base plate C, cooled naturally, and integrally formed.

(Problems to be Solved by the Invention) However, all of the above-mentioned shrink-fitting methods require not only skill but also time and effort since the shrink-fitting work is carried out manually by the operator. However, it is difficult to obtain products of uniform quality, and there are also problems in labor saving through mass production.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to place a first workpiece and a second workpiece on a jig table, automatically perform a shrink-fitting operation, and thereby save labor. It is an object of the present invention to provide an automatic shrink-fitting device that achieves uniform quality shrink-fitting without any problems and saves labor through mass production = [Structure of the Invention] The present invention has the following effects:
A rotary table is mounted on a substrate so as to rotate intermittently, and a plurality of fan-shaped jig tables are rotatably provided on the rotary table to form ring plates. A first workpiece and a second workpiece are placed on the substrate, a heating device is installed on the rotating path of the jig table to heat the first workpiece, and a workpiece insertion device is placed on the substrate adjacent to the heating device. is installed so as to grasp the second workpiece and intubate it into the first workpiece, and a pressurizing device is installed on a board close to the workpiece insertion device so as to pressurize the second workpiece into the first workpiece. The shrink-fit hole of the first workpiece is locally heated with the heating device, and the second workpiece is gripped and inserted into the shrink-fit hole with the workpiece insertion device, and then the first workpiece is inserted into the shrink-fit hole. The second workpiece is pressurized by a pressurizing device to correct the position of the workpiece, and then taken out of the machine.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

(1) Drive mechanism I In FIGS. 1 to 5, reference numeral 1 denotes a flat base plate that is integrated with the leg body 1a, and approximately in the center of this base plate 1 is equipped with an intermittent feed mechanism. A transmission mechanism 2 is installed, and a drive motor 3 is connected to an input shaft 2a of the transmission mechanism 2 via a belt 4. Further, a rotary table 5 is mounted on the output shaft 2b of the transmission mechanism 2 so as to rotate intermittently, and as shown in FIG. A plurality of fan-shaped jig tables 6 are provided to rotate together with the rotary table 5 so as to form a ring plate. Furthermore, on this jig table 6, as shown in FIG. Each of the mounting and fixing devices 6b temporarily fixes the first workpiece Wa that is H in the shrink fit hole W1, and the jig table 6 beside the first workpiece Wa has a second workpiece wb. A fitting hole 6c in which a fitting hole 6c is fitted is bored.

Therefore, the drive mechanism I described above operates the transmission mechanism 2 via the belt 3 wound around the output shaft of the drive motor 4 by driving the drive motor 4, and further operates the transmission mechanism 2 through the belt 3 wound around the output shaft of the drive motor 4. The output shaft 2b is configured to intermittently rotate the rotary table 5.

(2) Heating device (2) In FIGS. 6 to 8, the heating device (2) is installed on the rotation path of the jig table 5 to heat the first workpiece Wa. That is, a guide rail 7 is erected vertically on the inside of the support 1b that is integral with the board 1, and a bracket 8 is attached to the support 1b above the guide rail 7. An upper cylinder device 9 such as an air cylinder, for example, is provided on the bracket 8 in an inverted manner. Further, an insulating material 10 is horizontally fixed to the output shaft 9a of the upper cylinder device 9, and a slide shoe 11 is attached to one end of the insulating material 10 so as to be in contact with the guide rail 7. ing. Further, a heating element (electrical resistor) 12 is fixed to the other end of the insulating material 10 and is made of a movable electrode as a conductive material connected to a power source, and this heating element 12 is attached to the jig table 6. Shrink fit hole W of the mounted first workpiece Wa
It is located on the rotation path of No. 1.

On the other hand, a lower cylinder device 13 of the same shape and size as the upper cylinder device 9 is vertically provided on a part of the substrate 1 directly below the upper cylinder device 9, and an output shaft 13a of this lower cylinder device 13 is provided. An insulating material 14 is horizontally fixed to the insulating material 14.

Furthermore, a slide shoe 15 is provided at one end of the insulating material 14.
is attached in contact with the guide rail 7, and a heating element (electrical resistor) 16 made of a movable electrode connected to a power source is fixed to the other end of the insulating material 14. The upper end portion 16a is loosely fitted into the shrink fit hole W1 and is adapted to contact the lower end surface of the other heating element 12 to conduct electricity.

Therefore, in the heating device (2) described above, when the shrink-fit hole W1 of the first workpiece Wa placed on the jig table 6 is moved directly above the heating element 16 formed by the movable electrode and stopped, the above-mentioned upper and lower The side cylinder devices 9.13 are actuated simultaneously and join together.

That is, as shown in FIG.
6a into the shrink fit hole W1, and at the same time, this heating element 1
6 and the lower end surfaces of other heating elements 12 are brought into contact with each other and energized. Then, by joining these reheating bodies 12 and 16,
Both of these and the first workpiece Wa are approximately 50°C to 300°C.
After heating to a temperature of about ℃ for about 1 minute, repeat the above steps again.
The lower cylinder arrangement 9.13 is actuated to separate the reheating elements 12 and 16 and return them to their original positions.

(3) Workpiece insertion device■ In Figures 3, 4, and 9, the workpiece insertion device■
is installed adjacent to the heating device (1) so as to grip the 27th workpiece wb and insert it into the first workpiece Wa.

That is, in FIG. 9, a sliding member 17 is horizontally fixed to the upper part of the support column 1c that is integral with the substrate 1.
A horizontal cylinder device 18 is horizontally attached to the support IC below the sliding member 17 by a reinforcing member 19. Further, the sliding member 17 is provided with a rod-shaped stopper 20 that is larger than the width of the support IC and protrudes laterally.
a and 20b are adapted to regulate the stroke of the sliding body 21, which will be described later. Further, a T-shaped sliding body 21 is connected to the output shaft 18a of the horizontal cylinder device 18, and this sliding body 21 is slidably placed on the sliding portion 17a of the sliding member 17. has been done. Further, at the front and rear ends of this sliding body 21, each stopper 211. 21b, each stopper 21a, 21b comes into contact with both ends 20a, 20b of the stopper 20 to restrict the stroke of the slider 21.

On the other hand, a guide rail 22 is vertically erected on the inner end vertical portion 21a of the sliding body 21, and a bracket 23 is attached to the upper end of the guide rail 22. The lifting cylinder device 24 is installed upside down. Also, this elevating cylinder equipment f! An elevating body 25 having a pair of upper and lower shoes 25a is connected to the output shaft 24a of No. 24, and an automatic chuck mechanism 26 having a three-way claw 26a is vertically disposed at the lower part of the elevating body 25. This automatic chuck mechanism 2
6, height gauges 27 of different lengths are attached to the support shaft 26.
It is attached so that it can rotate around.

Therefore, in the above-mentioned insertion device (2), when the rotary table 5 is stopped at a predetermined position by intermittent operation, the horizontal cylinder device 18 is activated and slides the sliding body 21 horizontally to the position shown by the chain line in FIG. The stopper 21a moves until it abuts one end 20a of the stopper 20, and then stops. Then, the lifting cylinder device 24 is operated in conjunction with this stopping operation, and the automatic chuck mechanism 26 integrated with the lifting body 25 is guided by each shoe 25a and lowered, thereby lowering the lower end of the height gauge 27. At the same time that the three-way jaw 26a of the automatic chuck mechanism 26 contacts the top surface of the first workpiece Wa, the second The workpiece wb is held at a predetermined position based on the height gauge 27.

When the second workpiece wb is gripped by the three-way claws 26a, the elevating cylinder device 24 moves backward, rises to the original position, and stops. Next, when the horizontal cylinder device 18 is activated, the horizontal cylinder device 18 moves the sliding body 21 back to the position shown by the solid line in FIG. Move until it matches and stop. When the elevating cylinder device 24 operates, the automatic chuck mechanism 26 integrated with the elevating body 25 is guided by each shoe 25a and lowered, so that the F end of the height gauge 27 reaches the first workpiece Wa.
At the same time, the automatic chuck mechanism 26
The second work wb of the three-way claw 26a is inserted into the shrink fit hole Wl which has been heated and engraved in advance to a predetermined position based on the height gauge 27. Then, the second workpiece wb is separated from the three-way claw 26a and at the same time '
Then, the lifting cylinder device 24 is moved back and the automatic chuck mechanism 26 is lifted up.

The second workpiece wb thus inserted into the shrink-fit hole W1 of the first workpiece Wa is transferred to the next pressurizing device (2) by the intermittent operation of the rotary table 5.

(4) Pressure device■ In FIGS. 3 and 10, the support frame 1d integrated with the substrate 1, which is close to the workpiece insertion device ■, is equipped with a pressure device ■.
is installed so as to press the second work wb onto the first work Wa.

That is, in FIG. 10, the supporting frame 1d integral with the substrate 1
A pair of upper and lower slide shoes 29 are attached to one side, and one side of each slide shoe 29 has a
A movable frame 30 is provided so as to be able to rise and fall freely with its (U moving part 30a in contact with each of the slide shoes 29).A rotary type anvil mechanism is provided at the lower part 30b of the movable frame 30. 31 rotary plate 31C is provided to be intermittently rotated by a rotary shaft 32, and this rotary shaft 32 is rotated about 180'' by an actuator 33 installed at the lower end of the movable frame 30. They are connected in such a way that they move.

Further, in the anvil mechanism 31, anvil parts 31a and 31b having different diameters are implanted on a rotary plate 31c, and the anvil parts 31a.

31b is designed to place the first workpiece Wa that has already been shrink-fitted. Note that each of the anvil portions 31a, 3
The top of 1b is replaceably attached, for example, with a Teflon material.

On the other hand, a locking rod 34 is provided at the lower part 30b of the movable frame 30.
extends horizontally into the support frame 1d through a hole 35 bored on one side of the support frame 1d, and this section II-
A coil spring 3 is installed between the rod 34 and the top of the support frame 1d.
The coil spring 36 holds the movable frame 30 in a floating state.

On the other hand, a striking cylinder device 37 is erected in an inverted state on the upper part 30c of the movable frame 30 located directly above the anvil portion 31a. The striking member 38 is configured to press down the top surface of the second workpiece wb, which has already been shrink-fitted, in cooperation with the anvil portion 31a.

Therefore, in the above-mentioned pressurizing device (2), the jig table 6 is moved to the anvil portion 31a by the intermittent operation of the rotary table 5.
' and the above-mentioned beating cylinder device 3.
7 is activated, the striking member 38 of the striking cylinder device 37 works together with the anvil portion 31a to push down the top surface of the second workpiece wb, which has already been shrink-fitted, thereby shrinking it into a predetermined position. It is designed to correct the fit position.

A stopper 39 that is integral with the support frame 1d is attached below the anvil mechanism 31, and this stopper 39 supports the weight of the anvil mechanism 31.

(5) Cooling device V In FIG. 3, a cooling fan 40° 41 is placed on the rotating path of the rotary table 5 near the pressurizing device (2) to cool the first workpiece Wa and the second workpiece wb which have been shrink-fitted. It is arranged in such a way that it is forced to cool down.

(6) Height measuring device■ In FIGS. 3, 4, and 11, one side of the machine frame 1e integrated with the substrate 1 located on the rotation path of the rotary table 5 near the cooling fan 41 For the guide rail 4
2 is vertically erected, and a bracket 43 is attached to the upper part of this machine frame 1e. Further, a measuring cylinder device 44 is installed in an inverted state on this bracket 43, and an elevating slide body 45 is connected to the output shaft 44a of the =1 measuring cylinder device 44 so that its sliding portion 45a is connected to the guide rail. 42 and is slidably connected. Furthermore, a holder 4.5b is formed at the lower part of the elevating slide body 45, and a distance sensor (optical sensor) 46 is attached to this holder 45b facing downward and also vertically. . Furthermore, a contact 47 is inserted into the lower part of the slide body 45 located directly below the distance sensor 46 so as not to fall out, and this contact 47 is placed on the jig table 6. In order to measure the amount of shrink fit (shrink fit depth) of the second work wb to the first work Wa that has been shrink fit,
The distance i! between the top surface of the contactor 47 and the distance sensor 46 that is in contact with the top surface of the second workpiece wb! It is designed to measure that fIc is within a permissible range.

On the other hand, a rotary type elevation regulating mechanism 48 is provided at the lower part of the elevation slide body 45. That is,
A disk 49 is attached to the support shaft 5 at the bottom of the elevating slide body 45.
The disc 49 is rotatably mounted on the disc 49 with lift regulating rods 51a and 51b having different lengths.

Therefore, the elevation regulating mechanism 48 selectively regulates the elevation stroke of the measurement cylinder 44.

The above-mentioned height measuring device (2) is configured such that when the first workpiece Wa on the jig table 6 and the second workpiece wb shrink-fitted thereto are transferred by the transmission mechanism 2 using the intermittent feed mechanism, the height measuring device 44 is activated. Then, the elevating slide plate 45 descends together with the elevating and lowering regulating mechanism 48. Then, the elevation regulating rod 51a of the elevation regulating mechanism 48 comes into contact with the jig table 6. At this time, the contact 47 comes into contact with the top surface of the second workpiece wb, so that the distance sensor 46 measures that the gap C between the contact 47 and the top surface is within the allowable shrink fit range. It has become.

The overall operation of the present invention will be explained below.

In FIG. 5, a first workpiece Wa and a second workpiece wb are placed on each jig table 6 in advance.

Next, by driving the drive motor 4 of the drive mechanism 1, the transmission mechanism 2 is operated via the belt 3 wound around the output shaft of the drive motor 4, and the transmission mechanism 2 is integrated with the rotary table 5. The jig table 6, which has a shape of 1, is rotated intermittently and transferred to the heating device (2).

Next, in FIGS. 6 to 8, when the shrink-fit hole W1 of the first workpiece Wa is moved directly above the heating element 16 and stopped, the upper and lower cylinder devices 9°13 are activated, and the As shown in the figure, the shrink fit hole W1 is fitted into the upper end 16H of the heating element 16, and at the same time, the lower end surfaces of this heating element 16 and other heating elements 12 are brought into contact and energized. Then, by joining these photothermal bodies 12 and 16, the area around the shrink fit hole W1 of the first workpiece Wa is heated to a high temperature. When this heating operation is completed, the upper and lower cylinder devices 9 and 13 are activated again to separate the photothermal elements 12 and 16 and return to their original positions while cutting off the current supply.

Next, in FIG. 9, when the rotary table 5 stops and rises to a predetermined position by intermittent operation, the horizontal cylinder device 1
8 is activated, and slides the sliding body 21 horizontally to the position indicated by the chain line in FIG. Then, the first arm 21a collides with one end 20a of the stopper 20 and stops, and the lifting cylinder device 24 operates in conjunction with this stopping operation, so that the automatic chuck mechanism 26 integrated with the lifting body 25 is activated. By descending guided by each shoe 25a, the upper end of the height gauge 27 abuts the top surface of the first workpiece Wa, and at the same time, the three-way jaw 26a of the automatic chuck mechanism 26 moves to the upper end shown in FIG. 2. Grip the work wb in a predetermined position.

Then, the elevating cylinder device 24 moves back, rises to the original position, and stops F. Next, when the horizontal cylinder device 18 is activated, this horizontal cylinder device 18
The sliding body 21 is moved back to the original position, and the stopper 21b is moved to the stopper 2.
0 and stops. When the elevating cylinder device 24 operates, the automatic chuck mechanism 26 is guided by each shoe 25a and descends, so that the lower end of the height gauge 27 comes into contact with the top surface of the first workpiece Wa. , the second work wb of the three-way claw 26a is inserted into the shrink fit hole Wl which has been heated and engraved in advance to a predetermined position based on the height gauge 27.

Then, the second workpiece wb is separated from the three-way claw 26a, and the lifting cylinder device 24 is moved back to pick up the automatic chuck mechanism 26.

In this way, the second workpiece is inserted into the shrink fit hole W1 of the first workpiece Wa.
The workpiece wb is inserted and transferred to the next pressurizing device (2) by the intermittent feeding operation of the rotary table 5.

3 and 10, when the jig table 6 is transferred directly above the anvil portion 31a of the pressurizing device (2), the striking cylinder device 37 is activated, so that the striking member 38 of this striking cylinder device 37 is activated. The top surface of the second work wb, which is integrated with the first work Wa, is pushed down in cooperation with the anvil portion 31a, thereby correcting the shrink fit position to a predetermined position.

Next, in FIG. 3, the first work Wa and the second work w
When the pressurizing operation with b is completed, each cooling fan 40.41
The first workpiece W a and the second workpiece wb are forcibly cooled.

Finally, in Figure 11, the first
When the workpiece Wa and the second workpiece wb are transferred to the height measuring device (2), the measuring cylinder device 44 is activated. Then, the elevating slide body 45 descends together with the elevating/lowering regulating mechanism 48.

Then, the elevation regulating rod 51a of the elevation regulating mechanism 48 comes into contact with the jig table 6, so that the contactor 47
When the second workpiece wb comes into contact with the top surface of the second workpiece wb, the distance sensor 46 measures that the gap C between the contactor 47 and the top surface is within the allowable shrink fit range.

〔Effect of the invention〕

As described above, according to the present invention, the rotary table 5 is mounted on the substrate 1 so as to rotate intermittently, and a plurality of fan-shaped jig tables 6 are mounted on the rotary table 5 to form a ring plate. A first workpiece Wa and a second workpiece wb are placed on each jig table 6, and a heating device (2) is placed on the rotation path of the jig table 6 so as to be rotatable.
The workpiece Wa is installed so as to be heated, and the workpiece inserting device ■ is placed on the substrate 1 adjacent to the heating device ′■.
A workpiece wb is gripped and installed so as to be inserted into the first workpiece Wa, and a pressure device ■ is applied to the substrate 1 close to the workpiece insertion device ■ to insert the second workpiece wb into the first workpiece Wa.
Since it is installed in such a way that pressure is applied, it is possible not only to automatically perform the shrink fit work, but also to achieve uniform quality shrink fit, as well as to save labor through mass production. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an automatic shrink fitting device according to the present invention, and FIG.
3 is a plan view of the present invention; FIG. 4 is a front view of the same; and FIG.
6 is a side view of the heating device of the present invention, FIG. 7 is an enlarged cross-sectional view of the same as above, and FIG. 8 is a section of chain circle A in FIG. 6. 9 is a side view of the insertion device of the present invention, FIG. 10 is a side view of the suppression device of the present invention, FIG. 11 is a side view of the height measuring device, and FIGS. FIG. 14 is a diagram for explaining a conventional shrink fitting means. 1... Board, 5... Rotating table, 6... Jig table, ■... Heating device, ■... Insertion device, ■...
・Pressure device, ■...Cooling fan, ■...Height measurement device. Applicant's agent Mr. Sato - Figure 3 Figure 4 Figure 8 Figure 10

Claims (1)

[Claims] 1. A rotating shaft is mounted on a substrate so as to rotate intermittently, and a plurality of fan-shaped jig tables are attached to the rotating shaft so as to be freely rotatable. A first workpiece and a second workpiece are placed on each jig table, a heating device is installed on the rotation path of the jig table so as to heat the first workpiece, and the heating device is heated. A workpiece insertion device is installed on an adjacent board so as to grip the second workpiece and insert it into the first workpiece, and a pressurizing device is installed on the board close to the workpiece insertion device to insert the second workpiece into the first workpiece. An automatic shrink fitting device characterized by being installed so as to pressurize two workpieces. 2. The automatic shrink fitting apparatus according to claim 1, wherein a cooling fan is disposed on the rotation path of each jig table. 3. The automatic shrink fitting apparatus according to claim 1 or 2, characterized in that a workpiece height measuring device is installed on the rotation path of each jig table.