JPS62282835A - Press fit device - Google Patents

Abstract

PURPOSE:To make suction and exhaust valve seats and so on attachable without changing a jig, by attaching the jig attaching a cylinder head on a work table of a numerically controlled machine free of turning over within the specified angle range by a turnover device. CONSTITUTION:A jig 7 itself having a turnover device is set up on a work table 6 of a numerically controlled machine 1 so as to make a difference in suction and exhaust valve angles automatically alterable. And, in order to avoid imposing some pressure on the work table itself of the N/C machine 1, there are provided with backups 10, 10' and 11. Therefore, at the time of press fit of a valve guide and a valve seat, a cylinder head is positioned and clamped to the jig 7 at both setting and takeout positions and then the jig 7 is moved to one side press fit position and clamped thereto whereby the jig 7 and the cylinder head are held by these backups 10, 10' and 11. And, the valve guide and the valve seat on one side are pressed in. Afterward, the jig 7 is moved up to a turnover position, and the valve seat and the valve guide on the other are pressed in.

Description

[Detailed description of the invention]

3. Detailed description of the invention

[Industrial application field]

The present invention is a cylinder head valve guide and valve seat press-fitting device, in which a jig for mounting the cylinder head on the processing table of a numerically controlled (NC) machine can be freely reversed within a predetermined angle range by a reversing device, and the jig is set at the press-fitting position. The present invention relates to a press-fitting device configured to hold the jig with backup.

[Prior art 1] Conventionally, in a cylinder head in which intake (IN) valves and exhaust (EX) valves are arranged in a V-shape, the cylinder head has IN, EX valve guides, and INXE valve guides.
To press-fit the X valve seat, since there are two press-fit directions for the valve guide and valve seat, IN and EX, it is not possible to press-fit in a single direction, so special press-fit devices must be used for IN and EX. , each was press-fitted separately. Note that there is Japanese Patent Publication No. 53-21145 as a prior art technique for inserting a valve into a cylinder head. [Problems to be Solved by the Invention] For this reason, a dedicated press-fitting device is required for IN and EX, and furthermore, the cylinder head can be mounted and removed using a press-fitting device dedicated to IN and a press-fitting device dedicated to EX. The cylinder head must be transported between each press-fitting device, which increases the number of steps and setup time. When press-fitting guides and valve seats, the jig itself must be replaced, which poses a problem when producing large quantities on a production line. The present invention was made in order to solve the problems of the conventional device described above, and it is possible to
Installed a reversing jig and backup that can accommodate the valve angle of N1EX, and turned it on. By making it possible to automatically change the difference in the EX pulp angle and inverting the jig itself, it is possible to press-fit the IN and EX valve guides and the IN and EX valve seats with a single press-fitting device, reducing the number of steps. We provide a versatile press-fitting device that reduces setup time, can easily accommodate different cylinder heads with different valve angles, and is fully compatible with mass production on production lines. be.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a valve guide for a cylinder head and a valve seat press-fitting device. , and a processing table that is movable between the reversal positions;
A jig that is mounted on the processing table so that it can be rotated within a predetermined angle range using a reversing device, a backup that holds the jig in the press-fit position, and a cylinder head fixed on the jig that inhales and exhausts air. In order to press-fit the valve guide and the intake and exhaust valve seats, the cylinder head is composed of an intake J exhaust pulp guide press-fit device and a suction and exhaust valve seat press-fit device, which are installed on the same press-fit phase line. After being positioned and fixed to the jig at the installation/removal position, one valve guide and valve seat are press-fitted at either the intake side or exhaust side press-fit position, and after being reversed at the reverse position, the intake side or exhaust side The other valve guide and valve seat can be press-fitted at the other press-fitting position.

[For production]

- Based on the above configuration, according to the press-fitting device of the present invention, N
A jig with a reversing device is installed on the processing table of the Ca machine so that the difference in pulp angle between IN and EX can be automatically changed, and in order to avoid applying pressure force to the processing table of the NO machine. When press-fitting the valve guide and valve seat, after positioning and fixing the cylinder head to the jig at the installation/removal position, move the jig to either the IN or EX press-fit position. Hold the jig and cylinder head with backup, and press fit the IN or EX valve guide and valve seat. Next, when one side of IN or EX is press-fitted, release the backup jig and its hold on the cylinder head, move the jig to the inverted position, reverse the jig, and from the inverted position to the other side of IN or EX. , and press-fit the other valve guide and valve seat in the same manner as described above. Therefore, according to the present invention, it is possible to press-fit IN and EX valve guides and IN and EX valve seats without replacing jigs with a single press-fitting device, and the device can be adapted to many types of cylinder heads. Furthermore, by adjusting the stopper of the reversing device, etc., the press-fitting device can be made into a versatile press-fitting device that can be easily adapted to cylinder heads with different valve angles.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view showing the entire press-fitting device using the NCII machine of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a top view of FIG.
O machine, 2 is the bed of NO machine 1, 3 is the gutter fixed to bed 2, 4 is the base installed on bed 2, 5
is a rail installed on the base 4, 6 is a machining table movably installed on the rail 5, 7 is a reversing jig installed on the machining table, and 8 is an inverting jig supporting the reversing jig 7. A jig leg 9 is a clamping device 10.10' for the cylinder head W fixed to the reversing jig 7. 11 is a backup, which is connected to the top via cylinders 10a, 10a', and 11a respectively attached to the gutter 3. It is supported so that it can be moved downward. 12.12' IN, EX valve seat press fitting tools 12a, 12a' and press fitting operation cylinder 1
2b. 12b' is an IN/EX valve seat press-fitting device, and 13.13' is an IN/EX valve guide press-fitting tool 1.
3a, 13a' and press-fitting cylinder 13
b. This is an IN/EX valve guide press-fitting device consisting of 13b'. Here, the above IN, EX valve seat press-in device 12°12
', and IN, 'EX valve guide press-fit device 13゜1
3' are located on the same horizontal press-fitting axis Ll. In addition, the reversing jig 7 installed on the processing table 6 moves the cylinder head W along the rail 5.
Installation/removal position aA, IN, EX press-fit position B, B',
The inversion position IFC is moved. Above, at the mounting/removal position A of the cylinder head W,
A positioning device 14 for mounting the cylinder head W on the reversing jig 7 is provided on the bed 2, and its details are shown in FIGS. 4 and 5 (X arrow view in FIG. 4). Frames 16a, 16a are erected on the bed 2, and a bracket 16c with both ends fixed to the frames 16a, 16a is installed horizontally, and the cylinder body of the cylinder 17 for reciprocating the positioning bin is located approximately in the center of the bracket 16c. 17a is fixedly installed. Furthermore, guide bushes 18.18 are mounted and fixed on both sides of the bracket 113c, and a guide bar 19.19 is slidably inserted into both guide bushes 18.18. A support plate 20 is fixed to the tip of the bar 19.19. Further, a clamp portion 20a is formed approximately in the center of this support plate 20, and a plunger 17b protruding from the cylinder body 17a of the cylinder 17 for reciprocating the positioning bin is attached to the support plate 20 through a joint 21.
0 clamp part 20a. Further, a plurality of rods 22 are erected on the support plate 20, and the plunger 1 is attached to the tip of each rod 22.
When the cylinder head 7b is in the forward protruding state, the positioning pins 23 each engage with a plurality of positioning pin engagement holes Wa provided in the cylinder head W placed on the reversing jig, and the setscrews 24
Fixed by Further, a pedestal 16b having both ends fixed to the upper portions of the pedestals 16a and 18a is installed horizontally, and a cylinder main body 25a of a positioning cylinder 25 is fixed approximately in the center of this pedestal 16b. Further, guide bushes 26°2 are provided on both sides of the pedestal 16b.
6 are each mounted and fixed, and both guide bushes 2
A guide bar 27.27 is slidably inserted through 6.26, and a positioning member 28 is fixed to the tip of this guide bar 27.27. Also, a clamp portion 28a is provided approximately in the center of this positioning 28.
is formed, and the plunger 25b protruding from the cylinder body 25a of the positioning operation cylinder 25 is connected to the clamp portion 2 of the positioning 28 via the joint 29.
8a. On the other hand, the cylinder head mounting base 30 of the reversing jig 7 is formed with a working hole 30a, and a push bolt 31 is screwed into the cylinder head mounting base 30. The cylinder head mounting base 32 is fixed on the cylinder head mounting base 30 by engaging with the recess 32a of the cylinder head mounting base 32. Note that the reference numeral 33 is a nut for preventing the push bolt 31 from loosening. Further, the cylinder head mounting table 32 is formed with a working rear hole portion 32a and an insertion hole 23a for the positioning bin 23 corresponding to the type of cylinder head W. 6 to 8 are detailed views of the reversing jig 7, and there are shaft portions 34a on both sides of the cylinder head mounting base 300,
34b are fixedly provided, and each is pivotally supported by the reversing jig legs 8 via bearings 35. Further, the shaft portion 34a projects from the reversing jig leg 8, and a lever 36 is fixed to a projecting shaft end portion 340 of the shaft portion 34a. Further, the cylinder of the reversing jig operating cylinder 15, which is a reversing device, is attached to the side surface of the reversing jig leg 8 on the lever 36 side and the bracket 38 fixed to the reversing jig leg B via a bolt 37. Cylinder pivot shafts 15b fixed to the base end of the main body 15a are each pivoted via bearings 39, and the tip screw of the plunger 15c protrudes from the cylinder main body 15a of the cylinder 15 for operating the reversing jig. A joint 40 is screwed onto the portion 15d, and the opposite side of the joint 40 to the threaded portion 15d is connected to a pin 41.
It is pivotally supported at the tip of the lever 36. Note that the bin 41 is removable and the joint 40 is replaceable. Furthermore, the rear end 15 of the cylinder body of the plunger 15c
A rear end threaded portion ISe is provided at the end protruding from f, and a stopper 42 is threaded onto this threaded portion 15e, so that the position of the stopper 42 relative to the plunger 15c can be adjusted. Reference numeral 43 indicates a lock nut for preventing the stopper 42 from loosening. The position of the stopper 42 in the plunger 15C is as follows:
In FIG. 6, when the reversing jig actuating cylinder 15 is actuated and the plunger 1?15c moves forward in the right direction, the stopper 4 screwed onto the rear end threaded portion 15e of the plunger 15c
2 comes into contact with the rear end 15f of the cylinder body and the plunger 15
C stops moving in the forward direction, thereby setting the counterclockwise rotation stop position of the lever 36 (in FIG. 6, the lever 36 is in the shape of a two-dot chain line M), and at this time, the cylinder head mounting table Cylinder head W set on 32
The center line of the EXX side pulp 1-12 is aligned with the EX valve seat press fitting device 12' and the EXX pulp guide fitting R1.
3' so as to be parallel to and coincide with the same press-fitting axis L'. In addition, the length E from the stopper surface 40a of the joint 40 to the center of the bottle 41 is, as shown in FIG. Threaded part 15
The stopper surface 40a of the joint 40 screwed into the cylinder body 150 comes into contact with the front end 150 of the cylinder body, and the movement of the plunger 15c in the backward direction is stopped, whereby the rotational stop position IF in the clockwise direction of the lever 36 is lower than the sixth factor. , the lever 36 is set as a solid line), and at this time, the center line of the INN side pulp 1 of the cylinder head W set on the cylinder head mounting table 32 is aligned with the IN valve seat press-fitting device 1.
2 and the IN valve guide press-fitting device 13 in parallel with the same press-fitting axis aL. Note that the symbol F is the distance between the valve holes H1 (Hz) in adjacent cylinders of the cylinder head W. Next, the operation of press-fitting a valve guide and a valve seat into the cylinder head W using the press-fitting device configured as described above will be described in detail with reference to the drawings. First, when installing the cylinder head W, use the reversing jig 7.
is moved by the processing table 6 of the NC machine 1 and is located at the cylinder head mounting/removal position A, as shown in FIGS. The cylinder head W is placed as shown in FIGS. 9 and 10. Here, the horizontal line is IN
This is the press-fitting axis of the valve guide and IN valve seat, and P
The point becomes the rotation center of the reversing jig 7. In addition, H1 in the figure is the IN side valve hole of the cylinder head W.
Hz indicates the EX side valve hole. At this time, the reversing jig operating cylinder 15 of the reversing jig 7 is retracted as shown in FIG. 6, and the lever 36 is at the position indicated by the solid line. Next, as shown in FIG. 11, the cylinder 17 for reciprocating the positioning bin is operated, and the plunger 17b is moved to project, so that the positioning bin 23 is engaged with the positioning bin engagement hole Wa provided in the cylinder head W. At the same time as the cylinder head W is positioned on the cylinder head mounting table 32 of the reversing jig 7, the positioning actuating cylinder 25 is activated, and the plunger 25b is moved to protrude, so that the positioning 28 is lowered, and the cylinder head W is It is temporarily clamped on the mounting table 32, and in this state, the clamp device 9 rotates to complete clamping of the cylinder head W. As described above, when the cylinder head W is positioned on the mounting table 32 and clamped by the clamp device 9,
As shown in FIG. 12, the plungers 17b, 25
b retreats, the positioning bin 23I5 and the positioning 28 return to their original positions, and the reversing jig 7 moves the processing table 6 of the NCi machine 1 to I as shown in FIGS. 2 and 3.
Move to the N press-in position and set. At this time, the center line of the INN pulp H1 in the first cylinder in the cylinder head W coincides with the press-fitting axis. When the reversing jig 7 is set to the IN press-fitting position ff1B, as shown in FIG. 13, the cylinders 10a and 11a
is activated and the backup 10.11 is lowered to hold the reversing jig 7 and the cylinder head W. At the same time, the IN valve seat press-fitting device 12 and the IN pulp guide press-fitting device 13 are moved in the direction of the arrow from the left and right of the press-fitting axis. and IN valve seat S1 and IN valve guide T.
1 into the cylinder head W. When the IN valve seat $1 and the INN pulp guide 1 are press-fitted into the first cylinder of the cylinder head W,
IN valve seat press fitting W112 and INN pulp guide fitting 13 return to their original positions, and backup 1
0.11 is raised, the processing table 6 of the NC machine 1 is moved by the distance R using the NC 8, and the reversing jig 7 is set, and the backup 10.11 is lowered again and the above operation is repeated, so that the cylinder IN valve seat S1 and IN valve guide T of the next cylinder in head W
1 is press-fitted, and the above-described operation is repeated for the number of cylinders in the cylinder head W to complete the press-fitting of the IN valve seat St and the IN valve guide T1 of the cylinder head W. After completing the series of press-fitting operations on the IN side, the NCIIN machine 1
As shown in FIGS. 2 and 3, the processing table 6 of
Move from the IN press-fit position to the reversal position C, and turn the reversal jig 7.
is set to the reverse position. In the above-mentioned reversal position, as shown in FIG.
5c moves forward in the right direction, and the stopper 42 screwed onto the rear end threaded portion 15e of the plunger t715c engages the cylinder body 1f.
i i The lever 36 rotates a predetermined angle counterclockwise around the reversing jig rotation center P until it comes into contact with 15f, and the stopper 42 comes into contact with the rear end 15f of the cylinder body and the lever 3G stops rotating. and the lever 36 is 2 points 1
The cylinder head mounting base 30, cylinder head mounting base 32, and cylinder head @ mounting base 3 of the integrated reversing jig 1 are connected via the lever 36 and the shaft portion 34a.
The cylinder head W, which is positioned and fixed on the cylinder head 2, is reversed about the rotation center P of the reversing jig to be in the state shown in FIG. Subsequently, the processing table 6 moves from the reversing position C shown in FIGS. 2 and 3 to the EX press-fitting position B', and the reversing jig 7
is set at EX press-fit position IB'. At this time, the center line of the EXX pulp H2 in the first cylinder in the cylinder head W coincides with the press-fitting axis aL'. When the reversing jig 7 is set to the EX press-fitting position ff1B', the cylinder 10a' is activated and the backup 10' is lowered to hold the reversing jig 7, as shown in FIG. The EX valve seat press-fitting device 12' and the EX valve guide press-fitting device 1f113' move in the direction of the arrow to press-fit the EX valve seat s2 and the EX valve guide T2 into the first cylinder of the cylinder head W. When the EX valve seat S2 and EX valve guide Tz are press-fitted into the first cylinder of the cylinder head W,
EX valve seat press-in device +2'. When the EX valve guide press-fitting device 13' returns to its original position, the backup 10' is raised, and the NC device moves the processing table 6 of the NC machine 1 by the distance R, and the reversing jig is set. ' is lowered again and repeats the above operation, so that the EX valve seats Sz and EX of the next cylinder in the cylinder head W are
The pulp guide T1 is press-fitted, and the above-mentioned operation is repeated for the number of cylinders in the cylinder head W, and the EX valve seat sz of the cylinder head W and the EX valve guide T2 are
This completes the press-fit. When the series of press-fitting operations on the EX side are completed, the processing table 6 of the NC machine 1 is moved to the EX press-fitting position W8 in FIGS. 2 and 3.
', returns to the cylinder head mounting/removal position 11A, and the reversing jig 7 is set at the cylinder head mounting/removal position WIA as shown in FIG. That is, when the reversing jig 7 returns to the cylinder head mounting/removal position IA, the reversing jig operating cylinder 15 of the reversing jig 7 operates as shown in FIG. The plunger 15c of the cylinder 15 retreats to the left, and the stopper surface 40a of the joint 40 screwed onto the tip threaded portion 15d of the plunger 15c moves to the front end 15g of the cylinder body.
The lever 36 rotates by a predetermined angle clockwise about the reversing jig rotation center P from the state indicated by the two-dot chain line until the stopper surface 40a comes into contact with the front end 1 of the cylinder body.
5g, the lever 36 stops rotating, and the lever 36
returns to the state shown by the solid line, and the cylinder head mounting base 30, cylinder head mounting base 32, and cylinder head W of the integrated reversing jig 7 are reversed via the lever 36 and the shaft portion 34a to return to the original state. Thereafter, the clamping device 9 becomes unclamped, the cylinder head W is taken out from the reversing jig 7, and the press-fitting process of the valve seat S and valve guide T is completed. Note that when press-fitting the valve seat S and the valve guide T into different types of cylinder heads W, the cylinder head mounting table 32 of the reversing jig 7 or the support plate with the positioning bin 23 of the positioning device 14, the positioning 28 Compared to replacing the conventional jig itself, setup time can be significantly shortened. Furthermore, when press-fitting the valve seat S and the lower part of the valve guide into another cylinder head W with a different valve angle, it is easy to just adjust the stopper 42 of the reversing jig operating cylinder 15 or replace the joint 40. This greatly reduces setup time compared to replacing the conventional jig itself, and since there is only one reversing jig 7, it is possible to replace several types of relatively large jigs unlike conventional ones. There is no need to prepare any. Further, in the above embodiment, the IN side valve seat and valve guide are press-fitted before the EX side valve seat and valve guide are press-fitted, but this is not limited to the above embodiment. After the side valve seat and valve guide are press-fitted, the IN-side valve seat and valve guide may be press-fitted. [Effect of the invention 1] As explained in detail above, the press-fitting device according to the present invention has the following features:
Cylinder head valve guide, valve seat, - press-fitting device, NC machine processing tape □ No. 1. A jig for attaching the cylinder head is attached to the top so that it can be rotated freely within a predetermined angle range using a reversing device, and the jig is held in a press-fit position by backup, and a V-shaped valve guide, Since the jig rotates in the direction of press-fitting the valve seat, it is possible to insert I into the cylinder head with one press-fitting device without replacing the jig.
It is possible to press fit the N and EX valve seats and the IN and EX pulp guides, greatly reducing the number of steps and setup time. In addition, it can be easily adapted to cylinder heads of different types or cylinder heads with different valve angles, and can sufficiently cope with mass production on a production line.

[Brief explanation of drawings]

Fig. 1 is a front view showing the entire press-fitting device using the NCl1 machine of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a top view of Fig. 1, and Fig. 4 is a positioning device according to the present invention. FIG. 5 is a front view showing the details of FIG. 4, FIG. 6 and FIG. 7 are detailed views showing the reversing jig according to the present invention, and FIG. ■Cross-sectional views, FIGS.
FIG. 1 is a detailed view of section D in FIG. 9. 1... NCf1 machine, 4... Base, 5... Race, 6... Processing table, 7... Jig (reversing jig),
9... Clamp device, 10.1.0', 11...
・Backup, 12.12...lN1EX valve seat press-fitting device, 13.13'...IN, EX valve guide press-fitting device, 14...positioning device, 15...
Reversing device, 23... Positioning bin, 32... Cylinder head mounting base, A... Cylinder head mounting/removal position, B, B'... Press-fitting position, C... Reversing position, W
···cylinder head. Patent applicant Fuji Heavy Industries Co., Ltd. Agent Patent attorney Jundo Kobashi Patent attorney Susumu Murai Figure 5

Claims (1)

[Claims] In a cylinder head valve guide and a valve seat press-fitting device, the mounting/removal position, press-fitting position, and reversal position of the cylinder head can be determined via a rail installed on the base of a numerically controlled machine. a processing table that is movably installed; a jig that is mounted on the processing table so that it can be rotated freely within a predetermined angle range by a reversing device; a backup that holds the jig in a press-fit position; In order to press-fit the intake and exhaust valve guides and the intake and exhaust valve seats into the cylinder head fixed to the After the above-mentioned cylinder head is positioned and fixed to the jig at the mounting/removal position, one valve guide and valve seat are press-fitted at either the intake or exhaust side press-fit position, and then at the reverse position. A press-fitting device characterized in that, after being reversed, the other valve guide and valve seat can be press-fitted at the other press-fitting position on the intake side or the exhaust side.