JPS6320654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve seat processing apparatus for a wheel rim having a flange portion for connecting plate spokes, particularly for a flange rim made of light alloy.

Generally, with this type of flange rim, it is necessary to process and form a valve seat for mounting the valve by cutting the flange portion. However, if the valve seat is machined using the normal press cutting method, in which the cutting blades intersect with each other, the cutting blade and the rim will interfere, and the cut portion of the flange will be cut into the valve by the thickness of the cutting blade. The flange moves away from the base of the flange, which is the correct mounting position, toward the tip. Therefore, in order to mount the valve, the remaining flange portion must be further removed, making the work extremely time-consuming and complicated.

Therefore, the present invention provides a valve seat processing device capable of cutting a flange portion substantially from its root portion,
The object of this invention is to eliminate the above-mentioned drawbacks.

For example, as shown in FIG. 3, the present invention includes a slider 13 movably supported by a frame 11 and reciprocated by a reciprocating drive means 16; The base 19 is movably supported, and is fixed to the slider 13 and the base 19, and is arranged so that the cutting edges 14a and 14'a are aligned when the slider and the base are brought into contact with each other and moved together. cutting blades 14, 14',
The flange portion 1 of the flange rim 1 is located between these cutting blades and can move within a certain range in the same direction as the slider 13 and the base 19.
a fixing jig 35 capable of fixing the flange 1 so that the root portion of the flange 14 is aligned with the cutting edge of the cutting blades 14, 14'; a holding device 25 for controlling the movement of the base 19; and the slider 13 and the base. 19
a detecting section 17 that detects the position of the slider 13 when the cutting edges of both cutting blades 14, 14' fixed to the blade substantially contact each other; and a signal from the detecting section 17 to release the armrest of the armrest device 25. and a lever release means 26 which is driven as such and allows the slider 13 and the base 19 to move together with the cutting edges of the cutting blades 14, 14' in contact with each other. Located in the valve seat processing equipment.

Hereinafter, the present invention will be specifically explained based on the embodiments shown in the drawings. First, prior to the explanation of the embodiments,
Regarding the flange rim to which the present invention can be applied, the first
This will be explained with reference to the drawings and FIG.

The flange rim 1 is formed by bending a light alloy shape into an annular shape and then welding both ends, and includes a drop part 1a, a bead part 1b, 1
b, ear portions 1c, 1c, and a flange portion 1d hanging inward from the center portion of the inner diameter side of the drop portion 1a. Then, the tire 3 is attached to the rim 1, and the flange portion 1
A plate spoke 6 for connecting the axle 5 and the rim 1 is fixed to the rim d via a rivet 7 or the like. Furthermore,
The flange portion 1d is notched at one location on the circumference to form a valve seat 1e, and a valve 9 is provided on the valve seat 1e. Also, valve seat 1e
In this case, a hole 1f for mounting a valve is bored through the drop part 1a, and the drop 1 of the hole 1f is
A counterbore 1g is provided on the a side. On the flange portion 1d side, the flange portion is cut from the root portion to form a planar mounting seat 1i that is substantially continuous with the rim bottom surface 1h.

Next, an embodiment of the present invention will be described with reference to FIGS. 3 and 4.
This will be explained along the diagram.

The valve seat processing device 10 has a frame 11, and a slide bar 12 is vertically fixed to the frame 11. A slider 13 having a stopper 13a and a cutting blade 14 fixed to its lower end is slidably fitted into the upper part of the slide bar 12, and the slider 13 is connected to the balance cylinder device 1.
5 and a drive cylinder device 16, which is a reciprocating drive means, so as to be movable in the vertical direction. Further, a limit switch 17 constituting a detection section is provided in a portion of the frame 11 facing the slider 13, and the switch 17 detects the position of the slider 13, and hence the cutting blade 14, and outputs a predetermined signal. be able to. On the other hand, a base 19 having a stopper 19a and a cutting blade 14' fixed to its upper end is slidably fitted into the lower part of the slide bar 12, and a coil spring 20 is compressed between the base 19 and the frame 11. The spring 20 constantly urges the base 19 upward to balance the weight. Note that the cutting blade 14 of the slider 13
The cutting blade 14' of the base 19 has both cutting edges 14a, 1.
4a' are configured to match. A link 21 is pivotally attached to the base 19 via a pin 25a, and an L-shaped arm 23 supported rotatably in the directions of arrows A and B about a pin 25b is attached to the link 21 via a pin 25c. A so-called toggle device 25 is formed. A lock cylinder device 26 driven by the limit switch 17 is connected to the arm 23, and the cylinder device 26 can release the arm of the toggle device 25, which is a toggle device. Further, the frame 11 is provided with a table 30 that is supported movably in the vertical direction by four guide bars 27 and a lift cylinder device 29, and a portion of the table 30 corresponding to the cutting blade 14' is A notch 30a is formed to eliminate interference between the cutting blade 14' and the table 30. Further, a slider block 31 is slidably provided on the right frame 11 of the table 30 in FIG. 3, and a link 32 is pivotally attached to the block 31. A crank 33 is pivotally attached to the link 32, and the crank 33 is rotationally driven by an appropriate means to freely move the block 31 in the directions of arrows C and D. Further, a fixing jig 35 for fixing the flange rim 1 is supported on the block 31 so as to be movable in the vertical direction, and a coil spring 36 is compressed between the block 31 and the jig 35, and the spring 36 is connected to the jig. 35 is always urged upward. The jig 35 normally holds the block 3 by a spring 36.
It is positioned in contact with a stopper screw 31b that is screwed onto the upper end of an arm 31a provided in the arm 31a, and the amount of downward protrusion of the screw 31b can be freely adjusted. Note that a guide rail 3 for transporting the flange rim is provided on the top of the table 30.
7, 37 are fixed to the frame 11, a support 39,
It is supported and installed by 39. Further, 38 is a guide member for moving the slider 13 in the vertical direction.

Next, the operation of the present valve seat processing device 10 will be explained.

First, with the slider 13 raised, the table 30 is moved upward by the lift cylinder device 29, and set so that the guide rails 37, 37 and the table surface are at the same position. In this state,
After the flange rim 1 sent along the guide rails 37, 37 is transferred to the table 30 and clamped, the table 30 is moved downward by the lift cylinder device 29. Then, when the table 30 has descended a certain distance, the crank 3
3. Slider block 31 via link 32
is driven to protrude in the direction of arrow C, that is, toward the table 30, and the fixing jig 35 of the block 31 attaches to the drop portion 1a of the flange rim 1, the bead portion 1b, the ear portion 1c,
1c to accurately position the flange rim 1 at a predetermined cutting position. In this state, the drive cylinder device 16 is driven so that the slider 1
3 is moved downward along the slide bar 12 together with the cutting blade 14, the cutting edge 14a of the cutting blade 14 comes into contact with the flange portion 1d of the flange rim 1, and when the slider 13 further descends, the table 30 descends together with the slider 13. To go. Further, when the table 30 is lowered, that is, into the state shown in FIG. 14 and abuts against each other. At this time, the fixing jig 35 that positions the flange rim 1 also moves downward on the slider block 31 against the coil spring 36 together with the table 30. Note that the initial engagement position between the fixing jig 35 and the flange rim 1 is at the arm 31a.
This can be adjusted by moving the stopper screw 31b upward and downward as appropriate. and,
When the cutting blades 14 and 14' face each other with the flange portion 1d in between, the slider 13 further moves the cutting blade 1
4 and descends downward. Then, as shown in FIG. 5, the cutting blades 14, 14' cut into the flange portion 1d to cut the valve seat 1e, but the cutting blades 14, 14' cut into the flange portion 1d along the rim bottom surface 1h. Since the cutting edges 14a and 14a' sharply protrude from both sides of the portion 1d and are formed to coincide with each other, the cutting blades 14 and 14' do not interfere with the bottom surface 1h of the flange rim 1 during cutting.
The flange portion 1d is accurately cut from the root portion, which is the normal mounting position of the valve 9. In addition, at this time,
The arm 23 of the toggle device 25 is in a state where it is rotated in the A direction, that is, each pivot pin 25a, 25b, 25c
is held at the elbow position of the torgue device 25, which is located almost in a straight line, and therefore the base 19 is firmly fixed and held in a predetermined position together with the cutting blade 14', but the fixing jig 35 and the table 30 are free. As the rim 1 moves downward, the flange portion 1d is cut by the cutting blades 14, 14' from both sides with the same force. Then, the stopper 13a of the slider 13 and the base 19,
19a comes into contact with the cutting edge 14 of the cutting blade 14, 14'.
When a and 14a' almost touch each other at the center of the flange portion 1d, the limit switch 17 of the frame 11 is closed, and the lock cylinder device 26 is driven by the signal to rotate the arm 23 in the direction B, and the pin 25c is rotated in the direction B. pins 25a, 25b up to
from the position where they are almost in line with each other, to the side in FIG. 3. Then, the base 19 cannot support the downward pressing force transmitted through the stoppers 13a and 19a, and moves rapidly downward together with the cutting blade 14' against the coil spring 20. At this time, the lower end of the fixing jig 35 that positions and fixes the flange rim 1 comes into contact with the slider block 31, so that it cannot move any further downward, and the flange rim 1 is fixed. Then, the uncut portion left between the cutting blades 14 and 14' is completely cut by the upper cutting blade 14, and only the cut portion 1j is left as shown in FIG. It moves together with the cutting blades 14, 14' relative to the rim 1, and the cutting portion 1j is reliably separated from the rim 1, completing the cutting of the valve seat 1e portion. Thereafter, the slider 13 is moved upward by the drive cylinder device 16, and the table 30 is also moved upward together with it. When the table 30 returns to a predetermined height, the slider block 31 is driven to move in the direction D, and the flange rim 1 The positioning engagement relationship with the fixing jig 35 is released. Then, when the table 30 reaches the guide rail 37, 37' position,
The processed flange rim 1 on the table 30 is placed on guide rails 37, 37' and transported to the next process.
On the other hand, the lock cylinder device 26 is
Limit switch 17 opened by the rise of 3
The arm 23 sets the pin 25c of the toggle device 25 to a position that is almost in line with the pins 25a and 25b, and enters a standby state for the next machining of the flange rim 1.

The embodiment described above is based on the flange 1 of the flange rim 1.
Although the case where the cutting of d is performed from the top and bottom directions has been described, next, an embodiment in which the cutting is performed from the left and right directions, that is, from the lateral direction will be described with reference to FIG. The valve seat machining device 10' according to this embodiment is also similar to the above-mentioned embodiment, and the same parts as those explained in FIGS. 3 and 4 are given the same reference numerals, and the explanation thereof will be omitted.

A slider block 31 on the frame 11 to which a fixing jig 35 is fixed is supported so as to be slidable in the directions of arrows E and F, and the block 31 has a slide rod that is slidably supported on the frame 11. 40 is fixed. The slide rod 40 protrudes from the left end of the frame 11, and lock nuts 41, 41 are screwed into the tip thereof. Therefore, the slider 1 is moved by the drive cylinder device 16.
The cutting blade 14, which has moved in the direction of the arrow E together with the flange rim 1 positioned on the fixing jig 35,
The rim 1 is brought into contact with the base of the flange portion 1d of the rim 1, and the rim 1 is moved in the E direction together with the fixing jig 35, slider block 31, and slide rod 40. Then, the cutting blade 14' fixed together with the base 19 by the toggle device 25 comes into contact with the flange portion 1d, and the cutting blades 14, 14' cut into the valve seat 1e portion as shown in FIG. cutting blade 14,
When the pins 14' are almost in contact with each other, the pin 25c of the doggle device 25 is moved upward in the drawing by the arm 23, and the cutting blades 14, 14' are both moved in the E direction.
At this time, the slider block 31 is
The flange rim 1 is fixed because the lock nut 41 of No. 0 comes into contact with the frame 11 and cannot move any further in the E direction.
Only the cut portion 1j moves in the E direction together with the cutting blades 14, 14' as shown in FIG.
j is separated with respect to rim 1. Valve seat 1e
When the cutting of the portion is completed, the cutting blade 14 is moved in the F direction, the slider block 31 is also moved in the F direction, and the processed rim 1 is manually extracted upward from the jig 35. The stopping position of the slider block 31 can be adjusted by changing the screwing position of the lock nuts 41, 41 of the slide rod 40, so that the optimum position for cutting can be set.

As explained above, according to the present invention, the cutting process of the valve seat 1e of the flange rim 1 is performed using the cutting edge 14.
With the cutting blades 14 and 14' where a and 14a' match,
This is done by cutting from both sides of the flange portion 1d, so the cutting blades 14, 14' and the flange rim 1
This makes it possible to accurately cut the flange part 1d from the root of the flange, which is the normal mounting position of the valve, greatly simplifying the processing and forming work of the valve seat 1e and improving work efficiency. can be improved. Furthermore, since the cutting blades 14 and 14' are moved relative to the flange rim 1 when the cutting blade tips 14a and 14a' are almost in contact with each other, that is, just before they are completely in contact, the flange rim made of light alloy, etc. , the work can be carried out reliably even when cutting highly ductile materials. Also,
The base 19 is supported on the frame 11 so as to be movable in the same direction as the slider 13, and the armrest device 2
The movement is controlled by 5, and the flange rim 1
Fixing jig 35 of slider 13 and base 19
A detection unit 1 that can move within a certain range in the same direction as the slider 13 and further detects a predetermined position of the slider 13.
Since the base 19 is configured to move integrally with the slider 13 by releasing the arm of the arm arm device 25 in response to a signal from the arm 7, the cutting blades 14, 14' cut from both sides of the flange section 1d.
Only the slider 13 is required to drive the cutting, and the timing of the cutting of the cutting blades 14 and 14' and the movement of both cutting blades relative to the fixed jig 35 are extremely easy and accurate. Coupled with the fact that the tools 35 move in the same direction, operation can be ensured and the structure can be made extremely simple and compact. Furthermore, since the fixing jig 35 of the flange rim 1 is designed to be movable within a certain range, both cutting blades 14 and 14' apply equal force to the flange portion 1d of the flange rim 1 due to the law of action and reaction. Therefore, no force other than cutting, such as a bending moment, is applied to the flange rim 1, and deformation of the rim 1 during processing of the valve seat 1e can be reliably prevented. In addition, the flange part 1
d, the cutting edges 14a and 14a' of the cutting blades 14 and 14' are cut from both sides, that is, cut like cutting, so the cut surface can be formed extremely smoothly without any burrs or sag, and the Post-processing operations such as the following can be eliminated or greatly simplified.

[Brief explanation of the drawing]

Fig. 1 is a partial front view showing a flange rim to which the present invention can be applied, Fig. 2 is a sectional view of the valve seat portion thereof, and Fig. 3 is a front sectional view showing an embodiment of the valve seat processing device according to the present invention. Figure 4 is its side view,
5 and 6 are enlarged sectional views of essential parts showing the operation thereof, and FIG. 7 is a front view showing another embodiment of the valve seat processing apparatus according to the present invention. 1...flange rim, 1b...flange part, 10,
10'... Valve seat processing device, 11... Frame, 1
3...Slider, 14, 14'...Cutting blade, 14a,
14a'...Blade tip, 16...Reciprocating drive means (drive cylinder device), 17...Detection section (limit switch), 19...Base, 25...Archive arm device (toggle device), 26...Archive release means (lock cylinder device), 35... fixing jig.

Claims (1)

[Scope of Claims] 1. A slider movably supported by a frame and reciprocated by a reciprocating drive means, a base supported by the frame so as to be movable in the same direction as the slider, and fixed to the slider and the base. and a cutting blade arranged so that its cutting edges coincide when the slider and the base come into contact and move together, and a cutting blade located in the area between these cutting blades and the same as the slider and the base. a fixing jig capable of moving within a certain range in a direction and fixing the flange so that the root portion of the flange portion of the flange rim coincides with the cutting edge of the cutting blade; , a detection unit that detects the position of the slider when the cutting edges of both cutting blades fixed to the slider and the base substantially contact each other; and a drive unit that is driven to release the armrest of the armrest device based on a signal from the detection unit. a flange rim valve seat processing device, comprising: a lever release means that allows the slider and the base to move together with the cutting edge of the cutting blade in contact with each other;