JPS6238049B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to crankshaft torsion presses, and more particularly to improvements thereof.

2. Description of the Related Art Conventionally, there is a press shown in FIGS. 1 and 2 as a press for twist-forming a crankshaft. The lower mold 2 for torsion forming of the crankshaft of this press 1 is carried out by a hydraulic cylinder 6 mounted on a fixed bolster 3 and attached to the press bed 5 via a torsion beam 4, and the upper mold 7 is held by an adapter plate 9 fixed to the lower surface of the slide 8 with bolts, and is pulled back by pneumatic cylinders 10 attached to the front and rear of the slide 8. However, in recent years, press mold replacement work has become easier and faster, and with this, it is desirable to replace the upper and lower molds of this press outside the press, but the above-mentioned torsion hydraulic cylinder and upper mold Since the retracting pneumatic cylinders have drawbacks such as being attached to the press bed and slide, respectively, it has been impossible to replace the upper and lower dies outside the press.

The present invention provides a crankshaft torsion press that eliminates the above-mentioned drawbacks, and one embodiment thereof will be described below in the third embodiment.
This will be explained based on FIGS. 17 to 17.

In Figures 3 and 4, 11 is a press for twisting the crankshaft, 12 is its crown, and 13 is a press for twisting the crankshaft.
is the same column, 14 is the same bed, 15 is the slide,
16 is a gib which is a guide for the slide 15, 17 is a main hydraulic cylinder for the slide 15, and 18 is a retraction hydraulic cylinder for the slide 15. A moving bolster 19 is mounted on the bed 14 and is movable in the front and rear directions of the press.It is movable on a sliding plate 20 extending from above the bed 14 to the rear of the press by a moving hydraulic cylinder 21. Clamp devices 22 provided before and after the bed 14
It is fixed on the bed 14 by. On the moving bolster 19, as shown in FIGS. 5 to 8, there is a crankshaft torsion device 23, and as shown in FIGS. A lower die holder 27 is attached via a fixed bolster 3. The crankshaft (first
1) 24 is such that its central crank portion 25a is twisted, for example, in the press rear direction A, and its both end crank portions 25b are twisted at a predetermined angle toward the press front B. Therefore, the central and both end crank portions Lower mold holder 27 corresponding to 25a, 25b
a and 27b are rotatably held on the moving bolster 19 via an intermediate support 29 each having a plurality of rollers 28 and a fixed bolster 3. Note that the torsion crank portion 25a,
Intermediate crank part 25c located between 25b
Since the lower die is not twisted, the lower die is held in that state on the moving bolster 19 via the lower die holder 27c and the fixed bolster 3. and,
A pair of supports 30 are vertically installed on both sides of the lower die holder 27 on the moving bolster 19, and support the pair of torsion beams 31, 32 so as to be rotatable about the clamp axis. Each of the pair of torsion beams 31 and 32 is configured in a gate shape as shown in FIGS. 5 to 10, and has both arms 31a and 32a.
A shaft body 33 is inserted through the end portion and rotatably supported by the support body 30, and the connecting rods 31b, 3
2b are supported so that they are opposite to each other on the front and back of the moving bolster 19, and the lower torsion mold holders 27a and 27b are attached to the connecting rods 31b and 32b of the mounting body 3, respectively.
They are connected via 4. That is, the connecting rod 3
The lower torsion mold holder 27b at both ends of the crankshaft 24 is connected to the front torsion beam 31 with 1b located at the front of the press via a mounting body 34, and its connecting rod 32b is located at the rear of the press. Lower torsion mold holders 27a at the center of the crankshaft 24 are connected to the rear torsion beam 32 via attachment bodies 34, respectively. The arms 31a and 32a of the torsion beams 31 and 32 are connected to the connecting rods 31b and 3 on the moving bolster 19, respectively.
It is connected to a torsion hydraulic cylinder 35 installed at a position opposite to 2b. That is, the front torsion beam 31 is connected to the rear torsion hydraulic cylinder 35a.
The rear torsion beam 32 is connected to the front torsion hydraulic cylinder 35b, and each of the torsion beams 3
1 and 32 are rotated in opposite directions. Reference numeral 36 denotes a stopper provided on the upper part of the pair of supports 30 and at a position corresponding to the arms 31a, 32a of each torsion beam 31, 32. This is for setting. A compression spring 37 is attached to the stopper 36 so that the adjustment shim 38 can be replaced with a single touch. Further, the clamp device 22 of the moving bolster 19 has a groove 1 provided in the moving bolster 19, as shown in FIGS. 14 and 15.
It is comprised of a clamp body 39 that can be engaged with part 9a, and a hydraulic cylinder 40 that is fixed to the pressbed 14 and moves the clamp body 39 up and down. Therefore, by the hydraulic cylinder 40,
The moving bolster 19 is removably attached to the press bed 14. Reference numeral 41 denotes an adapter plate that holds the upper die 42 of the crankshaft 24, and is detachably attached to the lower surface of the slide 15 by clamp devices 43 provided at the front and rear of the slide 15.
The adapter plate 41 is provided with an upper die holder 44 corresponding to the lower die holder 27 . That is, as shown in FIG. 10, at positions corresponding to the lower torsion mold holders 27a and 27b, the torsion upper mold holders 44a and 44b are attached to the adapter plate 41 around the crank axis via the intermediate support 45. The part of the upper mold that cannot be twisted is held as it is by attaching it to the adapter plate 41.
is maintained. As shown in FIGS. 12 and 13, the torsional upper mold holders 44a and 44b follow the lower mold holders 27a and 27b when the lower mold holders 27a and 27b rotate. and rotated in the same direction. However, the upper die holder 4
4a and 44b are the lower mold holder 27 in the rotated position.
a, 27b, the upper mold holder 44a,
An upper die pull-back device 46 is provided for pulling back the molds 44b to their original positions. That is, teeth 47 are provided on the circular outer peripheral surfaces of the torsion upper mold holders 44a and 44b.
is engraved on the intermediate support body 45, and a rotary actuator 4 is provided on the intermediate support body 45 to rotate the torsion upper die holders 44a, 44b to their original positions via the teeth 47.
8 is supported via a pin 49. 50 is a driven gear interposed between the torsion upper die holders 44a, 44b and the rotary actuator 48;
The driven gear 50 is allowed to rotate freely in the torsional direction of the crankshaft 24, but is provided with a ratchet mechanism that transmits the rotation of the rotary actuator 48 in the retracting direction. Note that 51 is a tension spring for urging the rotary actuator 48 and the driven gear 50 toward the torsion upper mold holders 44a and 44b, and 52 is provided within the intermediate support 45 to bias the torsion upper mold holder 44a. , 44b along the circumferential direction. Further, the clamp device 43 of the adapter plate 41 includes a clamp body 53 that can be freely engaged and detached from a groove 41a provided in the adapter plate 41, as shown in FIGS. 16 and 17.
and a hydraulic cylinder 54 that operates the clamp body 53. The clamp body 53 is supported by a shaft 55 inserted into the boss 53a at an eccentric position, and
A protrusion 56 is provided on the extending portion 53b of 3a,
The hydraulic cylinder 54 is connected to the protrusion 56 . Therefore, in FIG. 17, when the hydraulic cylinder 54 is operated in the direction of arrow C, the clamp body 53 swings in the direction of arrow D while moving downward, thereby releasing the clamp.

Next, its operation will be explained. First, the crankshaft 24 is held on the moving bolster 19 via the lower mold 26, the lower mold holder 27, and the fixed bolster 3, and then the slide 15 is lowered to move the crankshaft 24 onto the upper and lower molds 42, 26. hold it completely. Next, each torsion beam 31, 32
are rotated in a predetermined direction and by a predetermined angle by operating their respective torsion hydraulic cylinders 35. Then, as shown in FIGS. 12 to 13, the crankshaft 24 has its both ends cranked by the crank portions 2.
5b in the counterclockwise direction, its central crank portion 25a
will be twisted clockwise. In addition, the 12th
In the figure and FIG. 13, an upper and lower type holder 27b,
The movement of 44b is shown. Then, the slide 15 may be raised to take out the crankshaft 24. The lower die 26 may be returned to its original position by the torsion hydraulic cylinder 35 via the torsion beams 31 and 32, and the upper die 42 may be returned to its original position by the rotary actuator 48.

Here, a case will be described in which the upper and lower torsion molds 42 and 26 are replaced. First, slide 15
After lowering the upper mold holder 44 and aligning it with the lower mold holder 27, remove the clamp of the adapter plate 41, and then remove the upper mold holder 44 and the adapter plate 4.
1 is placed on the lower mold side, that is, on the moving bolster 19. Next, by removing the clamp of the moving bolster 19 and pulling out the moving bolster 19 after pressing using the moving hydraulic cylinder 21, mold exchange can be easily and quickly performed outside the press. Moreover, if the mold is to be placed in a press, the above procedure may be reversed.

As described above, according to the crankshaft torsion press of the present invention, the upper die holder and the upper die pull-back device are provided on the adapter plate which is detachably attached to the slide, and the crankshaft torsion beam and the torsion cylinder device are mounted on the moving bolster. The upper and lower die exchange work can be done outside the press.
Therefore, mold replacement work can be performed extremely easily and quickly.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional examples.
The figure is a front view, Figure 2 is a side view, Figures 3 to 17 show an embodiment of the present invention, Figure 3 is a front view, Figure 4 is a side view, and Figure 5 is a torsional view. A front view of the device, FIG. 6 is the same plan view, and FIG. 7 is the − of FIG. 5.
8 is a view in the direction of the − arrow in FIG. 5, FIG. 9 is a plan view of the main part, FIG. 10 is a sectional view of the main part, FIG. The figure is an explanatory diagram of the operation, Figure 14 is an enlarged side view of the clamping device of the moving bolster, Figure 15 is a front view of the same, and Figure 1
FIG. 6 is a partially cutaway front view of the adapter plate clamping device, and FIG. 17 is a view taken along the - arrow in FIG. 16. 11... Crankshaft twisting press, 15... Slide, 19... Moving bolster, 23... Crankshaft twisting device, 24... Crankshaft, 27...
...Lower mold holder, 30...Support, 31, 32...
Torsion beam, 35...Torsion hydraulic cylinder, 4
1...Adapter plate, 44...Upper mold holder,
46... Upper die pullback device, 47... Teeth, 48...
Rotary actuator.

Claims (1)

[Claims] 1 In a press in which a crankshaft is twisted in a predetermined direction around its axis via its lower mold holder and torsion beam, the crankshaft torsion beam is twisted around the crankshaft by a pair of supports hanging vertically from both sides of the upper surface of the moving bolster. A cylinder device for rotating the torsion beam in the predetermined direction is provided on the moving bolster, and an adapter plate that can be attached and detached from the lower surface of the slide is provided with an upper mold holding device for crankshaft torsion. A crankshaft torsion press characterized in that a body is rotatably held around a crankshaft center and a rotating means is provided for rotating the upper mold holder.