JPS6229135Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a twisting device for a crankshaft twisting press.

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. A lower mold 2 for torsion forming the crankshaft of this press 1 is carried out by a hydraulic cylinder 6 which is mounted on a fixed bolster 3 and is also attached to a press bed 5 via a torsion beam 4. However, in recent years, efforts have been made to facilitate and speed up the press mold replacement work, and with this, it is desirable to replace the lower mold of this press outside the press, but the hydraulic cylinder of the crankshaft twisting device mentioned above is Since it has drawbacks such as being attached to the press bed side, it has not been possible to replace the lower die outside the press.

The present invention provides a twisting device for a crankshaft twisting press that eliminates the above-mentioned drawbacks, and one embodiment of the present invention will be described below with reference to FIGS. 3 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
(See Figure 1) 24 is such that its central crank portion 25a is twisted, for example, in the rear direction A of the press, and the crank portions 25b at both ends thereof are twisted at a predetermined angle in the front direction B of the press. Lower mold holder 27 corresponding to parts 25a and 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 a pair of front and rear torsion beams 31, 32 so as to be rotatable around the crankshaft. Each of the pair of torsion beams 31, 32 is configured in a gate shape, as shown in FIGS. 5 to 10, and its arms 31a, 32
A shaft 33 is inserted through the a end and rotatably supported by the support 30, and its connecting rods 31b,
32b 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 respectively attached to the connecting rods 31b and 32b via attachment bodies 34. connected. That is, the lower torsion mold holders 27b at both ends of the crankshaft 24 are connected to the front torsion beam 31, whose connecting rod 31b is located at the front of the press, via the attachment body 34, and the connecting rod 32b A lower torsion die holder 27a located at the center of the crankshaft 24 is connected to the rear torsion beam 32, which is located at the rear of the press, 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 32b on the moving bolster 19, respectively.
It is connected to a torsion hydraulic cylinder 35 installed at a position opposite to 32b. That is, the front torsion beam 31 is connected to the rear torsion hydraulic cylinder 35.
In a, the rear torsion beam 32 is connected to the front torsion hydraulic cylinder 35b, so that the torsion beams 31 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, as shown in FIGS. 14 and 15, the clamp device 22 of the moving bolster 19 includes a clamp body 39 that can be engaged with a groove 19a provided in the moving bolster 19, and is fixed to the press bed 14. It is comprised of a hydraulic cylinder 40 that moves the clamp body 39 up and down. Therefore, the hydraulic cylinder 40 allows the moving bolster 19 to move against the press bed 14.
The top is removable. 41 is crankshaft 2
An adapter plate that holds the upper die 42 of 4, and a clamp device 43 provided at the front and rear of the slide 15.
Therefore, it can be attached to and detached from the lower surface 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, the upper torsion mold holders 44a and 44b are placed at positions corresponding to the lower torsion mold holders 27a and 27b.
As shown in FIG. 10, the adapter plate 41 is rotatably held by the adapter plate 41 via an intermediate support 45, and the upper part of the mold that is not twisted is attached to the adapter plate as it is. 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. Reference numeral 50 denotes a driven gear interposed between the torsional upper die holders 44a, 44b and the rotary actuator 48, and the driven gear 50 is allowed to rotate freely in the torsional direction of the crankshaft 24. A ratchet mechanism for transmitting the rotation of the rotary actuator 48 is provided in the retracting direction. In addition, 51 is a tension spring for biasing the rotary actuator 48 and the driven gear 50 toward the torsion upper mold holders 44a and 44b, and 52 is a tension spring provided in the intermediate support 45 to urge the torsion upper mold holder 44a and 44b. It is a roller that guides 44a and 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 actuated 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 and the crankshaft 24 is held by the upper and lower molds 42, 26. hold completely. Next, each torsion beam 31, 32 is
Each torsion hydraulic cylinder 35 is operated to rotate in a predetermined direction and by a predetermined angle. Then, as shown in FIGS. 12 to 13, the crankshaft 24 has both end crank portions 25b twisted counterclockwise and its central crank portion 25a clockwise. Note that FIGS. 12 and 13 show upper and lower holding bodies 27b and 44b used when twisting the crank portions 25b at both ends of the crankshaft 24.
movement is shown. Then, the slide 15 may be raised to take out the crankshaft 24. Note that the lower mold 26 is connected to the upper mold 42 by a torsion hydraulic cylinder 35 via each torsion beam 31 and 32.
can be returned to its original position using 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 to the rear of the press using the moving hydraulic cylinder 21, mold exchange can be easily and quickly performed outside the press. Also, when placing the mold in the press,
The above procedure can be performed in reverse.

As described above, according to the torsion device for the crankshaft torsion press according to the present invention, since the torsion beam of the crankshaft and the hydraulic cylinder for torsion thereof are provided on the moving bolster, the work of replacing the lower mold for torsion of the crankshaft is simplified. This can be done outside the press, and therefore the lower mold replacement work can be done 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 torsion 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. DESCRIPTION OF SYMBOLS 11... Crankshaft torsion press, 15... Slide, 19... Moving bolster, 23... Crankshaft torsion device, 24... Crankshaft, 27... Lower die holder, 30... Support body, 31, 32... Torsion beam, 3
5... Hydraulic cylinder for torsion, 41... Adapter plate, 44... Upper die holder, 46... Upper die pullback device, 47... Teeth, 48... Rotary actuator.

Claims (1)

[Scope of utility model registration request] A pair of supports are vertically disposed on both sides of the upper surface of the moving bolster, and a torsion beam for twisting the crankshaft in a predetermined direction via a lower mold holder is provided on the pair of supports so as to be freely rotatable around the crankshaft, A torsion device for a crankshaft torsion press, characterized in that a cylinder device for rotating the torsion beam in the predetermined direction is provided on the moving bolster.