JP4842165B2 - Connecting rodless press - Google Patents

Description

  The present invention relates to a connecting rodless press.

A forging press that is generally used includes a connecting rod that connects an eccentric shaft and a slide, and the rotation of the eccentric shaft is converted into a vertical movement of the slide by the connecting rod.
However, since the connecting rod has a certain length, the press becomes higher by the length of the connecting rod. Therefore, a connecting rodless press not using a connecting rod has been developed (for example, Patent Document 1).

  A typical connecting rodless press is shown in FIGS. As shown in FIGS. 6 and 7, a general connecting rodless press uses a crank or full eccentric type eccentric shaft 101, and extrapolates a cylindrical eccentric member 102 around the outer periphery of the eccentric portion 101e. It has a structure in which a slide 103 is extrapolated to the outer periphery. Therefore, when the eccentric shaft 101 is rotated, the eccentric member 102 swings and rotates, and the slide 103 can be moved up and down.

The connecting rodless press as described above is usually employed in a press that performs molding in a small number of steps. This is due to the following reasons.
The width of the slide in the press is determined by the number of steps and the width of the mold in each step. When multi-step molding is performed, the width of the slide becomes wider as the number of steps increases, and the width of the eccentric member also becomes wider. Therefore, the weight of the eccentric member becomes very large and the weight of the driven system increases. As a result, the drive system and braking mechanism must be increased in size and output, resulting in a loss of compactness of the press and an increase in running cost. Therefore, the connecting rodless press is usually employed only for a press that performs molding in a small number of steps.

JP-A-60-174232

  In view of the above circumstances, an object of the present invention is to provide a connecting rodless press capable of maintaining compactness and preventing an increase in running cost even when employed in multi-step forging.

In the connecting rodless press according to the first aspect of the invention, a swinging member is rotatably fitted on the outer periphery of the eccentric part of the eccentric shaft, and the swinging member swings in a sliding chamber formed on a slide in which a mold is disposed. A connecting rodless press fitted freely, wherein a plurality of the swinging members are provided in the sliding chamber, and the plurality of swinging members are spaced apart from each other in the axial direction of the eccentric shaft. Row are disposed, characterized in that the eccentric portion and one of said slide one of the eccentric shaft by the swinging member of the plurality is connected.
The connecting rodless press according to a second aspect of the present invention is characterized in that, in the first aspect, the plurality of swinging members include swinging members having different widths.
The connecting rodless press according to a third aspect of the present invention is the first aspect of the present invention, wherein the eccentric member is disposed between the swinging member and the eccentric portion of the eccentric shaft so as to be rotatable relative to the eccentric member, and rotates the eccentric member. A shut height adjusting mechanism comprising rotating means for rotating, and the rotating means of the shut height adjusting mechanism is disposed between the plurality of swinging members.

According to the first invention, the load from the slide can be received at a wide range and transmitted to the eccentric shaft, so that a structure resistant to the eccentric load can be obtained. Moreover, even if the width of the slide is increased, the width of each swing member can be reduced. Then, since the weight increase of a driven system can be suppressed, the compactness of a press can be maintained and the increase in running cost can also be suppressed.
According to the second aspect of the present invention, if the widths of all the swinging members are not made uniform and the widths are adjusted according to the load applied to each swinging member, a structure resistant to eccentric load can be obtained. The driven system can be reduced in weight and size.
According to the third aspect, if the eccentric member is rotated, the center of the eccentric member moves up and down, and the slide moves up and down according to the rotation of the eccentric member, so that the shut height can be changed. Further, since only the eccentric member is disposed between the swing member and the eccentric portion of the eccentric shaft, the height of the press can be suppressed, and the press can be prevented from being enlarged. Moreover, since the rotating means is disposed between the swinging members, it is not necessary to provide a special space for installing the rotating means, so that the press can have a simple structure.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic front view of a connecting rodless press according to the present embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a view taken along the line III-III in FIG. 1 of FIG.

In FIG. 1, a press 1 has a frame 2, a bed 3, and four tie rods 4 connecting them.
An eccentric shaft 5 is attached to the frame 2. The eccentric shaft 5 is provided with an eccentric portion 5a at the central portion in the axial direction. The eccentric shaft 5 is provided with a pair of coaxial parts 5b, 5b so as to sandwich the eccentric part 5a, and the pair of coaxial parts 5b, 5b are rotatably supported by the frame 2.
A slide 7 is attached to the eccentric portion 5 a of the eccentric shaft 5. The slide 7 is formed with a sliding chamber 7h penetrating between the left and right surfaces in FIG. 1, and is formed so as to accommodate the eccentric portion 5a in the sliding chamber 7h.
The eccentric shaft 5 is connected to a drive mechanism such as a speed reducer, and a braking mechanism such as a clutch and a brake is also attached.

  As shown in FIGS. 2 and 3, the eccentric portion 5 a of the eccentric shaft 5 is provided with a pair of swing members 6 and 6 that are disk-shaped members. The pair of swinging members 6 and 6 are inserted into the sliding chamber 7h of the slide 7 so as to be able to slide and rotate. That is, the eccentric portion 5 a of the eccentric shaft 5 and the slide 7 are connected via the pair of swing members 6 and 6.

  With the above configuration, the eccentric shaft 5 rotates when the drive mechanism is operated, and when the eccentric shaft 5 rotates, the pair of swing members 6 and 6 swing and the slide 7 moves up and down. Therefore, if the upper mold and lower mold of the multi-process mold M are respectively disposed on the bottom surface of the slide 7 and the upper surface of the bed 3, the forging material is sandwiched between the upper mold and lower mold of the multi-process mold M. Can do.

Further, as shown in FIG. 3, the pair of swing members 6, 6 has a width W <b> 2 narrower than a width W <b> 1 of the slide 7. The pair of swinging members 6 and 6 are arranged side by side in the axial direction of the eccentric shaft 5 in a state of being spaced apart from each other.
Then, when a load from the slide 7 is applied, the load can be received at a wide position and transmitted to the eccentric shaft 5, so that a structure strong against an eccentric load can be obtained.
Moreover, since the swing member 6 can be reduced in weight as compared with the case where the swing member 6 has the same width as the slide 7, the weight of the driven system including the swing member 6 can be suppressed. Then, the drive system and the braking mechanism can be reduced in size and output.

Furthermore, in the case of the press according to the present embodiment, even if the width W1 of the slide 7 is increased, it is not necessary to increase the size of the individual swinging members 6 more than necessary. In other words, regardless of the width W1 of the slide 7, it is only necessary to form the individual swinging members 6 to a width necessary for maintaining the strength thereof. Then, even if the width W1 of the slide 7 is increased, it is possible to suppress an increase in size and weight of the swing member 6, and thus it is possible to suppress an increase in the weight of the driven system including the swing member 6.
Therefore, even if the press according to the present embodiment is used in a multi-step press in which the width W1 of the slide 7 is wide, it is possible to prevent the drive system and the braking mechanism from increasing in size and output. Can be maintained, and an increase in running cost can be prevented.

  Further, in FIG. 3, the pair of oscillating members 6 and 6 have the same width W2, but the widths of both may be different. When a multi-step mold is attached to the slide 7, the molding load is different for each mold, and in the width direction of the slide 7 (the horizontal direction in FIG. 3), for example, the molding load by the mold located on the left side is on the right side. It may be larger than the molding load by the located mold. In such a case, it is preferable that the width of the swinging member 6 positioned on the left side is wider than the width of the swinging member 6 positioned on the right side. That is, if the width of each swing member 6 is adjusted according to the load applied to each swing member 6, the weight of all the swing members 6 can be reduced, and the structure is stronger against the eccentric load. be able to.

  Further, in FIG. 3, the pair of swing members 6, 6 are disposed symmetrically with respect to the press center CL, but the pair of swing members 6, 6 are appropriately disposed on the left and right with respect to the press center CL. What is necessary is just to be arrange | positioned in the position. And if it arrange | positions in the right-and-left appropriate position with respect to the press center CL, since the load from the slide 7 can be transmitted to the eccentric shaft 5 with good balance, it will be made a structure stronger against the eccentric load. be able to.

  The number of swing members 6 is not limited to two, but may be three or more, and the number is not particularly limited. Even when two or more oscillating members 6 are provided, if the widths of all the oscillating members 6 are not made uniform and the width of each oscillating member 6 is adjusted according to the load applied to each oscillating member 6, eccentricity is obtained. The structure can withstand a load, and the driven system can be reduced in weight and size.

  Furthermore, although the case where the disk-shaped rocking member 6 is employed has been described in the above embodiment, the rocking member 6 and the slide 7 are not limited to the above-described structure. The swing member and the slide may be formed in such a structure that when the eccentric shaft 5 rotates, the swing member swings and the slide 7 moves up and down along with the swing.

  Further, a shut height adjusting mechanism 50 may be provided in the connecting rodless press as described above.

FIG. 4 is a schematic front view of a connecting rodless press provided with a shut height adjusting mechanism, and FIG. 5 is a view taken along line VV in FIG.
As shown in FIGS. 4 and 5, an eccentric member 51 of the shut height adjusting mechanism 50 is provided between the swing member 6 and the outer periphery of the eccentric portion 5 a of the eccentric shaft 5. This eccentric member 51 has a center of an outer peripheral surface (surface in contact with the swinging member 6) and a center of an inner peripheral surface (surface in contact with the eccentric portion 5a) in a cross section orthogonal to the axial direction (left-right direction in FIG. 4). It is an eccentric sleeve. In the eccentric member 51, a gear 51g is provided along the outer peripheral surface of a portion located in the space between the pair of swinging members 6 and 6.

  A rotating means 52 is provided in a portion located in the space between the pair of swing members 6 and 6. The rotating means 52 includes a driving device 52a such as a servo motor and a pinion gear 52b. The driving device 52a is fixed to the swing member 6, and a pinion gear 52b is attached to the main shaft thereof. The pinion gear 52b meshes with the gear 51g of the eccentric member 51. That is, the reduction mechanism is formed by the pinion gear 52b and the gear 51g of the eccentric member 51.

  Therefore, if the drive device 52a is operated, the pinion gear 52b and the gear 51g rotate, and the eccentric member 51 can be rotated around the eccentric portion 5a of the eccentric shaft 5. When the eccentric member 51 rotates, the center of the eccentric member 51 moves up and down, and the swing member 6 moves up and down with respect to the eccentric portion 5a. In other words, the swing member 6 moves up and down with respect to the slide. Then, since the slide 7 moves up and down in accordance with the vertical movement of the swing member 6, the shut height can be changed.

  Further, since only the eccentric member 51 is disposed between the swing member 6 and the eccentric portion 5a, the length of the press in the mechanism connecting the eccentric shaft 5 and the slide 7 is increased. Can be prevented. Therefore, even if the shut height adjusting mechanism 50 is provided, the height of the press can be suppressed, so that an increase in size of the press can be prevented.

  In addition, since the rotating means 52 is disposed in the space between the pair of swing members 6 and 6, it is not necessary to provide a special space for installing the rotating means 52 on the slide 7 or the like. Therefore, the slide 7 and the like can be prevented from increasing in size, so that the press can be prevented from increasing in size, and the press can have a simple structure.

In addition, the structure which rotates the eccentric member 51 is not restricted to the above structures. For example, a configuration may be employed in which a rack that meshes with the gear 51g is provided, and the eccentric member 51 is rotated by advancing and retreating the rack by a driving device such as a cylinder, or the eccentric member is rotated by a worm and a worm wheel. Moreover, it is good also as a structure which provided the nut part provided with the screw hole orthogonal to the axial direction of the eccentric shaft 5 in the eccentric member, and screwed the screw shaft in this nut part. In this case, since the nut portion can be moved in the screw shaft direction by rotating the screw shaft, the eccentric member can be rotated.
Furthermore, the driving device 52a of the rotating means 52 is not limited to a servo motor, and may be a hydraulic motor or a hydraulic cylinder, and is not particularly limited.

It is a schematic front view of the connecting rodless press of this embodiment. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. 1 of FIG. It is a schematic front view of the connecting rodless press provided with the shut height adjustment mechanism. FIG. 5 is a view taken along line VV in FIG. 4. It is a front view of the connecting rodless press of the prior art example 1. It is a VII-VII arrow line view of FIG.

DESCRIPTION OF SYMBOLS 1 Press frame 5 Eccentric shaft 5a Eccentric part 6 Oscillating member 7 Slide 7h Sliding chamber 50 Shut height adjustment mechanism 51 Eccentric member 52 Rotating means

Claims (3)

A connecting rodless press in which a swinging member is rotatably fitted on the outer periphery of the eccentric part of the eccentric shaft, and the swinging member is swingably fitted in a sliding chamber formed in a slide in which a mold is disposed. Because
A plurality of the oscillating members are provided in the sliding chamber, and the plurality of oscillating members are arranged side by side in the axial direction of the eccentric shaft while being spaced apart from each other. a connecting rod-less press, wherein a an eccentric portion and one of said slide one of the eccentric shaft are linked by a member. The connecting rodless press according to claim 1, wherein the plurality of swing members include swing members having different widths. An eccentric member disposed between the swinging member and the eccentric portion of the eccentric shaft so as to be rotatable with respect to both;
A shut height adjusting mechanism comprising a rotating means for rotating the eccentric member;
2. The connecting rodless press according to claim 1, wherein a rotating means of the shut height adjusting mechanism is disposed between the plurality of swinging members.

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