JP5133943B2 - Twister - Google Patents

Description

  The present invention relates to a twister. More particularly, the present invention relates to a twister used for crankshaft forging.

Patent Document 1 is a representative document showing a general structure of a twister. The structure will be described with reference to FIGS.
The press frame includes a bed 101, an upright 102, and a connecting beam (or crown) 105. In the press frame, a slide 104 is arranged so as to be movable up and down, and a main cylinder 106 for raising and lowering the slide 104 is provided. A torsion mold 110 for torsion molding is installed on the bed 101, and a torsion cylinder 120 is attached to the upper part of the slide 104 via a guide body 125.

The twisting mechanism is configured as follows.
An upper rotation guide 108 is attached to the lower surface of the slide 104 via an upper die holder 118. A lower rotation guide 109 is attached to the upper surface of the bed 101 via a lower die holder 119.
The torsion mold 110 includes an upper mold 111 and a lower mold 112. The upper mold 111 is placed in the upper retainer 113 and is rotatably held by the upper rotation guide 108, and the lower mold 112 is placed in the lower retainer 114. The lower rotation guide 109 is rotatably held. A pressing arm 115 extends radially outward from the upper retainer 113.

Two push rods 131 on the front side and two on the rear side are connected to the lower end of the piston rod of the torsion cylinder 120 via a pressure block 123.
The lower ends of the front push rods 131 and 131 and the lower ends of the rear push rods 131 and 131 are connected to each other by a twist-down beam 132 and a twist-back beam 133.
The push-down arm 115 of the upper retainer 113 described above is fitted between the twist-down beam 132 and the twist-back beam 133. Accordingly, when the twisting cylinder 120 is extended, the twisting beam 132 is pushed down through the push rod 131, so that the twisting mold 110 can be twisted down. Further, when the torsion cylinder 120 is contracted, the torsion beam 133 is pulled up via the push rod 131, so that the torsion die 110 can be untwisted.

  By the way, the twisting position (or twisting angle) when twisting the crankshaft is different from two or three. However, as long as it is pushed down by the torsion cylinder 120, the stroke becomes the same. Therefore, in order to cope with the difference in torsional position, the pressing stroke is changed using a shim.

An example of a conventional twist mechanism will be described with reference to FIG.
A twist-down beam 132 is attached to the lower ends of the two left and right push rods 131. A twist back beam 133 is attached to both ends of the twist down beam 132 via a connecting rod 135. A large number of shims 138 for spacing adjustment are fixed to the lower surface of the torsion beam 132 with bolts 139. By changing the number of shims 138 attached, the push-down position can be changed and the torsion angle by the upper retainer 113 can be changed.

However, the conventional example has the following problems.
a) To change the push-down position, it is necessary to manually remove the bolts 139, increase or decrease the number of shims 138, and tighten the bolts 139 again. Since it is necessary to perform such heavy load work in a narrow die space, there is a problem that productivity is low.
b) The torsion cylinder 120 needs to be operated at a high speed because it is molded with the hot material closed, but since a hydraulic cylinder is used, a shock is generated at the stroke end, and vibration and noise are generated in the twister. There is a problem.
c) Even though the stroke required for torsion is relatively long, the number of torsion cylinders 120 is one, so that the torsion cylinder 120 is mounted above the slide 104 via the guide body 125, and the piston rod of the torsion cylinder 120 The distance from the torsion beams 132 and 133 is longer. For this reason, the pressurizing block 123 is required and the push bar 131 becomes long, so that the weight is heavy and the structure of the entire twister becomes complicated and large.
d) To assemble the torsion mechanism into the press body, after passing the push rod 131 through the guide member provided on the slide 104, the lower torsion beam 132 and the torsion beam 133 are assembled, and the upper pressure is applied. The block 123 and the push bar 131 are combined. In this case, the assembly work must be sequentially performed in the press main body, so that the assembly work is troublesome and the final mounting position and dimensions are also troublesome.

JP 2006-26687 A

  In view of the above circumstances, the present invention provides a twister that can accurately adjust the torsion angle, easily adjust the torsion angle, improve productivity, prevent the generation of vibration and noise, have a simple structure, and facilitate assembly work. The purpose is to provide.

A twister according to a first aspect of the present invention includes a retainer in which a torsion mold is inserted, a torsion mechanism for twisting a material by rotating the retainer, and a slide portion on which the torsion mechanism is provided. A lifting / lowering rod that moves up and down, a torsion beam that is provided at a lower end of the lifting rod and that extends from the retainer, and a lifting / lowering means for the lifting / lowering rod. a driving source, a screw rod which is rotated by the rotary drive source, and a nut screwed on the threaded rod, and wherein the lifting rod is coupled to said nut Rutotomoni, linear guide to said slide portion The elevating rod is guided by the linear guide to move up and down, the retainers are provided side by side, and the torsion mechanisms are attached to each of the torsion mechanisms. Rotator Characterized in that it comprises a servo motor as a source.
The twister according to a second aspect of the present invention is the twister according to the first aspect , wherein the slide portion includes a slide and a substrate, the substrate is attached to face the side surface of the slide, and each of the elevating means is the substrate. It is characterized by being attached to .
A twister according to a third aspect of the invention is characterized in that the linear guide is attached to both the left and right sides of the substrate, and the screw rod is disposed between them.
A twister according to a fourth aspect of the present invention is the twister according to the third aspect , wherein the elevating rod is assembled to a linear guide assembled to the substrate and a nut screwed to a screw rod, and the torsion beam is attached to the elevating rod. In addition, an attachment inlay that fits into an attachment portion formed on the slide is formed on the back surface of the substrate.

According to the first invention, the following effects are obtained.
a) When the screw rod is rotated from the rotational drive source, the nut moves on the screw rod, so that the elevating rod connected thereto moves up and down. The lifting stroke of the lifting rod can be controlled by the number of rotations of the rotational drive source, and the torsion position can be adjusted to an arbitrary position, and its fine adjustment can be performed. Further, vibration and noise can be prevented from occurring by controlling the number of rotations of the rotational drive source and performing a stop during the stroke or a gentle stop at the stroke end.
b) By driving the servo motor, the stroke amount, elevating speed, motion curve, timing, etc. can be changed freely, realizing an accurate stop position in the middle of the stroke, realizing a gentle stop at the stroke end, and shock and vibration It can be greatly reduced.
c) Since the two front and rear torsion mechanisms can be set to different strokes and motion curves, the adjustment time of the torsion position and accuracy between the front and rear torsion mechanisms can be greatly shortened.
According to the second invention, since the elevating means is mounted on the side surface of the slide portion, a stroke of the lifting means can be shortened from the lowered position of the slide only in the stroke required for twisting down. Therefore, the lifting means can be configured in a compact manner.
According to the third invention, since the linear guide guides the lifting operation of the lifting rod on both the left and right sides of the screw rod that generates the lifting power, there is no positional shift in the left and right direction, and all the molds are twisted with the same stroke. Can be molded.
According to the fourth invention, all the members of the torsion mechanism can be assembled on the basis of the substrate, so that the assembling work can be performed separately from the press main body, and the work becomes easy. Further, when a torsion mechanism is assembled on the substrate, when the mounting inlay is fitted to the mounting portion of the slide, the positioning for mounting can be performed, so that the accuracy of the mounting position can be improved and the mounting work can be facilitated.

It is the whole twister front view concerning one embodiment of the present invention. It is a whole side view of the twister concerning the embodiment. It is an enlarged front view of the twist mechanism in the twister of FIG. It is a side view of the twist mechanism of FIG. FIG. 4 is an enlarged cross-sectional view taken along line V in FIG. 3. FIG. 4 is a longitudinal sectional view taken along line VI in FIG. 3. It is the VII line longitudinal cross-sectional view of FIG. It is a front view of the twister of patent documents 1. It is a side view of the twister of patent documents 1. It is structure explanatory drawing of the conventional twist mechanism.

Next, an embodiment of the present invention will be described with reference to the drawings.
First, a basic configuration of a twister according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
Reference numeral 1 denotes a bed, and uprights 2 are erected on the front, rear, left and right sides. Each of the four uprights 2 is fastened to the bed 1 by a tie rod. The upper part of each upright 2, 2 is coupled to the crown 3. The bed 1, the upright 2, and the crown 3 constitute a press frame.

  A slide 4 is arranged in a space surrounded by front, rear, left, and right uprights 2 constituting the press frame, and a main cylinder 5 is attached to the crown 3 for moving the slide 4 up and down. Since the piston rod of the main cylinder 5 is connected to the slide 4, the slide 4 can be moved up and down by the main cylinder 5 so that the torsion mold 10, which will be described later, can be clamped open.

An upper rotation guide 7 is attached to the lower surface of the slide 4 via an upper die holder 6. A lower rotation guide 9 is attached to the upper surface of the bed 1 via a lower die holder 8.
The torsion mold 10 includes an upper mold 11 and a lower mold 12. The upper mold 11 is placed in an upper retainer 13 and is rotatably held by an upper rotation guide 7. The lower mold 12 is placed in a lower retainer 14. The lower rotation guide 9 is rotatably held.
A pusher arm 15 extends radially outward from the upper retainer 13. The pressing arm 15 extending to the right side in FIG. 2 extends to the back side of the paper in FIG. 1, and the pressing arm 15 extending to the left side in FIG. 2 extends to the front side of the page in FIG.

A twist mechanism 20 for twist forming is provided on the front and rear surfaces of the twister.
The torsion mechanism 20 is a mechanism that includes an elevating rod 21, a torsion beam 22 provided at the lower end thereof, and an elevating means 30 for the elevating rod 21, and rotates the upper retainer 13 during torsion molding.
Below, the detail of the twist mechanism 20 is demonstrated.

As shown in FIG. 3, the lifting / lowering rod 21 is a beam member that is long in the vertical direction.
The torsion beam 22 is composed of a torsion-down beam 23 formed at the lower end of the elevating rod 21 and extending laterally, and a torsion beam 24 extending laterally in parallel below the torsion beam. Both ends of the twist-back beam 24 are connected to both ends of the twist-down beam 23 by connecting plates 25.

  Further, as shown in FIG. 4, the twist-back beam 24 can be changed in posture between a downward connection position A and a lateral release position B by a rotary actuator 28. The push-down arm 15 is engaged with the torsion beam 22 when the torsion return beam 24 is at the coupling position A, and disengaged when the torsion return beam 24 is at the release position B.

Next, the raising / lowering means 30 which raises / lowers the said raising / lowering rod 21 is demonstrated based on FIGS.
Since the elevating means 30 has the same configuration in both the front and rear twist mechanisms 20, the front side will be described as a representative.
4 and 7, 4 is a slide, 5 is a main cylinder, and 3 is a crown. As shown in FIG. 7, the slide portion 54 has a slide 4 and a substrate 31, and an attachment structure for attaching the substrate 31 to the slide 4. The slide portion 54 includes the slide 4, the substrate 31, the bolt 44, the mounting portions 45 and 46, the upper inrow 51, the lower inrow 52, and the rib 53. The details are as follows.

A box-like assembly block 33 is formed on the upper end portion of the substrate 31, and a servo motor 34 as a rotational drive source is attached to the upper surface thereof.
On the other hand, a bearing 41 is attached to the lower plate of the assembly block 33 at the upper end of the substrate 31, and a bearing 42 is attached to the lower portion of the substrate 31. A screw rod 36 is rotatably supported by the two upper and lower bearings 41 and 42, and the upper end of the screw rod 36 and the main shaft of the servo motor 34 are coupled by a coupling 35. The coupling 35 is stored inside the assembly block 33.

As shown in FIG. 6, a linear guide 32 extending vertically is attached to the substrate 31 via a rail 39. Further, as shown in FIG. 5, two linear guides 32 are installed along the left and right side edges of the substrate 31 in parallel.
As shown in FIG. 5, the screw rod 36 is disposed between the left and right linear guides 32, 32. As shown in FIG. 7, a nut 37 is screwed onto the screw rod 36.

  As shown in FIGS. 5 and 6, the linear guide 32 has a slider 38 slidably attached thereto. Further, two sliders 38 are provided so as to be separated from each other in the vertical direction with respect to one linear guide 32. As shown in FIGS. 6 and 7, the elevating rod 21 is fixed to the four sliders 38. Further, the elevating rod 21 is also fixed to the nut 37. For this reason, when the servo motor 34 is rotated forward and backward, the lifting / lowering rod 21 moves up and down.

  As shown in FIG. 5, the elevating rod 21 is a U-shaped beam member having a front plate 21a and two side plates 21b at both ends thereof, and has high rigidity. A twist-down beam 23 and a twist-back beam 24 are provided at the lower part of the lifting rod 21 as described above. As shown in FIG. 6, the twist-down beam 23 includes a lower surface plate 23a and reinforcing ribs 23b on the upper surface thereof, and has sufficient strength. The untwisted beam 24 has a reinforcing plate 24b attached to the upper surface of the square pipe 24a, and this is also high in strength.

As shown in FIG. 7, an upper inrow 51 and a lower inrow 52 are formed on the back surface of the substrate 31 of the elevating means 30. The upper inlay 51 is a thick plate protruding to the back side, and is firmly fixed to the substrate 31 with triangular ribs 53. The lower inlay 52 is formed in a concave surface.
In the slide 4, an attachment portion is constituted by a tip portion of the thick plate 45 on the upper surface and a tip portion of the thick plate 46 on the lower surface.
The upper inrow 51 and the lower inrow 52 can be positioned by simply inserting them into the mounting portions 45 and 46 of the slide 4 from the front, and the bolts 44 are screwed into the thick plate 45 on the upper surface through the upper inrow 51, and another bolt 44 Is screwed into the thick plate 46 on the lower surface from the inner surface of the substrate 31, the substrate 31 can be fixed to the slide 4.

As described above, the lifting means 30 has all members such as the linear guide 32, the screw rod 36, and the nut 37 assembled to the substrate 31. The elevating rod 21 is assembled to the elevating means 30 via a nut 37 and a slider 38, and the torsion beam 20 is attached to the elevating rod 21.
Thus, since the twisting mechanism 20 can be assembled on the basis of the substrate 31, the twisting mechanism 20 can be attached to the press body by fixing the substrate 31 to the slide 4 after completion of the assembly.

  As shown in FIG. 5, in this embodiment, the linear guide 32 guides the lifting operation of the lifting rod 21 on both the left and right sides of the screw rod 36, so there is no positional shift in the left and right direction, and all the molds are the same. It can be twisted by stroke.

  In the present embodiment, a servo motor 34 is used as a rotational drive source for the lift 21. For this reason, it is possible to freely change the stroke amount, elevating speed, motion curve, timing, etc. by driving the servo motor, realizing an accurate stop position in the middle of the stroke, and slow stop at the stroke end, shock and vibration Can be eliminated.

  The front lifting / lowering rod 21 and the lifting / lowering means 30 of the twister body have been described above, but the rear lifting / lowering rod 21 and the lifting / lowering means 30 have the same configuration. Therefore, since the two front and rear torsion mechanisms can be set to separate strokes and motion curves, the adjustment time of the torsion position and accuracy between the front and rear torsion mechanisms can be greatly shortened.

  According to the twister of the above embodiment, when the screw rod 36 is rotated by the servo motor 34, the nut 37 moves on the screw rod 36, so that the lifting rod 21 connected thereto moves up and down. The lifting stroke of the lifting rod 21 can be controlled by the number of rotations of the servo motor 34, and the torsion position can be adjusted to an arbitrary position, and its fine adjustment can be performed. Therefore, there is no need for shim adjustment. Further, by controlling the number of rotations of the servo motor 34 and performing a stop during the stroke or a gentle stop at the end of the stroke, generation of vibration and noise can be prevented.

  Since the lifting / lowering means 30 is attached to the side surface of the slide 4, the stroke of the lifting / lowering means 30 can be shortened only from the lowered position of the slide 4 to the stroke required for twisting down. In other words, the structure in which the torsion cylinder is attached to the upper part of the slide as in the prior art increases the overall length, but in contrast, the elevating means 30 can be made compact.

In this embodiment, since all the members of the twisting mechanism 20 can be assembled based on the substrate 31, assembly work can be performed separately from the press body, and the work becomes easy.
Further, when the torsion mechanism 20 is assembled on the substrate 31, positioning can be performed by fitting the mounting inlays 51 and 52 to the mounting portions 45 and 46 of the slide 4, so that the accuracy of the mounting position is improved and mounting work is also performed. Easy to do.

20 Torsion mechanism 21 Lifting rod 31 Substrate 32 Linear guide 34 Servo motor 36 Screw rod 38 Slider

Claims (4)

A retainer containing the torsional-type, provided with a twisting mechanism for twisting molding materials rotate the retainer, and a slide portion which該捩mowing mechanism is provided, the,
該捩mowing mechanism comprises a lifting rod which moves up and down vertically, provided with a torsion beam which engages the pressing arm extending from said retainer provided at a lower end of該昇Fu杆, and a lifting means of the lifting rod,
The lifting means includes a rotation drive source comprises a threaded rod which is rotated by the rotary drive source, and a nut screwed on the threaded rod, and
Rutotomoni the lifting rod is coupled to said nut, a linear guide is provided on the sliding portion, the lifting rod are guided vertical movement by the linear guide,
Furthermore, the retainer is provided side by side and the torsion mechanism is attached,
Each of the twist mechanisms includes a servo motor as the rotational drive source . The slide part includes a slide and a substrate,
Wherein with opposing to the substrate is mounted each side of the slide, twister according to claim 1, wherein each of said lifting means, characterized in <br/> that is attached to the substrate. The twister according to claim 2 , wherein the linear guide is attached to both the left and right sides of the substrate, and the screw rod is disposed between the linear guides . The elevating rod is assembled to a linear guide and a nut screwed to the screw rod, and the torsion beam is attached to the elevating rod.
4. The twister according to claim 3 , wherein a mounting inlay that fits into a mounting portion formed on the slide is formed on a back surface of the substrate.

Images