JP3986005B2 - Pressed product reversing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press-worked product reversing device for reversing a work that is a press-worked product in a press working line.
[0002]
[Prior art]
In a press processing line, there is a case where a workpiece in the middle of processing is reversed and conveyed to the next process in the middle of the processing line. In such a case, a reversing device is used.
[0003]
In this conventional reversing device, for example, as disclosed in Japanese Patent Laid-Open No. 55-1000083, a pair of clamps that clamp a workpiece, a clamp drive unit that moves the clamps apart and moves closely, and a workpiece on which the workpiece is placed Some include a receiving member, an elevating drive unit that moves the work receiving member up and down, and a reversing drive unit that simultaneously rotates the pair of clamps 180 degrees.
[0004]
In the operation of the reversing device, as shown in the time chart of FIG. 6, first, a pair of clamps clamp (clamp) the workpiece placed on the workpiece receiving member by the clamp driving unit. The workpiece receiving member is lowered (the table is lowered) by the elevating drive unit. Next, the pair of clamps are rotated 180 degrees by the reversing drive unit to reverse (reverse) the workpiece. The workpiece receiving member is raised (table raised) by the elevating drive unit. Then, the pair of clamps releases (unclamps) the workpiece by the clamp driving unit, and places the workpiece on the workpiece receiving member.
[0005]
By the way, in this reversing device, the work receiving member is lowered (table lowered) before the work is reversed (reversed) by the reversing drive unit, and the work receiving member is lifted (table raised) before the work is released (unclamped) by the clamp drive unit. This is an indispensable operation.
[0006]
Further, in order to perform the descending and ascending operations of the ascending / descending drive unit, for example, air pressure control is performed on each pneumatic device such as an air cylinder and an electromagnetic valve by a sequencer.
[0007]
[Problems to be solved by the invention]
Therefore, in the case of this reversing device, since the raising / lowering drive part of the workpiece receiving member is required, for example, an operation time for raising and lowering the air cylinder is required, and it takes several seconds to connect the control signals of each pneumatic device and the like. Accordingly, the drive control time of the entire reversing device is accumulated in the operation time of the entire press processing, and as a result, the productivity of the press-processed product is hindered.
[0008]
The present invention has been made to solve the above-described problems, and its purpose is to raise and lower a table that lowers the table before reversing the workpiece, which is a press-processed product, and raises the table before releasing the workpiece. An object of the present invention is to provide a pressed product reversing device that saves operation and improves the productivity of pressed products in a press processing line.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, according to the present invention, as described in claim 1, a table capable of moving up and down for placing a work as a press-worked product, and a chuck for grasping the work placed on the table. And a reversing drive part reversing device that rotates the chuck 180 degrees around a horizontal support shaft parallel to the workpiece placement surface, wherein the chuck is along the workpiece placement surface of the table. It consists of approaching to and separating from the operable pair of claws Te, the table is urged upwardly so as to abut from below the chuck, either pawl pivots Thus the pair of the chuck Is in contact with the workpiece placement surface and moves up and down.
[0010]
In this press-work product reversing device, the chuck is composed of a pair of left and right claws that can move toward and away from each other along the workpiece mounting surface of the table. The table comes into contact with the work placement surface and moves up and down. Further, the table is urged upward so as to come into contact with the chuck from below, and moves up and down in conjunction with the rotation of the chuck, so that the chuck is in contact with the work placement surface while holding the work. It will rotate and turn the work.
[0011]
Therefore, in this press-work product reversing device, the table is not lowered before the workpiece is reversed, or the table is not raised before the workpiece is released. Reduces the overall operation time of the press work and improves the productivity of the press work.
[0012]
Further, according to the present invention, a sliding member is pivotally attached to each of the pair of claws, and a guide rail is provided on a sliding contact surface of the table with the sliding member. It is characterized by that.
[0013]
Here, examples of the sliding member include a hard resin having a low friction coefficient that can be pivotally attached to the nail, and examples of the guide rail include a hard resin having a low friction coefficient similar to that of the sliding member.
[0014]
Since this sliding member slides smoothly on the guide rail of the table, the rotational force of the reversing drive unit that rotates the chuck is reduced.
The guide rail protects the sliding surface of the table from wear due to sliding contact with the sliding member.
[0015]
Therefore, in this press-work product reversing device, the sliding member facilitates the linkage between the rotation of the chuck and the lifting operation of the table, and the guide rail provides robustness to the sliding surface of the table. A stable workpiece reversing operation can be repeated without wear on the contact surface, and the press work product reversing device can be used for a longer time.
[0016]
In particular, when the sliding member is constituted by a rotating roller such as a bearing as in claim 3, the rotating roller rolls along the guide rail when the chuck rotates. The sliding frictional resistance between them is small, the table can be smoothly moved up and down with respect to the rotation of the chuck, and the power for rotating the chuck may be small. Therefore, even if the rotating roller and the guide rail are made of metal in order to ensure durability and robustness, there is no possibility that the sliding contact portion is worn away.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail based on examples.
[0018]
1 to 4 show a first embodiment of the present invention, FIG. 1 is a front view showing the overall configuration of a press-work product reversing apparatus, FIG. 2 is a plan view of the apparatus, and FIG. 3 is a right side view of the apparatus. 4 and 4 are time charts of the workpiece reversing operation.
[0019]
The press-work product reversing device 10 is disposed in the concave portion D of the die set C in the die sets B and C installed on the bolster A of the press machine.
[0020]
The press-work product reversing device 10 includes a table 20 positioned at a press-working line center CL (see FIG. 2) for delivering the workpiece W, and a clamp of the workpiece W on the table 20 by driving the chuck driving unit 31. A chuck 30 that performs unclamping, a reversing drive unit 40 that rotates the chuck 30 180 degrees around a horizontal support shaft X (see FIG. 1) parallel to the workpiece placement surface 21 of the table 20, and chuck driving And the drive source 50A, 50B of the reversing drive unit 40, and is erected on the base 11 and the reversing device mounting base 12 which are stacked and fixed on the bottom surface of the recess D of the die set C.
[0021]
The table 20 is supported by a piston-type air cushion 22 (air spring-type piston cylinder) that can move up and down in the vertical direction and always applies an urging force upward, and is erected on the reversing device mounting base 12. Yes.
[0022]
When viewed in plan as shown in FIG. 2, the table 20 has a quadrilateral shape having a workpiece placement surface 21, the center of the workpiece placement surface 21 coincides with the press processing line center CL, and the workpiece of the table 20. A work guide pin 23 projects from the center of the mounting surface 21.
[0023]
In addition, a circular recess (concave groove) 24 (see FIG. 1) in which the inverted workpiece W can be engaged is formed in the workpiece mounting surface 21 with the workpiece guide pin 23 as a center.
In this case, the work W has a bowl shape opened upward, and a positioning hole W1 is formed at the center of the work bottom surface, and the positioning hole W1 engages with the work guide pin 23 of the work placement surface 21. It has a shape.
[0024]
Further, on both side edges of the table 20 along the press line direction L of the workpiece mounting surface 21, a material different from the material of the table 20, for example, a hard resin having a low coefficient of friction is made of Teflon (registered trademark) resin or the like. Configured guide rails 25a and 25b are provided.
[0025]
Further, a piston type air cushion (air spring type piston cylinder) 22 that supports the table 20 is fixed vertically to the reversing device mounting base 12 and has an air piston 26 that fixedly supports the table 20 so as to be movable up and down. The cylinder 27 and the piston guide rod 28 attached to the air cylinder 27 are configured. Then, an upward biasing force of a predetermined size is always applied to the table 20 by the air cushion 22, and the table 20 is below the uppermost end position (position indicated by symbol H in FIG. 1) approaching the lower surface of the chuck 30. It is configured to be able to move up and down.
[0026]
The chuck 30, the chuck drive unit 31, the reverse drive unit 40, and the drive sources 50 </ b> A and 50 </ b> B of the chuck drive unit 31 and the reverse drive unit 40 are mounted on the reverse device main body 13.
[0027]
The chuck 30 can grip both sides of the workpiece W placed on the workpiece placement surface 21 of the table 20 and can be moved toward and away from the workpiece placement surface 22. And a chuck drive unit 31 for operating the claws 32a and 32b, and the chuck drive unit 31 is arranged so as to be orthogonal to the press processing line direction L.
[0028]
Rotating rollers 33a, 33b, 33c, 33d such as ball bearings are respectively attached to the pair of claws 32a, 32b, and each of the rotating rollers 33a, 33b, 33c, 33d is a pair of guide rails 25a on the table 20 side. , 25b in contact with each other.
[0029]
Further, the pair of claws 32 a and 32 b projecting from the front portion of the chuck driving unit 31 moves toward and away from each other by driving the chuck driving unit 31 to clamp and unclamp the workpiece W.
[0030]
The chuck drive unit 31 is connected to the reversal drive unit 40 and supported by a bracket 52 that is a part of the apparatus main body 13 together with the reversal drive unit 40.
[0031]
That is, the chuck driving unit 31 and the reversing driving unit 40 are arranged so that the horizontal support shaft X parallel to the workpiece mounting surface 21 is located above the bracket 52 of the apparatus main body 13 erected at a right angle to the reversing device mounting base 12. It is connected and fixed in series on (see FIG. 1).
[0032]
Further, as shown in FIG. 1, the position of the chuck driving unit 31 and the reverse driving unit 40 is adjusted in the vertical direction by the vertical adjustment mechanism unit 53 attached to the upper end of the bracket 52 as shown in FIG. It is possible.
[0033]
The reversal drive unit 40 is composed of a rotary actuator, and is connected so that the chuck drive unit 31 is rotated 180 degrees by an output shaft (not shown).
[0034]
The chuck drive unit 31 and the reverse drive unit 40 are driven by a chuck drive unit drive source 50 </ b> A and a reverse drive unit drive source 50 </ b> B fixed to the reverse device mounting base 12. Then, when the chuck 30 (the claws 32a and 32b) is rotated around the horizontal support shaft X by the reverse drive unit 40 (see the arrow A in FIG. 3), the chuck 30 (the claws 32a and 32b) is pressed (see the white arrow A in FIG. 3). ) And the table 20 descends. That is, the table 20 moves up and down in conjunction with the rotation of the chuck 30 while maintaining the form in contact with the chuck 30 from below.
[0035]
The chuck driving unit 31 and the inversion driving unit 40 are connected to a working fluid pipe (not shown), and are disposed in the chuck driving unit driving source 50B and the inversion driving unit driving source 50A.
[0036]
As shown in FIG. 2, the press work product reversing device 10 having such a configuration is located between the process dies E and F provided in the press process line direction L, and the process dies are not shown by a work conveying robot (not shown). The workpiece W is delivered from E to the table 20.
[0037]
The workpiece W transferred to the table 20 is engaged with the workpiece guide pins 23 on the workpiece placement surface 21 and is positioned on the press processing line center CL on the table 20.
[0038]
When the workpiece W is delivered, the pair of claws 32a and 32b are opened in the left-right direction apart by the working fluid fed from the chuck drive unit drive source 50B to one port (not shown) of the chuck drive unit 31. It is in a state.
[0039]
The table 20 is urged by a piston-type air cushion 22 from below, and the guide rollers 25a of the table 20 are always attached to the rotating rollers 33a, 33b, 33c, and 33d that are pivotally attached to the pair of claws 32a and 32b. , 25b are held in contact with each other.
[0040]
At this time, the pair of claws 32a, 32b are moved in parallel with respect to the workpiece W while the rotating rollers 33a, 33b, 33c, 33d roll on the guide rails 25a, 25b, and sandwich the workpiece W. grab.
[0041]
Next, when the work W is reversed (reversed) and the working fluid is supplied from the reversing drive unit drive source 50 </ b> A to the reversal drive unit 40, the chuck drive unit 31 is rotated 180 by an output shaft (not shown) of the reversal drive unit 40. Rotation, that is, the pair of claws 32a and 32b rotate 180 degrees (the work is reversed) in a state where the work W is gripped.
[0042]
At this time, the rotating rollers 33a and 33b of the one claw 32a push down the table 20 while rolling along the guide rails 25a and 25b of the workpiece placement surface 21 (see arrow B in FIG. 3) (see the white arrow in FIG. 3). reference). The table 20 is moved up and down (the work is reversed) in conjunction with the rotation of the chuck 30 while maintaining the form in contact with the rotating rollers 33a and 33b with a constant urging force.
[0043]
That is, the table 20 is moved from the state where it is pushed down against the biasing force of the piston type air cushion 22 by the rotation of the chuck 30 to the piston type as the rotation of the chuck 30 exceeds 90 degrees and reverses 180 degrees. The air cushion 22 is lifted by the urging force from below.
[0044]
Then, when the driving of the reversing drive unit 40 is finished and the reversing operation of 180 degrees of the chuck driving unit 31 is finished, the rotating rollers 33a and 33b exchange the rotating rollers 33c and 33d with their sliding contact positions, and the workpiece W is It reverses and engages with the work guide pin 23 of the work placement surface 21 to fit into the circular recess 24.
[0045]
Next, the workpiece W is released (unclamped), and the working fluid is supplied from the chuck driving unit drive source 50B to one port (not shown) of the chuck driving unit 31, and the pair of claws 32a and 32b is supplied by the working fluid. Moves apart in the left-right direction to release the workpiece W.
[0046]
The inverted workpiece W is between the stroke dies E and F provided in the press working line direction L, and is transferred from the workpiece placement surface 21 of the table 20 to the stroke die F by a workpiece transfer robot (not shown). Delivered.
[0047]
As described above, in the press-work product reversing apparatus 10, as shown in the timing chart of FIG. 4, the work W is gripped by the claws 32a and 32b (clamp). The rotating rollers 33a and 33b of the claws 32a and 32b move along the guide rails 25a and 25b of the table 20 while lowering and raising the table 20, thereby reversing the workpiece W (reversing). Then, the workpiece W can be released (unclamped) by separating the claws 32a and 32b on the workpiece placement surface 21 of the raised table 20.
[0048]
Therefore, according to this press-processed product reversing device 10, there is no need for a drive control system for lowering the table 20 before reversing the workpiece W or raising the table 20 before releasing the workpiece W. The structure is concise. Further, since it is not necessary to control the lifting / lowering operation of the table 20, the operation of the press-work product reversing device 10 can be saved to reduce the drive control time of the entire device, and thus the operation time of the press work line can also be shortened. Productivity of press-processed products can be improved.
[0049]
Furthermore, in this embodiment, the rotating rollers 33a, 33b, 33c, and 33d facilitate the linkage between the rotation of the claws 32a and 32b of the chuck 30 and the lifting and lowering operation of the table 20, and the guide rails 25a and 25b are connected to the table 20. Since the slidable contact surface is made to be robust, the slidable contact surface with the rotating roller on the work placing surface 21 is not worn, and a stable work reversing operation can be repeated.
[0050]
The first embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0051]
For example, in the above-described first embodiment, the workpiece W to be reversed has a bowl shape opened upward, and in order to reverse the workpiece W, the press work product reversing device 10 clamps, reverses, As shown in FIG. 5, when the work W to be reversed has a long shape as shown in FIG. 5, clamping, reversing and unclamping are performed by the two press-work product reversing devices 10A and 10B. These operations can be reversed.
[0052]
In this case, the two press-work product reversing devices 10A and 10B include the tables 20A and 20B that support the long workpiece W, the chucks 30A and 30B, the chuck driving units 31A and 31B, and the reversing driving units. 40A, 40B, and each apparatus main body 13A, 13B equipped with each chuck drive unit 31A, 31B and each drive source 50c, 50d, 50e, 50f of each reversal drive unit 40A, 40B are connected in series on the press processing line center CL. It is installed on the floor so as to be positioned in Further, these press-work product reversing devices 10A and 10B are oriented so that the chucks 30A and 30B gripping both longitudinal ends of the long workpiece W face each other.
[0053]
Each table 20A, 20B is always held in an urging contact with each chuck 30A, 30B from below by an air cushion (not shown).
[0054]
One rotary roller 33a, 33b (33c, 33d) is pivotally mounted on the base side of the claws 32a, 32b (32c, 32d) of the chuck 30A (30B), and the rotary rollers 33a, 33b (33c, 33d) 33d), the guide rail 25a (25c) of the table 20A (20B) abuts from below. Then, when the claws 32a and 32b (32c and 32d) are rotated in such a manner that both ends of the work W are gripped, the table 20A (20B) pushed by the rotating rollers 33a and (33c) moves up and down. At this time, the rotating rollers 33a and (33c) roll on the guide rail 25a (25c).
[0055]
In addition, you may install each apparatus main body 13A, 13B on a floor surface so that it may become a perpendicular | vertical direction with respect to the press work line center CL.
[0056]
Then, each operation of clamping, reversing and unclamping the long workpiece W by the two press-work product reversing devices 10A and 10B is performed on both ends of the workpiece W in the longitudinal direction with the chucks 30A and 30B (the claws 32a and 32b, 32c and 32d), the tables 20A and 20B are moved up and down in conjunction with the 180 degree rotation of the chucks 30A and 30B in a state of gripping the workpiece W, and the workpiece W is reversed (reversed). The workpiece clamps by the chucks 30A, 30B (the claws 32a, 32b, 32c, 32d) are released (unclamped).
[0057]
It should be noted that clamping, reversing and unclamping of the workpiece W by the chucks 30A and 30B needs to be configured to be performed synchronously. Others are the same as those in the above-described embodiment, and the same reference numerals are given to omit redundant description.
[0058]
In the above-described embodiment, the rotating rollers 33a, 33b, 33c, and 33d are axially attached to the chuck claws 32a and 32b. However, the sliding member is axially attached, and the sliding member is placed on the guide rail of the table. It may be configured to slide, and there is no problem if it is prepared that the sliding friction resistance between the chuck (sliding member) and the table (guide rail) is slightly increased when the chuck is rotated.
[0059]
Moreover, in the above-mentioned Example, the press work product inversion apparatus 10 of this invention is the die set B and C installed on the bolster A of the press machine, between the metal mold | die arrange | positioned in the recessed part D of the die set C. Although the present invention is applied to a press-work product reversing device in workpiece conveyance, the present invention may be installed between a press machine and a press machine in a press secondary processing line.
[0060]
【The invention's effect】
As described above, according to the present invention, as described in claim 1, the chuck is composed of a pair of left and right claws that can move toward and away from each other along the work placement surface of the table. from below the chuck is urged upward so as to contact, since either of the pawl pivots Thus the pair of right and left chuck moves up and down abuts on the workpiece placement surface, the table before work turning or downward movement, there is no need to rise operating table before a work release, reduces the driving control time of the entire apparatus, thus shortens operating time of the entire press processing is to improve the productivity of stampings .
[0061]
According to the second aspect of the present invention, the sliding member is pivotally attached to each of the pair of claws, and the guide rail is provided on the sliding contact surface with the sliding member of the table. Smooth coordination between rotation and table up / down movement, guide rails provide robustness to the sliding surface of the table, and stable workpiece reversing operation can be repeated without wearing the sliding surface. Long-term use is possible as a workpiece reversing device.
[0062]
According to the third aspect, since the sliding frictional resistance between the rotating roller and the guide rail when the chuck is rotated is very small, the work can be smoothly reversed with low power consumption.
[0063]
[Brief description of the drawings]
FIG. 1 is a front view showing an overall configuration of a press-work product reversing apparatus according to a first embodiment of the present invention.
FIG. 2 is a plan view of the apparatus.
FIG. 3 is a right side view of the apparatus.
FIG. 4 is a time chart of a workpiece reversing operation.
FIG. 5 is a plan view of a press-work product reversing apparatus according to a second embodiment of the present invention.
FIG. 6 is a time chart of a workpiece reversing operation in a conventional press-work product reversing apparatus.
[Explanation of symbols]
W Workpiece (Press processed product)
L Press processing line direction CL Press processing line center 10, 10A, 10B Press processed product reversing device 13, 13A, 13B Device main body 20 Table 21 Workpiece mounting surface 25a, 25b Guide rail 30 Chuck 31 Chuck drive unit 32a, 32b Claws 33a, 33b, 33c, 33d Rotating roller 40 Reverse drive unit 50A Chuck drive source 50B Reverse drive unit drive source

Claims (3)

A table that can be moved up and down to place a workpiece, which is a press-worked product, a chuck that grips the workpiece placed on the table, and the chuck that rotates 180 degrees around a horizontal support shaft that is parallel to the workpiece placement surface. In the press work product reversing device including the reversing drive unit to be moved, the chuck includes a pair of left and right claws capable of moving toward and away from the work placement surface of the table, and the table is disposed below the chuck. abut to as being biased upward, moldings reversing device either pawl pivots Thus the pair of the chuck, characterized in that the lifting operation abuts against the workpiece placement surface from .   2. The press-worked product according to claim 1, wherein a sliding member is pivotally attached to each of the pair of claws, and a guide rail is provided on a sliding contact surface of the table with the sliding member. Inversion device.   The press-work product reversing device according to claim 2, wherein the sliding member is a rotating roller.

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