JP3792809B2 - Origin positioning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece origin positioning device in a plate material processing machine such as a turret punch press.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an origin positioning device 101 in a plate material processing machine has an opening in a table 103 that supports a workpiece W, as shown in FIG. 6 showing an outline thereof, as disclosed in Japanese Utility Model Publication No. 56-30415. 105 is provided for projecting from the lower side to the opening 105 and for moving the workpiece W in the direction of the origin so as to attract the workpiece W on the table 103 and abut against a predetermined origin such as the locate pin 107. An electromagnet 109 is provided. A cylinder 111 that operates substantially parallel to the surface of the table 103 is provided below the table 103, and a cylinder 115 that operates vertically is fixed to the tip of the rod 113 of the cylinder 111. The electromagnet 109 is fixed to the tip of the piston rod 117 of the cylinder 115.
[0003]
The piston rod 117 rises from below the opening 105 of the table 103, and the work W on the table 103 is attracted by the electromagnet 109. Thereafter, the cylinder 111 is actuated to move the electromagnet 109 in a predetermined origin direction such as the locate pin 107, and the workpiece W is abutted against the locate pin 107, thereby positioning the origin.
[0004]
As disclosed in Japanese Utility Model Publication No. 7-31856 as another example, referring to FIG. 7 showing an outline thereof, a lifting cylinder 121 is fixed to the tip of a mounting arm 119 located above the table 103. The piston rod 123 of the elevating cylinder 121 can be raised and lowered from the upper side of the table 103 toward the surface of the table 103. At the lower end of the piston rod 123 of the elevating cylinder 121, a pulling cylinder 127 having a piston rod 125 that operates substantially parallel to the surface of the table 103 is provided. A suction pad 131 is provided at the tip of the piston rod 125 of the drawing cylinder 127 via a pad guide 129 so as to suck the work W on the table 103.
[0005]
A number of free bears 133 are provided on the surface of the table 103, and a locating pin 135 that is the origin position of the workpiece W is provided so as to be able to protrude and retract upward from the apex of the free bear 133.
[0006]
The workpiece W is transported by a workpiece loading unit (not shown) and placed on the free bear 133 of the table 103. The workpiece W on the free bear 133 is adsorbed by the adsorption pad when the piston rod 123 of the elevating cylinder 121 is lowered. Next, the pulling cylinder 127 moves the workpiece W in the direction of the origin so as to abut the workpiece W against the origin position of the locate pin 135. The workpiece W abutted against the locate pin 135 is clamped by the workpiece clamping device 137.
[0007]
After the suction pad 131 releases the workpiece W, the piston rod 123 of the elevating cylinder 121 rises and the pulling cylinder 127 returns to the original position, whereby the suction pad 131 returns to the original position.
[0008]
[Problems to be solved by the invention]
Conventionally, in the former origin positioning device 101, since the electromagnet 109 (adsorbing tool) is always in the opening 105 of the table 103, scraps, whiskers (string-like scraps), dust such as iron powder, sand, etc. Since the electromagnet 109 tends to accumulate on the attracting surface, there are problems such as reducing the attractability of the electromagnet 109 and scratching the workpiece W during the attracting.
[0009]
Further, the latter origin positioning device 101 has the following problems.
[0010]
Actually, in order to shorten the line tact of the plate material processing line, it is necessary to shorten each process tact of the machining line as much as possible, and the origin positioning process of the workpiece W is also a process that affects the line tact of the machining line. The latter origin positioning device 101 must increase the lifting stroke of the lifting cylinder 121 in order to avoid interference with the workpiece W loading unit. Therefore, there is a problem that it takes a long time for the origin positioning process.
[0011]
Further, for the reasons described above, there are problems that the cost of the origin positioning device 101 is high and it is difficult to save space.
[0012]
The present invention has been made to solve the above-mentioned problems, and its purpose is to shorten the time of the origin positioning process and to prevent the adhering material such as dust from adhering to the suction surface of the suction tool. is there.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the origin positioning device of the present invention according to claim 1 is capable of projecting from the lower side with respect to an opening provided in a table that supports a workpiece and attracting the workpiece on the table to move toward the origin. In the origin positioning device provided with an adsorbing tool for carrying out, the adsorbing tool is provided so as to be movable to a position corresponding to the opening and a retracted position retracted from directly below the opening. It is.
[0014]
Therefore, when positioning the workpiece on the table at the origin, the suction tool is moved from the retracted position to a position corresponding to the opening, the workpiece sucked by the suction tool is moved in the origin direction, and the workpiece is positioned at the origin. After the positioning of the origin is completed, the suction tool is moved to the retreat position where the suction tool is retracted from directly below the opening, so that it is difficult for deposits such as dust to adhere to the suction surface of the suction tool.
[0015]
In addition, since this origin positioning device is located below the table, it does not interfere with the workpiece loading unit for loading and unloading the workpiece onto and from the table. Planning and space saving.
[0016]
According to a second aspect of the present invention, there is provided an origin positioning device according to the first aspect, further comprising a cleaning device for cleaning the suction surface of the suction tool located at the retracted position. is there.
[0017]
Therefore, since the suction surface of the suction tool is constantly cleaned by the cleaning device, the suction performance of the suction tool to the workpiece is ensured and the reliability is improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an origin positioning device in a plate material processing machine of the present invention will be described with reference to the drawings, taking a punch press as an example of the plate material processing machine.
[0019]
4 and 5 show the entire punch press 1, for example, according to this embodiment. In FIG. 4, a base frame 5 having a generally gate-shaped main body 5 having a cap G at the center is erected on the base 3. A pair of lower guide rails 9 are provided in the Y-axis direction on the upper surface of the lower frame 7 which is the lower end of the gap G in the main body frame 5. Similarly, a pair of upper guide rails 13 are provided in the Y-axis direction on the lower surface of the upper frame 11 which is the upper end of the gap G in the main body frame 5.
[0020]
Referring to FIG. 5, tables 15 are extended in the X-axis direction on both the front and rear sides (left and right in FIG. 5) of the main body frame 5. The table 15 is provided with a carriage 19 having a clamp 17 for clamping the workpiece W. The X axis is guided along the X axis guides 21 provided on both the left and right sides (up and down in FIG. 5) of the table 15. It can be moved and positioned in any direction.
[0021]
Referring to FIG. 4 again, a die block frame 25 is supported on the lower guide rail 9 by a lower guide member 23 so as to be movable in the Y-axis direction. A die block 27 having a large number of dies D is detachably provided on the die block frame 25.
[0022]
A punch block frame 31 is supported on the upper guide rail 13 by an upper guide member 29 so as to be movable in the Y-axis direction. A punch block 33 having a large number of punches P is detachably provided on the punch block frame 31.
[0023]
The die block frame 25 and the punch block frame 31 are integrally connected by a C-shaped frame 35 which is a connection frame. Therefore, the die block frame 25 and the punch block frame 31 are always integrally moved and positioned in the Y-axis direction.
[0024]
A Y-axis ball screw 37 is rotatably provided in the main body frame 5 by a Y-axis drive motor 39 while penetrating in the Y-axis direction. The Y-axis provided in the right portion of the main body frame 5 in FIG. The punch block frame 31 is moved and positioned in the Y-axis direction along the upper guide rail 13 by the action of the ball nut 41. At the same time, the die block frame 25 connected by the C-shaped frame 35 is also moved and positioned in the Y-axis direction.
[0025]
On the other hand, the punch block frame 31 is provided with a punch cylinder 43 that can be moved and positioned in the U-axis direction (the same direction as the X-axis direction) and the V-axis direction (the same direction as the Y-axis direction). 43 is equipped with a striker 45 for hitting the punch P.
[0026]
Since it is configured as described above, when punching a workpiece W, the workpiece W is positioned at the machining position, and the Y-axis ball screw 37 is rotated by the Y-axis drive motor 39 so as to punch the punch block frame 31. In addition, the die block frame 25 is moved and positioned integrally in the Y-axis direction.
[0027]
At the same time, the punch cylinder 43 is moved and positioned above the desired punch P, and punching is performed by hitting the punch P via the striker 45 by the punch cylinder 43.
[0028]
A hydraulic circuit is provided for operating the punch cylinder 43. That is, in the hydraulic circuit, a hydraulic hose (not shown) is connected to the punch cylinder 43 via an accumulator and a manifold from a hydraulic pressure generation source (not shown) provided on the ground or the body frame 5.
[0029]
Next, the origin positioning device 49 as a main part as an example of the embodiment of the present invention will be described in detail.
[0030]
Referring to FIG. 5, the table 15 on the front side (right side in FIG. 5) of the main body frame 5 is provided with an origin positioning device 49 for positioning the workpiece W at the origin.
[0031]
Referring to FIG. 3 which is an enlarged view of this portion, a large number of free bears 51 are provided on the upper surface of the table 15 described above, and the free bears 51 of the table 15 are provided on the front side of the table 15 in the work loading direction. An X-axis locating pin 53 that can be moved upward and downward from the apex is provided. A plurality of Y-axis locating pins 55 are provided on the left side (lower side in FIG. 3) of the work loading direction of the table 15, and three second to fourth Y-axis locating pins 55 in the example of the present embodiment are the upper surface of the table 15. Is provided to protrude.
[0032]
Further, a plurality of origin positioning devices 49, which are located in the vicinity of the plurality of Y-axis locating pins 55, in the example of the present embodiment, three origin positioning devices 49 are provided.
[0033]
Referring to FIGS. 1 and 2, the table 15 is provided with an opening 57 penetrating downward, and is located near the opening 57 and supports the origin positioning device 49 below the table 15. A support member 59 is provided. The support member 59 has a bent plate shape in the example of the present embodiment, and a cylinder holding member 63 for holding the pulling cylinder 61 is disposed on the upper surface of the support member 59 through a swinging bearing 65 in a substantially horizontal plane. It is provided so that it can rotate freely. A piston rod 67 of the pulling cylinder 61 is fixed to the upper surface of the cylinder holding member 63 so as to expand and contract in a substantially horizontal direction.
[0034]
At the tip of the piston rod 67, there are provided a pad lifting guide 71 for guiding the suction pad 69 (suction tool) to be raised and lowered and a pad lifting cylinder 73 for raising and lowering the suction pad 69. The suction pad 69 is configured such that the suction surface 75 can protrude upward from the apex of the free bear 51 on the upper surface of the table 15 from below the opening 57 of the table 15. And a position retracted from a position directly below the opening 57.
[0035]
More specifically, the rear end portion of the cylinder holding member 63 is pulled in the opposite direction with respect to the position immediately below the opening 57 via the spring 77, and therefore the suction pad on the front end side of the cylinder holding member 63. 69 is located immediately below the opening 57.
[0036]
Further, a bracket 79 is fixed to the upper surface of the pulling cylinder 61 with a bolt, and a connecting tool 81 having an L-shaped cross section is pivotally attached to the bracket 79 so as to be rotatable in a horizontal plane. The axial center of the connecting tool 81 is located at a position away from the rotational axis of the swinging bearing 65 described above.
[0037]
Further, the tip of the piston rod 87 of the retraction cylinder 85 is attached to the vertical piece 83 of the connector 81, and the rear end of the retraction cylinder 85 is the suction pad with the pulling cylinder 61 as a fulcrum about the axis of the swinging bearing 65. 69 is fixed to the support member 59 so as to be able to move from a position directly below the opening 57 to a retracted position retracted below the table 15.
[0038]
Further, in order to clean the suction surface 75 of the suction pad 69 that has been moved to the position retracted below the table 15 as described above, cleaning of the air nozzle 89 and the like for air blowing dust and other deposits on the suction surface 75. A device 91 is provided. The cleaning device 91 may be a device for cleaning with a wiper made of a cleaning tool such as a brush, or may be another cleaning device, and is not particularly limited.
[0039]
Further, in the example of the embodiment described above, the suction pad 69 is used as the suction tool. However, other suction tools such as an electromagnet can be used, and the suction tool can suck and release the workpiece. There is no particular limitation.
[0040]
With the above configuration, the workpiece W is clamped by the clamp 17 of the carriage 19 and is transported on the free bear 51 of the table 15 by the travel of the carriage 19. When the tip of the workpiece W comes close to the X-axis locating pin 53, the carriage 19 stops traveling, and the clamp 17 releases the workpiece W.
[0041]
The suction pad 69 of each origin positioning device 49 is already waiting directly under the opening 57, and the suction pad 69 is sucked through a pipe communicating with the suction surface 75 and is in a suckable state. When the pad lifting cylinder 73 is raised, the suction pad 69 is raised and sucks the workpiece W. At this time, the lift stroke of the pad lifting cylinder 73 is small.
[0042]
Next, the piston rod 67 of the pulling cylinder 61 moves forward and moves the workpiece W sucked by the suction pad 69 in a direction to abut against the X-axis locating pin 53 and the Y-axis locating pin 55. Since the drawing cylinder 61 is supported by the swinging bearing 65 via the cylinder holding member 63, the edge of the workpiece W is positioned at the X-axis locating pin 53 and the Y-axis locating pin 55 while the drawing cylinder 61 rotates freely in a horizontal plane. The head is positioned securely and the origin is positioned.
[0043]
The workpiece W positioned at the origin is clamped by the clamp 17, and then the drawing cylinder 61 releases the workpiece W and the pad lifting cylinder 73 is lowered to return the drawing cylinder 61 to the original position.
[0044]
The workpiece W clamped by the clamp 17 is conveyed to the processing portion of the punch press 1 and processed.
[0045]
While the workpiece W is being processed, the suction pad 69 of each of the origin positioning devices 49 moves from a position directly below the opening 57 to a position where it is retracted. That is, when the retracting cylinder 85 is operated, the pulling cylinder 61 rotates in the clockwise direction in FIG. 1 with the shaft center of the swinging bearing 65 as a fulcrum against the urging force of the spring 77, and the suction pad 69 is also in the table 15. Rotate to the retracted position below.
[0046]
The tip of the piping nozzle 89 of the cleaning device 91 is directed to the suction surface 75 of the suction pad 69 at the retraction position of the suction pad 69, and dust or the like on the suction surface 75 is ejected from the air nozzle 89. The deposits can be reliably removed.
[0047]
When the suction pad 69 is returned to just below the opening 57, the piston rod 87 of the retracting cylinder 85 moves forward so that the drawing cylinder 61 is swung by the urging force of the spring 77 via the cylinder holding member 63. With the axis of the bearing 65 as a fulcrum, it rotates counterclockwise in FIG. 1 and the suction pad 69 returns to just below the opening 57.
[0048]
In addition, this invention is not limited to the example of embodiment mentioned above, It can implement in another aspect by making an appropriate change. In the example of the present embodiment, the punch press has been described as an example of the plate material processing machine, but other press processing machines and other plate material processing machines may be used.
[0049]
【The invention's effect】
As can be understood from the example of the embodiment as described above, according to the invention of claim 1, when positioning the work on the table at the origin, the suction tool is moved to a position corresponding to the opening of the table. The suction tool is lifted with a small stroke to suck the workpiece, and the suction tool is moved in the direction of the origin to position the workpiece at the origin, so that the process time can be shortened. After the positioning of the origin is completed, the suction tool is moved to a position retracted from directly below the opening, so that it is difficult for deposits such as dust to adhere to the suction surface of the suction tool.
[0050]
In addition, since this origin positioning device is located below the table, it does not interfere with the workpiece loading unit for loading and unloading the workpiece onto and from the table. It is possible to save space.
[0051]
According to the second aspect of the present invention, since the suction surface of the suction tool is always cleaned by the cleaning device, the suction performance of the suction tool with respect to the workpiece can be ensured, and the reliability can be improved.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of the present invention and is a plan view of an origin positioning device.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 shows an example of an embodiment of the present invention, and is a plan view of the entire three origin positioning devices.
FIG. 4 is a front view of a punch press used in an example of an embodiment of the present invention.
FIG. 5 is an overall plan view of a punch press used in an example of an embodiment of the present invention.
FIG. 6 is a schematic diagram of a conventional origin positioning device.
FIG. 7 is a schematic view of another conventional origin positioning device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Punch press 5 Main body frame 11 Upper frame 15 Table 35 C type frame 43 Punch cylinder (hydraulic equipment)
45 Strike 49 Origin Positioning Device 53 X-axis Locate Pin 55 Y-axis Locate Pin 57 Opening 61 Pulling Cylinder 65 Oscillating Bearing (fulcrum)
69 Suction pad (Suction tool)
73 Pad Lifting Cylinder 75 Adsorption Surface 85 Retraction Cylinder 89 Air Nozzle 91 Cleaning Device

Claims (2)

In an origin positioning device that includes an adsorbing tool that can project from the lower side with respect to an opening provided in a table that supports a workpiece and that attracts the workpiece on the table and moves it in the origin direction.
An origin positioning device characterized in that the suction tool is provided so as to be movable to a position corresponding to the opening and a retracted position retracted from directly below the opening. 2. The origin positioning device according to claim 1, further comprising a cleaning device for cleaning the suction surface of the suction tool located at the retracted position.

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