JP4398002B2 - Punch press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punch press.
[0002]
[Prior art]
In general, in the turret punch press, as shown in FIG. 12, the die D is at the upper part in the die holder 101, and the die holder 101 is supported by the lower turret 103 so that the upper surface of the die D is at the same height as the pass line PL. Has been. Then, by rotating the lower turret 103, the predetermined die D is indexed to the processing position A1, and the lower portion of the die holder 103 to which the predetermined die D is attached is supported by the disk support 105, and the punch mold P and the die D are Work W is processed by cooperation.
[0003]
[Problems to be solved by the invention]
However, in such a conventional turret punch press, since the upper surfaces of all the dies D mounted on the lower turret 103 via the die holder 101 are at the same height as the pass line PL, the workpiece W is moved to the lower turret. When moving horizontally above 103, there is a problem in that the back surface of the workpiece W also comes into contact with the die D other than the processing position A1 and is damaged.
[0004]
On the other hand, in the one described in Japanese Utility Model Publication No. 3-111417, the lower turret is provided at a position lower than the pass line, and a die is provided on the lower turret by providing a table in the pass line on the lower turret except directly below the ram. Concealed under the table, only the die directly under the ram is lifted up to the pass line by the cylinder. According to this prior art, the back surface of the work is supported by the table and does not contact the die, so that it is not damaged, but the die lifting cylinder must be able to withstand the load during processing.
[0005]
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a punch press capable of horizontally moving a workpiece without bringing the back surface of the workpiece into contact with a die other than the machining position. To do.
[0006]
[Means for Solving the Problems]
In the punch press according to the first aspect of the present invention, a plurality of die holders are attached to the peripheral edge of the rotationally supported lower turret so that the die holders can be moved up and down, and the die is attached to each of the plurality of die holders so that the upper surface is slightly lower than the work pass line. A holder support member that is mounted so as to be positioned, supports a bottom surface of one of the die holders slightly pushed up at a predetermined processing position, and aligns the top surface of the die attached to the die holder with a pass line of the workpiece. When the lower turret is rotated to move one of the die holders to the processing position, a slope that guides the slope to slide onto the upper surface of the holder support member by sliding the lower surface of the die holder is provided. It was formed on the side of
[0007]
In the punch press according to the first aspect of the present invention, in the normal state, the upper surface of each die is located slightly lower than the pass line of the workpiece, and when the predetermined die is indexed to the processing position by rotating the lower turret, By sliding the lower surface of the die holder, to which the predetermined die is attached, on the slope and riding on the upper surface of the holder support member, the upper surface of the predetermined die is made to be flush with the pass line at the processing position. Thereby, since the upper surface of the die other than the processing position is at a position lower than the pass line, the workpiece can be moved horizontally without bringing the back surface of the workpiece into contact with the die other than the processing position.
[0008]
Further, in the punch press of the invention of claim 1, is provided with the locking mechanism for securing the die holder to a predetermined position of the upper surface of the holder support member, when machining a workpiece in a processing position, a predetermined die machining It is possible to prevent displacement from occurring.
[0012]
Furthermore, in the punch press according to the first aspect of the present invention, when the die holder is positioned at a predetermined position on the upper surface of the holder support member, the V-shaped support block is raised to an appropriate position near the side surface of the die holder by the support block cylinder. The shot pin is inserted into the shot pin bush of the die holder by the shot pin cylinder, so that the predetermined die can be accurately positioned at the processing position, and the predetermined die is processed at the processing position. It is possible to prevent deviation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a first embodiment of the present invention, and FIG. 2 is a side view thereof. The punch press 1 of this embodiment is based on a bridge-type main body frame 3, and the main body frame 3 includes an upper frame 5 and a lower frame 7 facing each other up and down.
[0014]
An upper turret 11 having a plurality of punch dies P is provided at the front part of the upper frame 5 (the lower part in FIG. 1 and the left part in FIG. 2). A lower turret 13 having D is provided so as to face the upper turret 11 in the vertical direction. The upper turret 11 and the lower turret 13 are rotated by a turret rotation motor 15 built in the lower frame 7, and each predetermined set of the punch die P and the die D can be indexed to the processing position A1.
[0015]
As shown in FIG. 2, a ram 17 is provided above the upper turret 11 to press a predetermined punch die P indexed to the machining position A1 from above. It is driven by the operation of a cylinder 19 provided in the cylinder.
[0016]
As shown in FIGS. 1 and 2, the lower frame 7 is provided with a work table 21 that supports a plate-like work W. A carriage base 23 extending in the left-right direction (the left-right direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2) is provided at the rear portion of the work table 21, and the carriage base 23 includes a motor 25. By driving, it can move in the front-rear direction (vertical direction in FIG. 1 and left-right direction in FIG. 2). The carriage base 23 is provided with a carriage 29 provided with a plurality of clampers 27 for gripping the end of the workpiece W. The carriage 29 can be moved in the left-right direction by driving a motor 31. With these mechanisms, the workpiece W gripped by the clamper 27 can move two-dimensionally.
[0017]
3 is a plan view of the die positioning and fixing device 33 at the processing position A1, FIG. 4 is a cross-sectional view taken along the line AA ′ shown in FIG. 3, and FIG. 5 is a side view seen from the direction of arrow B shown in FIG. The die positioning and fixing device 33 holds the outer periphery of the die D and is supported by the die holder 35 supported by the lower turret 13 so as to be movable in the vertical direction, and the die holder 35 placed on the upper surface at a predetermined position A2 at the processing position A1. The support 37 and the lock device 39 for fixing the die holder 35 to a predetermined position A2 on the upper surface of the disk support 37 are configured.
[0018]
3 to 5, three turret keys 41 provided on the lower turret 13 are formed on the side of the die holder 35 so that the direction of the die holder 35 does not change even when the die holder 35 moves up and down. The three turret key grooves 43 are engaged with each other.
[0019]
As shown in FIG. 5, the die holder 35A in the normal state is supported by the lower turret 13 so that the upper surface of the die D held on the die holder 35A is positioned at a height lower than the pass line PL. The upper surface of the disk support 37 is a flat surface at a predetermined position A2 that is directly below the ram 17 shown in FIG. 2, and when the die holder 35 is positioned above the predetermined position A2, Are set so that the upper surface of the die D held at the same height as the pass line PL.
[0020]
Further, the front and rear positions (right and left positions in FIG. 5) of the upper surface of the disk support 37 in the direction of the arrow C1 of the predetermined position A2 are slopes 45A and 45B that gently fall from the predetermined position A2. Then, lower tapered surfaces 47A and 47B are formed at both front and rear end portions (right and left end portions in FIG. 5) in the arrow C1 direction on the lower surface of the die holder 35, respectively. When the die holder 35 is moved in the direction of the arrow C1 by rotating the lower turret 13 and indexed to the processing position A1, the die holder 35 is guided to the predetermined position A2 by engaging the tapered surface 47A with the slope 45A. When the die holder 35 is further moved from the predetermined position A2 in the direction of the arrow C1, the lower tapered surface 47B of the die holder 35 slides down the slope 45B and is guided to the normal state (the same height as the die holder 35A). .
[0021]
In the present embodiment, the inclination angles of the slopes 45A and 45B and the lower tapered surfaces 47A and 47B with respect to the horizontal plane are set to 7 °. However, the respective inclination angles are not necessarily 7 ° as long as the lower taper surfaces 47A and 47B and the slopes 45A and 45B are well engaged and the die holder 35 can be smoothly moved between the predetermined position A2 and its front and rear positions. Not necessary.
[0022]
As shown in FIGS. 3 and 4, the locking device 39 includes tapered surfaces 49 </ b> L and 49 </ b> R formed on both side surfaces of the die holder 35 in the radial direction of the lower turret 13 (left and right directions in FIGS. 3 and 4), Chuckes 53L and 53R having tapered pressing surfaces 51L and 51R corresponding to the respective shapes of the tapered surfaces 49L and 49R, and lock cylinders 55L and 55R for moving the chucks 53L and 53R up and down are provided.
[0023]
As shown in FIG. 4, a key 57 for fixing the position of the chuck 53L is provided on the pressing surface 51L of the chuck 53L provided on the center side of the lower turret 13 (left side in FIG. 4). A keyway 59 for inserting the key 57 is formed in the tapered surface 49L of the die holder 35 on the same side. The chucks 53 </ b> L and 53 </ b> R are provided so as to be positioned on the side portions of the tapered surfaces 49 </ b> L and 49 </ b> R of the die holder 35 in a state where the die holder 35 is located at the predetermined position A <b> 2 on the upper surface of the disk support 37.
[0024]
Then, by contracting the piston rods 61L and 61R of the lock cylinders 55L and 55R, the pressing surfaces 51L and 51R of the chucks 53L and 53R are pressed by the tapered surfaces 49L and 49R, respectively, and at the same time, the key 57 of the pressing surface 51L is pressed. Inserted in the groove 59, the die holder 35 can be fixed at a predetermined position A2 on the upper surface of the disk support 37.
[0025]
In the present embodiment, the key 57 for fixing the position is projected from the pressing surface 51L of the chuck 53L, and the key groove 59 for inserting the key 57 is formed in the tapered surface 49L of the die holder 35. However, a key 57 for fixing the position is projected on the pressing surface 51R of the other chuck 53R, and a key groove 59 for inserting the key 57 is formed on the taper surface 49R of the die holder 35 on the chuck 53R side. You may make the structure to form.
[0026]
Next, the operation of the punch press of this embodiment will be described. First, as shown in FIGS. 1 and 2, the turret rotation motor 15 is driven to rotate the upper and lower turrets 11 and 13, and each predetermined set of the punch die P and the die D is indexed to the processing position A 1. A predetermined die D is fixed to the processing position A1 by the die positioning and fixing device 33. Detailed operations of indexing and fixing the predetermined die D to the processing position A1 will be described later.
[0027]
Next, a plate-like workpiece W is carried onto the workpiece table 21 and the origin is abutted, and the workpiece W is gripped by the clamper 27. Next, the workpiece W is moved two-dimensionally by driving the motors 25 and 31, and is positioned between the upper turret 11 and the lower turret 13 at the machining position A1.
[0028]
Next, the ram 17 is lowered by the operation of the cylinder 19, and a predetermined punch die P is pressed by the ram 17 from above. As a result, a predetermined punching die P and a predetermined die D are cooperated to punch the workpiece W. This processing may be performed on the same workpiece W at several places and several types. When the machining of the workpiece W is completed, the workpiece W is separated from the machining position A1 by the mechanism described above, and the machined workpiece W is released from the clamper 27.
[0029]
The above-described indexing of the predetermined die D to the processing position A1 is performed as follows. FIG. 6 is a diagram illustrating an operation when the die holder 35 holding the predetermined die D is indexed to the processing position A1. As indicated by a position a in FIG. 2, the die holder 35 in the normal state is supported by the lower turret 13 so that the upper surface of the die D held on the die holder 35 is located at a lower level than the pass line PL.
[0030]
When indexing the die holder 35 at the position a to the processing position A1, first, the lower turret 13 is rotated, and the die holder 35 is moved in the direction of the arrow C1. Then, as indicated by a position b, the die holder 35 slides on the lower tapered surface 47A while engaging the slope 45A, and is guided to the machining position A1. The height of the die holder 35 is gradually pushed upward by the slope 45A as it approaches the processing position A1.
[0031]
When the die holder 35 is moved to the predetermined position A2 on the upper surface of the disk support 37 as indicated by the position c, the rotation of the lower turret 13 is stopped. As a result, the die D held by the die holder 35 is positioned at the processing position A1, and the upper surface of the die D has the same height as the pass line PL.
[0032]
When the die holder 35 is thus positioned at the predetermined position A2, the die holder 35 is fixed at the predetermined position A2 by the lock device 39 shown in FIGS. And the workpiece | work W is processed by the operation | movement mentioned above.
[0033]
When another die D is determined at the processing position A1, first, the position fixing of the used die holder 35 at the position c shown in FIG. 6 by the lock device 39 is released. Then, the lower turret 13 is rotated to move the used die holder 13 in the direction of the arrow C1. Then, as shown by the position d, the die holder 35 after use slides on the lower taper surface 47B while engaging with the slope 45B, and moves away from the processing position A1. Further, the height of the die holder 35 after use is gradually lowered by its own weight as it is away from the processing position A1. When another die holder 35 is indexed to the predetermined position A2, the height of the die holder 35 after use returns to the normal state as indicated by the position e.
[0034]
In this way, only the die D indexed to the processing position A1 has the top surface at the same height as the pass line PL, and all the dies D other than the processing position A1 have a top surface lower than the pass line PL. Since the workpiece W is at the height, even if the workpiece W is horizontally moved between the upper and lower turrets 11 and 13 at the height of the pass line PL, the back surface of the workpiece W does not need to be in contact with the die D other than the processing position A1. . As a result, it is possible to minimize the occurrence of scratches on the back surface of the workpiece W during horizontal movement.
[0035]
Next, an operation of fixing a predetermined die D to the processing position A1 by the lock device 39 will be described with reference to FIG. This is done by fixing a predetermined die holder 35 at a predetermined position A2 on the upper surface of the disk support 37. As shown in FIG. 5A, the chucks 53L and 53R are positioned on the side portions of the tapered surfaces 49L and 49R of the die holder 35 in a state where the die holder 35 is positioned at a predetermined position A2 on the upper surface of the disk support 37. It is provided as follows.
[0036]
When the die holder 35 is positioned at the predetermined position A2 on the upper surface of the disk support 37, first, the piston rods 61L and 61R of the lock cylinders 55L and 55R are contracted. Then, the chucks 53L and 53R descend in the direction of arrow E1. As a result, as shown in FIG. 5B, the pressing surfaces 51L and 51R are pressed against the tapered surfaces 49L and 49R, respectively. At the same time, the key 57 of the pressing surface 51L is inserted into the key groove 59, and the die holder 35 is fixed at a predetermined position A2. The fixing of the die holder 35 is performed by reversing the above-described operation.
[0037]
Thus, since the key 57 is inserted into the key groove 59 when the position is fixed, the predetermined die D can be accurately positioned at the processing position A1. Further, since the die holder 35 is firmly pressed and fixed by the two chucks 53L and 53R, it is possible to prevent the predetermined die D from being displaced from the processing position A1 due to an impact when processing the workpiece W.
[0038]
Next, a second embodiment of the present invention will be described with reference to FIGS. The punch press according to the present embodiment is characterized by the lock device 67 in the punch press 1 according to the first embodiment. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0039]
As shown in FIGS. 8 to 10, the lock device 67 in the punch press according to the present embodiment is configured so that the outer side of the die holder 69 in the radial direction of the lower turret 13 (the right side in FIGS. 8 and 9, the front side in FIG. 10). A shot pin cylinder 75 for inserting a shot pin 73 into the bush 71 when the die holder 69 is positioned at a predetermined position A2 on the upper surface of the disk support 37, and a bush When the shot pin 73 is inserted into 71, a V-shaped type that engages and supports the side surface (the left side in FIGS. 8 and 9) of the die holder 69 opposite to where the bush 71 is formed. A support block 77 and a support block cylinder 79 for raising and lowering the support block 77 are provided.
[0040]
The support block 77 can be moved up and down from an appropriate position near the side surface of the die holder 69 to a lower position that does not hinder the rotation of the lower turret 13 by expansion and contraction of the piston rod 81 of the support block cylinder 79.
[0041]
Next, the operation of the punch press of this embodiment will be described. As shown in FIG. 10, the operation of indexing the die holder 69A in the normal state to the predetermined position A2 on the upper surface of the disk support 37 and returning the die holder 69 at the predetermined position A2 to the normal state (the same height as the die holder 69A) has been described above. This is basically the same as in the case of the first embodiment. That is, when the lower turret 13 is rotated and the die holder 69A is moved in the direction of the arrow C1, the die holder 69A is led up to the predetermined position A2 by sliding up while the lower tapered surface 47A is engaged with the slope 45A. When the lower turret 13 is further rotated and the die holder 69 is moved in the direction of the arrow C1 from the predetermined position A2, the lower tapered surface 47B of the die holder 69 slides down the slope 45B and is guided to the normal state.
[0042]
Next, an operation of fixing a predetermined die holder 69 at a predetermined position A2 on the upper surface of the disk support 37 by the lock device 67 in the punch press according to the present embodiment will be described with reference to FIG.
[0043]
First, as shown in FIG. 5A, when the die holder 69 is indexed to a predetermined position A2 on the upper surface of the disk support 37 by the above-described operation, the support block 77 is lowered to a position where the rotation of the lower turret 13 is not hindered. Is in a state.
[0044]
When the die holder 69 is located at the predetermined position A2 of the disk support 37, the piston rod 81 is extended to raise the support block cylinder 79 to an appropriate position near the side surface of the die holder 69.
[0045]
Next, the shot pin cylinder 75 is driven and the shot pin 73 is inserted into the bush 71 as shown in FIG. Thus, by pressing the die holder 69 against the support block 77 with the shot pin 73, the die holder 69 is fixed at the predetermined position A2. The fixing of the die holder 69 is performed by reversing the above-described operation.
[0046]
Thus, since the shot pin 73 is inserted into the bush 71 when the position is fixed, the predetermined die D can be accurately positioned at the processing position A1. Further, since the die holder 69 is firmly pressed and fixed by the shot pin 73 and the V-shaped support block 77, it is possible to prevent the predetermined die D from being displaced from the processing position A1 due to an impact when processing the workpiece W. .
[0047]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the upper surface of the die other than the machining position is at a position lower than the pass line, the workpiece is moved horizontally without bringing the back surface of the workpiece into contact with the die other than the machining position. be able to. In addition, the die can be securely held on the pass line so as to withstand the load during processing.
[0048]
Further, according to the invention of claim 1, when processing the workpiece at the processing position, a predetermined die can be prevented from deviating from the machining position.
[0049]
Furthermore, according to the first aspect of the present invention , the predetermined die can be accurately positioned at the processing position, and the predetermined die can be prevented from being displaced from the processing position when processing the workpiece. .
[Brief description of the drawings]
FIG. 1 is a plan view of a first embodiment of a punch press according to the present invention.
FIG. 2 is a side view of the above embodiment.
FIG. 3 is a plan view of the die positioning and fixing device in the embodiment.
FIG. 4 is a cross-sectional view taken along the line AA ′ of the die positioning and fixing device.
FIG. 5 is a side view of the die positioning and fixing device.
FIG. 6 is an explanatory diagram of an indexing operation to a machining position of a die in the above embodiment.
FIG. 7 is an explanatory diagram of a position fixing operation at a die machining position in the embodiment.
FIG. 8 is a plan view of a die positioning and fixing device according to a second embodiment of the punch press of the present invention.
FIG. 9 is a cross-sectional view taken along the line BB ′ of the die positioning and fixing device.
FIG. 10 is a side view of the die positioning and fixing device.
FIG. 11 is an explanatory diagram of a position fixing operation at a die machining position in the embodiment.
FIG. 12 is an explanatory diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Punch press 3 Main body frame 5 Upper frame 7 Lower frame 11 Upper turret 13 Lower turret 15 Turret rotation motor 17 Ram 19 Cylinder 21 Work table 23 Carriage base 25 Motor 27 Clamper 29 Carriage 31 Motor 33 Die positioning fixing device 35 Die holder 37 Disc Support 39 Locking device 41 Turret key 43 Turret key groove 45A, 45B Slope 47A, 47B Lower taper surface 49L, 49R Tapered surface 51L, 51R Press surface 53L, 53R Chuck 55L, 55R Lock cylinder 57 Key 59 Keyway 61L, 61R Piston rod 65 Die positioning fixing device 67 Lock device 69 Die holder 71 Bush 73 Shot pin 75 Shot pin cylinder 77 Support block 79 Support block Cylinder 81 piston rod

Claims (1)

A plurality of die holders are attached to the periphery of the lower turret that is rotatably supported so as to be movable up and down.
A die is attached to each of the plurality of die holders so that the upper surface thereof is positioned slightly lower than the work pass line,
In a predetermined processing position, a holder supporting member is provided that supports the lower surface of one of the die holders in a slightly raised state, and aligns the upper surface of the die attached to the die holder with the pass line of the workpiece,
When one of the die holders is moved to the processing position by the rotation of the lower turret, a slope that guides the lower surface of the die holder so as to ride on the upper surface of the holder supporting member is lateral to the holder supporting member. formed in,
A lock mechanism for fixing the die holder to a predetermined position on the upper surface of the holder support member;
The locking mechanism is
A shot pin bush formed on a side of the die holder, a shot pin cylinder for inserting a shot pin at the tip of the bush when the die holder is positioned at a predetermined position on the upper surface of the holder support member, and the bush When the shot pin is inserted into the V-shaped support block that engages and supports the side surface of the die holder opposite to the side where the bush is formed, and the support block is raised and lowered A punch press comprising a support block cylinder .

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