JPH0152096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for rotationally driving a rotary die in a turret punch press.

(Prior Art) A turret punch press is generally constructed by mounting a number of upper dies on a disc-shaped or fan-shaped upper turret, and mounting a lower dies facing the upper dies on the lower turret. be.

With such a turret punch press, even when performing punching of the same shape, if the shape has directionality and the directions are different, multiple upper and lower dies of the same shape may be punched. It was necessary to attach the molds to the upper and lower turrets in different directions. Therefore, there was a problem in attaching more upper and lower molds to the upper and lower turrets.

In recent years, in order to solve the above problems, for example, Japanese Patent Application No. 55-33330 (Japanese Unexamined Patent Publication No. 56-131023)
(hereinafter referred to as prior art), a technology has been developed in which an upper mold and a lower mold are rotatably mounted on upper and lower turrets. However, in the technology developed in recent years, the upper and lower molds are attached to the upper and lower turrets that can be rotated freely, and the rotation drive device for rotating the upper and lower molds is a turret punch. It is attached to the frame side of the press.

(Problems to be Solved by the Invention) In the above configuration, in order to rotate the upper and lower molds, it is necessary to connect the rotation drive device attached to the frame and the upper and lower molds.

Therefore, in the prior art, a plurality of shot pins are provided on a pulley rotatably supported by a frame in a rotary drive device so as to be movable up and down, and a piston is provided on the frame to move the shot pins up and down. . On the other hand, the upper and lower turrets are provided with an engagement hole in which the shot pin can be freely engaged and detached from a driven pulley connected to the upper and lower molds, and the driven pulley is connected to and disengaged from the engagement hole. This configuration includes a brake device that switches between a freely rotatable state and a fixed state.

That is, there was a problem in that the structure for connecting the rotation drive device on the frame side and the upper and lower molds mounted on the upper and lower turrets was complicated.

This invention was invented in view of the above-mentioned problems, and its purpose is to provide a means for quickly connecting the upper and lower molds attached to the upper and lower turrets and the rotary drive device attached to the frame side with a simple structure. It provides:

(Means for Solving the Problems) In order to achieve the above objects, in this invention, the ends of rotating shafts respectively connected to upper and lower molds rotatably mounted on upper and lower turrets are provided. A first engaging part is provided at the end of the transmission shaft, and a second engaging part is provided at the end of the upper and lower transmission shafts connected to the rotary drive device. The first plate formed at the end of the rotating shaft
One of the engaging parts is configured as a flat engaging part and the other is configured as a grooved engaging part so that the engaging part and the second engaging part formed at the end of the transmission shaft engage with each other. It is something.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the overall structure of a turret punch press will be explained.

As shown in FIG. 1, the turret punch press 1 is comprised of a gate-shaped frame in which an upper frame 9 is supported by side frames 5 and 7 erected on both sides of a base 3.

On the lower surface of the upper frame 9, a disk-shaped upper turret 13 on which a number of upper molds 11 are mounted is rotatably supported by an upper vertical shaft 15.
Further, on the upper surface of the base 3, a lower turret 19 is rotatably supported by a lower vertical shaft 21, on which are mounted a number of lower molds 17 facing each upper mold. The upper turret 13 and the lower turret 1
The upper and lower molds 11 and 17 are rotated synchronously in the same direction by a servo motor (not shown) installed in the frame, so that the upper and lower molds 11 and 17
It is indexed and positioned directly below a ram 23 mounted on the bottom surface of the ram 23 so as to be movable up and down.

In order to move and position the plate-shaped workpiece W in the front, rear, right and left directions, guide rails 25 extending in the left and right directions in FIG. A movable table 27 is movably supported. Each movable table 27 is located on both sides of the fixed table 29 fixed on the base 3, and the first carriage 31 extends in the front and rear direction so as to straddle the fixed table 29.
Each movable table 27 is integrally connected. A movable table 25 is mounted on the first carriage 31.
A second carriage 33 is attached to the second carriage 33, which is movable in the front-rear direction orthogonal to the direction of movement of the workpiece. is attached so that its position can be adjusted in the front and rear directions.

The turret punch press 1 having the above configuration has the following features:
Since these are generally known, detailed explanations of other configurations and operations will be omitted.

As shown in FIGS. 2 and 3, upper rotary mold holders that can freely rotate horizontally with respect to the upper turret 13 are installed at appropriate locations (symmetrical positions in this embodiment) on the upper surface of the upper turret 13. 37a and 37b are attached. Upper rotating mold holder 37a, 37
b is connected to the upper rotating shaft 39 so as to be rotated by the upper rotating shaft 39 which extends in the radial direction of the upper turret 13 and is rotatably provided.

Further, in the lower turret 19, at positions corresponding to the upper rotary mold holders 37a and 37b,
Lower rotary mold holders 41a and 41b are rotatably mounted on the lower turret 19. The lower rotary mold holders 41a and 41b are connected to the lower turret 1.
It is connected to the lower rotating shaft 43 so as to be rotated by the lower rotating shaft 43, which is rotatably provided and extending in the radial direction of the rotor 9.

The configurations of the upper rotating shaft 39 and the lower rotating shaft 43 are almost the same, and both ends of each are as follows.
The upper turret 13 and the lower turret 19 slightly protrude outward from their outer peripheral edges. Upper rotating shaft 39
The end of the upper transmission shaft 47 (see FIG. 4) of the upper transmission device 45 mounted on the upper frame 9 can be freely engaged and disengaged, and the end of the lower rotating shaft 43 can be freely engaged with and disengaged from the end of the upper transmission shaft 47 (see FIG. 4) of the upper transmission device 45 mounted on the upper frame 9. The end portion of the lower transmission shaft 51 in the lower transmission device 49 can be freely engaged with and disengaged from the lower transmission shaft 51 .

The upper and lower transmission devices 45 and 49 have substantially the same construction, and are each connected to a rotational drive device 53 such as a servo motor appropriately mounted on the frame.

Therefore, when the end of the upper rotating shaft 39 is engaged with the end of the upper power transmission shaft 47 and the end of the lower rotating shaft 43 is engaged with the end of the lower power transmission shaft 51, the rotation occurs. By rotationally driving the drive device 53, the upper rotary mold holders 37a, 37b and the lower mold holders 41a, 41b are simultaneously rotated in the same direction. Therefore, the upper and lower molds supported by the upper and lower rotary mold holders 37a, 37b; 41a, 41b are rotated horizontally with respect to the upper and lower turrets 13, 19. In contrast, the mold directionality can be positioned in any direction.

The rotary drive device 53 is attached to a gearbox 55 suitably attached to the frame, and a drive gear 59 is integrally attached to a drive shaft 57 protruding into the gearbox 55. The gearbox 55 has a first shaft 61 and a second shaft 6 spaced apart from each other vertically.
3 is rotatably supported, and driven gears 65 and 67 having the same diameter and meshing with the drive gear 59 are integrally attached to one ends of the first shaft 61 and the second shaft 63, respectively. Therefore, the upper and lower first,
The second shafts 61 and 63 are simultaneously rotated in the same direction by the rotary drive device 53.

The one shaft 61 is connected to the input shaft 69 of the upper transmission device 45 via a general universal joint 71. And input shaft 69
A timing belt 79 is wound around a pulley 73 provided in the upper transmission device 45 and a pulley 77 integrally attached to an intermediate shaft 75 (see FIG. 4) of the upper transmission device 45. The intermediate shaft 75 is rotatably supported by a frame 81 of the upper transmission device 45, and an intermediate gear 8 is attached to one end of the intermediate shaft 75.
3 are integrally formed.

Further, a fixing and holding device 85 is attached to the other end of the intermediate shaft 75, and is capable of preventing rotation of the intermediate shaft 75 and holding the intermediate shaft 75 in a fixed state. This fixed holding device 85
is comprised of, for example, an electromagnetic or mechanical brake device, and its details will be omitted. The intermediate gear 83 on the intermediate shaft 75 is connected to the frame body 81
A transmission gear 8 is integrally attached to one end of the upper transmission shaft 47, which is horizontally and rotatably supported on the upper transmission shaft 47.
It meshes with 7. Therefore, the rotary drive device 5
3, the upper transmission shaft 47 can be rotated.

The other end of the upper transmission shaft 47 is connected to the upper turret 13.
It protrudes to the side and is disposed on the trajectory drawn by the end of the upper rotating shaft 39 when the upper turret 13 rotates. The other end of the upper power transmission shaft 43 is formed with a second engaging portion 91 that can be freely engaged with and disengaged from the first engaging portion 89 formed at the end of the upper rotating shaft 39 .

That is, at the end of the upper rotating shaft 39, there is a fourth
As is clear from FIGS. 5 and 5, a first engaging portion 89 having a substantially rectangular cross-sectional shape and a flat shape is formed.
At the other end of the upper transmission shaft 47, the first engaging portion 8 is provided.
In this embodiment, a plurality of cam followers 93 are mounted to sandwich the first engaging portion 89 from both sides.

Therefore, the first engaging portion 89 of the upper rotating shaft 39
When the second engagement portion 91 of the upper transmission shaft 47 is in the engaged state, by releasing the fixation of the intermediate shaft 75 by the fixed holding device 85, the rotation of the rotational drive device 53 is controlled by the upper transmission shaft. 47 to the upper rotating shaft 39.

By the way, the upper rotating shaft 39 is connected to the upper turret 13.
Therefore, when the upper turret 13 rotates, the end of the upper rotating shaft 39 draws a circular locus centered on the shaft 15. Therefore, when the upper turret 13 is rotated when the first engaging part 89 of the upper rotating shaft 39 and the second engaging part 91 of the upper transmission shaft 47 are in the horizontal state as shown in FIG. The first engaging portion 8
9 will automatically engage and disengage. Therefore, the upper turret 13 can be indexed and positioned at a predetermined position without using a special clutch device, and at the same time the first engaging portion 89 and the second engaging portion 89 can be indexed and positioned at a predetermined position.
The engaging portion 91 is automatically engaged with the engaging portion 91.

Note that the gear box 55 is connected to the lower rotating shaft 4.
3 is the same as the configuration for transmitting rotation from the gear box 55 to the upper rotating shaft 39 as described above, so the same reference numerals are given to the components that perform the same function, and the details will be explained below. is omitted.

As shown in detail in FIG. 2, the upper rotating shaft 39 includes worm shafts 97a and 97b that are rotatably supported on bearing blocks 95a and 95b at symmetrical positions on the upper turret 13, and a rotation shaft of the upper turret 13. It consists of a connecting shaft 99 etc. that passes through the shaft 15 horizontally, and both worm shafts 97a, 97
b and both ends of the connecting shaft 99 are connected via a general universal joint 101. The first engaging portions 89 are formed at the ends of both worm shafts 97a and 97b. Worms 97'a and 97'b integrally formed on both the worm shafts 97a and 97b mesh with worm gears formed on the upper rotary mold holders 37a and 37b. The upper rotary mold holders 37a and 37b are constructed as shown in FIG. 6, for example.

That is, a cylindrical bushing member 105 is fitted and fixed in a mold holder hole 103 bored in the upper turret 13, and a cylindrical rotary holder 109 is installed inside this bushing member 105 via a plurality of bearings 107. is rotatably supported. A worm gear 1 that meshes with the worms 97'a and 97'b is mounted on the upper part of the rotary holder 109.
11 are integrally fixed with bolts or the like, and a positioning key 115 for directional positioning of the upper mold 113, which can be detached and replaced, is integrally attached to the rotary holder 109.

Therefore, when the worm shafts 97a, 97b are rotated in appropriate directions, the rotating holder 109 is rotated with respect to the upper turret 13, and the upper mold 113 attached to this rotating holder 109 is rotated horizontally. It is something. In addition, the upper mold 113
is always urged upward by the action of a lifter spring 119 in a general mold lifter device 117 mounted on the upper turret 13.

In order to prevent the upper rotating shaft 39 from rotating when the turret turns, a brake ring 121 is integrally attached to a suitable position of the connecting shaft 99 on the upper rotating shaft 39, as shown in FIG. Yes, brake ring 121 of upper turret 13
A fixing and holding device 123 that can freely clamp and fix the brake ring 121 is attached at a position corresponding to the brake ring 121. This fixing and holding device 123 clamps and fixes the brake ring 121 to the upper rotating shaft 3.
9 and the upper rotary mold holders 37a, 37b from rotating due to vibration or the like. Note that the fixed holding device 123 is, for example, a seventh
It is constructed as shown in FIGS.

That is, the upper turret 13 is attached by bolts etc.
Clamp base 12 with a U-shaped cross section fixed on top
Two clamp jaw members 131a and 131b having clamp shoes 129a and 129b at their tips are horizontally rotatably mounted in the recess 127 at 5 via a pivot shaft 133. Appropriate bullets 135 such as urethane rubber are loaded near the other ends of the clamp jaw members 131a and 131b. Therefore, the clamp jaw member 1
31a and 131b are the brake rings 121;
It is always energized so as to hold it in place.

Further, the vertical wall portion 13 of the clamp base 125
7a, 137b are links 141 provided with pressing portions 139a, 139b that press the clamp jaw members 131a, 131b against the bullet 135.
a, 141b are pivotally connected via horizontal pivots 143a, 143b, and links 141a, 141b
The ends thereof are pivotally connected via a hinge pin 145. The other end of one link 141b largely protrudes laterally. Therefore, by pressing down the other end of the link 141b, the clamp jaw members 131a, 131b are pressed against the bullet 135, and the clamping of the brake ring 121 is released.

A pressing cylinder 147 is provided at a symmetrical position on the upper frame 9 as a device for pressing down the other end of one link 141b in the fixed holding device 123.
a, 147b are attached. Pressing cylinder 14
One link 1 is attached to the lower end of a piston rod (not shown) provided in 7a, 147b so as to be able to move up and down.
Push rod 149 that presses the other end of 41b
is fixed with a screw. This push rod 149
is attached to the upper frame 9 via the bracket 151.
Dog 1 that operates the proximity switch 153 attached to
55 is installed. The above proximity switch 153
detects the vertical movement of the dog 155 and fixes the holding device 123 by the pressing cylinders 147a and 147b.
This is used to detect the fixation and release of

With the above configuration, the pressure cylinders 147a, 14
7b and the push rod 149 presses the other end of the link 141b, thereby releasing the brake ring 121 from being held by the clamp jaw members 131a and 131b.

The configuration of the lower rotary mold holders 41a and 41b attached to the lower turret 19 is almost the same as the configuration of the upper rotary mold holders 37a and 37b described above, and the lower rotary shaft 43 is the same as the upper rotary shaft. It has almost the same configuration as No. 39. Furthermore, since the configuration of the fixing and holding device that can freely fix the lower rotation shaft 43 is the same as that of the above-mentioned fixing and holding device 123, the same reference numerals are given to the constituent members that have the same function, and the details thereof will be explained below. The explanation will be omitted.

The fixed holding device 123 attached to the lower turret 19 is connected to the press cylinder 14 attached to the base 3 via an intermediate rod 157 (see FIG. 3) attached to the lower turret 19 so as to be movable up and down.
7a, 147b from below.

In the above configuration, the clamp device 35
After performing normal punching while holding the workpiece W and positioning it by moving it back and forth and left and right, in order to perform punching using a rotary die, first, move the upper and lower turrets 13 and 19 as appropriate. The upper rotary mold holder 37a and the lower rotary mold holder 4 are rotated as appropriate.
1a is indexed and positioned below the ram 23.

In this way, the upper and lower rotary mold holders 37a, 4
When the index positioning of 1a is performed, the upper rotating shaft 3
9. As described above, the first engaging portion 89 formed at the end of the lower rotating shaft 43 automatically engages with the second engaging portion 91 formed at the end of the upper power transmission shaft 47 and the lower power transmission shaft 51. They will be engaged.

Therefore, appropriate upper and lower pressing cylinders 147
a, 147b was activated to release the fixation of the upper rotating shaft 39 and lower rotating shaft 43 by the fixed holding device 123, and also released the fixing of the intermediate shaft 75 by the fixed holding device 85 in the upper and lower transmission devices 45, 49. Later, by rotationally driving the rotary drive device 53, the upper and lower rotary mold holders 37a, 37
b; 41a and 41b are to be rotated as appropriate.

(Effects of the Invention) As can be understood from the above description of the embodiments, the gist of the present invention is as described in the claims.According to the present invention, the upper and lower turrets are rotated. When the rotary mold holder is indexed to the lower position of the ram, the first engagement portion at the end of the rotary shaft connected to the rotary mold holder and the second engagement portion at the end of the transmission shaft connected to the rotary drive device. are engaged simultaneously with the index positioning.

In other words, according to the present invention, the rotary mold holder attached to the upper and lower turrets and the rotary drive device provided on the frame side can be assembled with an extremely simple structure without using a particularly complicated clutch device as in the prior art. can be quickly connected.

Note that this invention is not limited to the above-mentioned embodiments, but can be modified by making various design changes.
Other embodiments may also be implemented. For example, the configurations of the first engaging part on the upper and lower rotating shafts and the second engaging part on the transmission shaft may be reversed, or a guide slope part may be provided on the first engaging part etc. to facilitate engagement. It is also possible to form a groove, or to form the second engaging portion into a simple groove shape. Furthermore, each rotating shaft is not provided horizontally, but is provided perpendicularly to the upper and lower turrets by using a bevel gear, etc., and a second engaging portion that can be freely engaged with the first engaging portion formed at the end of the rotating shaft is provided. Each transmission shaft provided with an engaging portion is provided perpendicularly to the upper frame and the base, and the first and second engaging portions engage simultaneously when the upper and lower turrets are indexed and positioned at a predetermined position. It is also possible to do this. It is also possible to provide two rotational drive devices and separately rotate the upper and lower rotary mold holders.

[Brief explanation of drawings]

Fig. 1 is a front explanatory view of a general turret punch press, Fig. 2 is a schematic plan view corresponding to the view from the - line arrow in Fig. 1, and Fig. 3 is a view of Fig. 2 from below. FIG. 4 is an enlarged cross-sectional view corresponding to the view taken along the line arrow - in FIG. 2, and FIG.
The figure is a sectional view taken along the - line in Figure 4, and Figure 6 is a cross-sectional view taken along the line 2.
7 is an enlarged view of FIG. 3 in the direction of the arrows, FIG. 8 is a sectional view of FIG. 7 in the direction of the arrows, and FIG.
It is a line arrow view. Explanation of symbols representing main parts of the drawings, 13...
Upper turret, 19...Lower turret, 37a, 3
7b... Upper rotating mold holder, 41a, 41b... Lower rotating mold holder, 39... Upper rotating shaft, 43... Lower rotating shaft, 47... Upper transmission shaft, 51... Lower transmission shaft, 89... First engaging part, 91...Second engaging portion, 53
...Rotary drive device.

Claims (1)

[Claims] 1. An upper turret 13 that rotatably supports a plurality of upper rotary mold holders 37a and 37b each having an upper mold 113, and a plurality of lower molds each having a lower mold corresponding to the upper mold 113. Lower rotating mold holder 41a, 41b
A lower turret 19 is rotatably supported, a ram 23 is provided to be movable up and down to press the upper mold which is indexed and positioned at a predetermined position by the rotation of the upper and lower turrets 13 and 19, and the upper and lower molds. A rotary drive device for a rotary mold in a turret punch press, comprising: a workpiece movement and positioning device for moving and positioning a plate-shaped workpiece W to be processed in the front, back, left, and right directions; Holder 37a, 37b; 41
Upper and lower turrets 1 to rotate a and 41b
The upper and lower rotating shafts 39 and 43 are rotatably provided on the upper and lower rotating shafts 39 and 19, respectively, the rotation drive device 53 is provided on the frame side to rotationally drive the upper and lower rotation shafts 39 and 43, and the rotation of the rotation drive device 53 The upper and lower rotating shafts 39,
43, upper and lower transmission shafts 47, which are connected to the rotational drive device 53 on the frame side,
51, and by the rotation of the upper and lower turrets 13, 19, the upper and lower transmission shafts 47, 51 are attached to each end of the transmission shafts 47, 51 in order to be engaged with and disengaged from the first engaging portions 89 provided at each end of the upper and lower rotating shafts 39, 43. a second engaging portion 91 provided;
41a, 41b are indexed and positioned at predetermined positions below the ram 23, and at the same time, the first engaging portions 89 and the second engaging portions 91 engage with each other,
1. A rotational drive device for a rotary die in a turret punch press, characterized in that one engaging portion is configured as a flat engaging portion and the other engaging portion is configured as a concave engaging portion.