JPH0857800A - Turret punch press - Google Patents

Abstract

PURPOSE: To provide a turret punch press inexpensive without needing automatic lubrication. CONSTITUTION: A lower turret 3 is supported in the air so as to reduce frictional resistance to enable high speed rotation. A clearance 20 is provided between a frame 1 and the lower turret 3, and a slide block 21 integrated with a knock pin 11 can protrude/recede from/into the clearance 20. During the rotation of the lower turret 3, the slide block 21 is pulled out so as not to impede the rotation. After the end of rotation, the slide block 21 is made enter into the clearance 20 simultaneously with the insertion of the knock pin 11 into the pin hole 12 of the lower turret 3. The upper face of the slide block 21 is brought into close contact with the lower face of the lower turret 3, and pressure from a hydraulic cylinder 4 is transmitted to the frame 1 directly from the lower turret 3 so that large load is not applied to a turret shaft 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a turret punch press.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a conventional turret punch press. In the figure, 1 is a frame, 2 is an upper turret, 3 is a lower turret, 4 is a hydraulic cylinder, and 5 is a punch. The upper turret 2 and the lower turret 3 are held facing each other on the frame 1, and the lower turret 3 can be rotated in synchronization with the upper turret 2.
Rotational force is transmitted from one drive motor (not shown) to the tunes 8, 8 ', sprockets 7, 7', and turret shafts 6, 6 'via a transmission mechanism.
A slide plate 9 is provided between the lower turret 3 and the frame 1. An oil reservoir is provided on the slide plate 9 by scraping, and an oil film is formed between the slide plate 9 and the lower turret 3 to reduce frictional resistance so that the lower turret 3 can be rotated with a small driving force. In addition, the shortage of oil caused by the rotation of the lower turret 3 is automatically or manually supplied by a lubricating device.

In this device, the pressing force generated in the hydraulic cylinder 4 is transmitted to the lower turret 3 via the punch 5, but the compressive force is transmitted to the slide plate 9 directly below the punch 5 to the lower turret 3. It does not give a big deformation. In the figure, 10 is a knock pin for the upper turret, 11 is a knock pin for the lower turret, and the upper turret 2 and the lower turret 3 are each provided with a plurality of pin holes 12 for indexing.

FIG. 5 shows the structure of another conventional turret punch press. In this example, unlike the previous example, the lower turret 3 is floated from the frame 1 without providing the slide plate 9, so that the turret shaft 13 is made to have a large diameter to have rigidity and a bearing. 14 is also enlarged to increase rigidity, to reduce the overhang X, and to reduce the moment when the pressing force is applied by the punch 5. The position of the sprocket 7 is also directly below the lower turret 3, and the moment due to the tension of the chain 8 is applied in a direction to cancel the moment due to the pressing force (arrow Y in the figure), and the rigidity of the knock pins 10 and 11 is increased. The turret 3 reduces the moment transmitted to the bearing 14.

In the conventional turret punch press, the turret is required to rotate at a high speed (30 to 150 rpm) in order to call the next die in a short time, and at the same time endure a large pressing force. Was required.
For this reason, from the method of sliding the scraped surface at the expense of high speed to endure a large pressing force as in the above-mentioned conventional method, a highly rigid bearing is used as in the above-mentioned conventional method. It has come to receive moment load force.

[0006]

However, the conventional turret punch press requires a large amount of cost to manufacture in any of the above-mentioned methods, and the latter bearing method does not eliminate manual work such as scraping work. Even if possible, expensive bearings that require automatic lubrication must be used. Therefore, development of an inexpensive turret punch press that does not require automatic lubrication has been desired.

In the turret punch press, the present inventor applies the processing force only when the turret is stopped, but the processing force is not applied when the turret is rotated. It came to the idea of selectively using the high pressure force stopped state.

[0008]

According to the present invention, there is provided a turret punch press according to the present invention, wherein a lower turret is mounted on the frame so that a gap between the lower turret and the frame is clear.
A portion provided with a block capable of retracting in the gap between the lower turret and the frame in conjunction with a knock pin for indexing the position of the lower turret and its driving means, and a pressing force is applied to the retracting position of the block by a punch. It is configured as the lower side.

The turret punch press according to the present invention is
A fixing block is provided on the upper surface of the frame or on the lower surface of the lower turret at a position corresponding to the position of the block being protruded and retracted, and the opposing surfaces of the block and the fixed block are tapered to enable sliding contact. Can be.

[0010] The turret punch press according to the present invention comprises:
The upper surface of the block and the lower surface of the entry portion of the block of the lower turret may be stepped.

The turret punch press according to the present invention is
A key may be used in place of the knock pin, and a key groove may be provided in the lower turret instead of the hole for the knock pin.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that in the following description, the parts common to the conventional ones will be denoted by the common reference numerals.

FIG. 1 is a side view of a first embodiment of a turret punch press according to the present invention. The upper turret 2 and the lower turret 3 are provided on the frame 1 so as to face each other, the turret shaft 6 rotates by receiving the driving force from the chain 8 via the sprocket 7, and the hydraulic cylinder 4 The position of is the same as the device of Fig. 4,
A gap 20 is provided between the frame 1 and the lower turret 3 without providing a slide plate. In the figure, reference numeral 21 denotes a slide block, which is integrated with the knock pin 11 for the lower turret 3 and is slid in the left and right directions in FIG. It is possible to do.

That is, in this apparatus, the lower turret 3 is supported in the air so that the lower turret 3 can be driven without any interference, the frictional resistance is reduced, and high speed rotation is possible. Also,
While the lower turret 3 is rotating, the slide block 21 is pulled out by the air cylinder 22 until the rotation of the lower turret 3 is not hindered. , 11 are inserted into the pin holes 12 of the turrets 2 and 3 at the same time, the slide block 21 is advanced into the gap 20 at a position directly below the punch 5, and the upper surface is brought into close contact with the lower surface of the lower turret 3. 4 is transmitted directly from the lower turret 3 to the frame 1 so that a large load is not applied to the turret shaft 6.

FIG. 2 is an enlarged side view of a second embodiment of the turret punch press according to the present invention. In this embodiment, the stroke of the air cylinder 22 in the previous embodiment is set to about the same as the case where only the knock pin is driven, and the demand for shortening the die replacement time is met. Therefore, the pin hole 12 for the knock pin 11 is formed in the lower turret 3.
Key block 30 in place of the knock pin 11, a key 31 is used in place of the knock pin 11, blocks 32 and 33 in which the slide block 21 is so-called tapered are divided, and the upper block 32 is used as a movable block. As in the above example, it is attached to the air cylinder 22, and the lower block 33 is fixed to the upper surface of the frame 1 as a fixed block. The height dimension of the key groove 30 provided in the lower turret 3 is set in consideration of the vertical movement of the key 31.

The movable block 32 is located at such a position that the key 31 just comes out of the key groove 30 even when the movable block 32 is pulled out to the outside, while the fixed block 33 is fixed at a position corresponding to the entry position of the slide block 21 in the previous example. It is. The tapered surfaces 34 and 35, which are the mating surfaces of the blocks 32 and 33, are inclined so as to be higher from the outer peripheral side to the inner peripheral side of the lower turret 3.

For this reason, when the movable block 32 is advanced into the gap 20 by the air cylinder 22 and rides on the fixed block 33, the movable block 32 is lifted slightly upward to bring the lower turret 3 into close contact with the lower surface. When the movable block 32 is slightly pulled out from the gap 20, the movable block 32 is separated from the lower surface of the lower turret 3 and does not hinder its rotation. Similar to the previous embodiment, when the movable block 32 is in close contact with the lower surface of the lower turret 3, the pressure from the hydraulic cylinder 4 is applied to the lower turret 3.
From the turret shaft 6
When the movable block 32 is pulled out, the lower turret 3 can rotate at high speed.
The reason why the knock pin is placed on the side opposite to the pressing point by the punch is that the vicinity of the pressing point is likely to interfere with other elements. Smaller, so that interference with other components is reduced.

The fixed block 33 is attached to the lower turret 3
It may be fixed to the lower surface of the lower turret 3, or the lower surface of the lower turret 3 may be cut to replace the fixed block 33,
In this case, the inclination of the tapered surface is opposite to that in the illustrated example. Also, in this embodiment, instead of indexing by fitting a key and a key groove, indexing by a knock pin and a pin hole can be used as in the previous embodiment.

FIG. 3 is an enlarged side view of a third embodiment of the turret punch press according to the present invention. In this embodiment, indexing by the key groove 30 and the key 31 is employed as in the second embodiment. However, the slide block is not divided as in the second embodiment, but a lower turret. 3 is provided with a stepped portion 40 by shaving the lower surface, and the upper surface of the slide block 41 is also formed in a stepped shape in accordance with this.
The slide block 41 can be retracted with a short stroke as in the second embodiment.

Also in this third embodiment, not the combination of the key groove 30 and the key 31, but the pin hole 1 as in the first embodiment.
The combination of the key groove 30 and the key 31 can be a combination of the key groove 30 and the key 31. However, since there are many machined parts on the lower surface of the lower turret 3, if the combination is processed together, the combination of the key hole 30 and the key 31 is more effective than the processing of the pin hole Processing costs can be reduced.

[0021]

Since the turret punch press according to the present invention is as described above, the performance is comparable to the conventional turret punch press, and the manufacturing cost can be reduced. There is an effect that. In addition, hydraulic turret punch presses were equipped with automatic lubrication devices only for slide plates and bearings that received the pressing force of the punch, but this became unnecessary, which further reduced equipment costs, and also resulted in the disposal of lubricating oil, etc. Lubricating oil, which has caused pollution and contamination of the machine, is not required, and maintenance is almost unnecessary, so that it is easy to use.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is an enlarged partial side view of the second embodiment of the present invention.

FIG. 3 is an enlarged partial side view of a third embodiment of the present invention.

FIG. 4 is a side view showing the structure of a conventional turret punch press.

FIG. 5 is a side view showing the structure of another conventional turret punch press.

[Explanation of symbols]

 1 Frame 2 Upper Turret 3 Lower Turret 4 Hydraulic Cylinder 5 Punch 6 Turret Shaft 7 Sprocket 8 Tune 10, 11 Knock Pin 12 Pin Hole 20 Gap 21 Slide Block 22 Air Cylinder 30 Key Groove 31 Key 32 Movable Block 33 Fixed Block 34, 35 Tapered surface 40 Step part of lower turret 41 Slide block

Claims (4)

[Claims] 1. A lower turret is mounted on the frame so that a clearance is formed between the lower turret and the frame, and the lower turret can be retracted into the space between the lower turret and the frame in conjunction with a knock pin for determining the position of the lower turret. Turret punch press, characterized in that the block is provided with a driving means for the block, and the protruding / withdrawing position of the block is located below the portion to which the pressure applied by the punch is applied. 2. A fixed block is provided on the upper surface of the frame or on the lower surface of the lower turret at a position corresponding to the position of the block, and opposing surfaces of the block and the fixed block are tapered so that they can be slidably contacted. The turret punch press according to claim 1, wherein: 3. The turret punch press according to claim 1, wherein an upper surface of the block and a lower surface of an entrance portion of the block of the lower turret are each stepped. 4. The turret punch press according to claim 1, wherein a key is used instead of the knock pin, and a key groove is provided in the lower turret instead of the hole for the knock pin.