JP2560484B2 - Twin head punch press machine - Google Patents

Description

The present invention relates to a twin head punch press machine, and more particularly to a twin head punch press machine, and in particular, two sets of processing head portions each including a punch and a die, and a die which is not processed is a work table surface. The present invention relates to a twin head punch press machine which is adapted to be immersed downward.

[Conventional technology]

In general, a punch press is a machine tool for sheet metal working that performs punching and forming of a steel plate and the like, and has a punch for punching and the like and a die as a pedestal for the punch.

In such a punch press machine, recently, with the diversification of products, it is necessary to perform various kinds of processing by one machine. Therefore, a tool accommodating portion for accommodating a large amount of tools so that a large number of tools can be supplied to the head portion, and a tool exchanging device for exchanging the tool of the head portion are used, and further, To improve processing efficiency,
A twin-structure punch press machine having two sets of heads has been put into practical use.

With this twin-head punch press, it is possible to change the tool of the other head part at the same time as performing the machining work with one head part, so that the tool change time can be practically eliminated and the productivity can be improved. Can be improved. The unprocessed die can be immersed under the table surface, which prevents contact between the die and the work, protects the die and the work, and facilitates die tool replacement. There is.

[Problems to be Solved by the Invention]

In the above-described conventional configuration, when the die tool is replaced, an opening recess is formed on the work table surface above the recessed die. For this reason, there is a problem that the end of the work or the processing point is caught in and caught in the opening recess when the processing is being performed by one of the processing heads.

An object of the present invention is to provide a twin head punch press machine capable of preventing a work from being caught in an opening recess formed on the work table surface when one die tool is replaced.

[Means for solving the problem]

A twin-head punch brace machine according to the present invention has two sets of processing heads each consisting of a punch and a die, and selectively processes the same work while moving the work on a shared work table. A die that has not been subjected to the above-mentioned process is set to be immersed under the work table, and includes a lid and a lid moving mechanism. The lid is capable of closing a work table surface opening concave portion caused by the die being immersed. The lid moving mechanism is a mechanism for moving the lid between a closed position that closes the work table surface opening concave portion and a retracted position that opens the opening concave portion.

[Action]

In the present invention, when machining is performed by one machining head, the die of the other machining head is immersed below the work table surface. The depression of the die that has not been processed causes an opening concave portion on the work table surface. Next, the lid moving mechanism is driven to move the lid to the closed position to close the opening recess. Then, the workpiece is machined by giving a predetermined feed. At this time, since the opening concave portion of the table surface is closed by the lid, it is possible to prevent the end portion of the work and the like from entering the opening concave portion and being caught.

Further, the tool replacement is performed in the processing head portion which is not processed. Then, after the processing by one of the processing heads is completed, the lid moving mechanism is driven to move the lid to the retracted position to open the opening concave portion. Then, the tool-exchanged die is made to enter the opening concave portion of the work table, and the next machining is performed using the tool-exchanged tool.

〔Example〕

First, the overall configuration of a twin head punch press according to an embodiment of the present invention will be described with reference to FIG. This twin head punch press is mainly used for lower frame 1
And the upper frame 2 arranged above the lower frame 1.
And a throat portion 3 that supports them at the rear.

On the base 15 arranged in the center of the lower frame 1,
A fixed table 14 is arranged. A pair of guide rails 17 are arranged on the upper surface of the lower frame 1 on both sides of the fixed table 14. A carriage 12 extending in the left-right direction (X-axis direction) is provided on the guide rail 17 so as to be movable in the depth direction (Y-axis direction) by a ball screw 16 or the like provided on the lower frame 1. carriage
12 includes a pair of work holders for holding the work 10.
A cross slide (not shown) to which 11 is attached is provided so as to be movable in the X-axis direction.

The upper frame 2 is provided with a motor 21 as a driving source for punching, a flywheel 23 rotated by the motor 21 via a transmission member 22 such as a belt, and a crank mechanism 24 connected to the flywheel 23. ing. In addition, at the front end of the upper frame 2, a punch head is selectively reciprocated by a crank mechanism 24 through a selection mechanism 25.
30a and 31a are attached. Each of these punch heads 30a, 3
The die heads 30b, 31
b is installed. These punch heads and die heads constitute two sets of head portions 30 and 31.

Although not shown, the throat unit 3 is provided with a tool storage unit (tool magazine) for storing punches and dies to be supplied to the head units 30 and 31. Further, in the lower frame 1 and the upper frame 2 in front of the tool magazine, there is provided a tool changing device for changing the tool selected from the tool magazine and the tool of each head portion 30, 31.

3 and 4 show the head portions 30 and 31, the tool changing device 4
The relationship between 0 and the tool magazine 50 is shown. FIG. 3 is a schematic plan view thereof, and FIG. 4 is a partial sectional side view. Third
As shown in the figure, the head portions 30 and 31 are arranged in parallel. In the tool changer 40 and the tool magazine 50,
A plurality of punches or dies are arranged in a circle.

As shown in FIG. 4, the tool exchanging device 40 includes a punch exchanging section 40a provided on the upper frame 2 side, a die exchanging section 40b provided on the lower frame 1 side, and 41 for driving them. A drive mechanism including a transmission member 42, a rotary shaft 43, etc.
It is composed of 40c and. The punch exchanging section 40a and the die exchanging section 40b each have a pulley 45 that is rotated by a drive mechanism 40c, and disc parts 46a and 46b are fixed to this pulley 45. Holding mechanisms 47a, 47b for holding the punch 5 or the die 6 are arranged at predetermined intervals on the disk portions 46a, 46b. Further, these holding mechanisms 47a, 47b can be moved forward and backward in the radial direction by a forward and backward movement mechanism (not shown).

The tool magazine 50, like the tool changer 40,
It is composed of a punch accommodating portion 50a provided on the upper frame 2 side and a die accommodating portion 50b provided on the lower frame 1 side. Each of the accommodating portions 50a and 50b has a transmission device 51 including a sprocket and a chain, and holding mechanisms 52a and 52b arranged in the transmission device 51 at predetermined intervals. The punches 5 or the dies 6 are held by the holding mechanisms 52a and 52b, respectively.

Next, details of the die head portion will be described with reference to FIG. Two cylinder parts 18a and 18b are provided in a predetermined part of the lower frame 1, and the cylinder parts 18a and 18b are provided.
Die heads 70a, 70b are fitted in b so that they can be moved up and down by hydraulic pressure. That is, the inner walls of the cylinder parts 18a, 18b and the piston parts 75a, 75b at the outermost peripheral parts of the die heads 70a, 70b are respectively provided with seal rings such as O-rings, and between them, the upper hydraulic chamber 71a is provided. , 71b and lower hydraulic chambers 72a, 72b are formed. And each hydraulic chamber 71a, 71
Oil passages 73a, 73b, 74a, 74b communicate with b, 72a, 72b, respectively. As a result, the hydraulic oil from the external oil supply pump is introduced into the hydraulic chambers 71a, 71b, 72a, 72b via the control valve and the like.

The die head will be described below. Since the two die heads have the same structure, only one will be described. The die head 70a has a hollow piston portion 75a at the outermost periphery thereof. A holder 76a is rotatably fitted in the hollow piston portion 75a via a bearing 83a. The holder 76a is formed in a hollow shape so that the punched slag or the like can be discharged, and the die 6a is placed on the upper portion thereof.

In addition, the holder 76a has a die 6a mounted thereon.
A die fixing mechanism 60a for fixing the above is provided.
The die fixing mechanism 60a has a hydraulic chamber 61a formed in a part of the holder 76a, and a piston 62a fitted in the hydraulic chamber 61a so as to be able to move up and down via a seal ring. A piston rod 63a is fixed to the piston 62a, and a die fixing member 64a is attached to the top end of the piston rod 63a. An oil passage 65a communicates with the hydraulic chamber 61a. And
Oil is supplied to the hydraulic chamber 61a from the rotary joint 66a or the like provided under the holder 76a via the oil passage 65a.

Further, an index mechanism 80a for rotating the holder 76a to adjust the angle is arranged at a substantially central portion of the holder 76a. The index mechanism 80a includes a main body 81a having a worm wheel formed therein and a worm 82a meshing with the worm wheel. The main body 81a is slidable via the body of the holder 76a and the key 77a, and is rotatable with the holder 76a with respect to the lower frame 1 via the bearing 84a.

Although not shown, the punch head side is also provided with an index mechanism similar to that described on the die head side.

Next, the lid and the lid moving mechanism will be described with reference to FIGS. 1A to 1C. FIG. 1A is a plan view of a lid and a lid moving mechanism, FIG. 1B is a side view, and FIG. 1C is a schematic view of the arrow Z in FIG. 1B. In these figures, a pair of openings 20 through which the die can enter are formed in the head table facing portion of the fixed table 14 (only the die 6b side is shown in the figures).

The lid 90 is a generally disk-shaped member having a diameter smaller than that of the opening 20, and is attached to the upper end of the tip of the lid moving mechanism 100.

The lid moving mechanism 100 includes a pair of flat plate-shaped outer frame members 101 fixed on the lower frame 1, and a pin at one end of the outer frame member 101.
It is composed of a cylinder 103 that is rotatably connected via a 102, and a pair of flat plate-shaped slide members 104 that are slidably provided along the outer frame member 101.

At the tip of the cylinder rod 103a of the cylinder 103, a U-shaped member 106 in plan view is attached. On the other hand, a flat plate member 107 is fixed between the substantially central portions of the pair of slide members 104, and a member 107a is fixed to the lower surface of the flat plate member 107 so as to project downward. The member 107a is engaged with the concave portion of the U-shaped member 106, and is rotatable about a pin 108 that passes through both members. The outer frame member 101 is provided with a pair of stepped guide grooves 101a and 101b.
Further, the slide member 104 is equipped with a pair of pins 105a and 105b, respectively, and these pins 105a and 105b are
They are engaged with the guide grooves 101a and 101b, respectively. A flat plate member 109 is fixed to the tip of the slide member 104. The lid 90 is fixed to the upper surface of the flat plate member 109 with bolts 110. In each figure, the lid 90 is a fixed table.
14 shows a state of being depressed below 14 (retracted position).

 Next, the operation will be described.

First, the operation of the entire apparatus will be briefly described with reference to FIG. X for work holder 11 and carriage 12 respectively
By moving in the axial direction and the Y-axis direction, the work 10 on the work table is moved to the machining position. Next, the drive motor 21 is driven to rotate the flywheel 23, and the crank mechanism 24 is rotated via a clutch mechanism or the like. At this time, the selection mechanism 25 provided below the crank mechanism 24
Thus, one of the punch heads 30a and 31a is selected. Therefore, the driving force of the drive motor 21 is transmitted to the selected punch head, and the work such as punching the work 10 is performed by raising and lowering the punch. On the other hand, tool exchange is performed for the punch and die that are not selected.

This tool exchange operation will be described focusing on the tool supply operation. As shown in FIGS. 3 and 4, the plurality of punches and the dies are paired and housed in the tool magazine 50. In this tool magazine 50, a desired tool pair is rotationally moved to a tool replacement position (arrow A in FIG. 3) by a transmission device 51. At this time, the punches and the dies are conveyed as a pair so that the wrong combination of the punches and the dies is not supplied. Next, in the tool changer 40, the holding mechanism 47
The a and 47b respectively project toward the tool magazine 50 side by the advancing and retracting mechanism to grip the punch 5 and the die 6 of the tool magazine 50, and take them in to the tool changing device 40 side. In the tool changing device 40, each of the disk portions 46a, 46b is rotated from the tool changing position A by, for example, 180 ° (state shown in FIG. 3) to move each tool to the tool changing position with the head portion 31. Then, the respective exchanging parts 40a and 40b of the tool exchanging device 40 respectively perform substantially the same operations as described above, whereby a desired tool pair is delivered to the head part 31. It should be noted that the recovery of the tool is performed by an operation which is almost the reverse of the above operation.

At the time of this tool exchange, the die head on the tool exchange side, that is, the die head that has not been machined, descends from the machining position to the retracted position below the work table surface.

 The lowering operation of this die head will be described below.

As shown by the die head 70b on the right side of FIG. 2, when the die head 70b is lowered, oil is introduced into the upper hydraulic chamber 71b through the oil passage 73b (broken line arrow in the figure). Due to this hydraulic pressure, the piston part 75b, that is, the die head 70b is lowered from the processing position shown on the left side in FIG. 2 to a retracted position, for example, 4 cm below. At the same time, oil is supplied to the upper portion of the piston 62b in the hydraulic chamber 61b, whereby the piston 62b descends and the die fixing member 64b descends to a predetermined position where it does not hinder the replacement of the die 6b.

In such a state, the tool changer 40 (see FIGS. 3 and 4)
Tool exchange is carried out with the figure. Further, at the time of exchanging tools, as shown in FIG. 3, the exchanging is performed at a predetermined angle θ with respect to the apparatus central axis line 1. Therefore, it is necessary to correct the angles of the punch and the die, for example, when performing a square hole drilling operation. Therefore, the worm 82a,
82b and worm wheel (iddenx mechanism 80a, 80b)
The die head holders 76a and 76b are rotated by a predetermined angle θ. This angle correction operation is similarly performed in the punch head section.

On the other hand, the lowering of the die head 70b causes an opening concave portion on the work table surface. The movement of the lid that closes the opening recess will be described below.

As shown in FIGS. 1A to 1C, when the die 6b is lowered, an opening concave portion 26 is formed in the opening 20 portion of the fixed table 14. At this time, the lid 90 and the lid moving mechanism 100 are moved to the retracted position below the fixed table 14.

Next, the cylinder 103 of the lid moving mechanism 100 is driven to cause the cylinder rod 103a to project. Along with the protrusion of the cylinder rod 103a, the U-shaped member 106 at the tip of the cylinder rod 103a also protrudes, and the member 107a that engages with this member 106, that is, the flat plate member 107, moves forward (left side in FIG. 1B). Flat plate member 1
With the movement of 07, the pins 105a and 105b of the slide member 104, on which the flat plate member 107 is mounted, respectively have guide grooves 101a and 101b.
It moves forward while engaging inside. This slide member 104
Along with the movement of, the lid 90 attached to the tip also moves forward.

After the slide member 104 has moved a predetermined amount in the horizontal direction,
Pins 105a and 105b are aligned along the guide grooves 101a and 101b, respectively.
It moves diagonally forward by being lifted diagonally upward in Figure 1B. At this time, the rear end of the cylinder 103 is
It is rotatably connected to 01 by a pin 102,
The U-shaped member 106 at the tip of the cylinder rod is rotatably connected to a member 107a fixed to the slide member 104 side by a pin 108. Therefore, the slide member
104 moves smoothly. Then pins 105a, 105b
By moving in the guide grooves 101a and 101b in the horizontal direction, the slide member 104 moves forward in the horizontal direction by a predetermined amount. As a result, the lid 90 attached to the tip of the slide member 104 enters the opening recess 26 of the fixed table 14 (closed position), and the opening 20 is closed. Therefore, when the work is being processed by the other die head 76a, the end of the work or the processing point is
It is possible to prevent a person from being caught in the fixed table opening 20 of 70b and being caught.

After the tool exchange is completed, the exchanged die is fixed. That is, as shown by the die head 70a on the left side in FIG. 2, oil is introduced into the hydraulic chamber 61a through the oil passage 65a. This hydraulic pressure causes the piston 62a and the die fixing member 64a.
Moves upward and the die 6a is fixed. At this time, the die fixing member 64a not only moves upward, but also moves so as to press the die 6a toward its center side to prevent rattling of the die 6a. Then, when processing is performed using this die head 70a, oil is introduced into the lower hydraulic chamber 72a through the oil passage 74a (solid line arrow in the figure), whereby the piston portion 75a,
That is, the die head 70a moves up to the processing position.

Hereinafter, by repeating the same operation, tool exchange and machining are performed.

In this embodiment like this, the die heads 70a, 70b rise during machining, and when non-machining such as tool exchange, descend to a retracted position below the machining position, so the die on the non-machining side does not come into contact with the workpiece, As a result, it is possible to prevent the work from being damaged by the die on the non-working side, and it is possible to easily perform tool exchange. Further, since the work table surface opening concave portion 26 caused by the die on the non-machining side being recessed below the work table surface is closed by the lid body 90, when the machining is performed by one machining head portion, It is possible to prevent the end portion and the processed portion from being immersed in the opening concave portion 26 and being caught.

[Other Examples]

(A) In the above embodiment, the die head is moved up and down by hydraulic drive, but it may be mechanically driven.

〔The invention's effect〕

In the twin head punch press machine according to the present invention, the opening concave portion caused by the immersion of the unprocessed die is closed by the lid body, and therefore, when the processing is performed by one processing head portion, the opening concave portion It is possible to prevent the work from being caught.

[Brief description of drawings]

FIG. 1A is a plan view of a lid and a lid moving mechanism according to an embodiment of the present invention, FIG. 1B is a side view, FIG. 1C is a schematic view taken along arrow Z of FIG. 1B, and FIG. 2 is a cross section of a die head portion. FIG. 3 is a schematic configuration diagram, FIG. 3 is a diagram for explaining a tool changing system, FIG. 4 is a partial sectional side view of the same, and FIG. 5 is an overall configuration diagram of a twin head punch press machine according to an embodiment of the present invention. is there. 5 ... Punch, 6 ... Die, 20 ... Open hole, 26 ... Opening recess, 30,31 ... Head part, 70a, 70b ... Die head, 90 ...
… Lid, 100 …… Lid moving mechanism.

Claims (1)

(57) [Claims] 1. A machining head portion comprising a punch and a die.
Twin head punch press machine which has a group and selectively processes the same work while moving the work on a shared work table, and immerses an unprocessed die below the work table. And a lid capable of closing a work table surface opening concave portion caused by the die being immersed, a closing position for closing the work table surface opening concave portion, and a retreat for opening the opening concave portion. A twin-head punch press equipped with a lid moving mechanism for moving between positions.