JPH0356130B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a twin-head punch press machine having two sets of head sections each consisting of a punch head and a die head.

[Conventional technology]

In general, a punch press machine is a machine tool for sheet metal processing that performs drilling, forming, etc. on steel plates, etc., and a punch tool (hereinafter referred to as
It has a die tool (hereinafter simply referred to as a die) as a holder thereof.

In such punch press machines, turret type punch press machines have conventionally been used to improve machining efficiency. In this turret type punch press machine, multiple types of punches and dies are arranged in, for example, a disk-shaped turret, and these are sequentially moved to a working position according to a preset work process, and are then moved by an appropriate means. The machine is connected to a drive device to perform processing. According to such a turret type punch press machine, various types of processing can be performed in a short time with one machine tool.

[Problem to be solved by the invention]

By the way, recently there has been a demand for FMS (Flexible Production System), that is, the efficient and automatic production of a wide variety of products in small quantities, and the conventional turret-type punch press machine cannot cope with the variety of types. It's starting to disappear.

Therefore, instead of performing work using multiple types of fixed tools as in the conventional turret type, the applicant developed a head part for performing work, a tool changing device for changing tools in this head part, and various types of tools. A punch press machine is provided with a tool accommodating part that accommodates a large amount of tools in one device, and the tools in the tool accommodating part can be attached to and removed from the fixed head part as necessary. developed.

If the heads of such a punch press machine have a twin structure, it is possible to perform work on one head while simultaneously changing the tool on the other head, which virtually eliminates the time required to change tools. This means that productivity can be further improved.

However, when constructing a punch press machine with such a twin-head structure, simply providing two heads in a conventional turret-type device would cause the material (workpiece) to be There is a risk of injury.

The object of the present invention is to enable tools to be exchanged on one head while machining work is being performed on the other head without damaging the workpiece being machined;
Another object of the present invention is to provide a twin-head punch press machine that can hold more tools in a compact space as a tool changer.

[Means to solve the problem]

The twin head punch press machine according to the present invention includes:
It has two sets of heads, and the tool on one head can be replaced while the other head is being processed.Two punch heads each have a punch attached to them, and they are placed opposite each punch head. is,
two die heads each equipped with a die;
It has an index mechanism. The die head is rotatable and can be raised and lowered so that it can be at a predetermined height during processing and at a retracted position lowered from the processing position when not being processed. The index mechanism is a mechanism for positioning each die head at a predetermined angular position.

[Effect]

In the twin-head punch press machine of the present invention, while one head is being processed, the die head of the other head, which is not being processed, is moved down a predetermined distance from the processing position to a retracted position. The die in this retracted position is in a non-contact state with the workpiece being machined, and therefore the workpiece being machined can be prevented from being damaged.

Furthermore, the die that has been lowered to the retracted position can be replaced. At the time of exchange, even if the two head sections are arranged in a straight line, since the indexing mechanism is provided, tools can be transferred radially from the tool exchange device. Therefore, tools can be arranged circumferentially in the tool changer, and more tools can be held in a compact space.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. First, the overall structure of the twin-head punch press developed by the applicant will be explained using FIG. 2. The twin head punch press machine shown in the perspective view of FIG. 2 is mainly composed of a lower frame 1, an upper frame 2, and a throat section 3 that supports these at the rear. The lower frame 1
includes a carriage 12 on which a work holder 11 for holding a work is slidably attached, left and right movable tables 13a and 13b, and a fixed table 1.
4 etc. are provided, and the carriage 12 and left and right moving tables 13a, 13b are connected to the lower frame 1.
The ball screw 16 and the like provided on the base 15 of the machine allow the machine to move forward and backward along the rail 17. Further, the upper frame 2 is provided with a motor 21 for driving the punch, 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. It is being

Two punch heads are attached to the front end of the upper frame 2 and are selectively reciprocated by the crank mechanism 24 via a selection mechanism, and are attached to the lower frame 1 facing each punch head. Two sets of head parts 30 together with the dies
a and 30b are configured.

The lower frame 1 and the upper frame 2 include
A tool changer (FIG. 2 shows only the punch and die attached to this tool changer) is provided, and a head portion is connected to the rear of the tool changer, that is, at the throat 3 portion, through the tool changer. A tool storage section (tool magazine) is provided for accommodating punches and dies to be supplied to the machine.

FIGS. 3 and 4 show head portions 30a, 30b,
The relationship between the tool changer 40 and the tool magazine 50 is shown, with FIG. 3 being a schematic plan view thereof, and FIG. 4 being a sectional side view thereof. As shown in Figure 3,
The head parts 30a and 30b are arranged in parallel, the punches or dies are arranged in a circular shape in the tool changer 40, and the punches or dies are arranged in a circular manner in the tool magazine 50 so as to surround the throat.

As shown in FIG. 4, the tool changing device 40
A punch exchange section 40a provided on the upper frame 2 side, a die exchange section 40b provided on the lower frame 1 side, and a motor 4 for driving these.
1, a transmission member 42, and a drive mechanism 40c including a rotating shaft 43 and the like. The punch exchange section 40a and the die exchange section 40b each have a pulley 45 rotated by the drive mechanism 40c, and disk sections 46a and 46b are fixed to the pulley 45. The disk portions 46a, 46b are provided with holding mechanisms 47a, 4 for holding the punch 5 or the die 6.
7b are arranged at predetermined intervals, and these holding mechanisms 47a, 47b can be moved forward and backward in the radial direction by a forward and backward movement mechanism (not shown).

Further, the tool magazine 50 is connected to the tool changing device 4.
Similarly, it consists of a punch accommodating part 50a provided on the upper frame 2 side and a die accommodating part 50b provided on the lower frame 1 side, and each accommodating part 50a,
50b has a transmission device 51 consisting of a sprocket, a chain, etc., and holding mechanisms 52a and 52b arranged on this transmission device 51 at a predetermined interval. The punch 5 or the die 6 is held by the holding mechanisms 52a and 52b.

Next, the die head section that holds the die 6 will be explained in detail with reference to FIG. At a predetermined portion of the lower frame 1, two cylinder portions 18a,
18b is provided, each cylinder portion 18a, 1
Die heads 70a and 70b are fitted into the die head 8b so as to be movable up and down by hydraulic pressure. That is, the inner walls of the cylinder parts 18a, 18b and each die head 70a,
Seal rings such as O-rings are provided on the outermost piston portions (described later) of 70b, and upper hydraulic chambers 71a, 71
b and lower hydraulic chambers 72a, 72b are formed. And each hydraulic chamber 71a, 71b, 72a,
Oil passages 73a, 73b, 74 are provided in 72b, respectively.
a, 74b communicate with each other, and hydraulic oil from an external oil supply pump is introduced into each of the hydraulic chambers 71a, 71b, 72a, 72b via a control valve or the like.

The die head will be explained below, but since the two die heads have similar configurations, only one of them will be explained. The die head 70a has a hollow piston portion 75a at its outermost periphery,
A bearing 83a is provided inside this hollow piston portion 75a.
A holder 76a is rotatably inserted through the holder 76a. This holder 76a is formed in a hollow shape so that the punched slag etc. can be discharged, and the die 6a is placed on the upper part of the holder 76a.

The holder 76a also has a die fixing mechanism 6 for fixing the die 6a placed on the holder 76a.
0a is provided. This die fixing mechanism 60a
is a hydraulic chamber 61 formed in a part of the holder 76a.
a, and a piston 62a fitted into the hydraulic chamber 61a via a seal ring so as to be able to rise and fall freely, and this piston 62a has a piston rod 63.
a is fixed, and furthermore, this piston rod 63a
A die fixing member 64a is attached to the top end of the die fixing member 64a. An oil passage 65a is provided in the hydraulic chamber 61a.
are in communication with each other, and oil is supplied from a rotary joint 66a provided at the bottom of this holder 76a.

Further, an index mechanism 80a for rotating the holder 76a to adjust the angle is disposed approximately at the center of the holder 76a. This index mechanism 80a is composed of a main body portion 81a on which a worm wheel is formed, and a worm 82a that engages with the worm wheel.
The main body portion 81a is slidable via the body of the holder 76a and the key 77a, and is rotatable together with the holder 76a with respect to the lower frame 1 via a bearing 84a.

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

Next, the operation will be explained. First, the operation of the entire apparatus will be briefly explained with reference to FIG. Since the movement of the workpiece is the same as the conventional method, the explanation will be omitted here.

To drive the punch, a flywheel 23 is rotated by a drive motor 21, and a crank mechanism 24 is rotated via a clutch mechanism or the like. At this time, one of the two punch heads 30a, 30b is selected by the selection mechanism provided at the lower part of the crank mechanism 24, and the driving force is therefore transmitted to the selected punch.
Operations such as drilling holes are performed by raising and lowering the punch. On the other hand, the tools of the punch and die that are not selected are replaced during this non-machining period.

Next, the tool exchange operation will be explained, particularly focusing on the tool supply operation.

The punch and die tools are housed in pairs in a tool magazine 50, as shown in FIGS. 3 and 4. In the tool magazine 50, a desired pair of tools is rotated by a transmission device 51 to a tool exchange position (the position indicated by arrow A in FIG. 3). At this time, the punches and dies are conveyed in pairs so that incorrect combinations of punches and dies are not supplied. Next, at this tool changing position, the punch changing section 40a of the tool changing device 40
and a holding mechanism 47 provided in the die exchange section 40b.
a and 47b respectively protrude toward the tool magazine 50 side by a reciprocating mechanism, grip the punch 5 and die 6 of the tool magazine 50, and take them into the tool exchanger 40 side. In the tool changing device 40, each disc portion 46a, 46b is rotated, for example, 180 degrees as shown in FIG. 3 from the tool changing position, and each tool is moved to the tool changing position with the head portion 30b. And each exchange part 40a, 40b of tool exchange device 40
perform substantially the same operations as described above, and a desired pair of tools is delivered to the head section 30b.

Note that the tool is recovered by an operation that is almost the reverse of the above-mentioned operation.

During these tool exchange operations, the die head on the side where the tool is exchanged, that is, the die head when not being machined, is lowered from the machining position to the retracted position. The raising and lowering operation of this die head will be explained below.

As shown by the die head 70b on the right side of FIG. 1, when the die head 70b is lowered, oil is introduced into the upper hydraulic chamber 71b via the oil passage 73b (dashed line arrow in the figure), thereby causing the piston portion 75
b, that is, the die head 70b is lowered from the processing position shown on the left side of FIG. 1 to a retracted position, for example, 4 cm below (the state shown on the right side of the figure). At the same time, oil is supplied to the upper part of the piston 62b of the hydraulic chamber 61b, and the piston 62b is lowered to lower the die fixing member 64b to a predetermined position where it does not interfere with exchanging the die 6b. In this state, tools are exchanged with the tool exchange device 40.

When the tool exchange is completed in this manner, the die is first fixed. That is, as shown by the die head 70a on the left side of FIG. 1, oil is introduced into the hydraulic chamber 61a through the oil passage 65a, and the piston 62a
Then, the die fixing member 64a is moved upward to fix the die 6a. At this time, the die fixing member 6
4a not only rises, but also acts to press the die 6a toward its center, thereby preventing the die 6a from wobbling. And this die head 70a
When machining is performed using the die head 70a, oil is introduced into the lower hydraulic chamber 72a through the oil passage 74a (solid arrow in the figure), thereby raising the piston portion 75a, that is, the die head 70a to the machining position.

Further, when exchanging the tools, as shown in FIG. 3, the exchanging is performed at a predetermined angle θ with respect to the central axis l of the device. Therefore, when performing square hole drilling work, for example, it is necessary to correct the angles of the punch and die. Therefore, warm 8
2a, 82b and the worm wheel (index mechanism 80), the die head holder 76
a and 76b are rotated by a predetermined angle (the above θ).
Of course, this angle correction operation is performed in the punch head section as well.

Thereafter, tool exchange and machining are performed by repeating similar operations.

In this embodiment, the die head 70a,
70b rises during machining, and descends to the retracted position below the machining position when not machining, such as when changing tools, so the die on the non-machining side is out of contact with the workpiece, and the die on the non-machining side No more damage to the workpiece. In addition, tools can be easily replaced, and there is no need to stop the work table every time a tool is replaced, unlike in the past, and productivity can be improved.

In addition, when performing molding processes such as embossing with conventional turret-type equipment, the die has a protruding part, so when performing other processes, it is necessary to remove the die for this molding process, and It was necessary to consider the order of the steps. However, in the device of this embodiment, since the die is lowered, the molding die described above can be replaced without any consideration, and since it does not come into contact with the workpiece, so-called flapping occurs. can be prevented.

Furthermore, in a twin head structure in which the heads are arranged in a straight line, it is normally necessary to arrange the tools in a straight line on the tool changer side as well, but in this example, the head part is equipped with an index consisting of a worm wheel and a worm. Since it has a mechanism, it is possible to transfer tools radially from the tool changer to the twin heads arranged in a straight line, compared to the above-mentioned one where the tools must be held in a straight line. You can hold more tools in a compact space. Additionally, if you use this indexing mechanism, when drilling holes of the same shape but at different angles, for example, by 90 degrees, you can do it with one pair of tools, reducing the number of tools required. .

In the above embodiment, the die head is raised and lowered by hydraulic drive, but this may be mechanically driven, and the same effects as in the above embodiment can be obtained. Further, in the case of hydraulic drive, the mechanism is not limited to the mechanism of the above embodiment, and various configurations are possible.

Furthermore, in the embodiments described above, the present invention was applied to a punch press machine having a head section, a tool changer, and a tool storage section.
Of course, the present invention can also be applied to other twin-head punch press machines.

〔Effect of the invention〕

As described above, according to the present invention, in a twin-head punch press machine, the die head is lowered from the processing position to the retracted position when not being processed, so that the die that is not being processed is in a state where it is not in contact with the workpiece. This prevents the workpiece from being damaged.
Furthermore, since the die head can be rotated during die exchange, tools can be delivered radially from the tool changer to two linearly arranged die heads, and the tools can be arranged circumferentially in the tool changer. Therefore, in the tool exchange device, more tools can be held in a compact space.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a die head section applied to a twin-head punch press machine according to an embodiment of the present invention, FIG. 2 is an overall configuration diagram of the twin-head punch press machine, and FIG. 3 is a diagram of the twin-head punch press machine. A diagram to explain the tool change system of the machine,
FIG. 4 is a partially sectional side view for explaining the tool exchange system. 5...Punch, 6...Die, 30a, 30b...
...Head part, 70a, 70b...Die head.

Claims (1)

[Scope of Claims] 1. A twin-head punch press machine having two sets of heads, each of which is equipped with a punch, in which the tool of one head can be replaced while the other head is being processed. Two punch heads, which are arranged opposite to each of the punch heads, are rotatable, and are movable up and down so that they can take a predetermined height position during processing and a retracted position lowered from the processing position when not processing, and each has a die. A twin-head punch press machine comprising: two die heads to which die heads are mounted; and an index mechanism for positioning each die head at a predetermined angular position.