JPH0432193Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a double-ended machine tool equipped with an automatic tool changer.

[Conventional technology]

Conventionally, a machine tool such as a single-head boring machine is equipped with an automatic tool changer.
Generally, the one shown in FIG. 5 is known.

In the figure, 21 is a boring machine, 22 is a chain-type tool magazine, and 23 is a tool magazine 2.
This is an arm changer that transfers the tool K between the boring head 2 and the boring head 21a. The arm changer 23 moves in the X direction, and one end thereof grabs the tool K to be replaced on the tool magazine 22.
Return to the original position again, rotate and move in the Y direction, and attach the tool K to the boring head 21a. The tool K that has been attached to the boring head 21a and has finished machining is grabbed by the other end of the arm changer 23, and
During the operation, it is passed to the tool magazine 22.

In addition to the above-mentioned chain-type tool magazines, for example, one disclosed in Japanese Patent Laid-Open No. 59-42242 is known.

[Problem that the invention attempts to solve]

By the way, in order to drill holes in a workpiece with high efficiency, it is possible to use a double-headed boring machine that processes both sides of the workpiece at the same time.
If a conventional technique is used to automatically exchange tools in a double-headed boring machine, it is necessary to arrange two chain-type tool magazines 22 facing each other. This requires a large installation space around the boring machine, which is unfavorable in terms of factory layout.

[Purpose of invention]

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a machine tool with an automatic tool changer that can restrict the installation space around the machine.

[Means for solving problems]

In order to achieve the above object, the present invention has a double-headed machine tool that simultaneously processes both sides of a workpiece, and a magazine that reciprocates horizontally on a guide rail provided on the base of the double-headed machine tool. A truck is provided, and the magazine truck is provided with a pair of rotary plate type tool magazines to which a plurality of tool holders for gripping tools are attached, and an actuator for rotating the rotary plate type tool magazines. It is used to transfer tools to and from the tooling head holder of a double-headed machine tool.

[Effect of invention]

According to the present invention, tools are transferred between the tool holders of a pair of rotary plate tool magazines provided on one magazine cart and the tooling head holder of a double-headed machine tool, so that tools can be exchanged easily. The space for reciprocating the rotary plate type tool magazine is sufficient. Therefore, installation space for exchanging tools can be saved.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a machine tool with an automatic tool changer according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a double-headed boring machine, and a pair of boring units 1A and 1B are arranged facing each other. Reference numeral 2 denotes a pallet on which the workpiece W is mounted, and 3 a table lifter that raises and lowers the pallet 2 from the workpiece conveyance line.

Reference numeral 4 denotes a guide rail provided on the base 5 via a fixed table 5a, and on this guide rail 4 is provided a magazine cart 7 which is reciprocated in the horizontal direction by a transport cylinder 6. A fixed lever 7a is provided at the tip of the magazine truck 7 so that it can freely engage the pallet 2, and the pallet 2 is configured to reciprocate in synchronization with the movement of the magazine truck 7.

The magazine cart 7 is provided with a pair of rotary plate type tool magazines 8 and a hydraulic motor (actuator) 10 for rotating the rotary plate type tool magazines 8 through a conduction chain 9. Six tool holders 1 are arranged around the periphery of each rotary plate type tool magazine 8.
1 are mounted at equal pitches, and this tool holder 11 is adapted to grip a tool K to be set in the tooling head holding portion 1a of the boring units 1A, 1B. The tool K is transferred between the tool holder 11 and the tooling head holding portions 1a of the boring units 1A, 1B. Note that 12 indicates an intermediate stopper.

FIG. 4 shows a detailed cross section of the tooling head holding portion 1a in which the tool K is set.

As illustrated, the tool K includes a tool body K1, an annular groove K2 held by the tool holder 11,
It is composed of a taper part K3 and a quill part K4. The quill portion K4 consists of a small cylindrical portion K5 and a protruding shing body K6 provided at the tip thereof.

The tooling head holding portion 1a is formed with a tapered hole portion 1b and a through hole 1c continuous thereto,
The cylindrical portion 1d is fitted into the through hole 1c, and further,
A pull stud 1e is slidably incorporated into this cylindrical portion 1d. Pull stud 1e has groove 1
The ball 1g that has fallen into the groove 1f pulls the projecting ring K6 formed at the tip of the tool K using hydraulic pressure with the pull stud 1e, thereby holding the tool K in the tooling head holding portion 1a.

Next, the operation of this embodiment will be explained.

Figures 1 and 2 show a state in which the magazine truck 7 is in a backward position during boring. When the boring process is completed, the magazine truck 7 moves forward (as shown in Figure 3), and the pallet 2 carrying the workpiece W is transferred to the magazine. The fixed lever 7a of the trolley 7 is used to pull it out to the transport position. Next, the table lifter 3 is raised, and the presence or absence of the workpiece W is checked. If there is a workpiece W, a lamp (not shown) is lit and the workpiece W is pulled out from the table lifter 3 to the conveyance line. In this case, if the drilling dimensions of the next workpiece are the same, tool K
There is no need to replace the holes, but if the hole dimensions are different, perform the automatic replacement cycle shown below.

First, the table lifter 3 descends (step (1)).
By engaging the fixed lever 7a with the pallet 2 and retracting the rotary plate type tool magazine 8, the workpiece W is drawn into the processing position. ((2) Process). Next, the intermediate stopper 12 rises (step (3)), the boring units 1A, 1B move forward, and the intermediate stopper 12 moves forward.
It stops when it comes into contact with ((4) step). In the (5) process, the rotary plate type tool magazine 8 rotates to select (automatically index) the necessary tool K. Then, the tool K is loosened by the tool holder 11 of the rotary plate type tool magazine 8 (step (6)), and in this state, the rotary plate type tool magazine 8 moves forward (step (7)). (8) In the process,
Pull guide 1e of touring head holding part 1a
is loosened so that the machined tool K can be pulled out from the tooling head holding portion 1a. Next, the tool K in this state is tightened by the tool holder 11 (step (9)), and the boring units 1A and 1B are moved back. Therefore, the machined tool K is extracted from the tooling head holding portion 1a and becomes empty (step (10)). (11) In the process, tool holder 1
1 rotates the rotary plate type tool magazine 8 that grips the machined tool K, and the tool K prepared in advance is rotated.
to the processing reference position (automatic indexing). Next, the process proceeds to step (12), where the boring units 1A and 1B move forward to loosen the holding state of the tool K for the next machining process, which is held by the tool holder 11 of the rotary plate type tool magazine 8 (step (13)). ), and at the same time pull stud 1 of touring head holding part 1a.
When e is loosened, the tool K is transferred from the tool holder 11 side to the tooling head holding section 1a (step (14)). After this, the rotating plate type tool magazine 8 is moved back (step (15)), the tool holder 11 of the rotating plate type tool magazine 8 is brought into a tightened state, and the boring units 1A and 1B are moved back (step (16)). The intermediate stopper 12 is lowered, the automatic tool exchange cycle is completed, and the boring process begins.

According to the above configuration, the tool K is transferred between the tool holder 11 of the pair of rotary plate type tool magazines 8 provided on one magazine cart 7 and the tooling head holding portion 1a of the double-headed boring machine 1. Therefore, the space in which the rotary plate type tool magazine 8 reciprocates is sufficient as the space for exchanging the tools K. Therefore, as shown in Figure 1,
No equipment for tool exchange occupies space on both sides of the boring units 1A, 1B, so the installation space for automatically exchanging the tool K can be saved, and the layout of the factory can be improved.

In this embodiment, a boring machine is used as an example of a double-headed machine tool, but the present invention is not limited to this and can be applied to, for example, a milling machine.

[Effect of idea]

As described above, according to the machine tool with an automatic tool changer according to the present invention, the mounting space around the machine for automatically changing tools can be saved, and the layout of the factory can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view of a machine tool with an automatic tool changer according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG.
4 is a sectional view of a tool attached to a tooling head holder of a boring machine, and FIG. 5 is a side view of a conventional machine tool with an automatic tool changer. 1...Double-headed boring machine, 1A, 1B...
Boring unit, 1a...Touring head holding part, 2...Pallet, 3...Table lifter, 4...Guide rail, 5...Base, 6...Transport cylinder, 7...Magazine cart, 7a...Fixed Lever, 8...Rotary plate type tool magazine, 10...
Hydraulic motor, 11...tool holder, K...tool.

Claims (1)

[Scope of utility model registration request] A double-headed machine tool that simultaneously processes both sides of a workpiece is installed, and a magazine cart that reciprocates horizontally is installed on a guide rail provided on the base of the double-headed machine tool, and the tool is gripped on this magazine cart. A pair of rotary plate type tool magazines to which a plurality of tool holders are attached and an actuator for rotating the rotary plate type tool magazines are provided, and the tool holder of the rotary plate type tool magazine and the tooling head holding part of the double-headed machine tool are provided. A machine tool equipped with an automatic tool changer, which is characterized by the fact that tools are transferred at the machine.