JP2021094636A - Pallet exchange device of machine tool - Google Patents

Abstract

To provide a revolving type pallet exchange device of a machine tool whose lower part can be cleaned.SOLUTION: A pallet exchange device M comprises: a revolving part 2 comprising a revolving arm 21 for holding and revolving a pallet 1 and a revolving door 22 that partitions a machining chamber and a non-machining chamber; and a base part 3 rotatably mounted with the revolving part 2. Discharging means 8, 8, 8 and 8 that can discharge cutting liquid toward an upper surface of the base part 3 are provided at lower ends of piping 6 and 6 provided at the revolving part 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a swivel pallet changing device used in a machine tool such as a machining center.

As an automatic pallet changing device used in a machine tool such as a machining center, a swivel type as disclosed in Patent Document 1 is known. In such a swivel type pallet changing device, if chips generated by machining the work are left to be accumulated on the grip portion of the pallet, the chips are caught between the grip portion and the pallet, and the gripped pallet is tilted. There is a risk of doing. Further, if the turning operation is performed while the pallet is tilted, the pallet may fall off. Therefore, the importance of cleaning the grip portion before performing the swivel operation for pallet replacement is widely recognized. For example, a device that automatically cleans the grip portion in accordance with the swivel operation is disclosed (patented). Document 2).

Japanese Unexamined Patent Publication No. 4-8448 Japanese Unexamined Patent Publication No. 10-118883

On the other hand, chips generated by machining the work are scattered and accumulated not only on the upper surface of the swivel pallet changing device but also on the periphery including the lower surface thereof. However, with the cleaning method of ejecting the cleaning liquid from above as described above, it is difficult to remove the chips that have entered the gap between the pallet changing device and the base. In particular, if chips accumulate below the pallet changing device, that is, on the upper surface of the base that supports the pallet changing device, not only may the device be damaged during turning, but it may also cause a failure. Therefore, the lower part of the pallet changing device. There was a demand for a device that could be washed up to.

Therefore, an object of the present invention is to provide a pallet changing device for a machine tool capable of cleaning the lower part of the device.

In order to achieve the above object, the invention according to claim 1 is a swivel portion including a swivel arm for gripping and turning the pallet, a swivel door for separating a processing chamber and a non-processing chamber, and a swivel portion. Is a pallet changing device including a base portion rotatably attached to the door, and is characterized in that a discharge means capable of discharging a fluid toward the upper surface of the base portion is provided at the lower end of the swivel portion.
The invention according to claim 2 is characterized in that, in the configuration of claim 1, the discharge means is provided at the lower end of the swivel door.

According to the inventions of claims 1 and 2, chips that have entered between the swivel portion and the base portion can be easily removed.

It is a perspective view which shows the pallet exchange apparatus of embodiment of this invention. It is a top view of the pallet exchange device in this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a pallet changing device according to an embodiment of the present invention.
The pallet changing device M used in a machine tool such as a machining center is a swivel portion including a swivel arm 21 for gripping and swiveling the pallet 1 (FIG. 2) and a swivel door 22 for separating a machining chamber and a non-machining chamber. 2 is provided, and the swivel portion 2 is mounted on the base portion 3 by a rotating shaft 23. Pipes 6 and 6 extending in the vertical direction are provided at both ends of the swivel door 22, and joints 7 and 7 are provided above the pipes 6 and 6, respectively. Further, at the lower end of the pipes 6 and 6, a discharge means (nozzle) that opens diagonally downward along the tangential direction of the circle C (shown by the broken line in FIG. 2) drawn by the pipes 6 and 6 due to the rotation of the swivel portion 2. 8,8,8,8 are provided.
Further, as shown in FIG. 2, the pallet changing device M is provided with the machine cover 4 so that chips and cutting fluid do not scatter around the pallet changing device M, and the swivel portion 2 and the machine cover 4 are provided. The processing chamber and the non-processing chamber are separated from each other by being sealed by the labyrinth 5. At this time, the means for separating the processing chamber and the non-processing chamber is not limited to the labyrinth 5, and an elastic body or the like attached so as to come into contact with the machine cover 4 may be used, and chips from the processing chamber to the non-processing chamber may be used. If the infiltration of cutting fluid and cutting fluid can be prevented, the means is not limited.

For cleaning between the swivel portion 2 and the base portion 3, the cutting fluid supplied from the outside of the machine cover 4 is connected to the joints 7 and 7 so as to allow the swivel portion 2 to rotate (not shown). ), And is guided by the pipes 6, 6 and discharged from the discharging means 8, 8, 8, 8 toward the upper surface of the base 3.

In the pallet changing device M of the above embodiment, the swivel portion 2 including a swivel arm 21 for gripping and swiveling the pallet 1 and a swivel door 22 for separating the processing chamber and the non-processing chamber, and the swivel portion 2 can rotate. At the lower ends of the pipes 6 and 6 provided in the swivel portion 2, the discharge means 8, 8, 8 and 8 capable of discharging the cutting fluid toward the upper surface of the base 3 are provided. Be done.
According to the pallet changing device M having such a form, the cutting fluid discharged from the discharging means 8, 8, 8, 8 can easily remove the chips that have entered between the swivel portion 2 and the base portion 3. Become.

The above is a description of the present invention based on the illustrated examples, and the technical scope thereof is not limited to this.
For example, the position where the discharge means is provided may be arbitrarily set as long as the upper surface of the base can be cleaned. Similarly, the opening direction of the discharge means can be arbitrarily set.
Further, the piping path to the discharge means can be arbitrarily arranged as long as it does not interfere with the rotation of the swivel portion. For example, the pipe may be arranged along the lower end of the swivel door via the rotating shaft.
Further, the discharged fluid is not limited to the cutting fluid, and for example, chips may be blown off with air.

M ... pallet changing device, 2 ... swivel part, 21 ... swivel arm, 22 ... swivel door, 3 ... base, 6 ... piping, 8 ... discharge means.

Claims (2)

A pallet changing device including a swivel arm for gripping and turning a pallet, a swivel door for separating a processing chamber and a non-processing chamber, and a base portion to which the swivel portion is rotatably attached. hand,
A machine tool pallet changing device characterized in that a discharge means capable of discharging a fluid toward the upper surface of the base portion is provided at the lower end of the swivel portion. The pallet changing device for a machine tool according to claim 1, wherein the discharging means is provided at the lower end of the swivel door.

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