JPH10529A - Cutting agent scattering preventing cover in machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate scattering leakage of a cutting agent generated during the machining of a workpiece, by generating a space smoothing operation between turn operation and lift operation of a pallet changer, and, after once ending the replacement of a pallet, sealing an opening part of a cover so as to prevent the generation of a clearance. SOLUTION: A seal plate 30 sealing a clearance between a fixed cover 21 and a movable cover 23 in an opening part 22 is provided so as to move to be associated with a motion of the movable cover 23, and the seal plate 30 is sealed so as to generate a space permitting the rotation of the movable cover 23 in the opening part with lifting of the movable cover 23 and to generate a lapping margin in a space between the fixed cover 21 and the movable cover 23 with lowering of the cover 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting agent scattering prevention cover for a machine tool, and more particularly, to a cutting agent scattering cover for a machine tool while rotating 180 degrees.
The present invention relates to a cover which surrounds a processing portion and prevents scattering of a cutting agent in a machine tool provided with a rotary pallet changer for exchanging two pallets.

[0002]

2. Description of the Related Art Conventionally, in a machine tool, in order to prevent the environment of a factory from deteriorating due to scattering of a cutting agent used during processing of a workpiece, the entire surface of a processing section such as a table is covered. Then, a cover for preventing scattering of the cutting agent is provided. In addition, machine tools such as NC machine tools and machining centers are provided with a pallet changer so that a workpiece can be placed on a pallet and the pallet after processing can be quickly replaced with a pallet at a standby position. Is common. FIG. 5 is a view showing a conventional cutting agent scattering prevention cover used for a machine tool having a rotary pallet changer. Reference numeral 1 denotes the entire cover for preventing the scattering of the cutting agent, and reference numeral 2 denotes a column of a machine tool. Numeral 3 denotes a pallet changer of the pallet changer,
The pallet swivel unit 3 performs a 180-degree swivel operation and a constant stroke elevating operation, and replaces the pallet P1 on which a workpiece has been processed with a pallet P2 at another standby position.

[0003] The cutting agent scattering prevention cover 1 is provided so as to completely surround a processing portion of a machine tool into which a pallet is carried by a pallet changer, and an opening 4 for pallet exchange is formed on the front surface thereof. ing. In the conventional cutting agent scattering prevention cover 1, a door 5 is provided upright on the pallet turning section 3 of the pallet changer so as to close the opening 4.

[0004]

In the conventional cutting agent scattering prevention cover, since the door 5 is fixed to the pallet turning portion 3, when the pallets P1 and P2 are replaced, the door 5 rotates and rotates together with the pallet turning portion 3. It moves up and down. For this reason, in the opening 4 of the cover 1, a gap is provided in advance on the upper side of the door 5 and on both the left and right sides so that the vertical movement and the rotation of the door 5 are allowed.

[0005] Such a gap is necessary for smooth replacement of the pallet, but on the other hand, the cutting agent scatters from the gap to the outside of the cover 1 to obtain a sufficient sealing performance. There was a big problem that could not be done.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a gap for smoothing the operation between the turning operation and the elevating operation of the pallet changer. After the
Cutting agent splattering eliminates the leakage of cutting agent generated during machining of workpieces by forming a closed state in conjunction with the operation of the pallet changer so that there is no gap in the opening of the cover It is to provide a prevention cover.

[0007]

In order to achieve the above object, the present invention provides a pallet changer for exchanging a plurality of pallets at symmetrical positions with respect to a center of rotation by a vertical movement and a horizontal rotation movement of a pallet swivel. A fixed cover, which is disposed on the machine tool provided, and is formed so as to surround a pallet located on the processing unit side of the machine tool and a moving range of the tool, a pallet at the processing position and a pallet at the standby position; In the cutting agent scattering prevention cover which is provided at the opening of the fixed cover so as to partition the pallet and the movable cover which operates integrally with the pallet turning portion, the gap between the movable cover at the opening of the fixed cover and A seal plate to be sealed is provided so as to move in conjunction with the movement of the movable cover, and the seal plate is opened with the rise of the movable cover. Causing a gap to allow rotation of the movable cover, along with lowering of the movable cover, it is characterized in that it has to produce a margin overlapping the gap between the stationary cover and the movable cover.

[0008] According to a preferred embodiment of the cutting agent scattering prevention cover of the present invention, the seal plate is hung on both left and right sides of the movable cover via hooks, and the seal plate is lifted when the movable cover is raised. The seal plate is inclined so as to guide the seal plate in a direction in which the gap is widened, and is slidably engaged with a guide member fixed to the fixed cover side.

An upper seal plate is connected to an upper side edge of the movable cover, and when the movable cover is raised, the upper seal plate is engaged with a pin protruding from the fixed cover side so as to engage the upper seal plate. It is preferable that rotation of the seal plate is prevented, and the movable cover rotates while sliding on the seal surface of the upper seal plate.

According to the cutting agent scattering prevention cover of the present invention, when the revolving portion of the pallet changer rises, the seal plate closing the gap between the movable cover and the fixed cover separates from the movable cover. A gap having a predetermined size is formed between the end face of the movable cover and the seal plate. Due to this gap, the movable cover can rotate smoothly without interference of the seal plate in the rotation operation after the lift of the pallet changer.

After the rotating operation of the pallet changer, the gap between the movable cover and the fixed cover is closed by the overlap of the seal plate in conjunction with the lowering of the movable cover accompanying the lowering of the revolving portion. Will be kept.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a cover for preventing cutting agent scattering according to the present invention. FIG. 3 is an overall external view of a machine tool provided with a cutting agent scattering prevention cover. In this embodiment, a machine tool and a pallet changer are applied to the same components as those of the conventional example shown in FIG. 5, and the same components are denoted by the same reference numerals.

Reference numeral 20 denotes the entirety of the cutting agent scattering prevention cover according to the present embodiment.
The pallet changer has a frame-shaped fixed cover 21 having a size enough to completely surround the range in which the pallet P1 and tools (not shown) supplied to the machine tool processing section move. It comprises a movable cover 23 which closes an opening 22 formed on the front surface to prevent scattering of the cutting agent, rotates integrally with the pallet swivel 3 of the pallet changer, and moves up and down.

The front surface of the fixed cover 21 protrudes to the center of the pallet swivel 3 of the pallet changer, and the movable cover 23 separates the pallet P1 at the processing position from the pallet P2 at the standby position. . The opening 22 of the fixed cover 21 has a sufficient frontage so that the turning operation of the pallet changer can be smoothly performed, and an appropriate gap is provided between the upper side of the opening edge of the opening 22 and the side. The movable cover 23
Is fixed to the turning part 3 side so as to operate integrally with the pallet turning part 3.

FIG. 1 is a view showing a front surface of a fixed cover 21 to which a movable cover 23 is attached.
Is a rectangular cover consisting of the upper and lower frame, left and right frame,
A window 24 is provided so that the processing status of the machine tool can be seen from the outside. Upper end of movable cover 23 and fixed cover 2
An upper seal plate 25 is attached to the upper end surface of the movable cover 23 via a resin sealing material 26 in order to seal a gap between the movable cover 23 and the upper cover 1. In this case, the upper seal plate 25
Is connected to the movable cover 23 by a pin 27 penetrating the central portion, and can move up and down together with the movable cover 23 during a lift stroke of the pallet changer. Holes 28a and 28b are formed at both left and right ends of the movable cover 23, and the upper seal plate 2
5 rises, the fixed cover 2 is inserted into the holes 28a and 28b.
Rotation preventing pins 29a and 29b, which are implanted on one side and whose tips project downward, are inserted. Therefore, in this state, even if the pallet changer performs a rotation operation, the upper seal plate 25 is prevented from rotating together with the movable cover 23 because the rotation operation is prevented by the rotation prevention pins 29a and 29b.

Next, in order to seal a gap between the left and right ends of the movable cover 23 and the fixed cover 21, seal plates 30, 30 are provided on the left and right ends of the movable cover 23.
Is provided. FIG. 2 shows the structure of the seal plate 30 in detail.

In this embodiment, the seal plate 30 is suspended from the upper seal plate 25 by a hook 31, and in this case, the tip of the hook 31 is fitted into the groove 32 of the upper seal plate 25. Therefore, the up and down movement of the movable cover 23 and the movement of the seal plate 30 are interlocked, and the seal plate 30 moves up and down by the lift stroke of the pallet changer.

2 and 4 inside the seal plate 30.
As shown in FIG. 7, two upper and lower guide shafts 33, 33 fixed to the fixed cover 21 in an oblique posture are provided. Blocks 34, 34 slidably fitted on the guide shaft 33 are fixed to the seal plate 30. In this case, the guide shaft 33 is configured such that when the seal plate 30 is raised, the seal plate 30 is inclined in a direction away from the left and right end surfaces of the movable cover 23, whereby the seal plate 30 is retracted in a direction in which a gap is generated. It has become. Rubber seals 35 are attached to both left and right end surfaces of the movable cover 23. Conversely, when the seal plate 30 descends, the rubber seal 35 is pressed against the seal plate 30 and compressed. The hermeticity of the fixed cover 21 is maintained. Next, the operation of the embodiment configured as described above will be described.

First, when the pallet swivel section 3 of the pallet changer is raised, the seal plates 30 on the left and right sides of the movable cover 23 are guided by the guide shaft 33 and move away from the movable cover 23 in conjunction with this. , Movable cover 23
A gap having a predetermined dimension is formed between the left and right end surfaces of the seal plate 30 and the seal plate 30. Due to the presence of the gap, the movable cover 2 cannot rotate in the rotation operation after the lift of the pallet changer.
3 can rotate smoothly without interference of the seal plate 30. During this rotation operation, the movable cover 23
Is rotated while its upper end surface slides on the sealing surface of a sealing material 26 attached to the lower surface of the upper sealing plate 25.

Next, after the rotation of the pallet changer, the movable cover 23 descends as the pallet swivel 3 descends. The upper seal plate 25 is also lowered, and the seal plate 30 is also guided by the guide shaft 33 in conjunction with this movement, and moves so as to sandwich the movable cover 23 from the left and right sides. As a result, the gap is formed by the seal plate 30.
And the rubber seal 35 is in close contact with the sealing surface of the seal plate 30, so that the hermeticity is sufficiently maintained.

Since the processing of the workpiece is started after the hermetically sealed, the scattering of the cutting agent to the outside during that time is prevented.

[0022]

As is apparent from the above description, according to the present invention, when the pallet swivel section is raised during the operation of changing the pallet, a gap is generated between the fixed cover and the movable cover in conjunction therewith. As a result, the rotating movement of the movable cover is enabled by the subsequent pivoting operation, and then the sealing plate is sealed so as to seal the gap between the fixed cover and the movable cover during the lowering operation. Operates, so that the cutting agent scattered during the processing of the workpiece does not scatter outside the cover, and the environment of the factory can be kept clean.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a cutting agent scattering prevention cover according to the present invention.

FIG. 2 is a view showing in detail a seal plate provided in the cutting agent scattering prevention cover according to the embodiment.

FIG. 3 is an external configuration diagram of a machine tool including a pallet changer to which the cutting agent scattering prevention cover of the present invention is applied.

FIG. 4 is a diagram showing a cross section of a seal plate.

FIG. 5 is an external configuration diagram of a machine tool including a pallet changer to which a conventional cutting agent scattering prevention cover is applied.

[Explanation of symbols]

 2 Column 3 Pallet changer of pallet changer 20 Cutting agent scattering prevention cover 21 Fixed cover 22 Opening 23 Movable cover 24 Window 25 Upper seal plate 26 Seal material 27 Pin 29a, 29b Rotation prevention pin 30 Seal plate 31 Hook 33 Guide shaft 34 Block 35 rubber seal

Claims (3)

[Claims] 1. A machine tool provided with a pallet changer for exchanging a plurality of pallets at symmetrical positions with respect to a center of rotation by a vertical movement and a horizontal rotation movement of a pallet swivel part, and is located on a machine part side of the machine tool. A fixed cover formed so as to surround a pallet to be moved and a moving range of a tool, and an opening of the fixed cover provided to separate the pallet at the processing position from the pallet at the standby position, A cutting agent scattering prevention cover comprising a movable cover and a movable cover which operates integrally with the movable cover, wherein a seal plate for sealing a gap between the movable cover and an opening in the fixed cover is moved in conjunction with the movement of the movable cover. The seal plate causes a gap allowing rotation of the movable cover in the opening with the rise of the movable cover, A cutting agent scattering prevention cover wherein an overlapping margin is generated in a gap between the fixed cover and the movable cover as the movable cover is lowered. 2. The seal plate is hung on both left and right sides of the movable cover via hooks, and guides the seal plate in a direction to widen the gap when the movable cover rises. The cutting agent scattering prevention cover according to claim 1, wherein the cutting agent scattering prevention cover is slidably engaged with a guide member fixed to the fixed cover side while being inclined. 3. An upper seal plate is connected to an upper side edge of the movable cover, and the upper seal plate is engaged with a pin projecting from the fixed cover side when the movable cover is raised. The cutting agent scattering prevention cover according to claim 2, wherein the movable cover is rotated while sliding on the sealing surface of the upper seal plate.