JPS62161492A - Treating device for waste gas of machine tool utilizing heat energy - Google Patents

Abstract

PURPOSE:To decrease a floor area and to avert the intricate design in a machine tool in which pies holding heat cross each other by constructing part of a body frame as a cooling installation and shortening the distance from a working part where the heat energy concentrates. CONSTITUTION:Closed spaces 50 for housing water storage carriages 52 as the cooling installation are formed in right and left box frame parts 15 of a base frame 17. A hot exhaust gas which contains the melt generated in the working part of a laser, etc., is sucked through coiled pipes 48 connecting and opening into the spaces 50 and is discharged into the carriages 52. The molten particles, etc. contained therein settle into the stored water by colliding against the water surface in the carriages 52. The gaseous components are filled into the spaces 50 and are gradually cooled by the collision against the water surface in the carriages 52, etc.; thereafter, the gas is sucked by a suction dust precipitator connected to the closed spaces 50.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a treatment device for thermal exhaust gas in a machine tool that utilizes thermal energy, such as a laser processing machine or a plasma processing machine.

[Conventional technology]

In machine tools that utilize thermal energy, a large amount of heat exhaust gas is inevitably generated from the machining section, so it is necessary to install a dust collector or the like to suck it up and treat it.

However, if the thermal energy machining section and the dust collector are directly connected with a pipe, the connecting pipe, the dust collector, or the machine tool itself may be damaged by the high heat of the hot exhaust gas and by high-temperature molten particles contained in the hot exhaust gas. That will happen.

Therefore, it is conceivable to interpose cooling equipment in the connection path between the processing section and the dust collector, but installing this cooling equipment next to the machine a tool is not a good idea. This will actually increase the installation area, and since the connection path (pipes, etc.) to the external cooling equipment will still be exposed to high temperatures, it will be easily damaged, and the pipes will be exposed to hot exhaust gas. Although it is possible to install special heat-resistant pipes that will not cause major damage such as ruptures even if the pipes are damaged, causing accidents such as hot exhaust gas leaking into the outside air, the heat-resistant pipes are Since it is expensive, using a long heat-resistant pipe has the drawback of increasing the cost of the entire machine tool. Also,
It is undesirable from a safety point of view to provide a pipe inside the machine tool that extends to the outside of the machine and crosses the pipe that generates heat.

[Problem that the invention seeks to solve]

This invention applies to machine tools that utilize thermal energy.
This is an attempt to eliminate the above-mentioned inconveniences.

[Means for solving problems]

In order to solve the above-mentioned disadvantages, this invention makes a part of the main body frame of a machine tool into a closed space, stores a water storage cart in the closed space, and connects the closed space with a thermal energy machining part on the one hand. On the other hand, it is connected to a suction dust collector so that the inside of the closed space is made to have a negative pressure by suction by the suction dust collector, thereby indirectly introducing the hot exhaust gas into the water storage truck in the closed space. This is something to consider.

〔Example〕

Hereinafter, embodiments of a laser processing machine will be described based on the drawings.

The laser processing machine of this embodiment has a laser processing head (LI
It is a so-called multi-tasking machine equipped with a punch processing head (Pa+) in addition to , a side C-shaped frame (1) supporting the laser processing head (L 11 ) and the punching nozzle (Pl+>)
and a work holder (2) with a sheet metal (W) supported on its upper surface.
It consists of a plate material mounting table (3) that moves the sheet metal (W) in a predetermined programmed direction by holding the edges thereof, and has an upper and lower structure similar to that of a known turret punch press machine. Puncher tool (4) Gui tool (
5) and a ram (6).
+) (Fig. 4) and the laser processing head (Lll) are provided at positions that overlap front and back when viewed from the front. (7
) (g) are upper and lower turrets loaded with a large number of upper and lower tools (4) and (5), and (9) is a laser oscillator.

Each device part will be explained in detail below.

In other words, the plate material mounting table (3) is the movable table (1
1) It consists of (12), a vertically moving table (13), and a plate moving device (14), and in front of the C-shaped frame (1) are left and right box frame parts (15) with a pentagonal cross section. It consists of a connecting frame part (16) that connects the left and right box frame parts (15),
Board material II! ff Chiful (3) Entire base frame (
17) is installed on the floor, and the base frame (17)
The movable table (1) is movable along a pair of left and right rails (18) extending in the Y-axis direction (Fig.
1) (12) is the support force.

A closed space is formed within the base frame (17) for storing a water storage cart as a cooling facility, which will be described in detail later.

(13) is a blind-shaped lift 1i whose upper surface is at the same height as the moving table (11) (12) in the raised position.
↑It is a vertically movable table, and the vertical table (13
) are provided with movable tables (11) and (12) on the left and right sides, and this pair of left and right movable tables <11>('
12> is integrally connected to the carriage (19) of the work holder (2) constituting the plate moving device (14),
A ball knight (21) provided on the lower surface of the moving table and carriage (19) is connected to the base frame (17).
) is screwed onto a ball screw (22) provided along the Y-axis direction, and is moved in the Y-axis direction by rotation of the ball screw (22) (FIG. 4). Also, this Y
Each moving table (11) (12) with axial movement
A rail (23) having an open end (23a) for supporting the vertically movable table (13) fixed to the lower surface of the inner side of the table moves, and one end is connected to the C-shaped frame (1) and the other end is free. The vertically movable table (13)
) can be moved up and down by changing its downward bending point, as shown by solid lines and chain lines in FIG.

The work holder (2) is screwed onto a pole screw 24) installed in the carriage (19) and extends in the X-axis direction, and rotates on the carriage (19) in the X-axis direction ( Figure 2) The plate material (W) moved to an arbitrary position and held by the work holder (2) is moved by the X-axis movement by the work holder (2) and the carriage (19
) and moving table (11) (12) Y by the whole
The movement of the axis is combined with the movement of the axis so that it can be moved to an arbitrary position within the horizontal plane.

Next, the vertically movable table (13) will be explained in detail.
is composed of a large number of elongated plates (27) whose left and right ends are fixed on each link (26) of a single chain (25) (Fig. 2.4), and the left and right chains (25) are connected to the Moving table (11) (12) Bottom rail (23)
) is supported by a number of elongated plates (27)
The upper surface constitutes one plane that supports the plate material (W), and the free hanging part (one free end) where the left and right chains (25) are not supported by the rail (23) does not constitute a plate material supporting plane, and the carriage (19) , moving table (11)
As the table (12) moves in the Y-axis direction, it sinks downward as shown by line tt4 in FIG. There is no window space (2 days) at the proximal end of the Lll) side that can be opened and closed as follows.

That is, as shown in the fourth figure, the C-shaped frame (1
) via the bracket (29) to the lower side of the cylinder (
31) is pivotably supported (32), and the end of the chain (25) of the vertically movable table (13) is connected to the end of the rod C31a of the cylinder (31). ), the base end of the vertically movable table (13) moves as close as possible to the lower turret (8), and the lower turret (8) moves away from the lower turret (8).
and the position shown in the fourth figure, in which a constant window space (28) is formed.

In other words, the cylinder (31) contracts and the vertically movable table (13) is drawn toward the lower turret (8) on the rail (23), the window space disappears, and the vertically movable table (13) is held on the upper surface. Taleft (7) (8) The state that constitutes the front plate support plane is during punching operation, and the cylinder (31) is extended and the vertically movable table (
The laser processing head (3) is moved on the rail (23) in a direction away from the taleft (7) (8), and the laser processing head (
The state shown in Figure 4, where the window space (28) is directly below the L I+ ), is the state during laser processing operation. A pedestal bag for the laser processing head (LH)?
ef(33) is provided.

That is, as shown in FIG. 4 as a side view and as shown in FIG. 5 as an enlarged front view, the pedestal ga (33
) is connected to the guide rail (34) provided on the lower front surface of the C-shaped frame (1) via a slide guide (35),
The lifting frame (36) is attached to be able to rise and fall freely, and the lifting frame (
The lift frame (36) has the slide guide (35) attached to the back side, and the rod (37a) end of the drive cylinder (37) is attached to the front side. It consists of a vertical plate (38) part at both ends of the vertical plate (3β) and a horizontal plate (39) part that extends horizontally from the top of the vertical plate (3β) part, but the horizontal Fi (39) part is The movable plate (43) consists of a fixed plate (41) portion at both left and right ends fixed to a vertical plate (38), and a movable plate (43) portion provided to be swingable via a hinge (42). Depending on the extension of the cylinder (44) disposed between the vertical plate (38), the cylinder (44) becomes horizontal as shown by the solid line and the dashed-dotted line in Figure 4, and its upper surface is used during laser processing. It constitutes the bearing surface of the plate material (W),
When the cylinder (44) contracts, it becomes inclined as shown by the two-dot chain line in FIG. 4, and its upper surface forms a cutout discharge chute surface.

(45) is a shaft connecting left and right pinions (47) that mesh with racks (46) fixed to the back surfaces of the left and right vertical plates (38), and the shaft (45), rank (46), pinion (47) The left and right vertical plates (3
8) is synchronized so that the entire lifting frame (36) moves up and down while keeping it horizontal.

An opening (49) connected to a large diameter bellows pipe (48) is formed in the center of the movable plate (43), and through the pipe (48), a suction dust collector, which will be described later, removes slag generated during laser processing. It is designed to remove products such as dust and gas by suction.

Further, (51) is a water mist ejector installed in a horizontal direction directly below the opening (49), and the water ejected from the water mist ejector (51) flows through a circulation path described below. Later, the Wi ring came to be used.

That is, the bellows pipe (48) is attached to the box frame portion (16) of the base frame (17) as shown in Figure 1.6.7.
A communication opening is opened to a closed space (50) inside the closed space (50).
The hot exhaust gas containing water and molten matter discharged from the bellows pipe (48) under negative pressure after being suctioned by the dust collector described below in 50) is transported to a hand-held water storage trolley housed in a closed space. (52) The water is spouted inward, and the overflow port (5
A receiving gutter (54) installed on the wall of the base frame (17) that receives overflow water from 3) is connected (56) to a water pump (55) outside the machine. ) is cyclically connected to a water mist ejector (51) as shown in the first diagram.

Note that (50a) is a partition plate that forms a closed space, and (50a) is a partition plate that forms a closed space.
8) is an opening (5) made in the wall of the box frame (15) of the closed space.
The trolley (52) is moved over the open/close door (58) in the open state shown by the chain line in FIG.
50) It is designed to be able to be put in and taken out. (61)
(58a) is a urethane stopper, (58a) is a locking device for the opening/closing door, (52a) is a receiving part formed by projecting the side wall of the water storage cart (52) outward, and the bellows pipe (48) is placed on the receiving part (52a). ) is open.

Another pipe (62) is connected to the side surface of the closed space (50), and a known suction dust collector is installed at the back of the C-shaped frame (1) through the pipe (62). (63) (Fig. 1) is connected to the closed space (50), and the air in the closed space is sucked through the pipe (62), which in turn causes the opening (49) of the pedestal device (33) to
) is designed to suck in hot exhaust gas.

(64) is a dust collector (the details of which are shown in Figure 8).
A water tank provided at the entrance to the pipe (63).
2) is connected to the upper part of this water tank (64), and is connected (65) to the dust collection a (63) through the air layer above the water tank, but there is a A gas suction pipe (66) passes through a water tank (67) and a strainer (68) in the water tank (64) to collect the gas.
It is connected (65) to (63).

Next, the laser processing head (L I+) will be explained in detail. As shown in FIG. Laser light guide cylinder (7
1) Drive the guide tube (72) up and down (72) and move the lower end of the guide tube to a position close to the plate material (W) surface on the table (3) (Fig. 4 - Black rust vA). The lifting drive device (7
3), and a following movement device (74) for moving the lower end of the guide cylinder onto the plate surface.
).

The elevating drive device (73) is attached to a movable plate (76) that can be slid up and down, which is fixed to the intermediate guide tube (72) via a bracket (75), and the main body side is fixed to the C-shaped frame (1) (78). ) are connected to each other (79), and when the cylinder (77) expands, the state shown by the dashed line in FIG. 4 changes, and when it contracts, the state shown by the broken line changes. (81) is a rail of the moving plate.

The following movement device (74) to the plate material surface has the above-mentioned guide cylinder (
The height of the guide cylinder (72) is finely adjusted by a built-in motor (82) interposed in the middle of the guide cylinder (72).
As shown in the 1st O diagram, the trace ring (86) is elastically suspended from the flange (84a) at the lower end of the guide cylinder (72) via a spring (85), and the surface height of the plate material is slightly different. Even if the built-in motor (82) and the spring-biased trace ring (86
), the lower end of the processing head (Ll+) is always in contact with the plate surface with constant pressure, and the focus of the laser beam is set at an appropriate position within the thickness of the plate (W>).

A skirt-like cover plate (84b) is hung from the periphery of the flange portion (84a) to form a cylindrical hood (84a).
4), and a suction pipe (87), which will be described later, is connected to the hood (84) so that gas generated from the laser processing position can be sucked.

Further, the upper surface of the trace ring (86) is not curved as shown in FIG.
b) The lower end is slightly bent inward, and after the gas generated from the sheet metal surface due to laser machining collides with the sheet metal surface together with the downwardly injected assist gas as shown in Figure 10,
It squirts outward and upward and is efficiently sucked and collected into the hood (84).

(88) is a spherical portion formed on the lower surface of the trace ring (86).

Then, the suction pipe (87) connects the dust collection a (63
), and the communication route will be explained next.

That is, as shown in FIG. 9, the suction pipe (87) connected to the hood (84) is fixed (91) to the vertically movable plate (76) via the bellows pipe (89), and the upper end thereof has a C-shape. It is inserted telescopically into a pipe (66) fixed to the shaped frame (1), and the pipe (G6)
is introduced into the water tank (64) along the upper part of the C-shaped frame (1) as shown in the first diagram, and then the water layer (67) is collected through the strainer (68) as described above.
(63) is being contacted.

In this embodiment, air flow amplifiers (92) having a structure as shown in FIG. 11 are installed at two locations on the pipe (66).
) (93) (In this example, the air thruster AM750t sold by Nippon Techno Controls Co., Ltd. is used.) Supplementing the amount of air sucked by the intervening device L/, dust collector A (63), the suction from the hood (84) This increases the amount of air by several tens of times and allows the gas generated from the laser processing position to be recovered with higher efficiency.

Next, the operation of the laser processing machine of the above embodiment and the treatment of exhaust gas accompanying the operation will be explained.

That is, during punching, the pedestal device (33) is set to the lowered position, the cylinder (31) is contracted, the vertically movable table (13) is drawn near the lower turret (8), and the vertically movable table (13) is ) and the left and right moving tables (11) and (12) constitute a support plane for the plate (W) (Fig. 2), and the plate (W) is held on the support surface by the work holder (2). is punched while moving in the X and Y axis directions according to a predetermined program.

When moving to laser processing, the first thing to do is to use the cylinder (
31) and move the vertically movable table (13) away from the lower turret (8) to form a window space (28) in front of the lower turret (8) (Fig. 4). , then raise the pedestal device (33) (solid line - one-dot chain line in Figure 4) and touch the upper surface of the pedestal bag 'Tt (33), that is, the horizontal plate (3).
9) form a plate support surface that is continuous with the vertically movable table (13) that has been moved.

At the same time, the laser machining head (L) lowered by extending the cylinder (77) is attached to the plate material (W) which is held by the work holder (2) and moves on the plate material support surface in the same way as during punching. Cutting is performed, and when the cutting is completed, the cylinder (44) is contracted and the movable plate (4
3) The section is tilted, the cutout is slid down the tilted chute-shaped movable plate (43), and carried out into a collection box outside the machine by a discharge conveyor (not shown) disposed directly below.

The hot exhaust gas containing the molten material generated in the processing area during this laser processing is sucked from the opening (49) on the top surface of the pedestal device (33) through the bellows pipe (48) as described above, and is sucked into the carriage. (52)' is discharged into the opening (4
9) is filled with water mist ejected by the water mist ejector (51), so the lower surface of the plate (-) facing the opening (49) (that is, the lower surface of the cut part) is cooled. As a result, the corners around the cut portion, which are partially melted by laser processing, do not fall off, resulting in a sharp cut surface.

Further, since the molten material jetting downward from the laser processing position is cooled by the water mist, there is no risk of damage due to heat even if the bellows pipe (48) has relatively low heat resistance.

The hot exhaust gas sucked and discharged onto the water storage truck (52) once collides with the water surface inside the truck (52), the contained molten particles etc. settle into the stored water, and the gas components are released into the closed space (50). After being filled with dust, it passes through the pipe (62), passes through the water tank (64), and is collected into the dust collector @ (63), but the truck (5)
2) a frame wall, partition plate (50a) forming the closed space (50) by colliding with the water surface within;
After being gradually cooled by contact with outside air through
It is sucked into the dust collector (63).

The amount of water in the water storage truck (52) is increased by the water mist and overflows, and the overflow water is collected by the water pump (55) and is again supplied to the water mist jetter (51) by the pump (55). This is as stated above.

Further, the gas generated on the upper surface of the plate material (W) is sucked into the hood (84) at the lower end of the laser processing head (LH) through which it passes, and goes into the water tank (64) through the pipes (87) and (66). After being purified by passing through the water tank (64), it is sucked and collected into the dust collector (63), but due to the shape of the hood (84) and the trace ring (
86) Since the upper surface shape does not have the characteristic shape described above, the suction and recovery efficiency of generated gas is high. Also, the pipe (
The amount of air sucked from the hood (84) is also increased by the air flow amplifiers (92) and (93) interposed in the suction path by the hood (84), and the recovery rate of generated gas is increased.

In addition, in the above embodiment, the structure is such that a closed space (50) is provided in the box frame portions (15) on the left and right sides of the base frame (17).
Of course, it may be provided elsewhere in the main body frame closer to the processing area, such as the lower part of the C-shaped frame (1).

〔Effect of the invention〕

As is clear from the above explanation, in the machine tool equipped with the exhaust gas treatment device according to the present invention, a part of the main body frame itself serves as the cooling equipment, so it is difficult to install a separate cooling equipment outside the machine. In comparison, the actual installation area is smaller, and the distance to the machining area where thermal energy is concentrated is also significantly shortened, so the section that requires special heat-resistant pipes is shortened, making it easier to use. It is possible to reduce costs and avoid a complicated design in which the interior of the machine tool has intersecting heat-generating pipes.

[Brief explanation of drawings]

Figure 1 is a schematic perspective view of a laser processing machine equipped with an exhaust gas treatment device according to the present invention, Figures 2-3 are an overall plan view and side view of the laser processing machine itself (surrounding piping, etc. are omitted);
FIG. 4 is a view taken along the line IV-IV in FIG. 2, FIG. 5 is a front view of the pedestal device (view taken along the line V-V in FIG. 4), and FIG. 7 is a cross-sectional view taken along the vr line, FIG. 7 is a view taken along the ■-■ line in FIG. 6, FIG. 8 is a partially cutaway rear view of the water tank at the rear end of the C-shaped frame, and FIG. 9 is a front view of the laser processing head. , FIG. 10 is a longitudinal sectional front view of the lower end of the laser processing head, and FIG. 11 is a schematic structural diagram of the air flow amplifier. (15)...Box frame part (16) -...Connection frame part (17)...Base frame (48)...Bow bellows pipe (49)...Opening (50
)...Closed space (50a)...Partition plate (52)
...Water storage trolley (62) ...Pipe (63) -
・・Dust collector (L I+) ・・Laser processing head (W) ・・Plate material 2 figures + 311B O 9 figures large 10 figures 68 figures large 11 times

Claims (1)

[Claims] A part of the main body frame of the machine tool is made into a closed space, a water storage cart is housed in the closed space, and the closed space is connected to a thermal energy processing part on one side and a suction dust collector on the other side. This is an exhaust gas treatment device for machine tools that uses thermal energy.