JPH045230Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an improved full cover for preventing scattering of chips and cutting fluid or grinding fluid of a machine tool.

Prior Art To maintain the working environment, the entire surface of the machine is covered with a cover to prevent chips and cutting fluid or grinding fluid from scattering to the outside. For example, the front cover must be a movable cover that can open and close part of the front cover in order to allow the workpiece to be taken in and out. Since the cutting fluid or grinding fluid adhering to the inner surface of this movable cover drips to the outside of the machine when it is opened, conventionally, a scraper 101 made of oil-resistant rubber or soft resin is used to remove the movable cover from the fixed side cover 102, as shown in FIG. The movable cover 103 was opened while being attached to the end face and squeezing out water droplets.

Problems to be Solved by the Invention Since the scraper 101 attached to the end face of the fixed side cover 102 is attached to the entire edge of the movable cover in order to squeeze out water droplets from the entire inner surface of the movable cover, the sliding resistance when the cover is moved is large and the movable cover is The problem was that it required a large amount of force.

Means for Solving the Problems In a full-face cover 4 of a machine tool having a movable cover 7 for loading and unloading workpieces, an air outlet 8a provided at an end of the fixed cover 6 toward the inner surface of the movable cover 7; It comprises an air supply device having a cam 9 fixed to the movable cover, and a mechanical valve 10 that automatically adjusts the flow rate of the air blow in conjunction with the opening of the movable cover 7 by the cam 9.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In a known lathe, a headstock 1 is fixed on the left side of the bed, and a main spindle 2 is provided on the headstock 1 so as to be rotatable by a plurality of bearings. The entire surface is covered by a cover 4. The fixed cover 5 on the right side of the full cover 4 has a front plate 3 whose front surface is fixed to the front end surface of the bed.
and the right side is fixed to the fixed part of the lathe. Furthermore, the left fixed cover 6 is fixed to the right end surface of the headstock 1, and the right and left fixed covers 5 and 6 are integrally formed by a rear fixed cover (not shown), so that the workpieces on the front and upper surfaces of the center of the lathe are fixed. It covers almost the entire surface except for the entrance/exit opening. A movable cover 7 having an L-shaped cross section covering the upper surface and the front surface is provided movably in the direction of the spindle axis on a guide rail (not shown) provided on the upper part of the fixed cover on the rear side and on the upper surface of the front plate 3. It is moved to a closed position on the right side when the workpiece is attached and to an open position on the left side when the workpiece is attached or detached or when changing setups. The movable cover 7 has an opening side end surface 7.
A gutter 7b is provided on the inner circumference of the movable cover 7, and the right side surface of the gutter 7b comes into contact with the inside of the groove 6a having a U-shaped cross section provided on the outer periphery of the right end surface of the fixed cover 6 at the closed position of the movable cover 7 to form a seal. A rectangular air flow tube 8 having an air outlet 8a on the right side surface 6b of the groove 6a is attached to the inner surface of the movable cover 7 with a slight gap δ. And air outlet 8a
blows out air diagonally inward to the inner surface of the movable cover 7 to blow off water droplets adhering to the inner surface of the movable cover 7. Further, a plate cam 9 is fixed to the lower side of the movable cover 7, and the contact 10a, which is urged to protrude by the spring of the mechanical valve 10 fixed to the front plate 3, comes into contact with the cam surface of the plate cam 9 and moves. The throttle of the mechanical valve 10 is operated by opening and closing the cover 7.

Pressure air is supplied to the mechanical valve 10 from an air source 11 via an electromagnetic valve 12, and the air automatically adjusted by the mechanical valve 10 is further adjusted to an appropriate flow rate by a throttle 13 and then flows into the air flow pipe 8. The air is supplied and blown out from the air outlet 8a toward the inner surface of the movable cover 7.

Operation A workpiece is currently being gripped by the main spindle 2 of the lathe via a chuck, and being turned while being sprayed with cutting fluid.
The cutting fluid is blown off by the rotating workpiece and the chuck, scatters, collides with the surroundings, becomes a droplet, and fills the entire cover 4, causing a slight drop between the air outlet 8a and the movable cover 7, where air blowing has stopped. A part of the cutting water flows out from the gap δ, but this splashed cutting water accumulates in the gutter 7b and is collected in the cutting fluid tank along the flow gradient. When the cutting operation is finished, the discharge of the cutting fluid is stopped, the rotation of the main shaft 2 is stopped, and the movable cover 7 is slightly opened, the plate cam 9 moves together, and the contact 10a of the mechanical valve 10 moves forward along the cam surface. When the throttle opens, the pressurized air supplied from the air source 11 through the opened electromagnetic valve 12 passes through the mechanical valve 10, passes through the throttle valve 13, and is vigorously blown out from the air outlet 8a of the air flow pipe 8. ,
Blow away water droplets adhering to the inner surface of the movable cover 7. As the moving cover 7 is further opened, the contact 1
0a retreats and the throttle gradually closes air outlet 8
This reduces the amount of blowout from a and prevents the cutting fluid from scattering into the atmosphere from the cover opening. When the movable cover 7 is fully opened to the left end, the contact 10a is moved to the retreat end by the plate cam 9, and the mechanical valve 10 is completely closed, cutting off the pressurized air and stopping the outflow from the air outlet 8a. do.

When the movable cover 7 is closed after the attachment and detachment of the workpiece is completed, the orifice of the mechanical valve 10 is automatically adjusted in the reverse order described above, and when the movable cover 7 is moved to the right side closing position, the air from the air outlet 8a is Air outflow is stopped.

In addition, when air blowing is not required due to opening/closing for mechanical adjustment, the supply of pressurized air can be stopped by closing the electromagnetic valve 12, and the air blowing when the movable cover 7 is opened/closed can be stopped.

Effects As detailed above, the present invention provides an air blow outlet on the inner side of the outer periphery of the fixed cover that comes into contact when the movable cover for loading and unloading the workpiece is closed, with a slight gap between the movable cover and the inner surface of the movable cover. The movable cover removes water droplets that adhere to the inner surface of the cover when it is moved, and automatically adjusts the amount of air blowing using a cam fixed to the movable cover to prevent water droplets from scattering into the atmosphere during movement. This has the effect of preventing scattering and dripping of the cutting fluid or grinding fluid outside the machine, and also has the effect of providing a movable cover that moves lightly with little sliding resistance.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the present invention, FIG. 2 is an enlarged view of the air outlet section of FIG. 1, and FIG. 3 is an explanatory diagram of the prior art, showing an enlarged scraper section. 4...Full cover, 6...Fixed cover, 7...
Movable cover, 8a...Air outlet, 9...Cam, 10...Mechanical valve.

Claims (1)

[Scope of utility model registration request] A full-face cover for a machine tool having a movable cover for loading and unloading workpieces, comprising an air outlet facing the inner surface of the movable cover and provided at an end of the fixed cover, a cam fixed to the movable cover, and the cam. The air supply device includes an air supply device having a mechanical valve that automatically adjusts the flow rate of the air blow in conjunction with the opening of the movable cover, and the air blow stops when the movable cover is closed, is strong at the beginning of opening, becomes weaker as it opens, and is fully opened. An air blowing device for removing deposits from the inner surface of a moving cover, which is characterized by stopping at certain times.