JPH03146214A - Lubricating device for fixed dummy block end face of extruding press - Google Patents

Abstract

PURPOSE:To improve the operational efficiency and to execute labor saving by controlling the movement of a piston in a sliding cylinder with a stick slip preventing device composed of a speed controller, a pressure controller and an electromagnetic switching valve. CONSTITUTION:A linear motion part in the axial direction of a holding member 18 is provided on the side of a tie bar 1 through an arm 11. A linear motion bearing box 22 is provided fixedly at the tip part of a piston rod engaged with a sliding cylinder of a linear motion part. The bearing box 22 is arranged so that it can be moved back and forth on the guide rod. The movement of the piston in the sliding cylinder is controlled by the stick slip preventing device 40 composed of the speed controller 3, the pressure controller 33 and the electro magnetic switching valve 32. Consequently, seizure of a fixed dummy block can be prevented completely and a solid lubricant can be changed easily.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a lubricating device that applies a solid lubricant to prevent seizing on the end face of a fixed dummy block that is in contact with a high-temperature billet extruded by an extrusion press or the like. It is something.

[Prior Art] Conventionally, as a seizing prevention device for the end surface of a fixed dummy block of an extrusion press, there is a device disclosed in Japanese Patent Application Laid-Open No. 1-11311.
There is a fixed dummy block end face lubrication device as shown in No. 2. A conventional example will be explained using FIG.

The device 9 is composed of a lubricant application section 41 and a base section 42 fixedly attached via the arm 11, and the base section 42 further includes a swing section 43 and a linear motion section 44.

The swing 43 is made up of a swing cylinder 12, a rack 13, and a pinion 14, and when the swing cylinder 12 is operated, the swing cylinder 12 is
The rack 13, which is engaged with the
The lubricant applicator 41 is configured to swing in the radial direction of the dummy block 5 via the arm 11 after the lubricant applicator 41 is transmitted to the rod 15b of the linear motion unit 44 fixed to the rod 15b.

On the other hand, the linear motion section 44 is disposed so that the axis of the linear motion section 44 and the axis of the swing section 43 intersect at a substantially right angle, and is engaged with the sliding cylinder 15 so as to be movable back and forth with the rod 15b. is provided, and an arm 11 is fixedly provided substantially perpendicular to the tip of the rod 15b. This rod 1
The amount of movement of 5b back and forth is adjusted by limit switch 21. In addition, a push plate 15a is fixed in the middle of the rod 15b,
With the operation of the sliding cylinder 15, the swing part 43 can be pressed and moved by the push plate 15a. Further, the rod tsb is connected to the swing portion 4 described above.
3, the lubricant application section 41 can be moved away from or approached the lubricant application surface of the fixed dummy block 5 by the operation of the sliding cylinder 15. It is configured so that it can be done.

Furthermore, the lubricant application section 41 includes a solid lubricant 10° spring 16. Motor 17. Holding member 18. It consists of a plate 19 and a head portion 41a.

In the lubricant application section 41, the columnar solid lubricant 10 is inserted into a plurality of cylindrical holding members 18, and the holding members 18 are attached to the plate 19 with bolts. A play plate 19 is attached to the head portion 41a via a spring 16, and softens the contact between the lubricant 10 and the fixed dummy block 5.

Further, a motor 17 is attached to the lubricant application section 41, and by rotating the plate 19 by the motor 17, the columnar solid lubricant 10 is applied to the end face of the fixed dummy block. There is.

[Problem 8 to be solved by the invention] However, when lubricating oil is applied using such a conventional lubricating device, it is not always satisfactory. In other words, when an attempt is made to bring the head of the fixed dummy block end face lubrication device closer to the fixed fist dummy block by introducing working fluid into the sliding cylinder, stick-slip occurs, that is, the air as the working fluid in the sliding cylinder runs out. , the piston is compressed to a pressure that generates a force equal to the static friction force generated between the outer circumference of the piston and the inner wall of the cylinder, and then the piston rapidly moves at a higher speed than expected while generating a force equal to the static friction force. start on. As a result, the head of the fixed dummy block end face lubrication device collides with the fixed dummy block, and the forward movement of the lubricant application part is not performed smoothly, resulting in uniform lubrication on the surface of the fixed dummy block. It was not possible to apply oil.

[Means for Solving the Problems] In the present invention, in order to solve such problems, when applying a solid lubricant for preventing seizure to the end surface of a fixed dummy block of an extrusion press, A holding member for holding the solid lubricant is rotatably provided, and the holding member is provided so as to be movable back and forth in the axial direction so as to be pressed against the end face of the fixed fist dummy block, and further,
A fixed dummy block end face lubrication device for an extrusion press in which the holding member is movable between a position facing the end face of the fixed dummy block and an external position not facing the end face, wherein the holding member is moved in an axial direction. A linear motion section, which is a motion drive source, is provided on the tie bar side via a holding member and an arm disposed in a direction intersecting the linear motion section, and a piston rod tip end engages with a sliding cylinder of the linear motion section. A linear motion bearing box is fixed to the linear motion bearing box, and the linear motion bearing box is
It is installed so that it can move forward and backward through a guide rod whose both ends are rotatably supported.

On the other hand, a stick-slip prevention device including a speed controller, a pressure controller, and an electromagnetic switching valve for controlling the movement of the piston in the sliding cylinder is provided.

[Operation] When the stem is at the backward limit, first, the swing cylinder is operated to swing the lubricant application part through the arm and move it onto the core line of the fixed dummy block.

Next, by operating the sliding cylinder, the lubricant applicator is moved closer to the fixed dummy block, and at the same time, the motor is rotated to press the solid lubricant onto the surface of the dummy block, making it possible to apply it evenly and evenly. .

[Example] Figures 1 to 3 show examples of the extrusion press according to the present invention, and Figure 1 shows the entire structure when a fixed dummy block end face lubrication device and a stick-slip prevention device are attached to the extrusion press. Figure 2 is a cross-sectional view of the work in Figure 1,
FIG. 3 shows a perspective view of the fixed dummy block end face lubrication device of the extrusion press of FIG. 1.

In the extrusion press shown in FIG. 1, reference numeral 1 indicates a tie bar;
2 is an end platen, 20 is a ram cylinder, and
It consists of the main parts of the dice 8.

This device transfers the billet 7 in the container 6 to the ram cylinder 2.
It has a structure in which it is extruded by a fixed dummy block 5 attached to the tip of the stem 4 of 0.

A fixed dummy block end face lubricating device 9 is attached to a tie bar 1 of an extrusion press.

The fixed dummy block end face lubricating device 9 includes a lubricant application section 41. Linear motion part 42. It is composed of a swing section 43 and a stick-slip prevention device 40.

The lubricant application section 41 includes a solid lubricant 10. spring 16
．． Motor 17. Holding member 18. The linear motion section 42 further includes a sliding cylinder 15, a linear motion bearing box 22. Guide rod 23
and a guide rod support plate 24.

The swing section 43 includes a swing cylinder 12, a rack 13, and a binion 14, and the stick-slip prevention device 40 includes a muffler 30, a check valve 31.
Solenoid switching valve 32. Each of them is composed of a pressure controller 33 and a speed controller 36.

Further, the pressure controller 33 includes a pressure reducing valve 33a, a pressure gauge 33b, and a check valve 34c, and the speed controller 36 includes flow control valves 36a, 36c, and check valves 36b, 36d.

First, the configuration of the lubricant application section 41 will be described in detail.

The columnar solid lubricant 10 is inserted into a plurality of cylindrical holding members 18, and the holding members 18 are attached to a plate 19 by bolting. The plate 19 is attached to the head portion 41a via a spring 16, and softens the contact between the lubricant lO and the fixed dummy block 5.

Further, a motor 17 is attached to the head portion 41a, and by rotating the plate 19 by the motor 17, the columnar solid lubricant 10 is evenly applied to the end face of the fixed dummy block 5. It has become.

Further, the linear motion part 42 of the single lubricating device 9 is fixed to the linear motion bearing box 22 via the arm 11 and the lubricant application part 41 . The swing part 43 and the linear motion part 42 are not directly connected, and the pinion 14 is connected to a guide rod support plate 24a provided on the sliding cylinder 15 side among the guide rod support plates 24 provided at both ends of the guide rod 23.
are rotatably provided with rods 15b inserted coaxially on both sides of the fixed support plate 25, and the rods 15b engaged with the sliding cylinder 15 are connected to the pinions 14. Fixed support plate 25 and guide rod support plate 2
4a in a double-tube manner, the linear motion bearing box 22 is fixed to the side end surface of the linear motion bearing box 22, and by introducing operating air into the sliding cylinder 15, the linear motion bearing box 22 is inserted onto the guide rod 23. can be moved back and forth in the axial direction.

The back and forth movement of the linear motion bearing box 22 on the guide rod 23 is regulated by a cylinder with a switch provided in the sliding cylinder 15. That is, a magnetic material is circumferentially fixed adjacent to the outer periphery of a piston (not shown) in the sliding cylinder 15, and a sensor (not shown) is provided on the outer periphery of the sliding cylinder 15, so that the piston is not shown in the sliding cylinder 15. By detecting the position of the piston as it moves back and forth in the axial direction, the movement of the head is eventually regulated.

On the other hand, the pinion 14 meshes with the rack 13, and the end surface of the rack 13 is fixed to the swing cylinder 12. Therefore, by introducing operating air into the swing cylinder 12, the rack 13 is moved to the linear motion section 42. guide rod 2
3, and the pinion 14 meshed with the rack 13 rotates, thereby finally swinging the lubricant application part 41 left and right.

Now, when operating air is introduced to the piston head side of the sliding cylinder 15, the lubricant application part 41 is separated from the fixed dummy block 5, and conversely, when operating air is introduced to the piston rod side, the lubricant application part 41 is moved away from the fixed dummy block 5. will approach fixed dummy block 5. In this way, when the piston inside the sliding cylinder 15 moves back and forth in the axial direction inside the sliding cylinder 15 by the actuation air, stick-slip is likely to occur.Therefore, in the present invention, stick-slip prevention is used to prevent stick-slip. A device 40 was provided for the purpose.

The stick-slip prevention device 40 prevents these stick-slips so that the columnar solid lubricant lO attached to the head of the fixed fist dummy block end face lubricating device 9 is constantly and slowly applied to the surface of the fixed dummy block 5. This allows for uniform application of lubricating oil.

That is, when the fixed dummy block device 9 approaches the fixed Φ dummy block 5 by introducing operating air, first the electromagnetic switching valve 32 is energized to excite it and push it upward from the current position in FIG. Raise it to form an operating air introduction passage.

The operating air is provided by the check valve 31. The pressure is reduced to an appropriate pressure from the electromagnetic switching valve 32 through the pressure reducing valve 33a, and the flow rate is adjusted to an appropriate flow rate by the flow rate regulating valve 36a and introduced to the piston rod side, and the energy of this actuating air is transferred to the sliding cylinder. It is used for the movement of 15 pistons.

On the other hand, when it is desired to separate the fixed dummy block device 9 from the fixed dummy block 5 by introducing operating air into the piston head side of the sliding cylinder 15, the electromagnetic switching valve 32 is energized and energized. is pushed down from its current position to form an operating air introduction passage. In this way, the operating air is supplied to the check valve 31 as described above. The pressure is reduced from the electromagnetic switching valve 32 to an appropriate pressure through the pressure reducing valve 33a, the flow rate is adjusted to an appropriate flow rate by the flow rate regulating valve 36c, and then introduced into the piston head side.

Contrary to the past, when discharging operating air, the solenoid switching valve 3
For example, when discharging operating air from the piston head side, the check valve 36 is
d and 34c to the electromagnetic switching valve 32, and finally passes through the muffler 30 and is discharged to the outside.

The operation of the fixed dummy block end face lubricating device 9 configured as described above will be explained.

Before extruding the billet 7 with the fixed dummy block 5, that is, when the dummy block 5 is at the backward limit, the lubricant application part 41 is rotated via the arm 11 by the operation of the swing cylinder 12, and the fixed dummy block is Move it to the center line of 5.

Next, when operating air is introduced into the piston rod side of the sliding cylinder 15 via the stick-slip prevention device 40, the lubricant application part 41 is brought close to the surface of the fixed dummy block 5, and at the same time, the motor 17 is The solid lubricant 10 is pressed against the dummy block 5 by rotation to make the lubricant stick.

Note that the rear end of the columnar solid lubricant 10 is inserted into the cylindrical holding member 18, and the cylindrical holding member 18 is inserted into the plate 1.
9, the solid lubricant 10 can be easily removed and replaced together with the holding member 18.

[Effects of the Invention] As is clear from the above description, the present invention automatically lubricates the end face of the fixed dummy block, making it possible to improve work efficiency and save labor.

In addition, since the present invention prevents stick-slip like in the past, it is possible to use a solid lubricant to apply lubricating oil to the tip of the fixed dummy block with a uniform thickness, and the baking of the fixed dummy block can be completely prevented. This can be prevented and the solid lubricant can be easily replaced together with the holding member.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the extrusion press according to the present invention, FIG. 1 is a front view when the fixed dummy block end face lubrication device is attached to the extrusion press, and FIG. 2 is the same as that shown in FIG. 1. 3 shows a perspective view of the fixed dummy block end face lubrication device of the extrusion press of FIG. 1. 1... Tie bar, 2... End platen, 3... Guide frame, 4... Stem, 5...
...Fixed dummy block, 6...Container,
7... Billet, 8... Die, 9... Fixed dummy block end face lubricating device, l
O...solid lubricant, 11...arm, 12.
... Swing cylinder, 13... Rack, 14... Pinion. 15...Sliding cylinder, 16...Spring, 7
...Motor, 18...Holding member, O.
...Ram cylinder, 22...Linear motion bearing box, 3.
...Pressure controller, 6...Speed controller, 0...Stick-slip prevention device, ■...Lubricant application part, 42...Base part, 3...Swing part.

Claims (1)

[Claims] When applying a solid lubricant for preventing seizure to the end face of a fixed dummy block of an extrusion press, a holding member that holds the solid lubricant is rotatable and held. The member is provided so as to be movable back and forth in the axial direction so as to be pressed against the end face of the fixed dummy block, and further,
A fixed dummy block end face lubrication device for an extrusion press in which the holding member is movable between a position facing the end face of the fixed dummy block and an external position not facing the end face, wherein the holding member is moved in an axial direction. A linear motion section, which is a motion drive source, is provided on the tie bar side via a holding member and an arm disposed in a direction intersecting the linear motion section, and a piston rod tip end engages with a sliding cylinder of the linear motion section. A linear motion bearing box is fixed to the linear motion bearing box, and the linear motion bearing box is
It is installed so that it can move forward and backward over a guide rod whose both ends are rotatably supported, and on the other hand, it consists of a speed controller, a pressure controller, and an electromagnetic switching valve that control the movement of the piston in the sliding cylinder. A fixed dummy block end face lubrication device for an extrusion press characterized by being equipped with a stick-slip prevention device.