JPH07204730A - Device for lubricating dummy block in extrusion press - Google Patents

Abstract

PURPOSE:To facilitate a constantly satisfactory application of a lubricant in applying a solid lubricant on the end face of the dummy block of an extrusion press, by simplifying a structure, minimizing a driving force and pressing the solid lubricant on the dummy block always with a proper pressing force. CONSTITUTION:An arm is bisected for which a holding member, holding a solid lubricant, freely rotatable and freely movable in the axial direction, is provided movably between the positions oppositely facing and external not oppositely facing to the end face of the dummy block; and a second arm 11b on the tip end side against the first arm 11a on the base side is provided movably in the axial direction by an actuator attached on one of the arms and a sliding member between both arms. A motor is attached to the base side of the second arm on the tip end side; and the shaft of this motor is connected, by means of a winding device, with the rotary shaft of the holding member 18 attached to the tip end side of the second arm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a solid lubricant to the end face of a dummy block, such as a fixed type, which is attached to the tip of an extrusion stem of an extrusion press and contacts a high temperature billet extruded by the extrusion press. The present invention relates to a lubricating device that is applied to prevent seizure.

[0002]

2. Description of the Related Art Conventionally, as an end surface lubricating device for a dummy block of an extrusion press, for example, JP-A-3-1462 has been known.
There is a device as described in JP-A-14. This conventional example will be described with reference to FIG. The dummy block end surface lubrication device is attached to a part of the tie bar 1 in the extrusion press, and includes a lubricant application part 41, a linear motion part 42, and a swing part 43.

The lubricant application section 41 is located at the tip of the arm 11 and includes a solid lubricant 10, a compression spring 16 and a motor 1.
7, a holding member 18 for holding the solid lubricant 10, a plate 19, a head portion 41a, and the like, and the linear motion portion 42 is at the base of the arm 11 and includes a sliding cylinder 15, a piston rod 15a, and a bearing. Box 22, bearing box 2
Two parallel guide rods 23 for two slides, guide rod support plates 25, 25a, fixed support plate 26, etc., and the swing part 43 is located at the base side of the arm 11 and has a swing cylinder 12, The rack 13 and the pinion 14 are included. The pinion 14 is provided integrally with the guide rod support plate 25a by a pipe material that penetrates the fixed support plate 26.

First, the structure of the lubricant coating section 41 will be described in detail. The column-shaped solid lubricant 10 is inserted into a plurality of cylindrical holding members 18, and the holding members 18 are attached to the plate 19 by bolting. The plate 19 is attached to the head portion 41a of the arm 11 via a compression spring 16, and softens the contact between the solid lubricant 10 and the dummy block 5 at the tip of the extrusion stem 4. Further, the motor 17 is attached to the back side of the head portion 41 a of the arm 11, and the solid lubricant 10 is transferred to the dummy block 5 by rotating the plate 19 by the motor 17.
It is designed to be applied to the end surface of.

The bearing box 22 of the linear motion section 42 of the lubricating device is fixed to the lubricant coating section 41 via the arm 11. 2 which slidably supports the bearing box 22
Of the guide rod supporting plates 25, 25a provided at both ends of the parallel guide rod 23 of the book, the sliding cylinder 15
Side guide rod support plate 25a and pinion 1
4 are arranged coaxially on both sides of the fixed support plate 26 as a center, and are integrally connected to each other by a pipe member having a piston rod 15a inserted therein and are rotatably provided.

Piston rod 15 of sliding cylinder 15
a is fixed to the side end surface of the bearing box 22 for linear movement after being inserted through the central shaft portions of the pinion 14, the fixed support plate 26, and the guide rod support plate 25a in a double pipe manner, and is used for sliding. By introducing operating air into the cylinder 15, the bearing box 22 can be axially moved back and forth on the guide rod 23. The forward and backward movement of the linear motion part 42 on the guide rod 23 of the bearing box 22 is restricted by a limit switch or the like provided on the sliding cylinder 15 part.

On the other hand, since the pinion 14 meshes with the rack 13 and the end surface of the rack 13 is fixed to the tip of the piston rod of the swing cylinder 12, it is necessary to introduce working air into the swing cylinder 12. In rack 1
3 is moved forward and backward in the direction perpendicular to the guide rod 23 of the linear motion part 42, and the pinion 14 meshed with the rack 13 is rotated to finally swing the arm 11 and the lubricant application part 41 left and right. . Now, when the operating air is introduced into the head side of the sliding cylinder 15, the lubricant application section 41 is separated from the dummy block 5, and conversely, when the operating air is introduced into the piston rod side, as shown in FIG. The lubricant application section 41 comes close to the dummy block 5.

The operation of the fixed-dummy block end surface lubrication device thus configured will be described. Before the billet in the container is extruded from the die by the extrusion stem 4 and the dummy block 5, that is, when the dummy block 5 is in the retracted limit, the swing cylinder 12 is actuated to arm the lubricant application section 41 outside the machine. The dummy block 5 is swung together with 11 and moved to the axis of the dummy block 5. Next, operating air is introduced to the piston rod side of the sliding cylinder 15 to bring the lubricant application portion 41 close to the surface of the dummy block 5, and the motor 17 is rotated to move the solid lubricant 10 to the dummy block 5. Apply by pressing.

[0009]

However, when a lubricant is applied by such a conventional lubricating device, it is not always satisfactory. That is, in the apparatus shown in FIG. 5, the two guide rods 23 serve as guides for the bearing box 22, and at the same time, the rotation of the pinion 14 is transmitted to the bearing box 22 to apply the lubricant for heavy objects through the arm 11. The part 41 must be swung. Moreover,
The guide rod 23 part is a sliding cylinder 1 for a linear motion part.
The piston rod 15a of No. 5 has a complicated structure such that the shaft center portion of the pinion 14 must be double-tube inserted and fixed to the side end surface of the bearing box 22. Further, since the shaft diameters of the guide rod 23 and the piston rod 15a cannot be made so large due to structural restrictions, there is a possibility that the guide rod 23 and the piston rod 15a will bend when twisted by rotation, and the operating and stopping positions may be reached.

Further, in the above-mentioned apparatus, when the lubricant coating portion 41 is moved in the axial direction, it is necessary to move the whole arm from the root of one arm 11, and the force required for the movement is also
Therefore, a great amount of power was needed. In addition, the relatively large motor 17 causes the lubricant applying portion 41 at the tip of the arm 11 to move.
Since the lubricant application section 41 is swung, a relatively large weight object having a large inertial force is swung, so that a large amount of power or stopping force is required. Necessary and lubricant application part 41
It was necessary to make the supporting part of the tougher by that amount.

Further, the sliding cylinder 15 for the linear motion part
Since it is a general-purpose air cylinder, even if the air source is cut off,
The lubricant applicator 41 cannot stop suddenly due to inertial force, approaches the dummy block 5 too much beyond the compression limit deflection of the compression spring 16 and increases the pressing force, so that the solid lubricant 10 is applied to the dummy block 5 more than necessary. As a result, the lubricant 10 is applied to the product, and as a result, the lubricant 10 is rolled into the product, the product is deteriorated, and the consumption of the lubricant 10 is increased, which is uneconomical.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to structurally separate the linear motion portion and the swing portion in the dummy block end surface lubricating device. In addition, the rotary drive source of the solid lubricant is moved to the vicinity of the root of the arm to simplify the structure and provide strength, and to provide a device in which the lubricant application part contacts the dummy block with appropriate pressure. is there.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and when a solid lubricant is applied to an end surface of a dummy block of an extrusion press, a holding member holding the solid lubricant is provided. The dummy block is provided rotatably at a position facing the end surface and movable in the axial direction so that the solid lubricant can be pressed against the end surface of the dummy block, and the holding member is positioned at the position facing the end surface of the dummy block. In a dummy block lubrication device of an extrusion press attached to the tip of an arm provided so as to be movable between an external position that does not face each other, the arm is divided into two parts, and the tip side with respect to the first arm on the root side. Second arm is provided movably in the axial direction by an actuator attached to one arm and a sliding member between both arms, and the root side of the second arm on the tip side Install the motor, linked by the wrapping device between a rotating shaft of the holding member attached to the distal end side of the shaft and a second arm of the motor.

In the above apparatus, the holding member may be the second member.
It is provided movably in the axial direction with respect to the tip side of the arm, and the spring acting in the axial direction for pressing the solid lubricant against the end surface of the dummy block is provided between the holding member and the tip side of the second arm and the holding member A second position is provided by a position detecting device for position detection, and when the position detecting device detects a predetermined approach distance between the holding member and the tip end side of the second arm, the second arm is actuated to move the second arm in the axial direction. A sequencer for stopping the forward movement of the arm was provided.

[0015]

[Operation] The holding member holding the solid lubricant is moved from the outside of the machine not facing the end surface of the dummy block to the same axis as the dummy block, which is the position facing the end surface of the dummy block, and then the motor is turned on. Driven to rotate the holding member and the solid lubricant through the winding device, operate the actuator to move the holding member forward,
Apply the solid lubricant by pressing the end face of the dummy block with the optimum force.

In this case, since the linear motion part for bringing the lubricant application part close to the dummy block is separated from the axis of the orthogonal movement part such as the swing part and provided in the middle of the arm, the axis of the orthogonal movement part is thick with high rigidity. It can be a single shaft, which simplifies the structure of the shaft. Further, by simplifying the structure of the arm root portion and providing the lubricant rotational drive source on the root side of the arm, the weight and inertia of the swing portion are reduced, and control is easy. Also, when the spring of the lubricant application part reaches a predetermined compression length, the position detection device operates, the actuator of the linear motion part stops, and the force of pressing the dummy block of the lubricant application part is appropriate. Hold the pressure.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to one embodiment shown in the drawings. 1 to 4 show an embodiment of an extrusion press according to the present invention. FIG. 1 is an overall view and a fluid pressure circuit diagram when a dummy block lubricating device is attached to an extrusion press, FIG. 2 is an enlarged view taken along the line AA of FIG. 1, and FIG.
FIG. 4 is a perspective view showing a detailed structure of the dummy block lubricating device of the extrusion press, and FIG. 4 is a partial vertical sectional view showing a lubricant applying portion.

In the extrusion press shown in FIG. 1, 1 is a tie bar, 2 is an end platen, 3 is a guide frame, and 20 is a guide frame.
Is a ram cylinder, and 8 is a die device. This apparatus has a structure in which a billet 7 in a container 6 is extruded by a fixed type dummy block 5 attached to the tip of an extruding stem 4 of a ram cylinder 20.

The dummy block lubricating device 9 of the present invention is attached to the tie bar 1 of the extrusion press. As shown in FIG. 3, the dummy block lubricating device 9 includes a lubricant applying portion 41,
It is composed of a linear motion part 42, a swing part 43, a sliding actuator drive device part 40, and the like. The lubricant application part 41 is composed of the first arm 11a and the second arm 11b.
The second arm 11b on the tip side of the arm 11 divided into two
The solid lubricant 10, the compression spring 16, the holding member 18, the plate 19, the head portion 41a at the tip of the second arm 11b, the proximity switch 21, and the like, and the linear motion portion 42 At the connecting portion between the first arm 11a and the second arm 11b, a sliding cylinder 15, which is one type of actuator, a linear motion member 22a, a guide 23.
A linear bearing (not shown) is used for the sliding portions of the linear motion member 22a and the guide 23a to reduce the power required for linear sliding.

Further, the swing part 43 includes the first arm 11
At the base of a, the swing cylinder 12, rack 13 and pinion 14, cylindrical bearing box 22, thick 1
The book 27 includes a rod 27, a bearing 24, and the like. Further, in the sliding actuator drive unit 40, an air cylinder with a brake is used as the sliding cylinder 15, and forward and backward electromagnetic switching valves 40a, 40 are used in the air circuit.
b, electromagnetic switching valve 40c for brake operation, silencer 40
d, a check valve 40e, etc. are incorporated as shown in FIG.

First, the structure of the lubricant coating section 41 will be described in detail. As shown in FIG. 4, the column-shaped solid lubricant 10
Are inserted into a plurality of cylindrical holding members 18, for example, two to three, and the holding members 18 are attached to the plate 19 by bolting. However, the plate 19 has a holding member 1
Depending on the number of eight, a thin cutout groove 19a is provided from the outer peripheral portion toward the axial center portion, and a bolt 19b is provided through the cutout groove 19a. Then, by loosening the bolt 19b a little and moving it in the diametrical direction in the cutout groove 19a, the diametrical position of the holding member 18 can be adjusted appropriately. This is because the position of the solid lubricant 10 can be adjusted appropriately according to the diameter of the dummy block 5. Normally, as shown in FIG. 4, the outermost peripheral portion of the solid lubricant 10 is located slightly outside the outer diameter position of the dummy block 5.

The plate 19 is attached to the head portion 41a at the tip of the second arm 11b at the tip of a rotary shaft 30 which is rotatably mounted by a bearing 29.
It is mounted so as to rotate integrally with the rotary shaft 30 via a, but to be slidable in the axial direction. A compression spring 16 is provided between the plate 19 and the head portion 41a. That is, the plate 19 is the compression spring 1
It is attached to the head portion 41a via 6 so that the solid lubricant 10 and the dummy block 5 can be softened. 30b is a stopper for the head of the rotary shaft 17b. In this embodiment, the plate 19 is shown as a perfect disc, but
In order to reduce the weight, for example, a ring-shaped member may be perforated such that one plate is bridged in the diameter direction.

In order to prevent the plate-like solid lubricant 10 from being crushed due to the plate 19 coming too close to the dummy block 5, a proximity switch 21 is installed on the plate 19 and the head portion 41a side is provided. The rod 41b is provided, and when the compression spring 16 is compressed by a predetermined amount, the proximity switch 21 senses the pressing force from the head portion 41a side to excite the electromagnetic switching valve 40c to stop the operation. Air can be supplied to the sliding cylinder 15 and the piston rod 15a can be tightened to stop its forward movement.

A small chain wheel 31 is attached to the opposite side of the rotary shaft 30, and as shown in FIG. 3, a small air motor 3 attached to the base of the second arm 11b.
A chain 33 that transmits the rotational force from 2 is wrapped around. In FIG. 3, 34 is a small chain wheel attached to the motor shaft of the motor 32.
Chain 33 is wound around 4, 31. If a small and lightweight air motor 17 is attached to a portion close to the root of the second arm 11b, the whole can be made lighter and can be smoothly moved with a relatively small force. The columnar solid lubricant 10 is evenly and evenly applied to the end surface of the dummy block 5.

The linear motion part 42 including the sliding cylinder 15 and the like of the lubricating device 9 is attached to the first arm 11a integrally provided in the slidable cylindrical bearing box 22. The 41st side 2nd arm 11b is attached through the linear motion member 22a. First arm 11a
Two rectangular tube-shaped guides 23 provided in parallel at the tip of the
A linear motion member 22a is slidably provided in a, and the forward and backward movement of the linear motion member 22a is provided on the piston rod 15a of the sliding cylinder 15 and the rod side of the sliding cylinder 15. Brake compartment 15
It is regulated by the operation of b. Then, when the piston in the sliding cylinder 15 moves back and forth in the sliding cylinder 15 in the axial direction, the proximity switch 21 of the plate 19 detects the preset compression position of the compression spring 16, Detect the position of the piston,
The movement of the head portion 41a is restricted. Since an air cylinder device with a brake is used for the sliding cylinder 15, the head portion 41a stops at an appropriate place.

The swing unit 43 is a swing cylinder 12
The rack 13 and the pinion 14 are operated by the operation of, and the rod 27 coaxial with the pinion 14 is rotated. The rod 27 is one shaft having high rigidity, and both ends thereof are supported by bearings 24. The rotation of the rod 27 is transmitted to the bearing box 22 by a key (not shown) to swing the bearing box 22. When the bearing box 22 swings, the lubricant application section 41 swings left and right via the arm 11 including the arms 11a and 11b.

The operation of the dummy block lubricating device 9 thus constructed will be described. Before the billet 7 is extruded by the extruding stem 4 and the dummy block 5, that is, when the dummy block 5 is in the backward limit as shown in FIG.
The dummy block 5 is swung via the arms 11a and 11b and moved to the axis of the dummy block 5.

Next, operating air is introduced to the piston rod side of the sliding cylinder 15 to bring the lubricant application portion 41 close to the surface of the dummy block 5, and at the same time, the motor 32 is rotated to cause the solid lubricant 10 to rotate. While being rotated, it is pressed against the dummy block 5 in a high temperature state to apply it uniformly. At this time, the solid lubricant 10 is pressed while being rotated in a certain direction, so that it is applied uniformly.

Since the pressing force for pressing the lubricant application portion 41 against the dummy block 5 is constant only by the pressing force of the compression spring 16, the solid lubricant 10 will not excessively adhere to the dummy block 5. That is, when the sliding cylinder 15 that produces a force larger than the force of the compression spring 16 is operated to press the solid lubricant 10 against the dummy block 5, the compression spring 16 contracts slightly and the proximity switch 21 operates to move forward. Since the pressing is stopped, the pressing force is maintained at a substantially constant and appropriate amount, and an appropriate amount of lubrication is performed.

After that, even when the amount of the solid lubricant 10 is reduced when the solid lubricant 10 is applied, it is pressed and applied only by the force of the compression spring 16. If the position detecting device such as the proximity switch 21 is not provided, the pressing force is too large because the sliding cylinder 15 presses, and the lubricant is excessively applied and the consumption amount is also increased. Too many, which is not desirable. Further, even if the position detecting device is provided to stop the sliding cylinder 15, the inertia of the movement does not cause a smooth stop and the solid lubricant 10 is pressed more than necessary. Also, when the position detection device operates, the supply of air for advancing to the sliding cylinder is stopped, air is supplied to the brake chamber 15b, the brake is operated, and the piston rod 15a is tightened. I tried to stop moving forward. Instead of the proximity switch 21, another sensor such as a limit switch or a magnetic sensor may be used as the position detecting device.

When the application of the solid lubricant 10 is completed, the sliding cylinder 15 is operated to slightly retract the lubricant application portion 41 to separate the solid lubricant 10 from the end surface of the dummy block 5, and then the motor 32 is used. The rotation of the cylinder is stopped and the swing cylinder 12 is operated to swing the lubricant coating section 41 and move it to a position where it does not interfere with the extrusion work.

In the above embodiment, when the lubricant coating section 41 is moved between the position facing the end face of the dummy block 5 and the position outside the machine which is not facing, the swing part 43 is used. Although 11 is rocked, this can also be done by moving the arm 11 in a direction perpendicular to the axis of the dummy block 5.

If this is done, when extrusion is carried out using a rectangular dummy block having an elliptical or elliptical cross section, which is usually called extrusion using a square container, It is also possible to move the solid lubricant 10 in the horizontal direction perpendicular to the axis of the dummy block 5 to satisfactorily lubricate the end surface of the rectangular dummy block. However, in that case, only the lubricant application portion 41 and other necessary portions are attached to the dummy block 5 with respect to the second arm 11b.
It can also be moved in a horizontal direction perpendicular to the axis of the.

In this device, if a through hole is provided in the shaft core portion of the lubricant application portion 41 and a thin shaft mandrel can be inserted into the through hole, it also functions as a core rod. It can also be used when a solid lubricant is applied to the end surface of a dummy block of a double-acting type extrusion press for obtaining a tubular extruded product using a mandrel. In the fluid pressure circuit, air pressure or oil pressure can be used. Further, the rotation transmission device using the winding device including the chain and the chain wheel may be other commonly used devices such as a rope winding device and a gear transmission device.

[0035]

As is apparent from the above description, in the present invention, when applying the solid lubricant to the end surface of the dummy block of the extrusion press, the holding member holding the solid lubricant is applied to the end surface of the dummy block. Rotate freely in the facing position,
Also, the solid lubricant is provided so as to be movable in the axial direction so that it can be pressed against the end face of the dummy block, and the holding member is provided so as to be movable between a position facing the end face of the dummy block and an external position not facing the dummy block. In a dummy block lubricating device for an extrusion press attached to the tip of an arm, an actuator in which the arm is divided into two, and a second arm on the tip side is attached to one arm with respect to a first arm on the root side. Since it is provided so as to be movable in the axial direction by the sliding member between both arms, the linear motion part that moves the solid lubricant closer to and further away from the dummy block, and the head part where the solid lubricant is attached are attached to the end surface of the dummy block. Since the drive unit for moving between the position facing the and the position not facing is separated, the structure of the drive becomes relatively simple. For example, the structure of the rod of the drive unit is not complicated, one thick rod with high rigidity can be used, it is strong, and there is no fear of bending during swinging.
And the operation is smooth and reliable.

When the holding member for the solid lubricant is moved in the axial direction, it is not necessary to move the arm from the root, and the force required for the movement is small. Further, since the motor is attached to the base side of the second arm on the tip side and the shaft of the motor and the rotary shaft of the holding member attached to the tip side of the second arm are connected by the winding device, The weight of the tip of the arm can be reduced. As a result, when the head portion such as the solid lubricant holding member is moved between the position facing the end face of the dummy block and the position not facing the dummy block, the inertial force is correspondingly reduced and a relatively small force is applied. It can be moved smoothly.

Further, a holding member is provided movably in the axial direction with respect to the tip end side of the second arm, and the solid lubricant is pressed against the end face of the dummy block between the holding member and the tip end side of the second arm. And a position detecting device for detecting the position of the holding member, and when the position detecting device senses a predetermined approach distance between the holding member and the tip side of the second arm, the second arm is moved to the axis line. Since the sequencer for stopping the forward movement of the second arm by the operation of the actuator for moving in the direction is provided, if the position detecting device detects an excessive pressing force of the solid lubricant against the dummy block, it moves in the axial direction. Since the actuator for use stops its operation, the solid lubricant can always be pressed against the dummy block with an appropriate pressing force. Therefore,
It is possible to always and easily apply a uniform lubricant without causing excessive application or application unevenness.

[Brief description of drawings]

FIG. 1 is a front view and a fluid pressure circuit diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged view taken along the line AA of FIG.

FIG. 3 is a perspective view of an embodiment of the present invention.

FIG. 4 is a partial vertical cross-sectional view showing an embodiment of the lubricant applying portion of the present invention.

FIG. 5 is a perspective view showing an example of a conventional device similar to the present invention.

[Explanation of symbols]

 1 tie bar 4 extrusion stem 5 dummy block 6 container 7 billet 8 die device 9 dummy block lubrication device 10 solid lubricant 11 arm 11a first arm 11b second arm 12 swing cylinder 13 rack 14 pinion 15 sliding cylinder 15b brake chamber part 16 Compression Spring 17,30 Motor 18 Holding Member 19 Plate 20 Ram Cylinder 21 Proximity Switch 22 Bearing Box 22a Linear Motion Member 23a Guide 27 Rod 30 Rotation Shaft 31,34 Chain Wheel 33 Chain 40 Sliding Actuator Drive Unit 40a, 40b, 40c Electromagnetic switching valve 41 Lubricant application part 41a Head part 42 Linear motion part 43 Swing part

Claims (2)

[Claims] 1. When applying a solid lubricant to an end surface of a dummy block of an extrusion press, a holding member holding the solid lubricant is rotatable at a position facing the end surface of the dummy block, and the solid lubricant is applied to the end surface of the dummy block. At the tip of the arm, which is movably provided in the axial direction so that it can be pressed against the end face of the dummy block, and the holding member is movably provided between a position facing the end face of the dummy block and an external position not facing the dummy block. In the attached dummy block lubrication device of the extrusion press, the arm is divided into two, and the second arm on the tip side with respect to the first arm on the root side is provided between the actuator attached to one arm and both arms. A holding member that is provided so as to be movable in the axial direction by a sliding member, has a motor attached to the base side of the second arm on the tip side, and has the axis of this motor and the tip side of the second arm A dummy block lubrication device for an extrusion press, which is connected to the rotating shaft of the device by a winding device. 2. A holding member is provided movably in the axial direction with respect to the tip side of the second arm, and the solid lubricant is pressed against the end surface of the dummy block between the holding member and the tip side of the second arm. And a position detecting device for detecting the position of the holding member, and when the position detecting device senses a predetermined approach distance between the holding member and the tip side of the second arm, the second arm is moved to the axis line. The dummy block lubricating device for an extrusion press according to claim 1, further comprising a sequence device for stopping the forward movement of the second arm due to the operation of the actuator that moves in the direction.