JP2000312915A - Extruding method with extruding press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce idle time and improve productivity by moving back an extruding stem and a container after billet extruding is completed, raising a billet loader in the meantime, and subsequently loading a billet, and simultaneously, lowering a shearing equipment to cut a discard. SOLUTION: This method uses such an extruding press that a billet loader to transfer a billet 38 to a billet loading port 39 of a container 14 is integrally provided so as to be able to move back and forth together with the container 14. After the billet 38 is extruded, the extruding stem 28 and the container 14 are moved back to have them separated from dies 40, and at the same time, the billet loader loaded with the billet 38 between the container 14 and the extruding stem 28 is raised. Subsequently as the extruding stem 28 moves forward, the billet 38 is loaded into the billet loading port 39, and at the same time, the shearing equipment is lowered to cut the discard 96, and then the container 14 is moved forward and brought into contact with the dies, and the extruding stem 28 is moved forward to complete the extruding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion method using an extrusion press, and more particularly to an extrusion method suitable for reducing the idle time of an extrusion press.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show an extrusion method using a conventional extrusion press. First, after a series of extrusion is completed (FIG. 10A), the container 14 is separated from the die 40 and the extrusion stem 28 is retracted. Subsequently, after lowering the shear device 55 between the container 14 and the die 40 to cut the discard 96, the shear device 55 is raised again (FIG. 10 (2)).

Thereafter, the container 14 is brought into contact with the die 40 (FIG. 10 (3)). On the other hand, the billet 38 is raised between the container 14 and the extrusion stem 28 while being placed on the billet loader (FIG. 11A). Subsequently, the extrusion stem 28 is advanced to load the billet 38 into the billet loading port 39 (FIG. 11 (2)). Thereafter, when the extrusion stem 28 is continuously advanced, the billet 38 is extruded from the die 40, and an extruded product is obtained.

[Problems to be solved by the invention]

However, since the operation of cutting the discard 96 by the shearing device 55 and the operation of loading the billet 38 into the billet loading port 39 by the advancement of the extrusion stem 28 are performed separately, the idle time becomes longer and the productivity is increased. There was a problem of lowering.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a molding method using an extrusion press capable of shortening the idle time of the extrusion press and improving productivity. It is in.

[0006]

In order to achieve the above object, in the invention according to the present invention, a billet loader for transferring a billet to a billet loading port of a container is integrally provided so as to be movable back and forth together with the container. Using an extrusion press, after the extrusion of the billet is completed, the extruding stem and the container are retracted to separate the container from the die, and the billet loader on which the billet is placed between the container and the extruding stem is raised. With the advance of the stem, the billet is loaded into the billet loading port of the container, and at the same time, the shearing device is lowered to cut the discard, and then the container is advanced, and the extruding stem is advanced while the container is in contact with the die, and extruded. To complete

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An extrusion press according to an embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an explanatory view of the operation, FIG. 2 is an explanatory view showing the continuation of the operation following FIG. 1, FIG. 3 is a longitudinal sectional view of the extrusion press, FIG. 4 is a plan view of the extrusion press, and FIG. FIG. 6 is a front view from A to A, FIG. 6 is a plan view from B to B in FIG. 5, FIG. 7 is a front view of the second transfer means, and FIG. 8 is a second view from C to C in FIG.
FIG. 9 is a side view of the transfer means, and FIG. 9 is a cutaway view as seen from D to D in FIG.

Reference numeral 10 denotes an end platen, 12 denotes a die slide provided with a die for extruding a product, 14 denotes a container for loading a billet for extruding a product, 16 denotes a main cylinder, 1
8 is a main ram for product extrusion, 20 is a main crosshead integrally attached to the tip of the main ram 18, 22 is a tie rod, 24 is a machine base, and 26 is a cylinder for retracting the main crosshead.

An extruding stem 28 extending toward the end platen 10 is attached to the tip of the main crosshead 20 in the axial direction which is the forward and backward direction of the main crosshead 20. Reference numeral 28a indicates a Fick Dammy block. Reference numeral 40 denotes a die, and the container 14 is moved forward and the die 4
The first billet loader 3 serving as the first transfer means is located below the end surface of the container 14 on the side of the extrusion stem 28 when the container 14 comes into contact with the first billet loader 3.
0 is disposed horizontally in the machine width direction.

As shown in FIG. 6, the first billet loader 30 includes a telescopic cylinder 41, a moving frame 42, a linear guide 43, a holding portion 44, a swing arm 45, a tilt stopper 46, and a stopper for restricting a retraction limit of the tilt stopper. 47 (4
8) and a fixed frame 50.

As shown by a broken line in FIG. 5, the first billet loader 30 receives the billet 38 transported by the billet carrier 60 at the time when the first billet loader 30 moves forward, and at the retracted position, the second billet loader described later. The container 32 is tilted to the same position as the lower limit position of the container 32 and transferred to the second billet loader 32 provided on the side of the container 14.

That is, first, the billet carrier 60 has an inclined table 62 installed near the base surface of the molding machine, and a delivery holder 64 for bridging to the first billet loader 30 is mounted via the inclined table 62. ing.
The delivery holder 64 has a V-shaped billet receiving portion, and is attached to a support shaft 66 so that the receiving portion can be turned. It can be oscillated by a cylinder mechanism (not shown), receives the billet 38 with the V-shaped receiving portion opening first toward the upstream side of the inclined table 62, and further rotates downstream to hold the first billet loader 30. It is driven so as to send it to the section 44.

The billet carrier 60 supplies the billets 38 to the first billet loader 30 one by one. Therefore, the first billet loader 30 is arranged to face the billet carrier 60. A telescopic cylinder 41 having an extensible rod 41a is disposed at one end of the fixed frame 49 in the axial direction, and a distal end of the rod 41a is connected to the moving frame 42 via a connecting member 51. Have been.

A linear guide 43 is provided on both sides in the longitudinal direction of the fixed frame 49, and the moving frame 42 can move forward and backward along the linear guide 43. Fixed frame 4
On both sides of the telescopic cylinder 41 attached to one end 49a of the telescopic cylinder 9, a pair of stoppers 47, 48 for restricting retraction of the telescopic cylinder are arranged in the same direction and apart from the telescopic cylinder 41, respectively.

A pair of rod-shaped movable frame stoppers 47 for restricting retraction of the movable frame mounted above one end 49a of the fixed frame 49.
Regulates the retreat limit of the moving frame 42,
By rotating a, the stopper 4 for restricting the backward movement of the moving frame 4
The structure is such that the movable frame 42 can be moved backward and forward seven times to determine the retreat position.

On the other hand, a pair of rod-shaped tilting stopper retraction limit stoppers 48 attached to the lower side of one end side 49a of the fixed frame 49 are provided at the lower rear portion of the movable frame 42 at the retracted position of the movable frame 42. By rotating the adjusting screw 48a, the stopper 48 for limiting the retraction limit of the tilting stopper is moved forward and backward to determine the retreat position of the tilting stopper 46.
6, the billet 38 placed on the holding portion 44 at the tip of the swing arm 45 can be tilted and raised to the intermediate stop standby position around the rotation support shaft 50.

Next, the second transfer means (second billet loader 32) will be described. The second billet loader 32 receives a billet 38 as a molding material transported to the intermediate stop standby position by the first billet loader 30 and transports and supplies the billet 38 to a billet loading port 39.
As shown in FIG. 7, the second billet loader 32 is provided on the lower side of the container 14 on the side of the extrusion stem 28.
A fixed frame 29 that protrudes to the side is attached, and a second billet loader 32 is fixed to the side end surface of the container 14 so as to be able to move integrally with the container 14, and includes a first loader 34 and a second loader 36.

The second billet loader 32 is adjacent to the container 14 and can be tilted and tilted by a first loader 34 (FIG. 5).
It is constituted by a tiltable second loader 36 (FIG. 8) adjacent to the loader 34. This second billet loader 32
Is provided with a swing arm 34A of the first loader 34 and a swing arm 36A of the second loader 36 which are arranged to face the first billet loader 30 and are formed to be pivotable along a plane perpendicular to the extrusion center line of the molding machine. I have.

That is, the swing arms 34A, 36A
Both are pivotally connected at one end to a pivot center 68 disposed at the upper inside of the lower tie rod 22. The upper end of the fixed frame 29 is provided with a lift restricting stopper 7.
A lowering stopper 72 is provided at the lower end of the first billet loader 30 so that the billet 38 can be easily transferred with the second billet loader 32 facing the first billet loader 30. The lower limit of the two billet loader 32 is restricted.

On the other hand, when the billet 38 received from the first billet loader 30 by the billet loader 32 of the second loader 36 is conveyed to the billet loading port 39 via the intermediate stop standby position, the rising regulation stopper 70 moves the second billet. The upper limit of the second billet loader 32 is regulated so that the billet 38 on the loader 32 can be easily loaded into the billet loading port 39.

First swing arm 34 of first loader 34
A is connected to A through a first clevis 75 fixed to the tip of a piston rod 74a of a first hydraulic drive cylinder device 74, and the first swing arm 34A is shown by a broken line in FIG. The drive is performed between the lower limit position and the upper limit position indicated by the solid line.
The first swing arm 36A of the second loader 36 is also connected to the first swing arm 3A of the first loader 34 as shown in FIG.
It has the same configuration as 4A. That is, the second swing arm 36A of the second loader 36 is connected via the second clevis 77 fixed to the tip of the piston rod 76a of the second hydraulic drive cylinder device 76, and the rod 76
The second swing arm 36A is driven between the lower limit position shown by the broken line in FIG. 5 and the upper limit position shown by the solid line by the expansion and contraction operation of a.

Here, the first swing arm 34A and the second swing arm 34A
Since the swing arm 36A has the same structure, the first swing arm 34A will be described as a representative.
A billet holder 78 is attached. The first billet holding portion 78 has three pedestals 82 for supporting the lower surface of the billet 38 so that the supported billet 38 is stably held. Here, the second swing arm 36A has a configuration having the second billet holding portion 80.

A clamp arm 84 is provided at one end of the first billet holder 78 attached to the tip of the first swing arm 34A via a support shaft 83.
On the other hand, the connecting material 85 fixed at a fixed angle to the lower end of the clamp arm 84 is fixed to the billet 38 by the clamp arm 84.
Is connected to the tip of a rod 86a of an auxiliary cylinder 86 that clamps or releases the clamp arm 84. The clamp arm 84 is swung by the expansion and contraction of the rod 86a.
The auxiliary cylinder 86 is attached to a bracket 87 fixed to a side end of the first swing arm 34A or the second swing arm 36A.

Therefore, in the first billet holding portion 78 (second billet holding portion 80), the billet 38 is held at least at three points by the pedestal 82 and the clamp arm 84,
Dropping during transfer is prevented. Here, reference numeral 88 denotes a container rod, which is provided diagonally above and below the container 14, connects the end platen 10 to the container 14, and uses a container cylinder (not shown) provided on the end platen 10. Expand and contract 88,
The container 14 is configured to be able to contact and separate from the die 40.

Here, the first loader 34 and the second loader 36 of the second billet loader 32 are connected to the container 1 as shown in FIG.
4 is fixed to the side end surface of the extrusion stem 28 so as to protrude therefrom. In particular, the second billet loader 32 is functionally arranged to reduce the size of the entire extrusion press apparatus and improve the maintenance without impairing the conventional press performance. The first hydraulic drive cylinder device 74 and the second hydraulic drive cylinder device 76 are juxtaposed at close positions.

On the other hand, these first hydraulic drive cylinder devices 7
By using the fourth and second hydraulic drive cylinder devices 76 as drive sources, the first swing arm 34A and the second swing arm 36A are tilted to an appropriate angle, respectively, so that the billet 38 can be transferred and the billet loading port 39 can be securely carried out. And the axis of the first hydraulic drive cylinder device 74 and the first
The axes of the billet holding portions 78 are not aligned as in the prior art and are displaced.

Similarly, the axis of the second hydraulic drive cylinder device 76 does not coincide with the axis of the second billet holder 80,
The second billet holder 80 is provided with the second hydraulic drive cylinder device 7.
6 is formed so as to protrude greatly from the axial position toward the extrusion stem 28 side. FIG. 9 is a cross-sectional view of the turning center portion 68 taken along a line D-D in FIG. The first loader rotation shaft 90 that forms the center of rotation of the first loader 34 and the second loader rotation shaft 92 that forms the center of rotation of the second loader 36 are non-removably fitted to the above-described rotation center 68. They are configured to be slidable with each other.

A protruding plate member 93 is provided at the center of the first loader rotation shaft 90 which is orthogonal to the central axis extension line of the first hydraulic drive cylinder device 74 which forms a part of the configuration of the first loader 34.
Is fixed, and is rotatably connected to the projecting plate member 93 and a first clevis 75 disposed at the tip of the first hydraulic drive cylinder device 74. The second hydraulic drive cylinder device 76 of the second loader 36 also has one end of the second loader rotation shaft 92 orthogonal to the central axis extension line of the second hydraulic drive cylinder device 76, similarly to the first hydraulic drive cylinder device 74. A protruding plate member 94 is fixed to the portion.
And a second hydraulic drive cylinder device 76
It is rotatably connected to the clevis 77.

The first loader 34 (36) can be tilted to a desired position by expanding and contracting the piston rod 74a (76a) of the first hydraulic drive cylinder device 74 (76). As shown in FIG. 9, the axial position of the first loader 34 is different from the axial position of the first hydraulic drive cylinder device 74, that is, the first hydraulic drive cylinder device 7
4 is closer to the container 14 side, and conversely, the first loader 34 protrudes toward the extrusion stem 28, and the second loader 36 also has the second loader 3 like the first loader 34.
The position of the axis of No. 6 and the position of the axis of the second hydraulic drive cylinder device 76 are considerably deviated from each other. In addition,
Reference numeral 55 indicates a shear device.

The operation of the first billet loader 30 and the second billet loader 32 configured as described above is as follows.

First, when the extrusion of the billet 38 in the container 14 is completed, the container 14 is once separated from the die 40 and is retracted together with the extrusion stem 28 in the retreat limit direction (FIG. 1 (1)). Next, the shear device 55 is lowered and raised with respect to the discard 96, and
The extruding stem 28 is sufficiently retracted so that the second billet loader 32 can be raised between the extruding stem 28 and the extruding stem 28.

Next, the first swing arm 34A and the second swing arm 36A are raised by retracting the piston rods 74a, 76a of the first hydraulic drive cylinder 74 and the second hydraulic drive cylinder 76 of the second billet loader 32, respectively. And the first billet holding portion 78 and the second billet
While the billet 38 is held in the billet holding portion 80, the billet 38 is positioned so that it can be loaded into the billet loading port 39 (FIG. 1).
(2)).

Subsequently, the shear device 55 is lowered with respect to the discard 96 to cut the discard 96, and at the same time, the shear device 55 is raised. Then, the extrusion stem 28
Is advanced, and the billet 38 placed on the second billet loader 32 is loaded through the billet loading port 39 of the container 14. Note that, with the advance of the extrusion stem 28, the second
The billet loader 32 is lowered to a position where it does not interfere with the main crosshead 20 at the tip of the main cylinder 16 (FIG. 1 (3)).

The discard 96 is formed by the shearing device 55.
Is cut and removed, the container 14 is drawn to the die 40 again while raising the shearing device 55, and at the same time, the extruding stem 28 is advanced by synchronizing. At this time container 1
4 contacts the die 40, and in this state, the extrusion stem 28 is continuously advanced (FIG. 2 (1)).

During the operation of extruding the billet 38 from the die 40 to obtain the extruded product 85, the first billet loader 3
In the case of 0, the rod 41a of the telescopic cylinder 41 is extended as shown in FIG. 5, the holding portion 44 is horizontally moved to the forward limit, and is opposed to the billet carrier 60. Then, the delivery holder 6 of the billet carrier 60
4 is turned, and the billet 38 enters the holding portion 44. In this state, the rod 41a of the telescopic cylinder 41
Is further reduced to the retreat limit.
Of the swing arm 45 of the second billet loader 32 is tilted up to the point where the holding portion 44 is located at the lower limit position of the second billet loader 32. Then, the billet 38 is transferred from the first billet loader 30 to the second billet loader 32.
(FIG. 2 (2)).

Subsequently, the extrusion stem 28 continues to advance to the extrusion completion position, and the extrusion is completed with the discard 96 remaining (FIG. 2 (3)).

[0038]

As is apparent from the above description, in the present invention, a billet loader for transferring a billet to a billet loading port of a container is provided by using an extrusion press integrally provided so as to be able to move back and forth together with the container. After the extrusion of the billet is completed, the extruding stem and the container are retracted to separate the container from the die, and the billet loader having the billet loader placed between the container and the extruding stem is raised, and then the extrusion stem is advanced. At the same time, the billet is loaded into the billet loading port of the container, and at the same time, the shearing device is lowered to cut the discard, and then the container is advanced, and the extrusion stem is advanced while the container is in contact with the die to complete the extrusion. This eliminates the time required to raise the billet loader and advance the extruder stem as in the past. Since it is, it is possible to improve the productivity by shortening the idle time of the extrusion press.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation of an extrusion press.

FIG. 2 is an explanatory diagram showing a continuation of the operation following FIG. 2;

FIG. 3 is a longitudinal sectional view of an extrusion press.

FIG. 4 is a plan view of an extrusion press.

FIG. 5 is a front view as viewed from A to A in FIG. 3;

FIG. 6 is a plan view seen from BB in FIG. 5;

FIG. 7 is a front view of the second transfer means.

FIG. 8 is a side view of the second transfer means as viewed from C to C in FIG. 7;

FIG. 9 is a cutaway view as seen from DD in FIG. 7;

FIG. 10 is a process chart showing an operation procedure of a billet loader of a conventional extrusion press.

FIG. 11 is a process chart showing an operation procedure following FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 End platen 12 Die slide 14 Container 16 Main cylinder 20 Main crosshead 22 Tie rod 26 Main crosshead retraction cylinder 28 Extrusion stem 28a Fixed dummy block 29 Fixed frame 30 First transfer means (first billet loader) 32 Second transfer Means (Second Billet Loader) 34 First Loader 34A First Swing Arm 36 Second Loader 36A Second Swing Arm 38 Billet 39 Billet Loading Port 40 Dice 41 Telescopic Cylinder 42 Moving Frame 44 Holder 45 Swing Arm 46 Tilting Stopper 47 Moving frame retraction limit stopper 48 Tilt stopper retraction limit stopper 49 Fixed frame 50 Rotating support shaft 55 Shear device 60 Billet carrier 64 Sending out holder 70 Ascent limit stopper 7 Lowering stopper 75 First clevis 76 Second hydraulic drive cylinder device 77 Second clevis 78 First billet holding portion 82 Pedestal 83 Support shaft 84 Clamp arm 85 Connecting member 86 Auxiliary cylinder 88 Container rod 90 First loader rotating shaft 92 2 Rotor shaft for loader 93, 94 Veneer member 95 Extruded product 96 Discard

Claims (1)

[Claims] An extruder in which a billet loader for transferring a billet to a billet loading port of the container is integrally provided so as to be able to move back and forth together with the container, and after the extrusion of the billet is completed, the extrusion stem and the container are retracted. The container is separated from the die and the billet loader on which the billet is placed between the container and the extrusion stem is raised, and the billet is successively loaded into the billet loading port of the container as the extrusion stem advances, and at the same time, the shearing device is mounted. The extrusion method using an extrusion press, characterized in that the extruder is lowered to cut the discard, and then the container is advanced and the extrusion stem is advanced while the container is in contact with the die to complete the extrusion.