JP2020138229A - Billet feeding device and billet feeding method - Google Patents

Abstract

To provide a billet feeding device and method of a rear loading type extrusion press device capable of inhibiting the action of reaction force against an insertion resistance force in a billet insertion in a container on the billet feeding device.SOLUTION: A billet feeding device 100 for a rear loading type extrusion press device comprises a billet holding mechanism 30 holding a billet B, and a billet insertion mechanism 40 for pressing the billet B by a pressing member BS to insert in a container 5. The billet holding mechanism 30 has a holding mechanism body part 31 at which a fixed holding part 32 is arranged, and a movable holding part 33 opening/closing facing the fixed holding part 32. The billet feeding device is characterized in that the billet insertion mechanism 40 is disposed at the holding mechanism body part 31 and when inserting the billet B in the container 5 by the billet insertion mechanism 40, a contact part 36 contacting the billet holding mechanism 30 with a main crosshead 7 is arranged at the holding mechanism body part 31.SELECTED DRAWING: Figure 4

Description

The present invention relates to a billet supply device and a billet supply method for a rear-loading extrusion press device.

When a billet (extruded material) such as a metal material such as aluminum or an alloy material thereof is extruded by a conventional extrusion press device, first, a new billet is inserted and held (upset) in the billet accommodating portion of the container. .. Specifically, the extrusion stem attached via the main crosshead is retracted in the opposite direction to the extrusion direction at the tip of the main ram that is built into the main cylinder (or the main cylinder housing) so as to be able to advance in the extrusion direction. .. The retreat of the extrusion stem is performed by a hydraulic actuator different from the main cylinder, such as a side cylinder connected to the main crosshead. Further, at this time, the container is in a state of being pressed against the die on the end platen side by the container cylinder or the like.

Next, from the billet heater arranged outside the extrusion press device, the preheated billet is conveyed to the billet supply position on the side of the extrusion press device by a billet transfer means such as a billet transfer device, and then by a billet pusher or the like. , Place it on the billet mounting part at the tip of the moving frame of the billet supply device. Then, the moving frame of the billet supply device is advanced to move the billet on the billet mounting portion onto the extrusion center. After that, the extrusion stem is advanced in the extrusion direction to insert the billet on the billet mounting portion of the billet supply device into the billet accommodating portion of the container. Subsequently, the moving frame of the billet supply device is retracted to retract the billet mounting portion from the extrusion center, and then the extrusion stem is advanced in the extrusion direction so that the outer peripheral surface of the billet becomes the inner peripheral surface of the billet accommodating portion of the container. The billet is plastically deformed so that it comes into contact, and the upset is completed. When the main ram is further advanced in the extrusion direction and the billet is pressed against the die by the extrusion stem, the extruded product is continuously extruded from the outlet portion of the die that imitates the cross-sectional shape of the product.

In such a conventional extrusion press device, in order to secure a space for supplying a billet on the extrusion center between the end face of the container and the tip of the extrusion stem, the tip of the extrusion stem is set from the end face of the container to the entire length of the billet. We need to retreat a lot. Therefore, the main ram needs a forward (backward) stroke that is longer than the total length of the billet supplied plus the length of the extrusion stem. As a result, the main ram and the main cylinder for accommodating the main ram are also lengthened, and the total length of the extrusion press device is lengthened. In addition, the amount of hydraulic oil for advancing the main ram also increases.

In recent years, a short stroke press type extrusion press device that suppresses an increase in the total length of the extrusion press device has been adopted. One of them is a rear-rotating type extrusion press device. This rear-loading type extrusion press device does not retract the extrusion stem arranged in front of the main crosshead in order to secure a space for supplying billets on the extrusion center, and is orthogonal to the extrusion direction in the front surface of the main crosshead. It is moved in a direction, for example, horizontally, and the extrusion stem is temporarily moved (retracted) from the extrusion center to suppress an increase in the total length of the extrusion press device.

The billet supply method in the rear-loading type extrusion press device will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic plan view illustrating a billet supply method in a rear-loading type extrusion press device. FIG. 2 is a view taken along the arrow A of FIG. 1 (b).

FIG. 1A shows a rear-loading type extrusion press device 20 (hereinafter, extrusion press device 20) before the billet is supplied onto the extrusion center. The end platen 1 and the cylinder mounting block 2 are connected and fixed by a tie rod 3. A die 4 is attached to the end platen 1, and a container 5 provided with a billet accommodating portion C is pressed against the die 4 by a container cylinder or the like (not shown).

A main cylinder 8 for moving (advancing / pressing) the extrusion stem 6 is attached to the cylinder mounting block 2. A main ram 8a is built in the main cylinder 8 and can be advanced by supplying hydraulic oil. On the other hand, the main crosshead 7 is attached to the tip of the main ram 8a, and the extrusion stem 6 is attached on the extrusion center on the front surface of the main crosshead 7. When the main ram 8a is advanced, the extrusion stem 6 is advanced, and the extrusion stem 6 can press the billet B in the billet accommodating portion C of the container 5 in the extrusion direction P.

When supplying the billet B to the extrusion press device 20, first, as shown in FIG. 1 (b), the extrusion stem 6 is moved to the left (upward in FIG. 1 (b)) when viewed from the end platen 1 side (upward). Evacuate). Next, the moving frame 12 of the billet supply device 10 (not shown) is moved forward from the right direction (downward / billet supply position in FIG. 1A) when viewed from the end platen 1 side toward the extrusion center side. The billet B mounted on the billet mounting portion BL at the tip of the frame 12 is moved to the extrusion center. Then, as shown in FIG. 1 (c), the end surface of the billet B on the billet mounting portion BL is pressed by the pressing member BS of the billet insertion mechanism (not shown) provided in the billet mounting portion BL. , Inserted into the billet accommodating portion C of the container 5.

After the insertion of the billet B into the billet accommodating portion C of the container 5 is completed, the moving frame 12 (not shown) of the billet supply device 10 (not shown) is retracted as shown in FIG. 1 (d). The moving frame 12 and the billet mounting portion BL are retracted from the extrusion center. After that, the extrusion stem 6 which has been moved (retracted) to the left when viewed from the end platen 1 side is moved to the extrusion center. Subsequently, the main ram 8a is advanced in the extrusion direction P to complete the upset. Since the subsequent extrusion steps are the same as those of the conventional extrusion press apparatus described above, the description thereof will be omitted.

Here, the billet supply device 10 (not shown in FIG. 1) will be outlined with reference to FIG. 2. FIG. 2 is a view taken along the arrow A of FIG. 1 (b). At the billet supply position shown in FIG. 2A, the billet supply device 10 is guided by the base 11 and the base 11 which are arranged apart from each other so that the billet B can be mounted on the billet mounting portion BL. Mainly, the base 11 is supported so as to be able to move forward and backward toward the extrusion center side, and the billet mounting portion BL and the billet insertion mechanism (not shown) are arranged at the extrusion center side end. It is a composition.

The billet supply position shown in FIG. 2A does not interfere with the movement of the main crosshead 7 in the extrusion operation or the like, and does not interfere with the extrusion press device 20 or peripheral devices such as the tie rod 3, and the new billet B Is a position that can be mounted on the billet mounting portion BL in parallel with the billet storage portion C of the container 5 by, for example, a billet pusher or the like (not shown). Further, as described above, the extrusion stem 6 is moved (retracted) to the left when viewed from the end platen 1 side along the extrusion stem guide means 6a by a driving means (not shown). Here, the horizontal distance between the billet supply position and the extrusion center of the extrusion stem 6 of the extrusion press device 20 in FIG. 2A is defined as the billet transfer distance L1.

Then, as shown in FIG. 2B, the moving frame 12 is advanced to move the billet B mounted on the billet mounting portion BL to the extrusion center. In FIG. 2, the guide and support structure of the moving frame 12 on the base 11 is a roller support structure in the vertical direction, which is easy to understand graphically, but corresponds to the weight of the billet to be supplied and the billet transport distance L1. A moving frame having rigidity and a known support structure having vertical support rigidity of the moving frame are adopted.

On the other hand, in the rear-loading type extrusion press device, there is no extrusion stem at the extrusion center when the billet is supplied. Therefore, a billet insertion mechanism for inserting the billet into the billet accommodating portion of the container by a pressing member or the like is arranged in the billet mounting portion at the tip of the moving frame of the billet supply device.

This billet insertion mechanism is driven with the moving frame advanced by the billet transport distance. Therefore, the reaction force of the insertion resistance force when the billet is inserted into the billet storage portion of the container is directed to the tip of the moving frame in the advanced state via the billet insertion mechanism in the direction opposite to the extrusion direction P (of the moving frame). It acts in the horizontal direction (horizontal direction orthogonal to the forward / backward direction). In the base of the billet supply device of the rear-loading type extrusion press device, in addition to the vertical support rigidity of the moving frame described above, the reaction force of the insertion resistance force at the time of inserting the billet corresponds to such a reaction force. There is a problem that the moving frame must have horizontal support rigidity.

In view of the above-mentioned problems, a rear loading type extrusion press device capable of supplying a billet to an extrusion center even if the billet supply device does not have a billet insertion mechanism in the billet mounting portion is disclosed.

For example, in Patent Document 1, a cylinder 16 for inserting a billet 13 supplied on the extrusion center into the cavity 12a of the container 12 separately from the press shank 17 (extrusion stem) moved from the extrusion center. A method of supplying billets by an extrusion press (device) in which an extrusion rod 16a capable of advancing / retracting in the extrusion direction by the cylinder 16 is built in an extrusion center of a main press piston 14a (main ram) is disclosed.

Further, in Patent Document 2, an extrusion press provided with a plunger 48 (extrusion stem) and a billet loader 50 (billet mounting portion) at both ends of a rotary arm 46 arranged on a movable cross member 28 (main crosshead). Is disclosed. The rotary arm 46 is configured to be rotatable around the pin 42 as a rotation axis, and the plunger 48 and the billet loader 50 can be positioned at the extrusion center by the same rotation. Then, the billet B supplied to the billet loader 50 other than the extrusion center is moved to the extrusion center by the rotation of the rotary arm 46 (at this time, the plunger 48 is outside the extrusion center), and the movable cloth member 28 is advanced or the movable cloth member 28 is advanced. The billet B at the center of extrusion is inserted into the container 16 (container) by advancing the rotary arm 46 in the cylinder incorporated in the pin 42.

Japanese Unexamined Patent Publication No. 04-231110 Japanese Unexamined Patent Publication No. 05-237539

Both the rear-loading type extrusion press devices disclosed in Patent Document 1 and Patent Document 2 include a mechanism for inserting a billet at the extrusion center into a container, not in the billet supply device but in the extrusion press device. This configuration, that is, in Patent Document 1, the cylinder 16 and the extrusion rod 16a, and in Patent Document 2, the insertion resistance force when the billet is inserted into the container by the billet loader 50 arranged at one end of the rotating arm 46. The reaction force is received by the extrusion press device itself, and the reaction force is prevented from acting on the tip of the moving frame in the advanced state in the direction opposite to the extrusion direction.

However, in the rear-loading type extrusion press device disclosed in Patent Document 1 and Patent Document 2, the configuration of the extrusion press device is such that the billet is inserted into the container in the extrusion press device instead of the billet supply device. There is the problem of complexity. In Patent Document 1, it is necessary to machine a continuous elongated hole in the extrusion center of the main press piston 14a (main ram) and incorporate the cylinder 16 and the extrusion rod 16a. In Patent Document 2, it is necessary to dispose the rotating arm 46, its rotating mechanism, and the advancing mechanism on the movable cross member 28 (main cross head).

The present invention has been made in view of the above-mentioned problems, and is a rear-loading type extrusion press capable of suppressing the reaction force of the insertion resistance force when inserting the billet into the container from acting on the billet supply device. It is an object of the present invention to provide a billet supply device and a billet supply method of the device.

The above object of the present invention is a billet gripping mechanism for gripping a billet.
A billet insertion mechanism that presses the billet with a pressing member to insert it into the container is provided.
The billet gripping mechanism has a gripping mechanism main body portion in which a fixed gripping portion is arranged, and a movable gripping portion that opens and closes facing the fixed gripping portion.
The billet insertion mechanism is arranged in the gripping mechanism main body, and at the same time,
When the billet is inserted into the container by the billet insertion mechanism, a contact portion that brings the billet gripping mechanism into contact with the main crosshead is arranged in the gripping mechanism main body portion. Achieved by the billet feeder of the rear-loading extrusion press.

Further, in the billet supply device according to the present invention, the center of the contact portion is coaxial with the central axis of the billet in a state where the billet is gripped by the billet gripping mechanism. It is preferably arranged, and it is possible to switch between a contact position in which the contact portion is projected by a predetermined amount and a non-contact position in which the contact portion is not projected by the predetermined amount with respect to the gripping mechanism main body. There may be.

Further, in the billet supply device according to the present invention, the billet insertion mechanism has a ball screw shaft whose at least one end is rotationally supported, a ball nut combined with the ball screw shaft, and a pressing member fixed to the ball nut. And have
The ball screw shaft may be arranged on the gripping mechanism main body in parallel with the central axis of the billet in a state where the billet is gripped by the billet gripping mechanism.

On the other hand, the billet supply device according to the present invention may have a form in which the billet gripping mechanism is attached to an industrial robot having a plurality of axes and is moved to an arbitrary position.

Further, the above object of the present invention is a billet supply method using a billet supply device of a rear-loading extrusion press device according to the present invention, wherein the billet gripping is performed through the contact portion of the billet gripping mechanism. This is achieved by inserting the billet into the container by the billet insertion mechanism with the mechanism and the main crosshead in contact with each other.

Further, in the billet supply method according to the present invention, the billet is inserted into the container by the billet insertion mechanism in a state where the fixed grip portion of the grip mechanism main body of the billet gripping mechanism is below the billet. It is preferable to insert it into.

The billet supply device of the rear-loading type extrusion press device according to the present invention includes a billet gripping mechanism for gripping billets and a billet gripping mechanism.
A billet insertion mechanism that presses the billet with a pressing member to insert it into the container is provided.
The billet gripping mechanism has a gripping mechanism main body portion in which a fixed gripping portion is arranged, and a movable gripping portion that opens and closes facing the fixed gripping portion.
The billet insertion mechanism is arranged in the gripping mechanism main body, and at the same time,
When the billet is inserted into the container by the billet insertion mechanism, a contact portion that brings the billet gripping mechanism into contact with the main crosshead is arranged in the gripping mechanism main body, so that the billet into the container It is possible to suppress the reaction force of the insertion resistance force at the time of insertion from acting on the billet supply device.

On the other hand, in the billet insertion method using the billet supply device of the rear loading type extrusion press device according to the present invention, the billet gripping mechanism and the main crosshead are brought into contact with each other via the contact portion of the billet gripping mechanism. In this state, the billet insertion mechanism causes the billet to be inserted into the container, so that the reaction force of the insertion resistance force at the time of inserting the billet into the container can be suppressed from acting on the billet supply device.

It is the schematic plan view explaining the billet supply method in the rear-loading type extrusion press apparatus. It is a view of arrow A of FIG. 1 (b). The billet supply device according to the first embodiment, a schematic plan view and the like for explaining the billet supply method. It is a B arrow view of FIG. It is explanatory drawing of the billet gripping mechanism shown in FIG. FIG. 5 is a view taken along the line DD of FIG. FIG. 6 is a view taken along the line EE of FIG. FIG. 6 is a view taken along the line FF of FIG. It is a G arrow view of FIG. It is explanatory drawing explaining the billet supply apparatus and the billet supply method which concerns on 2nd Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

[First Embodiment]
The billet supply device 100 according to the first embodiment and the billet supply method to the extrusion press device 20 which is a rear-loading type extrusion press device will be described with reference to FIGS. 3 and 4. FIG. 3A is a schematic plan view illustrating the billet supply device according to the first embodiment and the billet supply method, and FIG. 1 shows a billet supply method in the billet supply device of the rear-loading type extrusion press device. Corresponds to the state of (b). 3 (b) and 3 (c) are both an enlarged view of the main part X of FIG. 3 (a) and a cross-sectional view taken along the line CC of FIG. 3 (a). 4A and 4B are views taken along the arrow B of FIG. 3, in which FIG. 4A is the state of FIG. 2A (billet supply position) and FIG. 4B is the state of FIG. 2B. Corresponds to (extrusion center).

When the billet B is supplied to the extrusion press device 20, the preheated billet is transferred from the billet heater arranged outside the extrusion press device to the billet supply position on the side of the extrusion press device by a billet transfer means such as a billet transfer device. Transport. After that, at the billet supply position (FIG. 4A), the billet B is pushed out from the billet transport means (not shown) by a billet pusher or the like (not shown), and the billet B is pushed into the billet gripping mechanism 30 in the open state. After moving, the billet B is gripped. Next, the moving frame 12 of the billet supply device 100 (not shown) is advanced from the retracted limit position toward the extrusion center side, and the billet B gripped by the billet gripping mechanism 30 at the tip of the moving frame 12 is pushed into the extrusion center (FIG. 4). Move to (b)).

At this time, the billet gripping mechanism 30 is moved to the extrusion center with a predetermined clearance (predetermined amount) secured for these configurations in order to avoid interference with the container 5 and the main crosshead 7. Here, as shown in the main part X of FIG. 3A, on the central axis of the billet B at the end of the billet gripping mechanism 30 on the main crosshead 7 side (the state where the billet B is gripped by the billet gripping mechanism 30). Is provided with a contact portion 36. Further, as shown in the upper part of FIG. 3B, the clearance L2 of the contact portion 36 with respect to the main crosshead 7 is secured in a state where the billet B is moved to the extrusion center. The position of the contact portion 36 at this time is set as the non-contact position.

Next, as shown in the upper part of FIG. 3C, the contact portion 36 is projected from the billet gripping mechanism 30 by the clearance L2 and brought into contact with the main crosshead 7. The position of the contact portion 36 at this time is set as the contact position. Then, after the gripping force of the billet B by the billet gripping mechanism 30 is weakened or opened, the end face of the billet B is pressed by the pressing member BS of the billet insertion mechanism 40 (not shown) to accommodate the billet of the container 5. It is inserted into the part C. Here, as shown in FIG. 4, the billet B is inserted into the container 5 by the billet insertion mechanism 40 in a state where the fixed grip portion 32 described later is below the billet B, so that the billet by the billet gripping mechanism 30 is used. Even if the gripping force of B is weakened or opened, the billet B is held at the center of extrusion.

As described above, in the billet supply device 100 according to the first embodiment, the billet insertion mechanism 40 is in contact with the billet gripping mechanism 30 and the main crosshead 7 via the contact portion 36 of the billet gripping mechanism 30. Therefore, in order to insert the billet B into the container 5, the reaction force of the insertion resistance force at the time of inserting the billet B into the container 5 is applied to the main crosshead 7 via the contact portion 36, and the reaction force is applied. It is possible to suppress the force from acting on the billet supply device 100. As a result, the base 11 of the billet supply device 100 does not need to have the horizontal support rigidity of the moving frame 12 corresponding to such a reaction force of the insertion resistance force at the time of inserting the billet, and supports in the vertical direction. Only rigidity needs to be provided.

Further, considering the advance / retreat accuracy of the moving frame 12 of the billet supply device 100, the clearance of the contact portion 36 with respect to the main crosshead 7 in the state where the moving frame 12 is advanced and the billet B is moved to the extrusion center is 20. ~ 30 mm is sufficient. Therefore, the movement stroke of the contact portion 36 of the position switching mechanism that enables switching between the contact position in which the contact portion 36 is projected by the clearance L2 and the non-contact position in which the contact portion 36 is not projected with respect to the billet gripping mechanism 30. Should be about the same. On the other hand, the contact portion 36 receives a reaction force (acting in the direction opposite to the extrusion direction P) of the insertion resistance force when the billet is inserted into the container 5 at the contact position. In view of these, the position switching mechanism of the contact position and the non-contact position of the contact portion 36 is preferably a mechanism that does not require a large driving force to maintain the contact position of the contact portion 36.

As an example of the position switching mechanism of the contact portion 36, as shown in the cross-sectional views shown below in FIGS. 3 (b) and 3 (c), the link 36a and the link 36b are maintained in maintaining the contact position of the contact portion 36. Can be mentioned as a toggle mechanism in which is aligned on the extrusion center. The link 36a and the link 36b are switched between a linear state (contact position) and a bent state (non-contact position) on the extrusion center by advancing and retreating the cylinder rod of the actuator 36c such as an air cylinder. In order to align the link 36a and the link 36b on the extrusion center by advancing the cylinder rod of the actuator 36c, the support member of at least one of the link 36a and the link 36b is in the direction opposite to the bending state in the non-contact position. It is preferable that the guide portion 36d is formed so as to prevent bending to the rod and maintain a linear state. In the first embodiment, the guide portion 36d is formed on the support member on the contact portion 36 side of the link 36b.

In this way, a toggle mechanism is adopted for the non-contact position and the position switching mechanism of the contact position of the contact portion 36, and the contact portion 36 is in a state where the link 36a and the link 36b are aligned on the extrusion center. Since the reaction force of the insertion resistance force when inserting the billet B into the container 5 acts, the billet B into the container 5 even if the actuator 36c is an air cylinder or the like in which it is difficult to generate a large pressing force. During the insertion, the contact position of the contact portion 36 can be maintained against the reaction force.

Subsequently, the billet gripping mechanism 30 and the billet insertion mechanism 40 of the billet supply device 100 according to the first embodiment will be described with reference to FIGS. 5 to 9.

FIG. 5 is an explanatory view of the billet gripping mechanism 30 shown in FIG. This is referred to as a side view 1 of the billet gripping mechanism 30. Similarly, FIG. 6 is a view taken along the line DD of FIG. 5 (front view), and FIG. 7 is a view taken along the line EE of FIG. 6 (plan view). 8 is a view taken along the line FF of FIG. 6 (partial sectional plan view), and FIG. 9 is a view taken along the line G of FIG. 6 (side view 2). In order to illustrate the configurations of the billet gripping mechanism 30 and the billet insertion mechanism 40 in an easy-to-understand manner, in FIGS. 5 to 9, the moving frame 12 of the billet supply device 100 and the hits shown in FIGS. 3 (a) and 3 (b) are shown. The position switching mechanism of the contact portion 36 and others are not shown.

The billet gripping mechanism 30 that grips the billet B includes a gripping mechanism main body 31 in which the fixed gripping portion 32 is arranged, and a movable gripping portion 33 that opens and closes facing the fixed gripping portion 32 of the gripping mechanism main body 31. are doing. A billet insertion mechanism 40, which will be described later, is arranged in the gripping mechanism main body 31. Further, when the billet B is inserted into the container 5 by the billet insertion mechanism 40, the center of the contact portion 36 that brings the billet gripping mechanism 30 and the main crosshead 7 into contact with each other grips the billet B with the billet gripping mechanism 30. It is arranged on the gripping mechanism main body 31 so as to be coaxial with the central axis of the billet B in the state of being moved.

The gripping mechanism main body 31 has an upper rib portion 31d, a lower rib portion 31e, and a side surface portion that connect the side surface portions 31a / 31b, the back surface portion 31c, and the side surface portions 31a / 31b and are also fixed to the back surface portion 31c. It is a structure composed of a contact portion support 37 fixed to 31b and having a contact portion 36. In order to make the drawings easier to see, the gripping mechanism main body 31 is shown with reference numerals of the above-mentioned constituent members in the drawing, and the reference numerals 31 of the gripping mechanism main body 31 are omitted.

A fixed grip portion 32 having a plurality of rollers 32a is arranged above the lower rib portion 31e of the grip mechanism main body portion 31. When the fixed grip portion 32 is in the state below the billet B and the gripping state of the billet B by the movable grip portion 33 is opened, the billet B moves in the central axis direction of the billet B by the plurality of rollers 32a. Supported as possible.

The movable grip portion 33 is rotatably supported by a movable grip portion support rod 33b fixed between the side surface portions 31a / 31b, and is opened and closed facing the fixed grip portion 32 by the movable grip portion cylinder 33c. The movable grip portion cylinder 33c is rotatably supported by the back surface portion 31c on the cylinder body side and rotatably supported by the movable grip portion 33 on the cylinder rod side. Further, a grip member 33a in contact with the billet B is arranged on the billet B side of the movable grip portion 33, and the billet B on the fixed grip portion 32 is sandwiched between the grip members 33a by the opening / closing operation of the movable grip portion 33. A gripping state (closed state) and an open state in which the gripping member 33a is separated from the billet B can be selected. The longitudinal cross-sectional shape of the billet B of the gripping member 33a is preferably a shape that allows the billet B to be gripped while the central axis of the billet B is held in position. As shown in FIG. 5, the longitudinal cross-sectional shape of the billet B is an inverted V shape, and the cross-sectional shape that holds the central axis of the billet B by the concave portion in the longitudinal direction of the billet B having the same inverted V shape is also preferable. It is one of.

Next, the billet insertion mechanism 40 will be described. The billet insertion mechanism 40 is arranged in the gripping mechanism main body 31. Specifically, it has a ball screw shaft 40a having at least one end rotatably supported, a ball nut 40b combined with the ball screw shaft 40a, and a pressing member BS fixed to the ball nut 40b. Further, one end of the ball screw shaft 40a is rotationally supported by a rotary support member 40c such as a bearing arranged in the contact portion support 37. Although not shown, the end of the ball screw shaft 40a on the side surface 31a may also be rotationally supported by a rotational support member such as a bearing.

Two guide rods 40d are passed through the pressing member BS at a predetermined distance via a sliding member such as a bush (not shown), and both ends of the two guide rods 40d are side surface portions 31a /. Due to the configuration fixed between 31b, the pressing member BS is guided to move the billet B in the central axis direction in the gripping mechanism main body 31. The ball screw shaft 40a and the two guide rods 40d are arranged in parallel with the central axis of the billet B in a state where the billet B is gripped by the billet gripping mechanism 30. On the other hand, between one end of the ball screw shaft 40a, which is rotationally supported by the rotary support member 40c and protrudes from the contact support 37, and the output shaft of the servomotor 40e, which is arranged so as to protrude from the side surface portion 31b. , A rotation transmission mechanism 40f composed of a pulley, a belt, or the like is arranged, and the servomotor 40e can be driven to rotate the ball screw shaft 40a to move the pressing member BS in the direction of the central axis of the billet B. .. In order to make the drawings easier to see, the billet insertion mechanism 40 describes the reference numerals of the components mentioned above in the drawings, and the reference numerals 40 of the billet insertion mechanism 40 are omitted except for FIG.

From the state shown in FIGS. 3 (a) and 3 (b), as shown in FIG. 3 (c), the contact portion 36 is projected from the billet gripping mechanism 30 toward the main crosshead 7 by the clearance L2 to form the main. It is brought into contact with the crosshead 7 (contact position). Then, in the state shown in FIG. 4B, the movable grip portion 33 of the billet gripping mechanism 30 is moved to weaken or open the gripping force of the billet B by the movable grip portion 33. After that, when the servomotor 40e is driven to rotate the ball screw shaft 40a, the pressing member BS can be advanced toward the billet B side to press the billet B, and the billet B can be inserted into the container 5. ..

As described above, in the billet gripping mechanism 30 for gripping the billet B, the billet inserting mechanism 40 inserts the billet B into the container 5 while the fixed gripping portion 32 is below the billet B. Even if the gripping force of the billet B by the mechanism 30 (movable grip portion 33) is weakened or opened, the billet B is held at the center of extrusion.

Further, the billet B is gripped by the opening / closing operation of the movable grip portion 33 above the billet B, which faces the fixed grip portion 32. Therefore, all the configurations related to the opening / closing operation of the movable grip portion 33 (movable grip portion support rod 33b, movable grip portion cylinder 33c, etc.) are all central axes of the billet B (state in which the billet B is gripped by the billet grip mechanism 30). It can be arranged at a position away from. With this configuration, each configuration of the billet insertion mechanism 40 (pressing member BS, ball screw shaft 40a, guide rod 40d, etc.) that advances the pressing member BS on the central axis of the billet B in the same state and presses the billet B is formed. , Can be arranged in the gripping mechanism main body 31.

Further, the pressing member BS of the billet insertion mechanism 40 is driven by a combination of a ball screw mechanism (ball screw shaft 40a and ball nut 40b) and a servomotor 40e, as opposed to a configuration in which the pressing member BS is driven by a cylinder (pneumatic / hydraulic). Depending on the configuration, the forward stroke of the pressing member BS, that is, the insertion stroke of the billet B into the container 5, can be overlapped with the total length of the billet B in the direction of the central axis of the billet B. As a result, the width (length) of the billet B in the central axis direction of the billet gripping mechanism 30 in the state where the billet B is gripped by the billet gripping mechanism 30 can be suppressed, as shown in FIG. 3A. The billet gripping mechanism 30 can be inserted in a state where the billet B is gripped on the extrusion center in which the extrusion stem 6 is retracted.

On the other hand, by adopting the servomotor 40e as the driving means of the billet insertion mechanism 40, a control advantage can be enjoyed. For example, by monitoring the insertion resistance force when the billet B is inserted into the container 5 by the actual rotation torque generated in the servo motor 40e, or by monitoring the rotation speed (rotation angle) of the servo motor, the ball screw It is possible to grasp the position of the pressing member BS (billet B) with respect to the billet gripping mechanism 30 together with the specifications of the mechanism (lead, etc.). Utilizing this information for abnormality determination and identification of abnormal locations by detecting actual rotation torque above the upper limit, or for controlling the insertion speed of each position in the billet B container, the billet B can be inserted into the container 5. Stable insertion can be performed.

[Second Embodiment]
Next, the billet supply device 200 according to the second embodiment and the billet supply method to the extrusion press device 20 which is a rear-loading type extrusion press device will be described with reference to FIG. FIG. 10 is an explanatory diagram for explaining the billet supply device according to the second embodiment and the billet supply method, and corresponds to the state of FIG. 4 for explaining the billet supply method in the billet supply device 100 according to the first embodiment. ..

The billet supply device 200 according to the second embodiment is an industrial robot 210 having a plurality of axes instead of the moving frame 12 and the base 11 that supports the moving frame 12 and the base 11 for advancing and retreating the billet supply device 100 according to the first embodiment. Is adopted, and the billet gripping mechanism 30 is attached to the tip of the arm of the industrial robot 210 and is moved to an arbitrary position. The billet gripping mechanism 30 and the billet insertion mechanism 40 have the same configuration as that of the first embodiment, and the description of each configuration will be omitted.

The industrial robot 210 is a general 6-axis vertical articulated robot. It has a movable range specification and a payload specification according to the total weight of the billet gripping mechanism 30, the billet insertion mechanism 40, and the billet B attached to the tip of the arm. When the billet B is supplied to the extrusion press device 20, as shown in FIG. 10, a plurality of arms (first arm 220a, second arm 220b, third arm 220c) of the industrial robot 210 are extended from the billet supply position. The billet B gripped by the billet gripping mechanism 30 attached to the tip of the third arm 220c is moved to the extrusion center. Since the state (posture) of the industrial robot 210 at this time corresponds to the state of FIG. 4 (b) of the billet supply device 100 according to the first embodiment, (b) is added to the reference numeral to add (b) to the industrial robot 210. (B) is shown in the figure.

On the other hand, in the industrial robot 210, the support base portion that supports the first arm 220a can rotate about a vertical axis with respect to the fixed base portion of the industrial robot 210. Therefore, at the billet supply position corresponding to the state of FIG. 4 (a) of the billet supply device 100 according to the first embodiment, (a) is added to the reference numeral and the industrial robot 210 (a) is indicated in the figure. Multiple arms of the billet feeder 200, such as the state (posture). The billet gripping mechanism 30 can be lowered from above the billet B by turning to the side of the extrusion press device 20, and the billet B can be gripped from above.

The billet supply position is generally a position where the billet B is pushed out from the billet transport means (not shown) by a billet pusher or the like (not shown). Also in FIG. 10, for simplification of the figure, the central axis of the billet B at the billet supply position is shown to be parallel to the extrusion center, as in the first embodiment (FIG. 4A). .. However, in the 6-axis vertical articulated robot, not only the relative angle of each of the plurality of arms is changed within the movable range, but also the third arm 220c and the second arm 220b are axes parallel to the longitudinal direction of each arm. It can turn around. Therefore, in the state (posture) described as the industrial robot 210 (a), the billet gripping mechanism 30 can be gripped corresponding to the billet B in any direction.

Therefore, it is easy to grip the billet B as long as it is within the movable range of the industrial robot 210 described above and the billet B is arranged so that the central axis of the billet B is horizontal. Further, if there is no problem such as interference with other configurations such as the tie rod 3 in the state (posture) described as the industrial robot 210 (a) in which the billet gripping mechanism 30 is moved to the extrusion center, the extrusion press device 20 is used. There are few restrictions on the arrangement of the industrial robot 210 on the plan view.

As a result, the arrangement of the base 11 is limited according to the advance / retreat stroke of the moving frame 12, and the billet supply position is the central axis of the billet B on the billet gripping mechanism 30 when the moving frame 12 is in the retracted limit position. The billet supply device 200 (industrial robot 210) according to the second embodiment is arranged on the plan view with respect to the extrusion press device 20 with respect to the billet supply device 100 according to the first embodiment, which is limited to coaxial with. There are few restrictions.

Therefore, with respect to the arrangement of the industrial robot 210 determined according to the state (posture) described as the industrial robot 210 (a) that moves the billet gripping mechanism 30 to the extrusion center, the industrial robot 210 described above If the billet heater 230 can be arranged within the movable range, or if the position where the billet B is extruded from the billet heater 230 by a pillar pusher or the like (not shown) can be secured, the billet B extruded from the billet heater 230 is gripped by the billet gripping mechanism. It can be gripped at 30 and moved directly to the extrusion center.

As a result, when the billet B preheated by the billet heater 230 is supplied to the extrusion center, the billet transport means (not shown) from the billet heater 230 to the billet supply position becomes unnecessary, and space can be saved. In addition, the time required to supply the billet B can be shortened, and the temperature drop of the preheated billet B is suppressed.

In the gripping state of the billet B by the billet gripping mechanism 30, the fixed gripping portion 33 exerts a gripping force (reaction force of the gripping force of the movable gripping portion 33) on the billet B via a plurality of rollers 32a. However, the movable grip portion 33 exerts a gripping force on the billet B via the grip member 33a that comes into contact with the billet B in the longitudinal direction. Therefore, even if the central axis of the billet B is slightly tilted from the horizontal during the transfer of the billet B from the billet heater 230 to the extrusion center, the movable grip cylinder 33c generates a predetermined gripping force to generate the billet. The gripping state of B is maintained.

Subsequently, a method of supplying billets to the extrusion press device 20 will be described. As described above, in a state where the billet B gripped by the billet gripping mechanism 30 is moved to the extrusion center, the main cloth of the contact portion 36 is the same as in the first embodiment (FIG. 3A). It is assumed that the clearance L2 with respect to the head 7 is secured.

Also in the billet supply device 200 according to the second embodiment, the billet gripping mechanism 30 (grip mechanism main body 31) and the main crosshead 7 are brought into contact with each other via the contact portion 36 of the billet gripping mechanism 30. The billet insertion mechanism 40 causes the billet B to be inserted into the container 5.

In the billet supply device 200 according to the second embodiment, as described in the first embodiment (see FIG. 3B / FIG. 3C), the non-contact position and the contact position of the contact portion 36 The billet gripping mechanism 30 (grasping mechanism main body 31) and the main crosshead 7 may be brought into contact with each other. However, they can also be brought into contact by another method. Specifically, the billet gripping mechanism 30 is attached to the tip of the third arm 220c of the industrial robot 210 so that the central axis of the billet B gripped by the billet gripping mechanism 30 is aligned with the extrusion center. While maintaining the state, the billet gripping mechanism 30 attached to the tip of the third arm 220c may be retracted to the main crosshead 7 side by a clearance L2 to bring the contact portion 36 into contact with the main crosshead 7. ..

As described above, when the billet gripping mechanism 30 attached to the tip of the third arm 220c is retracted by the clearance L2 toward the main crosshead 7 and the contact portion 36 is brought into contact with the main crosshead 7, the first embodiment The position switching mechanism between the non-contact position and the contact position of the contact portion 36 described in (see FIG. 3B / FIG. 3C) is not an indispensable configuration. On the other hand, even if the position switching mechanism of the contact portion 36 is provided, the billet gripping mechanism 30 can be retracted by L2 to the main crosshead 7 side while maintaining the non-contact position of the contact portion 36. Therefore, the necessity of the position switching mechanism of the contact portion 36 may be appropriately determined in the situation in which the present invention is carried out in consideration of the size of the clearance L2, the cost of the position switching mechanism, and the like.

In the billet supply device 200 according to the second embodiment, the reaction force of the insertion resistance force when the billet B is inserted into the container 5 can be suppressed by bringing the contact portion 36 into contact with the main crosshead 7. An industrial robot 210 having a plurality of axes can be adopted instead of the moving frame 12 and the base 11 that supports the moving frame 12 and the billet supply device 100 according to the first embodiment so as to be able to advance and retreat. That is, since the reaction force can be suppressed from acting on the joints connecting the plurality of arms of the industrial robot 210 and the support shafts of these joints, damage to the precise joint support structure of the industrial robot 210 is prevented. can do.

Further, the billet supply device 200 (industrial robot 210) according to the second embodiment has less restrictions on the arrangement of the billet supply device 200 (industrial robot 210) according to the first embodiment on the plan view with respect to the extrusion press device 20. Further, if the billet heater 230 can be arranged within the movable range of the industrial robot 210 with respect to the arrangement of the industrial robot 210, or the billet B is pushed out from the billet heater 230 by a pillar pusher or the like (not shown). If the position can be secured, the billet transport means (not shown) from the billet heater 230 to the billet supply position becomes unnecessary when the billet B preheated by the billet heater 230 is supplied to the extrusion center, and space can be saved. In addition, the time required to supply the billet B can be shortened, and the temperature drop of the preheated billet B can be suppressed, which is a new effect.

Although the first embodiment and the second embodiment have been described above with respect to the embodiment for carrying out the invention, the present invention is not limited to the above-described embodiment and is described in the scope of claims. It can be implemented in various ways within the range that does not deviate from.

For example, in the first embodiment, a toggle mechanism is given as an example as a position switching mechanism that does not require a large driving force to maintain the contact position of the contact portion 36. On the other hand, although not shown, if the mechanism is such that a pinion gear is combined with a rack gear arranged in a moving direction between the contact position and the non-contact position of the contact portion 36, and the pinion gear is rotated by the worm gear. , The reaction force of the insertion resistance force when the billet B is inserted into the container 5 is received by the rotation support portion of the pinion gear, and the reaction force is suppressed from acting on the output shaft of the rotation drive means for rotating the worm gear. it can.

Further, it has been described that in the second embodiment, the billet B extruded from the billet heater 230 can be directly moved to the extrusion center. On the other hand, even if the billet heater 230 cannot be arranged within the movable range of the industrial robot 210, or the position where the billet B is pushed out from the billet heater 230 by a pillar pusher or the like (not shown) cannot be secured. It suffices if the billet supply position can be secured within the movable range of the industrial robot 210.

That is, even if there is a restriction that the billet heater must be arranged outside the movable range of the industrial robot 210, the billet transport means for transporting the billet between the billet supply positions within the movable range from the billet heater. By shortening the transport distance as much as possible, the space saving of the configuration related to billet supply, the shortening of the time required for billet supply, or the suppression of the temperature drop of the preheated billet due to this can be achieved. Obtainable. Further, even in this case, if the central axis of the billet at the billet supply position secured within the movable range is basically horizontal, there is no restriction, and the central axis of the billet is supplied to the billet supply position in a state different from the extrusion center. Even so, since the billet gripping mechanism 30 can easily grip the billet from above, there are few restrictions on the arrangement of the billet heater, the billet pusher, and the billet transporting means on the plan view.

On the other hand, some industrial robots can not only recognize the size of the end effector (billet gripping mechanism 30 in the present application) attached to the tip of the arm and the posture during operation in the control device, but also utilize this function. There are also commercially available products having a function of movably supporting the end effector at a preselected position only in a preselected direction without resisting an external force.

Therefore, in the industrial robot 210 constituting the billet supply device 200 of the second embodiment, the billet gripping mechanism 30 (grip mechanism main body 31) and the main crosshead are previously interposed via the contact portion 36 of the billet gripping mechanism 30. The position where the 7 is brought into contact is selected, and the extrusion center direction is selected as the moving direction for movably supporting the 7 without resisting an external force to utilize the above function. As a result, even if a slight gap is generated between the abutting portion 36 and the main crosshead 7 due to the vibration of the extrusion press device 20 or the vibration of the base portion to which the industrial robot 210 is fixed, the inside of the container 5 can be moved. Due to the reaction force of the insertion resistance force when the billet B is inserted, the billet gripping mechanism 30 is prevented from rotating around the center of extrusion, and the contact portion 36 of the billet gripping mechanism 30 is the main in a state where the load in the vertical direction is supported. Retreat until it comes into contact with the crosshead 7. Not only that, the reaction force continues to maintain the state in which the contact portion 36 is pressed against the main crosshead 7. As a matter of course, in this state, the reaction force does not act on the joints connecting the plurality of arms of the industrial robot 210 and the support shafts of these joints, and the billet B is stably stored in the billet storage portion C of the container 5. Can be inserted into.

5 container, 6 extrusion stem, 6a extrusion stem guide means, 7 main cross head, 10 billet supply device, 11 base, 12 moving frame, 20 rear loading type extrusion press device (extrusion press device), 30 billet gripping mechanism, 31 Gripping mechanism main body, 31a / 31b side surface, 31c back surface, 31d upper rib part, 31e lower rib part, 32 fixed grip part, 32a roller, 33 movable grip part, 33a grip member, 33b movable grip part support rod, 33c Movable grip cylinder, 36 contact part, 36a / 36b link, 36c actuator, 36d guide part, 37 contact part support, 40 billet insertion mechanism, 40a ball screw shaft, 40b ball nut, 40c rotary support member, 40d guide Rod, 40e servo motor, 40f rotation transmission mechanism, 100 billet feeder, 200 billet feeder, 210 industrial robot, 220a 1st arm, 220b 2nd arm, 220c 3rd arm, 230 billet heater,
B billet, C billet storage part, P extrusion direction, L1 billet transport distance, L2 clearance, BL billet mounting part, BS pressing member

Claims (7)

A billet feeder for a rear-loading extrusion press
A billet gripping mechanism that grips the billet,
A billet insertion mechanism that presses the billet with a pressing member to insert it into the container is provided.
The billet gripping mechanism has a gripping mechanism main body portion in which a fixed gripping portion is arranged, and a movable gripping portion that opens and closes facing the fixed gripping portion.
The billet insertion mechanism is arranged in the gripping mechanism main body, and at the same time,
When the billet is inserted into the container by the billet insertion mechanism, a contact portion that brings the billet gripping mechanism into contact with the main crosshead is arranged in the gripping mechanism main body portion. Billet feeder for rear-loading extrusion press equipment. The claim is characterized in that the center of the contact portion is arranged on the gripping mechanism main body portion so as to be coaxial with the central axis of the billet in a state where the billet is gripped by the billet gripping mechanism. The billet supply device for a rear-loading extrusion press device according to 1. It is characterized in that it can be switched between a contact position in which the contact portion is projected by a predetermined amount and a non-contact position in which the contact portion is not projected by the predetermined amount with respect to the gripping mechanism main body portion. The billet supply device for a rear-loading extrusion press device according to claim 1 or 2. The billet insertion mechanism has a ball screw shaft whose at least one end is rotationally supported, a ball nut combined with the ball screw shaft, and the pressing member fixed to the ball nut.
Claims 1 to 3 are characterized in that the ball screw shaft is arranged on the gripping mechanism main body in parallel with the central axis of the billet in a state where the billet is gripped by the billet gripping mechanism. The billet supply device for the rear-loading type extrusion press device according to any one of the above items. The rear-loading extrusion according to any one of claims 1 to 4, wherein the billet gripping mechanism is attached to an industrial robot having a plurality of axes and moved to an arbitrary position. Billet feeder for press equipment. The billet is inserted into the container by the billet insertion mechanism in a state where the billet gripping mechanism and the main crosshead are in contact with each other through the contact portion of the billet gripping mechanism. The billet supply method by the billet supply device of the rear-loading type extrusion press device according to any one of claims 1 to 5. A claim, wherein the billet is inserted into the container by the billet insertion mechanism in a state where the fixed grip portion of the grip mechanism main body portion of the billet gripping mechanism is below the billet. The billet supply method according to 6.

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