Shoot structure

Abstract

To provide a chute structure capable of stabilizing the attitude of a billet discharged from the chute.SOLUTION: A chute structure 100 according to the present disclosure comprises: a chute 10 for conveying a billet 20; and an end block 30 that receives the billet 20 discharged from the chute 10. The end block 30 has a taper T provided on a lower side on the surface of a side in contact with the billet 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a chute structure.

Background Art

[0002] In the production of forged products, it is known to use billets cut to a predetermined length. The billets can be obtained by cutting a round bar produced in a rolling process with a cutting machine at a predetermined length. The cut billets can be automatically conveyed using a conveyor or a chute.

[0003] As a related technique, Patent Document 1 discloses a billet supply device that continuously conveys billets cut from a cutting machine to a heater with a high pass line. In this supply device, a long steel material is cut by a cutting machine to form billets, which are fed into a chain conveyor through a billet receiver and a chute. The billets are conveyed upward with the assistance of the thrust of an electromagnetic induction linear motor and discharged from the chute of the chain conveyor. The discharged billets are controlled to a predetermined speed by a billet conveying device and sent to a heater, where they are heated to a predetermined temperature by the heater and its power supply device and then discharged.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the billet supply device disclosed in Patent Document 1, when a billet is discharged and falls, a force is generated in the direction in which the billet rises due to the impact rebound. Therefore, the posture of the discharged billet is not stable.

[0006] The present disclosure has been made to solve such problems, and an object thereof is to provide a chute structure capable of stabilizing the posture of a bullet discharged from a chute.

Means for Solving the Problems

[0007] The chute structure according to the present disclosure includes a chute for conveying a bullet, and an end block for receiving the bullet discharged from the chute. On the surface of the end block that contacts the bullet, a taper is provided on the lower side.

Effects of the Invention

[0008] According to the present disclosure, the posture of the bullet discharged from the chute can be stabilized.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals. For the sake of clarity of explanation, redundant explanations are omitted as necessary.

[0011] First, the shoot structure 100 according to this embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view of the shoot structure 100 according to this embodiment. For the sake of explanation, the illustration of the taper T described later is omitted in FIG. 1. Also, FIG. 1 is the same as the perspective view of the shoot structure 101 according to the related art. The shoot structure 101 will be described later.

[0012] The shoot structure 100 includes a shoot 10 and an end block 30 provided below the shoot 10. The shoot structure 100 is provided, for example, as a part of a conveying device that conveys a billet 20 in a forging press facility. The shoot structure 100 receives the billet 20 conveyed upward, for example, by a chain conveyor or the like, and conveys the received billet 20 downward using the shoot 10.

[0013] The shoot structure 100 is provided so as to be inclined with respect to the horizontal plane. The horizontal plane is, for example, a plane parallel to the floor surface of a factory where a forging press facility is installed. The shoot 10, the end block 30, and the mounting base 40 are provided inclined at a predetermined angle (for example, 40°) with respect to the horizontal plane.

[0014] The right-handed xyz coordinates shown in FIG. 1 are for convenience in explaining the positional relationship of the components and are common among the drawings. In FIG. 1, the z-axis direction indicates the direction parallel to the billet axis 22 of the billet 20. The billet axis 22 will be described later.

[0015] The xy plane is a plane parallel to the end block main surface 31, which is the end surface on the shoot 10 side of the end block 30. Here, it is assumed that the end block 30 has a rectangular parallelepiped shape as shown in FIG. 1. The x-axis direction indicates the short side direction of the end block 30, and the y-axis direction indicates the long side direction of the end block 30.

[0016] The billet 20 can be obtained by cutting a bar-shaped material manufactured in a rolling process into a predetermined length using a cutting machine (not shown). The billet 20 is formed, for example, in a cylindrical shape or a prismatic shape. In the present embodiment, the cylindrical billet 20 will be described.

[0017] The billet 20 moves inside the chute 10 from the positive z-axis side to the negative direction side. In FIG. 1, the direction in which the billet 20 moves is indicated by a solid arrow. The billet 20 is conveyed by the chute 10 with the billet axis 22 as the conveying direction. The billet axis 22 is a straight line orthogonal to the end face of the billet 20 and passing through the billet center 25. The billet center 25 is the center point of the billet 20. The billet center 25 may coincide with the centroid position of the billet 20.

[0018] When the billet 20 is conveyed from the previous process and enters the chute 10, it moves in the negative z-axis direction and slides down inside the chute 10 due to its own weight. After the billet 20 is discharged from the end of the chute 10, it is received by an end block 30 provided below the chute 10. The billet 20 is further conveyed from the end block 30 and moves to the next process.

[0019] Assume that the billet 20 is discharged from the chute 10 and the main surface 31 of the end block is in contact with the lower end face of the billet 20. In this state, the end face of the billet 20 is parallel to the main surface 31 of the end block. Also, in this state, the billet axis 22 is orthogonal to the main surface 31 of the end block. In the present embodiment, it is assumed that the perpendicularity between the billet axis 22 and the main surface 31 of the end block is managed to be a predetermined value. The perpendicularity is, for example, 0.5° or less.

[0020] The chute 10 is a hollow member that conveys the bullet 20 from above to below by passing the bullet 20 through its interior. The chute 10 is provided, for example, to connect a chain conveyor (not shown) and the end block 30 shown in FIG. 1. The chute 10 receives the bullet 20 conveyed by the chain conveyor at one end on the chain conveyor side and allows the bullet 20 to enter the chute 10. The chute 10 causes the bullet 20 to slide down inside the chute 10 by the weight of the bullet 20 and discharges the bullet 20 from the other end side.

[0021] The end block 30 receives the bullet 20 discharged from the chute 10. The end block 30 may be, for example, a metal member having a rectangular parallelepiped shape or the like. However, the end block 30 is not limited thereto, and various members capable of receiving the bullet 20 discharged from the chute 10 may be used. The end block 30 is fixed to the mounting base 40 by a fixing member such as a bolt. A conveying device (not shown) may be connected to the end block 30. The bullet 20 is conveyed from the end block 30 to the next process by the conveying device.

[0022] Here, with reference to FIG. 3, the problem to be solved by the present disclosure will be described. FIG. 3 is a cross-sectional view of a chute structure 101 in related art. The perspective view of the chute structure 101 is the same as the perspective view of the chute structure 100 shown in FIG. 1. FIG. 3 is a view of the chute structure 101 shown in FIG. 1 as seen in the positive y-axis direction.

[0023] The chute 10 is provided so as to be inclined at a predetermined angle θ1 with respect to the horizontal plane H. The horizontal plane H is a plane parallel to the floor surface of a factory or the like as described above. The predetermined angle θ1 is, for example, 40°. The bullet 20 moves while sliding inside the chute 10 while being in contact with the chute inner wall 11.

[0024] When the billet 20 falls from the chute 10, the end face of the billet 20 contacts the end block main surface 31. Hereinafter, the contact position between the end face of the billet 20 and the end block main surface 31 will be described as the contact portion 28. The contact portion 28 can vary according to the falling state of the billet 20. For example, when the billet 20 falls such that the billet axis 22 and the end block main surface 31 are perpendicular, the contact portion 28 is a region including the intersection point P of the billet axis 22 and the end block main surface 31.

[0025] On the other hand, when the billet 20 falls with the billet axis 22 inclined with respect to the end block main surface 31, the contact portion 28 can be at a position away from the intersection point P. For example, as shown in FIG. 3, the contact portion 28 can be at a position below the billet center 25. Here, "below the billet center 25" indicates that the contact portion 28 is below the intersection point P. In such a case, in FIG. 3, the contact portion 28 is included in the solid line portion shown on the negative x-axis side from the intersection point P.

[0026] Thus, when the billet 20 and the end block main surface 31 contact below the billet center 25, a repulsive force F1 is generated in the billet 20 due to the impact of the fall, as indicated by the dashed arrow in the figure. In this case, a rising force F2 acts on the billet 20, as indicated by the white arrow in the figure. The force F2 is a force directed in the direction opposite to the floor surface (the positive x-axis side). When the rising force F2 acts on the billet 20, the posture of the billet 20 becomes unstable. Therefore, there is a possibility of affecting the conveyance of the billet 20 after it has fallen onto the end block 30.

[0027] In the conveyance of the billet 20 using the chute 10, the above-described problems occur with a certain probability. The present disclosure aims to solve such problems.

[0028] Next, the shoot structure 100 according to this embodiment will be described with reference to FIG. 2. FIG. 2 is a cross-sectional view of the shoot structure 100 according to this embodiment. FIG. 2 is a view of the shoot structure 100 shown in FIG. 1 as seen in the positive y-axis direction. Since the configurations of the shoot 10, the billet 20, and the mounting base 40 are the same as those of the shoot structure 101 described with reference to FIG. 3, the description of overlapping content will be omitted as appropriate.

[0029] As shown in FIG. 2, in the shoot structure 100, the end block 30 has a taper T on the lower side of the end block main surface 31 on the side in contact with the billet 20. The taper T indicates a state in which the end block main surface 31 is formed to be inclined downward.

[0030] The taper T is provided such that the contact portion 28 is above the billet center 25. Here, "above the billet center 25" means that the contact portion 28 is above the intersection point P. In such a case, in FIG. 2, the contact portion 28 is included in the solid line portion shown on the positive x-axis side from the intersection point P.

[0031] Hereinafter, among the end block main surfaces 31, the tapered portion will be referred to as the tapered surface 31T, and the portion other than the tapered surface 31T will be referred to as the end block main surface 31a for description. Assume that the billet 20 is discharged from the shoot 10 and the end block main surface 31a is in contact with the lower end surface of the billet 20. In this state, the end block main surface 31a is parallel to the lower end surface of the billet 20. Also, in this state, the end block main surface 31a is orthogonal to the billet axis 22.

[0032] The tapered surface 31T is provided to be inclined with respect to the end block main surface 31a such that a gap is formed between the billet 20 and the end block 30 in a state where the billet axis 22 and the end block main surface 31a are in contact perpendicularly.

[0033] For example, as shown in FIG. 2, the taper T is provided such that the angle formed between the end face of the billet 20 and the taper surface 31T is a predetermined angle θ2. The end face of the billet 20 is a plane perpendicular to the billet axis 22, similar to the example in FIG. 3. The angle θ2 is an angle greater than or equal to the perpendicularity of the billet 20. As described above, in this embodiment, since the perpendicularity of the billet 20 is controlled to be 0.5° or less, the angle θ2 may be any angle greater than 0.5°. The angle θ2 is, for example, 5°.

[0034] When the billet 20 is discharged from the chute 10, a repulsive force F11 is generated on the billet 20 due to the impact of falling, as indicated by the dashed arrow in FIG. 2, similar to the force F1 shown in FIG. 3. However, in this embodiment, by providing the taper T, a gap of angle θ2 is formed between the end face of the billet 20 and the taper surface 31T. As a result, in a state where the billet 20 and the end block 30 are in contact such that the billet axis 22 and the main surface 31a of the end block are perpendicular, the taper surface 31T does not contact the end face of the billet 20. Therefore, the contact portion 28 is located above the billet center 25.

[0035] Then, a force F12 that presses against the inner wall 11 of the chute acts on the billet 20, as indicated by the white arrow in the figure. The force F12 is a force directed toward the floor side (negative x-axis direction). With such a configuration, generation of the force F2 that causes the billet 20 to rise from the chute 10, which was described with reference to FIG. 3, can be suppressed. As a result, the posture of the billet 20 becomes stable.

[0036] Note that the configuration of the taper T shown in FIG. 2 is merely an example and is not limited to such a configuration. For example, in FIG. 2, the taper surface 31T is provided to incline downward starting from the intersection point P, but it is not limited to this. The taper surface 31T may be provided to incline starting from above the intersection point P (positive x-axis direction side).

[0037] As described above, in the shoot structure 100 according to this embodiment, in the end block 30 that receives the bullet 20 discharged from the shoot 10, a taper T is provided on the lower side of the end block main surface 31. The taper T is provided such that the angle formed by the end surface of the bullet 20 and the taper surface 31T is a predetermined angle. The predetermined angle is an angle (for example, 5°) that is equal to or greater than the perpendicularity (for example, 0.5°) between the bullet axis 22 and the end block main surface 31.

[0038] With such a configuration, it is possible to avoid contact between the bullet 20 and the end block 30 below the bullet center 25. Thereby, it is possible to prevent a force that causes the bullet 20 to rise from the shoot 10 from being generated on the bullet 20. Further, since the bullet 20 and the end block 30 come into contact above the bullet center 25, when the bullet 20 and the end block 30 come into contact, a force that presses the bullet 20 against the shoot inner wall 11 acts.

[0039] Therefore, according to the shoot structure 100 according to this embodiment, the posture of the bullet 20 when discharged from the shoot 10 can be stabilized. Thereby, the bullet 20 can be automatically transported stably.

[0040] Note that the present disclosure is not limited to the above embodiment, and can be appropriately changed without departing from the gist.

Explanation of Signs

[0041] 10 Shoot 11 Shoot Inner Wall 20 Bullet 22 Bullet Axis 25 Bullet Center 28 Contact Portion 30 End Block 31, 31a End Block Main Surface 31T Taper Surface 40 Mounting Base 100, 101 Shoot Structure H Horizontal Plane P intersection point T taper

Claims

1. A chute for conveying billets, and an end block for receiving the billets discharged from the chute, wherein the end block is provided with a taper on the lower side on the main surface of the end block on the side in contact with the billet, the tapered surface of the taper is in contact with the billet axis passing through the center of the billet perpendicular to the end face of the billet and the portion of the main surface of the end block other than the tapered surface in a state where they are perpendicular, and is provided so as to be inclined with respect to the portion other than the tapered surface so that a gap is formed between the billet and the end block, the taper is provided such that the angle formed by the end face of the billet and the tapered surface is a predetermined angle Shoot structure.

2. The predetermined angle is an angle greater than or equal to the perpendicularity between the billet axis and the main surface of the end block The chute structure according to claim 1.

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