JPS63101692A - Method of carrying round bar-shaped treating material in walking beam furnace - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a method for transporting treated materials when heat treating round bars of aluminum and aluminum alloy, for example, in a walking beam type heating furnace.

(Prior art) In a walking beam type furnace, the movement of the moving beam lifts the processing material on the fixed beam on the way up,
It then moves forward while still being lifted, then descends, transferring the material to be processed onto the fixed beam on the way down, and when the transfer is complete, it retreats and returns to its original position, preparing to transfer the next material to be processed. Do exercise.

Now, in the moving beam that makes such a movement, the lifting and lowering movement is achieved by connecting a hydraulic cylinder to the lifting roller on which the moving beam is placed, and moving the lifting roller placed on the sloped surface of the stem forward and backward. Depending on the situation, a lifting roller was installed on one side of the bell crank, and the other side was connected to a hydraulic cylinder to raise and lower the bell crank. Now, by carrying out such a movement, the material to be treated is conveyed one by one (in a walking beam type furnace, if the material to be treated is a round material, semicircular receiving portions are placed at regular intervals on the fixed beam and the moving beam). are respectively recessed, and the feeding distance of the moving beam is made larger (or smaller) than the interval between the processing material receiving parts, and the processing material is sequentially transferred forward by the movement of the moving beam as mentioned above. The processing material is transferred to the inclined part of the processing material receiving section recessed in the fixed beam, and then the processing material is moved inside the furnace so that it rolls to the bottom of the processing material receiving section of the fixed beam. It was designed with a beam transport length of .

[Problem to be solved by the invention]

However, if the treated material is rotated and moved along the entire length of the beam, in the case of aluminum and aluminum alloys, when the temperature of the treated material reaches a predetermined temperature or higher, the treated material and the fixed beam will be separated when the treated material rolls. Damage may occur to the treated material, which has softened due to increased temperature at the contact surface.

[Means to solve the problem]

In the present invention, walking is carried out by lifting a round bar-shaped processing material placed on a fixed beam and moving forward, then descending to transfer the processing material onto the fixed beam, and then retreating and returning to the starting point. In a beam furnace, the inside of the furnace is divided into two parts, the front and back, at the position where the material to be treated reaches a predetermined temperature (of course, the temperature inside the furnace is almost uniform over the entire length), and the temperature at which the material to be treated reaches the predetermined temperature. Up to this point, when transferring the processed material (5) between the low-temperature side moving beam (2) and the low-temperature side fixed beam (1), the processed material (5) was transferred so as to roll, and the processed material (5) A technical method is adopted in which when the processing material (5) is transferred between the high-temperature side moving beam (4) and the high-temperature side fixed beam (3) when the temperature rises above a predetermined temperature, the material is transferred so as not to rotate. There is.

[For production]

Therefore, in a range where the round bar-shaped processing material (5) has not risen to a predetermined temperature, the conveyance amount of the low-temperature side moving beam (2) is Due to the discrepancy with the spacing between the receiving parts (6), when the processed material (5) is transferred between the low-temperature side fixed beam (1) and the low-temperature side moving beam (2), the slope of the processed material receiving part (6) Treated material (5
) is transferred, and as a result, when the low-temperature side moving beam (2) separates from the low-temperature side fixed beam (1), the processing material (5) rolls and falls to the bottom of the processing material receiving part (6). Become.

Subsequently, when the processing material (5) reaches a range where the temperature is uniformly raised to a predetermined temperature or higher, the high temperature side moving beam (4)
conveyance amount and the processing material receiving part (6) of the high temperature side fixed beam (3).
) have the same pitch, and as a result, the material to be processed is transported without rotation so that the surface of the material is not damaged.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As mentioned above, the walking beam method used in the furnace consists of the processing material (5) placed on the fixed beams (1) and (3).
(Round bar material in this example) is lifted by the moving beams (2) and (4), moved forward and transferred onto the fixed table (l) (3), which is repeated to transport the processed material (5). It is a device that does There are various types of elevating mechanisms, such as a model type, a bell crank type, and an eccentric cam type, and there are also types using hydraulic cylinders and other types for advancing and retracting. Each of these methods is well known and will not be described in detail. Fixed beams (1) (3)
) and the moving beams (2) and (4) are shown in the figure.

1 to 4 are side views showing how the fixed beams (1) (3) and the moving beams (2) (4) interact with each other. As mentioned above, the temperature inside the walking beam furnace is set to be the same throughout the furnace, but for convenience, these will be referred to as the low temperature side and the high temperature side depending on the temperature rise state of the treated material.

It is assumed that (1') is a fixed beam on the low temperature side, (3) is a fixed beam on the high temperature side, (2) is a moving beam on the low temperature side, and (4) is a moving beam on the high temperature side. The point X between the fixed beam on the low temperature side (1) and the fixed beam on the high temperature side (3) is at a predetermined temperature (
250°C to 300°C). Low temperature side and hot side fixed beams (1) (3) and moving beams (2) (4)
), semicircular processing material receiving portions (6) are recessed at regular intervals. The treated material (5) is, of course, not limited to this, but for example, a round bar material of aluminum or aluminum alloy is used.

Therefore, the low temperature side and high temperature side moving beams (2) (4)
The processing material (5) is advanced one pitch at a time by raising, advancing, lowering, and retreating, but the moving distance (Sl) of each of the moving beams (2) and (4) is )
(S2) are different from each other. That is, the dividing point of the low-temperature side and high-temperature side moving beams (2) and (4) corresponding to the X point between the low-temperature side fixed beam (1) and the high-temperature side fixed beam (3) is defined as Y, and each beam (1) If the interval between the processing material receiving parts (6) in (2), (3), and (4) is (D), the moving distance (Sl) of the low-temperature side moving beam (2) in front of the Y point is (Sl).
) < (D) (or Sl>D In this case, the ends of the moving beams (2) and (4) overlap at the Y point.), and the movement of the high temperature side moving beam (4) behind the Y point. The distance (S2) is (S2) = (D), and the one stroke time of the low-temperature side and high-temperature side moving beams (2) and (4) is the same.

In Figure 1, the moving beams (2), (4) on the low temperature side and the high temperature side are shown.
) are located directly below the fixed beams (1) and (3) on the low temperature side and high temperature side, respectively, and the processing material receiving section (6) is also located directly below the fixed beams (1) and (3) and the moving beam (2). Although the heights are different from the position (4), they are in the same position. The state shown in FIG. 1 is taken as the starting point of one stroke. FIG. 2 shows a state in which the moving beams (2) and (4) have risen and lifted the processing material (5) from the fixed beams (1 and 3). Next, the treated material (
5) While holding up, move one pitch to the right in the diagram.
As shown in FIG. 3, the fixed beams (1) and (3) are moved by one frame of the processing material receiving portions (6). However, the low temperature side moving beam (2) up to Y moves by (Sl), and moves by (A) less than the pitch (D) of the processing material receiving part (6). On the other hand, the high temperature side moving beam (4) has a processing material receiving part (
6) moves by (s2) equal to the pitch (D). Figure 4 shows the moving beam (2) (4) from the state in Figure 3.
shows a state where it has fallen. Low temperature side moving beam (2)
When the beam descends, the processing material (5) on the low temperature side moving beam (2)
) contacts the fixed beam (1) on the low temperature side and the moving beam (2) on the low temperature side at point (a) of the fixed beam (1) on the low temperature side, respectively, and when the moving beam (2) on the low temperature side descends, the eccentricity amount(
The treated material rolls clockwise in the figure by A) and is settled in the arcuate bottom (b) of the fixed beam (1) on the low temperature side (Sl>D
In the case of , on the contrary, the treated material (5) rolls counterclockwise and finally settles at the bottom point (b) of the arc. ) On the other hand, the processing material (5) on the high temperature side moving beam (4) is transferred to the processing material receiving part (
6) are equal in pitch and there is no eccentricity like on the low temperature side, so the processing material (5) is transferred without rotation. After completing the descent, the re-moving beams (2) and (4) move leftward in the drawing from the position shown in FIG. 4 and return to the state shown in FIG. 1, completing one stroke. On the low-temperature side, repeat the above-mentioned operations to advance the treated material (5) one pitch at a time to a predetermined temperature increase position X, and after X (that is, after moving to the high-temperature side) It is transferred by rotation.

〔effect〕

As described above, when heating a round bar-shaped material, the material is transferred between a moving beam and a fixed beam until the temperature of the material to be processed reaches a predetermined temperature. For example, when a round bar of aluminum or aluminum alloy is heat-treated in a walking beam heating furnace, the entire material to be treated can be heated to a uniform temperature, and then the material to be treated can be heated to a uniform temperature. When the temperature rises to a predetermined temperature or above, the material to be treated is transferred between the moving beam and the fixed beam so that it does not rotate, so the heat treatment is performed without rotation, and the material is heated to a high temperature and softened. This method has the advantage that it does not cause damage to the surface of the treated material, and as a result, it is possible to carry out efficient heat treatment that suits the working conditions.

[Brief explanation of the drawing]

1 to 4 are side views illustrating the operation of the fixed beam and moving beam on the low temperature side and high temperature side in the present invention. (1)...Low temperature side fixed beam, (2)...Low temperature side moving beam, (3)...High temperature side fixed beam, (4)...High temperature side moving beam, (5)... Processing material (6) Processing material receiving part.

Claims (2)

[Claims] (1) Move the round bar-shaped processing material placed on the fixed beam forward, then descend to transfer the processing material onto the fixed beam, and then move backwards to return to the starting point. When heating a round bar-shaped material in a walking beam furnace, the material rolls when the material is transferred between the moving beam and the fixed beam until the temperature of the material reaches a predetermined temperature. Processing of round bars in a walking beam furnace, characterized in that the processing material is transferred so that it does not rotate when it is transferred between a moving beam and a fixed beam when the processing material reaches a predetermined temperature or higher. How to transport materials. (2) Approximately semicircular processing material receivers are recessed at regular intervals on the upper surfaces of the fixed beam and the moving beam, and when the processing material does not reach a predetermined temperature, the conveyance amount of the moving beam is reduced to the fixed beam. The distance between the processing material receiving sections of the fixed beam is made to match the distance between the processing material receiving sections of the fixed beam, and the conveyance amount of the moving beam and the processing material receiving section of the fixed beam are made to match in the section where the processing material reaches a predetermined temperature or higher. A method for transporting a round bar-shaped processed material in a walking beam furnace according to scope 1.