JPH0499221A - Annealing apparatus - Google Patents

Abstract

PURPOSE:To prevent looseness of a wire rod caused by heat expansion, to detect accurate temp. of the wire rod and to execute the suitable annealing by shifting a clamp member to the direction stretching the above wire rod by the distance corresponding to the extension of the wire rods at the time of conducting electric current, and detecting the temp. of wire rod. CONSTITUTION:The wire rod is held under condition of bridging with a fixing side clamp member 2 and a shifting side clamp member 3. Then, at the time of turning on a main switch in an annealing apparatus, the wire rod S generates heat by conducting the current and expands with heat expansion. As the shifting side clamp member 3 is energized with springs 8, 8 in the direction stretching the wire rod S, this is shifted to the direction stretching the wire rod S by the distance corresponding to the extension of the wire rod S. Therefore, the looseness of wire rod S is not developed and the wire rod S is always kept to the straight condition. Then, an infrared sensor 32 set apart from the wire rod S at the prescribed distance detects the infrared ray generated from the wire rod S to detect the temp. of the wire rod S. On the basis of this detected value, current conducting control means 31 controls the current into the wire rod S so as to anneal the wire rod S in the most suitable condition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an annealing apparatus for annealing welded wire rods made of high carbon steel or the like.

(Conventional technology) After welding wire rods made of high carbon steel, etc., weld them for the purpose of removing internal strain, refining crystal grains, and increasing ductility.
Annealing is performed.

This type of annealing apparatus is equipped with a pair of clamp members, which hold the wire in tension. Further, the annealing device is provided with a current supply means, which supplies current to the wire held by the clamp member to generate heat in the wire to perform annealing.

In order to perform appropriate annealing, it is necessary to detect the temperature of the wire and adjust the energization to the wire based on this detected value. Therefore, an infrared sensor or the like is placed near the wire held by the clamp member to detect the temperature of the wire from the infrared rays emitted from the wire, and based on this detected value, the energizing means is controlled to adjust the energization to the wire. It is possible that

C Problems to be Solved by the Invention] However, even if the wire is held in a tensioned state by the clamp member in 1lliE@, when electricity is applied, the wire expands and loosens due to thermal expansion.Therefore, the wire does not reach the detection position of the infrared sensor. The distance between the wire and the infrared sensor cannot be maintained constant. Therefore, there is a problem in that the temperature cannot be accurately detected and appropriate annealing cannot be performed.

The present invention has been made in view of the above-mentioned conventional problems, and provides an annealing device that can prevent wire rods from loosening due to thermal expansion, enable accurate temperature detection of wire rods, and perform appropriate annealing. The purpose is to

[Means to solve the problem]

The present invention provides an annealing apparatus having a pair of clamp members that hold the wire in a bridged state, and an energizing means for annealing the wire by energization heating, in which the wire is stretched in the direction in which the wire is stretched by the distance that the wire extends when energized. Clamp member moving means for moving the clamp member; temperature detection means for detecting the temperature of the wire and arranged at a distance from the wire; and energization control for controlling the energization means based on the detected value of the temperature detection means. and means.

[Action of the invention]

According to the annealing apparatus of the present invention, the wire to be annealed is held by the clamp member, and electricity is applied to the wire to generate heat. At this time, even if the wire rod expands thermally and becomes slack, the clamp member moves in the direction of pulling the wire rod, and the wire rod is stretched and maintained in a straight state. The temperature of the wire is detected by the temperature detection means, and the energization control means controls the energization means based on the detected value to adjust the energization to the wire and perform appropriate annealing.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

A fixed side support plate 6 and a movable side support plate 7 are fixedly installed on the annealing equipment base 1, and a fixed side clamp member 2 and a movable side clamp member are disposed between the fixed side support plate 6 and the movable side support plate 7. 3 and a bearing plate 3a are movably arranged. Further, the stationary clamp member 2 is slidably supported on the shaft 5.5.

The movable clamping member 3 is slidably supported on the shaft 5.5 and is connected to the bearing plate 3a by a connecting spring 8.8. The connecting spring 8.8 biases the movable clamp member 3 toward the bearing plate 3a by its elastic force. In other words, the connecting spring 8.8 constitutes a clamp member moving means.

A lock cam 9 is provided on the bearing plate 3a, and this lock cam 9 contacts the circumferential surface of the movable clamp member 3 to restrict movement of the movable clamp member 3 toward the bearing plate 3a. The lock cam 9 can be rotated approximately 90 degrees clockwise from the state shown in FIG. 4 by a mechanism not shown.
It is possible to rotate approximately 90 degrees counterclockwise from this state to return to the state shown in FIG.

The feed screw mechanism 4 includes a handle 10, a screw 4a, a bevel gear 4b connected to the handle 10 and the screw 4a, a screw hole 4c formed in each of the fixed side clamp member 2, the bearing plate 3a, and the screw. 4d. The screw 4a has a right-hand thread 4e and a left-hand thread 4f, which are threaded into screw holes 4c and 4d, respectively. Further, the movable clamp member 3 is provided with a hole 4g through which a screw 4a can be inserted. Therefore, the movable side clamp member 3 is attached to the bearing Fi.
Move with 3a. Therefore, by turning the handle 10, the stationary clamp member 2 and the movable clamp member 3 can be brought closer or separated, and a desired distance between the stationary clamp member 2 and the movable clamp member 3 can be obtained. .

Since the fixed side clamp member 2 and the driving side clamp member 3 have substantially the same structure, only the fixed side clamp member 2 will be explained about the same structure, and the movable side clamp member 3 will have the same structure. A reference numeral is given and the explanation thereof will be omitted.

Reference numeral 12 indicates a lower clamp stand, and the upper clamp stand 11 is attached to the upper surface of the lower clamp stand 12 so as to be swingable about the bin 13 as a fulcrum. A cavity 24 is formed in the lower clamp base I2, and a cam 20 is rotatably supported by a pin 21 and provided within this cavity 24. A lever 22 that projects downward is attached to the cam 20. Reference numeral 18 denotes a loft bin, which passes through the rear end of the upper clamp table 11 and is prevented from being removed by a nand 19.

A lower electrode 15 made of copper is provided at the tip of the upper surface of the lower clamp table 12 . Further, an upper electrode 16 made of copper is provided on the upper clamp stand 11 so as to face the lower electrode 15 . Reference numeral 17 indicates a spring, and this spring 17 urges the upper clamp base 11 clockwise, that is, in the direction in which the upper electrode 16 opens. This biasing force is Lontobin 1
8 is brought into pressure contact with the circumferential surface of the cam 20, and this pressure contact restricts the opening of the upper electrode 16.
is normally in pressure contact with the lower electrode 15. Furthermore, when the lever 22 is pulled in the direction indicated by the arrow, the cam 20 rotates counterclockwise, and the biasing force of the spring 17 lowers the rotation speed, and the upper clamp base 11 opens to connect the lower electrode 15 and the upper electrode 16. There is a gap between them.

The lower electrode I5 of the stationary clamp member 2 is connected to a transformer 30 as a current supply means, and the lower electrode 15 of the movable clamp member 3 is connected to the transformer 30 via a power supply control means 31. 31J t 118 means 31 is connected to an infrared sensor 32 as temperature detection means. The infrared sensor 32 is arranged at a position facing the wire S held by the stationary clamp member 2 and the movable clamp member 3. The infrared sensor 32 has a function of detecting the temperature of an object that emits infrared rays.

Next, the operation of annealing the high carbon steel wire S after welding it using this annealing apparatus will be described. In this embodiment, the wire rod has a diameter of 0.1 to 2 cm, but the annealing apparatus according to the present invention does not limit the diameter of the wire rod to this range.

The wire S is fixed between the fixed side clamp member 2 and the movable side clamp member 3.
This section explains the work to maintain the bridge in a bridged state.

The fixed clamp member 2 and the movable clamp member 3 are moved by turning the handle 10, and the spacing is determined according to the length of the wire S. Then, as shown in FIG. 5, pull the levers 22 of the stationary clamp member 2 and the movable clamp member 3,
A gap is created between the lower electrode 15 and the lower electrode 16, and both ends of the wire S are inserted into this gap. Then, the lever 22 is returned to its original position, and as shown in FIG. 6, the wire S is held between the pole 15 on the lower side and the pole 16 on the upper side of both clamp members 2.3.

Next, as shown in FIG. 7, the spout 9 is rotated 90 degrees clockwise, and the connecting spring 8.8 applies an urging force to the movable clamp member 3 in the direction of pulling the wire S. That is, the wire S is pulled by the elastic force of the connection spring 8.8.

Then, the main switch of the annealing device is turned on, and the transformer 30, energization control means 31, and infrared sensor 32 are activated. Then i! The wire S generates heat due to the lit and expands due to thermal expansion. As described above, since the movable clamp member 3 is biased in the direction of pulling the wire S by the connection spring 8.8, it moves in the direction of pulling the wire S by the amount that the wire S has expanded. Therefore, the slack of the wire S as shown by the dashed line in FIG. 8 does not occur,
The wire S is always kept straight.

At this time, the infrared sensor 32 detects the temperature of the wire S by detecting infrared rays generated from the wire S.

Based on this detected value, the energization control means 31 controls the direction from the transformer 30 to the electrode 15 so that the wire S is annealed most appropriately.
The current flowing to the wire S via 16 is controlled.

In the above embodiment, the lock cam 9 is used to restrict and release the movement of the movable clamp member 3, but the present invention is not limited to this, and an actuator using a solenoid may also be used.

Further, the screw feed mechanism 4 in the above embodiment has a handle 1
The fixed side clamp member 2 and the movable side clamp member 3 are moved by turning the handle 1.
It is also possible to use a pulse motor instead of 0.

Further, in the above embodiment, one of the pair of clamp members is fixed and the other moves to pull the wire, but it is also possible to have a configuration in which both of the pair of clamp members move.

r Effects of the Invention] As described above, according to the present invention, there is provided a clamp member moving means for moving the clamp member in the direction in which the wire is pulled during annealing, a temperature detecting means for detecting the temperature of the wire, and a temperature detecting means for detecting the temperature of the wire. By providing the energization control means for controlling energization based on the detected value of the detection means, the wire can be energized in a straight state at all times when the wire is energized. Therefore,
The distance between the temperature detection means and the wire is always constant, allowing accurate temperature detection of the wire. Therefore, accurate through-to-M control is possible, and the wire can be appropriately annealed.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of an annealing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 4, and FIG. Figure 4 is a front view of the same, Figures 5 to 7 are diagrams for explaining the work of holding the wire with the annealing apparatus of the example, and Figures 8 and 9 are the annealing of the wire with the annealing apparatus of the example. FIG. 6 is a diagram illustrating a state in which the movable clamp member moves as the wire expands when the wire rod is elongated. 2... Fixed side clamp member 3... Movable side clamp member 8... Connection spring (clamp member moving means) 9.
...Lock cam 30...Transformer (energization means) 31...Electrification control means 32...Infrared sensor (temperature detection means) Patent applicant
Hakusan Manufacturing Co., Ltd.

Claims (1)

[Claims] In an annealing apparatus having a pair of clamp members that hold the wire in a bridged state, and an energizing means for annealing the wire by energizing the wire, the clamp member is moved in a direction in which the wire is stretched by a distance that the wire extends when energized. A clamp member moving means for moving, a temperature detecting means arranged at a distance from the wire and detecting the temperature of the wire, and an energization control means for controlling the energizing means based on a detected value of the temperature detecting means. An annealing device characterized by: