JP2002160065A - Long material production equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and quality of a product produced by equipment that products lengthy wire by welding short materials. SOLUTION: Clamps 21A, 21B of an upset welding apparatus, and a clamp 31 and a processing body 32 of a machining equipment 30 for removing welding burrs are positioned on a movable table 2, and the table 2 is made travel in conformity to a feed speed of a material. A tool 35 on the processing body 32 is made to travel, by a feeder mechanism 37, with a predetermined relative speed against a coupled body made by welded short materials 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a long material by continuously welding a plurality of short materials in a longitudinal direction to produce a long material.

[0002]

2. Description of the Related Art Conventionally, as a long material manufacturing apparatus which continuously welds a short material into a long material, a short material supply device, a welding device, a machining device for removing unnecessary portions of a welded portion, 2. Description of the Related Art A heating device (heating furnace), a plastic working device (forging device and drawing / drawing device), and a winding reel of a long material are sequentially arranged (see, for example, JP-A-11-737). reference). In such a long material manufacturing apparatus, it is necessary to clamp the material at the time of performing welding and machining, and therefore, the feeding of the material is periodically stopped.

[0003] However, there is a problem that when the feeding of the material is stopped, the productivity is deteriorated. This problem is remarkable in the case of difficult-to-cut materials such as molybdenum and tungsten which require a long time for machining.

Further, when the feeding of the material is stopped, the material stays in the heating furnace for a long period of time, causing a problem that the crystal grains are coarsened in that portion of the material and the mechanical strength is reduced. . When a decrease in the mechanical strength of the material occurs, it not only causes a problem when the product is actually used, but also causes a disconnection at the time of drawing and drawing in a subsequent process. As a solution to this problem, a method of igniting and extinguishing the heating device as necessary as disclosed in Japanese Patent Application Laid-Open No. H11-737, or a method in which the heating device is brought close to the material as necessary. There is a way to move it away or away. However, in the former case, there is a problem that the temperature of the heating furnace is not stabilized, and it becomes difficult to control the temperature of the material. In the latter case, there is also a problem that the operation of the moving mechanism takes a long time to reduce the productivity, and a problem that the apparatus becomes expensive.

[0005] Further, when the material feeding is stopped, the drawing and drawing are performed intermittently, which leads to a problem that the quality of the product is deteriorated. Further, the winding to the take-up reel is not performed smoothly. There are also problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and continuously and smoothly performs a series of processes such as welding and various processes after welding without stopping the feeding of the material after welding. It is an object of the present invention to provide a long-length material manufacturing apparatus which can be implemented at a high speed and can obtain high-quality products with high productivity.

[0007]

In order to achieve the above object, the present invention relates to an apparatus for manufacturing a long material by continuously welding a plurality of short materials in a longitudinal direction to form a long material. , A welding device having a first clamp for gripping a rear end of a linked body of the preceding short material, a clamp for gripping a linked body of the short material, and a linked body of the short material A tool for removing unnecessary portions such as burrs or weld beads of a welded portion of the welding device, and means for feeding a connected body of short material in the longitudinal direction. 2 and the clamp of the machining device can move at a speed corresponding to the moving speed of the linked body of the short material, and the tool of the machining device has a predetermined shape with respect to the linked body of the short material. Can move at relative speed It is characterized in that the sea urchin configuration.

[0008] The first and second clamps of the welding device and the clamps of the machining device are moved at a speed corresponding to the moving speed of the linked body of the short material, and the tool of the machining device connects the short material. In order to be able to move at a predetermined relative speed with respect to the body, the elongate material manufacturing apparatus is provided with first and second clamps of the welding apparatus and clamps of the machining apparatus, and the longitudinal direction is formed in the longitudinal direction. It is preferable that the apparatus further includes a movable table that is movable, and a tool feed mechanism that is provided on the movable table and that sends a tool of the machining apparatus in the longitudinal direction.

Preferably, the welding device is a welding device for performing butt resistance welding such as upset welding and flash welding, and in this case, a first clamp of the welding device is movable to the movable table. And a second clamp of the welding device is fixed to the movable table.

[0010] This long material manufacturing apparatus is provided with a heating device or a plastic working machine that heats the connected body of the short material fed in the longitudinal direction after removing an unnecessary portion of the welded portion by the machining device. May be further provided with a plastic working device for performing the above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view schematically showing the entire layout of a long wire manufacturing apparatus according to the present invention. As shown in FIG. 1, a long wire manufacturing apparatus includes a material supply device 10, a welding device 20, and a machining device 3 which are sequentially arranged from an upstream side in a material feeding direction.
0, first heating furnace 40, forging device 42, second heating furnace 4
4, a drawing die 46, a feeder 48, and a take-up reel 50 are provided.

The material supply device 10 includes a short material 1 (hereinafter, referred to as a short material 1).
A stocker 11 that stocks many materials), a grindstone cutter 12 that cuts both ends of the material taken out of the stocker 11, and edges of both end faces of the material 1 cut by the grinder 12 The part is a grinding stone 13a, 1
And a chamfering grinder 13 for chamfering by 3a.

As the welding device 20, upset welding,
A welding apparatus for performing butt resistance welding such as flash welding is used.

As shown in detail in FIG. 2, the welding apparatus 20 is capable of moving a movable table in a feed direction (direction of an arrow A in the figure) of a connected body of short materials 1 welded to each other and in a direction opposite thereto. Movable clamp 2 attached to 2
1A and a fixed clamp 21B immovably fixed to the movable table 2.

The movable clamp 21A has a clamp tip 23 for gripping the material 1 and a clamp cylinder 24 for opening and closing the clamp tip 23. The clamp tip 23 is provided with an electrode 25 for supplying a welding current to the material. The clamp cylinder 24 is fixed to the block 26.

The movable clamp 21A includes a pressure cylinder 27
Can move in the direction of the arrow A and in the opposite direction. By operating the pressurizing cylinder 27, the end face of the material clamped by the movable clamp 21A can be pressed against the end face of the material clamped by the fixed clamp 21B with a predetermined pressure.

The structure of the fixed clamp 21B is the same as the structure of the movable clamp 21A, except that the pressurizing cylinder 27 is not provided and cannot be moved.

The welding device 20 has a power supply 28 provided at a position distant from the movable table 2 and supplying a welding current to the electrode 25. The movable clamp 21A and the fixed clamp 21B of the welding device 20 are provided with terminal sensors 6a and 6b for detecting terminals of the material 1, respectively.

The machining device 30 removes unnecessary portions of welding burrs (weld beads when the welding device is not a butt resistance welding device) formed at the time of welding by the welding device 20.

As shown in detail in FIG. 2 in particular, the machining apparatus 30 has a pair of clamps 31 fixed on the movable table 2 and a processing section 32 arranged between the clamps 31.

Each clamp 31 includes a clamp tip 31a for clamping the material 1, a clamp cylinder 31b for opening and closing the clamp tip 31a, and a clamp cylinder 31b.
b, and has a block 31c fixed to the movable table 2.

The processing section 32 has a movable base 33 movable on the movable table 2 and a tool holder 34 rotatably supported by the movable base 33.
4 holds a grinding wheel 35, that is, a tool. Note that, depending on the type of material, a cutting tool can be used as a tool instead of the grinding wheel 35. Tool holder 34
Is driven to rotate by a motor 36.

The movable base 33 is moved on the movable table 2 in the direction of the arrow A by a ball screw mechanism 37 comprising a screw shaft mounted on the movable table 2 and driven to rotate by a motor and a nut integrated with the movable base 33. And in the opposite direction. The movable base 33
May be adopted other than the ball screw mechanism 37 shown in the figure.

The movable table 2 can be moved on the base 3 by the driving mechanism 4 in the direction A and the opposite direction. In FIG. 2, the driving mechanism includes a rack 4a provided on the base 3 and a motor 4c provided on the movable table 2.
However, the movable table 2 can be moved by another driving mechanism, for example, a ball screw mechanism.

It should be noted that the drive mechanism 4 may be one that performs only the feed in the direction opposite to the direction of the arrow A. That is, when the strength and rigidity of the material are sufficiently high, the movable table 2 may be driven in the direction of the arrow A by clamping the material 1 with the clamp 31 and by the material driving force. .

In FIG. 2, a member denoted by reference numeral 5 is a controller for controlling the operation of the whole long material manufacturing apparatus. The controller 5 includes at least the welding device 2
0 power supply unit 28, movable clamp 21A, fixed clamp 2
1B and a pressure cylinder 27, a clamp 31, a motor 36, and a ball screw mechanism 37 of the machining apparatus 30, a motor 4c of the drive mechanism 4 of the movable table 2, and a function of controlling the operation of the feed roller 52. I have.

It should be noted that in FIGS.
The member indicated by is also a feed roller.

The forging device 42 shown in FIG.
1 that acts to crush the welded part from above and below
Dies 42a, 42a and a second die 42 acting to crush from the lateral direction (the direction perpendicular to the plane of FIG. 1).
b, 42b. The forging device 42 is fixed to the base 3.

The first and second heating furnaces 40 and 44 and the drawing and drawing die 46 are fixed by a suitable support member and are immovable with respect to the base 3.

A feeder 48 schematically shown in FIG. 1 has a configuration in which a plurality of air chucks are connected in a chain shape, and is for generating a force for pulling out the material 1 from the drawing wire die 46. is there. Note that, in the long material manufacturing apparatus shown in FIG. 1, the driving force for feeding the linked body of the short material in the direction of the arrow A is mainly generated by the feeder 48.

Next, the operation will be described with reference to FIGS. In FIG. 3 showing a series of operations,
The short materials 1 (including those after welding) are sequentially denoted by reference numerals 1a, 1b, 1c,.
・ ・ Shall be added. As the short material 1, for example, a rod material of molybdenum (for example, having a diameter of 5.3 mm and a length of about 6 m) can be used.

FIG. 3A shows a state before the welding burrs between the already welded material 1a and the material 1b are removed and immediately before the welding of the material 1b and the material 1c. The state is shown. At this time, the material 1a and the material 1b are clamped by the clamps 31 of the machining device 30, respectively, and the material 1b and the material 1c are fixed by the fixed clamp 21B and the movable clamp 2 of the welding device 20.
1A. At this time, the movable clamp 21A is located at the standby position Sa. Also,
At this time, the movable table 2 holds the material 1 already welded.
It is moving at the same speed as the feed speed of the connected body including a and 1b. Thereafter, the movable table 2 continues to move at the same speed.

Next, the movable clamp 2 is moved by the cylinder 27.
1A advances from the standby position Sa toward the fixed clamp 21B, and the material 1c clamped by the movable clamp 21A
Is pressed against the rear end of the material 1b clamped by the fixed clamp 21B, and the power supply 28
Supplies a welding current to the electrode 25 to perform butt welding. The state at this point is shown in FIG.

When the welding is completed, the tool holder 34 of the machining apparatus 30, that is, the grindstone 35 starts rotating. At the same time or slightly before and after, the movable base 33 of the machining apparatus 30 at the standby position Sb is
The upper part starts moving in the direction opposite to the feed direction A of the connected body including the materials 1a and 1b, whereby the grindstone 35 starts to move at a predetermined relative speed with respect to the materials 1a and 1b, and the removal of welding burrs is started. You.

At this time, in which direction the grindstone 35 moves with respect to the stationary system (for example, with respect to the base 3),
It is determined by the correlation between the moving speed of the movable table 2 with respect to the base 3 and the moving speed of the movable base 33 with respect to the movable table 2. If the material is a difficult-to-cut material such as molybdenum, the moving speed of the movable base 33 with respect to the movable table 2 will be set to be sufficiently small. Moves rightward in the figure.

As the movable base 33, that is, the grindstone 35 moves relative to the movable table 2, welding burrs are deleted. FIG. 3 shows the state at the time when the welding burrs have been deleted.
It is shown in (c). At this time, the welding burrs are not completely removed, but are removed so that a forging allowance at the time of forging by the forging device 42 performed later remains. Therefore, after machining by the machining device 30, a part of the welding burr is left in a cylindrical shape having a diameter slightly larger than the diameter of the material as schematically shown in FIGS. The diameter of this cylinder is such that the short material 1 is a bar of molybdenum (5.3 mm diameter
If the length is 6 m), the upper limit is about 7.3 mm.

In the above description, the machining by the machining device 30 is started after the welding by the welding device 20. However, the present invention is not limited to this, and the welding may be performed after the machining. The welding and the processing may be performed at the same time or at a slightly shifted timing.

When the machining by the machining device 30 is completed, the movable clamp 21A, the fixed clamp 21B of the welding device 20 and the clamp 31 of the machining device 30 release the materials 1a, 1b, 1c. Next, the movable table 2 that has moved in the direction of the arrow A starts moving in the opposite direction. Further, the movable clamp 21A of the welding device 20 returns to the standby position Sa, and the movable base 33 of the machining device 30 returns to the standby position Sb. This state is shown in FIG.

When the movable table 2 moves in the opposite direction and the rear end of the material 1c is detected by the terminal sensor 6b disposed on the fixed clamp 21B, the movable table 2 is connected again in the direction of arrow A. Start moving at the same speed as the body's feed speed. At about the same time, the fixed clamp 21
B clamps the rear end of the material 1c.

On the other hand, the material 1d taken out of the stocker 11 is cut flat at both ends by a grindstone cutter 12 shown in FIG. After that, the material 1d is chamfered at both edges by grinding wheels 13a while the material 1d is supported by the feed rollers 14 and 14 while being rotated about its longitudinal axis by a rotating device (not shown). The material 1d is delivered from the feed roller 14 to the feed roller 52 just before the movable clamp 21A. The feed roller 52 feeds the material 1d such that the distance between the rear end of the material 1c being fed at a constant speed and the front end of the material 1d is kept constant. Therefore, the front end of the material 1d is located at a predetermined position in the movable clamp 21A of the welding device 20 almost at the same time as the rear end of the material 1c is clamped by the fixed clamp 21B. When this is detected by the terminal sensor 6a, the movable clamp 21A clamps the front end of the material 1d.

Further, at substantially the same time as the clamps by the movable clamp 21A and the fixed clamp 21B, the clamps 31, 31 of the machining device 30 clamp the materials 1a, 1b. This state is shown in FIG.

By repeating the above-described procedure, the short materials 1a, 1b, 1c, 1d,... Are sequentially welded to make them longer, and welding burrs are partially removed. In addition,
The above procedure is performed under the control of the controller 5.

The material processed by the welding device 20 and the machining device 30 passes through a first heating furnace 40, where it is heated for adjusting the weld structure and forging in the next step.

In the forging device 42, the remaining portions of the welding burrs are forged, and the weld structure is strengthened.

Next, the material passes through a second heating furnace 44 and is heated for drawing and drawing in the next step, and is drawn by a drawing and drawing die 46. And the material is the take-up reel 5
With 0, it is wound in a hoop shape.

According to the above-described embodiment, the movable clamp 21A and the fixed clamp 21B of the welding device 20 and the clamp 31 of the machining device 30 move at a speed corresponding to the moving speed of the welded short material connected body. It is possible,
In addition, since the tool 35 of the machining apparatus 30 is configured to be able to move at a predetermined relative speed with respect to the connected body of the short material to be welded, unnecessary portions of a welded portion are removed when performing welding. In this case, there is no need to stop feeding the material. For this reason, productivity can be improved.

In addition, since it is not necessary to stop feeding the material, the following advantages are obtained. First, since a specific portion of the material does not stay in the heating furnaces 40 and 44, it is possible to prevent the occurrence of a portion where the material strength is reduced due to excessive heat influence. Further, the drawing process by the drawing wire drawing die 46 can also be continuously and smoothly performed. Further, winding on the winding reel 50 can be continuously and smoothly performed.

The embodiment shown in FIGS. 1 to 3 can be modified in various ways as described below, and in such a case, an effect similar to that of the above-described embodiment can be obtained.

For example, the welding device 20 and the machining device 30
Need not be provided on a common movable table,
It may be provided on a separate movable table.

The target material may be a difficult-to-cut material such as molybdenum or tungsten, or may be a general material such as aluminum or steel.

The arrangement of various devices provided downstream of the machining apparatus 30 can be arbitrarily determined according to the required processing. For example, it is not necessary to provide only a heating furnace and merely provide a plastic working device (forging device 42, drawing / drawing die 46, etc.) just to adjust the metal structure of the welded portion. In this case, a feed roller may be disposed at an appropriate position instead of the feeder 48, and the connected body of the short material may be fed by the feed roller. In addition, the heating furnace may be omitted as long as the material can be cold worked. In this case, the welding burrs may be completely removed by the machining device 30.

Further, a welding device other than a butt resistance welding device can be used.

[0053]

As described above, according to the long material manufacturing apparatus of the present invention, high quality long material can be manufactured with high productivity.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall layout of a long material manufacturing apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing in detail a configuration of a welding device and a machining device of the long material manufacturing device shown in FIG.

FIG. 3 is a process chart showing operations of the welding device and the machining device.

[Explanation of symbols]

1a, 1b, 1c, 1d,... Short material 2 Movable table 20 Welding device 21A First clamp (movable clamp) 21B Second clamp (fixed clamp) 30 Machining device 31 Clamp 35 Tool 37 Tool feed mechanism 40 , 44 Heating device (heating furnace) 42 Plastic working device (forging device) 46, 48 Plastic working device (drawing wire drawing die and feeder) 48 Means for feeding a connected body of short material (feeder)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B24B 9/04 B24B 9/04 C

Claims (4)

[Claims] A long material manufacturing apparatus for continuously welding a plurality of short materials in a longitudinal direction to form a long material, wherein a first clamp for gripping a front end of the short material and a preceding short material are connected. A second clamp for gripping the rear end of the body;
A machining device having a clamp for gripping a connected body of short material, and a tool for removing unnecessary portions such as burrs or weld beads of a welded portion of the connected body of short material; and Means for feeding the connection body in the longitudinal direction, wherein the first and second clamps of the welding device and the clamps of the machining device move at a speed corresponding to the feeding speed of the connection body of the short material. Wherein the tool of the machining apparatus is configured to be able to move at a predetermined relative speed with respect to the linked body of the short material. 2. A movable table provided with the first and second clamps of the welding device and a clamp of the machining device and movable in the longitudinal direction, the movable table being provided on the movable table, A tool feed mechanism for feeding a tool in the longitudinal direction, wherein the movable table sets the first and second clamps of the welding device and the clamps of the machining device to a feed speed of a linked body of short material. The tool according to claim 1, wherein the tool is moved at a predetermined speed, and the tool feeding mechanism enables the tool of the machining device to move at a predetermined relative speed with respect to the connected body of the short material. Long material production equipment. 3. A welding apparatus for performing butt resistance welding such as upset welding and flash welding, wherein a first clamp of the welding apparatus is movably mounted on the movable table. 3. The apparatus according to claim 2, wherein the second clamp is fixed to the movable table. 4. A heating device or a plastic working device for heating a connected body of short material fed in the longitudinal direction after removing an unnecessary portion of a welded portion by the machining device. The long material manufacturing apparatus according to claim 1, further comprising: