JP2001162395A - Work holder for welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work holder for welding to clamp and position a work by a simple work. SOLUTION: Relating to the work holder 1 for welding, a work fitting plate 5 is fitted to an end of a shaft 2, and four clamps 11-14 are mounted on the surface of the work fitting plate 5. An insertion part where a diaphragm plate 2b of the work W can be dropped from the top side is formed between these four clamps 11-14 and the surface of the work fitting plate 5. When the diaphragm plate wb of the work is dropped from the top side between the upper clamps 11 and 12, the fitting position of the diaphragm plate wb is regulated by the positioning surface formed in each of the clamps 11-14. When a bolt 7 for clamp is screwed, the diaphragm plate wb is clamped between the bolt 7 and a clamping claw of each clamp. The position in the vertical direction and in the right-to-left direction of the diaphragm plate wb can be finely adjusted by an adjusting bolt 9 of each clamp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device for welding a diaphragm plate temporarily fixed to both ends of a cylindrical core portion to a core portion while rotating the diaphragm plate around an axis of the core portion. The present invention relates to a welding work holder used for holding a work in the welding apparatus.

[0002]

2. Description of the Related Art In the work of welding a diaphragm plate to both ends of a tubular core portion such as a box-shaped steel material, a diaphragm plate is temporarily fixed to both ends of a core portion, and one or a plurality of works in this state are temporarily fixed. Each diaphragm plate is welded to the end face of the core part by a welding machine while being held coaxially connected and rotated around the axis of the core part by a welding machine.

As shown in FIG. 7, a welding apparatus for performing such a welding operation includes welding work holders 100 and 200 for rotational driving and a welding work holder 30 for connection.
0, 400. The welding workpiece holders 100 and 200 for rotation driving are horizontally clamped coaxially by rotating bodies 800 and 900 supported by sliders 600 and 700 that can move along the rails 500, respectively. These welding work holders 100, 2
Reference numeral 00 includes shafts 101 and 201 having a box-shaped cross section which are clamped by rotating bodies 800 and 900, and work mounting plates 102, 103 and 202 and 203 mounted on both ends thereof.

Similarly, a welding work holder 30 for connection is provided.
Reference numerals 0 and 400 denote cylindrical shafts 301 and 401 and work mounting plates 302 and 3 attached to both ends thereof.
03, 402, and 403.

[0005] The work mounting operation is performed as follows.
First, the work W is attached to the work mounting plates 103 and 202 of the welding work holder 100 for rotation driving.
1. Attach W2. Next, welding work holders 300 and 40 for connection are respectively connected to the other ends of the works W1 and W2.
0 is attached. Thereafter, the work W3 is attached between the welding work holders 300 and 400 for connection.

After each of the workpieces W1 to W3 is mounted, welding is performed by a welding machine at each position indicated by an arrow in the figure while rotating the rotating bodies 800 and 900 in synchronization. When the rotating body is rotated once, the entire circumference welding for each work is completed. By increasing the number of welding work holders for connection, many workpieces can be held coaxially,
Welding work can be performed.

[0007]

In such a welding apparatus, it is convenient if the work for fixing the work to the welding work holders 300 and 400 can be easily performed.
Conventionally, the work is lifted horizontally, and the four corners of the diaphragm plate at one end are fixed to the surface of the work mounting plate of the welding work holder using a pair of clamping bolts. In this work, the work of positioning the work with respect to the work holder for welding cannot be easily performed.

Further, it is necessary to adjust the position of each welding work holder in the axial direction so that each work is securely clamped. If the distance between the welding work holders is too wide, the work cannot be reliably clamped between them. If the distance is too narrow, the work cannot be mounted between them. However, the conventional method cannot easily perform the positioning operation in the work axis direction.

[0009] The object of the present invention is to solve the above problems.
An object of the present invention is to provide a welding work holder capable of easily performing a work clamping operation. Another object of the present invention is to propose a welding apparatus having the new welding work holder.

[0010]

In order to solve the above-mentioned problems, according to the present invention, a work comprising a cylindrical core portion and a diaphragm plate temporarily fixed to both ends thereof is attached to the core portion. A welding work holder used when welding the diaphragm plate to the core portion while rotating about an axis is configured as follows.

That is, the welding work holder of the present invention comprises a clamp, a clamp bolt, a mounting plate to which these clamps and the clamp bolt are mounted, and a support for supporting the mounting plate. And a member.

Further, a plate insertion portion into which the diaphragm plate can be inserted is formed between the clamp member and the mounting plate, and the diaphragm inserted into the plate insertion portion by turning the clamp bolt. The plate can be clamped between the clamping tool and the clamping bolt.

Here, it is desirable that the width of the plate insertion portion can be increased or decreased according to the width of the diaphragm plate.

Further, it is desirable that the height dimension of the plate insertion portion can be increased or decreased according to the height dimension of the diaphragm plate.

Generally, since the diaphragm plate is a rectangular plate, four corners of the diaphragm plate may be clamped by the four clamps. In this case, these clamps can be mounted at positions at an angular interval of 90 degrees with respect to the center of the mounting plate, and
If each of the clamp members can be attached to a plurality of positions having different distances from the center, diaphragm plates having different sizes can be clamped.

[0016] Further, of the four clamps, two clamps adjacently arranged at an angular interval of 90 degrees are connected to a positioning portion for defining the position in the width direction and the vertical direction of the diaphragm plate; And a claw portion for clamping the diaphragm plate between the clamping bolt and the other two clamps, a positioning portion for defining a vertical position of the diaphragm, A claw for clamping the diaphragm plate with a clamping bolt; and the diaphragm plate can be inserted between positioning portions of these clamps.

[0017] It is desirable to attach an adjust bolt capable of finely adjusting the vertical and horizontal positions of the diaphragm plate to each clamp.

Next, it is preferable that a cap for preventing spatter from adhering at the time of welding is attached to a leg portion of the clamp bolt protruding from the surface of the attachment plate.

On the other hand, a welding apparatus according to the present invention includes the welding work holder having the above-described configuration.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a welding work holder to which the present invention is applied will be described below with reference to the drawings. The overall configuration of a welding device using the welding work holder of this example is the same as the general one shown in FIG.

FIG. 1 is a plan view, a front view, and a side view showing a state where a work is clamped using the work holder for welding of this embodiment. FIG. 2 is an exploded perspective view of the welding work holder of the present embodiment.

First, a description will be given of a welding work holder for rotational driving in this embodiment. This work holder 1 for rotational drive
Is a shaft 2 (support member) having a box-shaped cross section, reinforcing plates 3 and 4 fixed to both ends of the shaft, and a work mounting plate 5 mounted to both ends of the shaft via the reinforcing plates 3 and 4. , 6 and each work mounting plate 5, 6
And four clamps 11 to 14 attached to the surface of the slab. The work mounting plates 5 and 6 are each reinforced by four fastening bolts 31 and 41 (only the bolts 31 are shown in the figure).
4 and is fixed.

In the center of one of the reinforcing plate 3 and the work mounting plate 5, a bolt hole 3 through which a clamping bolt 7 is inserted is provided.
5 and 55 are formed, and the leg 71 of the clamping bolt 7 protrudes from the surface of the work mounting plate 5 through the bolt holes 35 and 55 from the side of the reinforcing plate 3, and the nut 8 is formed therein. It is screwed.

At the four corners of the work mounting plate 5,
Four sets of bolt holes 51 to 54 for mounting the clamp are formed at regular intervals toward the center (the holder central axis 1a). That is, the bolt holes 51 to 54 formed at the respective corners are arranged at 90-degree intervals so as to be located on four concentric circles, respectively.

Next, of the clamp tools 11 to 14,
The left and right upper clamps 11 and 12 located on the upper side have the same structure, and the left and right lower clamps 13 and 14 located on the lower side also have the same structure.

First, referring also to FIG.
1 will be described. The clamp 11 includes a rectangular parallelepiped main body 111, and a side surface of the main body 111 serves as a width direction positioning surface 112.
The projections 113 and 114 protrude vertically on both sides. The main body 111 and the one protrusion 113 are provided with the clamp 1
Screw holes 11 for fastening and fixing 1 to work mounting plate 5
5, 116 are formed. A triangular clamp pawl 117 is integrally formed between the other protrusion 114 and the lower edge 112a of the positioning surface 112. Since the other upper clamp member 12 also has the same structure, corresponding portions are denoted by the same reference numerals in the drawings, and description thereof will be omitted.

On the other hand, the lower clamp 13 is shown in FIG.
As shown in the figure, a main body 131 having a rectangular parallelepiped shape is provided, and an upper half of the main body 131 is cut at a right angle, and the orthogonal width direction positioning surface 132 and vertical direction positioning surface 133
Are formed. On one end side of the main body 131, a triangular clamp claw 137 is formed so as to connect the edges of the positioning surfaces 132 and 133. Main body 131
On the other end surface of are formed screw holes 135 and 136 for fastening and fixing the clamp 13 to the work mounting plate 5. Since the other lower clamp 14 has the same structure, the same reference numerals are given to the corresponding parts in the figure,
Their description is omitted.

The upper clamps 11 and 12 and the lower clamps 13 and 14 configured as described above are provided with any one of four sets of bolt holes 51 to 54 formed at four corners of the work mounting plate 5. The bolt can be fastened and fixed to the pair of bolt holes. In FIG. 1, each of the clamp tools 11 to 14 is fastened to a pair of outermost bolt holes 51 (positions farthest from the holder axis 1 a).

When the four clamps 11 to 14 are fastened and fixed to the work mounting plate 5, a diaphragm plate temporarily fixed to the end of the work can be dropped (insertable) between them. An insert is formed.

That is, as shown by an imaginary line in FIG. 1, the work W is composed of a core Wa having a box-shaped cross section and diaphragm plates wb and wb temporarily fixed to both ends thereof and each having a size larger than a square. It is assumed that

When each of the clamps 11 to 14 is fastened and fixed to a pair of bolt holes 51 formed on the outermost side,
A gap is formed between the clamp pawls 117 and 137 formed on each of the clamp tools 11 to 14 and the surface of the work mounting plate so that the diaphragm plate wb can be inserted with play. Also, the upper clamps 11 and 12
The spacing between the positioning surfaces 112, 112 is just a width dimension that allows the diaphragm plate wb to be dropped from above. Further, the positioning surfaces 132, 132 and the positioning surfaces 133, 133 of the lower clamp members 13, 14 are
Just, both lower corners of the diaphragm plate wb are set to positions that can be supported from both sides and the lower side.

Therefore, the four clamps 11 to 14
Is fastened and fixed to the surface of the work mounting plate 5 as described above, an insertion portion is formed in which the diaphragm plate wb of the work W can be dropped from above. Therefore, if the work W is lifted (lifted) and the diaphragm plate wb is dropped into the insertion portion from above,
The work W can be mounted on the work mounting plate 5 while being positioned by the four clamps 11 to 14.

Thereafter, when the clamping bolt 7 is screwed in using the circular opening 2a opened on the side surface of the shaft 2, the diaphragm plate wb of the work is formed by the tip of the leg 71 of the clamping bolt 7. The diaphragm plate wb is clamped between the bolt 7 and each of the clamp pawls 117 and 137 by being pressed toward the clamp pawls 117 and 137 of each clamp tool.

Here, screw holes 10 for adjusting bolts are formed on the outer surface of each of the clamp tools 11 to 14. As shown in FIG.
In, the screw hole 10 extends perpendicularly from the positioning surface 112, and the tip of the leg of the adjustment bolt 9 screwed into the screw hole 10 can protrude from the positioning surface 112. The other lower clamp 1
In 3 and 14, the screw holes 10 extend vertically from the two positioning surfaces 132 and 133, and the leg ends of the adjusting bolts 9 screwed into these screw holes 10 protrude from the positioning surfaces 132 and 133. It has become possible.

Therefore, by adjusting the screwing amount of the adjusting bolt 9 screwed into each of the clamps 11 to 14, the vertical position and the horizontal position of the diaphragm plate wb of the clamped work can be finely adjusted. Can be. The work W is clamped to the work mounting plate 5 by the adjusting bolt 9 and the clamp bolt 7 in a state where the work W is accurately positioned.

Next, when a small workpiece is clamped, the position where the clamps 11 to 14 are attached may be shifted toward the center. Also in this case, the positions of the work W in the vertical and horizontal directions can be finely adjusted by adjusting the screwing amounts of the adjusting bolts 9, and the work W is held by the adjusting bolts 9 at the finely adjusted positions.

Since the work mounting plate 5 is attached to the end of the shaft 2 by bolts, the work mounting plate 5 can be replaced with a work mounting plate having bolt holes for mounting clamps at different positions. With this configuration, works of various sizes can be held.

Here, when an excessive force is applied to the clamp tools 11 to 14 which are clamping the work W, the work mounting plate 5 on which the clamp tools 11 to 14 are mounted bends. Damage of the clamp members 11 to 14 is prevented beforehand.

Further, even if the clamp claws 117 and 137 of the clamp tools 11 to 14 are damaged during the welding operation or the like, the work W does not come off from the work holder for welding. This is because, as described above, the diaphragm plate wb of the work is also clamped from above, below, right and left by the adjustment bolt 9. Therefore, the welding work holder of the present example is also excellent in terms of safety and the like.

The structure is the same as that of the work mounting plate 6 at the other end of the work holder 1 for welding.

Further, the connection welding work holder 20 arranged between the held works is similarly constructed. That is, as shown in FIGS. 1 and 2, the welding work holder 20 for connection includes a cylindrical connection shaft 21 having a slit formed therein, and work mounting plates 25 and 26 fixed to both ends thereof. ing. Four clamps 11 to 14 can be attached to each of the work attachment plates 25 and 26, respectively. The work clamping mechanism using the welding work holder 20 is the same as the above-described rotary driving welding work holder 1, and therefore the description thereof is omitted. (Other Embodiments) Here, the leg 71 of the clamping bolt 7 is attached to the work W
Is exposed on the side. Therefore, the spatter generated at the time of welding may adhere to the exposed bolt leg 71, and the bolt may not be able to be turned.

To avoid such a problem, FIG.
As shown in the figure, a cylindrical cover 74 for covering the periphery of the protruding bolt leg 71 is attached to the surface of the work mounting plate 5, and a cup-shaped cap 7 is also attached to the tip of the bolt leg 71.
It is desirable that the bolt leg 71 be completely covered by mounting the bolt leg 5. In this case, the dimensions of each part may be set so that the inner peripheral surface of the outer peripheral wall 75a of the cap 75 slides on the outer peripheral surface of the cylindrical cover 74. Since there is an overlap between the cap outer peripheral wall 75a and the cylindrical cover 74, the bolt leg 71 is not exposed even if the amount of protrusion of the bolt leg 71 is changed.

Next, in order to reduce the weight of the clamps, for example, as shown in FIG.
May be cut into a triangular pyramid shape. Similarly, when the weight of the clamp members 13 and 14 is reduced, the same applies.

[0044]

As described above, according to the welding work holder of the present invention, the insertion portion into which the diaphragm plate of the work can be inserted is formed by the clamp tool mounted on the surface of the work mounting plate. The inserted diaphragm plate is pushed in the axial direction of the holder by using a clamping bolt to clamp between the bolt and the clamping fixture. Therefore, as before,
The work can be clamped to the welding work holder by a simple operation as compared with a case where the four corners of the rectangular diaphragm plate are fixed to the work mounting plate with a pair of bolts.

Further, since the mounting position of the clamp member can be changed, works having different sizes can be easily clamped.

Further, since an adjustment bolt for finely adjusting the position of the work in the vertical and horizontal directions is provided,
The work can be easily clamped to the work holder for welding while the work is accurately positioned.

In addition, since the bolt leg of the clamping bolt is covered by the cap,
It is possible to avoid a problem that spatters adhere to this portion and the bolt does not move.

[Brief description of the drawings]

FIG. 1 is a plan view, a front view, and a side view showing a state where a work is held by a welding work holder to which the present invention is applied.

FIG. 2 is an exploded perspective view of the welding work holder of FIG. 1;

FIG. 3 is a perspective view showing an upper clamp in the welding work holder of FIG. 1;

FIG. 4 is a perspective view showing a lower clamp of the welding work holder of FIG. 1;

FIG. 5 is a partial hitting surface view showing a cap of a clamping bolt in the work holder for welding of FIG. 1;

FIGS. 6A and 6B are explanatory views showing an example in which the weight of the kunlap tool in the welding work holder of FIG. 1 is reduced; FIG. 6A is a perspective view thereof, and FIG. It is.

FIG. 7 is a schematic configuration diagram illustrating an overall configuration of a welding device including a welding work holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Welding work holder for rotation drive 1a Center axis 2 Shaft 3, 4 Reinforcement plate 5, 6 Work mounting plate 7 Clamp bolt 71 Bolt leg 74 Cylindrical cover 75 Cap 9 Adjust bolt 10 Bolt hole 11, 12 Upper side Clamps 13, 14 Lower clamps 111, 131 Main body 112, 132, 133 Positioning surface 117, 137 Clamping pawl 75 Cap 20 Welding work holder 21 for connection 21 Shaft 25, 26 Work mounting plate W Work wa Core wb Diaphragm plate

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[Procedure amendment]

[Submission date] January 7, 2000 (2000.1.7)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 7

Claims (8)

[Claims] When welding a diaphragm plate to a core part while rotating a workpiece composed of a cylindrical core part and a diaphragm plate temporarily fixed to both ends thereof around the axis of the core part, A welding work holder to be used, comprising: a clamp, a clamp bolt, a mounting plate on which the clamp and the clamp bolt are mounted, and a support member supporting the mounting plate. A plate insertion portion into which the diaphragm plate can be inserted is formed between the clamp member and the mounting plate, and the diaphragm plate inserted into the plate insertion portion is turned by turning the clamp bolt. And the clamping bolt can be clamped between the Work holder for welding. 2. The work holder for welding according to claim 1, wherein the width of the plate insertion portion can be increased or decreased according to the width of the diaphragm plate. 3. The welding work holder according to claim 1, wherein the height of the plate insertion portion can be increased or decreased according to the height of the diaphragm plate. 4. The apparatus according to claim 3, further comprising four clamps, wherein the clamps are arranged at a distance of 9 from the center of the mounting plate.
A work holder for welding, characterized in that it can be mounted at a position at an angular interval of 0 degrees and each clamp can be mounted at a plurality of positions at different distances from the center. 5. The clamp according to claim 4, wherein the two clamps arranged adjacent to each other at a 90-degree angle interval include a positioning part for defining a position of the diaphragm plate in a horizontal direction and a vertical direction, and the clamp for the clamp. A claw for clamping the diaphragm plate between the bolt and a bolt; and the other two clamps are a positioning portion for defining a vertical position of the diaphragm; And a claw portion for clamping the diaphragm plate between the clamp members, and wherein the diaphragm plate can be inserted between the positioning portions of the clamp tools. 6. The welding work holder according to claim 5, wherein an adjust bolt for finely adjusting the horizontal and vertical positions of the diaphragm plate is attached to the clamp. 7. The cap according to claim 1, wherein a cap for preventing spatter adhesion during welding is attached to a leg of the clamp bolt projecting from a surface of the attachment plate. Work holder for welding. 8. A welding apparatus comprising the welding work holder according to any one of claims 1 to 7.