Flexible anti-deformation welding tool

Abstract

The utility model discloses a flexible anti-deformation welding tool, and belongs to the field of welding accessory equipment for fixing or positioning workpieces. The tool comprises four right-angle bent plates, four movable screw rods, four adjusting plates and a center support. The four right-angle bent plates define a quadrangle; the four movable screws are arranged in pairs along the diagonal lines of the quadrangle, one ends of the four movable screws are respectively connected with the inner sides of the four right-angle bent plates through the four hinges, and the other ends of the four movable screws are respectively connected to the central bracket; the two ends of each adjusting plate are connected with the two adjacent right-angle bent plates respectively. The two ends of each adjusting plate are each provided with two kidney-shaped holes, the two ends of each right-angle bent plate are each provided with a positioning hole, and first bolts penetrate through the positioning holes and the kidney-shaped holes to fixedly connect each adjusting plate with the two adjacent right-angle bent plates. According to the tool, the overall size and shape of the quadrangle can be flexibly adjusted, so that the tool flexibly adapts to an inner hole tool of a to-be-welded workpiece, and mounting and dismounting are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of welding tool of inner support, belong to the welding auxiliary equipment (B23K37 / 04) technical field for workpiece fixation or positioning. BACKGROUND

[0002] Welding tool is a fixture for workpiece fixation, compression, positioning and other functions when welding, widely used in the welding of various welding materials, such as vehicles, tracks, pressure vessels, sheet metal, equipment assembly etc.But the existing inner support welding tool often has the following problems:

[0003] 1) tool structure is fixed, lack of universal adaptability, often a tool is only suitable for a kind of size workpiece welding, resulting in low welding efficiency, low material utilization rate;

[0004] 2) tool support structure is fixed, it is not convenient to disassemble and position after welding, and the operation difficulty is greater. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is: how to use a kind of inner support welding tool to adapt to the welding of workpiece of size change.

[0006] To solve the above technical problems, the technical scheme of the utility model is: a kind of flexible deformation prevention welding tool is provided, including four right angle bent plates, four movable screw rods, four adjusting plates and a center support;Four right angle bent plates enclose quadrilateral;Four movable screw rods are arranged in line along the diagonal of quadrilateral two by two, the respective one end of four movable screw rods spreading outward is respectively connected with the inner side of four right angle bent plates through four hinges, the respective other end of four movable screw rods converging inward is hinged to center support;Four adjusting plates are respectively arranged along the four sides of quadrilateral one by one, and the two ends of each adjusting plate are respectively connected with the two adjacent right angle bent plates;Each movable screw rod is sequentially connected from left-handed screw rod, double-headed screw rod and right-handed screw rod from outside to inside;The two ends of each adjusting plate are provided with two waist-shaped holes, and the two ends of each right angle bent plate are provided with positioning holes, and first bolts pass through the positioning holes and the waist-shaped holes to fixedly connect each adjusting plate with the two adjacent right angle bent plates.

[0007] Further, the center support includes an upper plate, a lower plate and a center column, the upper end of the center column is welded with the lower surface of the upper plate, the lower end of the center column is welded with the upper surface of the lower plate, corresponding fixing holes are formed in the four corners of the upper plate and the lower plate, and the respective other end of four movable screw rods converging inward is fixedly connected with the four movable screw rods through second bolts.

[0008] Further, one end of the left-hand screw is provided with an opening, the second bolt passes through the opening of the left-hand screw and the fixing holes of the upper plate and the lower plate to fixedly connect the one end of the left-hand screw with the upper plate and the lower plate; the double-end screw is provided with a left-hand external thread at one end and a right-hand external thread at the other end, and the external threads at the two ends of the double-end screw are matched with the external nut; the other end of the left-hand screw is provided with a left-hand internal thread and matched with the left-hand external thread of the one end of the double-end screw; the inner side of the right-angle bent plate is fixedly provided with a rib plate, and the hinge is fixed on the rib plate; the right-hand screw is connected with the hinge pin at one end, and the other end of the right-hand screw is provided with a right-hand internal thread and matched with the right-hand internal thread of the other end of the double-end screw.

[0009] Further, two ribs are fixed between the two right-angle edges of the right-angle bent plate, and the two ribs cross the one end of the left-hand screw.

[0010] In use, according to the inner hole size of the to-be-welded workpiece, the external nut is loosened, then the double-end screw is rotated to reduce the length of the double-end screw, so that the four right-angle bent plates are shortened inwardly, the overall size of the quadrilateral surrounded by the four right-angle bent plates is reduced, the position of the four right-angle bent plates is adjusted through the hinge and the rotating movable screw, meanwhile, the other end of the four movable screws which are hingedly connected to the center support also adaptively rotates when the four movable screws gather inwardly, meanwhile, the first bolt slides along the waist-shaped hole to change the distance between the two adjacent right-angle bent plates, that is, to change the length of the quadrilateral, so that the size and shape of the quadrilateral surrounded by the four right-angle bent plates are adjusted, the overall size and shape of the tooling is adapted to the inner hole of the to-be-welded workpiece, so that the tooling of the utility model can be placed in the inner hole of the workpiece, then the double-end screw is slowly rotated to make the four right-angle bent plates extend outwardly with the extension of the double-end screw, until the four right-angle bent plates respectively abut against the four edges of the inner hole of the workpiece and the double-end screw cannot continue to extend, then the external nut is tightened to fix and lock the length of the double-end screw, the tooling is fixed with the to-be-welded workpiece, and then the welding can be started. After the welding is completed, the external nut of the double-end screw is unlocked, and then the double-end screw is slowly rotated to reduce the length of the double-end screw, so that the overall size of the quadrilateral surrounded by the four right-angle bent plates is reduced, and then the tooling of the utility model can be separated from the inner hole of the workpiece.

[0011] Practices show that the utility model has the following remarkable advantages and beneficial effects:

[0012] 1) The movable screw unit makes the support tooling structure flexible and convenient to disassemble, and improves the welding efficiency.

[0013] 2) The hinge structure makes the movable screw unit freely rotate, so that the tooling can adapt to different structures of the to-be-welded workpiece, and the application range is wide.

[0014] Further, the outer side surface of the left-hand screw is ground flat to completely match the hinge.

[0015] Further, when the tooling is fitted to the position with the workpiece to be welded, four fixed blocks are inserted between the center column of the center support and the four movable screw rods converging to the other end of the center support, and the fixed blocks respectively abut against the center column and the four movable screw rods converging to the other end of the center support. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The schematic diagram of the perspective structure of one embodiment of the utility model.

[0017] Figure 2 The schematic diagram of the perspective structure of one embodiment of the utility model. Figure 1 The schematic diagram of the planar projection structure of one embodiment of the utility model.

[0018] Figure 3 The schematic diagram of the perspective structure of one embodiment of the utility model. Figure 1 The schematic diagram of the perspective structure of one embodiment of the utility model.

[0019] Figure 4 The schematic diagram of the support frame structure of one embodiment of the utility model.

[0020] Figure 5 The schematic diagram of the movable screw rod unit structure of one embodiment of the utility model

[0021] Wherein: 1 - center support, 2 - left-hand screw rod, 3 - right-hand screw rod, 4 - double-head screw rod, 5 - outer sleeve nut, 6 - right-angle bent plate, 7 - hinge, 8 - rib plate, 9 - rib strip, 10 - adjusting plate. DETAILED DESCRIPTION

[0022] Embodiment

[0023] The flexible anti-deformation welding tooling of the embodiment is as shown in Figure 1 , 2As shown in Figure 3, it comprises four right-angled bent plates 6, four movable screws, four adjustment plates 10, and a central support 1. The four right-angled bent plates 6 form a quadrilateral; the four movable screws are arranged in pairs along the diagonals of the quadrilateral, with two movable screws along one diagonal and the other two along the other diagonal. The outward-spanning ends of the four movable screws are connected to the inner sides of the four right-angled bent plates 6 via four hinges 7. The inward-converging ends of the four movable screws are connected to the central support 1 to form a hinged connection. Four adjustment plates 10 are arranged along each of the four sides of the quadrilateral, with each adjustment plate 10 connected to two adjacent right-angled bent plates 6 at its ends. Each movable screw is composed, from the outside inward, of a left-handed screw 3, a double-ended screw 4, and a right-handed screw 2, connected in sequence. Each adjustment plate 10 has two waist-shaped holes at each end, and each right-angled bent plate 6 has positioning holes at both ends. First bolts pass through the positioning holes and waist-shaped holes to securely connect each adjustment plate 10 to two adjacent right-angled bent plates 6. By moving the first bolts within the waist-shaped holes, the distance between two adjacent right-angled bent plates 6 can be adjusted, thereby adjusting the lengths of the four sides of the quadrilateral and, consequently, the overall dimensions of the tooling of this embodiment.

[0024] like Figures 1-3 As shown, the center bracket 1 includes an upper plate, a lower plate and a center column. The upper end of the center column is welded to the lower surface of the upper plate, and the lower end of the center column is welded to the upper surface of the lower plate. Corresponding fixing holes are opened at the four corners of the upper plate and the lower plate, and are fixedly connected to the other ends of the four movable screws that gather inward through second bolts.

[0025] like Figure 1 、 2 As shown in FIG3 , a hole is opened at one end of the left-handed screw rod 3, and a second bolt passes through the hole at one end of the left-handed screw rod and the fixing holes of the upper plate and the lower plate to fix the left-handed screw rod 3 to the upper plate and the lower plate. Figure 5 As shown, one end of the double-headed screw 4 is made of a left-handed external thread and the other end is made of a right-handed external thread. The external threads at both ends of the double-headed screw are equipped with outer nuts 5; the other end of the left-handed screw 3 is made of a left-handed internal thread and is matched with the left-handed external thread at one end of the double-headed screw 4. Figure 4 As shown, a rib plate 8 is fixed on the inner side of the right-angle bent plate 6, and the hinge 7 is fixed on the rib plate 8. Figure 2 、 3 As shown, one end of the right-hand screw 2 is pinned to the hinge 7, as shown in FIG. Figure 5 As shown, the other end of the right-hand screw 2 is provided with a right-hand internal thread and is matched with the right-hand internal thread of the other end of the double-headed screw 4. The telescopic length of the movable screw can be controlled by rotating the double-headed screw 4, thereby controlling the size of the entire tooling.

[0026] like Figure 1 、 Figure 3 and Figure 4As shown, two straight edges of the right-angle bent plate 6 are fixed with two strips 9, which cross the left screw 3 at one end.

[0027] In use, the tool of the present example first loosens the outer nut 5, loosens the first bolt, controls the length of the four movable screws by rotating the double-end screw 4, adjusts the position of the four right-angle bent plates 6 by rotating the four movable screws through the hinge 7, and simultaneously, the four movable screws also adaptively rotate when converging inwardly to the other end of the center support 1, and at this time, the two movable screws along the diagonal line present a broken line or curve movement; meanwhile, the first bolt slides along the waist-shaped hole to change the distance between the two adjacent right-angle bent plates 6, i.e., to change the length of the quadrilateral, so as to adjust the size and shape of the quadrilateral surrounded by the four right-angle bent plates 6, i.e., to change from a square to a rectangle, and then to make the overall size and shape of the tool adapt to the inner hole of the workpiece to be welded. After the overall size of the tool is first adjusted to be small, the tool is slowly inserted into the inner hole of the aluminum alloy frame workpiece to be welded, the four right-angle bent plates 6 are extended outwardly with the extension of the double-end screw 4, until the four right-angle bent plates 6 respectively abut against the four corners of the inner hole of the workpiece and the double-end screw cannot be further extended, and at this time, the two movable screws along the diagonal line basically present a straight line. When the tool is in complete contact with the workpiece to be welded without falling off, the length of the double-end screw is fixed by tightening the outer nut to ensure the rigidity and strength of the tool, and the tool and the workpiece to be welded are fixed, and then the welding or assembly can be started. After the welding or assembly is completed, the outer nut of the double-end screw is first unlocked, and then the double-end screw is slowly rotated to reduce its length, so that the overall size of the quadrilateral surrounded by the four right-angle bent plates is reduced, and then the tool of the present example can be separated from the inner hole of the workpiece.

[0028] In the present example, the movable screws formed by the left screw 3, the double-end screw 4 and the right screw 2 are sequentially connected, and when the movable screws are adjusted, the included angle formed by the four movable screws along the diagonal line also changes, and the included angle can change from four 90° to two 120° and two 60°, i.e., the quadrilateral surrounded by the four right-angle bent plates changes from a square to a rectangle.

[0029] In the present example, when the tool and the workpiece to be welded are matched in place, four fixed blocks can be inserted between the center column of the center support 1 and the other end of the center support 1 where the four movable screws converge inwardly.

[0030] In addition to the above examples, the present application can also have other embodiments, and any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope of the present application.

Claims

1. A flexible anti-deformation welding tooling, comprising four right-angle bent plates, four movable screws, four adjusting plates and a center support; characterized in that: The four straight angle bent plates form a quadrangle; four movable screws are arranged along the diagonal lines of the quadrangle, two by two; the outwardly diverging ends of the four movable screws are respectively connected to the inner sides of the four straight angle bent plates through four hinges; the inwardly converging ends of the four movable screws are hingedly connected to a center support; four adjusting plates are respectively arranged along the four sides of the quadrangle; the two ends of each adjusting plate are respectively connected to two adjacent straight angle bent plates; each movable screw is sequentially connected from outside to inside by a left-hand screw, a double-head screw and a right-hand screw; the two ends of each adjusting plate are provided with two waist-shaped holes; the two ends of each straight angle bent plate are provided with positioning holes; and a first screw is used to fixedly connect each adjusting plate to two adjacent straight angle bent plates through the positioning holes and the waist-shaped holes.

2. The tooling of claim 1, wherein: The center support comprises an upper plate, a lower plate and a center column; the upper end of the center column is welded to the lower surface of the upper plate; the lower end of the center column is welded to the upper surface of the lower plate; the four corners of the upper plate and the lower plate are provided with corresponding fixing holes; and a second screw is used to fixedly connect the inwardly converging ends of the four movable screws to the upper plate and the lower plate through the fixing holes.

3. The tooling of claim 2, wherein: The left-hand screw is provided with a hole at one end; the second screw is used to fixedly connect the one end of the left-hand screw to the upper plate and the lower plate through the hole at the one end of the left-hand screw and the fixing holes of the upper plate and the lower plate; the double-head screw is provided with a left-hand external thread at one end and a right-hand external thread at the other end; the external threads at the two ends of the double-head screw are matched with external sleeve nuts; the other end of the left-hand screw is provided with a left-hand internal thread matched with the left-hand external thread at one end of the double-head screw; the inner side of the straight angle bent plate is fixedly provided with a rib plate, and the hinge is fixed on the rib plate; the one end of the right-hand screw is pin-connected to the hinge; and the other end of the right-hand screw is provided with a right-hand internal thread matched with the right-hand internal thread at the other end of the double-head screw.

4. The tooling of claim 1, 2 or 3, wherein: Two ribs are fixed between the two straight angle edges of the straight angle bent plate, and the two ribs span the one end of the left-hand screw.

5. The tooling of claim 1, 2 or 3, wherein: The outer side surface of the left-hand screw is ground flat to completely match the hinge.

6. The tooling of claim 1, 2 or 3, wherein: When the tooling is matched to the position of the workpiece to be welded, four fixing blocks are inserted between the center column of the center support and the other ends of the four movable screws converging inwardly to the center support; and the fixing blocks are respectively abutted against the center column and the other ends of the four movable screws converging inwardly to the center support.

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