A welding fixture for making main reinforcement of fan mesh cover

Abstract

The present invention relates to a welding fixture for making main reinforcement of a fan mesh cover, the welding fixture includes a welding base plate, and a first tightening block and a second tightening block are fixedly arranged on both sides of the welding base plate; the first flat steel and the second flat steel span between the first tightening block and the second tightening block, the first tightening block is provided with a left clamping position A and a right clamping position B with adjustable gap side by side, and the second tightening block is provided with a left clamping position C and a right clamping position D with adjustable gap side by side; the front end of the first flat steel is located at the left clamping position A of the first tightening block, the rear end of the first flat steel is located at the left clamping position C of the second tightening block, the front end of the second flat steel is located at the right clamping position B of the first tightening block, and the rear end of the second flat steel is located at the right clamping position D of the second tightening block; the first mounting piece is fixed on the first tightening block and abuts against the upper ends of the first and second flat steels; the second mounting piece is fixed on the second tightening block and abuts against the lower ends of the first and second flat steels.

Description

Technical Field

[0001] The invention relates to the field of fan equipment, in particular to a welding fixture for making main reinforcements of a fan mesh cover. Background Art

[0002] Fan grille, such as Figure 1 、 Figure 2 As shown, it includes a mesh cover body, which includes a coil rib 8 and a mesh cover main rib 7. The mesh cover main rib 7 includes two flat steels with the same structure (respectively a first flat steel 71 and a second flat steel 72), a first mounting plate 73 and a second mounting plate 74. The first mounting plate 73 is welded to the front end of the first flat steel 71 and the second flat steel 72, and a mounting hole is left in the middle of the first mounting plate 73. The second mounting plate 74 is welded to the rear end of the first flat steel 71 and the second flat steel 72, and two mounting holes are left in the middle of the second mounting plate 74. The main rib is welded by two formed flat steels and two mounting plates. The existing solution for welding the main rib is to make a fixed slotted fixture according to the size of the mesh cover main rib, clamp the formed flat steel in the mold slot for welding, and press the flat steel with a heavy object.

[0003] The gap between the two flat steels should be kept consistent during welding. The size of the mold is generally larger than the thickness of the flat steel itself. The gap cannot be too large, otherwise the flat steel position will be difficult to accurately position, which will affect the consistency of the product, resulting in problems with the aesthetics of the mesh and the dimensional tolerance. The gap cannot be too small, otherwise the main reinforcement of the mesh will be stuck in the fixture after welding, making it difficult to remove. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of product consistency that is easy to occur when welding the main reinforcement of the existing mesh disk. The present invention provides a welding fixture for making the main reinforcement of the fan mesh cover.

[0005] The present invention achieves the above-mentioned object through the following technical solution: a welding fixture for manufacturing the main reinforcement of a fan mesh cover, wherein the main reinforcement of the fan mesh cover includes two flat steels, a first mounting plate and a second mounting plate, and the flat steels include a first flat steel and a second flat steel. The welding fixture includes a welding base plate, characterized in that a first tightening block and a second tightening block are fixedly provided on both sides of the welding base plate;

[0006] The first flat steel and the second flat steel span between the first tensioning block and the second tensioning block. The first tensioning block is provided with a left clamping position A and a right clamping position B with adjustable gaps side by side. The second tensioning block is provided with a left clamping position C and a right clamping position D with adjustable gaps side by side.

[0007] The front end of the first flat steel is located at the left clamping position A of the first tensioning block, the rear end of the first flat steel is located at the left clamping position C of the second tensioning block, the front end of the second flat steel is located at the right clamping position B of the first tensioning block, and the rear end of the second flat steel is located at the right clamping position D of the second tensioning block;

[0008] The first mounting piece is fixed on the first tightening block and abuts against the upper ends of the first flat steel and the second flat steel; the second mounting piece is fixed on the second tightening block and abuts against the lower ends of the first flat steel and the second flat steel;

[0009] The first tensioning block includes a first base and a first tensioning assembly disposed on the first base. The first base is in the shape of two steps, the two steps being divided into an upper step and a lower step. The inner side surface of the upper step is in the shape of an inclined plane with an inclined groove formed thereon. The first tensioning assembly is installed in the groove.

[0010] The first tensioning assembly extends out of the opening of the groove and includes a cylinder, a first clamping block and a second clamping block that cooperate with each other;

[0011] The first clamping block and the second clamping block are arranged side by side and staggered, forming the left clamping position A and the right clamping position B between the two;

[0012] The cylinder drives the rotating shaft to pass through the first clamping block and the second clamping block, driving the first clamping block and the second clamping block to move left and right, so as to change the gap size between the left clamping position A and the right clamping position B;

[0013] The first clamping block includes a first base, a first protrusion and a second protrusion are respectively provided on the left and right sides above the first base, and a space is reserved between the first protrusion and the second protrusion; the second clamping block includes a second base, a third protrusion and a fourth protrusion are respectively provided on the left and right sides above the second base, and a space is reserved between the third protrusion and the fourth protrusion;

[0014] Two limiting holes are provided in the groove, and limiting shafts are provided at the bottom of the first base and the bottom of the second base, and the limiting shafts match the corresponding limiting holes;

[0015] A first notch is provided at the upper right corner of the first base, and a second notch is provided at the lower left corner of the second base. The first notch and the second notch cooperate with each other so that the first clamping block and the second clamping block are staggered and matched. The fourth protrusion is located between the first protrusion and the second protrusion, and forms the left clamping position A with the first protrusion;

[0016] The second protrusion is located between the third protrusion and the fourth protrusion, and forms the right clamping position B with the third protrusion;

[0017] The driving shaft of the cylinder passes through the first base and the second base in sequence, and the end of the driving shaft is fixedly connected to a connecting piece, which is located on the outside of the groove; a shaft retaining ring is provided on the driving shaft of the cylinder, and the shaft retaining ring is located between the outside of the groove and the connecting piece.

[0018] Furthermore, a left clamping block is provided at the left clamping position A of the first tensioning assembly, and the left clamping block is connected to the first protrusion of the first clamping block through an elastic stopper A; a right clamping block is provided at the right clamping position B of the first tensioning assembly, and the right clamping block is connected to the third protrusion of the second clamping block through an elastic stopper B.

[0019] Furthermore, the elastic block A ensures a gap of 0.2-0.5mm between the left clamping block and the second protrusion of the first clamping block; the elastic block B ensures a gap of 0.2-0.5mm between the right clamping block and the fourth protrusion of the second clamping block.

[0020] Furthermore, the corner of the upper step is in a smooth arc shape, which is adapted to the curvature of the front end of the flat steel.

[0021] Furthermore, the second tensioning block has the same or corresponding structure as the first tensioning block and is disposed on the welding base plate in back-to-back relationship.

[0022] Compared with the prior art, the present invention has the following advantages: (1) The fixture simultaneously clamps and releases two formed flat steel bars using a single cylinder, ensuring that the workpiece can be easily removed after welding. (2) Because the workpiece is a double-ribbed piece, and both the workpiece and the fixture are hardware, the double ribs are also clamped simultaneously, and the use of an elastic stopper and clamping block structure ensures flexibility during the clamping process. (3) Because the workpiece is clamped before welding, the consistency of the workpiece can be guaranteed after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the fan mesh cover;

[0024] Figure 2 yes Figure 1 Schematic diagram of the main reinforcement of the mesh cover;

[0025] Figure 3 is a schematic diagram of the welding fixture;

[0026] Figure 4 yes Figure 3 Schematic diagram of the first base;

[0027] Figure 5 yes Figure 3 Schematic diagram of the first tensioning assembly in FIG;

[0028] Figure 6 yes Figure 3 Schematic diagram of the first clamping block in;

[0029] Figure 7 yes Figure 3 Schematic diagram of the second clamping block in;

[0030] Figure 8 yes Figure 5 Schematic diagram of the cooperation between the first clamping block and the second clamping block. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings:

[0032] A welding fixture for making the main reinforcement of the fan mesh cover, such as Figure 3 As shown, the welded base plate 1 includes a first tensioning block 3 and a second tensioning block 2 fixedly mounted on either side of the welded base plate 1. A first flat steel bar 71 and a second flat steel bar 72 span between the first tensioning block 3 and the second tensioning block 2. The first tensioning block 3 is provided with a left clamping position A and a right clamping position B with adjustable gaps, while the second tensioning block 2 is provided with a left clamping position C and a right clamping position D with adjustable gaps. The front end of the first flat steel bar 71 is positioned at the left clamping position A of the first tensioning block 3, while the rear end of the first flat steel bar 71 is positioned at the left clamping position C of the second tensioning block 2. The front end of the second flat steel bar 72 is positioned at the right clamping position B of the first tensioning block 3, while the rear end of the second flat steel bar 72 is positioned at the right clamping position D of the second tensioning block 2. A first mounting plate 73 is fixed to the first tensioning block 3, abutting the upper ends of the first and second flat steel bars 71 and 72. A second mounting plate 74 is fixed to the second tensioning block 2, abutting the lower ends of the first and second flat steel bars 71 and 72.

[0033] The structures of the first tightening block 3 and the second tightening block 2 are basically the same. They are arranged back to back on the welding base plate 1. A first mounting plate 73 is fixed above the first tightening block 3, and a positioning column is provided on it; a second mounting plate 74 is fixed above the second tightening block 2, and two positioning columns are provided on it.

[0034] Specifically, the first tensioning block 3 includes a first base 20 and a first tensioning assembly arranged on the first base 20, such as Figure 4 As shown, the first base 20 is in the shape of two steps, and the corner of the upper step is in the shape of a smooth arc, which is adapted to the curvature of the front end of the flat steel. The inner side of the upper step is in the shape of an inclined plane, and an inclined groove 21 is opened on it. The first tensioning component is installed in the groove 21. Figure 5 As shown, the second tensioning block 2 comprises a second base and a second tensioning assembly mounted on the second base. The second base has two steps, with the corner of the upper step forming a smooth arc to match the curvature of the flat steel rear end. The inner side of the first step is an inclined plane with an inclined groove 21 defined therein, into which the second tensioning assembly is mounted. The first and second tensioning assemblies have the same structure.

[0035] like Figure 5As shown, the first tensioning assembly includes a cylinder 510, a first connecting block 610, a second clamping block 410, a first clamping block 310 and a second connecting piece 710. The cylinder 510, the first connecting block 610, the second clamping block 410, the first clamping block 310 and the second connecting piece 710 are arranged side by side in sequence. The first clamping block 310 and the second clamping block 410 are located in the groove 21. The height of the first clamping block 310 and the second clamping block 410 is deeper than the groove 21 and extends out of the opening of the groove 21.

[0036] The first clamping block 310 and the second clamping block 410 are arranged side by side and staggered, forming a left clamping position A and a right clamping position B between them. The drive shaft of the cylinder 510 passes through the first clamping block 310 and the second clamping block 410, driving the first clamping block 310 and the second clamping block 410 to move left and right to change the gap between the left clamping position A and the right clamping position B.

[0037] Specifically, if Figure 6 、 Figure 7 As shown, the first clamping block 310 includes a first base 316, with a first protrusion 314 and a second protrusion 315 on the left and right sides above the first base 316, respectively, and a space reserved between the first protrusion 314 and the second protrusion 315. The second clamping block 410 includes a second base 416, with a third protrusion 415 and a fourth protrusion 414 on the left and right sides above the second base 416, respectively, and a space reserved between the third protrusion 415 and the fourth protrusion 414. Two limiting holes 22 are provided in the groove 21, and limiting axes are provided at the bottom of the first base 316 and the bottom of the second base 416. The limiting axis at the bottom of the first base 316 is the first limiting axis 312, and the limiting axis at the bottom of the second base 416 is the second limiting axis 412. The limiting axes extend into the corresponding limiting holes 22. A first notch is defined at the upper right of the first base 316, and a second notch is defined at the lower left of the second base 416. The first and second notches cooperate to allow the first clamping block 310 and the second clamping block 410 to interlock. The fourth protrusion 414 is located between the first and second protrusions 314 and 315, forming a left clamping position A with the first protrusion 314. The second protrusion 315 is located between the third and fourth protrusions 415 and forming a right clamping position B with the third protrusion 415. The cylinder 510 and the first connecting block 610 are located on the left side of the groove 21. The drive shaft 511 of the cylinder 510 sequentially passes through the first connecting block 610, the first base 316, the second base 416, and the second connecting member 710. The second connecting member 710 is fixed to the right side of the groove 21. The first connecting block 610 and the second connecting member 710 secure the first and second bases 316 and 416 within the groove 21. A shaft retaining ring is provided on the driving shaft 511 of the cylinder 510 , and the shaft retaining ring is located on the right side of the groove 21 and between the second connecting member 710 .

[0038] like Figure 8As shown, the left clamping position A of the first tensioning assembly is provided with a left clamping block 311, which is connected to the first protrusion 314 of the first clamping block 310 via an elastic stopper A313. The right clamping position B of the first tensioning assembly is provided with a right clamping block 411, which is connected to the third protrusion 415 of the second clamping block 410 via an elastic stopper B413. Elastic stopper A313 ensures a clearance of 0.2-0.5 mm between the left clamping block 311 and the second protrusion 315 of the first clamping block 310; elastic stopper B ensures a clearance of 0.2-0.5 mm between the right clamping block 411 and the fourth protrusion 414 of the second clamping block 410. The purpose of ensuring the elastic gap through the elastic block A / B is to ensure that the flat steels can be clamped within the tolerance range. For example, the thickness difference of the first flat steel is 0.2mm, and the thickness difference of the second flat steel is 0.2mm, but both are within the flat steel thickness tolerance. This elastic gap is to compensate for this tolerance and ensure that both flat steels can be clamped.

[0039] Working process description: Place the first and second flat steel bars 71 and 72 into the corresponding clamping positions of the first and second tensioning blocks 3 and 2, respectively. Insert the mounting holes of the first mounting plate 73 into the positioning posts of the first tensioning block 3, and the mounting holes of the second mounting plate 74 into the positioning posts of the second tensioning block 2. At this point, the front ends of the first and second flat steel bars 71 and 72 abut against the first mounting plate 73, and their rear ends abut against the second mounting plate 74. The cylinder activates, tightening both clamping positions, and welding can begin. Because a single cylinder simultaneously clamps and releases the two formed flat steel bars, this ensures easy removal of the workpiece after welding.

[0040] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A welding fixture for making main reinforcement of a fan mesh cover, wherein the main reinforcement of the fan mesh cover includes two flat steels, a first mounting plate and a second mounting plate, the flat steels include a first flat steel and a second flat steel, and the welding fixture includes a welding base plate, characterized in that: A first tightening block and a second tightening block are fixedly provided on both sides of the welding base plate; The first flat steel and the second flat steel span between the first tensioning block and the second tensioning block. The first tensioning block is provided with a left clamping position A and a right clamping position B with adjustable gaps side by side. The second tensioning block is provided with a left clamping position C and a right clamping position D with adjustable gaps side by side. The front end of the first flat steel is located at the left clamping position A of the first tensioning block, the rear end of the first flat steel is located at the left clamping position C of the second tensioning block, the front end of the second flat steel is located at the right clamping position B of the first tensioning block, and the rear end of the second flat steel is located at the right clamping position D of the second tensioning block; The first mounting piece is fixed on the first tightening block and abuts against the upper ends of the first flat steel and the second flat steel; the second mounting piece is fixed on the second tightening block and abuts against the lower ends of the first flat steel and the second flat steel; The first tensioning block includes a first base and a first tensioning assembly disposed on the first base. The first base is in the shape of two steps, the two steps being divided into an upper step and a lower step. The inner side surface of the upper step is in the shape of an inclined plane with an inclined groove formed thereon. The first tensioning assembly is installed in the groove. The first tensioning assembly extends out of the opening of the groove and includes a cylinder, a first clamping block and a second clamping block that cooperate with each other; The first clamping block and the second clamping block are arranged side by side and staggered, forming the left clamping position A and the right clamping position B between the two; The cylinder drives the rotating shaft to pass through the first clamping block and the second clamping block, driving the first clamping block and the second clamping block to move left and right, so as to change the gap size between the left clamping position A and the right clamping position B; The first clamping block includes a first base, a first protrusion and a second protrusion are respectively provided on the left and right sides above the first base, and a space is reserved between the first protrusion and the second protrusion; the second clamping block includes a second base, a third protrusion and a fourth protrusion are respectively provided on the left and right sides above the second base, and a space is reserved between the third protrusion and the fourth protrusion; Two limiting holes are provided in the groove, and limiting shafts are provided at the bottom of the first base and the bottom of the second base, and the limiting shafts match the corresponding limiting holes; A first notch is provided at the upper right corner of the first base, and a second notch is provided at the lower left corner of the second base. The first notch and the second notch cooperate with each other so that the first clamping block and the second clamping block are staggered and matched. The fourth protrusion is located between the first protrusion and the second protrusion, and forms the left clamping position A with the first protrusion; The second protrusion is located between the third protrusion and the fourth protrusion, and forms the right clamping position B with the third protrusion; The driving shaft of the cylinder passes through the first base and the second base in sequence, and the end of the driving shaft is fixedly connected to a connecting piece, which is located on the outside of the groove; a shaft retaining ring is provided on the driving shaft of the cylinder, and the shaft retaining ring is located between the outside of the groove and the connecting piece.

2. A welding fixture for making main reinforcement of fan screen according to claim 1, characterized in that: A left clamping block is provided at the left clamping position A of the first tensioning assembly, and the left clamping block is connected to the first protrusion of the first clamping block through an elastic stopper A; a right clamping block is provided at the right clamping position B of the first tensioning assembly, and the right clamping block is connected to the third protrusion of the second clamping block through an elastic stopper B.

3. A welding fixture for making main reinforcement of fan screen according to claim 2, characterized in that: The elastic block A ensures a gap of 0.2-0.5mm between the left clamping block and the second protrusion of the first clamping block; the elastic block B ensures a gap of 0.2-0.5mm between the right clamping block and the fourth protrusion of the second clamping block.

4. A welding fixture for manufacturing main reinforcement of a fan grille according to claim 1, characterized in that: The corner of the upper step is in a smooth arc shape, which is adapted to the curvature of the front end of the flat steel.

5. The welding fixture for manufacturing the main reinforcement of the fan screen according to claim 1 is characterized in that: The second tensioning block has the same structure as or corresponds to the first tensioning block and is disposed on the welding base plate in opposite directions.

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