A special fixture for V-shaped clamps

Abstract

This invention discloses a special fixture for V-shaped clamps, comprising: a limiting plate and an inner core; the limiting plate is arc-shaped, with a limiting block and two locking blocks on its outer side wall, the limiting block being located between the two locking blocks; the inner core is annular, with three protrusions on its outer peripheral wall, spaced apart circumferentially along the inner core; this fixture, through the combination and cooperation between the limiting plate and the inner core, and the limiting cooperation between the limiting plate and the clamping plate, can ultimately provide a relatively perfect support for the inner side of the V-shaped clamp, facilitating the welding of the steel strip of the V-shaped clamp to the clamping plate. Furthermore, since both the limiting plate and the inner core are movable, after welding, the inner core and the limiting plate can be moved separately to remove the fixture, ultimately preserving the welding state of the V-shaped clamp relatively perfectly and effectively improving the finished quality of the V-shaped clamp.

Description

Technical Field

[0001] This invention relates to the field of V-type clamp technology, and in particular to a special fixture for V-type clamps. Background Technology

[0002] In the industrial field, clamps are a widely used fastener, suitable for various professional applications. They offer strong sealing performance, are available in a variety of materials, and utilize projection welding for superior structural strength. They are widely used for connecting tubular structures. One type is the V-clamp. When two flanges are fitted together, a V-clamp is applied, and then the bolts are tightened. The circumferential force acts on the inclined surface, and the component of the circumferential force along the inclined surface presses the two flanges together. Through this fastening method, the two flanges are tightly pressed together, thus achieving a locking effect.

[0003] V-type clamps consist of a steel strip and a clamping plate. During processing, the clamping plate needs to be welded to the steel strip. In order to prevent the V-type clamp from deforming and to ensure the welding quality, a special fixture is required, hence this application. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a special fixture for V-shaped clamps.

[0005] The technical solution of the present invention is as follows: a special fixture for V-shaped clamps, the V-shaped clamps comprising a steel strip and clamping plates, the steel strip being a C-shape with an opening, one end of the steel strip being provided with a bolt, the other end being provided with a nut, the bolt being connected to the nut, the inner side of the steel strip being welded with an arc-shaped clamping plate, the clamping plate having a V-shaped cross-section, and three clamping plates being arranged at intervals along the circumference of the steel strip to define three first interval grooves, one of which is opposite to the opening of the steel strip, characterized in that the fixture comprises: a limiting piece and an inner core;

[0006] The limiting piece is arc-shaped, and a limiting block and two locking blocks are provided on the outer side wall of the limiting piece. The limiting block is located between the two locking blocks. The inner core is annular, and three protrusions are provided on the outer peripheral wall of the inner core and are spaced apart along the circumference of the inner core.

[0007] Three limiting pieces are spaced apart within the clamp to define three second interval grooves. The three limiting pieces are located on the same circumference and are respectively opposite to the three first interval grooves. The limiting pieces can move radially along the circumference to approach or move away from the corresponding first interval groove. Any one of the limiting pieces can move to abut against the inner side of any two adjacent clamping plates. At this time, the limiting block on the limiting piece is inserted into the corresponding first interval groove and clamped onto the steel strip. One of the two locking blocks on the limiting piece is locked into one clamping plate and the other is locked into the other clamping plate.

[0008] The inner core is movable along its own axis inside the hoop, so that the three protrusions can be inserted into or disengaged from the three second spacer slots respectively. When the protrusion is inserted into the second spacer slot, the inner core abuts against all the limiting pieces, and the protrusion abuts against the adjacent limiting piece.

[0009] Preferably, the limiting piece has two spaced-apart positioning holes.

[0010] Preferably, the shape of the card block matches the shape of the groove defined by the hoop.

[0011] Preferably, the card block and the limiting piece are an integral part, and the limiting block and the card block are detachably connected.

[0012] Preferably, the limiting plate has a countersunk hole, the limiting block has a threaded hole, and the limiting plate and the limiting block are connected by a countersunk screw.

[0013] Preferably, the inner peripheral wall of the inner core is provided with three welding positioning holes arranged at intervals along the circumference of the inner core.

[0014] Preferably, the inner peripheral wall of the inner core is provided with anti-slip grooves.

[0015] Preferably, the inner core can move up and down along its axial direction. When the inner core moves from top to bottom, it is inserted between the three limiting pieces and engages with them. When the inner core moves from bottom to top, it disengages from the limiting pieces. The outer peripheral edge of the upper surface of the limiting piece is provided with a first chamfer, and the outer peripheral edge of the lower surface of the inner core is provided with a second chamfer.

[0016] Preferably, the limiting block is provided with a hoop groove, and the steel strip passes through the hoop groove.

[0017] Preferably, of the three first interval slots, the one opposite to the opening of the steel strip is the main interval slot, and the rest are secondary interval slots; of the three limiting blocks, the one that cooperates with the main interval slot is the main limiting block, and the rest are secondary limiting blocks; both ends of the opening of the steel strip and the bolt are inserted into the hoop groove of the main limiting block.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This fixture, through the combination and cooperation between the limiting plate and the inner core, and the limiting cooperation between the limiting plate and the hoop, can ultimately support the fixture relatively perfectly inside the V-shaped clamp, facilitating the welding of the steel strip of the V-shaped clamp to the hoop. Since both the limiting plate and the inner core are movable, after welding is completed, the inner core and the limiting plate can be moved separately to remove the fixture, thus perfectly preserving the welding state of the V-shaped clamp and effectively improving the finished quality of the V-shaped clamp.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0022] Figure 1 This is a 3D view of a V-shaped clamp in existing technology;

[0023] Figure 2 This is a three-dimensional drawing of the fixture;

[0024] Figure 3 This is an exploded view of the fixture;

[0025] Figure 4 This is a three-dimensional drawing of the fixture;

[0026] Figure 5 This is a schematic diagram of a disk;

[0027] Figure 6 This is a schematic diagram of the fixture placed on the disc.

[0028] The attached figures are labeled as follows:

[0029] 1. Steel strip; 2. Hoop; 3. Bolt; 4. First interval groove; 5. Limiting plate; 6. Inner core; 7. Limiting block; 8. Locking block; 9. Protrusion; 10. Second interval groove; 11. Welded positioning hole; 12. Anti-slip groove; 13. Hoop groove; 14. Disc; 15. Moving plate; 16. Positioning hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "vertical," "circumferential," "radial," "axial," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] To facilitate the description of the fixture's structure and working principle, the V-type clamp will be described first, such as... Figure 1 As shown, the V-shaped clamp includes a steel strip 1 and a clamping plate 2. The steel strip 1 is C-shaped with an opening. One end of the steel strip 1 is provided with a bolt 3 and the other end is provided with a nut. The bolt 3 is connected to the nut. An arc-shaped clamping plate 2 is welded to the inner side of the steel strip 1. The clamping plate 2 has a V-shaped cross-section. There are three clamping plates 2. The three clamping plates 2 are arranged at intervals along the circumference of the steel strip 1 to define three first interval grooves 4. One of the first interval grooves 4 is opposite to the opening of the steel strip 1.

[0034] In practical applications, the V-shaped clamp has connecting ears at both ends of the steel strip 1. One connecting ear has a bolt 3, and the other connecting ear has a nut. A clamping plate 2 is located on the inner side of the steel strip 1. The bolt 3 and nut are threaded together. Three clamping plates 2 are welded to the inner side of the steel strip 1. The clamping plates 2 are arc-shaped with a V-shaped cross-section, and the edges of the V-shape of the clamping plates 2 are also flanged to prevent damage to the pipe when tightening it. Since the three clamping plates 2 are spaced apart, three first interval grooves 4 are naturally defined. Furthermore, to ensure that the clamp can be tightened or loosened by tightening or loosening the bolt 3 with a wrench, one of the first interval grooves 4 needs to be aligned with the opening of the steel strip 1. Since the structure of the V-shaped clamp is existing technology, it will not be described in detail further.

[0035] Please refer to the attached diagram below. Figures 2-6 A V-shaped clamp jig according to an embodiment of the present invention is described, comprising: a limiting piece 5 and an inner core 6.

[0036] The limiting piece 5 is arc-shaped. The outer wall of the limiting piece 5 is provided with a limiting block 7 and two locking blocks 8. The limiting block 7 is located between the two locking blocks 8. The inner core 6 is annular. The outer peripheral wall of the inner core 6 is provided with three protrusions 9, which are spaced apart along the circumference of the inner core 6.

[0037] Three limiting pieces 5 are spaced apart within the clamp to define three second interval grooves 10. The three limiting pieces 5 are located on the same circumference and are respectively opposite to the three first interval grooves 4. The limiting pieces 5 can move radially along the circumference to approach or move away from the corresponding first interval groove 4. Any limiting piece 5 can move to abut against the inner side of any two adjacent clamping plates 2. At this time, the limiting block 7 on the limiting piece 5 is inserted into the corresponding first interval groove 4 and clamped onto the steel strip 1. One of the two locking blocks 8 on the limiting piece 5 is locked into one clamping plate 2 and the other is locked into another clamping plate 2. The inner core 6 is movably disposed on the inner side of the clamping plate 2 along its own axial direction so that the three protrusions 9 can be inserted into or disengaged from the three second interval grooves 10 respectively. When the protrusions 9 are inserted into the second interval grooves 10, the inner core 6 abuts against all the limiting pieces 5 and the protrusions 9 abut against the adjacent limiting pieces 5.

[0038] Specifically, the limiting piece 5 in the fixture actually adopts a mimicry design; that is, the limiting piece 5, as well as the limiting block 7 and the locking block 8 on the limiting piece 5, are designed to mimic the structure of the clamp 2, in order to better adapt. To achieve automatic welding of the V-shaped clamp, this fixture needs to be used in conjunction with automated welding equipment. For example... Figure 5As shown, the automated welding equipment has a disc 14, on which three movable plates 15 are provided. The three movable plates 15 are arranged at intervals around the center of the disc 14. Each movable plate 15 can move radially along the disc 14 under the action of a driving mechanism such as a cylinder. Thus, the movement of the movable plates 15 can drive the inward and outward expansion of the three limiting plates 5. In order to facilitate the accurate placement of the limiting plates 5 on the disc 14, each movable plate 15 is also provided with two positioning pins (not shown in the figure), and the limiting plates 5 are provided with two positioning holes 16 for the positioning pins to be inserted.

[0039] The process of using this fixture is as follows:

[0040] When using this fixture, first attach the three limiting pieces 5 to the outside of the inner core 6 to form a shape like... Figure 2 The structure shown is then fitted with a V-shaped clamp with a certain degree of looseness onto the fixture, forming a shape as shown. Figure 4 The structure shown in the diagram requires that the three first interval slots 4 of the V-shaped clamp correspond to and engage with the limiting blocks 7 on the three limiting pieces 5, respectively. Then, the V-shaped clamp and the fixture are placed together on the disc 14 to form a shape as shown in the diagram. Figure 6 The structure shown has three limiting pieces 5 respectively installed on three moving plates 15, and the two positioning holes 16 of each limiting piece 5 are engaged with the two positioning pins of the corresponding moving plate 15.

[0041] After installation, the automated welding equipment first uses a robotic arm to tighten bolt 3, ensuring the V-shaped clamp is firmly attached to the fixture. Then, it is placed on a rotating welding pad for spot welding. After welding, the robotic arm loosens bolt 3, creating a degree of slack between the V-shaped clamp and the fixture. The robotic arm then removes the inner core 6 of the fixture upwards. Next, the moving plate 15 causes the limiting plate 5 to automatically retract inwards and disengage from the V-shaped clamp. The robotic arm can then remove the finished V-shaped clamp. The limiting plate 5 then automatically expands outwards, and the robotic arm lowers the inner core 6 back into the limiting plate 5 to form a combined assembly. Because the limiting plate 5 and the inner core 6 are a combined design, it facilitates the robotic arm's extension to flatten the fixture during the installation of the clamp 2 and steel strip 1, ensuring the symmetry of the steel strip 1.

[0042] In summary, this fixture, through the combination and cooperation between the limiting piece 5 and the inner core 6, and the limiting cooperation between the limiting piece 5 and the hoop 2, can ultimately provide a relatively perfect support for the inner side of the V-shaped clamp, facilitating the welding of the steel strip 1 of the V-shaped clamp and the hoop 2. Furthermore, since both the limiting piece 5 and the inner core 6 are movable, after welding is completed, the inner core 6 and the limiting piece 5 can be moved separately to remove the fixture, thus preserving the welding state of the V-shaped clamp relatively perfectly and effectively improving the finished product quality of the V-shaped clamp.

[0043] The other structures of this fixture will be described below with reference to the accompanying drawings.

[0044] In this embodiment, as Figure 1 and Figure 2 As shown, the shape of the locking block 8 matches the shape of the groove defined by the hoops 2, which makes it easier for the locking block 8 to better match the hoops 2 and avoid deformation of the hoops 2.

[0045] In this embodiment, as Figure 3 As shown, the locking block 8 and the limiting piece 5 are an integral part, and the limiting block 7 and the locking block 8 are detachably connected. Specifically, the limiting piece 5 is provided with a countersunk hole, and the limiting block 7 is provided with a threaded hole. The limiting piece 5 and the limiting block 7 are connected by countersunk screws, which facilitates the installation and removal of the limiting piece 5.

[0046] In this embodiment, as Figure 3 As shown, the inner circumferential wall of the inner core 6 is provided with three welding positioning holes 11 arranged at intervals along the circumference of the inner core 6, which facilitates the installation of the fixture onto the rotating welding pad for automatic welding of V-shaped clamps. The inner circumferential wall of the inner core 6 is also provided with anti-slip grooves 12, which facilitates the gripping and clamping of the robotic arm, prevents accidental drops, and ensures accurate positioning.

[0047] In this embodiment, the inner core 6 can move up and down along its axial direction. When the inner core 6 moves from top to bottom, it inserts between the three limiting pieces 5 and engages with them. When the inner core 6 moves from bottom to top, it disengages from the limiting pieces 5. The outer periphery of the upper surface of the limiting piece 5 has a first chamfer, and the outer periphery of the lower surface of the inner core 6 has a second chamfer. These first and second chamfers serve as guides, facilitating the reinstallation of the inner core 6 and the limiting pieces 5 into their combined state after the robotic arm removes the clamp. Specifically, the angles of both the first and second chamfers are 45 degrees.

[0048] In this embodiment, as Figure 3 and Figure 4 As shown, the limiting block 7 has a groove 13, and the steel strip 1 passes through the groove 13. Among the three first interval grooves 4, the one opposite to the opening of the steel strip 1 is the main interval groove, and the rest are secondary interval grooves. Among the three limiting blocks 7, the one that cooperates with the main interval groove is the main limiting block 7, and the rest are secondary limiting blocks 7. The two ends of the opening of the steel strip 1 and the bolt 3 are all passed through the groove 13 of the main limiting block 7. The main limiting block 7 is used to limit the opening size and left and right position of the V-shaped clamp; the secondary limiting blocks 7 are used to limit the position of the inner clamping tile 2 and to symmetrically limit the outer steel strip 1.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A special fixture for V-shaped clamps, the V-shaped clamp comprising a steel strip and clamping plates, the steel strip being C-shaped with an opening, one end of the steel strip having a bolt and the other end having a nut, the bolt being connected to the nut, and an arc-shaped clamping plate welded to the inner side of the steel strip, the clamping plate having a V-shaped cross-section, three clamping plates being arranged at intervals along the circumference of the steel strip to define three first interval grooves, one of the first interval grooves being opposite to the opening of the steel strip, characterized in that... The fixture includes: a limiting piece and an inner core; The limiting piece is arc-shaped, and a limiting block and two locking blocks are provided on the outer side wall of the limiting piece. The limiting block is located between the two locking blocks. The inner core is annular, and three protrusions are provided on the outer peripheral wall of the inner core and are spaced apart along the circumference of the inner core. Three limiting pieces are spaced apart within the clamp to define three second interval grooves. The three limiting pieces are located on the same circumference and are respectively opposite to the three first interval grooves. The limiting pieces can move radially along the circumference to approach or move away from the corresponding first interval groove. Any one of the limiting pieces can move to abut against the inner side of any two adjacent clamping plates. At this time, the limiting block on the limiting piece is inserted into the corresponding first interval groove and clamped onto the steel strip. One of the two locking blocks on the limiting piece is locked into one clamping plate and the other is locked into the other clamping plate. The inner core is movable along its own axis and is disposed inside the hoop, so that the three protrusions can be inserted into or disengaged from the three second spacer slots respectively. When the protrusion is inserted into the second spacer slot, the inner core abuts against all the limiting pieces, and the protrusion abuts against the adjacent limiting piece. The limiting piece has two spaced positioning holes; the shape of the locking block matches the shape of the groove defined by the hoop.

2. The V-shaped clamp special fixture according to claim 1, characterized in that, The card block and the limiting piece are an integral part, and the limiting block and the card block are detachably connected.

3. The V-shaped clamp special fixture according to claim 2, characterized in that, The limiting plate has a countersunk hole, and the limiting block has a threaded hole. The limiting plate and the limiting block are connected by countersunk screws.

4. The V-shaped clamp special fixture according to claim 1, characterized in that, The inner circumferential wall of the inner core is provided with three welding positioning holes arranged at intervals along the circumference of the inner core.

5. The V-shaped clamp special fixture according to claim 1, characterized in that, The inner circumferential wall of the inner core is provided with anti-slip grooves.

6. The V-shaped clamp special fixture according to claim 1, characterized in that, The inner core can move up and down along its axial direction. When the inner core moves from top to bottom, it is inserted between the three limiting pieces and cooperates with them. When the inner core moves from bottom to top, it disengages from the limiting pieces. The outer peripheral edge of the upper surface of the limiting piece is provided with a first chamfer, and the outer peripheral edge of the lower surface of the inner core is provided with a second chamfer.

7. The V-shaped clamp special fixture according to claim 1, characterized in that, The limiting block is provided with a hoop groove, and the steel strip passes through the hoop groove.

8. The V-shaped clamp special fixture according to claim 7, characterized in that, Of the three first interval slots, the one opposite to the opening of the steel strip is the main interval slot, and the rest are secondary interval slots; of the three limiting blocks, the one that cooperates with the main interval slot is the main limiting block, and the rest are secondary limiting blocks; both ends of the opening of the steel strip and the bolt are inserted into the hoop groove of the main limiting block.

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