Arc-shaped plate processing fixture

Abstract

The application discloses a circular-arc plate machining clamp, which comprises a base, arc-shaped supports, a turnover limiting structure and end-side clamping blocks. The top of the base is provided with a pair of mounting lugs, and each mounting lug is provided with an arc-shaped support. The arc-shaped support has a semicircular supporting part, and the inner side arc surface of the semicircular supporting part forms an arc-shaped supporting surface for supporting the outer side arc surface of a circular-arc plate blank. The outer side of the semicircular supporting part is provided with an outwardly protruding connecting lug. The mounting lug and the connecting lug are provided with an assembly hole arranged opposite to each other, and a pin shaft is arranged in the assembly hole to enable the arc-shaped support to be turned over. The turnover limiting structure is used for limiting and retaining the opening of the semicircular supporting part of the arc-shaped support when the opening is vertically upward or horizontally oriented. At least two end-side clamping blocks are detachably fixed and arranged at intervals on the axial outer side surface of the semicircular supporting part of each arc-shaped support, and each end-side clamping block is used for abutting, limiting and clamping the axial end of the circular-arc plate blank.

Description

Technical Field

[0001] This invention belongs to the field of arc-shaped plates, and specifically relates to a jig for processing arc-shaped plates. Background Technology

[0002] In existing technologies, the machining of relatively large arc-shaped plate blanks with a thickness of 5-35mm and a length of 0.5-2 meters generally faces the following unresolved technical challenges:

[0003] Due to their heavy weight and easily movable sidewalls, arc-shaped plate blanks are prone to unpredictable deformation during clamping, making it difficult to achieve consistent clamping and fixing effects. This makes it difficult to ensure the consistency of subsequent machining quality and to meet the design requirements for machining surfaces and precision.

[0004] Therefore, it is urgent to design a technical solution to solve the above technical problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a machining fixture for arc-shaped plates that can better ensure clamping consistency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A jig for processing arc-shaped plates, characterized in that it includes a base, an arc-shaped support, a flipping and limiting structure, and an end-side clamping block;

[0008] The top of the base has a pair of parallel and upward-protruding mounting lugs, and each mounting lug is rotatably mounted with an arc-shaped bracket;

[0009] The arc-shaped bracket has a semi-circular support portion, the inner arc surface of which forms an arc-shaped support surface for supporting the outer arc surface of the arc-shaped plate blank; the outer side of the semi-circular support portion has an outwardly protruding connecting lug; there is an opposite mounting hole between the mounting lug and the connecting lug, and a pin is installed in the mounting hole to allow the arc-shaped bracket to be flipped.

[0010] The flip-limiting structure is used to limit and retain the opening of the semi-circular support of the arc-shaped bracket when it is in one of two positions: vertically upward or horizontal.

[0011] At least two end-side clamping blocks are detachably and fixedly provided on the axial outer side of the semi-circular support portion of each arc-shaped bracket. Each end-side clamping block is used to form an abutment limit and clamping on the axial end of the arc-shaped plate blank.

[0012] Compared with existing technologies, the use of the arc-shaped plate processing fixture in this technical solution and its advantages are as follows:

[0013] First, the semi-circular support of a pair of arc-shaped brackets installed on the base can form a limiting retention when it is in either a vertically upward or horizontal position. In this way, even when the "vertically upward" position is used for placing the arc-shaped plate blank, the arc-shaped plate blank unfolds under the action of gravity and fits against the inner arc surface of the semi-circular support to achieve initial positioning.

[0014] Subsequently, the end-side clamping blocks can be used to abut and clamp the axial end face of the arc-shaped plate blank on the arc-shaped bracket, so that the machined end face of the arc-shaped plate blank in the arc direction is fully exposed.

[0015] Finally, flip the semi-circular support parts of the pair of arc-shaped brackets to face horizontally and form a limiting retention, and then use the cutting tools of the horizontal machining center to process the end face.

[0016] As can be seen from the above, the above-mentioned arc-shaped plate machining fixtures can ensure that the arc-shaped plate blanks have a consistent clamping posture, thereby better ensuring the consistency of machining quality after clamping and meeting the design requirements for machining surface and machining accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the arc-shaped plate machining fixture in this technical solution.

[0018] Figure 2 This is a schematic diagram of the arc-shaped plate machining fixture in this technical solution.

[0019] Figure 3 This is a schematic diagram of the arc-shaped plate machining fixture in this technical solution.

[0020] Figure 4 for Figure 3 Enlarged view of section I (first stage clamping completed).

[0021] Figure 5 This is a schematic diagram of the arc-shaped plate machining fixture in this technical solution (first machining operation state).

[0022] Figure 6 This is a schematic diagram of the arc-shaped plate machining fixture in this technical solution (second machining state). The diagram is marked as follows:

[0023] A. Arc-shaped plate blank: A1. Machining end face in the axial direction; A2. Machining end face in the arc direction.

[0024] B Base: B1 Mounting lug, B2 Support plate, B3 Connecting rod

[0025] C-shaped bracket: C1 semi-circular support, C2 connecting lug, C3 pin.

[0026] D-end side clamping block: D1 mounting part (D11 locking washer), D2 clamping part (D21 connecting post, D22 threaded hole) flipping limit structure: E1 vertically facing upper limit retaining hole, E2 vertically facing upward locking pin, E3 facing horizontal limit retaining hole, E4 facing horizontal locking pin.

[0027] Second process fixtures: F1 clamping parts for the second process (F11 fixed beam, F12 arc block, F13 reinforcing connecting block, F14 clamping pad), F2 pads for the second process (F21 countersunk hole, F22 radial threaded hole). Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] A jig for machining arc-shaped plates, including a base, an arc-shaped support, a flipping and limiting structure, and end-side clamping blocks;

[0030] The top of the base has a pair of parallel and upward-protruding mounting lugs, and each mounting lug is rotatably mounted with an arc-shaped bracket;

[0031] The arc-shaped bracket has a semi-circular support portion, the inner arc surface of which forms an arc-shaped support surface for supporting the outer arc surface of the arc-shaped plate blank; the outer side of the semi-circular support portion has an outwardly protruding connecting lug; there is an opposite mounting hole between the mounting lug and the connecting lug, and a pin is installed in the mounting hole to allow the arc-shaped bracket to be flipped.

[0032] The flip-limiting structure is used to limit and retain the opening of the semi-circular support of the arc-shaped bracket when it is in one of two positions: vertically upward or horizontal.

[0033] At least two end-side clamping blocks are detachably and fixedly provided on the axial outer side of the semi-circular support portion of each arc-shaped bracket. Each end-side clamping block is used to form an abutment limit and clamping on the axial end of the arc-shaped plate blank.

[0034] Compared with existing technologies, the use of the arc-shaped plate processing fixture in this technical solution and its advantages are as follows:

[0035] First, the semi-circular support of a pair of arc-shaped brackets installed on the base can form a limiting retention when it is in either a vertically upward or horizontal position. In this way, even when the "vertically upward" position is used for placing the arc-shaped plate blank, the arc-shaped plate blank unfolds under the action of gravity and fits against the inner arc surface of the semi-circular support to achieve initial positioning.

[0036] Subsequently, the end-side clamping blocks can be used to abut and clamp the axial end face of the arc-shaped plate blank on the arc-shaped bracket, so that the machined end face of the arc-shaped plate blank in the arc direction is fully exposed.

[0037] Finally, flip the semi-circular support parts of the pair of arc-shaped brackets to face horizontally and form a limiting retention, and then use the cutting tools of the horizontal machining center to process the end face.

[0038] As can be seen from the above, the above-mentioned arc-shaped plate machining fixtures can ensure that the arc-shaped plate blanks have a consistent clamping posture, thereby better ensuring the consistency of machining quality after clamping and meeting the design requirements for machining surface and machining accuracy.

[0039] Each of the end-side clamping blocks has a mounting portion and a clamping portion;

[0040] The mounting part is detachably fixedly connected to the axial outer side of the semi-circular support part of the arc-shaped bracket by screws.

[0041] The clamping part is in the shape of a U-shape. The bottom of the U-shape is fixedly connected to the mounting part. The opening of the U-shape is used for the axial end of the arc-shaped plate blank to be inserted. The closed side of the U-shape facing the opening is used to form an abutment limit on the axial end face of the arc-shaped plate blank.

[0042] The top of the C-shaped structure has a threaded hole for connecting the threaded section of a clamping screw. The clamping screw is used to press against the inner side of the axial end of the arc-shaped plate blank and together with the bottom of the C-shaped structure, it clamps the axial end of the arc-shaped plate blank.

[0043] The above end-side clamping blocks are detachably connected to the arc-shaped bracket through the mounting part. During the assembly and connection of the mounting part of the end-side clamping blocks, the closed side of the clamping part facing the opening can be used to abut and limit the axial end face of the arc-shaped plate blank, thereby realizing the adjustment and positioning of the clamping position.

[0044] Finally, by installing clamping screws in the clamping parts of each end clamping block, the arc-shaped plate blank on the arc-shaped bracket can be clamped and locked.

[0045] As can be seen from the above, the upper side clamp has the advantages of being easy to use and having good limiting and positioning effects.

[0046] In the structure of each end-side clamp: a protruding connecting post is fixedly provided at the middle of the bottom outer side of the U-shaped structure, and the cross-section of the connecting post is trapezoidal; the corresponding mounting part has a mounting hole for inserting the connecting post, and the cross-section of the mounting hole is also trapezoidal.

[0047] After the connecting post is inserted into the mounting hole, a gap is formed. A locking washer is inserted into the gap to lock the connecting post into the mounting hole.

[0048] By adopting the above structure, the mounting part and the clamping part in the structure of each end-side clamping block can be detachably connected. The advantage of this is:

[0049] 1. The cross-sections of both the connecting column and the mounting hole are trapezoidal. This not only has the advantages of a large contact area and more uniform and reasonable force distribution, but also effectively prevents the incorrect installation of the connecting column through the trapezoidal cross-section, ensuring correct assembly and assembly efficiency.

[0050] 2. The separate mounting and clamping parts have more streamlined structures, making it easier for each part to be machined with high precision independently. In addition, a set of mounting parts can be used in conjunction with clamping parts of various sizes, thereby adapting to a wider range of arc-shaped plate blanks, reducing processing costs and improving processing efficiency.

[0051] The base includes two support plates and a connecting rod;

[0052] The two support plates are each triangular block structure and are arranged side by side at intervals in their own thickness direction. A connecting rod is fixedly connected to each of the three vertices of the triangular block structure of the two support plates by screws.

[0053] The top of the triangular block structure of the two support plates constitutes the pair of mounting lugs.

[0054] The advantages of the above bases are:

[0055] 1. Uses less material, is lighter, has a simpler structure, and is easier to manufacture;

[0056] 2. As it has a detachable structure, it is easy to process connecting rods of any length to adapt to arc-shaped plate blanks with more shaft lengths, thus having better practicality.

[0057] The flip-limiting structure includes a vertically upward limit retaining hole, a vertically upward locking pin, a horizontally upward limit retaining hole, and a horizontally upward locking pin.

[0058] The top of each of the two support plates has a triangular block structure and a connecting lug of the vertically upward arc-shaped bracket. The vertically upward upper limit retaining hole is provided through the first axially overlapping part. The vertically upward locking pin is used to be inserted into the vertically upward upper limit retaining hole to limit and retain the opening of the semi-circular support part of the arc-shaped bracket in the vertical direction.

[0059] The two support plates each have a second axial overlap between one of the hypotenuses of their triangular block structure and the horizontally oriented semicircular support portion. The horizontally oriented limiting and retaining hole is provided through the second axially overlapping portion. The horizontally oriented locking pin is used to be inserted into the horizontally oriented limiting and retaining hole to limit and retain the opening of the semicircular support portion of the arc-shaped bracket in the horizontal direction.

[0060] The above-mentioned flip-limiting structure has the advantages of being easy to process and simpler to use.

[0061] In practice, it is preferable that the adjacent arc-shaped bracket in the triangular block structure of each of the two support plates has an arc-shaped side that can coincide with the semi-circular support when the semi-circular support is facing horizontally; at least three horizontally oriented limiting and retaining holes are provided at intervals along the arc-shaped side.

[0062] In this way, not only can the overall size of the fixture be reduced and the compactness improved through the arc-shaped edge structural design, but also the support reliability of the semi-circular support opening of the arc-shaped bracket when it is oriented horizontally can be improved through the setting of multiple horizontally oriented limiting and retaining holes, effectively ensuring machining accuracy.

[0063] After completing the first processing step, the semi-circular support of the adjustable arc-shaped bracket is once again positioned vertically upward to insert the fixture for the second processing step, thus preparing for the second processing step.

[0064] The arc-shaped plate processing fixture also includes a second process fixture, wherein the second tool fixture includes a clamping element for the second process and a pad for the second process.

[0065] The clamping component used in the second process is used to cooperate with the arc-shaped bracket in a one-to-one manner; the top of the clamping component used in the second process has a strip-shaped fixing beam, and the two ends of the fixing beam in the length direction are used to be fixedly connected to the two ends of the arc direction of the semi-circular support by screws; the lower side of the middle part of the fixing beam in the length direction has an arc-shaped clamping surface, and the arc-shaped clamping surface is used to press against the inner arc surface of the arc-shaped plate blank;

[0066] The arc-shaped support portion of the arc-shaped bracket has multiple second-process pads fixedly installed at intervals along the arc direction on the arc-shaped support surface. Each second-process pad has a countersunk hole on the surface of the arc-shaped support surface. The semi-circular support portion has a radial threaded hole that is directly opposite the countersunk hole. An adjusting screw is threaded into the radial threaded hole. The adjusting screw passes through the radial threaded hole and its inner radial end presses against the countersunk hole, while its outer radial end forms an adjustment end.

[0067] In practice, it is preferable that a plurality of pressing pads are spaced apart on the arc-shaped pressing surface of the pressing member in the second process. The pressing pads are used to press against the inner arc surface of the arc-shaped plate blank to achieve locking.

[0068] In practice, the thickness of the pad used in the second process is less than the bottom thickness of the C-shaped structure of the mounting part of the end-side clamping block.

[0069] After using the above second-process fixture, when in use:

[0070] First, fix the fixed beam to the arc-shaped bracket;

[0071] Next, a second-process shim is inserted into the gap between the arc-shaped support surface of the semi-circular support part of the arc-shaped bracket and the outer arc-shaped surface of the arc-shaped plate blank. Then, each adjusting screw is adjusted in sequence to press against the bottom of the countersunk hole of the second-process shim, thereby achieving clamping and locking of the arc-shaped plate blank.

[0072] Next, remove the end clamps to fully expose the axial end of the arc-shaped plate blank.

[0073] Finally, the axial ends of the arc-shaped plate blank can be machined.

[0074] As can be seen from the above, the second process fixture can make full use of the structure of the arc-shaped bracket to achieve reliable clamping and fixing effect and high clamping efficiency. At the same time, it makes the coordinate system of the first process and the second process of the arc-shaped plate blank consistent. Therefore, there is no need to recalibrate the machining coordinate system due to the switching of the two processes. This avoids the accumulation of machining errors and also helps to improve machining clamping efficiency and ensure machining accuracy.

[0075] In the second process, the arc-shaped pressing surface on the pressing component is formed on the lower side of an arc-shaped block. The two ends of the arc-shaped block are fixedly connected to the fixed beam in the arc direction, and a reinforcing connecting block is fixedly connected between the middle position of the arc-shaped block and the fixed beam.

[0076] The clamping component used in the second process of the above structure has the advantages of high structural strength, less material consumption, and lighter weight.

[0077] In the second process, the pad block and the end-side clamp block are offset from each other in the arc direction of the semi-circular support.

[0078] In this way, after the first processing step is completed, it is not necessary to flip the semi-circular support part of the arc-shaped bracket to face vertically; the arc-shaped plate blank can be clamped by the end-side clamping blocks simultaneously.

[0079] Install the clamping parts and shims for the second process directly. After the clamping parts and shims for the second process have clamped the arc-shaped plate blank, remove the end clamps. Then, the second process can be carried out.

[0080] As can be seen from the above, by adopting the above technical features, the clamping and switching efficiency between the first and second processes can be further improved.

[0081] The above are merely preferred embodiments of the present invention. It should be noted that any modifications and improvements made by those skilled in the art without departing from the present technical solution should also be considered to fall within the scope of protection claimed in this claim.

Claims

1. A jig for machining arc-shaped plates, characterized in that, Includes a base, an arc-shaped bracket, a flip-limiting structure, and end-side clamps; The top of the base has a pair of parallel and upward-protruding mounting lugs, and each mounting lug is rotatably mounted with an arc-shaped bracket. The arc-shaped bracket has a semi-circular support portion, the inner arc surface of which forms an arc-shaped support surface for supporting the outer arc surface of the arc-shaped plate blank; the outer side of the semi-circular support portion has an outwardly protruding connecting lug; there is an opposite mounting hole between the mounting lug and the connecting lug, and a pin is installed in the mounting hole to allow the arc-shaped bracket to be flipped. The flip-limiting structure is used to limit and retain the opening of the semi-circular support of the arc-shaped bracket when it is in one of two positions: vertically upward or horizontal. At least two end-side clamping blocks are detachably and fixedly provided on the axial outer side of the semi-circular support portion of each arc-shaped bracket. Each end-side clamping block is used to form abutment limit and clamping on the axial end of the arc-shaped plate blank. Each of the end-side clamping blocks has a mounting portion and a clamping portion; The mounting part is detachably fixedly connected to the axial outer side of the semi-circular support part of the arc-shaped bracket by screws. The clamping part is in the shape of a U-shape. The bottom of the U-shape is fixedly connected to the mounting part. The opening of the U-shape is used for the axial end of the arc-shaped plate blank to be inserted. The closed side of the U-shape facing the opening is used to form an abutment limit on the axial end face of the arc-shaped plate blank. The top of the gui-shaped structure is vertically perforated with a threaded hole for connecting the threaded section of a clamping screw. The clamping screw is used to press against the inner side of the axial end of the arc-shaped plate blank and together with the bottom of the gui-shaped structure, it clamps the axial end of the arc-shaped plate blank. In the structure of each end-side clamp: a protruding connecting post is fixedly provided at the middle of the bottom outer side of the U-shaped structure, and the cross-section of the connecting post is trapezoidal; the corresponding mounting part has a mounting hole for inserting the connecting post, and the cross-section of the mounting hole is also trapezoidal. After the connecting post is inserted into the mounting hole, a gap is formed. A locking washer is inserted into the gap to lock the connecting post into the mounting hole.

2. The arc-shaped plate processing fixture according to claim 1, characterized in that, The base includes two support plates and a connecting rod; The two support plates are each triangular block structure and are arranged side by side at intervals in their own thickness direction. A connecting rod is fixedly connected to each of the three vertices of the triangular block structure of the two support plates by screws. The top of the triangular block structure of the two support plates constitutes the pair of mounting lugs.

3. The arc-shaped plate processing fixture according to claim 2, characterized in that, The flip-limiting structure includes a vertically upward limit retaining hole, a vertically upward locking pin, a horizontally upward limit retaining hole, and a horizontally upward locking pin. The top of each of the two support plates has a triangular block structure and a connecting lug of the vertically upward arc-shaped bracket. The vertically upward upper limit retaining hole is provided through the first axially overlapping part. The vertically upward locking pin is used to be inserted into the vertically upward upper limit retaining hole to limit and retain the opening of the semi-circular support part of the arc-shaped bracket in the vertical direction. The two support plates each have a second axial overlap between one of the hypotenuses of their triangular block structure and the horizontally oriented semicircular support portion. The horizontally oriented limiting and retaining hole is provided through the second axially overlapping portion. The horizontally oriented locking pin is used to be inserted into the horizontally oriented limiting and retaining hole to limit and retain the opening of the semicircular support portion of the arc-shaped bracket in the horizontal direction.

4. The arc-shaped plate machining fixture according to any one of claims 1 to 3, characterized in that, It also includes a second process fixture, which includes a clamping element for the second process and a pad for the second process; The clamping component used in the second process is used to cooperate with the arc-shaped bracket in a one-to-one manner; the top of the clamping component used in the second process has a strip-shaped fixing beam, and the two ends of the fixing beam in the length direction are used to be fixedly connected to the two ends of the arc direction of the semi-circular support by screws; the lower side of the middle part of the fixing beam in the length direction has an arc-shaped clamping surface, and the arc-shaped clamping surface is used to press against the inner arc surface of the arc-shaped plate blank; The arc-shaped support portion of the arc-shaped bracket has multiple second-process pads fixedly installed at intervals along the arc direction on the arc-shaped support surface. Each second-process pad has a countersunk hole on the surface of the arc-shaped support surface. The semi-circular support portion has a radial threaded hole that is directly opposite the countersunk hole. An adjusting screw is threaded into the radial threaded hole. The adjusting screw passes through the radial threaded hole and its inner radial end presses against the countersunk hole, while its outer radial end forms an adjustment end.

5. The arc-shaped plate processing fixture according to claim 4, characterized in that, In the second process, the arc-shaped pressing surface on the pressing component is formed on the lower side of an arc-shaped block. The two ends of the arc-shaped block are fixedly connected to the fixed beam in the arc direction, and a reinforcing connecting block is fixedly connected between the middle position of the arc-shaped block and the fixed beam.

6. The arc-shaped plate processing fixture according to claim 4, characterized in that, In the second process, the pad block and the end-side clamp block are offset from each other in the arc direction of the semi-circular support.

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