An arc plate forming die

Abstract

The utility model relates to die technical field discloses an arc plate forming die, including base, frame, hydraulic cylinder, mounting seat, pressure head, mounting mechanism and circular arc bending mechanism, hydraulic cylinder installs in the top of frame, and output end connects mounting seat and pressure head, and circular arc bending mechanism is located below pressure head, including die block, circular arc clamp, rotating rod and spring, two semicircular circular arc clamps that rotate and connect through rotating rod are equipped in die block, and circular arc clamp cooperates spring reset, and the drive circular arc clamp closes to form the cylinder when pressure head presses down, and mounting mechanism includes spacing clamp, fixed rod and handle, and spacing clamp realizes the quick pluggable fixing of pressure head with the cooperation of fixed rod through gravity self -lock, the utility model discloses through the circular arc clamp of rotatable has realized the one -time forming of cylinder -shaped structure, and through gravity self -lock mechanism has realized the quick replacement of pressure head without tools, has improved processing efficiency and the convenience of die use.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an arc plate forming mold. Background Technology

[0002] In the field of sheet metal processing, the forming of curved plates and cylindrical workpieces is a common process requirement. Traditional forming molds usually use fixed concave dies and convex dies for stamping and bending. For simple shallow arcs, this type of fixed mold can still meet the requirements.

[0003] However, when processing near-circular or fully cylindrical workpieces, traditional fixed molds often cannot form the workpiece in one step due to difficulties in demolding and limitations in forming angle. This often requires multiple processes or complex side core-pulling mechanisms, resulting in complex mold structures and low processing efficiency. In addition, existing molds usually require changing the pressure head when dealing with different specifications of sheet metal or different curvature requirements. The existing pressure head connection methods mostly use bolt fastening, and the replacement requires the use of tools such as wrenches for disassembly and installation. The operation process is cumbersome and time-consuming, increasing the downtime of the equipment and seriously affecting the overall efficiency of the production line.

[0004] Therefore, this utility model proposes an arc-shaped plate forming mold to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology, such as the difficulty in forming cylindrical structures with arc plate forming molds, the inability to complete the forming in one go, and the low production efficiency caused by the reliance on tools and cumbersome and time-consuming operation of the pressure head replacement process, this utility model aims to provide an arc plate forming mold with an improved structure that can effectively solve the above problems.

[0006] This utility model provides an arc plate forming mold, including: a base, a frame, a hydraulic cylinder, a mounting base, a pressure head, a mounting mechanism, and an arc bending mechanism. The frame is fixedly connected to the top of the base, the hydraulic cylinder is mounted on the top of the frame, the output end of the hydraulic cylinder passes through the top of the frame and is fixedly connected to the mounting base, the pressure head is connected to the bottom of the mounting base through the mounting mechanism, and the arc bending mechanism is fixedly connected to the top of the base and located directly below the pressure head.

[0007] The arc bending mechanism includes a mold block fixed on a base. The top of the mold block has an arc groove, and two symmetrically distributed arc clamps are arranged inside the arc groove. Both arc clamps are semi-circular structures, and a rotating rod is fixedly connected to the outer bottom of each of the two arc clamps. The rotating rod is rotatably connected to a groove in the inner wall of the arc groove of the mold block. A spring is fixedly connected between the upper part of the mold block and the outer side of the arc clamp. The spring is in a stretched state. The inner walls of the two arc clamps cooperate to form a forming cavity for accommodating the pressure head, and an arc-shaped clearance space is left between the lower ends of the two arc clamps for the arc clamps to rotate around the rotating rod.

[0008] Furthermore, the base, the frame, and the hydraulic cylinder are combined by vertical fixation, the mold block and the base are combined by positioning installation, the arc clamp is connected to the mold block by the rotating rod to form a rotatable connection, and the pressure head is connected to the mounting base by the mounting mechanism to form a quick-disassembly connection.

[0009] Preferably, there are four springs, which are respectively set on the front and rear faces of the two arc clamps. One end of each spring is fixedly connected to the outer wall of the arc clamp by a hook, and the other end is fixedly connected to the outer wall of the mold block. This multi-point symmetrical arrangement can ensure that the arc clamp is subjected to uniform force during the reset process, and avoid jamming or inaccurate return caused by force on one side.

[0010] Preferably, the installation mechanism includes a mounting hole at the bottom of the mounting base and two limiting clamps rotatably connected inside the mounting base. The upper end of the pressure head is inserted into the mounting hole, and grooves are provided on both sides of the upper end of the pressure head. A fixing rod is horizontally fixedly connected in the groove. This structure uses the cooperation of the limiting clamps and the fixing rod to fix the pressure head without the need for bolt tightening, thus simplifying the installation process.

[0011] Preferably, the upper end of the limiting clamp is rotatably connected to the inner wall of the mounting base via a rotating shaft. The middle part of the limiting clamp has a fixing hole for inserting the fixing rod. The lower end of the limiting clamp has a guide slope on its inner side. The guide slope extends inclinedly from the outside to the inside, and the position of the guide slope corresponds to the path of the fixing rod inserted into the mounting hole. This slope design allows the limiting clamp to be automatically pushed open when the pressure head is inserted, thus achieving convenient installation.

[0012] Preferably, the center of gravity of the limiting clamp is offset from the vertical line of the axis of rotation, so that the limiting clamp tends to rotate inward under the action of gravity to lock the fixing rod. The mounting base has a cavity inside for the limiting clamp to rotate. This design of locking by its own gravity avoids the safety hazards caused by spring failure and improves the reliability of the mechanism.

[0013] Preferably, the mounting mechanism further includes a handle, one end of which is fixedly connected to the lower outer side of the limiting clamp, and the other end of which extends through the side wall of the mounting base to the outside. An arc-shaped groove is provided on the side wall of the mounting base for the handle to move, and the center of the arc-shaped groove coincides with the axis of the rotating shaft. The operator only needs to turn the handle to release the lock, making the disassembly process equally simple and quick.

[0014] Preferably, the pressure head is a cylindrical structure, and the outer diameter of the pressure head is adapted to the inner diameter of the circle formed after the two arc clamps are closed. The mounting base is a rectangular block structure, and the width of the mounting base is less than the distance between the two columns on both sides of the frame. The reasonable size matching ensures the forming accuracy and the operator's field of vision and operating space during equipment operation.

[0015] Preferably, the frame has an inverted U-shaped structure, and the hydraulic cylinder is vertically fixed at the center of the frame beam. This structural layout is not only stable and durable, but also enhances the versatility and ease of maintenance of the equipment.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing molds are difficult to directly process cylindrical structures by setting two semi-circular arc clamps that can rotate around an axis in the arc groove of the mold block and cooperating with a spring reset mechanism. It achieves the technical effect of automatically driving the arc clamps to close by using the power of the pressure head to perform a wrapping bending of the sheet metal to form a cylindrical shape in one step. After the forming is completed, the arc clamps can automatically reset under the spring tension, which improves the diversity and convenience of processing.

[0017] 2. This utility model solves the problem of cumbersome press head replacement process and low processing efficiency caused by the need to remove bolts with tools by setting a gravity self-locking installation mechanism including a limit clamp, a fixing rod and a handle. It achieves the technical effect of quick insertion and removal of press head without the need for additional tools. The limit clamp uses the gravitational potential energy to achieve automatic locking, which shortens the auxiliary operation time of mold switching and improves the overall production efficiency.

[0018] 3. This utility model solves the problem that the arc clamps cannot be completely closed due to mutual interference at the bottom during rotation by reserving an arc-shaped space between the bottoms of the two arc clamps and setting the rotating rod on the lower outer side of the arc clamps as a fulcrum. This achieves the effect of ensuring that the arc clamps can rotate smoothly to the predetermined angle and that the upper end can be tightly closed to cover the plate, thereby improving the accuracy and quality of cylinder forming. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an arc-shaped plate forming mold proposed in this utility model; Figure 2 This is a schematic diagram of the mold block structure of an arc plate forming mold proposed in this utility model; Figure 3 This is a schematic diagram of the pressure head part of an arc-shaped plate forming mold proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] Legend: 1. Base; 2. Frame; 3. Hydraulic cylinder; 4. Mounting seat; 5. Arc bending mechanism; 501. Die block; 502. Arc clamp; 503. Rotating rod; 504. Spring; 6. Mounting mechanism; 601. Limit clamp; 602. Rotating shaft; 603. Handle; 604. Fixing rod; 7. Press head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 4 This utility model provides an arc plate forming mold, which aims to solve the problem that the existing arc plate forming mold is difficult to directly process cylindrical structures and the process of replacing the pressure head 7 is cumbersome, resulting in low processing efficiency.

[0023] like Figure 1 and Figure 2As shown, the arc plate forming mold includes a base 1 and a frame 2 fixedly connected to the top of the base 1. A hydraulic cylinder 3 is installed on the top of the frame 2. The output end of the hydraulic cylinder 3 passes vertically downward through the top of the frame 2 and is fixedly connected to a mounting seat 4. A pressure head 7 is connected to the bottom of the mounting seat 4 through a mounting mechanism 6. An arc bending mechanism 5 is fixedly connected to the top of the base 1 and located directly below the pressure head 7. The frame 2 has an overall inverted U-shaped structure. The hydraulic cylinder 3 is vertically fixed at the center of the crossbeam of the frame 2. The mounting seat 4 is a rectangular block structure and its width is smaller than the distance between the two columns on both sides of the frame 2.

[0024] The arc bending mechanism 5 includes a mold block 501 fixed on the base 1. The top of the mold block 501 has an arc groove, inside which are two symmetrically distributed arc clamps 502. Both arc clamps 502 are semi-circular in structure. A rotating rod 503 is fixedly connected to the outer bottom of each of the two arc clamps 502. The rotating rod 503 is rotatably connected to a groove on the inner wall of the arc groove of the mold block 501, allowing the arc clamps 502 to open and close around the rotating rod 503. Four springs 504 are fixedly connected between the upper part of the mold block 501 and the outer side of the arc clamps 502. The spring 504 is fixedly connected to the outer wall of the arc clamp 502 by a hook at one end and to the outer wall of the mold block 501 at the other end. The spring 504 is in a stretched state and provides a reset force for the arc clamp 502. The inner walls of the two arc clamps 502 cooperate to form a forming cavity to accommodate the pressure head 7. In the initial state, there is an arc-shaped clearance space between the lower ends of the two arc clamps 502 for the arc clamps 502 to rotate around the rotating rod 503. The pressure head 7 adopts a cylindrical structure, and the outer diameter of the pressure head 7 is adapted to the inner diameter of the circle formed after the two arc clamps 502 are closed.

[0025] The mounting mechanism 6 includes a mounting hole at the bottom of the mounting base 4 and two limiting clamps 601 rotatably connected inside the mounting base 4. The upper end of the pressure head 7 is inserted into the mounting hole, and grooves are provided on both sides of the upper end of the pressure head 7. A fixing rod 604 is horizontally fixedly connected in the groove.

[0026] The upper end of the limiting clamp 601 is rotatably connected to the inner wall of the mounting base 4 via a rotating shaft 602. The mounting base 4 has a cavity for the limiting clamp 601 to rotate. The middle part of the limiting clamp 601 has a fixing hole for locking the fixing rod 604. The lower inner side of the limiting clamp has a guide slope that extends from the outside to the inside and its position corresponds to the path of the fixing rod 604 inserted into the mounting hole. The center of gravity of the limiting clamp 601 is designed to deviate from the vertical line of the axis of the rotating shaft 602, so that the limiting clamp 601 tends to rotate inward under the action of gravity to lock the fixing rod 604. This self-locking design that utilizes gravitational potential energy can achieve reliable locking without additional elastic components.

[0027] Meanwhile, the mounting mechanism 6 also includes a handle 603. One end of the handle 603 is fixedly connected to the lower outer side of the limiting clamp 601, and the other end extends to the outside through the side wall of the mounting base 4. An arc-shaped groove for the handle 603 to move is provided on the side wall of the mounting base 4. The center of the arc-shaped groove coincides with the axis of the rotating shaft 602. When it is necessary to disassemble the pressure head 7, the handle 603 extending to the outside of the mounting base 4 is manually turned to drive the limiting clamp 601 to rotate outward around the rotating shaft 602 against gravity, so that the fixing hole is separated from the fixing rod 604, thereby releasing the lock on the pressure head 7.

[0028] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, to ensure that the arc clamp 502 can rotate smoothly under pressure and form effective support with the mold block 501, the rotating rod 503 is fixedly connected to the lower outer side of the arc clamp 502, and the two ends of the rotating rod 503 extend out of the side of the arc clamp 502 and are embedded in the corresponding grooves in the inner wall of the arc groove of the mold block 501, forming a stable rotation fulcrum. At the same time, when the lower ends of the two arc clamps 502 are in the initial state, there is an arc-shaped space between them for rotation to avoid interference. The size of this space is calculated to ensure that the lower ends of the arc clamps 502 will not interfere with each other when they rotate to the maximum angle, thereby ensuring that the upper end can be completely closed to form a cylindrical forming cavity.

[0029] As another preferred embodiment, in order to ensure the smoothness of the pressure head 7 installation process and the reliability of locking, the guide slope at the lower end of the limiting clamp 601 is designed as a smooth transition slope. When the fixing rod 604 is inserted into the mounting hole from bottom to top, the fixing rod 604 first contacts the guide slope. As the insertion continues, the fixing rod 604 pushes the limiting clamp 601 to rotate outward around the rotating shaft 602 along the slope to avoid it, until the fixing rod 604 passes the top of the slope and enters the fixing hole area in the middle of the limiting clamp 601. At this time, the limiting clamp 601 rotates rapidly under the action of gravity, capturing and locking the fixing rod 604 in the fixing hole.

[0030] As another preferred embodiment, in order to adapt to the forming requirements of curved plates of different specifications, the frame 2 adopts an inverted U-shaped frame structure to provide sufficient operating space below. The design of the mounting base 4 being narrower than the distance between the columns on both sides of the frame 2 allows the operator to easily observe the mold alignment from the side and perform the replacement of the pressure head 7.

[0031] The working principle of this utility model's arc-shaped plate forming mold is as follows: When it is necessary to stamp the sheet metal into an arc shape, the operator first places the sheet metal object on the arc bending mechanism 5 on the base 1 above the arc groove of the mold block 501. Then, the hydraulic cylinder 3 on the frame 2 is started. The output end of the hydraulic cylinder 3 drives the mounting base 4 and the pressure head 7 connected below it to move downward. The pressure head 7 contacts the sheet metal and presses it into the arc groove of the mold block 501.

[0032] During the pressing process of the pressure head 7, differentiated operations are performed according to the required curvature. If only a conventional arc shape is required, the pressure head 7 is controlled to press down to a certain depth. If a cylindrical structure needs to be processed, the pressure head 7 is controlled to continue pressing down, so that the sheet material enters the depth of the circular groove of the mold block 501. The edge of the groove first pre-bends the material. As the material is pressed down by the pressure head 7 until it contacts the bottom of the two semi-circular arc clamps 502, the pressing force forces the two arc clamps 502 to rotate relative to each other around the rotating rod 503. The upper end of the arc clamps 502 then closes inward and squeezes and bends the material, so that it tightly covers the outer periphery of the circular pressure head 7 to form a cylindrical shape. During this process, the spring 504 connected between the arc clamps 502 and the mold block 501 is stretched. After the forming is completed, the hydraulic cylinder 3 drives the pressure head 7 to rise. The return force provided by the spring 504 pulls the arc clamps 502 to rotate in the opposite direction around the rotating rod 503 to reset, so as to remove the formed cylindrical material.

[0033] When it is necessary to replace the pressure head 7 to adapt to different processing requirements, the installation mechanism 6 can be used for quick disassembly and assembly. When installing a new pressure head 7, insert its upper end into the mounting hole at the bottom of the mounting base 4. The fixing rod 604 on the pressure head 7 contacts the guide slope at the lower end of the limit clamp 601 and pushes the limit clamp 601 to rotate outward around the rotating shaft 602 to avoid it. When the fixing rod 604 rises to the position aligned with the fixing hole, the limit clamp 601 automatically rotates under the action of gravity to lock the fixing rod 604 into the fixing hole to complete the locking. When disassembling the pressure head 7, simply manually turn the handle 603 on the side of the mounting base 4. The handle 603 moves along the arc groove and drives the limit clamp 601 to rotate outward against gravity. After releasing the fixing rod 604, the pressure head 7 can be taken out.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A molding die for forming an arc-shaped plate, comprising: The base (1) and the frame (2) fixedly connected to the top of the base (1); The hydraulic cylinder (3) is installed on the top of the frame (2), and the output end of the hydraulic cylinder (3) passes through the top of the frame (2) and is fixedly connected to the mounting base (4). The pressure head (7) is connected to the mounting base (4) via the mounting mechanism (6), and the arc bending mechanism (5) is fixedly connected to the top of the base (1) and located directly below the pressure head (7). The feature is that the arc bending mechanism (5) includes a mold block (501) fixed on the base (1), the top of the mold block (501) is provided with an arc groove, and two symmetrically distributed arc clamps (502) are provided inside the arc groove. Both arc clamps (502) are semi-circular structures, and the bottom outer side of both arc clamps (502) are fixedly connected with a rotating rod (503). The rotating rod (503) is rotatably connected to the groove opened in the inner wall of the arc groove of the mold block (501). A spring (504) is fixedly connected between the upper part of the mold block (501) and the outer side of the arc clamp (502). The spring (504) is in a stretched state. The inner walls of the two arc clamps (502) cooperate to form a forming cavity for accommodating the pressure head (7). An arc-shaped clearance space is left between the lower ends of the two arc clamps (502) for the arc clamps (502) to rotate around the rotating rod (503).

2. The arc-shaped plate forming mold according to claim 1, characterized in that, The number of springs (504) is four, which are respectively set on the front end face and the rear end face of the two arc clamps (502). One end of the spring (504) is fixedly connected to the outer wall of the arc clamp (502), and the other end is fixedly connected to the outer wall of the mold block (501).

3. The arc-shaped plate forming mold according to claim 1, characterized in that, The installation mechanism (6) includes an installation hole at the bottom of the mounting base (4) and two limiting clamps (601) rotatably connected inside the mounting base (4). The upper end of the pressure head (7) is inserted into the installation hole, and grooves are provided on both sides of the upper end of the pressure head (7). A fixing rod (604) is horizontally fixedly connected in the groove.

4. The arc-shaped plate forming mold according to claim 3, characterized in that, The upper end of the limiting clamp (601) is rotatably connected to the inner wall of the mounting base (4) via a rotating shaft (602). The middle part of the limiting clamp (601) is provided with a fixing hole for inserting the fixing rod (604). The lower end of the limiting clamp (601) is provided with a guide slope. The guide slope extends inclinedly from the outside to the inside, and the position of the guide slope corresponds to the path of the fixing rod (604) inserted into the mounting hole.

5. The arc-shaped plate forming mold according to claim 4, characterized in that, The center of gravity of the limiting clamp (601) is offset from the vertical line of the axis of the rotating shaft (602), so that the limiting clamp (601) tends to rotate inward under the action of gravity to lock the fixing rod (604). The mounting base (4) has a cavity inside for the limiting clamp (601) to rotate.

6. The arc-shaped plate forming mold according to claim 4, characterized in that, The mounting mechanism (6) also includes a handle (603), one end of which is fixedly connected to the lower outer side of the limiting clamp (601), and the other end of which extends through the side wall of the mounting base (4) to the outside. An arc-shaped groove for the handle (603) to move is provided on the side wall of the mounting base (4), and the center of the arc-shaped groove coincides with the axis of the rotating shaft (602).

7. The arc-shaped plate forming mold according to claim 1, characterized in that, The pressure head (7) is a cylindrical structure. The outer diameter of the pressure head (7) is adapted to the inner diameter of the circle formed after the two arc clamps (502) are closed. The mounting base (4) is a rectangular block structure, and the width of the mounting base (4) is smaller than the distance between the columns on both sides of the frame (2).

8. The arc-shaped plate forming mold according to claim 1, characterized in that, The frame (2) has an inverted U-shaped structure, and the hydraulic cylinder (3) is vertically fixed at the center of the crossbeam of the frame (2).

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