U-shaped bent pipe machining equipment

Abstract

The utility model provides U-shaped bent pipe machining equipment, and belongs to the technical field of machinery. The problems that an existing U-shaped bent pipe machining device is high in cost and low in flexibility are solved. The U-shaped bent pipe machining equipment comprises a rack, an upper die and a lower die, the upper die and the lower die are arranged on the rack, a U-shaped forming cavity is formed after the upper die and the lower die are assembled, the two ends of the forming cavity penetrate through the side portions of the upper die and the lower die, the machining equipment further comprises a first driving source fixedly connected to the rack, and an output shaft of the first driving source is fixedly connected with two air inlet pipes; the air outlet ends of the two air inlet pipes can stretch into ports in the two ends of the forming cavity. The U-shaped bent pipe machining equipment has the advantages that the cost is reduced, and meanwhile the machining flexibility of the U-shaped bent pipe is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a U-shaped pipe bending processing equipment. Background Technology

[0002] Plastic bends are pipe fittings made by molding or machining, and are mainly used to change the direction of fluid or adapt to complex pipe layouts.

[0003] Existing equipment for processing plastic bends, such as the mold for injection molding U-shaped bends disclosed in Chinese patent literature [Patent No.: 201810600873.4; Application Publication No.: CN109049545B], includes a sliding seat movable along the mold closing direction of the moving mold, a ejector plate movable toward the movable core from between the mold-locking position and the demolding position, and a telescopic device for driving the ejector plate. The core mold includes a pair of movable cores and a pair of fixed cores. When the ejector plate moves from the mold-locking position toward the demolding position, the ejector plate extrudes the end face of the molded U-shaped bend, causing the U-shaped bend to separate from the movable cores and fixed cores.

[0004] The mold for injection molding of U-shaped pipe fittings of this type requires the installation of a movable core and a core-pulling structure that can move the movable core. This makes the mold structure complex, with a large initial investment and high cost. It is only suitable for large-volume orders. Moreover, once the mold is finalized, the bending parameters such as radius and angle are difficult to adjust, and only one type of product can be produced, resulting in low flexibility. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a U-shaped pipe bending processing equipment. The technical problem solved is how to reduce costs while improving the flexibility of U-shaped pipe bending processing.

[0006] The objective of this utility model can be achieved through the following technical solution: A U-shaped pipe bending processing equipment includes a frame and an upper mold and a lower mold disposed on the frame. After the upper mold and the lower mold are closed, they form a U-shaped forming cavity. The forming cavity is characterized in that both ends of the forming cavity penetrate the sides of the upper mold and the lower mold. The processing equipment also includes a first drive source fixedly connected to the frame. Two air inlet pipes are fixedly connected to the output shaft of the first drive source. The air outlets of the two air inlet pipes can extend into the ports at both ends of the forming cavity.

[0007] When processing long straight pipes, the extruder is very convenient. When processing U-shaped pipes, a long straight pipe with a suitable diameter is selected, and then cut to the required length. The pipe is then heated and softened, and placed in the forming cavity. The first drive source then moves two air inlet pipes, causing their outlets to extend into the ports at both ends of the forming cavity and into the ports at both ends of the softened pipe. Air is blown into the softened pipe through the two air inlet pipes, causing it to expand. Once the pipe hardens, it can be removed from the mold, completing the U-shaped bend. This processing equipment eliminates the need for a core and core-pulling mechanism, resulting in a simple structure and reduced costs. Different upper and lower dies can be selected to meet the product's requirements for bending radius and angle, improving the flexibility of U-shaped pipe processing. Furthermore, the simple structure of the upper and lower dies minimizes replacement costs.

[0008] In the aforementioned U-shaped pipe bending processing equipment, the outlet ends of both air inlet pipes have conical guide surfaces, which make the outlet ends of the air inlet pipes pointed. The guide surfaces serve a guiding function, and the pointed outlet ends of the air inlet pipes allow for better insertion into the ports at both ends of the pipe fitting, enabling the pipe fitting to inflate and expand.

[0009] In the aforementioned U-shaped pipe bending processing equipment, a long strip-shaped connecting bar is fixedly connected to the output shaft of the first drive source. One end of each of the two air inlet pipes is inserted into and fixed to both ends of the connecting bar, and an air inlet nozzle is fixedly connected to each of the two air inlet pipes. This structure facilitates the connection of the air inlet pipes, and the air inlet nozzles are connected to pipe fittings, allowing gas to enter the pipe fittings through the air inlet nozzles and air inlet pipes, resulting in a reasonable air path arrangement.

[0010] In the aforementioned U-shaped pipe bending processing equipment, the air inlet is arranged adjacent to the connecting strip. This structure can shorten the length of the air inlet pipe and is compact.

[0011] In the aforementioned U-shaped pipe bending processing equipment, both air inlet pipes are straight pipes and are parallel to each other. This structure simplifies the air inlet pipe design and reduces costs.

[0012] In the aforementioned U-shaped pipe bending processing equipment, the cavity walls at both ends of the forming cavity have annular stepped surfaces, which cause the ends of the forming cavity to be constricted. The stepped surfaces serve to support the pipe walls at the pipe ends and act as a limit, ensuring that the inner diameter of the ends of the forming cavity is smaller than the outer diameter of the pipe ends, thus preventing the pipe from falling off.

[0013] In the above-mentioned U-shaped pipe bending processing equipment, the processing equipment further includes a second drive source. The upper mold is fixedly connected to the output shaft of the second drive source, and the lower mold is fixedly connected to the frame. The upper mold is located directly above the lower mold. The bottom of the upper mold has a U-shaped upper forming groove, and the top of the lower mold has a U-shaped lower forming groove. The upper forming groove and the lower forming groove fit together to form the forming cavity.

[0014] In the aforementioned U-shaped pipe bending processing equipment, both the upper and lower dies are square. The upper die has a downwardly protruding guide block at its corner, and the lower die has a downwardly recessed guide groove at its corner. The guide block and the guide groove are arranged in a one-to-one correspondence. When the upper and lower dies are closed, the guide block is embedded in the guide groove. The guide block and guide groove serve to guide and position, preventing relative movement between the upper and lower dies, preventing deformation of the forming cavity, and improving the processing accuracy of the product.

[0015] Compared with the prior art, the U-shaped pipe bending processing equipment provided by this utility model has the following advantages:

[0016] 1. This processing equipment does not require the setting of cores and core pulling mechanisms, has a simple structure, reduces costs, and can select different upper and lower dies according to product needs to meet the product's requirements for bending radius and angle, improving the flexibility of U-shaped pipe processing. At the same time, due to the simple structure of the upper and lower dies, the replacement cost is low.

[0017] 2. The outlet end of the air inlet pipe of this processing equipment is pointed, which allows the outlet end of the air inlet pipe to be better inserted into the ports at both ends of the pipe fitting, so that the pipe fitting can be inflated and expanded, thereby improving the processing accuracy of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this processing equipment.

[0019] Figure 2 This is a schematic diagram of the overall structure of the lower mold and air inlet pipe of this processing equipment, as well as an enlarged view of a part of the structure.

[0020] Figure 3 This is a schematic diagram of the overall structure of the connecting strip and air inlet pipe of this processing equipment.

[0021] Figure 4 This is a schematic diagram of the overall structure of the mold on this processing equipment.

[0022] In the figure, 1 is the frame; 2 is the upper mold; 21 is the guide block; 3 is the lower mold; 31 is the guide groove; 4 is the forming cavity; 41 is the stepped surface; 42 is the upper forming groove; 43 is the lower forming groove; 5 is the first drive source; 6 is the air inlet pipe; 61 is the guide surface; 7 is the connecting strip; 8 is the air inlet nozzle; and 9 is the second drive source. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 As shown, this U-shaped pipe bending processing equipment includes a frame 1, an upper mold 2, a lower mold 3, a first drive source 5, an air inlet pipe 6, a connecting strip 7, an air inlet nozzle 8, and a second drive source 9.

[0025] The upper mold 2, lower mold 3, first drive source 5, and second drive source 9 are all mounted on the frame 1. The upper mold 2 is fixedly connected to the output shaft of the second drive source 9, and the lower mold 3 is fixedly connected to the frame 1. The upper mold 2 is located directly above the lower mold 3, as shown below. Figure 4 As shown, the bottom of the upper mold 2 has a U-shaped upper forming groove 42, such as... Figure 2 As shown, the top of the lower mold 3 has a U-shaped lower forming groove 43. The upper forming groove 42 and the lower forming groove 43 are fitted together to form a U-shaped forming cavity 4. Both ends of the forming cavity 4 penetrate the sides of the upper mold 2 and the lower mold 3. The cavity walls at both ends of the forming cavity 4 have annular stepped surfaces 41. The stepped surfaces 41 make the ends of the forming cavity 4 constricted.

[0026] Both the upper mold 2 and the lower mold 3 are square. The upper mold 2 has a downward protruding guide block 21 at the corner, and the lower mold 3 has a downward recessed guide groove 31 at the corner. The guide block 21 and the guide groove 31 are arranged in a one-to-one correspondence. When the upper mold 2 and the lower mold 3 are closed, the guide block 21 is embedded in the guide groove 31.

[0027] like Figure 3 As shown, a long strip-shaped connecting bar 7 is fixedly connected to the output shaft of the first drive source 5. One end of each of the two air intake pipes 6 is inserted into and fixed to both ends of the connecting bar 7. Both air intake pipes 6 are straight pipes and are parallel to each other. Each air intake pipe 6 has an air inlet 8 fixedly connected to it, and the air inlet 8 is arranged adjacent to the connecting bar 7. The air outlet ends of both air intake pipes 6 have a tapered guide surface 61, which makes the air outlet ends of the air intake pipes 6 pointed. The air outlet ends of the two air intake pipes 6 can extend into the ports at both ends of the molding cavity 4.

[0028] During processing, a pipe of appropriate length is cut, heated and softened, and placed in the lower forming groove 43. Then the mold is closed, and the first driving source 5 drives the two air inlet pipes 6 to move, so that the air outlets of the two air inlet pipes 6 extend into the ports at both ends of the forming cavity 4, and the air outlets of the two air inlet pipes 6 extend into the ports at both ends of the softened pipe. Air is blown into the softened pipe through the two air inlet pipes 6, so that the softened pipe is in an expanded state. After the pipe hardens, the mold can be opened and the U-shaped bend can be removed to complete the processing.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as frame 1, upper mold 2, guide block 21, lower mold 3, guide groove 31, molding cavity 4, stepped surface 41, upper molding groove 42, lower molding groove 43, first drive source 5, air inlet pipe 6, guide surface 61, connecting strip 7, air inlet nozzle 8, and second drive source 9, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A U-shaped pipe bending processing device, comprising a frame (1) and an upper mold (2) and a lower mold (3) disposed on the frame (1), wherein the upper mold (2) and the lower mold (3) form a U-shaped forming cavity (4) after mold closing, characterized in that, Both ends of the molding cavity (4) penetrate the sides of the upper mold (2) and the lower mold (3). The processing equipment also includes a first drive source (5) fixedly connected to the frame (1). Two air inlet pipes (6) are fixedly connected to the output shaft of the first drive source (5). The air outlets of the two air inlet pipes (6) can extend into the ports at both ends of the molding cavity (4).

2. The U-shaped pipe bending processing equipment according to claim 1, characterized in that, Both air intake pipes (6) have a tapered guide surface (61) at their outlet ends, which makes the outlet ends of the air intake pipes (6) pointed.

3. A U-shaped pipe bending processing equipment according to claim 1 or 2, characterized in that, A long strip-shaped connecting bar (7) is fixedly connected to the output shaft of the first drive source (5). One end of each of the two air intake pipes (6) is inserted into and fixed to both ends of the connecting bar (7). An air intake nozzle (8) is fixedly connected to each of the two air intake pipes (6).

4. The U-shaped pipe bending processing equipment according to claim 3, characterized in that, The air inlet (8) is arranged adjacent to the connecting strip (7).

5. A U-shaped pipe bending processing equipment according to claim 1 or 2, characterized in that, Both intake pipes (6) are straight pipes and are parallel to each other.

6. A U-shaped pipe bending processing equipment according to claim 1 or 2, characterized in that, The cavity walls at both ends of the molding cavity (4) have annular stepped surfaces (41), which make the ports at both ends of the molding cavity (4) constricted.

7. A U-shaped pipe bending processing equipment according to claim 1 or 2, characterized in that, The processing equipment also includes a second drive source (9). The upper mold (2) is fixedly connected to the output shaft of the second drive source (9). The lower mold (3) is fixedly connected to the frame (1). The upper mold (2) is located directly above the lower mold (3). The bottom of the upper mold (2) has a U-shaped upper forming groove (42). The top of the lower mold (3) has a U-shaped lower forming groove (43). The upper forming groove (42) and the lower forming groove (43) fit together to form the forming cavity (4).

8. A U-shaped pipe bending processing equipment according to claim 7, characterized in that, Both the upper mold (2) and the lower mold (3) are square. The upper mold (2) has a downward protruding guide block (21) at the corner, and the lower mold (3) has a downward recessed guide groove (31) at the corner. The guide block (21) and the guide groove (31) are arranged in a one-to-one correspondence. When the upper mold (2) and the lower mold (3) are closed, the guide block (21) is embedded in the guide groove (31).

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