A new type of pipe bending and punching tooling die

Abstract

This utility model provides a novel punching fixture for bending pipes, relating to the field of tooling technology. It includes a base plate with a guide rail parallel to its top surface; a sliding plate with a slider fixed to its bottom and slidingly engaging with the guide rail, the sliding plate being connected to the base plate via a drive mechanism for horizontal reciprocating movement; a product positioning fastener installed on the top surface of the sliding plate for horizontally fixing the bent pipe and ensuring the punched surface faces upwards; a first punching unit including a first cylinder support frame fixed to the sliding plate and a first punching cylinder mounted thereon, the punch of the first punching cylinder being vertically aligned with the workpiece area of ​​the product positioning fastener; and a second punching unit including a second cylinder support frame fixed to the base plate and a second punching cylinder mounted thereon. This utility model achieves both primary and secondary punching of the bent pipe in a single clamping operation, avoiding positioning errors caused by multiple clamping operations, significantly improving the punching position accuracy, shortening processing time, and increasing production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tooling and mold technology, and in particular to a novel tooling and mold for bending and punching pipes. Background Technology

[0002] In the context of the booming development of the refrigeration industry today, copper refrigeration pipes, as an extremely common and crucial refrigeration component, play a pivotal role in the entire refrigeration system. Their primary function is to facilitate the flow of refrigerant; the refrigerant circulates within the copper pipes, enabling heat exchange and transfer, thereby ensuring the normal and efficient operation of refrigeration equipment. Whether it's residential air conditioners, commercial refrigeration equipment, or automotive air conditioning systems, copper refrigeration pipes are indispensable.

[0003] During the manufacturing process of refrigeration copper pipes, multiple consecutive bending operations are typically required to ensure they perfectly adapt to the complex installation layout within air conditioners. This is because different air conditioners have varying internal structures and spatial arrangements, necessitating precise bending of the copper pipes to smoothly connect to the various refrigeration components and ensure unimpeded refrigerant circulation within the system. For instance, in compact small air conditioners, the copper pipes require multiple bends to fit within limited space; while in large commercial refrigeration equipment, the bending shape of the copper pipes must be carefully designed according to the overall architecture of the equipment.

[0004] After the copper tubes are bent, they often require punching. This is because in refrigeration systems, the holes on the copper tubes may be used to connect other components, install sensors, or perform specific functions. However, current processing methods have a significant problem: when punching is required, the refrigeration copper tubes must be transferred from the bending equipment to a punching machine. For example, in the gas-liquid separator of an automotive air conditioning refrigeration system, the inner bend requires punching two Φ3 and Φ2 holes in the same direction. Currently, the common practice is to perform the punching in two separate clamping operations. This method has several drawbacks. First, the operation is extremely cumbersome, requiring time for positioning and adjustment each time, increasing processing time costs. Second, because each clamping operation may have some error, it is difficult to ensure that the positions of the two clamping operations are completely consistent, resulting in difficulty in effectively guaranteeing hole accuracy. Insufficient hole accuracy may affect the connection quality between the copper tube and other components, thus affecting the performance and stability of the entire refrigeration system.

[0005] In summary, existing processing methods for refrigeration copper tubes have significant shortcomings in the punching stage, failing to meet the ever-increasing demands for production efficiency and product quality. Therefore, based on these realities, it is necessary to disclose a novel punching tooling die to overcome the problems in current processing methods, improve processing efficiency and hole position accuracy, and provide stronger technical support for the development of the refrigeration industry. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a new type of pipe bending and punching tooling, which helps to improve the positional accuracy of punching, shorten processing time, and improve production efficiency.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] A novel pipe bending and punching tooling mold includes a base plate with guide rails arranged parallel to each other on its top surface.

[0009] The skateboard has a slider fixed to its bottom that slides with the guide rail. The skateboard is connected to the base plate via a drive mechanism to achieve horizontal reciprocating movement.

[0010] The product positioning fastener is installed on the top surface of the slide plate to horizontally fix the bent pipe and make the surface to be punched face upward; the product positioning fastener has a contour positioning groove that matches the outer contour of the bent pipe.

[0011] The first punching unit includes a first cylinder support frame fixed to the slide plate and a first punching cylinder mounted thereon, wherein the punch of the first punching cylinder is vertically aligned with the workpiece area of ​​the product positioning fastener.

[0012] The second punching unit includes a second cylinder support frame fixed to the base plate and a second punching cylinder mounted thereon.

[0013] In this process, after the first punching cylinder completes the initial punching of the bent pipe, the drive mechanism drives the slide plate to move the workpiece to below the punch of the second punching cylinder to perform a secondary punching.

[0014] Furthermore, a clamping cylinder is added to the first cylinder support frame. The piston rod end of the clamping cylinder is connected to a lower pressure plate, and the lower pressure plate forms a vertical clamping station above the product positioning fastener.

[0015] Furthermore, the bottom plate is provided with an adjustable limiting component at the end away from the driving component, including an elongated adjustment groove in the bottom plate and a locking bolt passing through the elongated adjustment groove; the top of the locking bolt is connected to an adjustable limiting baffle, the position of which is adjustable along the sliding direction of the slide plate via the elongated adjustment groove.

[0016] Furthermore, the base plate surface is provided with a recessed limiting groove, and the guide rail is embedded in the limiting groove and secured by fasteners.

[0017] Furthermore, the workpiece positioning fixture is detachably mounted to the upper surface of the slide plate by bolts.

[0018] Furthermore, the bottom surface of the lower pressure plate is composited with an elastic buffer layer, the elastic buffer layer having a hardness of Shore A 50-70 degrees and a thickness of 3-5mm.

[0019] Furthermore, it also includes a side mounting plate disposed on the side of the base plate, the side mounting plate being fixed to the side wall of the base plate by a detachable connector; the lower surface of the side mounting plate is coplanar with the lower surface of the base plate, and the drive mechanism is fixedly mounted on the side of the side mounting plate.

[0020] Furthermore, the surface roughness Ra of the contour positioning groove is 0.8-1.6μm to ensure the stability of the bent pipe within the contour positioning groove.

[0021] Furthermore, a self-lubricating coating is provided between the mating surfaces of the guide rail and the slider. The coefficient of friction of the self-lubricating coating is less than 0.1, so as to improve the smoothness and stability of the slide plate sliding on the guide rail and reduce wear.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This invention allows for the initial and secondary punching of bent pipes with only one clamping, avoiding positioning errors caused by multiple clampings. This significantly improves the positional accuracy of the punching, shortens processing time, and increases production efficiency. The adjustable limit component can control the stopping position of the separation cap, adapting to the processing of bent pipes of different lengths. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a structural diagram of the product to be processed. The product includes a bent tube and a separation cap, which are fixed together for punching; and punching is required on the upper surface of the bent tube.

[0026] Figure 2 It is a three-dimensional tooling mold for bending and punching new types of pipes. Figure 1 ;

[0027] Figure 3 It is a three-dimensional tooling mold for bending and punching new types of pipes. Figure 2 ;

[0028] Figure 4This is a schematic diagram of the new type of pipe bending and punching tooling mold removing the first punching unit and the second punching unit;

[0029] Figure 5 This is a schematic diagram showing the product positioning firmware, the bend, and the separation cover in their separated states.

[0030] Figure 6 This is a schematic diagram of the adjustable limit component separated from the base plate;

[0031] Figure 7 This is a schematic diagram of the structure of the first punching unit.

[0032] In the picture:

[0033] 1. Base plate; 101. Long adjustment groove; 102. Limiting groove; 2. Guide rail; 3. Slide plate; 4. Slider; 5. Product positioning fastener; 501. Contour positioning groove; 6. First cylinder support frame; 7. First punching cylinder; 8. Second cylinder support frame; 9. Second punching cylinder; 10. Pressing cylinder; 11. Lower pressure plate; 12. Adjustable limiting component; 13. Locking bolt; 14. Side mounting plate; 15. Drive mechanism.

[0034] A. Bend; B. Separator cap. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] like Figures 1 to 7 As shown, this utility model claims protection for a novel pipe bending punching tooling mold, which is mainly used for punching pipe A. It can realize the primary and secondary punching operations of pipe A, improving the efficiency and accuracy of pipe A punching. The mold is mainly composed of a base plate 1, a sliding plate 3, a product positioning fastener 5, a first punching unit, a second punching unit, etc.

[0037] Specifically, the base plate 1 is the basic component of the entire tooling mold, and a guide rail 2 is arranged parallel to it on its top surface. In order to ensure the installation accuracy and stability of the guide rail 2, the surface of the base plate 1 is provided with a recessed limiting groove 102. The guide rail 2 is embedded in the limiting groove 102 and fixed by fasteners. This design can prevent the guide rail 2 from shifting during use and ensure the sliding accuracy of the slide plate 3. In this embodiment, the fastener is a screw.

[0038] An adjustable limiting assembly 12 is provided at the end of the base plate 1 away from the driving component, including an elongated adjusting groove 101 formed in the base plate 1 and a locking bolt 13 passing through the elongated adjusting groove 101. An adjustable limiting baffle is connected to the top of the locking bolt 13, and its position is adjustable along the sliding direction of the slide plate 3 via the elongated adjusting groove 101. Figure 1 as well as Figure 2 See, the adjustable limit baffle acts as a barrier to limit the movement of the separation cover B.

[0039] By adjusting the position of the adjustable limit baffle, the stopping position of the separation cover B can be controlled, thereby adapting to the processing requirements of bends A of different lengths.

[0040] A side mounting plate 14 is provided on the side of the base plate 1. The side mounting plate 14 is fixed to the side wall of the base plate 1 by a detachable connector, and the lower surface of the side mounting plate 14 is coplanar with the lower surface of the base plate 1. The drive mechanism 15 is fixed to the side of the side mounting plate 14. This design facilitates the installation and maintenance of the drive mechanism 15. A slider 4 is fixed to the bottom of the slide plate 3 and slides in cooperation with the guide rail 2. Through the cooperation between the slider 4 and the guide rail 2, the slide plate 3 can move horizontally back and forth on the base plate 1. In order to improve the smoothness and stability of the slide plate 3 sliding on the guide rail 2 and reduce wear, a self-lubricating coating is provided between the mating surfaces of the guide rail 2 and the slider 4. The coefficient of friction of the self-lubricating coating is less than 0.1.

[0041] The skateboard 3 is connected to the base plate 1 via the drive mechanism 15. The drive mechanism 15 can be a common drive device such as a cylinder or an electric push rod. In this embodiment, a cylinder is preferred as the drive mechanism 15 because it has the advantages of fast response speed and large thrust.

[0042] Product positioning fastener 5 is installed on the top surface of slide plate 3 to horizontally fix the bent pipe A and make the surface to be punched face upward. Product positioning fastener 5 has a contoured positioning groove 501 that matches the outer contour of the bent pipe A. The surface roughness Ra of the contoured positioning groove 501 is 0.8-1.6μm to ensure the stability of the bent pipe A within the contoured positioning groove 501. In this embodiment, the surface roughness Ra of the contoured positioning groove 501 is 1.2μm.

[0043] The workpiece positioning fixture is detachably mounted on the upper surface of the slide plate 3 by bolts. This detachable design facilitates the replacement and maintenance of the product positioning fixture 5 to adapt to the processing needs of bends A of different shapes and sizes.

[0044] The first punching unit includes a first cylinder support frame 6 fixed to the slide plate 3 and a first punching cylinder 7 mounted thereon. The punch of the first punching cylinder 7 is vertically aligned with the workpiece area of ​​the product positioning fastener 5. After the bent tube A is fixed on the product positioning fastener 5, the punch of the first punching cylinder 7 moves downward to perform the initial punching operation on the bent tube A.

[0045] To ensure the stability of the bent pipe A during the punching process, a clamping cylinder 10 is added to the first cylinder support frame 6. The piston rod of the clamping cylinder 10 is connected to a lower pressure plate 11, which forms a vertical clamping position above the product positioning fastener 5. When the lower pressure plate 11 descends, it can firmly press the bent pipe A onto the product positioning fastener 5, preventing the bent pipe A from shifting during the punching process. The bottom surface of the lower pressure plate 11 is coated with an elastic buffer layer. The hardness of the elastic buffer layer is Shore A 50-70 degrees, and the thickness is 3-5mm. The elastic buffer layer can play a buffering role, preventing the lower pressure plate 11 from damaging the bent pipe A. In this embodiment, the hardness of the elastic buffer layer is Shore A 60 degrees, and the thickness is 3.5mm.

[0046] The second punching unit includes a second cylinder support frame 8 fixed to the base plate 1 and a second punching cylinder 9 mounted thereon. After the first punching cylinder 7 completes the initial punching of the bent pipe A, the drive mechanism 15 drives the slide plate 3 to move the workpiece to below the punch of the second punching cylinder 9. The drive mechanism 15 drives the slide plate 3 to move until the separation cover B is in contact with the adjustable limit baffle, at which point it stops. At this time, the punch of the second punching cylinder 9 moves downward to perform a secondary punching operation on the bent pipe A.

[0047] The working steps of this novel pipe bending and punching tooling are as follows:

[0048] (1) Loading the bent tube A: Place the bent tube A to be processed and the separation cover B (which are connected as one piece) into the contour positioning groove 501 of the product positioning fastener 5, ensuring that the punching surface of the bent tube A faces upward.

[0049] (2) Initial punching: Start the clamping cylinder 10, and the lower pressure plate 11 descends to press the bent pipe A onto the product positioning fastener 5. Then start the first punching cylinder 7, and the punch of the first punching cylinder 7 moves downward to perform the initial punching on the bent pipe A.

[0050] (3) Secondary punching preparation: After the initial punching is completed, the piston rod of the clamping cylinder 10 rises, and the lower pressure plate 11 releases the bent tube A. The drive mechanism 15 drives the slide plate 3 to carry the workpiece along the guide rail 2 towards the second punching cylinder 9 until the bent tube A moves to below the punch of the second punching cylinder 9.

[0051] (4) Secondary punching: Start the second punching cylinder 9. The punch of the second punching cylinder 9 moves downward to punch the bent pipe A a second time.

[0052] (5) Unloading: After the secondary punching is completed, the drive mechanism 15 drives the slide plate 3 back to the initial position and removes the processed bent pipe A from the product positioning fastener 5.

[0053] This invention enables the initial and secondary punching of the bent pipe A with only one clamping, avoiding positioning errors caused by multiple clampings. This significantly improves the positional accuracy of the punching, shortens processing time, and increases production efficiency. The adjustable limit component 12 controls the stopping position of the separation cover B, adapting to the processing of bent pipes A of different lengths. The clamping cylinder 10 and elastic buffer layer of the first punching unit prevent displacement and damage to the bent pipe A, thus improving the overall processing quality and applicability of the bent pipe A.

[0054] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel pipe bending and punching tooling, characterized in that: Includes a base plate (1), on the top surface of which a guide rail (2) is arranged parallel to the plate. The slide plate (3) has a slider (4) fixed at the bottom that slides with the guide rail (2). The slide plate (3) is connected to the base plate (1) through the drive mechanism (15) to achieve horizontal reciprocating movement. The product positioning fastener (5) is installed on the top surface of the slide plate (3) to horizontally fix the bent pipe (A) and make the punching surface face upward; the product positioning fastener (5) has a contour positioning groove (501) that matches the outer contour of the bent pipe (A). The first punching unit includes a first cylinder support frame (6) fixed to the slide plate (3) and a first punching cylinder (7) mounted thereon, wherein the punch of the first punching cylinder (7) is vertically aligned with the workpiece area of ​​the product positioning fastener (5). The second punching unit includes a second cylinder support frame (8) fixed to the base plate (1) and a second punching cylinder (9) mounted thereon. After the first punching cylinder (7) completes the initial punching of the bent pipe (A), the drive mechanism (15) drives the slide plate (3) to move the workpiece to the punch of the second punching cylinder (9) to perform the secondary punching.

2. The novel pipe bending and punching tooling according to claim 1, characterized in that: A pressing cylinder (10) is added to the first cylinder support frame (6). The piston rod end of the pressing cylinder (10) is connected to the lower pressure plate (11). The lower pressure plate (11) forms a vertical pressing station above the product positioning fastener (5).

3. The novel pipe bending and punching tooling according to claim 2, characterized in that: An adjustable limiting assembly (12) is provided at one end of the base plate (1) away from the driving component, including an elongated adjustment groove (101) opened on the base plate (1) and a locking bolt (13) passing through the elongated adjustment groove (101); the top of the locking bolt (13) is connected to an adjustable limiting baffle, the position of which is adjustable along the sliding direction of the slide plate (3) via the elongated adjustment groove (101).

4. The novel pipe bending and punching tooling according to claim 1, characterized in that: The base plate (1) has a recessed limiting groove (102) on its surface, and the guide rail (2) is embedded in the limiting groove (102) and fixed by fasteners.

5. The novel pipe bending and punching tooling according to claim 1, characterized in that: The product positioning fastener (5) is detachably installed on the upper surface of the slide plate (3) by bolts.

6. The novel pipe bending and punching tooling according to claim 3, characterized in that: The bottom surface of the lower pressure plate (11) is composite with an elastic buffer layer, the hardness of which is Shore A 50-70 degrees and the thickness is 3-5mm.

7. The novel pipe bending and punching tooling according to claim 1, characterized in that: It also includes a side mounting plate (14) disposed on the side of the base plate (1), the side mounting plate (14) being fixed to the side wall of the base plate (1) by a detachable connector; the lower surface of the side mounting plate (14) is coplanar with the lower surface of the base plate (1), and the drive mechanism (15) is fixedly mounted on the side of the side mounting plate (14).

8. The novel pipe bending and punching tooling according to claim 1, characterized in that: The surface roughness Ra of the contour positioning groove (501) is 0.8-1.6μm to ensure the stability of the bent pipe (A) within the contour positioning groove (501).

9. The novel pipe bending and punching tooling according to claim 1, characterized in that: A self-lubricating coating is provided between the mating surfaces of the guide rail (2) and the slider (4). The coefficient of friction of the self-lubricating coating is less than 0.1, so as to improve the smoothness and stability of the sliding plate (3) on the guide rail (2) and reduce wear.

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