Combined clamp for die forging pipe joint machining

Abstract

The utility model relates to the technical field of clamps, in particular to a combined clamp for die forging pipe joint processing, which is characterized in that a lower die is fixed on a chuck, the lower die is connected with an upper die through a hinge, the upper die is provided with an upper die core through a second screw, and the lower die is provided with a lower die core through a first screw; an upper runner in the upper die core and a lower runner in the lower die core jointly form a pipe joint shape, a clamping handle is arranged on the outer side of the chuck, and the central axis of the clamping handle is located on the central axis of a cavity formed by the upper runner and the lower runner. Meanwhile, it is guaranteed that the gravity centers of the clamp and the parts are located on the central axis, high-rotating-speed cutting can be achieved, the production efficiency is greatly improved, and potential safety hazards and labor cost input are reduced.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically a combined fixture for processing die-forged pipe joints. Background Technology

[0002] Forged pipe fittings are pipe fittings made through a die forging process. They are mainly used to connect pipes and fittings, bear the pressure of the medium inside the pipe, and connect the fittings.

[0003] Since the processing and improvement of forged pipe fittings typically involve high-speed rotation, clamping is necessary to ensure that the axis of the forged pipe fitting is coaxial with the axis of rotation, preventing deviation. In existing technology, for stability, high precision, and adaptability to different clamping shanks, a four-jaw chuck is usually used for clamping. However, this method also has significant drawbacks:

[0004] First, unlike the self-centering three-jaw chuck, each jaw of a four-jaw chuck moves independently, making the calibration process complex and tedious. Each part requires individual alignment, demanding high operator skill. Second, the individual alignment of each part requires significant time for centering. Furthermore, due to the irregular shape of the pipe fitting forgings, the part's center of gravity is not on the chuck's axis, causing vibration at high speeds and potentially leading to part detachment. Therefore, machining with low speeds and low cutting depths is necessary, taking 3 to 5 times longer than machining ordinary parts. Third, since CNC lathes default to three-jaw chucks, machining pipe fittings requires switching to four-jaw chucks. Four-jaw chucks are heavy, requiring overhead cranes for disassembly and assembly, which is time-consuming, labor-intensive, and poses safety hazards. Moreover, after machining, switching back to a three-jaw chuck necessitates recalibration.

[0005] In view of the above problems, this utility model designs a combined fixture for processing die-forged pipe joints. It only uses a three-jaw chuck to clamp the shank, which not only takes advantage of the three-jaw chuck's convenient and quick workpiece clamping, but also utilizes its center of gravity on the central axis to directly increase the rotation speed and achieve the purpose of improving efficiency. In this way, the production of complex parts can be simplified, and the high skill requirements of personnel can be transferred to the mold design of die-forged pipe joints. Summary of the Invention

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a combined fixture for processing die-forged pipe joints. It only needs to hold the clamping handle with a three-jaw chuck, which not only takes advantage of the three-jaw chuck's advantages of convenient and quick workpiece clamping, but also utilizes its center of gravity on the central axis to directly increase the rotation speed and achieve the purpose of improving efficiency. In this way, the production of complex parts can be simplified, and the high skill requirements of personnel can be transferred to the mold design of die-forged pipe joints.

[0007] To achieve the above objectives, this utility model provides a combined fixture for processing die-forged pipe joints, including an upper die and a lower die. The lower die is fixed on a chuck and is connected to the upper die via a hinge. The upper die core is mounted on the upper die core via two screws, and the lower die core is mounted on the lower die core via one screw. The upper flow channel in the upper die core and the lower flow channel in the lower die core together form the shape of a pipe joint. A clamping handle is provided on the outer side of the chuck, and the central axis of the clamping handle is on the central axis of the cavity formed by the upper and lower flow channels.

[0008] The cross-sectional area of ​​the clamping plate is the same as the cross-section of the upper and lower molds combined.

[0009] The clamp handle is located on the central axis of the clamping disc.

[0010] The clamp is secured by an external three-jaw chuck.

[0011] The lower mold is provided with a shaft hole for fixing the connecting shaft.

[0012] A screw groove is provided on the inner side of the shaft hole.

[0013] The upper mold is provided with a screw groove two that corresponds to the screw groove one on the lower mold.

[0014] Compared with existing technologies, this utility model sets a mold core inside the upper and lower molds, and pre-considers and realizes the position of the central axis of the forged pipe joint in the mold core design, which greatly simplifies the subsequent centering steps. Only by merging the upper and lower molds is the central axis of the clamping shank automatically found, thereby maximizing the utilization of the rotational speed, improving work efficiency, and reducing personnel input and technical requirements. Furthermore, batch processing is convenient and fast, requiring only improvements and optimizations to the mold core, avoiding the repetitive steps in the traditional four-jaw chuck production process. In addition, since the forged pipe joint is mainly fixed by diameter and opposite sides, the naming can be changed to angle-opposite sides-diameter, facilitating one-to-one matching of drawing numbers and making management and storage easier. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the open state of this utility model.

[0016] Figure 2 This is a schematic diagram of the closed state of this utility model.

[0017] 1 Upper mold, 2 Lower mold, 3 Upper runner, 4 Lower runner, 5 Upper mold core, 6 Lower mold core, 7 Clamping plate, 8 Clamping handle, 9 Screw 1, 10 Hinge, 11 Shaft hole, 12 Screw 2, 13 Screw groove 1, 14 Screw groove 2. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] See Figures 1-2 This utility model provides a combined fixture for processing die-forged pipe joints, including an upper die 1 and a lower die 2. The lower die 2 is fixed on a chuck 7 and is connected to the upper die 1 via a hinge 10. The upper die 1 is fitted with an upper die core 5 via screw 12, and the lower die 2 is fitted with a lower die core 6 via screw 9. The upper flow channel 3 in the upper die core 5 and the lower flow channel 4 in the lower die core 6 together form the shape of a pipe joint. A clamping handle 8 is provided on the outer side of the chuck 7, and the central axis of the clamping handle 8 is on the central axis of the cavity formed by the upper flow channel 3 and the lower flow channel 4.

[0020] The cross-sectional area of ​​the clamping plate 7 is the same as the cross-section of the upper mold 1 and the lower mold 2 after they are combined.

[0021] The clamp 8 is located on the central axis of the clamp 7.

[0022] The clamp 8 is secured by an external three-jaw chuck.

[0023] The lower mold 2 is provided with a shaft hole 11 for fixing the connecting shaft.

[0024] A screw groove 13 is provided on the inner side of the shaft hole 11.

[0025] The upper mold 1 is provided with a screw groove 14 corresponding to the screw groove 13 on the lower mold 2.

[0026] Working principle:

[0027] This utility model requires no excessive adjustments during use. The lower mold 2 is fixed on the clamping plate 7, and the upper mold 1 and the lower mold 2 are connected by a hinge 10.

[0028] During machining, the chuck 8 is clamped on the three-jaw chuck of the lathe. The upper die core 5 and the lower die core 6 are selected according to the shape of the part, the dimensions of the opposite sides, and the neck diameter. Then, the lower die core 6 is fixed to the upper and lower dies respectively by screw 9 and screw 12. When the die is closed, since the connecting shaft in the shaft hole 11 is equipped with a screw rod and the screw rod is placed in the screw groove 13 and screw groove 14, the die can be closed by simply tightening the screw rod with a nut. When the die is opened, the nut is loosened so that the screw rod opens outward along the connecting shaft axis, and the die can be opened. Then, different die cores can be replaced to process the next die forging pipe joint.

[0029] The above are merely preferred embodiments of this utility model, intended only to aid in understanding the method and core concept of this application. The scope of protection of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] This invention solves the shortcomings of existing technologies that typically use four-jaw chucks, such as cumbersome centering, excessive manpower, and low efficiency. It utilizes the automatic centering feature of a three-jaw chuck, allowing the fixture to directly position the center of the part without the need for individual centering. At the same time, it ensures that the center of gravity of the fixture and the part is on the central axis, enabling high-speed cutting, significantly improving production efficiency, and reducing safety hazards and labor costs.

Claims

1. A combined fixture for swage pipe joint processing, comprising an upper die (1) and a lower die (2), characterized in that, The lower mold (2) is fixed on the chuck (7), the lower mold (2) is connected with the upper mold (1) through the hinge (10), the upper mold (1) is provided with the upper mold core (5) through the screw two (12), the lower mold (2) is provided with the lower mold core (6) through the screw one (9), the upper runner (3) in the upper mold core (5) and the lower runner (4) in the lower mold core (6) jointly form the shape of pipe joint, the outer side of the chuck (7) is provided with the clamping handle (8), the central axis of the clamping handle (8) is on the central axis of the cavity formed by the upper runner (3) and the lower runner (4).

2. The modular fixture for swage fitting machining according to claim 1, characterized in that, The cross-sectional area of the chuck (7) is the same as the cross-sectional area of the upper mold (1) and the lower mold (2) after being combined.

3. The modular fixture for swage fitting machining according to claim 1, wherein The clamping handle (8) is located on the central axis of the chuck (7).

4. The modular fixture for swage fitting machining according to claim 3, wherein The clamping handle (8) is fixed by the external three-jaw chuck.

5. The modular fixture for swage fitting machining according to claim 1, wherein, The lower mold (2) is provided with the shaft hole (11) of the fixed connection shaft.

6. The modular fixture for swage fitting machining according to claim 5, wherein, The inner side of the shaft hole (11) is provided with the screw groove one (13).

7. The modular fixture for swage fitting machining according to claim 1, wherein The upper mold (1) is provided with the screw groove two (14) corresponding to the screw groove one (13) on the lower mold (2).

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