Bent pipe clamping device for pipe bending machine

Abstract

The utility model discloses a bent pipe clamping device for a pipe bender, which relates to the technical field of pipe fitting processing and comprises a rack, a fixed die and a pipe bending die are arranged on the front surface of the rack, one end of the fixed die and one end of the pipe bending die are fixedly connected with fixed shaft rods, the fixed shaft rods are fixedly connected onto the rack, and the fixed shaft rods are fixedly connected onto the rack. A rotating support is rotationally connected to a fixing shaft rod of the pipe bending die, a pipe bending rotation driving unit used for driving the rotating support to rotate is arranged on the rack, a bending structure is arranged on the inner side of the rotating support, and the bending structure comprises a hydraulic rod and a bending clamp fixedly connected to the power output end of the hydraulic rod. According to the fixing clamp, the pipe fitting is clamped through the bending action of the linkage bending structure, the pipe fitting is clamped in the mode, a traditional hydraulic driving clamping mechanism is effectively replaced, meanwhile, the fixing clamp is in linkage with the bending action, the cost of a pipe bending machine is effectively reduced, and meanwhile the pipe fitting bending machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe processing, and more specifically, to a pipe bending clamping device used for a pipe bending machine. Background Art

[0002] Pipe fittings are common tools for transporting liquids, gases and other materials in our daily life. They are widely used because of their simple structure and perfect ability to control variables, divert flow, seal and other functions. In order to allow pipe fittings to be used in various occasions with complex terrain, pipes with different degrees of bending are required to be matched with each other. Metal pipe fittings can be bent to different degrees by pipe bending machines in the later processing to form pipe fittings with preset bending structures. When the pipe bending machine processes pipe fittings, a clamping mechanism is required to fix the pipe fittings.

[0003] Patent No. CN 211965488 U discloses a multi-station pipe bending device. An elbow assembly is provided on the top of the frame, and a rotating drive mechanism is provided at the bottom thereof. The elbow assembly includes a rotating fixture, a rotating frame and a first pressing mechanism. A pipe bending groove is provided on the outer side of the rotating fixture, a fixed fixture is provided on one side of the elbow assembly, a positioning groove is provided on one side of the fixed fixture, a telescopic member is provided on the rotating frame, a convex block is provided on the top of the rotating fixture, and the rotating fixture blocks the arc portion and the straight portion. The steel pipe is positioned by the positioning groove and the pipe bending groove. After the steel pipe is fixed to the rotating fixture by the first pressing mechanism, the rotating drive mechanism drives the elbow assembly to bend the steel pipe, and multiple steel pipes can be bent at the same time, which is more efficient. The convex block is tightened by the telescopic member to fix the rotating fixture, which is more stable during processing. The convex block is loosened by the telescopic member to make the rotating fixture movable, which is convenient for removing the steel pipe. The L-shaped clamp is clamped on the edge portion, and the steel pipe is pressed to the positioning groove by the second pressing mechanism to prevent the steel pipe from shifting.

[0004] In the above patent, the inventor believes that when the pipe is bent, the fixing fixture used to fix the pipe is driven by an independent hydraulic device to clamp the pipe. Although this method meets the stability of the pipe bending process, the hydraulic equipment is a wearing part, and the structural cost and maintenance cost are relatively high. In addition, there is a lack of linkage between the clamping control and the bending control, which increases the difficulty of operating the pipe bending machine control system. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a bending clamping device for a pipe bending machine. The technical problem to be solved by the utility model is: the bending clamping mechanism in the current pipe bending machine is mostly driven by an independent hydraulic device to clamp and fix the pipe. The hydraulic device is a wearing part, and the structural cost and maintenance cost are relatively high, and the linkage with the bending control is insufficient.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bending tube clamping device for a tube bending machine, comprising a frame, a fixed die and a tube bending die are arranged on the front surface of the frame, one end of each of the fixed die and the tube bending die is fixedly connected to a fixed shaft rod, the fixed shaft rod is fixedly connected to the frame, a rotating support is rotatably connected to the fixed shaft rod of the tube bending die, a tube bending rotation driving unit for driving the rotating support to rotate is arranged on the frame, a bending structure is arranged on the inner side of the rotating support, and the bending structure comprises a hydraulic rod and a fixedly connected to the power output end of the hydraulic rod. A bending fixture, a fixing fixture is arranged above the fixed die, a pre-tightening and pressing structure is arranged on the frame, the fixing fixture is fixedly connected to the pre-tightening and pressing structure, one end of the bending fixture is fixedly connected to a push rod, the push rod movably passes through the rotating support and extends backward; when a pipe fitting is arranged on the fixed die and the push rod is movably connected to the pre-tightening and pressing structure, the fixing fixture is located above the pipe fitting; or, when a pipe fitting is arranged on the fixed die and the push rod is disengaged from the pre-tightening and pressing structure, the fixing fixture clamps the pipe fitting on the fixed die.

[0007] In a preferred embodiment, an assembly plate is fixedly connected to the end side of the frame, a fixed pipe groove is provided on the fixed mold, a bent pipe groove is provided on the bending mold, a first pipe groove matching the fixed pipe groove is provided on the fixing fixture, and a second pipe groove matching the bent pipe groove is provided on the bending fixture.

[0008] In a preferred embodiment, the bent pipe rotation drive unit includes a rotating motor fixedly connected to the rear surface of the frame, a main gear fixedly connected to the power output end of the rotating motor, and a sub-gear meshingly connected to the main gear; the main gear is located at the front surface position of the frame, and the sub-gear is fixedly connected to the end side position of the rotating support.

[0009] In a preferred embodiment, the fixed shaft of the tube bending die movably passes through the auxiliary gear.

[0010] In a preferred embodiment, the pre-tightening and pressing structure includes a fixing plate fixedly connected to the front surface of the frame, a pair of telescopic rods fixedly connected to the bottom of the fixing plate, a tensioning spring sleeved on each telescopic rod, a pressing plate fixedly connected to the pair of telescopic rods, and a fixed pressing block fixedly connected to one end of the pressing plate;

[0011] An arc-shaped plate is integrally provided at one end of the pressing plate;

[0012] The fixing clamp is fixedly connected to the fixing pressing block.

[0013] In a preferred embodiment, a telescopic slot is provided on the side of the rotation support, and the push rod is slidably connected in the telescopic slot and extends backward.

[0014] In a preferred embodiment, when a pipe fitting is provided on the fixed mold and the push rod is movably connected to the pressing plate, the fixing fixture is located above the pipe fitting;

[0015] Alternatively, when a pipe fitting is disposed on the fixed die and the push rod is separated from the pressing plate, the fixing fixture clamps the pipe fitting on the fixed die.

[0016] Technical effects and advantages of the utility model:

[0017] The utility model discloses that when the bending structure is bending the pipe fitting on the pipe bending die, the bending clamp is lowered onto the pipe fitting and the pipe can be bent by the pipe bending rotation driving unit. During this process, the push rod moves down and rotates out to be separated from the pressure plate, so that the fixing clamp can be clamped on the pipe fitting on the fixed die under the elastic force of the tensioning spring. Similarly, after the bending structure is reset after bending, the push rod can continue to lift the pressure plate to pull the pressure plate, so that the fixing clamp on the pipe fitting on the fixed die can be solved. The pipe fitting is clamped in this way, which effectively replaces the traditional hydraulically driven clamping mechanism and has linkage with the bending action, so the cost of the pipe bending machine is effectively reduced and the efficiency of the pipe bending process is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 For the utility model Figure 1 Rear view of.

[0020] Figure 3 For the utility model Figure 2 Schematic diagram of the structure without the rack.

[0021] Figure 4 It is a structural schematic diagram of the fixing fixture, the pre-tightening and pressing structure and the bending fixture of the utility model.

[0022] The accompanying drawings are marked as follows: 1. frame; 2. fixed mold; 3. bending mold; 4. fixed shaft; 5. rotation support; 6. bending rotation drive unit; 61. rotating motor; 62. main gear; 63. sub-gear; 7. bending structure; 71. hydraulic rod; 72. bending fixture; 8. fixed fixture; 9. pre-tightening and pressing structure; 91. fixed plate; 92. telescopic rod; 93. tensioning spring; 94. pressure plate; 95. fixed pressure block; 10. push rod; 11. assembly plate; 12. fixed pipe groove; 13. bending pipe groove; 14. telescopic groove. DETAILED DESCRIPTION

[0023] Combined with reference Figure 1 The utility model provides a bending tube clamping device for a tube bending machine, including a frame 1, a front surface of the frame 1 is provided with a fixed die 2 and a tube bending die 3; the fixed die 2 is used to provide support for the tube to bend, and the tube bending die 3 is used to provide plasticity for the tube to bend; one end of the fixed die 2 and the tube bending die 3 are fixedly connected to a fixed shaft rod 4, and the fixed shaft rod 4 is fixedly connected to the frame 1.

[0024] Combined with reference Figure 2-Figure 3 A rotating support 5 is rotatably connected to the fixed shaft 4 of the bending mold 3, and a bending rotation drive unit 6 for driving the rotating support 5 to rotate is provided on the frame 1; the bending rotation drive unit 6 includes a rotating motor 61 fixedly connected to the rear surface of the frame 1, a main gear 62 fixedly connected to the power output end of the rotating motor 61, and a sub-gear 63 meshingly connected to the main gear 62; the main gear 62 is located at the front surface position of the frame 1, and the sub-gear 63 is fixedly connected to the end side position of the rotating support 5.

[0025] The fixed shaft rod 4 of the tube bending die 3 movably passes through the auxiliary gear 63; thus, the auxiliary gear 63 does not contact the fixed shaft rod 4 when rotating.

[0026] A bending structure 7 is provided on the inner side of the rotating support 5, and the bending structure 7 includes a hydraulic rod 71 and a bending clamp 72 fixedly connected to the power output end of the hydraulic rod 71. A fixing clamp 8 is provided above the fixed mold 2; the fixing clamp 8 is used to clamp the pipe fitting on the fixed mold 2, so as to ensure the stability of the pipe fitting being bent on the bending mold 3.

[0027] Specifically, after the pipe fitting is arranged on the pipe bending die 3, the bending fixture 72 can be driven downward by the hydraulic rod 71 until the pipe fitting is located between the bending fixture 72 and the pipe bending die 3, and then the rotating motor 61 can be started, and the main gear 62 driven by the motor can engage the sub-gear 63 to rotate, so that the sub-gear 63 can drive the bending fixture 72 on the inner side of the rotating support 5 to rotate around the axis of the pipe bending die 3, so that the pipe fitting can be plastically bent on the pipe bending die 3.

[0028] An assembly plate 11 is fixedly connected to the end side of the frame 1; the assembly plate 11 is used to fix the frame 1 on the mounting surface; a fixed pipe groove 12 is provided on the fixed mold 2, a bending pipe groove 13 is provided on the bending mold 3, and a first pipe groove matching the fixed pipe groove 12 is provided on the fixing fixture 8; the fixed pipe groove 12 can cooperate with the first pipe groove to clamp and fix the pipe fitting; a second pipe groove matching the bending pipe groove 13 is provided on the bending fixture 72; the bending pipe groove 13 can cooperate with the second pipe groove to plastically bend the pipe fitting.

[0029] A pre-tightening and pressing structure 9 is provided on the frame 1, and a fixing clamp 8 is fixedly connected to the pre-tightening and pressing structure 9. One end of the bending clamp 72 is fixedly connected to a push rod 10, and the push rod 10 movably passes through the rotating support 5 and extends backward; when a pipe fitting is provided on the fixed mold 2 and the push rod 10 is movably connected to the pre-tightening and pressing structure 9, the fixing clamp 8 is located above the pipe fitting; or, when a pipe fitting is provided on the fixed mold 2 and the push rod 10 is disengaged from the pre-tightening and pressing structure 9, the fixing clamp 8 clamps the pipe fitting on the fixed mold 2.

[0030] Combined with reference Figure 4 The pre-tightening and pressing structure 9 includes a fixing plate 91 fixedly connected to the front surface of the frame 1, a pair of telescopic rods 92 fixedly connected to the bottom of the fixing plate 91, a tensioning spring 93 sleeved on each telescopic rod 92, a pressing plate 94 fixedly connected to the pair of telescopic rods 92 and a fixed pressing block 95 fixedly connected to one end of the pressing plate 94; an arc plate is integrally provided at one end of the pressing plate 94; the advantage of the arc plate design is that the arc plate can be easily pushed up when the push rod 10 rises, so that the pressing plate 94 can be easily lifted up; the fixing clamp 8 is fixedly connected to the fixed pressing block 95.

[0031] A telescopic slot 14 is provided on the side of the rotating support 5 , and the push rod 10 is slidably connected in the telescopic slot 14 and extends backward; the design of the telescopic slot 14 can provide a moving range for the lifting push rod 10 .

[0032] When a pipe fitting is provided on the fixed mold 2 and the push rod 10 is movably connected to the pressure plate 94, the fixing clamp 8 is located above the pipe fitting; or, when a pipe fitting is provided on the fixed mold 2 and the push rod 10 is disengaged from the pressure plate 94, the fixing clamp 8 clamps the pipe fitting on the fixed mold 2.

[0033] Specifically, after the pipe fitting is placed on the fixed mold 2 and the bending mold 3 at the same time, the hydraulic rod 71 is started to drive the bending clamp 72 to move downward to confine the pipe fitting between the bending groove 13 and the second pipe groove. At this time, the push rod 10 can synchronize the bending clamp 72 to descend. Under the elastic force of the tensioning spring 93, the pressure plate 94 can be pressed down, and the descending pressure plate 94 can drive the fixed clamp 8 to press on the pipe fitting on the fixed mold 2. At this time, the first pipe groove corresponds to the pipe wall of the pipe fitting. When the bending rotation drive unit 6 drives the bending clamp 72 to rotate around the bending mold 3, the push rod 10 can be separated from the pressure plate 94. In this way, the fixed clamp 8 provides stable clamping for the pipe fitting, and the bending clamp 72 can bend the pipe fitting around the bending mold 3 to plastically bend the pipe fitting.

[0034] Similarly, when the pipe bending is completed, the pipe bending rotation drive unit 6 can drive the rotating support 5 to reset, that is, drive the bending fixture 72 to be located above the pipe bending mold 3. At the same time, the hydraulic rod 71 can drive the bending fixture 72 to be lifted and reset. During this process, the position of the push rod 10 can contact the arc plate at one end of the lifting pressure plate 94 on the reset path. Under the vertical guidance provided by the telescopic rod 92 for the pressure plate 94, the force of the arc plate can drive the pressure plate 94 to move upward. At this time, the tensioning spring 93 is in a compressed state, so that the fixing fixture 8 can be detached from the pipe fitting to remove the pipe fitting.

[0035] In this embodiment, the fixed clamp 8 clamps the pipe by the bending action of the linkage bending structure 7. The pipe is clamped in this way, which effectively replaces the traditional hydraulically driven clamping mechanism. At the same time, it is linked with the bending action, thereby effectively reducing the cost of the pipe bending machine and improving the efficiency of the pipe bending process.

Claims

1. A pipe bending clamping device for a pipe bending machine, comprising a frame (1), characterized in that: The front surface of the frame (1) is provided with a fixed die (2) and a pipe bending die (3), one end of each of the fixed die (2) and the pipe bending die (3) is fixedly connected to a fixed shaft (4), the fixed shaft (4) is fixedly connected to the frame (1), a rotating support (5) is rotatably connected to the fixed shaft (4) of the pipe bending die (3), the frame (1) is provided with a pipe bending rotation drive unit (6) for driving the rotating support (5) to rotate, and a bending structure (6) is provided on the inner side of the rotating support (5). 7), the bending structure (7) comprises a hydraulic rod (71) and a bending fixture (72) fixedly connected to the power output end of the hydraulic rod (71), a fixing fixture (8) is arranged above the fixed mold (2), a pre-tightening and pressing structure (9) is arranged on the frame (1), the fixing fixture (8) is fixedly connected to the pre-tightening and pressing structure (9), one end of the bending fixture (72) is fixedly connected to a push rod (10), and the push rod (10) movably passes through the rotating support (5) and extends backward; When a pipe fitting is arranged on the fixed mold (2) and the push rod (10) is movably connected to the pre-tightening and pressing structure (9), the fixing fixture (8) is located above the pipe fitting; Alternatively, when a pipe fitting is arranged on the fixed mold (2) and the push rod (10) is disengaged from the pre-tightening and pressing structure (9), the fixing clamp (8) clamps the pipe fitting on the fixed mold (2).

2. The pipe bending clamping device for a pipe bending machine according to claim 1, characterized in that: The end side of the frame (1) is fixedly connected to an assembly plate (11), the fixed die (2) is provided with a fixed pipe groove (12), the bending die (3) is provided with a bending pipe groove (13), the fixed fixture (8) is provided with a first pipe groove matching the fixed pipe groove (12), and the bending fixture (72) is provided with a second pipe groove matching the bending pipe groove (13).

3. The pipe bending clamping device for a pipe bending machine according to claim 1, characterized in that: The bent pipe rotation drive unit (6) comprises a rotating motor (61) fixedly connected to the rear surface of the frame (1), a main gear (62) fixedly connected to the power output end of the rotating motor (61), and a sub-gear (63) meshingly connected to the main gear (62); the main gear (62) is located at the front surface of the frame (1), and the sub-gear (63) is fixedly connected to the end side of the rotating support (5).

4. The pipe bending clamping device for a pipe bending machine according to claim 3, characterized in that: The fixed shaft rod (4) of the tube bending die (3) movably passes through the auxiliary gear (63).

5. The pipe bending clamping device for a pipe bending machine according to claim 1, characterized in that: The pre-tightening and pressing structure (9) comprises a fixing plate (91) fixedly connected to the front surface of the frame (1), a pair of telescopic rods (92) fixedly connected to the bottom of the fixing plate (91), a tensioning spring (93) sleeved on each telescopic rod (92), a pressing plate (94) fixedly connected to the pair of telescopic rods (92), and a fixed pressing block (95) fixedly connected to one end of the pressing plate (94); One end of the pressing plate (94) is integrally provided with an arc-shaped plate; The fixing clamp (8) is fixedly connected to the fixing pressing block (95).

6. The pipe bending clamping device for a pipe bending machine according to claim 1, characterized in that: A telescopic slot (14) is provided on the side of the rotating support (5), and the push rod (10) is slidably connected in the telescopic slot (14) and extends backward.

7. The pipe bending clamping device for a pipe bending machine according to claim 5, characterized in that: When a pipe fitting is provided on the fixed mold (2) and the push rod (10) is movably connected to the pressing plate (94), the fixing fixture (8) is located above the pipe fitting; Alternatively, when a pipe fitting is arranged on the fixed mold (2) and the push rod (10) is separated from the pressing plate (94), the fixing clamp (8) clamps the pipe fitting on the fixed mold (2).

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