Hollow head manufacturing device for large-diameter thick-wall copper pipe

Abstract

The utility model discloses a hollow head manufacturing device for a large-caliber thick-wall copper pipe, and relates to the technical field of copper pipes. The head making machine comprises a feeding mechanism, a head making mechanism and a control mechanism, the head making mechanism is composed of a support, eight executing oil cylinders and a head making die, the support is installed at the feeding end of the feeding mechanism, a supporting sleeve is arranged on the support, cylinder bodies of the eight executing oil cylinders are evenly distributed on the inner circle of the supporting sleeve, and the head making die is arranged on the supporting sleeve. The executing ends of the eight sets of executing oil cylinders all point to the circle center of the supporting sleeve, the head manufacturing die is round, the inner circle structure of the head manufacturing die corresponds to the outer circle structure of a copper pipe after head manufacturing, the head manufacturing die is evenly divided into eight head manufacturing sub-dies around the circle center of the head manufacturing die, and the executing end of each executing oil cylinder is correspondingly connected with one head manufacturing sub-die. And the eight groups of execution oil cylinders are driven by a control mechanism. According to the utility model, the die with the eight separable petals is adopted, so that the tube blank is prevented from being excessively compacted, and favorable conditions are provided for subsequent die withdrawing by using calipers.

Description

TECHNICAL FIELD

[0001] The utility model relates to copper pipe technical field, especially a kind of large-diameter thick-walled copper pipe hollow head device. BACKGROUND

[0002] Large-diameter thick-walled copper pipe needs to be operated from pipe tail after expanding, and the end of the pipe blank needs to be pre-processed to ensure smooth demolding process, but the existing head processing method can cause the head of the pipe blank to be flat, which affects the clamping effect of the clamp and causes the demolding process to be unsuccessful. SUMMARY

[0003] To solve the problem that the existing head processing method cannot complete the head processing operation of large-diameter thick-walled copper pipe, the utility model provides a large-diameter thick-walled copper pipe hollow head device.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A large-diameter thick-walled copper pipe hollow head device includes a feeding mechanism, a head forming mechanism, and a control mechanism. The head forming mechanism is composed of a support, an execution oil cylinder, and a head forming die. The support is installed at the feeding end of the feeding mechanism, and a support sleeve is provided on the support. The execution oil cylinder has eight groups, and the cylinder bodies of the eight groups of execution oil cylinders are evenly distributed on the inner circle of the support sleeve. The execution ends of the eight groups of execution oil cylinders all point to the center of the support sleeve. The head forming die is circular, and the inner circle structure of the head forming die corresponds to the outer circle structure of the copper pipe after head forming. The head forming die is evenly divided into eight head forming sub-dies around its center. The execution end of each execution oil cylinder is connected to a head forming sub-die, and the control ends of the eight groups of execution oil cylinders are connected to the control mechanism.

[0006] The feeding mechanism is composed of a feeding rack, a conveying roller, and a discharging rack. The feeding rack and the discharging rack are arranged on the front and back sides of the conveying roller. The outlet end of the conveying roller corresponds to the position of the head forming die.

[0007] The inner circle structure of the head forming die is stepped.

[0008] The control mechanism is composed of an inlet pressure valve block, an outlet pressure valve block, and a hydraulic station. The inlet pressure valve block is arranged on the oil inlet of the execution oil cylinder. The inlet pressure valve blocks are connected by an inlet die pipeline. An inlet die pressure connection flange is arranged on the inlet die pipeline. The outlet pressure valve block is arranged on the oil outlet of the execution oil cylinder. The outlet pressure valve blocks are connected by an outlet die pipeline. An outlet die pressure connection flange is arranged on the outlet die pipeline. The inlet die pressure connection flange and the outlet die pressure connection flange are connected to the hydraulic station.

[0009] Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a control mechanism is used for transmitting pressure to eight sets of execution oil cylinders, the execution end of the eight sets of execution oil cylinders drives the head sub-mold connected therewith to move inward to the center, the mold with eight separable structures not only avoids the pipe blank being excessively compacted, but also accurately shapes the head part of the pipe blank into a hollow cylindrical shape, which provides favorable conditions for subsequent use of the clamp mold stripping and guarantees subsequent diameter expansion and wall reduction. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the head forming mechanism in the utility model;

[0012] Figure 3 It is a half cut structure schematic diagram of the head mold in the utility model;

[0013] Figure 4 It is a front structure schematic diagram of the pipe embryo head forming in the utility model;

[0014] Figure 5 It is a rear structure schematic diagram of the pipe embryo head forming in the utility model.

[0015] In the drawing:

[0016] 1, feeding mechanism; 2, head forming mechanism; 4, support; 5, execution oil cylinder; 6, head mold; 7, support sleeve; 8, head sub-mold; 9, feeding frame; 10, conveying roller; 11, discharging frame; 12, inlet pressure valve block; 13, outlet pressure valve block; 14, hydraulic station; 15, mold inlet pipeline; 16, mold inlet pressure connection flange; 17, mold outlet pipeline; 18, mold outlet pressure connection flange. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0018] A large-diameter thick-walled copper pipe hollow head forming device, comprising a feeding mechanism 1, a head forming mechanism 2 and a control mechanism, the head forming mechanism 2 is composed of a support 4, an execution oil cylinder 5 and a head forming die 6, the support 4 is installed at the feeding end of the feeding mechanism 1, the support 4 is provided with a supporting sleeve 7, the execution oil cylinder 5 is provided with eight groups, the cylinder bodies of the eight groups of execution oil cylinders 5 are uniformly arranged on the inner circle of the supporting sleeve 7, the execution ends of the eight groups of execution oil cylinders 5 all point to the center of the supporting sleeve 7, the head forming die 6 is circular, the inner circle structure of the head forming die 6 corresponds to the outer circle structure of the copper pipe after head forming, the head forming die 6 is uniformly divided into eight head forming sub-dies 8 around its center, the execution end of each execution oil cylinder 5 corresponds to connect a head forming sub-die 8, the control ends of the eight groups of execution oil cylinders 5 are connected with the control mechanism.

[0019] The feeding mechanism 1 is composed of a feeding rack 9, a conveying roller 10 and a discharging rack 11, the feeding rack 9 and the discharging rack 11 are arranged on the front and rear sides of the conveying roller 10, and the outlet end of the conveying roller 10 corresponds to the position of the head forming die 6. The pipe blank is placed on the feeding rack 9, and the pipe blank is spread out and arranged well, during head forming, the pipe material is pulled into the conveying roller 10 by hand, when the blank enters the roller way, the head forming work is completed by manually dragging the pipe blank, after the head forming is finished, the pipe blank is dragged out of the head forming machine body by hand, and then the pipe blank is pushed into the discharging rack 11 by hand, the pipe blank is packed and transported to the next process.

[0020] The inner circle structure of the head forming die 6 is stepped. When the pipe blank is initially extruded, due to the large pipe opening, the first step is extruded, and then the extrusion is carried out step by step, the processing rate is reduced, the clamping and cracking are prevented, and the circular arc transition is formed.

[0021] The control mechanism is composed of an inlet valve block 12, an outlet valve block 13 and a hydraulic station 14, the inlet valve block 12 is correspondingly arranged on the oil inlet of the execution oil cylinder 5, the inlet valve blocks 12 are communicated through inlet die pipelines 15, the inlet die pipelines 15 are provided with inlet die pressure connecting flanges 16, the outlet valve block 13 is correspondingly arranged on the oil outlet of the execution oil cylinder 5, the outlet valve blocks 13 are communicated through outlet die pipelines 17, the outlet die pipelines 17 are provided with outlet die pressure connecting flanges 18, and the inlet die pressure connecting flanges 16 and the outlet die pressure connecting flanges 18 are connected with the hydraulic station 14.

[0022] In use:

[0023] When the pipe embryo is made into a head, the front section of the pipe blank is sent into the head mold 6, the pressure of the hydraulic station 14 is sent into the mold feeding pipe 15 through the mold feeding pressure connecting flange 16, the pressure in the mold feeding pipe 15 is uniformly distributed into the eight groups of pressure feeding valve blocks 12, the execution oil cylinder 5 is driven to move, each head sub-mold 8 is driven to move towards the center of the circle by the execution end of the execution oil cylinder 5, extrusion is carried out through the first step of the head mold, the pipe blank is once made into a head, then extrusion is carried out step by step, the processing rate is reduced, clamping and cracking are prevented, the circular arc transition is formed, after the head is made, the pressure of the hydraulic station 14 is sent into the mold withdrawing pipe 17 through the mold withdrawing pressure connecting flange 18, the pressure in the mold withdrawing pipe 17 is uniformly distributed into the eight groups of pressure withdrawing valve blocks 13, the execution oil cylinder 5 is driven to move, each head sub-mold 8 is driven to move towards the periphery of the circle by the execution end of the execution oil cylinder 5, the head part is withdrawn, the smooth separation of the eight head sub-molds 8 is realized, and the whole head making process is efficiently completed.

[0024] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hollow head making device for large-caliber thick-walled copper tubes, characterized by: The invention comprises a feeding mechanism (1), a head making mechanism (2) and a control mechanism, wherein the head making mechanism (2) is composed of a support (4), an execution oil cylinder (5) and a head making mold (6), the support (4) is installed at the feeding end of the feeding mechanism (1), a support sleeve (7) is provided on the support (4), eight execution oil cylinders (5) are provided, the cylinder bodies of the eight groups of execution oil cylinders (5) are evenly arranged on the inner circle of the support sleeve (7), the execution ends of the eight groups of execution oil cylinders (5) all point to the center of the support sleeve (7), the head making mold (6) is circular, the inner circle structure of the head making mold (6) corresponds to the outer circle structure of the copper tube after the head making, the head making mold (6) is evenly divided into eight head making sub-molds (8) around its center, the execution end of each execution oil cylinder (5) is correspondingly connected to a head making sub-mold (8), and the eight groups of execution oil cylinders (5) are driven by the control mechanism.

2. A hollow header making device for large-diameter, thick-walled copper tubes according to claim 1, characterized in that: The feeding mechanism (1) is composed of a loading rack (9), a conveying roller (10) and a unloading rack (11). The loading rack (9) and the unloading rack (11) are arranged on the front and rear sides of the conveying roller (10). The outlet end of the conveying roller (10) corresponds to the position of the head mold (6).

3. A hollow header making device for large-diameter, thick-walled copper tubes according to claim 2, characterized in that: The inner circle structure of the head making mold (6) is stepped.

4. The device for making hollow ends of large-diameter, thick-walled copper tubes according to claim 2, characterized in that: The control mechanism is composed of a pressure inlet valve block (12), a pressure relief valve block (13) and a hydraulic station (14). The pressure inlet valve block (12) is correspondingly arranged on the oil inlet of the executing oil cylinder (5). The pressure inlet valve blocks (12) are connected through a die feed pipe (15). The die feed pipe (15) is provided with a die feed pressure connecting flange (16). The pressure relief valve block (13) is correspondingly arranged on the oil outlet of the executing oil cylinder (5). The pressure relief valve blocks (13) are connected through a die removal pipe (17). The die removal pipe (17) is provided with a die removal pressure connecting flange (18). Both the die removal pressure connecting flange (16) and the die removal pressure connecting flange (18) are connected to the hydraulic station (14).

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