Large-diameter thick-wall copper pipe diameter expanding and wall reducing device
Through the large-diameter thick-wall copper tube expansion and wall reduction device, the cooperation between the main cylinder core rod and the expansion die is used to achieve single-time large wall thickness thinning, which solves the time-consuming and labor-intensive problems of the traditional drawing process, improves processing efficiency and yield rate, and reduces costs.
Patent Information
- Application Number
- CN202422964838.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The diameter expansion and wall reduction processing of large-diameter thick-walled copper tubes is time-consuming and labor-intensive, with a low yield rate. The traditional drawing process is costly and the wall thickness reduction is small.
A large-diameter, thick-walled copper tube diameter expansion and wall reduction device is used, which includes a first bracket, a second bracket, a main cylinder, an expansion die and a clamping mechanism. The main cylinder core rod passes through the tube blank and connects to the expansion die. Combined with a pressure plate and a pushing mechanism, single diameter expansion and wall reduction are achieved, which reduces subsequent processing steps and improves processing efficiency and quality.
It significantly improves processing efficiency, reduces work hardening, reduces energy consumption and costs, and improves product quality and yield.
Smart Images
Figure CN223440862U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal pipe processing, in particular to a diameter expansion and wall reduction device for large-diameter thick-wall copper pipes. Background Art
[0002] Large-diameter thick-walled copper tubes are difficult to process. Currently, the traditional drawing process is used to expand and reduce the diameter of large-diameter thick-walled tubes in China. The entire process requires multiple drawing and annealing and then drawing. During the processing, the wall thickness of the thick-walled copper tube is reduced by a small amount, which is time-consuming, labor-intensive, costly, and has a low yield rate. Utility Model Content
[0003] In response to the above technical problems, the utility model provides a large-diameter thick-wall copper tube diameter expansion and wall reduction device, which is used to solve the problem that the diameter expansion and wall reduction of large-diameter thick-wall tubes using a drawing process is time-consuming and labor-intensive.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:
[0005] A device for expanding and reducing the diameter of a large-diameter thick-walled copper tube comprises a first bracket and a second bracket. The second bracket is arranged at the tail of the first bracket, and the first bracket and the second bracket are collinear. A main cylinder is installed on the top of the first bracket, and the end of the core rod of the main cylinder is provided with a thread. A V-shaped groove is provided on the top of the second bracket, and a tube blank is placed on the V-shaped groove. A plurality of pressure plate oil cylinders are vertically arranged above the second bracket through a mounting frame. A pressure plate is installed on the telescopic end of the pressure plate oil cylinder, and the pressure plate is crimped onto the tube blank. After the core rod of the main cylinder passes through the tube blank, it is threadedly connected to an expansion die. The expansion die is truncated cone-shaped, and the core rod of the main cylinder is connected to one end of the small head of the expansion die through a threaded fit.
[0006] A front positioning oil cylinder and a rear positioning oil cylinder are installed on the first bracket. The telescopic end of the front positioning oil cylinder is connected to the head of the master cylinder body, and the telescopic end of the rear positioning oil cylinder is connected to the rear of the master cylinder body.
[0007] A clamping mechanism is provided between the first bracket and the second bracket, and the clamping mechanism consists of a clamping frame, an upper jaw cylinder and a lower jaw cylinder. The upper jaw cylinder and the lower jaw cylinder are relatively installed at the upper and lower ends of the clamping frame, and jaw plates are installed on the telescopic ends of the upper jaw cylinder and the lower jaw cylinder. After the tube blank is placed on the V-shaped groove, its head end is clamped and positioned by two jaw plates.
[0008] A pushing mechanism is provided at the tail of the main cylinder body, and the pushing mechanism consists of a pushing cylinder and a cylinder inner sleeve. Two pushing cylinders are provided, and the two pushing cylinders are symmetrically installed at the tail of the main cylinder body. The movable sleeve of the cylinder inner sleeve is provided on the core rod, and the telescopic ends of the two pushing cylinders are correspondingly connected to the movable sleeves of the cylinders.
[0009] The tail of the second support is provided with a mold platform, the mold platform is composed of a base and a rotary disc, the rotary disc is rotatably installed on the base, a plurality of mold supports are uniformly arranged on the outer circle of the rotary disc, mounting holes are formed on the mold supports, the mounting holes are coaxial with the core rod of the main cylinder, a diameter expanding mold is placed in the mounting holes, a positioning pin cylinder is installed on the side of the base through a supporting rod, and the extension end of the positioning pin cylinder is arranged on the rotary disc.
[0010] Compared with the prior art, the beneficial effects of the utility model are: the pipe blank is limited on the V-shaped groove through the pressing plate oil cylinder, then the main cylinder core rod is extended to pass through the pipe blank, the diameter expanding mold is connected, then the main cylinder core rod is retracted, the pipe blank realizes diameter expansion and wall reduction under the action of the diameter expanding mold, a greater wall thickness reduction can be realized by single processing, the number of subsequent processing procedures is significantly reduced, the overall processing efficiency is improved, secondly, the constraint on the material during processing is less, the work hardening phenomenon is effectively alleviated, so that the necessity of frequent annealing treatment in subsequent processing is avoided, the energy consumption and cost are further reduced, finally, the reduced work hardening and the improvement of material fluidity also create more favorable conditions for subsequent processing steps, reduce the processing difficulty, and improve the overall quality and consistency of the product. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the utility model;
[0012] Figure 2 It is a structural schematic diagram of the clamping mechanism in the utility model;
[0013] Figure 3 It is a structural schematic diagram of the mold platform in the utility model.
[0014] In the drawing:
[0015] 1, first support; 2, second support; 3, main cylinder; 4, V-shaped groove; 5, mounting frame; 6, pressing plate oil cylinder; 7, pressing plate; 8, diameter expanding mold; 9, front positioning oil cylinder; 10, rear positioning oil cylinder; 11, clamping frame; 12, upper jaw oil cylinder; 13, lower jaw oil cylinder; 14, pushing cylinder; 15, cylinder inner sleeve; 16, base; 17, rotary disc; 18, mold support; 19, mounting hole; 20, positioning pin cylinder; 21, core pipe; 22, supporting rod. DETAILED DESCRIPTION
[0016] 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.
[0017] A large-diameter thick-walled copper pipe expanding and reducing wall device, comprising a first support 1 and a second support 2, the second support 2 is arranged at the tail of the first support 1, the first support 1 and the second support 2 are collinear, a main cylinder 3 is installed on the top of the first support 1, a threaded end is arranged on the core rod 21 of the main cylinder 3, a V-shaped groove 4 is arranged on the top of the second support 2, the pipe blank is placed on the V-shaped groove 4, a plurality of pressing plates 7 oil cylinders 6 are vertically arranged on the top of the second support 2 through the mounting frame 5, the pressing plates 7 are installed on the extension end of the pressing plates 7 oil cylinders 6, the pressing plates 7 are pressed on the pipe blank, the core rod 21 of the main cylinder 3 is connected with the expanding die 8 through threads after penetrating the pipe blank, the expanding die 8 is in the shape of a circular truncated cone, and the core rod 21 of the main cylinder 3 is connected with one end of the small head of the expanding die 8 through thread cooperation. The pipe blank is limited on the V-shaped groove 4 by the pressing plates 7 oil cylinders 6, then the core rod 21 of the main cylinder 3 extends to penetrate the pipe blank, connects the expanding die 8, and then the core rod 21 of the main cylinder 3 retracts, the pipe blank realizes expanding and reducing wall under the action of the expanding die 8, a larger wall thickness reduction can be realized in a single processing, the number of subsequent processing procedures is significantly reduced, and the overall processing efficiency is improved; secondly, the pressing plates 7 ensure the uniformity and consistency of the expanding process, effectively prevent the pipe blank from shaking or deforming during the processing, and thus improve the processing quality and the yield.
[0018] The first support 1 is provided with a front positioning oil cylinder 9 and a rear positioning oil cylinder 10, the extension end of the front positioning oil cylinder 9 is connected with the head of the main cylinder 3, and the extension end of the rear positioning oil cylinder 10 is connected with the rear of the main cylinder 3. The positions of the main cylinder 3 can be adjusted through the front positioning oil cylinder 9 and the rear positioning oil cylinder 10, so as to ensure that the coaxialities of the main cylinder 3 and the pipe blank are the same.
[0019] A clamping mechanism is arranged between the first support 1 and the second support 2, the clamping mechanism is composed of a clamping frame 11, an upper jaw oil cylinder 12 and a lower jaw oil cylinder 13, the upper jaw oil cylinder 12 and the lower jaw oil cylinder 13 are oppositely arranged on the upper and lower ends of the clamping frame 11, and jaw plates are arranged on the extension ends of the upper jaw oil cylinder 12 and the lower jaw oil cylinder 13. After the pipe blank is placed on the V-shaped groove 4, the head end of the pipe blank is clamped and positioned by the two jaw plates. The extension ends of the upper jaw oil cylinder 12 and the lower jaw oil cylinder 13 are driven to move oppositely, the head of the pipe blank is further limited, and the misalignment of the pipe blank during the expanding and reducing wall process is avoided.
[0020] The tail of the main cylinder 3 cylinder body is provided with a pushing mechanism, the pushing mechanism is composed of a pushing cylinder 14 and a cylinder inner sleeve 15, the pushing cylinder 14 is provided with two, the two pushing cylinders 14 are symmetrically installed at the tail of the main cylinder 3 cylinder body, the cylinder inner sleeve 15 is movably sleeved on the core rod 21, and the telescopic ends of the two pushing cylinders 14 are connected with the cylinder movable sleeve correspondingly. The pushing mechanism limits the pipe blank through the side of the cylinder inner sleeve 15 during the expanding and reducing wall process, after the expanding and reducing wall, the telescopic end of the pushing cylinder 14 is stretched out, drives the cylinder inner sleeve 15 to move, pushes the pipe blank from the caliper to the V-shaped groove 4, and then is transported through the transfer equipment.
[0021] The tail of the second support 2 is provided with a mold platform, the mold platform is composed of a base 16 and a rotary disc 17, the rotary disc 17 is rotatably installed on the base 16, a plurality of mold supports 18 are uniformly arranged on the outer circle of the rotary disc 17, an installation hole 19 is formed in the mold support 18, the installation hole 19 is coaxial with the core rod 21 of the main cylinder 3, the expanding mold 8 is placed in the installation hole 19, a positioning pin cylinder 20 is installed on the side of the base 16 through a supporting rod 22, and the telescopic end of the positioning pin cylinder 20 is arranged on the rotary disc 17 after being stretched out. The installation of the mold platform improves the installation precision, realizes the rapid replacement and stable installation of the mold, and the corresponding expanding mold 8 can be selected according to the pipe blank of different specifications and installed on the mold support 18, when replacement is needed, the telescopic end of the positioning pin cylinder 20 is retracted, the rotary disc 17 is rotated, the processing of copper pipes of different specifications is convenient, and the rapid replacement and stable installation of the mold are realized.
[0022] In use:
[0023] Firstly, the pipe blank is transported to the V-shaped groove 4 through the transfer equipment, the coaxiality of the main cylinder 3 and the pipe blank is adjusted, the core rod 21 penetrates through the inside of the pipe blank, the mold 8 is connected, the machine is started, the core rod 21 drives the mold 8 to move backward, drives the pipe blank to move backward, is clamped on the caliper, the relative movement of the telescopic ends of the upper caliper oil cylinder 12 and the lower caliper oil cylinder 13 is driven, the pipe blank is limited, the telescopic end of the pressing plate 7 oil cylinder 6 is stretched out, the pressing plate 7 is driven to be pressed on the pipe blank, then the main cylinder 3 is operated under full pressure, the core rod 21 is retracted, the expanding mold 8 is driven into the pipe blank through tension, the pipe blank is expanded and the wall is reduced, when the expanding mold 8 moves to the pipe blank head, the expanding mold 8 stops moving, at the same time, the uniformity and consistency of the pipe blank expansion are ensured by adjusting the pressing plate 7 oil cylinder 6, the pipe blank is effectively prevented from shaking or deforming, after the processing is completed, the core rod 21 of the main cylinder 3 drives the mold to move backward, the mold and the pipe blank are separated, the telescopic end of the pushing cylinder 14 is stretched out, the pipe blank is pushed from the caliper to the V-shaped groove 4 through the movement of the cylinder inner sleeve 15, then is transported through the transfer equipment, and the whole processing flow is completed. In addition, the processing of copper pipes of different specifications is convenient through the mold platform, the rapid replacement and stable installation of the mold are realized.
[0024] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A device for expanding and reducing the diameter of a large-diameter, thick-walled copper tube, characterized by: The invention comprises a first bracket (1) and a second bracket (2), wherein the second bracket (2) is arranged at the tail of the first bracket (1), the first bracket (1) and the second bracket (2) are collinear, a main cylinder (3) is installed on the top of the first bracket (1), the end of the core rod (21) of the main cylinder (3) is provided with a thread, a V-shaped groove (4) is opened on the top of the second bracket (2), a tube blank is placed on the V-shaped groove (4), a plurality of pressure plate oil cylinders (6) are vertically provided above the second bracket (2) through a mounting frame (5), a pressure plate (7) is installed on the telescopic end of the pressure plate oil cylinder (6), and the pressure plate (7) is crimped onto the tube blank, the core rod (21) of the main cylinder (3) passes through the tube blank and is threadedly connected to an expansion die (8), the expansion die (8) is truncated, and the core rod (21) of the main cylinder (3) is connected to one end of the small head of the expansion die (8) through threaded matching.
2. The device for expanding and reducing the diameter of a large-diameter, thick-walled copper tube according to claim 1, characterized in that: A front positioning oil cylinder (9) and a rear positioning oil cylinder (10) are mounted on the first bracket (1), the telescopic end of the front positioning oil cylinder (9) being connected to the head of the cylinder body of the master cylinder (3), and the telescopic end of the rear positioning oil cylinder (10) being connected to the rear of the cylinder body of the master cylinder (3).
3. The device for expanding and reducing the diameter of a large-diameter, thick-walled copper tube according to claim 2, characterized in that: A clamping mechanism is provided between the first bracket (1) and the second bracket (2), and the clamping mechanism consists of a clamping frame (11), an upper jaw cylinder (12) and a lower jaw cylinder (13). The upper jaw cylinder (12) and the lower jaw cylinder (13) are relatively mounted at the upper and lower ends of the clamping frame (11). Jaw plates are mounted on the telescopic ends of the upper jaw cylinder (12) and the lower jaw cylinder (13). After the tube blank is placed on the V-shaped groove (4), its head end is clamped and positioned by the two jaw plates.
4. The device for expanding and reducing the diameter of a large-diameter, thick-walled copper tube according to claim 3, characterized in that: The tail of the main cylinder (3) is provided with a pushing mechanism, which is composed of a pushing cylinder (14) and a cylinder inner sleeve (15). Two pushing cylinders (14) are provided, and the two pushing cylinders (14) are symmetrically installed at the tail of the main cylinder (3). The movable sleeve of the cylinder inner sleeve (15) is arranged on the core rod (21), and the telescopic ends of the two pushing cylinders (14) are correspondingly connected to the movable sleeve of the cylinder.
5. The device for expanding and reducing the diameter of a large-diameter, thick-walled copper tube according to claim 4, characterized in that: A mold platform is provided at the tail of the second bracket (2), and the mold platform consists of a base (16) and a rotary disk (17). The rotary disk (17) is rotatably mounted on the base (16). A plurality of mold brackets (18) are evenly distributed on the outer circle of the rotary disk (17). A mounting hole (19) is provided on the mold bracket (18). The mounting hole (19) is coaxial with the core rod (21) of the main cylinder (3). The expansion mold (8) is placed in the mounting hole (19). A positioning pin cylinder (20) is installed on the side of the base (16) through a support rod (22). The telescopic end of the positioning pin cylinder (20) is extended and passed through the rotary disk (17).