Bent pipe multi-section die

Abstract

The utility model discloses a multi-section die for an elbow, relates to the field of dies, and aims to solve the problems that a large number of dies occupy the production space due to the fact that existing elbows are numerous in model and a set of dies needs to be developed according to different angle sizes, and meanwhile, different dies need to be replaced when different elbows are produced, so that the production efficiency is influenced in the prior art. A semi-circular-ring-shaped die groove is formed in the upper end face of the lower die base, first telescopic grooves are formed in the two sides of the middle in the lower die base and located at the lower end of the semi-circular-ring-shaped die groove, a connecting groove is formed between the two first telescopic grooves, and a second telescopic groove is connected between the middle of the connecting groove and the upper end face of the lower die base. Push rods are arranged in the connecting grooves, a connecting rod is connected between the push rods of the two connecting grooves, a linkage rod is arranged in the second telescopic groove, the upper end of the lower die base is connected with an upper die, and the lower end face of the upper die is fixedly connected with a semi-circular-ring-shaped die core.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a multi-section elbow mold. Background Technique

[0002] A mold is various dies and tools used in industrial production to obtain required products through methods such as casting, blow molding, extrusion, die casting, or forging, smelting, stamping, etc. In short, a mold is a tool for making formed articles. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the outer shape of articles through the change of the physical state of the formed material. It is known as the "mother of industry" and is a tool that makes a blank into a workpiece with a specific shape and size under the action of external force. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting, and the forming processing of compression molding or casting of products such as engineering plastics, rubber, and ceramics. A mold has a specific contour or inner cavity shape. Applying a contour shape with a cutting edge can cause the blank to be separated along the contour line (blanking). Applying the inner cavity shape can enable the blank to obtain a corresponding three-dimensional shape.

[0003] For example, the authorized announcement number is CN 210936502 U, an aluminum round tube mold with small ribs, including a matching upper mold and a lower mold; an upper positioning block is inlaid at the bottleneck in the upper mold. The inner end face of the upper positioning block is fixed in the upper mold by screws. There are two feed holes opposite to each other between the inner hole core head and the upper mold. There are two bridges connecting the inner hole core head and the inner wall of the upper mold beside the two feed holes. An inner hole core head working belt is arranged between the feed hole and the inner hole core head; a lower positioning block is inlaid at the center of the lower mold. A welding chamber for solidifying liquid aluminum is arranged at the outlet of the inner hole core head. A forming working belt for discharging is arranged between the welding chamber and the outlet end of the inner hole core head. In the aluminum round tube mold with small ribs of the utility model, the inner hole core head with small ribs is fixedly installed inside the mold. During the extrusion process, the impact force of the liquid aluminum on the inner hole core head is dispersed, so that the inner diameter size meets the tolerance requirements, improving the yield rate of products and the output of aluminum tubes and reducing the production cost.

[0004] Since there are many existing elbow models, a set of molds needs to be developed according to different angle sizes, resulting in a large number of molds occupying production space. At the same time, different molds need to be replaced during the production of different elbows, affecting production efficiency. Therefore, there is an urgent need in the market to develop a multi-section elbow mold to help people solve existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-section elbow mold to solve the problem proposed in the above background technique that since there are many existing elbow models, a set of molds needs to be developed according to different angle sizes, resulting in a large number of molds occupying production space. At the same time, different molds need to be replaced during the production of different elbows, affecting production efficiency.

[0006] To achieve the above object, the utility model provides the following technical solutions: a multi-section elbow mold, including a lower mold base and an upper mold. A semi-circular ring-shaped mold groove is provided on the upper end surface of the lower mold base. On both sides of the middle part inside the lower mold base and at the lower end of the semi-circular ring-shaped mold groove, first telescopic grooves are provided. A connecting groove is provided between the two first telescopic grooves. A second telescopic groove is connected between the middle part of the connecting groove and the upper end surface of the lower mold base. A push rod is provided inside the connecting groove. A connecting rod is connected between the push rods of the two connecting grooves. A linkage rod is provided inside the second telescopic groove. The upper end of the lower mold base is connected with the upper mold, and a semi-circular ring-shaped mold core is fixedly connected to the lower end surface of the upper mold.

[0007] Preferably, a first semi-casting hole is communicated between the upper middle part of one side end surface of the lower mold base and the semi-circular ring-shaped mold groove, and a second semi-casting hole is communicated between the upper middle part of one side end surface of the upper mold and the semi-circular ring-shaped mold core.

[0008] Preferably, a spring is provided inside the first telescopic groove at the lower end of the push rod.

[0009] Preferably, the connecting rod is placed inside the connecting groove.

[0010] Preferably, the upper end of the linkage rod extends out of the upper end surface of the lower mold base, and the lower end of the linkage rod extends into the connecting groove and is fixedly connected to the upper end of the connecting rod.

[0011] Preferably, guide grooves are provided at the front and rear ends of both sides of the upper end surface of the lower mold base, and guide rods are fixedly connected to the front and rear ends of both sides of the lower end surface of the upper mold.

[0012] Preferably, the lower ends of the four guide rods are respectively inserted into the four guide grooves.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In this utility model, through the settings of a semi-circular ring-shaped die groove and a semi-circular ring-shaped die core, a semi-circular ring-shaped die groove is provided on the upper end surface of the lower die base. The upper end of the lower die base is connected to an upper die. The lower end surface of the upper die is fixedly connected to a semi-circular ring-shaped die core. A first semi-pouring hole communicates between the upper middle part of one side end surface of the lower die base and the semi-circular ring-shaped die groove. A second semi-pouring hole communicates between the upper middle part of one side end surface of the upper die and the semi-circular ring-shaped die core. When the lower die base and the upper die are closed, the first semi-pouring hole and the second semi-pouring hole are closed to form a circular pouring hole. Raw materials are injected into the interior of the die through the circular pouring hole. The semi-circular ring-shaped die core is inserted into the interior of the semi-circular ring-shaped die groove, so that a circular iron ring with a semi-circular arc cross-section is formed after pouring. By closing and welding two circular iron rings with a semi-circular arc cross-section, after obtaining an annular pipe, it can be cut into sub-pieces at different angles according to the requirements of the part drawing. Multiple structural bent pipes can be realized by welding the sub-pieces. One set of dies can realize complex bent pipes with various angular structures, saving costs, reducing development time and the number of dies, effectively improving the rapid realization of products, and facilitating the management of the die library.

[0015] In this utility model, through the setting of a push rod, the upper end of the linkage rod extends out of the upper end surface of the lower die base. The lower end of the linkage rod extends into the connection groove and is fixedly connected to the upper end of the connecting rod. When the upper die descends and closes with the lower die base, the lower end surface of the upper die presses down on the linkage rod, causing the linkage rod to descend and retract into the second telescopic groove. At the same time, the connecting rod is pushed to descend. The connecting rod drives two push rods to retract into the first telescopic groove and compress the spring at the same time, so that the upper end surface of the push rod is closed with the inner end surface of the semi-circular ring-shaped die groove. When the pouring is completed, the upper die is lifted. The spring pushes the push rod, so that the two push rods synchronously push the circular iron ring with a semi-circular arc cross-section to lift, facilitating the taking out of the circular iron ring with a semi-circular arc cross-section from the lower die base.

[0016] In this utility model, through the setting of a guide rod, guide grooves are provided at the front and rear ends on both sides of the upper end surface of the lower die base. Guide rods are fixedly connected to the front and rear ends on both sides of the lower end surface of the upper die. The lower ends of the four guide rods are respectively inserted into the interiors of the four guide grooves. Through the lifting and lowering of the guide rods in the guide grooves, the accuracy of the closing of the lower die base and the upper die is ensured. Description of the Drawings

[0017] Figure 1 is the front view of the multi-section die for bent pipes of the present utility model;

[0018] Figure 2 is the side view of the present utility model;

[0019] Figure 3 is the main cross-sectional view of the guide groove of the present utility model;

[0020] Figure 4 is the main cross-sectional view of the connection groove of the present utility model.

[0021] In the figure: 1. Lower die base; 101. Semi-circular ring-shaped die groove; 102. First telescopic groove; 103. Connecting groove; 104. Second telescopic groove; 105. Guide groove; 106. First half-pouring hole; 2. Push rod; 201. Spring; 202. Connecting rod; 203. Link rod; 3. Upper die; 301. Semi-circular ring-shaped die core; 302. Guide rod; 303. Second half-pouring hole. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figures 1-4 , an embodiment provided by the present invention: a multi-section die for bent pipes, including a lower die base 1 and an upper die 3. A semi-circular ring-shaped die groove 101 is provided on the upper end face of the lower die base 1. On both sides of the middle part inside the lower die base 1 and at the lower end of the semi-circular ring-shaped die groove 101, first telescopic grooves 102 are provided. A connecting groove 103 is provided between the two first telescopic grooves 102. A second telescopic groove 104 is connected between the middle part of the connecting groove 103 and the upper end face of the lower die base 1. A push rod 2 is provided inside the connecting groove 103. A connecting rod 202 is connected between the push rods 2 of the two connecting grooves 103. A link rod 203 is provided inside the second telescopic groove 104. The upper end of the lower die base 1 is connected with an upper die 3. A semi-circular ring-shaped die core 301 is fixedly connected to the lower end face of the upper die 3.

[0024] A first half-pouring hole 106 is communicated between the upper middle part of one side end face of the lower die base 1 and the semi-circular ring-shaped die groove 101. A second half-pouring hole 303 is communicated between the upper middle part of one side end face of the upper die 3 and the semi-circular ring-shaped die core 301. When the lower die base 1 and the upper die 3 are closed, the first half-pouring hole 106 and the second half-pouring hole 303 are closed to form a circular pouring hole. Raw materials are injected into the die through the circular pouring hole. The semi-circular ring-shaped die core 301 is inserted into the semi-circular ring-shaped die groove 101, so that a circular iron ring with a semi-circular arc cross-section is formed after pouring. By closing and welding the two circular iron rings with semi-circular arc cross-sections, an annular pipe can be obtained. Then, according to the requirements of the part drawing, it can be cut into sub-pieces at different angles. By welding the sub-pieces, various structural bent pipes can be realized. A set of dies can realize complex bent pipes with various angle structures, saving costs, reducing development time and the number of dies, effectively improving the rapid realization of products, and facilitating the management of the die library.

[0025] A spring 201 is provided at the lower end of the push rod 2 inside the first telescopic groove 102, so that the push rod 2 can be retracted into the first telescopic groove 102 and compress the spring 201.

[0026] The connecting rod 202 is placed inside the connecting groove 103, and the synchronization of the activities of the two push rods 2 is maintained through the connecting rod 202.

[0027] The upper end of the linkage rod 203 extends out of the upper end face of the lower die base 1, and the lower end of the linkage rod 203 extends into the connecting groove 103 and is fixedly connected to the upper end of the connecting rod 202. When the upper die 3 descends and closes with the lower die base 1, the lower end face of the upper die 3 presses down on the linkage rod 203, causing the linkage rod 203 to descend and retract into the second retractable groove 104. At the same time, the connecting rod 202 is pushed downward, and the two push rods 2 are driven by the connecting rod 202 to retract into the first retractable groove 102 and compress the spring 201, so that the upper end face of the push rod 2 is closed with the inner end face of the semi-circular ring-shaped die groove 101. When the pouring is completed, the upper die 3 is lifted, and the push rod 2 is pushed by the spring 201, so that the two push rods 2 synchronously push the semi-circular cross-section circular iron ring to lift, facilitating the removal of the semi-circular cross-section circular iron ring from the lower die base 1.

[0028] Guide grooves 105 are provided at the front and rear ends on both sides of the upper end face of the lower die base 1, and guide rods 302 are fixedly connected to the front and rear ends on both sides of the lower end face of the upper die 3.

[0029] The lower ends of the four guide rods 302 are respectively inserted into the four guide grooves 105, and the accuracy of the closing of the lower die base 1 and the upper die 3 is ensured by the lifting and lowering of the guide rods 302 in the guide grooves 105.

[0030] Working principle: When in use, a semi-circular ring-shaped die groove 101 is arranged on the upper end surface of the lower die base 1. The upper end of the lower die base 1 is connected with an upper die 3. A semi-circular ring-shaped die core 301 is fixedly connected to the lower end surface of the upper die 3. A first semi-casting hole 106 is communicated between the middle of the upper part of one side end surface of the lower die base 1 and the semi-circular ring-shaped die groove 101. A second semi-casting hole 303 is communicated between the middle of the upper part of one side end surface of the upper die 3 and the semi-circular ring-shaped die core 301. When the lower die base 1 and the upper die 3 are closed, the first semi-casting hole 106 and the second semi-casting hole 303 are closed to form a circular casting hole. Raw materials are injected into the interior of the die through the circular casting hole. The semi-circular ring-shaped die core 301 is inserted into the interior of the semi-circular ring-shaped die groove 101, so that a circular iron ring with a semi-circular arc cross-section is formed after casting. By closing and welding two circular iron rings with semi-circular arc cross-sections, an annular pipe can be obtained. Then, according to the requirements of the part drawing, it can be cut into sub-pieces at different angles. The sub-pieces can be welded to realize various structural bent pipes. One set of dies can realize complex bent pipes with various angle structures, saving costs, reducing development time and the number of dies, effectively improving the rapid realization of products, facilitating the management of the die library. On both sides of the middle part inside the lower die base 1 and at the lower end of the semi-circular ring-shaped die groove 101, first telescopic grooves 102 are arranged. A connecting groove 103 is arranged between the two first telescopic grooves 102. A second telescopic groove 104 is connected between the middle of the connecting groove 103 and the upper end surface of the lower die base 1. A push rod 2 is arranged inside the connecting groove 103. A connecting rod 202 is connected between the push rods 2 of the two connecting grooves 103. A linkage rod 203 is arranged inside the second telescopic groove 104. The upper end of the linkage rod 203 extends out of the upper end surface of the lower die base 1. The lower end of the linkage rod 203 extends into the connecting groove 103 and is fixedly connected to the upper end of the connecting rod 202. When the upper die 3 descends and closes with the lower die base 1, the lower end surface of the upper die 3 presses down the linkage rod 203, so that the linkage rod 203 descends and retracts into the second telescopic groove 104. At the same time, the connecting rod 202 is pushed to descend. The two push rods 2 are driven by the connecting rod 202 to retract into the first telescopic grooves 102 and compress the springs 201, so that the upper end surface of the push rod 2 is closed with the inner end surface of the semi-circular ring-shaped die groove 101. When the casting is completed, the upper die 3 is lifted. The push rod 2 is pushed by the spring 201, so that the two push rods 2 synchronously push the circular iron ring with a semi-circular arc cross-section to lift, facilitating the taking out of the circular iron ring with a semi-circular arc cross-section from the lower die base 1.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A multi-section mold for bending a pipe, comprising a lower mold base (1) and an upper mold (3), characterized in that: The upper end surface of the lower die base (1) is provided with a semicircular ring die groove (101), first telescopic grooves (102) are provided on both sides of the middle part of the lower die base (1) and at the lower end of the semicircular ring die groove (101), a connecting groove (103) is provided between the two first telescopic grooves (102), a second telescopic groove (104) is connected between the middle part of the connecting groove (103) and the upper end surface of the lower die base (1), a push rod (2) is provided inside the connecting groove (103), a connecting rod (202) is connected between the push rods (2) of the two connecting grooves (103), a linkage rod (203) is provided inside the second telescopic groove (104), the upper end of the lower die base (1) is connected to an upper die (3), and the lower end surface of the upper die (3) is fixedly connected to a semicircular ring die core (301).

2. The multi-section pipe bending die according to claim 1, characterized in that: A first half casting hole (106) is connected between the upper middle portion of the end surface of one side of the lower die seat (1) and the semicircular ring die groove (101), and a second half casting hole (303) is connected between the upper middle portion of the end surface of one side of the upper die (3) and the semicircular ring die core (301).

3. The multi-section pipe bending die according to claim 1, characterized in that: A spring (201) is arranged at the lower end of the push rod (2) inside the first telescopic groove (102).

4. The multi-section pipe bending die according to claim 1, characterized in that: The connecting rod (202) is placed inside the connecting groove (103).

5. The multi-section pipe bending die according to claim 1, characterized in that: The upper end of the linkage rod (203) extends out of the upper end surface of the lower die base (1), and the lower end of the linkage rod (203) extends into the interior of the connecting groove (103) and is fixedly connected to the upper end of the connecting rod (202).

6. The multi-section pipe bending die according to claim 1, characterized in that: Guide grooves (105) are provided at both front and rear ends of the upper end surface of the lower die seat (1), and guide rods (302) are fixedly connected at both front and rear ends of the lower end surface of the upper die (3).

7. The multi-section pipe bending die according to claim 6, characterized in that: The lower ends of the four guide rods (302) are respectively inserted into the four guide grooves (105).

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