Novel buffering die for cold-drawn steel pipe

Abstract

The utility model relates to a novel buffer die for a cold-drawn steel pipe, which comprises a lower die provided with a lifting mechanism. And the lifting mechanism comprises an upper mold, threaded columns are fixed to the left side and the right side of the bottom of the upper mold correspondingly, a mounting cavity is formed in the lower mold, threaded cylinders are rotationally connected to the left side and the right side of the inner bottom wall of the mounting cavity correspondingly, and the threaded columns are in threaded connection with the interiors of the threaded cylinders. According to the novel buffer mold for the cold-drawn steel pipe, by arranging the lifting mechanism, during demolding, a cover plate is taken down firstly, then a rotating rod is rotated to drive a driving gear to rotate, then a driven gear can drive the rotating rod to rotate, and therefore two second bevel gears drive two first bevel gears to rotate correspondingly, and two threaded cylinders can rotate synchronously; and therefore, the threaded column is moved out of the threaded cylinder to push the upper mold to move upwards, the upper mold and the lower mold can be separated, a formed steel pipe can be conveniently taken out, and the demolding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a new buffer mold for cold-drawn steel pipes. Background Art

[0002] Seamless steel pipe is made by perforating a whole round steel. There is no weld on the surface of the steel pipe, which is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, jacking pipe, etc.

[0003] According to Chinese patent publication number CN212329581U, a device for producing thin-walled seamless steel pipes by cold drawing and expansion tubes without an external die is disclosed. The device comprises an inner mold shell A and an inner mold shell B. The outer side wall of the inner mold shell B is inlaid with a spring gasket, and an extrusion spring is elastically connected to the spring gasket.

[0004] During the use of the seamless steel pipe mold, it is necessary to push the U-shaped connecting rod through the T-shaped push rod to push the ring body upward during demolding, so as to push the formed steel pipe out from the outlet. The formed steel pipe will produce greater resistance with the inner wall of the mold, which makes it difficult to push the steel pipe out, affecting the efficiency of demolding. Therefore, a new buffer mold for cold-drawn steel pipes is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a new buffer die for cold-drawn steel pipes, which has the advantages of high demoulding efficiency and solves the problem of low demoulding efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new buffer die for cold-drawn steel pipes, comprising a lower die, on which a lifting mechanism is installed.

[0007] The lifting mechanism includes an upper mold, threaded columns are fixed on the left and right sides of the bottom of the upper mold, an installation cavity is opened inside the lower mold, threaded cylinders are rotatably connected on the left and right sides of the bottom wall of the installation cavity, the threaded columns are threadedly connected to the inside of the threaded cylinder, a first bevel gear is fixed to the outside of the threaded cylinder, a fixing plate is fixed to the inside of the installation cavity, a rotating rod is rotatably connected to the inside of the fixing plate, second bevel gears are fixed on the left and right sides of the rotating rod, the second bevel gear is meshed with the first bevel gear, a driven gear is fixed to the outside of the rotating rod, the bottom of the lower mold is rotatably connected to a rotating rod, a driving gear is fixed to the top of the rotating rod, and the driving gear is meshed with the driven gear.

[0008] Furthermore, a molding cavity is provided on one side opposite to the upper mold and the lower mold, and the molding cavity is a semicircular structure.

[0009] Furthermore, buffer strips are fixed on both left and right sides of the bottom of the upper mold, and slots are opened on both left and right sides of the top of the lower mold. The buffer strips match the slots, and the upper mold is attached to the top of the lower mold.

[0010] Furthermore, a cover plate is attached to the back of the upper mold and the lower mold, and mounting blocks are fixed on the left and right sides of the lower mold and the upper mold and the four corners of the cover plate. Mounting holes are opened inside the mounting blocks, and a mold core is fixedly connected to the front of the cover plate, and the mold core is located at the center of the molding cavity.

[0011] Furthermore, a rotating block is fixed to the bottom of the rotating rod, and the rotating block is located below the lower mold.

[0012] Furthermore, a sliding hole located at the top of the installation cavity is opened inside the lower mold, the number of the sliding holes is the same as the number of the threaded columns, and the threaded columns are slidably connected inside the sliding holes.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The new buffer die for cold-drawn steel pipe is provided with a lifting mechanism. When demoulding, the cover plate is first removed, and then the rotating rod is rotated to drive the driving gear to rotate, so that the driven gear can drive the rotating rod to rotate, so that the two second bevel gears respectively drive the two first bevel gears to rotate, so that the two threaded barrels can rotate synchronously, so that the threaded column is moved out of the threaded barrel to push the upper die to move upward, so that the upper die and the lower die can be separated, thereby facilitating the removal of the formed steel pipe and improving the efficiency of demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0016] Figure 2 It is a partial side view of the structural mold of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the structural cover plate and the mold core of the utility model.

[0018] In the figure: 1. lower mold; 2. upper mold; 3. molding cavity; 4. mold core; 5. buffer strip; 6. threaded column; 7. threaded cylinder; 8. first bevel gear; 9. second bevel gear; 10. rotating rod; 11. driven gear; 12. rotating rod; 13. driving gear; 14. fixing plate; 15. mounting cavity; 16. sliding hole; 17. cover plate; 18. mounting block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 A new buffer die for cold-drawn steel pipe in this embodiment includes a lower die 1, on which a lifting mechanism is installed.

[0021] The lifting mechanism includes an upper mold 2, threaded columns 6 are fixed on the left and right sides of the bottom of the upper mold 2, a mounting cavity 15 is opened inside the lower mold 1, and threaded cylinders 7 are rotatably connected on the left and right sides of the bottom wall of the mounting cavity 15, the threaded columns 6 are threadedly connected to the inside of the threaded cylinder 7, and a first bevel gear 8 is fixed to the outside of the threaded cylinder 7, a fixing plate 14 is fixed to the inside of the fixing plate 14, and a rotating rod 10 is rotatably connected to the inside of the fixing plate 14, and a second bevel gear 9 is fixed to the left and right sides of the rotating rod 10, and the second bevel gear 9 is meshed with the first bevel gear 8, and the outside of the rotating rod 10 is fixed There is a driven gear 11, and the bottom of the lower mold 1 is rotatably connected to a rotating rod 12, and a driving gear 13 is fixed to the top of the rotating rod 12, and the driving gear 13 is meshed with the driven gear 11. A rotating block is fixed to the bottom of the rotating rod 12, and the rotating block is located below the lower mold 1. A molding cavity 3 is provided on the opposite side of the upper mold 2 and the lower mold 1. The molding cavity 3 is a semicircular structure, and buffer strips 5 are fixed on the left and right sides of the bottom of the upper mold 2. A card slot is provided on the left and right sides of the top of the lower mold 1, and the buffer strip 5 matches the card slot, and the upper mold 2 fits on the top of the lower mold 1.

[0022] It should be noted that the buffer strip 5 is made of rubber. The buffer strip 5 plays a buffering role when the upper mold 2 and the lower mold 1 are closed, and at the same time can increase the sealing performance.

[0023] In this embodiment, a cover plate 17 is attached to the back of the upper mold 2 and the lower mold 1, and mounting blocks 18 are fixed on the left and right sides of the lower mold 1 and the upper mold 2 and the four corners of the cover plate 17. A mounting hole is opened inside the mounting block 18, and a core 4 is fixedly connected to the front of the cover plate 17, and the core 4 is located at the center position in the molding cavity 3.

[0024] It can be understood that, through the mounting holes opened on the mounting block 18, the cover plate 17 can be fixed to the back of the lower mold 1 and the upper mold 2 with the help of bolts and nuts, so that the core 4 can be inserted into the center of the molding cavity 3, so that the closed molding cavity 3 forms an annular cavity.

[0025] In this embodiment, a sliding hole 16 is opened inside the lower mold 1 and located at the top of the installation cavity 15 . The number of the sliding holes 16 is the same as the number of the threaded columns 6 , and the threaded columns 6 are slidably connected inside the sliding holes 16 .

[0026] It should be noted that, the threaded column 6 is slidably connected in the sliding hole 16 , so that when the upper mold 2 is separated from the lower mold 1 , the threaded column 6 will move upward out of the sliding hole 16 .

[0027] The working principle of the above embodiment is as follows: when in use, after removing the bolts and nuts on the mounting block 18, the cover plate 17 can be removed, and the core 4 can be pulled out of the mold. Then, by rotating the rotating block to drive the rotating rod 12 to rotate, the driving gear 13 can drive the driven gear 11 to rotate, so that the rotating rod 10 drives the two second bevel gears 9 to rotate, and the first bevel gear 8 can rotate to drive the threaded barrel 7 to rotate, so that the two threaded barrels 7 can rotate synchronously, so that the threaded column 6 is moved out of the threaded barrel 7 to push the upper mold 2 to move upward, so that the upper mold 2 and the lower mold 1 are separated, thereby facilitating the removal of the formed steel pipe and improving the demoulding efficiency.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new buffer die for cold-drawn steel pipes, comprising a lower die (1), wherein a lifting mechanism is installed on the lower die (1); Features: The lifting mechanism comprises an upper mold (2), threaded columns (6) are fixed on both left and right sides of the bottom of the upper mold (2), a mounting cavity (15) is provided inside the lower mold (1), threaded cylinders (7) are rotatably connected on both left and right sides of the inner bottom wall of the mounting cavity (15), the threaded columns (6) are threadedly connected to the inside of the threaded cylinder (7), a first bevel gear (8) is fixed to the outside of the threaded cylinder (7), a fixing plate (14) is fixed to the inside of the mounting cavity (15), and the The fixed plate (14) is rotatably connected to a rotating rod (10) inside, and second bevel gears (9) are fixed to the left and right sides of the rotating rod (10), and the second bevel gear (9) is meshed with the first bevel gear (8). A driven gear (11) is fixed to the outside of the rotating rod (10), and the bottom of the lower mold (1) is rotatably connected to a rotating rod (12), and a driving gear (13) is fixed to the top of the rotating rod (12), and the driving gear (13) is meshed with the driven gear (11).

2. A new buffer die for cold-drawn steel pipe according to claim 1, characterized in that: A molding cavity (3) is provided on one side opposite to the upper mold (2) and the lower mold (1), and the molding cavity (3) is a semicircular structure.

3. The new buffer die for cold-drawn steel pipe according to claim 1, characterized in that: Buffer strips (5) are fixed on both the left and right sides of the bottom of the upper mold (2), and slots are opened on both the left and right sides of the top of the lower mold (1), the buffer strips (5) match the slots, and the upper mold (2) is attached to the top of the lower mold (1).

4. The new buffer die for cold-drawn steel pipe according to claim 2, characterized in that: The backs of the upper mold (2) and the lower mold (1) are bonded with a cover plate (17); the left and right sides of the lower mold (1) and the upper mold (2) and the four corners of the cover plate (17) are all fixed with mounting blocks (18); mounting holes are provided inside the mounting blocks (18); the front of the cover plate (17) is fixedly connected with a mold core (4); and the mold core (4) is located at the center of the molding cavity (3).

5. The new buffer die for cold-drawn steel pipe according to claim 1, characterized in that: A rotating block is fixed at the bottom of the rotating rod (12), and the rotating block is located below the lower mold (1).

6. The new buffer die for cold-drawn steel pipe according to claim 1, characterized in that: The lower mold (1) is provided with a sliding hole (16) located at the top of the installation cavity (15). The number of the sliding holes (16) is the same as the number of the threaded columns (6). The threaded columns (6) are slidably connected inside the sliding holes (16).

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