Two-roller extrusion forming device for internal tooth pipe

Abstract

The utility model discloses an internal tooth pipe two-roller extrusion forming device, which relates to the technical field of pipeline forming, and comprises a die assembly, a pipe pushing assembly and an extrusion assembly which are arranged in sequence, the die assembly comprises a core rod rotationally connected to a supporting mechanism, the core rod is connected with a rotary power device, and a core rod is arranged at the tail end of the core rod. The pipe pushing assembly comprises a pushing plate connected with a walking power device, a through hole in sliding connection with the core rod is formed in the pushing plate, the extrusion assembly comprises a sliding seat connected with a back-and-forth driving device, an upper roller and a lower roller which are arranged in an up-down mirror symmetry mode are rotationally connected to the sliding seat, and grooves formed in the circumferential directions of the upper roller and the lower roller are formed in the upper roller and the lower roller. The groove comprises a working section and a rotating section, and the working section and the rotating section are gently connected through a connecting section. The two-roller extrusion forming device for the internal tooth pipe, which adopts the structure, is low in equipment cost, stable in product quality, high in working efficiency and capable of realizing continuous extrusion forming of a long pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline forming technical field especially is concerned with a kind of inner tooth pipe two-roll extrusion forming device. BACKGROUND

[0002] The existing inner tooth pipe forming technology mostly adopts swaging method, although the product quality of swaging method production is stable, product size precision is high, but swaging equipment investment is big, about 500-800 million yuan of equipment investment is needed, mould cost is high, mould cost is about 5-10 million yuan, and swaging production method can only short pipe forming, cannot carry out long pipe forming, inner tooth pipe production process needs to cut long pipe into short pipe first, then can be formed on swaging equipment Inner tooth pipe forming processing, process link is more, production efficiency is low.And in the present cold extrusion production method, although cold extrusion equipment investment is small, only 20-30 million yuan is needed, mould cost is low, but it is short pipe forming, production efficiency is low and quality is unstable.

[0003] To solve the above problems, an inner tooth pipe two-roll extrusion forming device with low equipment cost, high production efficiency and stable quality is needed to fill the gap of domestic inner tooth pipe metal pipe cold working deformation. SUMMARY

[0004] The utility model aims at providing an inner tooth pipe two-roll extrusion forming device, which can reduce equipment cost, improve production efficiency and product quality stability.

[0005] To achieve the above object, the utility model provides an inner tooth pipe two-roll extrusion forming device, which comprises mould assembly, push tube assembly and extrusion assembly arranged in sequence, the mould assembly comprises core rod rotatably connected to supporting mechanism, the core rod is connected with rotary power device, the tail end of the core rod is provided with core rod, the push tube assembly comprises push plate connected with walking power device, the push plate is provided with through hole slidably connected with the core rod, the extrusion assembly comprises sliding seat connected with reciprocating drive device, the sliding seat is rotatably connected with upper roller and lower roller arranged in upper and lower mirror image, recesses are arranged on the upper roller and the lower roller along the circumferential direction, the recess comprises working section and rotary section, the groove depth of the working section is less than the groove depth of the rotary section, the working section and the rotary section are gently connected through connecting section, and the aperture between the two recesses is arranged opposite to the core rod.

[0006] Preferably, the cross-sectional dimension of the core rod gradually decreases from the end far away from the core rod to the end close to the core rod, and the minimum diameter of the core rod is equal to the outer diameter of the core rod.

[0007] Preferably, the core rod is connected with the supporting mechanism through a chuck, and the chuck is rotatably connected with the supporting mechanism.

[0008] Preferably, the rotating power device comprises a first motor, an output end of the first motor is connected with a first sprocket, the first sprocket is connected with a second sprocket through a first chain, and the second sprocket is fixedly connected with the chuck.

[0009] Preferably, the walking power device comprises two support plates arranged along the length direction of the core rod, each of the two support plates is provided with a connecting hole in sliding connection with the core rod, two guide screws are arranged between the two support plates and are arranged in parallel with the core rod, the two guide screws are respectively adaptedly connected with two threaded holes on the push plate, and the two guide screws are connected with a rotating driving device.

[0010] Preferably, a mounting disc is arranged on one side of the push plate close to the extrusion assembly, and the mounting disc is provided with a slot coaxially arranged with the core rod.

[0011] Preferably, the rotating driving device comprises a second motor, an output shaft of the second motor is connected with a third sprocket, the third sprocket is connected with a fourth sprocket through a second chain, the fourth sprocket is fixedly connected with a second gear, one end of each of the two guide screws is provided with a first gear, and the two first gears are meshingly connected with the second gear.

[0012] Preferably, the back-and-forth driving device comprises a guide slide rail, a hinge rod, a rotating disc and a third motor, the guide slide rail is parallel to the core rod and is adaptedly connected with the sliding seat, one end of the hinge rod is rotationally connected with the sliding seat, the other end of the hinge rod is rotationally connected with an eccentric shaft on the rotating disc, the rotating disc is fixedly connected with a rotating shaft on a fixing base, and the rotating shaft is connected with the third motor.

[0013] Preferably, the core rod is detachably connected with the core bar.

[0014] Therefore, the inner tooth tube two-roll extrusion forming device with the above structure has the following beneficial effects:

[0015] 1. Low equipment cost: the mold-core bar with easy abrasion has low cost, thereby effectively reducing the equipment cost during the production of the inner tooth tube; the upper roller and the lower roller in the utility model can directly use the cold rollers on the original cold rolling machine, or can be directly replaced by rollers with smaller diameter, thereby reducing the equipment cost of the upper roller and the lower roller.

[0016] 2. High production efficiency: the pipe material is pushed by the push plate to move to realize the long pipe forming of the inner tooth tube, thereby increasing the production efficiency of the inner tooth tube and overcoming the problem of low production efficiency of the short pipe forming of the rotary forging equipment; the back-and-forth stroke and speed of the upper roller and the lower roller driven by the back-and-forth driving device can be adjusted to improve the production efficiency of the inner tooth tube forming.

[0017] 3. Stable product quality: the grooves on the upper roller and the lower roller realize the wrapping and extrusion of the pipe material, the rotation of the pipe material driven by the core rod realizes the all-around extrusion forming of the pipe material, thereby ensuring the stability of the product quality; the core rod can be customized with high precision molds, so that the metal plastic deformation rebound of the pipe material in the cold rolling process is minimized, the size accuracy is effectively ensured, and the product quality is further ensured.

[0018] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structural schematic view of an embodiment of the utility model two-roller extrusion forming device for inner tooth pipe.

[0020] Fig. 2 It is a structural schematic view of another view of an embodiment of the utility model two-roller extrusion forming device for inner tooth pipe.

[0021] REFERENCE NUMERALS

[0022] 1, core rod; 2, chuck; 3, rotary power device; 31, first motor; 32, first sprocket; 33, first chain; 34, second sprocket; 4, core rod; 5, push plate; 6, support plate; 7, guide screw; 8, rotary drive device; 81, second motor; 82, third sprocket; 83, second chain; 84, fourth sprocket; 85, second gear; 86, first gear; 9, mounting disc; 10, sliding seat; 11, reciprocating drive device; 111, guide sliding rail; 112, hinge rod; 113, turntable; 114, third motor; 115, eccentric shaft; 116, rotating shaft; 12, upper roller; 13, lower roller; 14, groove. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments.

[0024] EMBODIMENT

[0025] As shown in the drawings, Figs. 1-2 A two-roller extrusion forming device for inner tooth pipe, comprising a mold assembly, a pipe pushing assembly and an extrusion assembly arranged in sequence. The mold assembly comprises a core rod 1 rotatably connected to a support mechanism, the core rod 1 is connected to the support mechanism through a chuck 2, the chuck 2 is rotatably connected to the support mechanism, and the chuck 2 enables the core rod 1 to stably rotate on the support mechanism. The core rod 1 is connected with a rotary power device 3, and the rotary power device 3 can drive the core rod 1 to rotate. The rotary power device 3 comprises a first motor 31, the output end of the first motor 31 is connected with a first sprocket 32, the first sprocket 32 is connected with a second sprocket 34 through a first chain 33, and the second sprocket 34 is fixedly connected with the chuck 2.

[0026] The end of the core rod 1 is provided with a core rod 4, and the core rod and the core rod are detachably connected. The detachable connection mode can be that the core rod is provided with an internal thread, and one end of the core rod is provided with an external thread matched with the internal thread structure. The cross-sectional size of the core rod 1 gradually decreases from the end away from the core rod 4 to the end close to the core rod 4, and the minimum diameter of the core rod 1 is equal to the outer diameter of the core rod 4. The cross-sectional size design of the core rod 1 can reduce the overall weight of the core rod 1, thereby avoiding the bending of the core rod 1 due to gravity after long-term use. In addition, the cross-sectional size design of the core rod 1 can realize smooth connection of the core rod 1 and the core rod 4.

[0027] The push tube assembly includes a push plate 5 connected with the walking power device. The push plate 5 is provided with a through hole in sliding connection with the core rod 1. The push plate 5 can move along the length direction of the core rod 1 under the driving of the walking power device, thereby realizing the function of pushing the pipe forward. The walking power device includes two support plates 6 arranged along the length direction of the core rod 1. The two support plates 6 are each provided with a connecting hole in sliding connection with the core rod 1. Two guide screws 7 are arranged in parallel with the core rod 1 between the two support plates 6. The two guide screws 7 are respectively connected with two threaded holes on the push plate 5, and the two guide screws 7 are connected with a rotary driving device 8. The rotary driving device 8 includes a second motor 81. The output shaft of the second motor 81 is connected with a third sprocket 82. The third sprocket 82 is connected with a fourth sprocket 84 through a second chain 83. The fourth sprocket 84 is fixedly connected with a second gear 85. One end of each of the two guide screws 7 is provided with a first gear 86. The two first gears 86 are in meshing connection with the second gear 85. The rotary driving device 8 is used to drive the guide screws 7 to rotate, thereby driving the push plate 5 to move along the length direction of the core rod 1.

[0028] The side of the push plate 5 close to the extrusion assembly is provided with a mounting disc 9. The mounting disc 9 is provided with a slot coaxially arranged with the core rod 1. The slot is used to realize positioning of the pipe, so as to ensure that the pipe can be coaxial with the core rod 4 at the end of the core rod 1 during the extrusion molding process, thereby ensuring the quality stability of the pipe after extrusion molding.

[0029] The extrusion assembly includes a sliding seat 10 connected with a reciprocating driving device 11. The reciprocating driving device 11 is used to drive the sliding seat 10 to move back and forth. The reciprocating driving device 11 includes a guide slide rail 111, a hinge rod 112, a rotating disc 113 and a third motor 114. The guide slide rail 111 is parallel to the core rod 1 and is connected with the sliding seat 10. One end of the hinge rod 112 is rotatably connected with the sliding seat 10. The other end of the hinge rod 112 is rotatably connected with an eccentric shaft 115 on the rotating disc 113. The rotating disc 113 is fixedly connected with a rotating shaft 116 on a fixed seat. The rotating shaft 116 is connected with the third motor 114.

[0030] The upper roller 12 and the lower roller 13 are rotatably connected to the slide 10 and are symmetrically arranged in upper and lower positions, and the upper roller 12 and the lower roller 13 are each provided with a groove 14 arranged along the circumferential direction thereof. The groove 14 comprises a working section and a rotating section, the groove depth of the working section is smaller than that of the rotating section, and the working section and the rotating section are connected through a connecting section. The aperture between the two grooves 14 is arranged opposite to the core rod 1, and the two grooves 14 can realize the wrapping and extrusion forming of the pipe.

[0031] In use, the pipe is inserted into the slot to realize the installation and fixation of the pipe, and then the walking power device, the reciprocating driving device and the rotating power device are started, wherein the walking power device moves the push plate 5 along the length direction of the pipe, and then pushes the pipe forward to the aperture between the two grooves 14, the reciprocating driving device 11 drives the upper roller 12 and the lower roller 13 to reciprocate along the length direction of the pipe, and the working section of the two grooves 14 contacts and rolls with the outer wall of the pipe during the reciprocating movement of the upper roller 12 and the lower roller 13, so as to realize the extrusion forming of the pipe, and the inner wall of the pipe forms the inner tooth groove which is matched with the structure of the core rod 4, when the upper roller 12 and the lower roller 13 reciprocate to the relative position of the rotating sections of the two grooves 14, the core rod is rotated by a certain angle under the driving of the rotating power device 3, so that the pipe rotates with the rotation of the core rod 1, and the pipe is extruded in all directions through the rotation, so as to overcome the defects that the pipe is not fully extruded and the product quality is unstable due to the gap between the upper roller 12 and the lower roller 13.

[0032] Therefore, the inner tooth pipe two-roller extrusion forming device with the above structure can reduce the equipment cost, improve the production efficiency and the stability of the product quality.

[0033] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model and not to limit it, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can still be modified or replaced, and these modifications or replacements cannot make the modified technical scheme deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. A two-roll extrusion forming apparatus for an internally toothed tube, characterized by: The utility model provides a kind of extrusion device, including the mould assembly, push tube assembly and extrusion assembly arranged in sequence, the mould assembly includes the core rod (1) rotationally connected on support mechanism, the core rod (1) is connected with rotating power device (3), the end of the core rod (1) is equipped with core rod (4), the push tube assembly includes the push plate (5) connected with walking power device, the push plate (5) is equipped with through hole with the core rod (1) sliding connection, the extrusion assembly includes the sliding seat (10) connected with to-and-fro drive device (11), the sliding seat (10) is rotationally connected with the upper roller (12) and lower roller (13) being arranged in upper and lower mirror image symmetry, the upper roller (12) and the lower roller (13) are all equipped with recess (14) being arranged along its circumferential direction, the recess (14) includes working section and rotation section, the groove depth of the working section is less than the groove depth of the rotation section, the working section and the rotation section are gently connected by connecting section, the aperture between two recesses (14) is arranged opposite to the core rod (1).

2. A two-roll extrusion forming device for an inner tooth tube according to claim 1, characterized in that: The cross-sectional dimension of the core rod (1) gradually decreases from one end away from the core rod (4) to one end close to the core rod (4), and the minimum diameter of the core rod (1) is equal to the outer diameter of the core rod (4).

3. A two-roll extrusion forming device for an inner tooth tube according to claim 1, characterized in that: The core rod (1) is connected with the support mechanism through the chuck (2), and the chuck (2) is rotationally connected with the support mechanism.

4. A two-roll extrusion forming device for an inner tooth tube according to claim 3, characterized in that: The rotating power device (3) includes a first motor (31), and the output end of the first motor (31) is connected with a first sprocket (32). The first sprocket (32) is connected with a second sprocket (34) through a first chain (33), and the second sprocket (34) is fixedly connected with the chuck (2).

5. The apparatus according to claim 1, wherein: The walking power device includes two support plates (6) arranged along the length direction of the core rod (1), and the two support plates (6) are both provided with a connecting hole slidingly connected with the core rod (1). Two guide screws (7) are arranged between the two support plates (6) and parallel to the core rod (1). The two guide screws (7) are respectively connected with two threaded holes on the push plate (5), and the two guide screws (7) are both connected with a rotating drive device (8).

6. A two-roll extrusion forming device for an inner tooth tube according to claim 1, characterized in that: The push plate (5) is provided with a mounting disc (9) on the side surface close to the extrusion assembly, and the mounting disc (9) is provided with a slot coaxially arranged with the core rod (1).

7. A two-roll extrusion forming device for an inner tooth tube according to claim 5, characterized in that: The rotating drive device (8) includes a second motor (81), and the output shaft of the second motor (81) is connected with a third sprocket (82). The third sprocket (82) is connected with a fourth sprocket (84) through a second chain (83), and the fourth sprocket (84) is fixedly connected with a second gear (85). One end of each of the two guide screws (7) is provided with a first gear (86), and the two first gears (86) are both meshingly connected with the second gear (85).

8. The apparatus according to claim 1, wherein: The back-and-forth driving device (11) comprises a guide slide rail (111), a hinge rod (112), a rotating disc (113) and a third motor (114), the guide slide rail (111) is parallel to the core rod (1) and is connected with the slide base (10), one end of the hinge rod (112) is rotationally connected with the slide base (10), the other end of the hinge rod (112) is rotationally connected with an eccentric shaft (115) on the rotating disc (113), the rotating disc (113) is fixedly connected with a rotating shaft (116) on a fixed base, and the rotating shaft (116) is connected with the third motor (114).

9. The apparatus according to claim 1, wherein: The core rod is detachably connected with the core rod.

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