Continuous extrusion device and continuous extrusion forming system

Abstract

The invention discloses a continuous extrusion device and a continuous extrusion forming system, and relates to the technical field of metal forming. By designing the size assembling relation among the diameter d of the rod material, the end face width W of the material stopping block, the notch width W1 of the annular groove, the end face height H of the material stopping block and the height delta of the boss, the contact area between the upset rod material and the annular groove can be improved, and the linear speed of the rod material is very close to that of the extrusion wheel; therefore, the slipping amount between the upset rod material and the annular groove can be reduced, the temperature of the rod material can be reduced, the defects of extruded products are reduced, meanwhile, thermal damage to a cavity, an extrusion wheel and the like caused by friction heat generated by slipping is avoided, and the service life of a tool and a die can be prolonged. Due to the fact that the slipping amount between the rod material and the annular groove is reduced, correspondingly, the energy consumption of rod material extrusion is reduced, the production cost is greatly reduced, and meanwhile the extrusion forming efficiency is improved. The continuous extrusion forming system comprises the continuous extrusion device.

Description

Technical Field

[0001] The present invention belongs to the field of metal processing, relates to extrusion forming technology, and particularly relates to a continuous extrusion device and a continuous extrusion forming system. Background Art

[0002] Continuous extrusion is a process that uses a rotatable extrusion wheel with an annular groove to drive the billet forward through the frictional force between the groove and the billet (rod stock) when the extrusion wheel rotates. When the billet moves to the stop block, the billet enters the cavity through the cavity feed port and is extruded into various shaped required products through the die installed in the cavity. Since the billet fills the groove of the extrusion wheel after the upsetting section, the cross-sectional area of the billet in the groove changes significantly, resulting in the linear velocity of the billet being lower than that of the extrusion wheel, and obvious slippage will occur between the billet and the side wall of the groove of the extrusion wheel. This will not only reduce the billet conveying efficiency, increase the extrusion energy consumption, and reduce the extrusion forming efficiency, but also generate a large amount of frictional heat during the slippage process, causing the billet to heat up. Excessive slippage will cause the billet temperature to be too high, resulting in internal quality defects of the billet extrusion product; at the same time, the slippage frictional heat will also damage the extrusion wheel and the cavity, reducing the service life of the extrusion wheel, cavity, etc. Summary of the Invention

[0003] The purpose of the present invention is to provide a continuous extrusion device and a continuous extrusion forming system, which can reduce the slippage amount between the billet and the side wall of the groove of the extrusion wheel during continuous extrusion by controlling the end face size of the stop block, so as to solve the problems existing in the above-mentioned prior art that during continuous extrusion, the slippage between the billet and the side wall of the groove of the extrusion wheel is obvious, which will not only increase the extrusion energy consumption, reduce the extrusion forming efficiency, but also the slippage frictional heat will cause the billet to heat up, resulting in internal quality defects of the billet extrusion product, and will also reduce the service life of the extrusion wheel, cavity, etc.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] On the one hand, the present invention provides a continuous extrusion device, including an extrusion wheel, a stop block, a cavity and a frame. An annular groove is provided on the outer periphery of the extrusion wheel, and the extrusion wheel is installed on the frame through a main shaft; the cavity is installed on a shoe base and is located on one side of the extrusion wheel; the stop block is located outside the cavity feed port of the cavity. When the cavity and the extrusion wheel are closed, the stop block is embedded in the annular groove, and the stop block is in clearance fit with the annular groove, where:

[0006] The end face width W of the stop block = [d + (0.1 - 1.8)] mm, where d is the diameter of the rod stock to be extruded;

[0007] The groove width W1 of the annular groove = [W + (0.1 - 2)] mm;

[0008] The end face height H of the material stop block satisfies W≥(H - δ), where δ is the height of the boss of the cavity, and 0≤δ≤3mm.

[0009] In some embodiments, the boss of the cavity, the material stop block, and the cavity are integrally formed; alternatively, the material stop block is an independent part assembled with the cavity.

[0010] In some embodiments, the outer contour surface of the material stop block is an arc surface; alternatively, the outer contour surface of the material stop block is a smooth combination of a curved surface and a plane.

[0011] In some embodiments, the continuous extrusion device further includes a die, and the die is disposed in the cavity and at the inlet of the cavity.

[0012] In some embodiments, the continuous extrusion device further includes a telescopic cylinder; the boot seat is rotatably mounted on the frame; one end of the telescopic cylinder is hinged to the boot seat, and the other end of the telescopic cylinder is hinged to the frame or a base below the frame, and the telescopic cylinder is used to drive the cavity to open and close relative to the extrusion wheel.

[0013] In some embodiments, the telescopic cylinder is an oil cylinder or a pneumatic cylinder.

[0014] On the other hand, the present invention provides a continuous extrusion forming system, including a compaction wheel assembly and the above-mentioned continuous extrusion device. The compaction wheel assembly is disposed on the frame, and the compaction wheel assembly includes a compaction wheel. The compaction wheel assembly is used to press the rod material into the annular groove through the compaction wheel to establish an initial friction force between the rod material and the annular groove.

[0015] In some embodiments, the continuous extrusion forming system further includes a feeding guide plate. The feeding guide plate is located at the upper end of the cavity and is fixedly pressed on the boot seat through a pressing plate; a boss is provided on the feeding guide plate, and the boss on the feeding guide plate is in transitional connection with the boss on the cavity; the boss on the feeding guide plate has the same width as the boss on the cavity, the height δ of the boss on the feeding guide plate is 0 - 3mm, and the height δ of the boss on the feeding guide plate is 0mm - 1mm smaller than the height δ of the boss on the cavity.

[0016] In some embodiments, the continuous extrusion forming system further includes a pressing device, and the pressing device is used to press the boot seat after the cavity and the extrusion wheel are closed.

[0017] In some embodiments, the continuous extrusion forming system further includes a scraper assembly. The scraper assembly is disposed on the frame and located on the side of the extrusion wheel opposite to the cavity. The scraper assembly is used to remove the overflow material on the surface of the extrusion wheel.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] The continuous extrusion device provided by the present invention has a reasonable structural design. By designing the dimensional assembly relationship among the diameter d of the rod material, the end face width W of the stop block, the notch width W1 of the annular groove, the end face height H of the stop block, and the height δ of the convex platform, the contact area between the rod material after upsetting and the annular groove can be improved, and the linear velocity of the rod material can be made very close to the linear velocity of the extrusion wheel. Thus, the slippage amount between the rod material after upsetting and the annular groove of the extrusion wheel can be reduced, and further, the temperature of the rod material (blank) can be lowered, the defects of the extrusion product can be reduced, and at the same time, the thermal damage to the cavity, extrusion wheel, etc. caused by the frictional heat generated by slippage can be avoided, and the service life of the cavity, extrusion wheel and other tooling can be improved. Since the slippage amount between the rod material and the annular groove of the extrusion wheel is reduced, correspondingly, the extrusion energy consumption is reduced, the production cost is greatly reduced, and the quality and production efficiency of the extrusion product are improved.

[0020] The continuous extrusion forming system proposed by the present invention includes the above continuous extrusion device and has all the characteristics of the above continuous extrusion device, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a sectional view along the center line of the groove of the extrusion wheel of the continuous extrusion forming system disclosed in the embodiment of the present invention;

[0023] Figure 2 For Figure 1 a partial enlarged structural schematic diagram (retaining the partial parts of the feed guide plate, cavity, mold, cavity cover, pressing plate, extrusion wheel and shoe base);

[0024] Figure 3 For Figure 2 a sectional structural schematic diagram along A-A;

[0025] Figure 4 For Figure 2 a sectional structural schematic diagram along B-B;

[0026] Figure 5 Schematic diagram of the relationship between the size of the material stop block and the diameter of the rod stock (blank) disclosed in the embodiments of the present invention;

[0027] Figure 6 Schematic diagram of the relationship between the width of the material stop block and the width of the annular groove disclosed in the embodiments of the present invention.

[0028] In the figure, the reference numerals are: 100 - continuous extrusion forming system; 1 - extrusion wheel, 2 - annular groove, 3 - material stop block, 4 - die, 5 - cavity, 6 - compaction wheel, 7 - groove side, 8 - sealing arc surface, 9 - feed guide plate, 10 - pressing plate, 11 - frame, 12 - main shaft, 13 - compaction wheel assembly, 14 - scraper assembly, 15 - wheel surface, 16 - shoe base, 17 - shoe base pivot, 18 - pressing device, 19 - pressing device shaft, 20 - oil cylinder, 21 - base, 22 - boss, 23 - arc of the inner surface of the material stop block, 24 - surface of the boss, 25 - rod stock, 26 - actual effective driving groove, 27 - bottom material in the groove;

[0029] d - diameter of the rod stock;

[0030] W - end face width of the material stop block;

[0031] H - end face height of the material stop block;

[0032] δ - height of the boss on the cavity or the feed guide plate;

[0033] W1 - groove width of the annular groove. Specific embodiments

[0034] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] One of the purposes of the present invention is to provide a continuous extrusion device, which can reduce the slipping amount between the blank and the side wall of the extrusion wheel groove during continuous extrusion by controlling the end face size of the material stop block, so as to solve the problems existing in the prior art that during continuous extrusion, the slipping between the blank and the side wall of the extrusion wheel groove is obvious, which will not only increase the extrusion energy consumption, reduce the extrusion forming efficiency, but also the slipping friction heat will cause the blank to heat up, resulting in internal quality defects of the blank extrusion product, and also reduce the service life of the extrusion wheel, cavity, etc.

[0036] Another purpose of the present invention is to provide a continuous extrusion forming system including the above continuous extrusion device.

[0037] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1

[0039] As Figures 1 to 4 shown, in order to reduce the internal defects of the extruded product, the present embodiment provides a novel continuous extrusion device, including an extrusion wheel 1, a cavity 5, and a material blocking block 3 installed at the feed port of the cavity 5. An annular groove 2 concentric with the extrusion wheel 1 is provided on the outer periphery of the extrusion wheel 1. The extrusion wheel 1 is installed on the main shaft 12 and can be fixed to the main shaft 12 by means of key connection or the like. The main shaft 12 is rotatably installed on the frame 11 through bearings (not shown in the figure); the cavity 5 is installed on the shoe base 16, and the shoe base 16 is installed on the frame 11 and is located on one side of the extrusion wheel 1. The cavity feed port of the cavity 5 faces the extrusion wheel 1. A die 4 is provided inside the cavity feed port of the cavity 5. The material blocking block 3 is located outside the cavity feed port and is embedded in the annular groove 2 to block the rod material 25 (blank) in the annular groove 2, so that the rod material 25 (blank) enters the die 4 through the cavity feed port. In practical applications, the shoe base 16 can be adaptively replaced with other structures that can meet the installation requirements of the cavity 5. The material blocking block 3 is in clearance fit with the annular groove 2, and the design of the material blocking block 3 is as follows:

[0040] First, determine the end face width W of the material blocking block 3 according to the diameter d of the rod material 25 after passing through the upsetting section. The end face width W of the material blocking block 3 is 0.1 mm to 1.8 mm larger than the diameter d of the rod material 25, that is, W = [d + (0.1 - 1.8)] mm; at the same time, the relationship between the groove width W1 of the annular groove 2 and the end face width W of the material blocking block 3 is that W1 is greater than W, and specifically, it should satisfy W1 = [W + (0.1 - 2)] mm. As Figures 3 to 6 shown, since the rod material 25 enters the annular groove 2 after passing through the compaction wheel 6, and the rod material 25 fills the annular groove 2 after upsetting. Through the above design of the end face width W and the groove width W1, when the rod material 25 passes through the material blocking block 3, the side of the rod material 25 enters the gap between the rod material 25 and the annular groove 2. Based on this, after the extrusion wheel 1 continuously rotates, the bottom of the annular groove 2 is filled with the groove bottom material 27, and the outer contour of the groove bottom material 27 is the actual effective driving groove 26; based on the above design of the end face width W and the groove width W1, the annular groove 2 of the extrusion wheel 1 can generate sufficient effective frictional driving force on the rod material 25 (blank), and at the same time ensure that neither the rod material 25 nor the groove bottom material 27 is scratched or folded to form product quality defects, and also avoid direct friction between the side of the material blocking block 3 and the side of the annular groove 2. It should be noted that, as Figure 3 shown, the groove width W1 of the annular groove 2 is the parallel distance between the two groove sides 7 of the annular groove 2.

[0041] Secondly, make the height H of the end face of the material stop block 3 smaller than the width W of the end face of the material stop block 3, and the dimensional relationship satisfies W≥(H-δ), where δ is the height of the boss 22 of the cavity 5, and its value range is 0 to 3 mm. When δ = 0, it means that there is no boss 22 on the cavity 5 and the feed guide plate 9. The function of this design is to make the cross-sectional area formed by the actual effective driving groove 26 and the boss 22 slightly larger than the cross-sectional area of the rod material 25 after passing through the compaction wheel 6, so as to ensure that the linear velocity of the rod material 25 after upsetting is very close to the linear velocity of the annular groove 2, thereby reducing the slipping amount of the rod material 25 (blank) after upsetting, effectively reducing the temperature of the rod material 25 (blank), reducing extrusion product defects, and at the same time avoiding thermal damage to the cavity 5, the extrusion wheel 1, etc. caused by the frictional heat generated by slipping, and improving the service life of the cavity 5, the extrusion wheel 1 and other tooling.

[0042] It should be noted that, as Figure 3 shown, the height H of the end face of the material stop block 3 is the maximum vertical distance between the inner surface arc 23 of the material stop block and the sealing arc surface 8, that is, the vertical distance between the center vertex of the inner surface arc 23 of the material stop block and the sealing arc surface 8. The sealing arc surface 8 is the arc surface of the cavity 5 located outside the cavity feed port, and it is located outside the wheel surface 15 of the extrusion wheel 1. As Figure 4 shown, δ is the vertical distance between the boss surface 24 and the sealing arc surface 8.

[0043] In some feasible implementation manners, the material stop block 3 can be integrally formed with the cavity 5 or an independent part assembled with the cavity 5. The material stop block 3 can be a one-piece structure or a combined body assembled by a plurality of independent parts.

[0044] In some feasible implementation manners, the outer contour surface of the material stop block 3 can be an overall arc surface or a smooth connection combination of a curved surface and a plane. As a preferred solution, the outer contour surface of the material stop block 3 is a smooth connection combination of a curved surface and a plane. From Figure 5 and Figure 6 perspectives, the projection of the outer contour surface of the material stop block 3 on the end face of the material stop block 3 is the end face contour line of the material stop block 3. Among them, the front center of the end face contour of the material stop block 3 (i.e., the part close to the annular groove 2) is an arc curved surface, and both sides of the arc curved surface are smoothly tangent to a straight line and transition. The material stop block 3 is smoothly connected and transitioned with the cavity 5 or the boss 22 of the cavity 5 through the two straight lines on both sides.

[0045] In some feasible implementation manners, as Figure 1 and Figure 2As shown, the cavity 5 is installed inside the shoe base 16, and the mold 4 is installed inside the cavity 5 and is arranged near the cavity feed port; on both the upper and lower sides of the cavity feed port of the cavity 5, there are provided bosses 22, and the surface 24 of the boss (i.e., the surface of the boss 22) has an arc surface adapted to the outer circular shape of the extrusion wheel 1. In practical applications, the surface 24 of the boss can be an arc surface, or a combination of an arc surface, a plane, and a curved surface. On the surface 24 of the boss on the lower side of the cavity feed port, the aforementioned material blocking block 3 is provided. As Figure 2 shown, at the upper end of the cavity 5, there is also installed a feed guide plate 9. The feed guide plate 9 also has bosses 22 with the same width dimension as those on the cavity 5, and the surface of the boss of the feed guide plate 9 is smoothly connected to the surface 24 of the boss on the upper side of the cavity 5. At the upper end of the feed guide plate 9, there is provided a pressing plate 10. The pressing plate 10 is fixed to the shoe base 16 by screws or bolts, thereby pressing and fixing the feed guide plate 9 and the cavity 5 on the shoe base 16. After the rod stock 25 passes through the compaction wheel 6, the rod stock 25 enters the annular groove 2, passes through the feed guide plate 9 and the cavity 5, and reaches the material blocking block 3. Under the blocking action of the material blocking block 3, the rod stock 25 enters the cavity feed port and is extruded into a product through the mold 4. During this process, the rod stock 25 experiences a upsetting section. It should be noted that the width direction of the boss 22 on the aforementioned cavity 5 is parallel to the end face width direction of the material blocking block 3, and the width dimension of the boss 22 on the aforementioned cavity 5 is generally the same as the end face width W dimension of the material blocking block 3.

[0046] It should be emphasized that, as Figure 4 shown, the height of the bosses 22 on both the cavity 5 and the feed guide plate 9 is δ, and the value range of δ is between 0 mm and 3 mm. When δ = 0, it means that there are no bosses 22 on the cavity 5 and the feed guide plate 9. Generally, the height δ of the boss 22 on the feed guide plate 9 is 0 mm to 1 mm smaller than the height δ of the boss 22 on the cavity 5. Such a setting is mainly because the temperature of the cavity 5 is relatively high during the working process, and after thermal expansion, the height of the boss 22 on the cavity 5 is closer to the same height as the height of the boss 22 on the feed guide plate 9.

[0047] In some feasible implementation manners, the bosses 22 can be arranged in segments on the feed guide plate 9 and the cavity 5, that is, the bosses 22 on the feed guide plate 9 and the cavity 5 are separately arranged; or the feed guide plate 9 and the cavity 5 can be set as an integral part, and the bosses 22 on the feed guide plate 9 and the cavity 5 are arranged in an integral structure. In actual operation, it is also an optional solution to design each boss 22 as an assembly of multiple parts according to needs.

[0048] In some feasible implementation manners, the rod stock 25 is a metal rod stock, including but not limited to copper rods, etc.

[0049] The above-mentioned continuous extrusion device has a reasonable structural design. By designing the dimensional assembly relationship among the diameter d of the rod material 25, the end face width W of the stop block 3, the notch width W1 of the annular groove 2, the end face height H of the stop block 3, and the height δ of the boss 22, the contact area between the rod material 25 and the annular groove 2 after upsetting can be improved. The function of this design is to make the cross-sectional area formed by the actual effective driving groove 26 and the boss 22 slightly larger and closer to the cross-sectional area of the rod material 25 after passing through the compaction wheel 6. According to the principle of volume invariance, the linear velocity of the rod material 25 after passing through the upsetting section can be very close to the linear velocity of the annular groove 2, thereby reducing the slipping amount between the rod material 25 after upsetting and the annular groove 2, further reducing the temperature of the rod material 25 (blank), reducing extrusion product defects, and at the same time avoiding thermal damage to the cavity 5, the extrusion wheel 1, etc. caused by the frictional heat generated by slipping, and improving the service life of the cavity 5, the extrusion wheel 1 and other tooling. Since the slipping amount between the rod material 25 and the annular groove 2 is reduced, the extrusion energy consumption is reduced, the production cost is greatly reduced, and at the same time, the quality and production efficiency of the extrusion product are improved.

[0050] It should be noted that the upsetting or upsetting section mentioned throughout the present invention refers to the filling process in which the rod material fills the entire annular groove through plastic deformation in a certain section before reaching the inlet of the cavity after being compacted.

[0051] Embodiment 2

[0052] As Figure 1 and Figure 2 shown, this embodiment provides a continuous extrusion forming system 100. In addition to the continuous extrusion device disclosed in Embodiment 1, a compaction wheel assembly 13 and a scraper assembly 14 are also configured and installed on the frame 11. The scraper assembly 14 is located on the side of the extrusion wheel 1 opposite to the cavity 5, and the scraper assembly 14 is used to remove the overflow material on the wheel surface 15 of the extrusion wheel 1. The compaction wheel assembly 13 includes a compaction wheel 6, and the compaction wheel assembly 13 is used to press the rod material 25 into the annular groove 2 of the extrusion wheel 1 through the compaction wheel 6 to establish an initial frictional force between the rod material 25 (blank) and the annular groove 2. The compaction wheel assembly 13 and the scraper assembly 14 are both conventional designs in continuous extrusion technology and will not be elaborated here.

[0053] In some feasible implementation manners, the shoe seat 16 is installed on the frame 11 through the shoe seat pivot 17, and the shoe seat 16 can rotate around the shoe seat pivot 17 to drive the cavity 5 to open and close relative to the extrusion wheel 1; both ends of the shoe seat pivot 17 are installed on the frame 11, and the shoe seat 16 is locked during operation by positioning the shoe seat 16 on the frame 11 through the pressing device 18. At this time, the cavity 5 and the extrusion wheel 1 are as Figure 1In the closed state shown, the pressing device 18 can rotate around the pressing device shaft 19 to ensure that the shoe base 16 can be opened. Both ends of the pressing device shaft 19 are installed on the frame 11. The opening and closing of the shoe base 16 are realized by the oil cylinder 20. One end of the oil cylinder 20 is hinged to the shoe base 16, and the other end of the oil cylinder 20 is hinged to the base 21 below the frame 11. After the pressing device 18 releases the pressing on the shoe base 16, by driving the oil cylinder 20 to extend and retract, the shoe base 16 can be driven to open and close relative to the extrusion wheel 1.

[0054] In some feasible embodiments, a die hole can be provided on the die 4, or two die holes can be provided. By adopting the double-hole mode to extrude two products simultaneously, the processing efficiency can be improved. The die 4 and its arrangement form in the cavity 5 are common general knowledge in the art and will not be elaborated here.

[0055] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of description and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0056] In the present invention, specific examples are used to elaborate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A continuous extrusion device, comprising an extrusion wheel (1), a material blocking block (3), a cavity (5) and a frame (11). An annular groove (2) is provided on the outer periphery of the extrusion wheel (1), and the extrusion wheel (1) is mounted on the frame (11) through a main shaft (12); the cavity (5) is mounted on a shoe base (16) and is located on one side of the extrusion wheel (1); the material blocking block (3) is located outside the cavity feed port of the cavity (5), and is characterized in that, When the cavity (5) is closed with the extrusion wheel (1), the material blocking block (3) is embedded in the annular groove (2), and the material blocking block (3) is in clearance fit with the annular groove (2), where: The end face width W of the material blocking block (3) = [d + (0.1 - 1.8)] mm, where d is the diameter of the rod stock (25) to be extruded; The notch width W1 of the annular groove (2) = [W + (0.1 - 2)] mm; The end face height H of the material blocking block (3) satisfies W ≥ (H - δ), where δ is the height of the boss (22) of the cavity (5), and 0 ≤ δ ≤ 3 mm.

2. The continuous extrusion device according to claim 1, characterized in that, The boss (22) of the cavity (5), the material blocking block (3), and the cavity (5) are integrally formed; or, the material blocking block (3) is an independent part assembled with the cavity (5).

3. The continuous extrusion device according to claim 1, wherein The outer contour surface of the material blocking block (3) is an arc surface; or, the outer contour surface of the material blocking block (3) is composed of a smooth connection combination of a curved surface and a plane.

4. The continuous extrusion device according to any one of claims 1 to 3, characterized in that, It further includes a die (4), and the die (4) is arranged in the cavity (5) and is located at the cavity feed port.

5. The continuous extrusion device according to any one of claims 1 to 3, characterized in that, It further includes a telescopic cylinder; the boot seat (16) is rotatably installed on the frame (11); one end of the telescopic cylinder is hinged to the boot seat (16), and the other end of the telescopic cylinder is hinged to the frame (11) or the base (21) below the frame (11), and the telescopic cylinder is used to drive the cavity (5) to open and close relative to the extrusion wheel (1).

6. The continuous extrusion device according to claim 5, characterized in that The telescopic cylinder is an oil cylinder or an air cylinder.

7. A continuous extrusion forming system, characterized in that, It includes a compaction wheel assembly (13) and the continuous extrusion device according to any one of claims 1 to 6. The compaction wheel assembly (13) is arranged on the frame (11), and the compaction wheel assembly (13) includes a compaction wheel (6). The compaction wheel assembly (13) is used to press the rod stock (25) into the annular groove (2) through the compaction wheel (6) to establish an initial frictional force between the rod stock (25) and the annular groove (2).

8. The continuous extrusion forming system according to claim 7, characterized in that, It further includes a feed guide plate (9). The feed guide plate (9) is located at the upper end of the cavity (5) and is fixedly pressed on the boot seat (16) through a pressing plate (10); the feed guide plate (9) is provided with the boss (22), and the boss (22) on the feed guide plate (9) is in transitional connection with the boss (22) on the cavity (5); the boss (22) on the feed guide plate (9) has the same width as the boss (22) on the cavity (5), the height δ of the boss (22) on the feed guide plate (9) is 0 - 3 mm, and the height δ of the boss (22) on the feed guide plate (9) is 0 mm - 1 mm smaller than the height δ of the boss (22) on the cavity (5).

9. The continuous extrusion forming system according to claim 7 or 8, characterized in that, It further includes a pressing device (18), and the pressing device (18) is used to press the boot seat (16) after the cavity (5) is closed with the extrusion wheel (1).

10. The continuous extrusion forming system according to claim 7 or 8, characterized in that, It further includes a scraper assembly (14), which is arranged on the frame (11) and is located on the side of the extrusion wheel (1) opposite to the cavity (5). The scraper assembly (14) is used to remove the overflow material on the surface of the extrusion wheel (1).

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