Continuous extrusion machinery

Abstract

A continuous extrusion machinery (Figure 1) for chordwise extrusion includes a rack 13, and an extrusion wheel 1. A compaction wheel assembly 14 and a chamber 6 are mounted on the rack. The extrusion

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of metal extrusion, in particular to a continuous extrusion machinery. BACKGROUND

[0002] A key technology of continuous extrusion is how to reduce the radial pressure and torque of an extrusion wheel to improve the service lives of the extrusion wheel, main shaft and main shaft bearing.

[0003] The invention patent CN201310022732.6 discloses a continuous extrusion method and extrusion equipment for non-radial feeding. Although the right-angle flow of extrusion rod materials in front of an abutment is changed into obtuse-angle flow resulting in a reduction of the extrusion resistance, the height of a chamber feed port on the side close to an arcuate sealing block is obviously higher than that on the side close to the abutment, resulting in an increase in the flow resistance and obvious increases in the extrusion temperature and pressure.

[0004] Therefore, it is urgent to provide a novel continuous extrusion machinery to reduce the extrusion load. SUMMARY

[0005] The present disclosure aims to provide a continuous extrusion machinery so as to solve problems in the prior art. The extrusion load can be effectively reduced, and the service life of the device is prolonged.

[0006] In order to achieve the purpose, the present disclosure provides the following scheme.

[0007] The present disclosure provides a continuous extrusion machinery for chord extrusion. The continuous extrusion machinery for chord extrusion includes a rack, and an extrusion wheel, a compaction wheel assembly and a chamber which are mounted on the rack. The extrusion wheel is rotatably mounted on the rack through a main shaft. An annular groove is formed in the extrusion wheel. The compaction wheel assembly is configured for pressing extrusion rod materials into the annular groove of the extrusion wheel. An abutment and a die are arranged on the chamber. The abutment is configured to block the extrusion rod materials in the annular groove so that the extrusion rod materials are fed into the die. A front end, away from the extrusion wheel, of a stop surface of the abutment is engaged with a die mounting surface, the die is embedded in the die mounting surface. Adie hole center line of the die is located in a chord direction, other than a radial direction, of the extrusion wheel, an angle between an extrusion wheel center line passing through a starting point of the stop surface and the die mounting surface is P, and a value of P is less than or equal to 85° and more than or equal to 10°. Where, the starting point of the stop surface is an end point of the stop surface close to the extrusion wheel and located on a section of the abutment.

[0008] Preferably, a surface, close to a groove bottom of the annular groove, of the abutment is a sealing cambered surface. A rear end of the sealing cambered surface is engaged with an expanded surface. A point B is arranged on the expanded surface at a position 30 mm backward from a starting point A of the expanded surface. An included angle between a connecting line of the starting point A and the point B and the die hole center line is 0, and a value of 0 is less than or equal to P+20° and more than or equal to P+3°. The starting point A and the point B are both located on the section of the abutment in which the die hole center line is located, and the starting point A is an end point of the expanded surface close to the sealing cambered surface.

[0009] Preferably, an vertical distance from the die hole center line to a extrusion wheel center line parallel to the die hole center line is H, a value of H is less than or equal to 0.4981D+w and more than or equal to 0.0868D+w. Where, D is a diameter of the extrusion wheel, and w is a notch width of the annular groove.

[0010] Preferably, a front end of the chamber is provided with an arcuate sealing block, surfaces, facing the extrusion wheel, of the chamber and the arcuate sealing block are provided with a boss, and the boss is able to extend into the annular groove. Boss side planes on both sides of the boss extend to the die mounting surface and are flush with respective abutment side planes of the abutment, and a gap from each of the boss side plane to a corresponding one of side planes of an annular groove open end is 8, and a value of 8 ranges from 0.001 mm to 0.2 mm.

[0011] Preferably, in a case of a length of the die mounting surface toward the arcuate sealing block is not more than 30 mm, a vertical distance of the boss extending into the annular groove is m, a value of m is more than or equal to 3.5 mm, a height of each of the side planes of annular groove open end is n, and a value of n is more than or equal to the value of m.

[0012] Preferably, a boss surface of the boss is a cambered surface, or the boss surface is a combination of a cambered surface, a curved surface and a plane.

[0013] The die mounting surface is a plane or a curved surface, or the die mounting surface is a combination of a plane and a curved surface.

[0014] Preferably, a die cooling channel is formed in the abutment, one end of the die cooling channel extends out of the chamber, and another end of the die cooling channel is close to the die, so as to feed a cooling medium into the die.

[0015] Preferably, two die holes are formed in the die symmetrically with respect to a groove symmetry plane of the annular groove, or two die holes arranged in an up and down direction are formed in the die.

[0016] Preferably, the chamber is mounted on a shoe. The shoe is rotatably mounted on the rack through a shoe pivot, and the shoe is connected with a driving device. The driving device is able to drive the shoe to rotate. A locking device is also rotatably mounted on the rack, and the locking device is able to lock the shoe.

[0017] Where, the shoe is horizontally or vertically arranged.

[0018] Compared with the prior art, the present disclosure has the following beneficial technical effects.

[0019] The die is mounted on the abutment, so that a flow path of the extrusion rod materials is the shortest to minimize the path friction between the extrusion rod materials and the abutment in the extrusion process, so that the extrusion load can be effectively reduced, and the service life of the device is prolonged. Moreover, in the present disclosure, the flow path of the extrusion rod materials is changed from the approximate right-angle flow of traditional continuous extrusion to the obtuse-angle flow, so that the extrusion load is reduced. Compared with traditional tangential extrusion, the damage of the abutment is reduced, and the service life of the device can be further prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To illustrate the present embodiment of the present disclosure or the technical scheme in the prior art more clearly, the following briefly introduces the accompanying drawings to be used in the present embodiment. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and those skilled in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0021] FIG. 1 is a sectional view of a continuous extrusion machinery taken along an annular groove center line when a shoe is vertically arranged according to an embodiment of the present disclosure.

[0022] FIG. 2 is an A-A sectional view of FIG. 1.

[0023] FIG. 3 is a partial enlarged view of FIG. 1, only leaving parts of an arcuate sealing block, a chamber, an abutment, a die, a chamber sleeve, a pressing plate, an extrusion wheel and a shoe.

[0024] FIG. 4 is a partial enlarged drawing of FIG. 3, only leaving the die and the abutment and only providing one die hole.

[0025] FIG. 5 is a partial enlarged drawing of FIG. 3, only leaving the die and the abutment and providing two die holes arranged in an up and down direction.

[0026] FIG. 6 is a B-B sectional view of FIG. 3, only leaving parts of the extrusion wheel, the abutment and the chamber.

[0027] FIG. 7 is a schematic view of an arcuate sealing block with a conventional boss in FIG. 6.

[0028] FIG. 8 is a schematic view of an arcuate sealing block with a boss for axial sealing in FIG. 6.

[0029] FIG. 9 is a C-C sectional view of FIG. 8, only leaving parts of an arcuate sealing block, a chamber, an abutment, a die, a chamber sleeve, a pressing plate, an extrusion wheel and a shoe.

[0030] FIG. 10 is a D-D sectional view of FIG. 4, only providing one die hole.

[0031] FIG. 11 is a schematic diagram of FIG. 10 replaced by two die holes horizontally arranged.

[0032] FIG. 12 is a sectional view of a continuous extrusion machinery taken along an annular groove center line when a shoe is horizontally arranged according to the embodiment of the present disclosure.

[0033] FIG. 13 is a partial enlarged view of FIG. 12, only leaving parts of an arcuate sealing block, a chamber, an abutment, a die, a pressing plate, an extrusion wheel and a shoe.

[0034] Reference signs: 1, extrusion wheel; 2, abutment; 3, die mounting surface; 4, die; 5, arcuate sealing block; 6, chamber; 7, chamber cover; 8, annular groove; 9, arcuate sealing block cambered surface; 10, main shaft; 11, bearing; 12, bearing seat; 13, rack; 14, compaction wheel assembly; 15, scraper assembly; 16, shoe; 17, shoe pivot; 18, compressing device; 19, compressing device shaft; 20, first oil cylinder; 21, pressing plate; 22, chamber sleeve; 23, die cooling channel; 24, wheel surface; 25, sealing cambered surface; 26, extrusion wheel inner surface; 27, extrusion wheel center line parallel to die hole center line; 28, die hole center line; 28-1, outlet center line I of die two-hole extrusion product; 28-2, outlet center line II of die two-hole extrusion product; 29, die hole; 30, groove symmetry plane; 31, stop surface; 32, side plane of annular groove open end; 33, abutment side plane; 34, boss side plane; 35, boss; 36, boss surface; 37, extrusion wheel center line passing through starting point of stop surface; 38, expanded surface; 39, connecting line from starting point Ato point B; 40, second oil cylinder;

[0035] H, vertical distance from die hole center line to extrusion wheel center line parallel to die hole center line;

[0036] Hl, vertical distance from outlet center line I of die two-hole extrusion product to extrusion wheel center line parallel to die hole center line;

[0037] H2, vertical distance from outlet center line II of die two-hole extrusion product to extrusion wheel center line parallel to die hole center line;

[0038] P, included angle between extrusion wheel center line passing through starting point of stop surface and die mounting surface;

[0039] e, included angle between connecting line from starting point A to point B and die hole center line;

[0040] y, complementary angle of angle P, y being equal to 180°-P;

[0041] m, vertical distance of boss extending into annular groove;

[0042] n, height of side plane of annular groove open end;

[0043] 5, gap between boss side plane and corresponding side plane of annular groove open end; and

[0044] w, notch width of annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The foilowing clearly and completely describes the technical scheme in the present embodiments of the present disclosure with reference to the accompanying drawings in the present embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the present embodiments of the present disclosure. Based on the embodiment in the present disclosure, all other embodiments obtained by those of ordinary skilled in the art without contributing creative effort belong to the scope of the present disclosure.

[0046] The objective of the present disclosure is to provide a continuous extrusion machinery so as to solve the foregoing problems in the prior art, so that the extrusion load can be effectively reduced and the service life of a die is prolonged.

[0047] To make the foregoing objective, features and advantages of the present disclosure clearer and more comprehensible, the present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Embodiment I

[0049] As shown in FIG. 1 to FIG. 13, the embodiment provides a continuous extrusion machinery. The continuous extrusion machinery includes a rack 13, and an extrusion wheel 1, a compaction wheel assembly 24, a chamber 2 and a die 4 which are mounted on the rack 13. The extrusion wheel 1 is rotatably mounted on the rack 13 through a main shaft 12. Specifically, bearings 11 are arranged on two ends of the main shaft 10 for supporting the main shaft 10. The bearing 11 is mounted in a bearing seat 12. The bearing seat 12 is mounted on the rack 13. The rack 13 is mounted on a base (not shown in figures). An annular groove 8 is formed in an outer circumferential surface of the extrusion wheel 1. The compaction wheel assembly 24 is configured for pressing extrusion rod materials into the annular groove 8 of the extrusion wheel 1. An abutment 2 and a die 4 are provided on the chamber 6. The abutment 2 can block the extrusion rod materials inside the annular groove 8 so as to feed it into the die 4. It needs to be noted that the structure refers to a mature prior art in this field, and unnecessary details are not given any more in the embodiment.

[0050] In the embodiment, a stop surface 31 of the abutment 2 is engaged with a die mounting surface 3 away from the extrusion wheel 1, the die 4 is embedded in a mounting hole or a mounting groove in the die mounting surface 3, and a die hole center line 28 of the die 4 is located in a chord direction of the extrusion wheel 1.

[0051] In the embodiment, the die 4 is mounted on the abutment 2, so that a flow path of the extrusion rod materials is the shortest to minimize the path friction between the extrusion rod materials and the abutment 2 in the extrusion process, so that the extrusion load can be effectively reduced, and the service life of the device is prolonged. Moreover, in the embodiment, the flow path of the extrusion rod materials is changed from the approximate right-angle flow of traditional continuous extrusion to the obtuse-angle flow, so that the extrusion load is reduced. Compared with traditional tangential extrusion where the abutment 2 is sheared in a large part, the stress state of the abutment 2 of the present disclosure is changed to a unidirectional compression state in a large part and a shear state in a small part, so that the damage caused by reason that the abutment is sheared in a large part can be reduced, and the service life of the device can be further prolonged.

[0052] In the embodiment, the chamber 6 is mounted on a shoe 16. As shown in FIG. 1, the shoe 16 is vertically arranged and rotatably mounted on the rack 13 via a shoe pivot 17. The shoe 16 is connected with the shoe pivot 17 with splines. Two ends of the shoe pivot 17 are mounted on the rack 13. One end of the shoe pivot 17 is connected with an oil motor (not shown in figures). The oil motor rotates to drive the shoe 16 to be opened and closed. The shoe 16 is locked on the rack 13 by a compressing device 18 in operation. The compressing device 18 can rotate around a compressing device shaft 19 to ensure that the shoe 16 can be opened. Two ends of the compressing device shaft 19 are mounted on the rack 13. The compressing device 18 is opened and closed by means of a first oil cylinder 20. One end of the first oil cylinder 20 is connected to the compressing device 18, and the other end of the first oil cylinder 20 is connected to the rack 13.

[0053] In the embodiment, as shown in FIG. 2, the bearing 11 is preferably a cylindrical roller bearing, so that the main shaft can be easily moved on the bearing seat 12, and the abutment 2 can be automatically aligned with the annular groove 8.

[0054] In the embodiment, as shown in FGI. 10 and FIG. 11, a cooling water groove is formed in an extrusion wheel inner surface 26 (an inner ring surface of the extrusion wheel close to the main shaft 10). The cooling water groove can be filled with cooling water for cooling the extrusion wheel 1, thus reducing the amount of the thermal expansion of the extrusion wheel 1 and avoiding direct contact between a side plane of annular groove open end 32 and an abutment side plane 33 caused by the thermal expansion to avoid abrasion between them.

[0055] In the embodiment, as shown in FIG. 1 and FIG. 12, a scraper assembly 15 is also mounted on the rack 13, and the scraper assembly 14 is configured for removing the overflow on a wheel surface 24 of the extrusion wheel.

[0056] In the embodiment, as shown in FIG. 12, another scheme is given for opening and closing the shoe 16 by means of a second oil cylinder 40, and for opening and closing the compressing device 18 by hands.

[0057] In the embodiment, as shown in FIG. 1 and FIG. 12, when an angle P is larger, the device arrangement structure shown in FIG. 1 is preferably adopted, that is, the shoe 16 is vertically arranged. When an angle P is smaller, the device arrangement structure shown in FIG. 12 is preferably adopted, that is, the shoe 16 is horizontally arranged. By adopting the foregoing device arrangement structure, the compressing pressure is reduced, and the mechanical strength of the device is improved.

[0058] Alternatively, the shoe 16 may be arranged obliquely, and in addition that the main shaft 10 can be horizontally arranged substantially parallel to the ground, the main shaft 10 also can be arranged substantially perpendicular to the ground, thus forming a continuous extrusion machinery vertically arranged.

[0059] In the embodiment, as shown in FIG. 3, the chamber 6 is mounted inside a chamber sleeve 22 in the shoe 16 (the chamber sleeve is not shown in FIG. 3, but shown in FIG. 1). The abutment 2 is mounted on the chamber 6. The die 4 is mounted on the die mounting surface 3. The chamber cover 7 fixes the abutment 2 on the chamber 6. An arcuate sealing block 5 is mounted on a front end of the chamber 6 close to the compaction wheel assembly 14. An upper end of the arcuate sealing block 5 is provided with a pressing plate 21 for fixing the arcuate sealing block 5 and the die 4 on the shoe 16.

[0060] The purpose of arranging the chamber sleeve 22 is to feed cooling water into the chamber sleeve 22 so as to reduce the temperature of the abutment 2 and the chamber 6. At the same time, the chamber sleeve 22 is convenient to be replaced when the chamber sleeve 22 is further damaged due to accidental damage of the abutment 2.

[0061] In the embodiment, as shown in FIGS. 3-5 and FIG. 9, the abutment 2 and the annular groove 8 cooperate with each other. The abutment 2 is provided with a sealing cambered surface 25. A starting end of the sealing cambered surface 25 is provided with the stop surface 31. The stop surface 31 is engaged with the die mounting surface 3. Amounting hole or a mounting groove is formed in the die mounting surface 3 for mounting the die 4. A die hole 29 is formed in the die 07 06 24 4. The vertical distance from the die hole center line 28 to the extrusion wheel center line parallel to the die hole center line 28 is H, and the value of H ranges from (0.0868D+w) to (0.4981D+w), namely H is more than or equal to (0.4981D+w) and less than or equal to (0.0868D+w). As shown in FIG. 5, two die holes 29 are arranged in an up and down direction. The vertical distance from an outlet center line I of a die two-hole extrusion product to the extrusion wheel center line 27 parallel to the die hole center line is Hl, and the vertical distance from an outlet center line II of a die two-hole extrusion product to the extrusion wheel center line 27 parallel to the die hole center line is H2. The values of Hl and H2 range from (0.0868D+w) to (0.498 ID+w), where, w is the notch width of the annular groove, and D is the diameter of the extrusion wheel.

[0062] In the embodiment, as shown in FIGS. 3-5 and FIG. 9, an included angle between the extrusion wheel center line 37 passing through a starting point of the stop surface and the die mounting surface is P, and the value of P ranges from 10° to 85°.

[0063] In the embodiment, as shown in FIGS. 3-5 and FIG. 9, a rear end of the sealing cambered surface 25 of the abutment 2 is engaged with an expanded surface 38. The expanded surface 38 not only increases the shear support area of the abutment 2, but also effectively increases the heat dissipation area of the abutment 2, so that the temperature of the abutment 2 is reduced to improve the material strength thereof. Therefore, the expanded surface 38 can effectively improve the strength of the abutment 2. The expanded surface 38 can be a cambered surface or a combination of a cambered surface and a plane. A point B is arranged on the expanded surface 38 at a position 30 mm backward from a starting point A. An included angle between a connecting line 39 from the starting point A to the point B and the die hole center line is 0, the value of 0 ranges from P+3° to P+20°. When the expanded surface 38 is a plane, the expanded surface 38 coincides with the connecting line 39 from the starting point Ato the point B.

[0064] In the embodiment, as shown in FIGS. 3-5, a die cooling channel 23 is formed in the chamber 6 and the abutment 2 for feeding a cooling medium to an end surface of the die 4 so as to reduce the die temperature and prolong the sendee life of the die.

[0065] In the embodiment, as shown in FIG. 6, the arcuate sealing block 5 may not be provided with a boss. A certain gap is formed between an arcuate sealing block cambered surface 9 and the wheel surface 24 of the extrusion wheel 1, and the gap is called as a radial gap. In the scheme the radial gap is used to control the overflowing of the overflow.

[0066] As shown in FIG. 7, the arcuate sealing block 5 is provided with a conventional boss 35. A certain gap is formed between a boss side plane 34 and the side plane of annular groove open end 32, and the gap is called as an axial gap. The depth of the boss 34 extending into the annular groove is not more than 2.5 mm. A certain gap is formed between the arcuate sealing block 07 06 24 cambered surface 9 and the wheel surface 24 of the extrusion wheel 1, and the gap is called as a radial gap. In the scheme, the axial gap and the radial gap are used to jointly seal the overflow.

[0067] As shown in FIG. 8 and FIG. 9, the chamber 6 and the arcuate sealing block 5 are provided with the boss 35 extending into the annular groove 8. Two boss side planes 34 of the boss 35 extend to the die mounting surface 3. The gap between the boss side plane 34 and the corresponding side plane of annular groove open end 32 is 8, and the value of 8 ranges from 0.001 mm to 0.2 mm. In a case of a length of the die mounting surface toward the arcuate sealing block is not more than 30 mm, the vertical distance m of the boss 35 extending to the annular groove 8 (namely, the vertical distance from the boss surface 36 to the wheel surface 24 of the extrusion wheel 1) is not less than 3.5 mm, and the value of the height n of the side plane of annular groove open end 32 is not less than the value of m. In the scheme, because the gap between the side plane of annular groove open end 32 and the boss side plane 34 is used to seal the overflow, the gap between the chamber 6 and the arcuate sealing block cambered surface 9 and the extrusion wheel 1 is used as an overflow channel.

[0068] In the embodiment, as shown in FIG. 10 and FIG. 11, the gap between the abutment side plane 33 and the corresponding side plane of annular groove open end 32 is 8 as well, and the value of 6 ranges from 0.001 mm to 0.2 mm.

[0069] In the embodiment, the arcuate sealing block cambered surface 9 can be formed by combining cambered surfaces arranged on the arcuate sealing block 5, the abutment 2 and the chamber 6. The boss surface 36 may be respectively arranged on the chamber 6 and the arcuate sealing block 5, or the chamber 6 and the arcuate sealing block 5 can be provided as an integral part. The boss surface 36 may be an arc surface or another curved surface or a combination of a curved surface and a plane.

[0070] In the embodiment, the abutment 2 and the chamber 6 can be made into an integral part, resulting in the disadvantages that when the abutment is damaged, the whole chamber 6 is scrapped and the production cost is increased. The abutment 2 can be composed of a plurality of split parts.

[0071] In the embodiment, the die mounting surface 3 may be either a flat surface or a curved surface, and the die mounting surface 3 is substantially perpendicular to the die hole center line 28.

[0072] In the embodiment, as shown in FIG. 10 and FIG. 11, one die hole 29 can be formed in the die 4 to extrude one product, or two die holes 29 can be formed horizontally to extrude two products at the same time. When the two die holes 29 are arranged horizontally, the sizes of products of the two die holes 29 should be the same, otherwise the extrusion speed of the two products is greatly different. Alternatively, two die holes 29 may be formed in an up and down direction, or other numbers of die holes 29 may be formed based on specific work requirements.

[0073] It needs to be noted that for those skilled in the art, obviously the present disclosure is not limited to the details of the exemplary embodiment, and the present disclosure can be achieved in other specific forms without departing from the spirit or essential characteristics of the present disclosure. Therefore, in any case, the embodiments should be regarded as illustrative and not restrictive, the scope of the present invention is defined by the appended claims rather than the above description, and all changes that come within the meaning and range of equivalence of the claims are therefore intended to be embraced therein, and the reference signs in the claims should not be construed as limiting the claims to which they refer.

[0074] Specific examples are used for illustration of the principles and implementation methods of the present disclosure. The description of the above-mentioned embodiments is used to help illustrate the method and its core principles of the present disclosure. In addition, those skilled in the art can make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present disclosure. In summary, the contents of this specification should not be understood as the limitation of the present disclosure. CM

Claims

1. A continuous extrusion machinery, comprising a rack, and an extrusion wheel, a compaction wheel assembly and a chamber which are mounted on the rack, wherein the extrusion wheel is rotatably mounted on the rack through a main shaft, an annular groove is formed in the extrusion wheel, and the compaction wheel assembly is configured for pressing extrusion rod materials into the annular groove of the extrusion wheel; an abutment and a die are arranged on the chamber, and the abutment is configured to block the extrusion rod materials inside the annular groove so that the extrusion rod materials are fed into the die; and wherein a front end, away from the extrusion wheel, of a stop surface of the abutment is engaged with a die mounting surface, the die is embedded in the die mounting surface, and a die hole center line of the die is located in a chord direction, other than a radial direction, of the extrusion wheel,wherein an angle between an extrusion wheel center line passing through a starting point of the stop surface and the die mounting surface is P, and a value of P is less than or equal to 85° and more than or equal to 10°; wherein, the starting point of the stop surface is an end point of the stop surface close to the extrusion wheel and located on a section of the abutment.

2. The continuous extrusion machinery according to claim 1, wherein a surface, close to a groove bottom of the annular groove, of the abutment is a sealing cambered surface, a rear end of the sealing cambered surface is engaged with an expanded surface, and a point B is arranged on the expanded surface at a position 30 mm backward from a starting point A of the expanded surface, an included angle between a connecting line from the starting point A to the point B and the die hole center line is 0, a value of 0 is less than or equal to P+20° and more than or equal to P+3°; wherein, the starting point A and the point B are both located on the section of the abutment in which the die hole center line is located, and the starting point Ais an end point of the expanded surface close to the sealing cambered surface.

3. The continuous extrusion machinery according to claim 1, or claim 2 or claim 3, wherein n vertical distance from the die hole center line to a extrusion wheel center line parallel to the die hole center line is H, a value of H is less than or equal to 0.498ID+w and more than or equal to 0.0868D+w; wherein, D is a diameter of the extrusion wheel, and w is a notch width of the annular groove.

4. The continuous extrusion machinery according to claim 1, or any other preceding claim, wherein a front end of the chamber is provided with an arcuate sealing block, surfaces, facing the extrusion wheel, of the chamber and the arcuate sealing block are provided with a boss, and the boss is able to extend into the annular groove; boss side planes on both sides of the boss extend tothe die mounting surface and are flush with respective abutment side planes of the abutment, and a gap from each of the boss side plane to a corresponding one of side planes of annular groove open end is 5, and a value of 5 ranges from 0.001 mm to 0.2 mm.

5. The continuous extrusion machinery according to claim 4, wherein in a case of a length of the die mounting surface toward the arcuate sealing block is not more than 30 mm, a vertical distance of the boss extending into the annular groove is m, a value of m is more than or equal to 3.5 mm, a height of each of the side planes of annular groove open end is n, and a value of n is more than or equal to the value of m.

6. The continuous extrusion machinery according to claim 5, wherein a boss surface of the boss is a cambered surface, or the boss surface is a combination of a cambered surface, a curved surface and a plane; andthe die mounting surface is a plane or a curved surface, or the die mounting surface is a combination of a plane and a curved surface.

7. The continuous extrusion machinery according to claim 1, or any other preceding claim, wherein a die cooling channel is formed in the abutment, one end of the die cooling channel extends out of the chamber, and another end of the die cooling channel is close to the die, so as to feed a cooling medium into the die.

8. The continuous extrusion machinery according to claim 1, or any other preceding claim, wherein two die holes are formed in the die symmetrically with respect to a groove symmetry plane of the annular groove, or two die holes arranged in an up and down direction are formed in the die.

9. The continuous extrusion machinery according to claim 1, or any other preceding claim, wherein the chamber is mounted on a shoe, the shoe is rotatably mounted on the rack through a shoe pivot, the shoe is connected with a driving device, and the driving device is able to drive the shoe to rotate; and a locking device is also rotatably mounted on the rack, and the locking device is able to lock the shoe;wherein, the shoe is horizontally or vertically arranged.

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